text: /**
   * \file
   * mono Ahead of Time compiler
   *
   * Author:
   *   Dietmar Maurer (dietmar@ximian.com)
   *   Zoltan Varga (vargaz@gmail.com)
   *
   * (C) 2002 Ximian, Inc.
   * Copyright 2003-2011 Novell, Inc.
   * Copyright 2011 Xamarin, Inc.
   * Licensed under the MIT license. See LICENSE file in the project root for full license information.
   */
  
  #include "config.h"
  #include <sys/types.h>
  #ifdef HAVE_UNISTD_H
  #include <unistd.h>
  #endif
  #include <fcntl.h>
  #include <string.h>
  #ifdef HAVE_SYS_MMAN_H
  #include <sys/mman.h>
  #endif
  
  #if HOST_WIN32
  #include <winsock2.h>
  #include <windows.h>
  #endif
  
  #ifdef HAVE_EXECINFO_H
  #include <execinfo.h>
  #endif
  
  #include <errno.h>
  #include <sys/stat.h>
  
  #ifdef HAVE_SYS_WAIT_H
  #include <sys/wait.h>  /* for WIFEXITED, WEXITSTATUS */
  #endif
  
  #include <mono/metadata/abi-details.h>
  #include <mono/metadata/tabledefs.h>
  #include <mono/metadata/class.h>
  #include <mono/metadata/object.h>
  #include <mono/metadata/tokentype.h>
  #include <mono/metadata/appdomain.h>
  #include <mono/metadata/debug-helpers.h>
  #include <mono/metadata/assembly.h>
  #include <mono/metadata/assembly-internals.h>
  #include <mono/metadata/metadata-internals.h>
  #include <mono/metadata/exception-internals.h>
  #include <mono/metadata/marshal.h>
  #include <mono/metadata/gc-internals.h>
  #include <mono/metadata/threads-types.h>
  #include <mono/metadata/mono-endian.h>
  #include <mono/utils/mono-logger-internals.h>
  #include <mono/utils/mono-mmap.h>
  #include <mono/utils/mono-compiler.h>
  #include <mono/utils/mono-counters.h>
  #include <mono/utils/mono-digest.h>
  #include <mono/utils/mono-threads-coop.h>
  #include <mono/utils/bsearch.h>
  #include <mono/utils/mono-tls-inline.h>
  
  #include "mini.h"
  #include "seq-points.h"
  #include "version.h"
  #include "debugger-agent.h"
  #include "aot-compiler.h"
  #include "aot-runtime.h"
  #include "jit-icalls.h"
  #include "mini-runtime.h"
  #include "mono-private-unstable.h"
  #include "llvmonly-runtime.h"
  
  #ifndef DISABLE_AOT
  
  #ifdef TARGET_OSX
  #define ENABLE_AOT_CACHE
  #endif
  
  #ifdef MONO_ARCH_CODE_EXEC_ONLY
  extern guint8* mono_aot_arch_get_plt_entry_exec_only (gpointer amodule_info, host_mgreg_t *regs, guint8 *code, guint8 *plt);
  extern guint32 mono_arch_get_plt_info_offset_exec_only (gpointer amodule_info, guint8 *plt_entry, host_mgreg_t *regs, guint8 *code, MonoAotResolvePltInfoOffset resolver, gpointer amodule);
  extern void mono_arch_patch_plt_entry_exec_only (gpointer amodule_info, guint8 *code, gpointer *got, host_mgreg_t *regs, guint8 *addr);
  #endif
  
  #define ROUND_DOWN(VALUE,SIZE)	((VALUE) & ~((SIZE) - 1))
  
  typedef struct {
  	int method_index;
  	MonoJitInfo *jinfo;
  } JitInfoMap;
  
  #define GOT_INITIALIZING 1
  #define GOT_INITIALIZED  2
  
  struct MonoAotModule {
  	char *aot_name;
  	/* Pointer to the Global Offset Table */
  	gpointer *got;
  	gpointer *llvm_got;
  	gpointer *shared_got;
  	GHashTable *name_cache;
  	GHashTable *extra_methods;
  	/* Maps methods to their code */
  	GHashTable *method_to_code;
  	/* Maps pointers into the method info to the methods themselves */
  	GHashTable *method_ref_to_method;
  	MonoAssemblyName *image_names;
  	char **image_guids;
  	MonoAssembly *assembly;
  	MonoImage **image_table;
  	guint32 image_table_len;
  	gboolean out_of_date;
  	gboolean plt_inited;
  	int got_initialized;
  	guint8 *mem_begin;
  	guint8 *mem_end;
  	guint8 *jit_code_start;
  	guint8 *jit_code_end;
  	guint8 *llvm_code_start;
  	guint8 *llvm_code_end;
  	guint8 *plt;
  	guint8 *plt_end;
  	guint8 *blob;
  	gpointer weak_field_indexes;
  	guint8 *method_flags_table;
  	/* Maps method indexes to their code */
  	gpointer *methods;
  	/* Sorted array of method addresses */
  	gpointer *sorted_methods;
  	/* Method indexes for each method in sorted_methods */
  	int *sorted_method_indexes;
  	/* The length of the two tables above */
  	int sorted_methods_len;
  	guint32 *method_info_offsets;
  	guint32 *ex_info_offsets;
  	guint32 *class_info_offsets;
  	guint32 *got_info_offsets;
  	guint32 *llvm_got_info_offsets;
  	guint32 *methods_loaded;
  	guint16 *class_name_table;
  	guint32 *extra_method_table;
  	guint32 *extra_method_info_offsets;
  	guint32 *unbox_trampolines;
  	guint32 *unbox_trampolines_end;
  	guint32 *unbox_trampoline_addresses;
  	guint8 *unwind_info;
  
  	/* Points to the mono EH data created by LLVM */
  	guint8 *mono_eh_frame;
  
  	/* Points to the data tables if MONO_AOT_FILE_FLAG_SEPARATE_DATA is set */
  	gpointer tables [MONO_AOT_TABLE_NUM];
  	/* Points to the trampolines */
  	guint8 *trampolines [MONO_AOT_TRAMP_NUM];
  	/* The first unused trampoline of each kind */
  	guint32 trampoline_index [MONO_AOT_TRAMP_NUM];
  
  	gboolean use_page_trampolines;
  
  	MonoAotFileInfo info;
  
  	gpointer *globals;
  	MonoDl *sofile;
  
  	JitInfoMap *async_jit_info_table;
  	mono_mutex_t mutex;
  };
  
  typedef struct {
  	void *next;
  	unsigned char *trampolines;
  	unsigned char *trampolines_end;
  } TrampolinePage;
  
  static GHashTable *aot_modules;
  #define mono_aot_lock() mono_os_mutex_lock (&aot_mutex)
  #define mono_aot_unlock() mono_os_mutex_unlock (&aot_mutex)
  static mono_mutex_t aot_mutex;
  
  /* 
   * Maps assembly names to the mono_aot_module_<NAME>_info symbols in the
   * AOT modules registered by mono_aot_register_module ().
   */
  static GHashTable *static_aot_modules;
  /* 
   * Same as above, but tracks module that must be loaded before others are
   * This allows us to have a "container" module which contains resources for
   * other modules. Since it doesn't provide methods for a managed assembly,
   * and it needs to be fully loaded by the time the other code needs it, it
   * must be eagerly loaded before other modules.
   */
  static char *container_assm_name;
  static MonoAotModule *container_amodule;
  
  /*
   * Maps MonoJitInfo* to the aot module they belong to, this can be different
   * from ji->method->klass->image's aot module for generic instances.
   */
  static GHashTable *ji_to_amodule;
  
  /* Maps method addresses to MonoAotMethodFlags */
  static GHashTable *code_to_method_flags;
  
  /*
   * Whenever to AOT compile loaded assemblies on demand and store them in
   * a cache.
   */
  static gboolean enable_aot_cache = FALSE;
  
  static gboolean mscorlib_aot_loaded;
  
  /* For debugging */
  static gint32 mono_last_aot_method = -1;
  
  static gboolean make_unreadable = FALSE;
  static guint32 name_table_accesses = 0;
  static guint32 n_pagefaults = 0;
  
  /* Used to speed-up find_aot_module () */
  static gsize aot_code_low_addr = (gssize)-1;
  static gsize aot_code_high_addr = 0;
  
  /* Stats */
  static gint32 async_jit_info_size;
  
  #ifdef MONOTOUCH
  #define USE_PAGE_TRAMPOLINES (mscorlib_aot_module->use_page_trampolines)
  #else
  #define USE_PAGE_TRAMPOLINES 0
  #endif
  
  #define mono_aot_page_lock() mono_os_mutex_lock (&aot_page_mutex)
  #define mono_aot_page_unlock() mono_os_mutex_unlock (&aot_page_mutex)
  static mono_mutex_t aot_page_mutex;
  
  static MonoAotModule *mscorlib_aot_module;
  
  /* Embedding API hooks to load the AOT data for AOT images compiled with MONO_AOT_FILE_FLAG_SEPARATE_DATA */
  static MonoLoadAotDataFunc aot_data_load_func;
  static MonoFreeAotDataFunc aot_data_free_func;
  static gpointer aot_data_func_user_data;
  
  static void
  init_plt (MonoAotModule *info);
  
  static void
  compute_llvm_code_range (MonoAotModule *amodule, guint8 **code_start, guint8 **code_end);
  
  static gboolean
  init_method (MonoAotModule *amodule, gpointer info, guint32 method_index, MonoMethod *method, MonoClass *init_class, MonoError *error);
  
  static MonoJumpInfo*
  decode_patches (MonoAotModule *amodule, MonoMemPool *mp, int n_patches, gboolean llvm, guint32 *got_offsets);
  
  static void
  amodule_lock (MonoAotModule *amodule)
  {
  	mono_os_mutex_lock (&amodule->mutex);
  }
  
  static void
  amodule_unlock (MonoAotModule *amodule)
  {
  	mono_os_mutex_unlock (&amodule->mutex);
  }
  
  /*
   * load_image:
   *
   *   Load one of the images referenced by AMODULE. Returns NULL if the image is not
   * found, and sets @error for what happened
   */
  static MonoImage *
  load_image (MonoAotModule *amodule, int index, MonoError *error)
  {
  	MonoAssembly *assembly;
  	MonoImageOpenStatus status;
  	MonoAssemblyLoadContext *alc = mono_domain_ambient_alc (mono_domain_get ());
  
  	g_assert (index < amodule->image_table_len);
  
  	error_init (error);
  
  	if (amodule->image_table [index])
  		return amodule->image_table [index];
  	mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: module %s wants to load image %d: %s", amodule->aot_name, index, amodule->image_names[index].name);
  	if (amodule->out_of_date) {
  		mono_error_set_bad_image_by_name (error, amodule->aot_name, "Image out of date: %s", amodule->aot_name);
  		return NULL;
  	}
  
  	/*
  	 * LoadFile allows loading more than one assembly with the same name.
  	 * That means that just calling mono_assembly_load is unlikely to find
  	 * the correct assembly (it'll just return the first one loaded).  But
  	 * we shouldn't hardcode the full assembly filepath into the AOT image,
  	 * so it's not obvious that we can call mono_assembly_open_predicate.
  	 *
  	 * In the JIT, an assembly opened with LoadFile is supposed to only
  	 * refer to already-loaded assemblies (or to GAC & MONO_PATH)
  	 * assemblies - so nothing new should be loading.  And for the
  	 * LoadFile'd assembly itself, we can check if the name and guid of the
  	 * current AOT module matches the wanted name and guid and just return
  	 * the AOT module's assembly.
  	 */
  	if (!strcmp (amodule->assembly->image->guid, amodule->image_guids [index])) {
  		assembly = amodule->assembly;
  	} else if (mono_get_corlib () && !strcmp (mono_get_corlib ()->guid, amodule->image_guids [index])) {
  		/* This might be called before corlib is added to the root domain */
  		assembly = mono_get_corlib ()->assembly;
  	} else {
  		MonoAssemblyByNameRequest req;
  		mono_assembly_request_prepare_byname (&req, MONO_ASMCTX_DEFAULT, alc);
  		req.basedir = amodule->assembly->basedir;
  		assembly = mono_assembly_request_byname (&amodule->image_names [index], &req, &status);
  	}
  	if (!assembly) {
  		mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_AOT, "AOT: module %s is unusable because dependency %s is not found.", amodule->aot_name, amodule->image_names [index].name);
  		mono_error_set_bad_image_by_name (error, amodule->aot_name, "module '%s' is unusable because dependency %s is not found (error %d).\n", amodule->aot_name, amodule->image_names [index].name, status);
  		amodule->out_of_date = TRUE;
  		return NULL;
  	}
  
  	if (strcmp (assembly->image->guid, amodule->image_guids [index])) {
  		mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: module %s is unusable (GUID of dependent assembly %s doesn't match (expected '%s', got '%s')).", amodule->aot_name, amodule->image_names [index].name, amodule->image_guids [index], assembly->image->guid);
  		mono_error_set_bad_image_by_name (error, amodule->aot_name, "module '%s' is unusable (GUID of dependent assembly %s doesn't match (expected '%s', got '%s')).", amodule->aot_name, amodule->image_names [index].name, amodule->image_guids [index], assembly->image->guid);
  		amodule->out_of_date = TRUE;
  		return NULL;
  	}
  
  	amodule->image_table [index] = assembly->image;
  	return assembly->image;
  }
  
  static gint32
  decode_value (guint8 *ptr, guint8 **rptr)
  {
  	guint8 b = *ptr;
  	gint32 len;
  	
  	if ((b & 0x80) == 0){
  		len = b;
  		++ptr;
  	} else if ((b & 0x40) == 0){
  		len = ((b & 0x3f) << 8 | ptr [1]);
  		ptr += 2;
  	} else if (b != 0xff) {
  		len = ((b & 0x1f) << 24) |
  			(ptr [1] << 16) |
  			(ptr [2] << 8) |
  			ptr [3];
  		ptr += 4;
  	}
  	else {
  		len = (ptr [1] << 24) | (ptr [2] << 16) | (ptr [3] << 8) | ptr [4];
  		ptr += 5;
  	}
  	if (rptr)
  		*rptr = ptr;
  
  	//printf ("DECODE: %d.\n", len);
  	return len;
  }
  
  /*
   * mono_aot_get_offset:
   *
   *   Decode an offset table emitted by emit_offset_table (), returning the INDEXth
   * entry.
   */
  static guint32
  mono_aot_get_offset (guint32 *table, int index)
  {
  	int i, group, ngroups, index_entry_size;
  	int start_offset, offset, group_size;
  	guint8 *data_start, *p;
  	guint32 *index32 = NULL;
  	guint16 *index16 = NULL;
  	
  	/* noffsets = table [0]; */
  	group_size = table [1];
  	ngroups = table [2];
  	index_entry_size = table [3];
  	group = index / group_size;
  
  	if (index_entry_size == 2) {
  		index16 = (guint16*)&table [4];
  		data_start = (guint8*)&index16 [ngroups];
  		p = data_start + index16 [group];
  	} else {
  		index32 = (guint32*)&table [4];
  		data_start = (guint8*)&index32 [ngroups];
  		p = data_start + index32 [group];
  	}
  
  	/* offset will contain the value of offsets [group * group_size] */
  	offset = start_offset = decode_value (p, &p);
  	for (i = group * group_size + 1; i <= index; ++i) {
  		offset += decode_value (p, &p);
  	}
  
  	//printf ("Offset lookup: %d -> %d, start=%d, p=%d\n", index, offset, start_offset, table [3 + group]);
  
  	return offset;
  }
  
  static MonoMethod*
  decode_resolve_method_ref (MonoAotModule *module, guint8 *buf, guint8 **endbuf, MonoError *error);
  
  static MonoClass*
  decode_klass_ref (MonoAotModule *module, guint8 *buf, guint8 **endbuf, MonoError *error);
  
  static MonoType*
  decode_type (MonoAotModule *module, guint8 *buf, guint8 **endbuf, MonoError *error);
  
  static MonoGenericInst*
  decode_generic_inst (MonoAotModule *module, guint8 *buf, guint8 **endbuf, MonoError *error)
  {
  	int type_argc, i;
  	MonoType **type_argv;
  	MonoGenericInst *inst;
  	guint8 *p = buf;
  
  	error_init (error);
  	type_argc = decode_value (p, &p);
  	type_argv = g_new0 (MonoType*, type_argc);
  
  	for (i = 0; i < type_argc; ++i) {
  		MonoClass *pclass = decode_klass_ref (module, p, &p, error);
  		if (!pclass) {
  			g_free (type_argv);
  			return NULL;
  		}
  		type_argv [i] = m_class_get_byval_arg (pclass);
  	}
  
  	inst = mono_metadata_get_generic_inst (type_argc, type_argv);
  	g_free (type_argv);
  
  	*endbuf = p;
  
  	return inst;
  }
  
  static gboolean
  decode_generic_context (MonoAotModule *amodule, MonoGenericContext *ctx, guint8 *buf, guint8 **endbuf, MonoError *error)
  {
  	guint8 *p = buf;
  	guint8 *p2;
  	guint32 offset, flags;
  
  	/* Either the class_inst or method_inst offset */
  	flags = decode_value (p, &p);
  
  	if (flags & 1) {
  		offset = decode_value (p, &p);
  		p2 = amodule->blob + offset;
  		ctx->class_inst = decode_generic_inst (amodule, p2, &p2, error);
  		if (!ctx->class_inst)
  			return FALSE;
  	}
  	if (flags & 2) {
  		offset = decode_value (p, &p);
  		p2 = amodule->blob + offset;
  		ctx->method_inst = decode_generic_inst (amodule, p2, &p2, error);
  		if (!ctx->method_inst)
  			return FALSE;
  	}
  
  	*endbuf = p;
  	return TRUE;
  }
  
  static MonoClass*
  decode_klass_ref (MonoAotModule *module, guint8 *buf, guint8 **endbuf, MonoError *error)
  {
  	MonoImage *image;
  	MonoClass *klass = NULL, *eklass;
  	guint32 token, rank, idx;
  	guint8 *p = buf;
  	int reftype;
  
  	error_init (error);
  	reftype = decode_value (p, &p);
  	if (reftype == 0) {
  		*endbuf = p;
  		mono_error_set_bad_image_by_name (error, module->aot_name, "Decoding a null class ref: %s", module->aot_name);
  		return NULL;
  	}
  
  	switch (reftype) {
  	case MONO_AOT_TYPEREF_TYPEDEF_INDEX:
  		idx = decode_value (p, &p);
  		image = load_image (module, 0, error);
  		if (!image)
  			return NULL;
  		klass = mono_class_get_checked (image, MONO_TOKEN_TYPE_DEF + idx, error);
  		break;
  	case MONO_AOT_TYPEREF_TYPEDEF_INDEX_IMAGE:
  		idx = decode_value (p, &p);
  		image = load_image (module, decode_value (p, &p), error);
  		if (!image)
  			return NULL;
  		klass = mono_class_get_checked (image, MONO_TOKEN_TYPE_DEF + idx, error);
  		break;
  	case MONO_AOT_TYPEREF_TYPESPEC_TOKEN:
  		token = decode_value (p, &p);
  		image = module->assembly->image;
  		if (!image) {
  			mono_error_set_bad_image_by_name (error, module->aot_name, "No image associated with the aot module: %s", module->aot_name);
  			return NULL;
  		}
  		klass = mono_class_get_checked (image, token, error);
  		break;
  	case MONO_AOT_TYPEREF_GINST: {
  		MonoClass *gclass;
  		MonoGenericContext ctx;
  		MonoType *type;
  
  		gclass = decode_klass_ref (module, p, &p, error);
  		if (!gclass)
  			return NULL;
  		g_assert (mono_class_is_gtd (gclass));
  
  		memset (&ctx, 0, sizeof (ctx));
  		guint32 offset = decode_value (p, &p);
  		guint8 *p2 = module->blob + offset;
  		ctx.class_inst = decode_generic_inst (module, p2, &p2, error);
  		if (!ctx.class_inst)
  			return NULL;
  		type = mono_class_inflate_generic_type_checked (m_class_get_byval_arg (gclass), &ctx, error);
  		if (!type)
  			return NULL;
  		klass = mono_class_from_mono_type_internal (type);
  		mono_metadata_free_type (type);
  		break;
  	}
  	case MONO_AOT_TYPEREF_VAR: {
  		MonoType *t = NULL;
  		MonoGenericContainer *container = NULL;
  		gboolean has_constraint = decode_value (p, &p);
  
  		if (has_constraint) {
  			MonoClass *par_klass;
  			MonoType *gshared_constraint;
  
  			gshared_constraint = decode_type (module, p, &p, error);
  			if (!gshared_constraint)
  				return NULL;
  
  			par_klass = decode_klass_ref (module, p, &p, error);
  			if (!par_klass)
  				return NULL;
  
  			t = mini_get_shared_gparam (m_class_get_byval_arg (par_klass), gshared_constraint);
  			mono_metadata_free_type (gshared_constraint);
  			klass = mono_class_from_mono_type_internal (t);
  		} else {
  			int type = decode_value (p, &p);
  			int num = decode_value (p, &p);
  			gboolean is_not_anonymous = decode_value (p, &p);
  
  			if (is_not_anonymous) {
  				gboolean is_method = decode_value (p, &p);
  			
  				if (is_method) {
  					MonoMethod *method_def;
  					g_assert (type == MONO_TYPE_MVAR);
  					method_def = decode_resolve_method_ref (module, p, &p, error);
  					if (!method_def)
  						return NULL;
  
  					container = mono_method_get_generic_container (method_def);
  				} else {
  					MonoClass *class_def;
  					g_assert (type == MONO_TYPE_VAR);
  					class_def = decode_klass_ref (module, p, &p, error);
  					if (!class_def)
  						return NULL;
  
  					container = mono_class_try_get_generic_container (class_def); //FIXME is this a case for a try_get?
  				}
  			} else {
  				// We didn't decode is_method, so we have to infer it from type enum.
  				container = mono_get_anonymous_container_for_image (module->assembly->image, type == MONO_TYPE_MVAR);
  			}
  
  			t = g_new0 (MonoType, 1);
  			t->type = (MonoTypeEnum)type;
  			if (is_not_anonymous) {
  				t->data.generic_param = mono_generic_container_get_param (container, num);
  			} else {
  				/* Anonymous */
  				MonoGenericParam *par = mono_metadata_create_anon_gparam (module->assembly->image, num, type == MONO_TYPE_MVAR);
  				t->data.generic_param = par;
  				// FIXME: maybe do this for all anon gparams?
  				((MonoGenericParamFull*)par)->info.name = mono_make_generic_name_string (module->assembly->image, num);
  			}
  			// FIXME: Maybe use types directly to avoid
  			// the overhead of creating MonoClass-es
  			klass = mono_class_from_mono_type_internal (t);
  
  			g_free (t);
  		}
  		break;
  	}
  	case MONO_AOT_TYPEREF_ARRAY:
  		/* Array */
  		rank = decode_value (p, &p);
  		eklass = decode_klass_ref (module, p, &p, error);
  		if (!eklass)
  			return NULL;
  		klass = mono_class_create_array (eklass, rank);
  		break;
  	case MONO_AOT_TYPEREF_PTR: {
  		MonoType *t;
  
  		t = decode_type (module, p, &p, error);
  		if (!t)
  			return NULL;
  		klass = mono_class_from_mono_type_internal (t);
  		g_free (t);
  		break;
  	}
  	case MONO_AOT_TYPEREF_BLOB_INDEX: {
  		guint32 offset = decode_value (p, &p);
  		guint8 *p2;
  
  		p2 = module->blob + offset;
  		klass = decode_klass_ref (module, p2, &p2, error);
  		break;
  	}
  	default:
  		mono_error_set_bad_image_by_name (error, module->aot_name, "Invalid klass reftype %d: %s", reftype, module->aot_name);
  	}
  	//g_assert (klass);
  	//printf ("BLA: %s\n", mono_type_full_name (m_class_get_byval_arg (klass)));
  	*endbuf = p;
  	return klass;
  }
  
  static MonoClassField*
  decode_field_info (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
  {
  	ERROR_DECL (error);
  	MonoClass *klass = decode_klass_ref (module, buf, &buf, error);
  	guint32 token;
  	guint8 *p = buf;
  
  	if (!klass) {
  		mono_error_cleanup (error); /* FIXME don't swallow the error */
  		return NULL;
  	}
  
  	token = MONO_TOKEN_FIELD_DEF + decode_value (p, &p);
  
  	*endbuf = p;
  
  	return mono_class_get_field (klass, token);
  }
  
  /*
   * Parse a MonoType encoded by encode_type () in aot-compiler.c. Return malloc-ed
   * memory.
   */
  static MonoType*
  decode_type (MonoAotModule *module, guint8 *buf, guint8 **endbuf, MonoError *error)
  {
  	guint8 *p = buf;
  	MonoType *t;
  
  	if (*p == MONO_TYPE_CMOD_REQD) {
  		++p;
  
  		int count = decode_value (p, &p);
  
  		/* TODO: encode aggregate cmods differently than simple cmods and make it possible to use the more compact encoding here. */
  		t = (MonoType*)g_malloc0 (mono_sizeof_type_with_mods (count, TRUE));
  		mono_type_with_mods_init (t, count, TRUE);
  
  		/* Try not to blow up the stack. See comment on MONO_MAX_EXPECTED_CMODS */
  		g_assert (count < MONO_MAX_EXPECTED_CMODS);
  		MonoAggregateModContainer *cm = g_alloca (mono_sizeof_aggregate_modifiers (count));
  		cm->count = count;
  		for (int i = 0; i < count; ++i) {
  			MonoSingleCustomMod *cmod = &cm->modifiers [i];
  			cmod->required = decode_value (p, &p);
  			cmod->type = decode_type (module, p, &p, error);
  			goto_if_nok (error, fail);
  		}
  
  		mono_type_set_amods (t, mono_metadata_get_canonical_aggregate_modifiers (cm));
  		for (int i = 0; i < count; ++i)
  			mono_metadata_free_type (cm->modifiers [i].type);
  	} else {
  		t = (MonoType *) g_malloc0 (MONO_SIZEOF_TYPE);
  	}
  
  	while (TRUE) {
  		if (*p == MONO_TYPE_PINNED) {
  			t->pinned = TRUE;
  			++p;
  		} else if (*p == MONO_TYPE_BYREF) {
  			t->byref = TRUE;
  			++p;
  		} else {
  			break;
  		}
  	}
  
  	t->type = (MonoTypeEnum)*p;
  	++p;
  
  	switch (t->type) {
  	case MONO_TYPE_VOID:
  	case MONO_TYPE_BOOLEAN:
  	case MONO_TYPE_CHAR:
  	case MONO_TYPE_I1:
  	case MONO_TYPE_U1:
  	case MONO_TYPE_I2:
  	case MONO_TYPE_U2:
  	case MONO_TYPE_I4:
  	case MONO_TYPE_U4:
  	case MONO_TYPE_I8:
  	case MONO_TYPE_U8:
  	case MONO_TYPE_R4:
  	case MONO_TYPE_R8:
  	case MONO_TYPE_I:
  	case MONO_TYPE_U:
  	case MONO_TYPE_STRING:
  	case MONO_TYPE_OBJECT:
  	case MONO_TYPE_TYPEDBYREF:
  		break;
  	case MONO_TYPE_VALUETYPE:
  	case MONO_TYPE_CLASS:
  		t->data.klass = decode_klass_ref (module, p, &p, error);
  		if (!t->data.klass)
  			goto fail;
  		break;
  	case MONO_TYPE_SZARRAY:
  		t->data.klass = decode_klass_ref (module, p, &p, error);
  
  		if (!t->data.klass)
  			goto fail;
  		break;
  	case MONO_TYPE_PTR:
  		t->data.type = decode_type (module, p, &p, error);
  		if (!t->data.type)
  			goto fail;
  		break;
  	case MONO_TYPE_GENERICINST: {
  		MonoClass *gclass;
  		MonoGenericContext ctx;
  		MonoType *type;
  		MonoClass *klass;
  
  		gclass = decode_klass_ref (module, p, &p, error);
  		if (!gclass)
  			goto fail;
  		g_assert (mono_class_is_gtd (gclass));
  
  		memset (&ctx, 0, sizeof (ctx));
  		ctx.class_inst = decode_generic_inst (module, p, &p, error);
  		if (!ctx.class_inst)
  			goto fail;
  		type = mono_class_inflate_generic_type_checked (m_class_get_byval_arg (gclass), &ctx, error);
  		if (!type)
  			goto fail;
  		klass = mono_class_from_mono_type_internal (type);
  		t->data.generic_class = mono_class_get_generic_class (klass);
  		break;
  	}
  	case MONO_TYPE_ARRAY: {
  		MonoArrayType *array;
  		int i;
  
  		// FIXME: memory management
  		array = g_new0 (MonoArrayType, 1);
  		array->eklass = decode_klass_ref (module, p, &p, error);
  		if (!array->eklass)
  			goto fail;
  		array->rank = decode_value (p, &p);
  		array->numsizes = decode_value (p, &p);
  
  		if (array->numsizes)
  			array->sizes = (int *)g_malloc0 (sizeof (int) * array->numsizes);
  		for (i = 0; i < array->numsizes; ++i)
  			array->sizes [i] = decode_value (p, &p);
  
  		array->numlobounds = decode_value (p, &p);
  		if (array->numlobounds)
  			array->lobounds = (int *)g_malloc0 (sizeof (int) * array->numlobounds);
  		for (i = 0; i < array->numlobounds; ++i)
  			array->lobounds [i] = decode_value (p, &p);
  		t->data.array = array;
  		break;
  	}
  	case MONO_TYPE_VAR:
  	case MONO_TYPE_MVAR: {
  		MonoClass *klass = decode_klass_ref (module, p, &p, error);
  		if (!klass)
  			goto fail;
  		t->data.generic_param = m_class_get_byval_arg (klass)->data.generic_param;
  		break;
  	}
  	default:
  		mono_error_set_bad_image_by_name (error, module->aot_name, "Invalid encoded type %d: %s", t->type, module->aot_name);
  		goto fail;
  	}
  
  	*endbuf = p;
  
  	return t;
  fail:
  	g_free (t);
  	return NULL;
  }
  
  // FIXME: Error handling, memory management
  
  static MonoMethodSignature*
  decode_signature_with_target (MonoAotModule *module, MonoMethodSignature *target, guint8 *buf, guint8 **endbuf)
  {
  	ERROR_DECL (error);
  	MonoMethodSignature *sig;
  	guint32 flags;
  	int i, gen_param_count = 0, param_count, call_conv;
  	guint8 *p = buf;
  	gboolean hasthis, explicit_this, has_gen_params;
  
  	flags = *p;
  	p ++;
  	has_gen_params = (flags & 0x10) != 0;
  	hasthis = (flags & 0x20) != 0;
  	explicit_this = (flags & 0x40) != 0;
  	call_conv = flags & 0x0F;
  
  	if (has_gen_params)
  		gen_param_count = decode_value (p, &p);
  	param_count = decode_value (p, &p);
  	if (target && param_count != target->param_count)
  		return NULL;
  	sig = (MonoMethodSignature *)g_malloc0 (MONO_SIZEOF_METHOD_SIGNATURE + param_count * sizeof (MonoType *));
  	sig->param_count = param_count;
  	sig->sentinelpos = -1;
  	sig->hasthis = hasthis;
  	sig->explicit_this = explicit_this;
  	sig->call_convention = call_conv;
  	sig->generic_param_count = gen_param_count;
  	sig->ret = decode_type (module, p, &p, error);
  	if (!sig->ret)
  		goto fail;
  	for (i = 0; i < param_count; ++i) {
  		if (*p == MONO_TYPE_SENTINEL) {
  			g_assert (sig->call_convention == MONO_CALL_VARARG);
  			sig->sentinelpos = i;
  			p ++;
  		}
  		sig->params [i] = decode_type (module, p, &p, error);
  		if (!sig->params [i])
  			goto fail;
  	}
  
  	if (sig->call_convention == MONO_CALL_VARARG && sig->sentinelpos == -1)
  		sig->sentinelpos = sig->param_count;
  
  	*endbuf = p;
  
  	return sig;
  fail:
  	mono_error_cleanup (error); /* FIXME don't swallow the error */
  	g_free (sig);
  	return NULL;
  }
  
  static MonoMethodSignature*
  decode_signature (MonoAotModule *module, guint8 *buf, guint8 **endbuf)
  {
  	return decode_signature_with_target (module, NULL, buf, endbuf);
  }
  
  static gboolean
  sig_matches_target (MonoAotModule *module, MonoMethod *target, guint8 *buf, guint8 **endbuf)
  {
  	MonoMethodSignature *sig;
  	gboolean res;
  	guint8 *p = buf;
  	
  	sig = decode_signature_with_target (module, mono_method_signature_internal (target), p, &p);
  	res = sig && mono_metadata_signature_equal (mono_method_signature_internal (target), sig);
  	g_free (sig);
  	*endbuf = p;
  	return res;
  }
  
  /* Stores information returned by decode_method_ref () */
  typedef struct {
  	MonoImage *image;
  	guint32 token;
  	MonoMethod *method;
  	gboolean no_aot_trampoline;
  } MethodRef;
  
  /*
   * decode_method_ref_with_target:
   *
   *   Decode a method reference, storing the image/token into a MethodRef structure.
   * This avoids loading metadata for the method if the caller does not need it. If the method has
   * no token, then it is loaded from metadata and ref->method is set to the method instance.
   * If TARGET is non-NULL, abort decoding if it can be determined that the decoded method
   *  couldn't resolve to TARGET, and return FALSE.
   * There are some kinds of method references which only support a non-null TARGET.
   * This means that its not possible to decode this into a method, only to check
   * that the method reference matches a given method. This is normally not a problem
   * as these wrappers only occur in the extra_methods table, where we already have
   * a method we want to lookup.
   *
   * If there was a decoding error, we return FALSE and set @error
   */
  static gboolean
  decode_method_ref_with_target (MonoAotModule *module, MethodRef *ref, MonoMethod *target, guint8 *buf, guint8 **endbuf, MonoError *error)
  {
  	guint32 image_index, value;
  	MonoImage *image = NULL;
  	guint8 *p = buf;
  
  	memset (ref, 0, sizeof (MethodRef));
  	error_init (error);
  
  	value = decode_value (p, &p);
  	image_index = value >> 24;
  
  	if (image_index == MONO_AOT_METHODREF_NO_AOT_TRAMPOLINE) {
  		ref->no_aot_trampoline = TRUE;
  		value = decode_value (p, &p);
  		image_index = value >> 24;
  	}
  
  	if (image_index < MONO_AOT_METHODREF_MIN || image_index == MONO_AOT_METHODREF_METHODSPEC ||
  		image_index == MONO_AOT_METHODREF_GINST || image_index == MONO_AOT_METHODREF_BLOB_INDEX) {
  		if (target && target->wrapper_type) {
  			return FALSE;
  		}
  	}
  
  	if (image_index == MONO_AOT_METHODREF_WRAPPER) {
  		WrapperInfo *info;
  		guint32 wrapper_type;
  
  		wrapper_type = decode_value (p, &p);
  
  		if (target && target->wrapper_type != wrapper_type)
  			return FALSE;
  
  		/* Doesn't matter */
  		image = mono_defaults.corlib;
  
  		switch (wrapper_type) {
  #ifndef DISABLE_REMOTING
  		case MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK: {
  			MonoMethod *m = decode_resolve_method_ref (module, p, &p, error);
  			if (!m)
  				return FALSE;
  			mono_class_init_internal (m->klass);
  			if (mono_aot_only)
  				ref->method = m;
  			else {
  				ref->method = mono_marshal_get_remoting_invoke_with_check (m, error);
  				return_val_if_nok (error, FALSE);
  			}
  			break;
  		}
  		case MONO_WRAPPER_PROXY_ISINST: {
  			MonoClass *klass = decode_klass_ref (module, p, &p, error);
  			if (!klass)
  				return FALSE;
  			ref->method = mono_marshal_get_proxy_cancast (klass);
  			break;
  		}
  		case MONO_WRAPPER_LDFLD:
  		case MONO_WRAPPER_LDFLDA:
  		case MONO_WRAPPER_STFLD: {
  			MonoClass *klass = decode_klass_ref (module, p, &p, error);
  			if (!klass)
  				return FALSE;
  			MonoType *type = m_class_get_byval_arg (klass);
  			if (wrapper_type == MONO_WRAPPER_LDFLD)
  				ref->method = mono_marshal_get_ldfld_wrapper (type);
  			else if (wrapper_type == MONO_WRAPPER_LDFLDA)
  				ref->method = mono_marshal_get_ldflda_wrapper (type);
  			else if (wrapper_type == MONO_WRAPPER_STFLD)
  				ref->method = mono_marshal_get_stfld_wrapper (type);
  			else {
  				mono_error_set_bad_image_by_name (error, module->aot_name, "Unknown AOT wrapper type %d: %s", wrapper_type, module->aot_name);
  				return FALSE;
  			}
  			break;
  		}
  #endif
  		case MONO_WRAPPER_ALLOC: {
  			int atype = decode_value (p, &p);
  			ManagedAllocatorVariant variant =
  				mono_profiler_allocations_enabled () ?
  				MANAGED_ALLOCATOR_PROFILER : MANAGED_ALLOCATOR_REGULAR;
  
  			ref->method = mono_gc_get_managed_allocator_by_type (atype, variant);
  			/* Try to fallback to the slow path version */
  			if (!ref->method)
  				ref->method = mono_gc_get_managed_allocator_by_type (atype, MANAGED_ALLOCATOR_SLOW_PATH);
  			if (!ref->method) {
  				mono_error_set_bad_image_by_name (error, module->aot_name, "Error: No managed allocator, but we need one for AOT.\nAre you using non-standard GC options?\n%s\n", module->aot_name);
  				return FALSE;
  			}
  			break;
  		}
  		case MONO_WRAPPER_WRITE_BARRIER: {
  			ref->method = mono_gc_get_write_barrier ();
  			break;
  		}
  		case MONO_WRAPPER_STELEMREF: {
  			int subtype = decode_value (p, &p);
  
  			if (subtype == WRAPPER_SUBTYPE_NONE) {
  				ref->method = mono_marshal_get_stelemref ();
  			} else if (subtype == WRAPPER_SUBTYPE_VIRTUAL_STELEMREF) {
  				int kind;
  				
  				kind = decode_value (p, &p);
  
  				/* Can't decode this */
  				if (!target)
  					return FALSE;
  				if (target->wrapper_type == MONO_WRAPPER_STELEMREF) {
  					info = mono_marshal_get_wrapper_info (target);
  
  					g_assert (info);
  					if (info->subtype == subtype && info->d.virtual_stelemref.kind == kind)
  						ref->method = target;
  					else
  						return FALSE;
  				} else {
  					return FALSE;
  				}
  			} else {
  				mono_error_set_bad_image_by_name (error, module->aot_name, "Invalid STELEMREF subtype %d: %s", subtype, module->aot_name);
  				return FALSE;
  			}
  			break;
  		}
  		case MONO_WRAPPER_SYNCHRONIZED: {
  			MonoMethod *m = decode_resolve_method_ref (module, p, &p, error);
  			if (!m)
  				return FALSE;
  			ref->method = mono_marshal_get_synchronized_wrapper (m);
  			break;
  		}
  		case MONO_WRAPPER_OTHER: {
  			int subtype = decode_value (p, &p);
  
  			if (subtype == WRAPPER_SUBTYPE_PTR_TO_STRUCTURE || subtype == WRAPPER_SUBTYPE_STRUCTURE_TO_PTR) {
  				MonoClass *klass = decode_klass_ref (module, p, &p, error);
  				if (!klass)
  					return FALSE;
  
  				if (!target)
  					return FALSE;
  				if (klass != target->klass)
  					return FALSE;
  
  				if (subtype == WRAPPER_SUBTYPE_PTR_TO_STRUCTURE) {
  					if (strcmp (target->name, "PtrToStructure"))
  						return FALSE;
  					ref->method = mono_marshal_get_ptr_to_struct (klass);
  				} else {
  					if (strcmp (target->name, "StructureToPtr"))
  						return FALSE;
  					ref->method = mono_marshal_get_struct_to_ptr (klass);
  				}
  			} else if (subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
  				MonoMethod *m = decode_resolve_method_ref (module, p, &p, error);
  				if (!m)
  					return FALSE;
  				ref->method = mono_marshal_get_synchronized_inner_wrapper (m);
  			} else if (subtype == WRAPPER_SUBTYPE_ARRAY_ACCESSOR) {
  				MonoMethod *m = decode_resolve_method_ref (module, p, &p, error);
  				if (!m)
  					return FALSE;
  				ref->method = mono_marshal_get_array_accessor_wrapper (m);
  			} else if (subtype == WRAPPER_SUBTYPE_GSHAREDVT_IN) {
  				ref->method = mono_marshal_get_gsharedvt_in_wrapper ();
  			} else if (subtype == WRAPPER_SUBTYPE_GSHAREDVT_OUT) {
  				ref->method = mono_marshal_get_gsharedvt_out_wrapper ();
  			} else if (subtype == WRAPPER_SUBTYPE_INTERP_IN) {
  				MonoMethodSignature *sig = decode_signature (module, p, &p);
  				if (!sig)
  					return FALSE;
  				ref->method = mini_get_interp_in_wrapper (sig);
  				g_free (sig);
  			} else if (subtype == WRAPPER_SUBTYPE_INTERP_LMF) {
  				MonoJitICallInfo *info = mono_find_jit_icall_info ((MonoJitICallId)decode_value (p, &p));
  				ref->method = mini_get_interp_lmf_wrapper (info->name, (gpointer) info->func);
  			} else if (subtype == WRAPPER_SUBTYPE_GSHAREDVT_IN_SIG) {
  				MonoMethodSignature *sig = decode_signature (module, p, &p);
  				if (!sig)
  					return FALSE;
  				ref->method = mini_get_gsharedvt_in_sig_wrapper (sig);
  				g_free (sig);
  			} else if (subtype == WRAPPER_SUBTYPE_GSHAREDVT_OUT_SIG) {
  				MonoMethodSignature *sig = decode_signature (module, p, &p);
  				if (!sig)
  					return FALSE;
  				ref->method = mini_get_gsharedvt_out_sig_wrapper (sig);
  				g_free (sig);
  			} else if (subtype == WRAPPER_SUBTYPE_AOT_INIT) {
  				guint32 init_type = decode_value (p, &p);
  				ref->method = mono_marshal_get_aot_init_wrapper ((MonoAotInitSubtype) init_type);
  			} else if (subtype == WRAPPER_SUBTYPE_LLVM_FUNC) {
  				guint32 init_type = decode_value (p, &p);
  				ref->method = mono_marshal_get_llvm_func_wrapper ((MonoLLVMFuncWrapperSubtype) init_type);
  			} else {
  				mono_error_set_bad_image_by_name (error, module->aot_name, "Invalid UNKNOWN wrapper subtype %d: %s", subtype, module->aot_name);
  				return FALSE;
  			}
  			break;
  		}
  		case MONO_WRAPPER_MANAGED_TO_MANAGED: {
  			int subtype = decode_value (p, &p);
  
  			if (subtype == WRAPPER_SUBTYPE_ELEMENT_ADDR) {
  				int rank = decode_value (p, &p);
  				int elem_size = decode_value (p, &p);
  
  				ref->method = mono_marshal_get_array_address (rank, elem_size);
  			} else if (subtype == WRAPPER_SUBTYPE_STRING_CTOR) {
  				MonoMethod *m;
  
  				m = decode_resolve_method_ref (module, p, &p, error);
  				if (!m)
  					return FALSE;
  
  				if (!target)
  					return FALSE;
  				g_assert (target->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED);
  
  				info = mono_marshal_get_wrapper_info (target);
  				if (info && info->subtype == subtype && info->d.string_ctor.method == m)
  					ref->method = target;
  				else
  					return FALSE;
  			}
  			break;
  		}
  		case MONO_WRAPPER_MANAGED_TO_NATIVE: {
  			MonoMethod *m;
  			int subtype = decode_value (p, &p);
  
  			if (subtype == WRAPPER_SUBTYPE_ICALL_WRAPPER) {
  				MonoJitICallInfo *info = mono_find_jit_icall_info ((MonoJitICallId)decode_value (p, &p));
  				ref->method = mono_icall_get_wrapper_method (info);
  			} else {
  				m = decode_resolve_method_ref (module, p, &p, error);
  				if (!m)
  					return FALSE;
  
  				/* This should only happen when looking for an extra method */
  				if (!target)
  					return FALSE;
  				if (mono_marshal_method_from_wrapper (target) == m)
  					ref->method = target;
  				else
  					return FALSE;
  			}
  			break;
  		}
  		case MONO_WRAPPER_CASTCLASS: {
  			int subtype = decode_value (p, &p);
  
  			if (subtype == WRAPPER_SUBTYPE_CASTCLASS_WITH_CACHE)
  				ref->method = mono_marshal_get_castclass_with_cache ();
  			else if (subtype == WRAPPER_SUBTYPE_ISINST_WITH_CACHE)
  				ref->method = mono_marshal_get_isinst_with_cache ();
  			else {
  				mono_error_set_bad_image_by_name (error, module->aot_name, "Invalid CASTCLASS wrapper subtype %d: %s", subtype, module->aot_name);
  				return FALSE;
  			}
  			break;
  		}
  		case MONO_WRAPPER_RUNTIME_INVOKE: {
  			int subtype = decode_value (p, &p);
  
  			if (!target)
  				return FALSE;
  
  			if (subtype == WRAPPER_SUBTYPE_RUNTIME_INVOKE_DYNAMIC) {
  				if (strcmp (target->name, "runtime_invoke_dynamic") != 0)
  					return FALSE;
  				ref->method = target;
  			} else if (subtype == WRAPPER_SUBTYPE_RUNTIME_INVOKE_DIRECT) {
  				/* Direct wrapper */
  				MonoMethod *m = decode_resolve_method_ref (module, p, &p, error);
  				if (!m)
  					return FALSE;
  				ref->method = mono_marshal_get_runtime_invoke (m, FALSE);
  			} else if (subtype == WRAPPER_SUBTYPE_RUNTIME_INVOKE_VIRTUAL) {
  				/* Virtual direct wrapper */
  				MonoMethod *m = decode_resolve_method_ref (module, p, &p, error);
  				if (!m)
  					return FALSE;
  				ref->method = mono_marshal_get_runtime_invoke (m, TRUE);
  			} else {
  				MonoMethodSignature *sig;
  
  				sig = decode_signature_with_target (module, NULL, p, &p);
  				info = mono_marshal_get_wrapper_info (target);
  				g_assert (info);
  
  				if (info->subtype != subtype) {
  					g_free (sig);
  					return FALSE;
  				}
  				g_assert (info->d.runtime_invoke.sig);
  				const gboolean same_sig = mono_metadata_signature_equal (sig, info->d.runtime_invoke.sig);
  				g_free (sig);
  				if (same_sig)
  					ref->method = target;
  				else
  					return FALSE;
  			}
  			break;
  		}
  		case MONO_WRAPPER_DELEGATE_INVOKE:
  		case MONO_WRAPPER_DELEGATE_BEGIN_INVOKE:
  		case MONO_WRAPPER_DELEGATE_END_INVOKE: {
  			gboolean is_inflated = decode_value (p, &p);
  			WrapperSubtype subtype;
  
  			if (is_inflated) {
  				MonoClass *klass;
  				MonoMethod *invoke, *wrapper;
  
  				klass = decode_klass_ref (module, p, &p, error);
  				if (!klass)
  					return FALSE;
  
  				switch (wrapper_type) {
  				case MONO_WRAPPER_DELEGATE_INVOKE:
  					invoke = mono_get_delegate_invoke_internal (klass);
  					wrapper = mono_marshal_get_delegate_invoke (invoke, NULL);
  					break;
  				case MONO_WRAPPER_DELEGATE_BEGIN_INVOKE:
  					invoke = mono_get_delegate_begin_invoke_internal (klass);
  					wrapper = mono_marshal_get_delegate_begin_invoke (invoke);
  					break;
  				case MONO_WRAPPER_DELEGATE_END_INVOKE:
  					invoke = mono_get_delegate_end_invoke_internal (klass);
  					wrapper = mono_marshal_get_delegate_end_invoke (invoke);
  					break;
  				default:
  					g_assert_not_reached ();
  					break;
  				}
  				if (target) {
  					/*
  					 * Due to the way mini_get_shared_method_full () works, we could end up with
  					 * multiple copies of the same wrapper.
  					 */
  					if (wrapper->klass != target->klass)
  						return FALSE;
  					ref->method = target;
  				} else {
  					ref->method = wrapper;
  				}
  			} else {
  				/*
  				 * These wrappers are associated with a signature, not with a method.
  				 * Since we can't decode them into methods, they need a target method.
  				 */
  				if (!target)
  					return FALSE;
  
  				if (wrapper_type == MONO_WRAPPER_DELEGATE_INVOKE) {
  					subtype = (WrapperSubtype)decode_value (p, &p);
  					info = mono_marshal_get_wrapper_info (target);
  					if (info) {
  						if (info->subtype != subtype)
  							return FALSE;
  					} else {
  						if (subtype != WRAPPER_SUBTYPE_NONE)
  							return FALSE;
  					}
  				}
  				if (sig_matches_target (module, target, p, &p))
  					ref->method = target;
  				else
  					return FALSE;
  			}
  			break;
  		}
  		case MONO_WRAPPER_NATIVE_TO_MANAGED: {
  			MonoMethod *m;
  			MonoClass *klass;
  
  			m = decode_resolve_method_ref (module, p, &p, error);
  			if (!m)
  				return FALSE;
  			klass = decode_klass_ref (module, p, &p, error);
  			if (!klass)
  				return FALSE;
  			ref->method = mono_marshal_get_managed_wrapper (m, klass, 0, error);
  			if (!is_ok (error))
  				return FALSE;
  			break;
  		}
  		default:
  			g_assert_not_reached ();
  		}
  	} else if (image_index == MONO_AOT_METHODREF_METHODSPEC) {
  		image_index = decode_value (p, &p);
  		ref->token = decode_value (p, &p);
  
  		image = load_image (module, image_index, error);
  		if (!image)
  			return FALSE;
  	} else if (image_index == MONO_AOT_METHODREF_BLOB_INDEX) {
  		guint32 offset = decode_value (p, &p);
  
  		guint8 *p2;
  
  		p2 = module->blob + offset;
  		if (!decode_method_ref_with_target (module, ref, target, p2, &p2, error))
  			return FALSE;
  		image = ref->image;
  		if (!image)
  			return FALSE;
  	} else if (image_index == MONO_AOT_METHODREF_GINST) {
  		MonoClass *klass;
  		MonoGenericContext ctx;
  		guint32 token_index;
  
  		/* 
  		 * These methods do not have a token which resolves them, so we 
  		 * resolve them immediately.
  		 */
  		klass = decode_klass_ref (module, p, &p, error);
  		if (!klass)
  			return FALSE;
  
  		if (target && target->klass != klass)
  			return FALSE;
  
  		image_index = decode_value (p, &p);
  		token_index = decode_value (p, &p);
  		ref->token = mono_metadata_make_token (MONO_TABLE_METHOD, token_index);
  
  		image = load_image (module, image_index, error);
  		if (!image)
  			return FALSE;
  
  		ref->method = mono_get_method_checked (image, ref->token, NULL, NULL, error);
  		if (!ref->method)
  			return FALSE;
  
  		memset (&ctx, 0, sizeof (ctx));
  
  		if (FALSE && mono_class_is_ginst (klass)) {
  			ctx.class_inst = mono_class_get_generic_class (klass)->context.class_inst;
  			ctx.method_inst = NULL;
   
  			ref->method = mono_class_inflate_generic_method_full_checked (ref->method, klass, &ctx, error);
  			if (!ref->method)
  				return FALSE;
  		}			
  
  		memset (&ctx, 0, sizeof (ctx));
  
  		if (!decode_generic_context (module, &ctx, p, &p, error))
  			return FALSE;
  
  		ref->method = mono_class_inflate_generic_method_full_checked (ref->method, klass, &ctx, error);
  		if (!ref->method)
  			return FALSE;
  
  	} else if (image_index == MONO_AOT_METHODREF_ARRAY) {
  		MonoClass *klass;
  		int method_type;
  
  		klass = decode_klass_ref (module, p, &p, error);
  		if (!klass)
  			return FALSE;
  		method_type = decode_value (p, &p);
  		switch (method_type) {
  		case 0:
  			ref->method = mono_class_get_method_from_name_checked (klass, ".ctor", m_class_get_rank (klass), 0, error);
  			return_val_if_nok (error, FALSE);
  			break;
  		case 1:
  			ref->method = mono_class_get_method_from_name_checked (klass, ".ctor", m_class_get_rank (klass) * 2, 0, error);
  			return_val_if_nok (error, FALSE);
  			break;
  		case 2:
  			ref->method = mono_class_get_method_from_name_checked (klass, "Get", -1, 0, error);
  			return_val_if_nok (error, FALSE);
  			break;
  		case 3:
  			ref->method = mono_class_get_method_from_name_checked (klass, "Address", -1, 0, error);
  			return_val_if_nok (error, FALSE);
  			break;
  		case 4:
  			ref->method = mono_class_get_method_from_name_checked (klass, "Set", -1, 0, error);
  			return_val_if_nok (error, FALSE);
  			break;
  		default:
  			mono_error_set_bad_image_by_name (error, module->aot_name, "Invalid METHODREF_ARRAY method type %d: %s", method_type, module->aot_name);
  			return FALSE;
  		}
  	} else {
  		if (image_index == MONO_AOT_METHODREF_LARGE_IMAGE_INDEX) {
  			image_index = decode_value (p, &p);
  			value = decode_value (p, &p);
  		}
  
  		ref->token = MONO_TOKEN_METHOD_DEF | (value & 0xffffff);
  
  		image = load_image (module, image_index, error);
  		if (!image)
  			return FALSE;
  	}
  
  	*endbuf = p;
  
  	ref->image = image;
  
  	return TRUE;
  }
  
  static gboolean
  decode_method_ref (MonoAotModule *module, MethodRef *ref, guint8 *buf, guint8 **endbuf, MonoError *error)
  {
  	return decode_method_ref_with_target (module, ref, NULL, buf, endbuf, error);
  }
  
  /*
   * decode_resolve_method_ref_with_target:
   *
   *   Similar to decode_method_ref, but resolve and return the method itself.
   */
  static MonoMethod*
  decode_resolve_method_ref_with_target (MonoAotModule *module, MonoMethod *target, guint8 *buf, guint8 **endbuf, MonoError *error)
  {
  	MethodRef ref;
  
  	error_init (error);
  
  	if (!decode_method_ref_with_target (module, &ref, target, buf, endbuf, error))
  		return NULL;
  	if (ref.method)
  		return ref.method;
  	if (!ref.image) {
  		mono_error_set_bad_image_by_name (error, module->aot_name, "No image found for methodref with target: %s", module->aot_name);
  		return NULL;
  	}
  	return mono_get_method_checked (ref.image, ref.token, NULL, NULL, error);
  }
  
  static MonoMethod*
  decode_resolve_method_ref (MonoAotModule *module, guint8 *buf, guint8 **endbuf, MonoError *error)
  {
  	return decode_resolve_method_ref_with_target (module, NULL, buf, endbuf, error);
  }
  
  #ifdef ENABLE_AOT_CACHE
  
  /* AOT CACHE */
  
  /*
   * FIXME:
   * - Add options for controlling the cache size
   * - Handle full cache by deleting old assemblies lru style
   * - Maybe add a threshold after an assembly is AOT compiled
   * - Add options for enabling this for specific main assemblies
   */
  
  /* The cache directory */
  static char *cache_dir;
  
  /* The number of assemblies AOTed in this run */
  static int cache_count;
  
  /* Whenever to AOT in-process */
  static gboolean in_process;
  
  static void
  collect_assemblies (gpointer data, gpointer user_data)
  {
  	MonoAssembly *ass = (MonoAssembly*)data;
  	GSList **l = (GSList**)user_data;
  
  	*l = g_slist_prepend (*l, ass);
  }
  
  #define SHA1_DIGEST_LENGTH 20
  
  /*
   * get_aot_config_hash:
   *
   *   Return a hash for all the version information an AOT module depends on.
   */
  static G_GNUC_UNUSED char*
  get_aot_config_hash (MonoAssembly *assembly)
  {
  	char *build_info;
  	GSList *l, *assembly_list = NULL;
  	GString *s;
  	int i;
  	guint8 digest [SHA1_DIGEST_LENGTH];
  	char *digest_str;
  
  	build_info = mono_get_runtime_build_info ();
  
  	s = g_string_new (build_info);
  
  	mono_assembly_foreach (collect_assemblies, &assembly_list);
  
  	/*
  	 * The assembly list includes the current assembly as well, no need
  	 * to add it.
  	 */
  	for (l = assembly_list; l; l = l->next) {
  		MonoAssembly *ass = (MonoAssembly*)l->data;
  
  		g_string_append (s, "_");
  		g_string_append (s, ass->aname.name);
  		g_string_append (s, "_");
  		g_string_append (s, ass->image->guid);
  	}
  
  	for (i = 0; i < s->len; ++i) {
  		if (!isalnum (s->str [i]) && s->str [i] != '-')
  			s->str [i] = '_';
  	}
  
  	mono_sha1_get_digest ((guint8*)s->str, s->len, digest);
  
  	digest_str = g_malloc0 ((SHA1_DIGEST_LENGTH * 2) + 1);
  	for (i = 0; i < SHA1_DIGEST_LENGTH; ++i)
  		sprintf (digest_str + (i * 2), "%02x", digest [i]);
  
  	mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT: file dependencies: %s, hash %s", s->str, digest_str);
  
  	g_string_free (s, TRUE);
  
  	return digest_str;
  }
  
  static void
  aot_cache_init (void)
  {
  	if (mono_aot_only)
  		return;
  	enable_aot_cache = TRUE;
  	in_process = TRUE;
  }
  
  /*
   * aot_cache_load_module:
   *
   *   Load the AOT image corresponding to ASSEMBLY from the aot cache, AOTing it if neccessary.
   */
  static MonoDl*
  aot_cache_load_module (MonoAssembly *assembly, char **aot_name)
  {
  	MonoAotCacheConfig *config;
  	GSList *l;
  	char *fname, *tmp2, *aot_options, *failure_fname;
  	const char *home;
  	MonoDl *module;
  	gboolean res;
  	gint exit_status;
  	char *hash;
  	int pid;
  	gboolean enabled;
  	FILE *failure_file;
  
  	*aot_name = NULL;
  
  	if (image_is_dynamic (assembly->image))
  		return NULL;
  
  	/* Check in the list of assemblies enabled for aot caching */
  	config = mono_get_aot_cache_config ();
  
  	enabled = FALSE;
  	if (config->apps) {
  		MonoDomain *domain = mono_domain_get ();
  		MonoAssembly *entry_assembly = domain->entry_assembly;
  
  		// FIXME: This cannot be used for mscorlib during startup, since entry_assembly is not set yet
  		for (l = config->apps; l; l = l->next) {
  			char *n = (char*)l->data;
  
  			if ((entry_assembly && !strcmp (entry_assembly->aname.name, n)) || (!entry_assembly && !strcmp (assembly->aname.name, n)))
  				break;
  		}
  		if (l)
  			enabled = TRUE;
  	}
  
  	if (!enabled) {
  		for (l = config->assemblies; l; l = l->next) {
  			char *n = (char*)l->data;
  
  			if (!strcmp (assembly->aname.name, n))
  				break;
  		}
  		if (l)
  			enabled = TRUE;
  	}
  	if (!enabled)
  		return NULL;
  
  	if (!cache_dir) {
  		home = g_get_home_dir ();
  		if (!home)
  			return NULL;
  		cache_dir = g_strdup_printf ("%s/Library/Caches/mono/aot-cache", home);
  		if (!g_file_test (cache_dir, (GFileTest)(G_FILE_TEST_EXISTS|G_FILE_TEST_IS_DIR)))
  			g_mkdir_with_parents (cache_dir, 0777);
  	}
  
  	/*
  	 * The same assembly can be used in multiple configurations, i.e. multiple
       * versions of the runtime, with multiple versions of dependent assemblies etc.
  	 * To handle this, we compute a version string containing all this information, hash it,
  	 * and use the hash as a filename suffix.
  	 */
  	hash = get_aot_config_hash (assembly);
  
  	tmp2 = g_strdup_printf ("%s-%s%s", assembly->image->assembly_name, hash, MONO_SOLIB_EXT);
  	fname = g_build_filename (cache_dir, tmp2, (const char*)NULL);
  	*aot_name = fname;
  	g_free (tmp2);
  
  	mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: loading from cache: '%s'.", fname);
  	module = mono_dl_open (fname, MONO_DL_LAZY, NULL);
  
  	if (module) {
  		mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: found in cache: '%s'.", fname);
  		return module;
  	}
  
  	if (mono_is_corlib_image (assembly->image) && !mscorlib_aot_loaded)
  		/*
  		 * Can't AOT this during startup, so we AOT it when called later from
  		 * mono_aot_get_method ().
  		 */
  		return NULL;
  
  	mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: not found.");
  
  	/* Only AOT one assembly per run to avoid slowing down execution too much */
  	if (cache_count > 0)
  		return NULL;
  	cache_count ++;
  
  	/* Check for previous failure */
  	failure_fname = g_strdup_printf ("%s.failure", fname);
  	failure_file = fopen (failure_fname, "r");
  	if (failure_file) {
  		mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT: assembly '%s' previously failed to compile '%s' ('%s')... ", assembly->image->name, fname, failure_fname);
  		g_free (failure_fname);
  		return NULL;
  	} else {
  		g_free (failure_fname);
  		fclose (failure_file);
  	}
  
  	mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT: compiling assembly '%s', logfile: '%s.log'... ", assembly->image->name, fname);
  
  	/*
  	 * We need to invoke the AOT compiler here. There are multiple approaches:
  	 * - spawn a new runtime process. This can be hard when running with mkbundle, and
  	 * its hard to make the new process load the same set of assemblies.
  	 * - doing it in-process. This exposes the current process to bugs/leaks/side effects of
  	 * the AOT compiler.
  	 * - fork a new process and do the work there.
  	 */
  	if (in_process) {
  		aot_options = g_strdup_printf ("outfile=%s,internal-logfile=%s.log%s%s", fname, fname, config->aot_options ? "," : "", config->aot_options ? config->aot_options : "");
  		/* Maybe due this in another thread ? */
  		res = mono_compile_assembly (assembly, mono_parse_default_optimizations (NULL), aot_options, NULL);
  		if (res) {
  			mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT: compilation failed.");
  			failure_fname = g_strdup_printf ("%s.failure", fname);
  			failure_file = fopen (failure_fname, "a+");
  			fclose (failure_file);
  			g_free (failure_fname);
  		} else {
  			mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT: compilation succeeded.");
  		}
  	} else {
  		/*
  		 * - Avoid waiting for the aot process to finish ?
  		 *   (less overhead, but multiple processes could aot the same assembly at the same time)
  		 */
  		pid = fork ();
  		if (pid == 0) {
  			FILE *logfile;
  			char *logfile_name;
  
  			/* Child */
  
  			logfile_name = g_strdup_printf ("%s/aot.log", cache_dir);
  			logfile = fopen (logfile_name, "a+");
  			g_free (logfile_name);
  
  			dup2 (fileno (logfile), 1);
  			dup2 (fileno (logfile), 2);
  
  			aot_options = g_strdup_printf ("outfile=%s", fname);
  			res = mono_compile_assembly (assembly, mono_parse_default_optimizations (NULL), aot_options, NULL);
  			if (!res) {
  				exit (1);
  			} else {
  				exit (0);
  			}
  		} else {
  			/* Parent */
  			waitpid (pid, &exit_status, 0);
  			if (!WIFEXITED (exit_status) && (WEXITSTATUS (exit_status) == 0))
  				mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT: failed.");
  			else
  				mono_trace (G_LOG_LEVEL_MESSAGE, MONO_TRACE_AOT, "AOT: succeeded.");
  		}
  	}
  
  	module = mono_dl_open (fname, MONO_DL_LAZY, NULL);
  
  	return module;
  }
  
  #else
  
  static void
  aot_cache_init (void)
  {
  }
  
  static MonoDl*
  aot_cache_load_module (MonoAssembly *assembly, char **aot_name)
  {
  	return NULL;
  }
  
  #endif
  
  static void
  find_symbol (MonoDl *module, gpointer *globals, const char *name, gpointer *value)
  {
  	if (globals) {
  		int global_index;
  		guint16 *table, *entry;
  		guint16 table_size;
  		guint32 hash;		
  		char *symbol = (char*)name;
  
  #ifdef TARGET_MACH
  		symbol = g_strdup_printf ("_%s", name);
  #endif
  
  		/* The first entry points to the hash */
  		table = (guint16 *)globals [0];
  		globals ++;
  
  		table_size = table [0];
  		table ++;
  
  		hash = mono_metadata_str_hash (symbol) % table_size;
  
  		entry = &table [hash * 2];
  
  		/* Search the hash for the index into the globals table */
  		global_index = -1;
  		while (entry [0] != 0) {
  			guint32 index = entry [0] - 1;
  			guint32 next = entry [1];
  
  			//printf ("X: %s %s\n", (char*)globals [index * 2], name);
  
  			if (!strcmp ((const char*)globals [index * 2], symbol)) {
  				global_index = index;
  				break;
  			}
  
  			if (next != 0) {
  				entry = &table [next * 2];
  			} else {
  				break;
  			}
  		}
  
  		if (global_index != -1)
  			*value = globals [global_index * 2 + 1];
  		else
  			*value = NULL;
  
  		if (symbol != name)
  			g_free (symbol);
  	} else {
  		char *err = mono_dl_symbol (module, name, value);
  
  		if (err)
  			g_free (err);
  	}
  }
  
  static void
  find_amodule_symbol (MonoAotModule *amodule, const char *name, gpointer *value)
  {
  	g_assert (!(amodule->info.flags & MONO_AOT_FILE_FLAG_LLVM_ONLY));
  
  	find_symbol (amodule->sofile, amodule->globals, name, value);
  }
  
  void
  mono_install_load_aot_data_hook (MonoLoadAotDataFunc load_func, MonoFreeAotDataFunc free_func, gpointer user_data)
  {
  	aot_data_load_func = load_func;
  	aot_data_free_func = free_func;
  	aot_data_func_user_data = user_data;
  }
  
  /* Load the separate aot data file for ASSEMBLY */
  static guint8*
  open_aot_data (MonoAssembly *assembly, MonoAotFileInfo *info, void **ret_handle)
  {
  	MonoFileMap *map;
  	char *filename;
  	guint8 *data;
  
  	if (aot_data_load_func) {
  		data = aot_data_load_func (assembly, info->datafile_size, aot_data_func_user_data, ret_handle);
  		g_assert (data);
  		return data;
  	}
  
  	/*
  	 * Use <assembly name>.aotdata as the default implementation if no callback is given
  	 */
  	filename = g_strdup_printf ("%s.aotdata", assembly->image->name);
  	map = mono_file_map_open (filename);
  	g_assert (map);
  	data = (guint8*)mono_file_map (info->datafile_size, MONO_MMAP_READ, mono_file_map_fd (map), 0, ret_handle);
  	g_assert (data);
  
  	return data;
  }
  
  static gboolean
  check_usable (MonoAssembly *assembly, MonoAotFileInfo *info, guint8 *blob, char **out_msg)
  {
  	char *build_info;
  	char *msg = NULL;
  	gboolean usable = TRUE;
  	gboolean full_aot, interp, safepoints;
  	guint32 excluded_cpu_optimizations;
  
  	if (strcmp (assembly->image->guid, (const char*)info->assembly_guid)) {
  		msg = g_strdup ("doesn't match assembly");
  		usable = FALSE;
  	}
  
  	build_info = mono_get_runtime_build_info ();
  	if (strlen ((const char *)info->runtime_version) > 0 && strcmp (info->runtime_version, build_info)) {
  		msg = g_strdup_printf ("compiled against runtime version '%s' while this runtime has version '%s'", info->runtime_version, build_info);
  		usable = FALSE;
  	}
  	g_free (build_info);
  
  	full_aot = info->flags & MONO_AOT_FILE_FLAG_FULL_AOT;
  	interp = info->flags & MONO_AOT_FILE_FLAG_INTERP;
  
  	if (mono_aot_only && !full_aot) {
  		if (!interp) {
  			msg = g_strdup ("not compiled with --aot=full");
  			usable = FALSE;
  		}
  	}
  	if (!mono_aot_only && full_aot) {
  		msg = g_strdup ("compiled with --aot=full");
  		usable = FALSE;
  	}
  	if (mono_use_interpreter && !interp && !strcmp (assembly->aname.name, "mscorlib")) {
  		/* mscorlib contains necessary interpreter trampolines */
  		msg = g_strdup ("not compiled with --aot=interp");
  		usable = FALSE;
  	}
  	if (mono_llvm_only && !(info->flags & MONO_AOT_FILE_FLAG_LLVM_ONLY)) {
  		msg = g_strdup ("not compiled with --aot=llvmonly");
  		usable = FALSE;
  	}
  	if (mono_use_llvm && !(info->flags & MONO_AOT_FILE_FLAG_WITH_LLVM)) {
  		/* Prefer LLVM JITted code when using --llvm */
  		msg = g_strdup ("not compiled with --aot=llvm");
  		usable = FALSE;
  	}
  	if (mini_debug_options.mdb_optimizations && !(info->flags & MONO_AOT_FILE_FLAG_DEBUG) && !full_aot && !interp) {
  		msg = g_strdup ("not compiled for debugging");
  		usable = FALSE;
  	}
  
  	mono_arch_cpu_optimizations (&excluded_cpu_optimizations);
  	if (info->opts & excluded_cpu_optimizations) {
  		msg = g_strdup ("compiled with unsupported CPU optimizations");
  		usable = FALSE;
  	}
  
  	if (info->gc_name_index != -1) {
  		char *gc_name = (char*)&blob [info->gc_name_index];
  		const char *current_gc_name = mono_gc_get_gc_name ();
  
  		if (strcmp (current_gc_name, gc_name) != 0) {
  			msg = g_strdup_printf ("compiled against GC %s, while the current runtime uses GC %s.\n", gc_name, current_gc_name);
  			usable = FALSE;
  		}
  	}
  
  	safepoints = info->flags & MONO_AOT_FILE_FLAG_SAFEPOINTS;
  
  	if (!safepoints && mono_threads_are_safepoints_enabled ()) {
  		msg = g_strdup ("not compiled with safepoints");
  		usable = FALSE;
  	}
  
  #ifdef MONO_ARCH_CODE_EXEC_ONLY
  	if (!(info->flags & MONO_AOT_FILE_FLAG_CODE_EXEC_ONLY)) {
  		msg = g_strdup ("not compiled targeting a runtime configured as CODE_EXEC_ONLY");
  		usable = FALSE;
  	}
  #else
  	if (info->flags & MONO_AOT_FILE_FLAG_CODE_EXEC_ONLY) {
  		msg = g_strdup ("compiled targeting a runtime configured as CODE_EXEC_ONLY");
  		usable = FALSE;
  	}
  #endif
  
  	*out_msg = msg;
  	return usable;
  }
  
  /*
   * TABLE should point to a table of call instructions. Return the address called by the INDEXth entry.
   */
  static void*
  get_call_table_entry (void *table, int index, int entry_size)
  {
  #if defined(TARGET_ARM)
  	guint32 *ins_addr;
  	guint32 ins;
  	gint32 offset;
  
  	if (entry_size == 8) {
  		ins_addr = (guint32 *)table + (index * 2);
  		g_assert ((guint32) *ins_addr == (guint32 ) 0xe51ff004); // ldr pc, =<label>
  		return *((char **) (ins_addr + 1));
  	}
  
  	g_assert (entry_size == 4);
  	ins_addr = (guint32*)table + index;
  	ins = *ins_addr;
  	if ((ins >> ARMCOND_SHIFT) == ARMCOND_NV) {
  		/* blx */
  		offset = (((int)(((ins & 0xffffff) << 1) | ((ins >> 24) & 0x1))) << 7) >> 7;
  		return (char*)ins_addr + (offset * 2) + 8 + 1;
  	} else {
  		g_assert ((ins >> ARMCOND_SHIFT) == ARMCOND_AL);
  		/* bl */
  		offset = (((int)ins & 0xffffff) << 8) >> 8;
  		return (char*)ins_addr + (offset * 4) + 8;
  	}
  #elif defined(TARGET_ARM64)
  	return mono_arch_get_call_target ((guint8*)table + (index * 4) + 4);
  #elif defined(TARGET_X86) || defined(TARGET_AMD64)
  	/* The callee expects an ip which points after the call */
  	return mono_arch_get_call_target ((guint8*)table + (index * 5) + 5);
  #else
  	g_assert_not_reached ();
  	return NULL;
  #endif
  }
  
  /*
   * init_amodule_got:
   *
   *   Initialize the shared got entries for AMODULE.
   */
  static void
  init_amodule_got (MonoAotModule *amodule, gboolean preinit)
  {
  	MonoJumpInfo *ji;
  	MonoMemPool *mp;
  	MonoJumpInfo *patches;
  	guint32 got_offsets [128];
  	ERROR_DECL (error);
  	int i, npatches;
  
  	/* These can't be initialized in load_aot_module () */
  	if (amodule->got_initialized == GOT_INITIALIZED)
  		return;
  
  	mono_loader_lock ();
  
  	/*
  	 * If it is initialized some other thread did it in the meantime. If it is
  	 * initializing it means the current thread is initializing it since we are
  	 * holding the loader lock, skip it.
  	 */
  	if (amodule->got_initialized) {
  		mono_loader_unlock ();
  		return;
  	}
  
  	if (!preinit)
  		amodule->got_initialized = GOT_INITIALIZING;
  
  	mp = mono_mempool_new ();
  	npatches = amodule->info.nshared_got_entries;
  	for (i = 0; i < npatches; ++i)
  		got_offsets [i] = i;
  	if (amodule->got)
  		patches = decode_patches (amodule, mp, npatches, FALSE, got_offsets);
  	else
  		patches = decode_patches (amodule, mp, npatches, TRUE, got_offsets);
  	g_assert (patches);
  	for (i = 0; i < npatches; ++i) {
  		ji = &patches [i];
  
  		if (amodule->shared_got [i]) {
  		} else if (ji->type == MONO_PATCH_INFO_AOT_MODULE) {
  			amodule->shared_got [i] = amodule;
  		} else if (preinit) {
  			/*
  			 * This is called from init_amodule () during startup, so some things might not
  			 * be setup. Initialize just the slots needed to make method initialization work.
  			 */
  			if (ji->type == MONO_PATCH_INFO_JIT_ICALL_ID) {
  				if (ji->data.jit_icall_id == MONO_JIT_ICALL_mini_llvm_init_method)
  					amodule->shared_got [i] = (gpointer)mini_llvm_init_method;
  			}
  		} else if (ji->type == MONO_PATCH_INFO_GC_CARD_TABLE_ADDR && !mono_gc_is_moving ()) {
  			amodule->shared_got [i] = NULL;
  		} else if (ji->type == MONO_PATCH_INFO_GC_NURSERY_START && !mono_gc_is_moving ()) {
  			amodule->shared_got [i] = NULL;
  		} else if (ji->type == MONO_PATCH_INFO_GC_NURSERY_BITS && !mono_gc_is_moving ()) {
  			amodule->shared_got [i] = NULL;
  		} else if (ji->type == MONO_PATCH_INFO_IMAGE) {
  			amodule->shared_got [i] = amodule->assembly->image;
  		} else if (ji->type == MONO_PATCH_INFO_MSCORLIB_GOT_ADDR) {
  			if (mono_defaults.corlib) {
  				MonoAotModule *mscorlib_amodule = mono_defaults.corlib->aot_module;
  
  				if (mscorlib_amodule)
  					amodule->shared_got [i] = mscorlib_amodule->got;
  			} else {
  				amodule->shared_got [i] = amodule->got;
  			}
  		} else if (ji->type == MONO_PATCH_INFO_AOT_MODULE) {
  			amodule->shared_got [i] = amodule;
  		} else if (ji->type == MONO_PATCH_INFO_NONE) {
  		} else {
  			amodule->shared_got [i] = mono_resolve_patch_target (NULL, mono_get_root_domain (), NULL, ji, FALSE, error);
  			mono_error_assert_ok (error);
  		}
  	}
  
  	if (amodule->got) {
  		for (i = 0; i < npatches; ++i)
  			amodule->got [i] = amodule->shared_got [i];
  	}
  	if (amodule->info.flags & MONO_AOT_FILE_FLAG_WITH_LLVM) {
  		void (*init_aotconst) (int, gpointer) = (void (*)(int, gpointer))amodule->info.llvm_init_aotconst;
  		for (i = 0; i < npatches; ++i) {
  			amodule->llvm_got [i] = amodule->shared_got [i];
  			init_aotconst (i, amodule->llvm_got [i]);
  		}
  	}
  
  	mono_mempool_destroy (mp);
  
  	if (!preinit) {
  		mono_memory_barrier ();
  		amodule->got_initialized = GOT_INITIALIZED;
  	}
  	mono_loader_unlock ();
  }
  
  #ifdef MONOTOUCH
  // Follow branch islands on ARM iOS machines.
  static inline guint8 *
  method_address_resolve (guint8 *code_addr) {
  #if defined(TARGET_ARM)
  	// Skip branches to thumb destinations; the convention used is that the
  	// lowest bit is set if the destination is thumb. See
  	// get_call_table_entry.
  	if (((uintptr_t) code_addr) & 0x1)
  		return code_addr;
  #endif
  	for (;;) {
  		// `mono_arch_get_call_target` takes the IP after the branch
  		// instruction, not before. Add 4 bytes to compensate.
  		guint8 *next = mono_arch_get_call_target (code_addr + 4);
  		if (next == NULL) return code_addr;
  		code_addr = next;
  	}
  }
  #else
  static inline guint8 *
  method_address_resolve (guint8 *code_addr) {
  	return code_addr;
  }
  #endif
  
  static void
  load_aot_module (MonoAssemblyLoadContext *alc, MonoAssembly *assembly, gpointer user_data, MonoError *error)
  {
  	char *aot_name, *found_aot_name;
  	MonoAotModule *amodule;
  	MonoDl *sofile;
  	gboolean usable = TRUE;
  	char *version_symbol = NULL;
  	char *msg = NULL;
  	gpointer *globals = NULL;
  	MonoAotFileInfo *info = NULL;
  	int i, version;
  	gboolean do_load_image = TRUE;
  	int align_double, align_int64;
  	guint8 *aot_data = NULL;
  
  	if (mono_compile_aot)
  		return;
  
  	if (mono_aot_mode == MONO_AOT_MODE_NONE)
  		return;
  
  	if (assembly->image->aot_module)
  		/* 
  		 * Already loaded. This can happen because the assembly loading code might invoke
  		 * the assembly load hooks multiple times for the same assembly.
  		 */
  		return;
  
  	if (image_is_dynamic (assembly->image) || mono_asmctx_get_kind (&assembly->context) == MONO_ASMCTX_REFONLY || mono_domain_get () != mono_get_root_domain ())
  		return;
  
  	mono_aot_lock ();
  
  	if (static_aot_modules)
  		info = (MonoAotFileInfo *)g_hash_table_lookup (static_aot_modules, assembly->aname.name);
  
  	mono_aot_unlock ();
  
  	sofile = NULL;
  
  	found_aot_name = NULL;
  
  	if (info) {
  		/* Statically linked AOT module */
  		aot_name = g_strdup_printf ("%s", assembly->aname.name);
  		mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "Found statically linked AOT module '%s'.", aot_name);
  		if (!(info->flags & MONO_AOT_FILE_FLAG_LLVM_ONLY)) {
  			globals = (void **)info->globals;
  			g_assert (globals);
  		}
  		found_aot_name = g_strdup (aot_name);
  	} else {
  		char *err;
  
  		if (enable_aot_cache)
  			sofile = aot_cache_load_module (assembly, &aot_name);
  		if (!sofile) {
  			aot_name = g_strdup_printf ("%s%s", assembly->image->name, MONO_SOLIB_EXT);
  
  			sofile = mono_dl_open (aot_name, MONO_DL_LAZY, &err);
  			if (sofile) {
  				found_aot_name = g_strdup (aot_name);
  			} else {
  				mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: image '%s' not found: %s", aot_name, err);
  				g_free (err);
  			}
  			g_free (aot_name);
  		}
  #if !defined(PLATFORM_ANDROID) && !defined(TARGET_WASM)
  		if (!sofile) {
  			char *basename = g_path_get_basename (assembly->image->name);
  			aot_name = g_strdup_printf ("%s/mono/aot-cache/%s/%s%s", mono_assembly_getrootdir(), MONO_ARCHITECTURE, basename, MONO_SOLIB_EXT);
  			g_free (basename);
  			sofile = mono_dl_open (aot_name, MONO_DL_LAZY, &err);
  			if (!sofile) {
  				mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: image '%s' not found: %s", aot_name, err);
  				g_free (err);
  			}
  			g_free (aot_name);
  		}
  #endif
  		if (!sofile) {
  			GList *l;
  
  			for (l = mono_aot_paths; l; l = l->next) {
  				char *path = (char*)l->data;
  
  				char *basename = g_path_get_basename (assembly->image->name);
  				aot_name = g_strdup_printf ("%s/%s%s", path, basename, MONO_SOLIB_EXT);
  				sofile = mono_dl_open (aot_name, MONO_DL_LAZY, &err);
  				if (sofile) {
  					found_aot_name = g_strdup (aot_name);
  				} else {
  					mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: image '%s' not found: %s", aot_name, err);
  					g_free (err);
  				}
  				g_free (basename);
  				g_free (aot_name);
  				if (sofile)
  					break;
  			}
  		}
  		if (!sofile) {
  			if (mono_aot_only && !mono_use_interpreter && assembly->image->tables [MONO_TABLE_METHOD].rows) {
  				aot_name = g_strdup_printf ("%s%s", assembly->image->name, MONO_SOLIB_EXT);
  				g_error ("Failed to load AOT module '%s' in aot-only mode.\n", aot_name);
  				g_free (aot_name);
  			}
  			return;
  		}
  	}
  
  	if (!info) {
  		find_symbol (sofile, globals, "mono_aot_version", (gpointer *) &version_symbol);
  		find_symbol (sofile, globals, "mono_aot_file_info", (gpointer*)&info);
  	}
  
  	// Copy aotid to MonoImage
  	memcpy(&assembly->image->aotid, info->aotid, 16);
  
  	if (version_symbol) {
  		/* Old file format */
  		version = atoi (version_symbol);
  	} else {
  		g_assert (info);
  		version = info->version;
  	}
  
  	if (version != MONO_AOT_FILE_VERSION) {
  		msg = g_strdup_printf ("wrong file format version (expected %d got %d)", MONO_AOT_FILE_VERSION, version);
  		usable = FALSE;
  	} else {
  		guint8 *blob;
  		void *handle;
  
  		if (info->flags & MONO_AOT_FILE_FLAG_SEPARATE_DATA) {
  			aot_data = open_aot_data (assembly, info, &handle);
  
  			blob = aot_data + info->table_offsets [MONO_AOT_TABLE_BLOB];
  		} else {
  			blob = (guint8 *)info->blob;
  		}
  
  		usable = check_usable (assembly, info, blob, &msg);
  	}
  
  	if (!usable) {
  		if (mono_aot_only) {
  			g_error ("Failed to load AOT module '%s' while running in aot-only mode: %s.\n", found_aot_name, msg);
  		} else {
  			mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: module %s is unusable: %s.", found_aot_name, msg);
  		}
  		g_free (msg);
  		g_free (found_aot_name);
  		if (sofile)
  			mono_dl_close (sofile);
  		assembly->image->aot_module = NULL;
  		return;
  	}
  
  	/* Sanity check */
  	align_double = MONO_ABI_ALIGNOF (double);
  	align_int64 = MONO_ABI_ALIGNOF (gint64);
  	int card_table_shift_bits = 0;
  	gpointer card_table_mask = NULL;
  	mono_gc_get_card_table (&card_table_shift_bits, &card_table_mask);
  
  	g_assert (info->double_align == align_double);
  	g_assert (info->long_align == align_int64);
  	g_assert (info->generic_tramp_num == MONO_TRAMPOLINE_NUM);
  	g_assert (info->card_table_shift_bits == card_table_shift_bits);
  	g_assert (info->card_table_mask == GPOINTER_TO_UINT (card_table_mask));
  
  	amodule = g_new0 (MonoAotModule, 1);
  	amodule->aot_name = found_aot_name;
  	amodule->assembly = assembly;
  
  	memcpy (&amodule->info, info, sizeof (*info));
  
  	amodule->got = (void **)amodule->info.jit_got;
  	/*
  	 * The llvm code keeps its data in separate scalar variables, so this just used by this module.
  	 */
  	amodule->llvm_got = g_malloc0 (sizeof (gpointer) * amodule->info.llvm_got_size);
  	amodule->globals = globals;
  	amodule->sofile = sofile;
  	amodule->method_to_code = g_hash_table_new (mono_aligned_addr_hash, NULL);
  	amodule->extra_methods = g_hash_table_new (NULL, NULL);
  	amodule->shared_got = g_new0 (gpointer, info->nshared_got_entries);
  
  	if (info->flags & MONO_AOT_FILE_FLAG_SEPARATE_DATA) {
  		for (i = 0; i < MONO_AOT_TABLE_NUM; ++i)
  			amodule->tables [i] = aot_data + info->table_offsets [i];
  	}
  
  	mono_os_mutex_init_recursive (&amodule->mutex);
  
  	/* Read image table */
  	{
  		guint32 table_len, i;
  		char *table = NULL;
  
  		if (info->flags & MONO_AOT_FILE_FLAG_SEPARATE_DATA)
  			table = (char *)amodule->tables [MONO_AOT_TABLE_IMAGE_TABLE];
  		else
  			table = (char *)info->image_table;
  		g_assert (table);
  
  		table_len = *(guint32*)table;
  		table += sizeof (guint32);
  		amodule->image_table = g_new0 (MonoImage*, table_len);
  		amodule->image_names = g_new0 (MonoAssemblyName, table_len);
  		amodule->image_guids = g_new0 (char*, table_len);
  		amodule->image_table_len = table_len;
  		for (i = 0; i < table_len; ++i) {
  			MonoAssemblyName *aname = &(amodule->image_names [i]);
  
  			aname->name = g_strdup (table);
  			table += strlen (table) + 1;
  			amodule->image_guids [i] = g_strdup (table);
  			table += strlen (table) + 1;
  			if (table [0] != 0)
  				aname->culture = g_strdup (table);
  			table += strlen (table) + 1;
  			memcpy (aname->public_key_token, table, strlen (table) + 1);
  			table += strlen (table) + 1;			
  
  			table = (char *)ALIGN_PTR_TO (table, 8);
  			aname->flags = *(guint32*)table;
  			table += 4;
  			aname->major = *(guint32*)table;
  			table += 4;
  			aname->minor = *(guint32*)table;
  			table += 4;
  			aname->build = *(guint32*)table;
  			table += 4;
  			aname->revision = *(guint32*)table;
  			table += 4;
  		}
  	}
  
  	amodule->jit_code_start = (guint8 *)info->jit_code_start;
  	amodule->jit_code_end = (guint8 *)info->jit_code_end;
  	if (info->flags & MONO_AOT_FILE_FLAG_SEPARATE_DATA) {
  		amodule->blob = (guint8*)amodule->tables [MONO_AOT_TABLE_BLOB];
  		amodule->method_info_offsets = (guint32*)amodule->tables [MONO_AOT_TABLE_METHOD_INFO_OFFSETS];
  		amodule->ex_info_offsets = (guint32*)amodule->tables [MONO_AOT_TABLE_EX_INFO_OFFSETS];
  		amodule->class_info_offsets = (guint32*)amodule->tables [MONO_AOT_TABLE_CLASS_INFO_OFFSETS];
  		amodule->class_name_table = (guint16*)amodule->tables [MONO_AOT_TABLE_CLASS_NAME];
  		amodule->extra_method_table = (guint32*)amodule->tables [MONO_AOT_TABLE_EXTRA_METHOD_TABLE];
  		amodule->extra_method_info_offsets = (guint32*)amodule->tables [MONO_AOT_TABLE_EXTRA_METHOD_INFO_OFFSETS];
  		amodule->got_info_offsets = (guint32*)amodule->tables [MONO_AOT_TABLE_GOT_INFO_OFFSETS];
  		amodule->llvm_got_info_offsets = (guint32*)amodule->tables [MONO_AOT_TABLE_LLVM_GOT_INFO_OFFSETS];
  		amodule->weak_field_indexes = (guint32*)amodule->tables [MONO_AOT_TABLE_WEAK_FIELD_INDEXES];
  		amodule->method_flags_table = (guint8*)amodule->tables [MONO_AOT_TABLE_METHOD_FLAGS_TABLE];
  	} else {
  		amodule->blob = (guint8*)info->blob;
  		amodule->method_info_offsets = (guint32 *)info->method_info_offsets;
  		amodule->ex_info_offsets = (guint32 *)info->ex_info_offsets;
  		amodule->class_info_offsets = (guint32 *)info->class_info_offsets;
  		amodule->class_name_table = (guint16 *)info->class_name_table;
  		amodule->extra_method_table = (guint32 *)info->extra_method_table;
  		amodule->extra_method_info_offsets = (guint32 *)info->extra_method_info_offsets;
  		amodule->got_info_offsets = (guint32*)info->got_info_offsets;
  		amodule->llvm_got_info_offsets = (guint32*)info->llvm_got_info_offsets;
  		amodule->weak_field_indexes = (guint32*)info->weak_field_indexes;
  		amodule->method_flags_table = (guint8*)info->method_flags_table;
  	}
  	amodule->unbox_trampolines = (guint32 *)info->unbox_trampolines;
  	amodule->unbox_trampolines_end = (guint32 *)info->unbox_trampolines_end;
  	amodule->unbox_trampoline_addresses = (guint32 *)info->unbox_trampoline_addresses;
  	amodule->unwind_info = (guint8 *)info->unwind_info;
  	amodule->mem_begin = (guint8*)amodule->jit_code_start;
  	amodule->mem_end = (guint8 *)info->mem_end;
  	amodule->plt = (guint8 *)info->plt;
  	amodule->plt_end = (guint8 *)info->plt_end;
  	amodule->mono_eh_frame = (guint8 *)info->mono_eh_frame;
  	amodule->trampolines [MONO_AOT_TRAMP_SPECIFIC] = (guint8 *)info->specific_trampolines;
  	amodule->trampolines [MONO_AOT_TRAMP_STATIC_RGCTX] = (guint8 *)info->static_rgctx_trampolines;
  	amodule->trampolines [MONO_AOT_TRAMP_IMT] = (guint8 *)info->imt_trampolines;
  	amodule->trampolines [MONO_AOT_TRAMP_GSHAREDVT_ARG] = (guint8 *)info->gsharedvt_arg_trampolines;
  	amodule->trampolines [MONO_AOT_TRAMP_FTNPTR_ARG] = (guint8 *)info->ftnptr_arg_trampolines;
  	amodule->trampolines [MONO_AOT_TRAMP_UNBOX_ARBITRARY] = (guint8 *)info->unbox_arbitrary_trampolines;
  
  	if (mono_is_corlib_image (assembly->image) || !strcmp (assembly->aname.name, "mscorlib") || !strcmp (assembly->aname.name, "System.Private.CoreLib"))
  		mscorlib_aot_module = amodule;
  
  	/* Compute method addresses */
  	amodule->methods = (void **)g_malloc0 (amodule->info.nmethods * sizeof (gpointer));
  	for (i = 0; i < amodule->info.nmethods; ++i) {
  		void *addr = NULL;
  
  		if (amodule->info.llvm_get_method) {
  			gpointer (*get_method) (int) = (gpointer (*)(int))amodule->info.llvm_get_method;
  
  			addr = get_method (i);
  		}
  
  		if (amodule->info.flags & MONO_AOT_FILE_FLAG_CODE_EXEC_ONLY) {
  			addr = ((gpointer*)amodule->info.method_addresses) [i];
  		} else {
  			/* method_addresses () contains a table of branches, since the ios linker can update those correctly */
  			if (!addr && amodule->info.method_addresses) {
  				addr = get_call_table_entry (amodule->info.method_addresses, i, amodule->info.call_table_entry_size);
  				g_assert (addr);
  				if (addr == amodule->info.method_addresses)
  					addr = NULL;
  				else
  					addr = method_address_resolve ((guint8 *) addr);
  			}
  		}
  		if (addr == NULL)
  			amodule->methods [i] = GINT_TO_POINTER (-1);
  		else
  			amodule->methods [i] = addr;
  	}
  
  	if (make_unreadable) {
  #ifndef TARGET_WIN32
  		guint8 *addr;
  		guint8 *page_start, *page_end;
  		int err, len;
  
  		addr = amodule->mem_begin;
  		g_assert (addr);
  		len = amodule->mem_end - amodule->mem_begin;
  
  		/* Round down in both directions to avoid modifying data which is not ours */
  		page_start = (guint8 *) (((gssize) (addr)) & ~ (mono_pagesize () - 1)) + mono_pagesize ();
  		page_end = (guint8 *) (((gssize) (addr + len)) & ~ (mono_pagesize () - 1));
  		if (page_end > page_start) {
  			err = mono_mprotect (page_start, (page_end - page_start), MONO_MMAP_NONE);
  			g_assert (err == 0);
  		}
  #endif
  	}
  
  	/* Compute the boundaries of LLVM code */
  	if (info->flags & MONO_AOT_FILE_FLAG_WITH_LLVM)
  		compute_llvm_code_range (amodule, &amodule->llvm_code_start, &amodule->llvm_code_end);
  
  	mono_aot_lock ();
  
  	if (amodule->jit_code_start) {
  		aot_code_low_addr = MIN (aot_code_low_addr, (gsize)amodule->jit_code_start);
  		aot_code_high_addr = MAX (aot_code_high_addr, (gsize)amodule->jit_code_end);
  	}
  	if (amodule->llvm_code_start) {
  		aot_code_low_addr = MIN (aot_code_low_addr, (gsize)amodule->llvm_code_start);
  		aot_code_high_addr = MAX (aot_code_high_addr, (gsize)amodule->llvm_code_end);
  	}
  
  	g_hash_table_insert (aot_modules, assembly, amodule);
  	mono_aot_unlock ();
  
  	init_amodule_got (amodule, TRUE);
  
  	if (amodule->jit_code_start)
  		mono_jit_info_add_aot_module (assembly->image, amodule->jit_code_start, amodule->jit_code_end);
  	if (amodule->llvm_code_start)
  		mono_jit_info_add_aot_module (assembly->image, amodule->llvm_code_start, amodule->llvm_code_end);
  
  	assembly->image->aot_module = amodule;
  
  	if (mono_aot_only && !mono_llvm_only) {
  		char *code;
  		find_amodule_symbol (amodule, "specific_trampolines_page", (gpointer *)&code);
  		amodule->use_page_trampolines = code != NULL;
  		/*g_warning ("using page trampolines: %d", amodule->use_page_trampolines);*/
  	}
  
  	if (info->flags & MONO_AOT_FILE_FLAG_WITH_LLVM)
  		/* Directly called methods might make calls through the PLT */
  		init_plt (amodule);
  
  	/*
  	 * Register the plt region as a single trampoline so we can unwind from this code
  	 */
  	mono_aot_tramp_info_register (
  		mono_tramp_info_create (
  			NULL,
  			amodule->plt,
  			amodule->plt_end - amodule->plt,
  			NULL,
  			mono_unwind_get_cie_program ()
  			),
  		NULL
  		);
  
  	/*
  	 * Since we store methoddef and classdef tokens when referring to methods/classes in
  	 * referenced assemblies, we depend on the exact versions of the referenced assemblies.
  	 * MS calls this 'hard binding'. This means we have to load all referenced assemblies
  	 * non-lazily, since we can't handle out-of-date errors later.
  	 * The cached class info also depends on the exact assemblies.
  	 */
  	if (do_load_image) {
  		for (i = 0; i < amodule->image_table_len; ++i) {
  			ERROR_DECL (error);
  			load_image (amodule, i, error);
  			mono_error_cleanup (error); /* FIXME don't swallow the error */
  		}
  	}
  
  	if (amodule->out_of_date) {
  		mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: Module %s is unusable because a dependency is out-of-date.", assembly->image->name);
  		if (mono_aot_only)
  			g_error ("Failed to load AOT module '%s' while running in aot-only mode because a dependency cannot be found or it is out of date.\n", found_aot_name);
  	} else {
  		mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: image '%s' found.", found_aot_name);
  	}
  }
  
  /*
   * mono_aot_register_module:
   *
   * This should be called by embedding code to register normal AOT modules statically linked
   * into the executable. 
   *
   * \param aot_info the value of the 'mono_aot_module_<ASSEMBLY_NAME>_info' global symbol from the AOT module.
   */
  void
  mono_aot_register_module (gpointer *aot_info)
  {
  	gpointer *globals;
  	char *aname;
  	MonoAotFileInfo *info = (MonoAotFileInfo *)aot_info;
  
  	g_assert (info->version == MONO_AOT_FILE_VERSION);
  
  	if (!(info->flags & MONO_AOT_FILE_FLAG_LLVM_ONLY)) {
  		globals = (void **)info->globals;
  		g_assert (globals);
  	}
  
  	aname = (char *)info->assembly_name;
  
  	/* This could be called before startup */
  	if (aot_modules)
  		mono_aot_lock ();
  
  	if (!static_aot_modules)
  		static_aot_modules = g_hash_table_new (g_str_hash, g_str_equal);
  
  	g_hash_table_insert (static_aot_modules, aname, info);
  
  	if (info->flags & MONO_AOT_FILE_FLAG_EAGER_LOAD) {
  		g_assert (!container_assm_name);
  		container_assm_name = aname;
  	}
  
  	if (aot_modules)
  		mono_aot_unlock ();
  }
  
  void
  mono_aot_init (void)
  {
  	mono_os_mutex_init_recursive (&aot_mutex);
  	mono_os_mutex_init_recursive (&aot_page_mutex);
  	aot_modules = g_hash_table_new (NULL, NULL);
  
  	mono_install_assembly_load_hook_v2 (load_aot_module, NULL, FALSE);
  	mono_counters_register ("Async JIT info size", MONO_COUNTER_INT|MONO_COUNTER_JIT, &async_jit_info_size);
  
  	char *lastaot = g_getenv ("MONO_LASTAOT");
  	if (lastaot) {
  		mono_last_aot_method = atoi (lastaot);
  		g_free (lastaot);
  	}
  	aot_cache_init ();
  }
  
  void
  mono_aot_cleanup (void)
  {
  	g_hash_table_destroy (aot_modules);
  }
  
  static void
  load_container_amodule (MonoAssemblyLoadContext *alc)
  {
  	ERROR_DECL (error);
  
  	if (!container_assm_name || container_amodule)
  		return;
  
  	char *local_ref = container_assm_name;
  	container_assm_name = NULL;
  	MonoImageOpenStatus status = MONO_IMAGE_OK;
  	MonoAssemblyOpenRequest req;
  	gchar *dll = g_strdup_printf (		"%s.dll", local_ref);
  	mono_assembly_request_prepare_open (&req, MONO_ASMCTX_DEFAULT, alc);
  	MonoAssembly *assm = mono_assembly_request_open (dll, &req, &status);
  	if (!assm) {
  		gchar *exe = g_strdup_printf ("%s.exe", local_ref);
  		assm = mono_assembly_request_open (exe, &req, &status);
  	}
  	g_assert (assm);
  	load_aot_module (alc, assm, NULL, error);
  	container_amodule = assm->image->aot_module;
  }
  
  static gboolean
  decode_cached_class_info (MonoAotModule *module, MonoCachedClassInfo *info, guint8 *buf, guint8 **endbuf)
  {
  	ERROR_DECL (error);
  	guint32 flags;
  	MethodRef ref;
  	gboolean res;
  
  	info->vtable_size = decode_value (buf, &buf);
  	if (info->vtable_size == -1)
  		/* Generic type */
  		return FALSE;
  	flags = decode_value (buf, &buf);
  	info->ghcimpl = (flags >> 0) & 0x1;
  	info->has_finalize = (flags >> 1) & 0x1;
  	info->has_cctor = (flags >> 2) & 0x1;
  	info->has_nested_classes = (flags >> 3) & 0x1;
  	info->blittable = (flags >> 4) & 0x1;
  	info->has_references = (flags >> 5) & 0x1;
  	info->has_static_refs = (flags >> 6) & 0x1;
  	info->no_special_static_fields = (flags >> 7) & 0x1;
  	info->is_generic_container = (flags >> 8) & 0x1;
  	info->has_weak_fields = (flags >> 9) & 0x1;
  
  	if (info->has_cctor) {
  		res = decode_method_ref (module, &ref, buf, &buf, error);
  		mono_error_assert_ok (error); /* FIXME don't swallow the error */
  		if (!res)
  			return FALSE;
  		info->cctor_token = ref.token;
  	}
  	if (info->has_finalize) {
  		res = decode_method_ref (module, &ref, buf, &buf, error);
  		mono_error_assert_ok (error); /* FIXME don't swallow the error */
  		if (!res)
  			return FALSE;
  		info->finalize_image = ref.image;
  		info->finalize_token = ref.token;
  	}
  
  	info->instance_size = decode_value (buf, &buf);
  	info->class_size = decode_value (buf, &buf);
  	info->packing_size = decode_value (buf, &buf);
  	info->min_align = decode_value (buf, &buf);
  
  	*endbuf = buf;
  
  	return TRUE;
  }	
  
  gpointer
  mono_aot_get_method_from_vt_slot (MonoDomain *domain, MonoVTable *vtable, int slot, MonoError *error)
  {
  	int i;
  	MonoClass *klass = vtable->klass;
  	MonoAotModule *amodule = m_class_get_image (klass)->aot_module;
  	guint8 *info, *p;
  	MonoCachedClassInfo class_info;
  	gboolean err;
  	MethodRef ref;
  	gboolean res;
  	gpointer addr;
  	ERROR_DECL (inner_error);
  
  	error_init (error);
  
  	if (MONO_CLASS_IS_INTERFACE_INTERNAL (klass) || m_class_get_rank (klass) || !amodule)
  		return NULL;
  
  	info = &amodule->blob [mono_aot_get_offset (amodule->class_info_offsets, mono_metadata_token_index (m_class_get_type_token (klass)) - 1)];
  	p = info;
  
  	err = decode_cached_class_info (amodule, &class_info, p, &p);
  	if (!err)
  		return NULL;
  
  	for (i = 0; i < slot; ++i) {
  		decode_method_ref (amodule, &ref, p, &p, inner_error);
  		mono_error_cleanup (inner_error); /* FIXME don't swallow the error */
  	}
  
  	res = decode_method_ref (amodule, &ref, p, &p, inner_error);
  	mono_error_cleanup (inner_error); /* FIXME don't swallow the error */
  	if (!res)
  		return NULL;
  	if (ref.no_aot_trampoline)
  		return NULL;
  
  	if (mono_metadata_token_index (ref.token) == 0 || mono_metadata_token_table (ref.token) != MONO_TABLE_METHOD)
  		return NULL;
  
  	addr = mono_aot_get_method_from_token (domain, ref.image, ref.token, error);
  	return addr;
  }
  
  gboolean
  mono_aot_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res)
  {
  	MonoAotModule *amodule = m_class_get_image (klass)->aot_module;
  	guint8 *p;
  	gboolean err;
  
  	if (m_class_get_rank (klass) || !m_class_get_type_token (klass) || !amodule)
  		return FALSE;
  
  	p = (guint8*)&amodule->blob [mono_aot_get_offset (amodule->class_info_offsets, mono_metadata_token_index (m_class_get_type_token (klass)) - 1)];
  
  	err = decode_cached_class_info (amodule, res, p, &p);
  	if (!err)
  		return FALSE;
  
  	return TRUE;
  }
  
  /**
   * mono_aot_get_class_from_name:
   *
   *  Obtains a MonoClass with a given namespace and a given name which is located in IMAGE,
   * using a cache stored in the AOT file.
   * Stores the resulting class in *KLASS if found, stores NULL otherwise.
   *
   * Returns: TRUE if the klass was found/not found in the cache, FALSE if no aot file was 
   * found.
   */
  gboolean
  mono_aot_get_class_from_name (MonoImage *image, const char *name_space, const char *name, MonoClass **klass)
  {
  	MonoAotModule *amodule = image->aot_module;
  	guint16 *table, *entry;
  	guint16 table_size;
  	guint32 hash;
  	char full_name_buf [1024];
  	char *full_name;
  	const char *name2, *name_space2;
  	MonoTableInfo  *t;
  	guint32 cols [MONO_TYPEDEF_SIZE];
  	GHashTable *nspace_table;
  
  	if (!amodule || !amodule->class_name_table)
  		return FALSE;
  
  	amodule_lock (amodule);
  
  	*klass = NULL;
  
  	/* First look in the cache */
  	if (!amodule->name_cache)
  		amodule->name_cache = g_hash_table_new (g_str_hash, g_str_equal);
  	nspace_table = (GHashTable *)g_hash_table_lookup (amodule->name_cache, name_space);
  	if (nspace_table) {
  		*klass = (MonoClass *)g_hash_table_lookup (nspace_table, name);
  		if (*klass) {
  			amodule_unlock (amodule);
  			return TRUE;
  		}
  	}
  
  	table_size = amodule->class_name_table [0];
  	table = amodule->class_name_table + 1;
  
  	if (name_space [0] == '\0')
  		full_name = g_strdup_printf ("%s", name);
  	else {
  		if (strlen (name_space) + strlen (name) < 1000) {
  			sprintf (full_name_buf, "%s.%s", name_space, name);
  			full_name = full_name_buf;
  		} else {
  			full_name = g_strdup_printf ("%s.%s", name_space, name);
  		}
  	}
  	hash = mono_metadata_str_hash (full_name) % table_size;
  	if (full_name != full_name_buf)
  		g_free (full_name);
  
  	entry = &table [hash * 2];
  
  	if (entry [0] != 0) {
  		t = &image->tables [MONO_TABLE_TYPEDEF];
  
  		while (TRUE) {
  			guint32 index = entry [0];
  			guint32 next = entry [1];
  			guint32 token = mono_metadata_make_token (MONO_TABLE_TYPEDEF, index);
  
  			name_table_accesses ++;
  
  			mono_metadata_decode_row (t, index - 1, cols, MONO_TYPEDEF_SIZE);
  
  			name2 = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
  			name_space2 = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
  
  			if (!strcmp (name, name2) && !strcmp (name_space, name_space2)) {
  				ERROR_DECL (error);
  				amodule_unlock (amodule);
  				*klass = mono_class_get_checked (image, token, error);
  				if (!is_ok (error))
  					mono_error_cleanup (error); /* FIXME don't swallow the error */
  
  				/* Add to cache */
  				if (*klass) {
  					amodule_lock (amodule);
  					nspace_table = (GHashTable *)g_hash_table_lookup (amodule->name_cache, name_space);
  					if (!nspace_table) {
  						nspace_table = g_hash_table_new (g_str_hash, g_str_equal);
  						g_hash_table_insert (amodule->name_cache, (char*)name_space2, nspace_table);
  					}
  					g_hash_table_insert (nspace_table, (char*)name2, *klass);
  					amodule_unlock (amodule);
  				}
  				return TRUE;
  			}
  
  			if (next != 0) {
  				entry = &table [next * 2];
  			} else {
  				break;
  			}
  		}
  	}
  
  	amodule_unlock (amodule);
  	
  	return TRUE;
  }
  
  GHashTable *
  mono_aot_get_weak_field_indexes (MonoImage *image)
  {
  	MonoAotModule *amodule = image->aot_module;
  
  	if (!amodule)
  		return NULL;
  
  	/* Initialize weak field indexes from the cached copy */
  	guint32 *indexes = (guint32*)amodule->weak_field_indexes;
  	int len  = indexes [0];
  	GHashTable *indexes_hash = g_hash_table_new (NULL, NULL);
  	for (int i = 0; i < len; ++i)
  		g_hash_table_insert (indexes_hash, GUINT_TO_POINTER (indexes [i + 1]), GUINT_TO_POINTER (1));
  	return indexes_hash;
  }
  
  /* Compute the boundaries of the LLVM code for AMODULE. */
  static void
  compute_llvm_code_range (MonoAotModule *amodule, guint8 **code_start, guint8 **code_end)
  {
  	guint8 *p;
  	int version, fde_count;
  	gint32 *table;
  
  	if (amodule->info.llvm_get_method) {
  		gpointer (*get_method) (int) = (gpointer (*)(int))amodule->info.llvm_get_method;
  
  #ifdef HOST_WASM
  		gsize min = 1 << 30, max = 0;
  		gsize prev = 0;
  
  		// FIXME: This depends on emscripten allocating ftnptr ids sequentially
  		for (int i = 0; i < amodule->info.nmethods; ++i) {
  			void *addr = NULL;
  
  			addr = get_method (i);
  			gsize val = (gsize)addr;
  			if (val) {
  				//g_assert (val > prev);
  				if (val < min)
  					min = val;
  				else if (val > max)
  					max = val;
  				prev = val;
  			}
  		}
  		if (max) {
  			*code_start = (guint8*)min;
  			*code_end = (guint8*)(max + 1);
  		} else {
  			*code_start = NULL;
  			*code_end = NULL;
  		}
  #else
  		*code_start = (guint8 *)get_method (-1);
  		*code_end = (guint8 *)get_method (-2);
  
  		g_assert (*code_end > *code_start);
  #endif
  		return;
  	}
  
  	g_assert (amodule->mono_eh_frame);
  
  	p = amodule->mono_eh_frame;
  
  	/* p points to data emitted by LLVM in DwarfException::EmitMonoEHFrame () */
  
  	/* Header */
  	version = *p;
  	g_assert (version == 3);
  	p ++;
  	p ++;
  	p = (guint8 *)ALIGN_PTR_TO (p, 4);
  
  	fde_count = *(guint32*)p;
  	p += 4;
  	table = (gint32*)p;
  
  	if (fde_count > 0) {
  		*code_start = (guint8 *)amodule->methods [table [0]];
  		*code_end = (guint8*)amodule->methods [table [(fde_count - 1) * 2]] + table [fde_count * 2];
  	} else {
  		*code_start = NULL;
  		*code_end = NULL;
  	}
  }
  
  static gboolean
  is_llvm_code (MonoAotModule *amodule, guint8 *code)
  {
  #if HOST_WASM
  	return TRUE;
  #else
  	if ((guint8*)code >= amodule->llvm_code_start && (guint8*)code < amodule->llvm_code_end)
  		return TRUE;
  	else
  		return FALSE;
  #endif
  }
  
  static gboolean
  is_thumb_code (MonoAotModule *amodule, guint8 *code)
  {
  	if (is_llvm_code (amodule, code) && (amodule->info.flags & MONO_AOT_FILE_FLAG_LLVM_THUMB))
  		return TRUE;
  	else
  		return FALSE;
  }
  
  /*
   * decode_llvm_mono_eh_frame:
   *
   *   Decode the EH information emitted by our modified LLVM compiler and construct a
   * MonoJitInfo structure from it.
   * If JINFO is NULL, set OUT_LLVM_CLAUSES to the number of llvm level clauses.
   * This function is async safe when called in async context.
   */
  static void
  decode_llvm_mono_eh_frame (MonoAotModule *amodule, MonoDomain *domain, MonoJitInfo *jinfo,
  						   guint8 *code, guint32 code_len,
  						   MonoJitExceptionInfo *clauses, int num_clauses,
  						   GSList **nesting,
  						   int *this_reg, int *this_offset, int *out_llvm_clauses)
  {
  	guint8 *p, *code1, *code2;
  	guint8 *fde, *cie, *code_start, *code_end;
  	int version, fde_count;
  	gint32 *table;
  	int i, pos, left, right;
  	MonoJitExceptionInfo *ei;
  	guint32 fde_len, ei_len, nested_len, nindex;
  	gpointer *type_info;
  	MonoLLVMFDEInfo info;
  	guint8 *unw_info;
  	gboolean async;
  
  	async = mono_thread_info_is_async_context ();
  
  	if (!amodule->mono_eh_frame) {
  		if (!jinfo) {
  			*out_llvm_clauses = num_clauses;
  			return;
  		}
  		memcpy (jinfo->clauses, clauses, num_clauses * sizeof (MonoJitExceptionInfo));
  		return;
  	}
  
  	g_assert (amodule->mono_eh_frame && code);
  
  	p = amodule->mono_eh_frame;
  
  	/* p points to data emitted by LLVM in DwarfMonoException::EmitMonoEHFrame () */
  
  	/* Header */
  	version = *p;
  	g_assert (version == 3);
  	p ++;
  	/* func_encoding = *p; */
  	p ++;
  	p = (guint8 *)ALIGN_PTR_TO (p, 4);
  
  	fde_count = *(guint32*)p;
  	p += 4;
  	table = (gint32*)p;
  
  	/* There is +1 entry in the table */
  	cie = p + ((fde_count + 1) * 8);
  
  	/* Binary search in the table to find the entry for code */
  	left = 0;
  	right = fde_count;
  	while (TRUE) {
  		pos = (left + right) / 2;
  
  		/* The table contains method index/fde offset pairs */
  		g_assert (table [(pos * 2)] != -1);
  		code1 = (guint8 *)amodule->methods [table [(pos * 2)]];
  		if (pos + 1 == fde_count) {
  			code2 = amodule->llvm_code_end;
  		} else {
  			g_assert (table [(pos + 1) * 2] != -1);
  			code2 = (guint8 *)amodule->methods [table [(pos + 1) * 2]];
  		}
  
  		if (code < code1)
  			right = pos;
  		else if (code >= code2)
  			left = pos + 1;
  		else
  			break;
  	}
  
  	code_start = (guint8 *)amodule->methods [table [(pos * 2)]];
  	if (pos + 1 == fde_count) {
  		/* The +1 entry in the table contains the length of the last method */
  		int len = table [(pos + 1) * 2];
  		code_end = code_start + len;
  	} else {
  		code_end = (guint8 *)amodule->methods [table [(pos + 1) * 2]];
  	}
  	if (!code_len)
  		code_len = code_end - code_start;
  
  	g_assert (code >= code_start && code < code_end);
  
  	if (is_thumb_code (amodule, code_start))
  		/* Clear thumb flag */
  		code_start = (guint8*)(((gsize)code_start) & ~1);
  
  	fde = amodule->mono_eh_frame + table [(pos * 2) + 1];	
  	/* This won't overflow because there is +1 entry in the table */
  	fde_len = table [(pos * 2) + 2 + 1] - table [(pos * 2) + 1];
  
  	/* Compute lengths */
  	mono_unwind_decode_llvm_mono_fde (fde, fde_len, cie, code_start, &info, NULL, NULL, NULL);
  
  	if (async) {
  		/* These are leaked, but the leak is bounded */
  		ei = mono_domain_alloc0_lock_free (domain, info.ex_info_len * sizeof (MonoJitExceptionInfo));
  		type_info = mono_domain_alloc0_lock_free (domain, info.ex_info_len * sizeof (gpointer));
  		unw_info = mono_domain_alloc0_lock_free (domain, info.unw_info_len);
  	} else {
  		ei = (MonoJitExceptionInfo *)g_malloc0 (info.ex_info_len * sizeof (MonoJitExceptionInfo));
  		type_info = (gpointer *)g_malloc0 (info.ex_info_len * sizeof (gpointer));
  		unw_info = (guint8*)g_malloc0 (info.unw_info_len);
  	}
  	mono_unwind_decode_llvm_mono_fde (fde, fde_len, cie, code_start, &info, ei, type_info, unw_info);
  
  	ei_len = info.ex_info_len;
  	*this_reg = info.this_reg;
  	*this_offset = info.this_offset;
  
  	/*
  	 * LLVM might represent one IL region with multiple regions.
  	 */
  
  	/* Count number of nested clauses */
  	nested_len = 0;
  	for (i = 0; i < ei_len; ++i) {
  		/* This might be unaligned */
  		gint32 cindex1 = read32 (type_info [i]);
  		GSList *l;
  
  		for (l = nesting [cindex1]; l; l = l->next)
  			nested_len ++;
  	}
  
  	if (!jinfo) {
  		*out_llvm_clauses = ei_len + nested_len;
  		return;
  	}
  
  	/* Store the unwind info addr/length in the MonoJitInfo structure itself so its async safe */
  	MonoUnwindJitInfo *jinfo_unwind = mono_jit_info_get_unwind_info (jinfo);
  	g_assert (jinfo_unwind);
  	jinfo_unwind->unw_info = unw_info;
  	jinfo_unwind->unw_info_len = info.unw_info_len;
  
  	for (i = 0; i < ei_len; ++i) {
  		/*
  		 * clauses contains the original IL exception info saved by the AOT
  		 * compiler, we have to combine that with the information produced by LLVM
  		 */
  		/* The type_info entries contain IL clause indexes */
  		int clause_index = read32 (type_info [i]);
  		MonoJitExceptionInfo *jei = &jinfo->clauses [i];
  		MonoJitExceptionInfo *orig_jei = &clauses [clause_index];
  
  		g_assert (clause_index < num_clauses);
  		jei->flags = orig_jei->flags;
  		jei->data.catch_class = orig_jei->data.catch_class;
  
  		jei->try_start = ei [i].try_start;
  		jei->try_end = ei [i].try_end;
  		jei->handler_start = ei [i].handler_start;
  		jei->clause_index = clause_index;
  
  		if (is_thumb_code (amodule, (guint8 *)jei->try_start)) {
  			jei->try_start = (void*)((gsize)jei->try_start & ~1);
  			jei->try_end = (void*)((gsize)jei->try_end & ~1);
  			/* Make sure we transition to thumb when a handler starts */
  			jei->handler_start = (void*)((gsize)jei->handler_start + 1);
  		}
  	}
  
  	/* See exception_cb () in mini-llvm.c as to why this is needed */
  	nindex = ei_len;
  	for (i = 0; i < ei_len; ++i) {
  		gint32 cindex1 = read32 (type_info [i]);
  		GSList *l;
  
  		for (l = nesting [cindex1]; l; l = l->next) {
  			gint32 nesting_cindex = GPOINTER_TO_INT (l->data);
  			MonoJitExceptionInfo *nesting_ei;
  			MonoJitExceptionInfo *nesting_clause = &clauses [nesting_cindex];
  
  			nesting_ei = &jinfo->clauses [nindex];
  			nindex ++;
  
  			memcpy (nesting_ei, &jinfo->clauses [i], sizeof (MonoJitExceptionInfo));
  			nesting_ei->flags = nesting_clause->flags;
  			nesting_ei->data.catch_class = nesting_clause->data.catch_class;
  			nesting_ei->clause_index = nesting_cindex;
  		}
  	}
  	g_assert (nindex == ei_len + nested_len);
  }
  
  static gpointer
  alloc0_jit_info_data (MonoDomain *domain, int size, gboolean async_context)
  
  #define alloc0_jit_info_data(domain, size, async_context) (g_cast (alloc0_jit_info_data ((domain), (size), (async_context))))
  
  {
  	gpointer res;
  
  	if (async_context) {
  		res = mono_domain_alloc0_lock_free (domain, size);
  		mono_atomic_fetch_add_i32 (&async_jit_info_size, size);
  	} else {
  		res = mono_domain_alloc0 (domain, size);
  	}
  	return res;
  }
  
  /*
   * LOCKING: Acquires the domain lock.
   * In async context, this is async safe.
   */
  static MonoJitInfo*
  decode_exception_debug_info (MonoAotModule *amodule, MonoDomain *domain, 
  							 MonoMethod *method, guint8* ex_info,
  							 guint8 *code, guint32 code_len)
  {
  	ERROR_DECL (error);
  	int i, buf_len, num_clauses, len;
  	MonoJitInfo *jinfo;
  	MonoJitInfoFlags flags = JIT_INFO_NONE;
  	guint unwind_info, eflags;
  	gboolean has_generic_jit_info, has_dwarf_unwind_info, has_clauses, has_seq_points, has_try_block_holes, has_arch_eh_jit_info;
  	gboolean from_llvm, has_gc_map;
  	guint8 *p;
  	int try_holes_info_size, num_holes;
  	int this_reg = 0, this_offset = 0;
  	gboolean async;
  
  	/* Load the method info from the AOT file */
  	async = mono_thread_info_is_async_context ();
  
  	p = ex_info;
  	eflags = decode_value (p, &p);
  	has_generic_jit_info = (eflags & 1) != 0;
  	has_dwarf_unwind_info = (eflags & 2) != 0;
  	has_clauses = (eflags & 4) != 0;
  	has_seq_points = (eflags & 8) != 0;
  	from_llvm = (eflags & 16) != 0;
  	has_try_block_holes = (eflags & 32) != 0;
  	has_gc_map = (eflags & 64) != 0;
  	has_arch_eh_jit_info = (eflags & 128) != 0;
  
  	if (has_dwarf_unwind_info) {
  		unwind_info = decode_value (p, &p);
  		g_assert (unwind_info < (1 << 30));
  	} else {
  		unwind_info = decode_value (p, &p);
  	}
  	if (has_generic_jit_info)
  		flags |= JIT_INFO_HAS_GENERIC_JIT_INFO;
  
  	if (has_try_block_holes) {
  		num_holes = decode_value (p, &p);
  		flags |= JIT_INFO_HAS_TRY_BLOCK_HOLES;
  		try_holes_info_size = sizeof (MonoTryBlockHoleTableJitInfo) + num_holes * sizeof (MonoTryBlockHoleJitInfo);
  	} else {
  		num_holes = try_holes_info_size = 0;
  	}
  
  	if (has_arch_eh_jit_info) {
  		flags |= JIT_INFO_HAS_ARCH_EH_INFO;
  		/* Overwrite the original code_len which includes alignment padding */
  		code_len = decode_value (p, &p);
  	}
  
  	/* Exception table */
  	if (has_clauses)
  		num_clauses = decode_value (p, &p);
  	else
  		num_clauses = 0;
  
  	if (from_llvm) {
  		MonoJitExceptionInfo *clauses;
  		GSList **nesting;
  
  		/*
  		 * Part of the info is encoded by the AOT compiler, the rest is in the .eh_frame
  		 * section.
  		 */
  		if (async) {
  			if (num_clauses < 16) {
  				clauses = g_newa (MonoJitExceptionInfo, num_clauses);
  				nesting = g_newa (GSList*, num_clauses);
  			} else {
  				clauses = alloc0_jit_info_data (domain, sizeof (MonoJitExceptionInfo) * num_clauses, TRUE);
  				nesting = alloc0_jit_info_data (domain, sizeof (GSList*) * num_clauses, TRUE);
  			}
  			memset (clauses, 0, sizeof (MonoJitExceptionInfo) * num_clauses);
  			memset (nesting, 0, sizeof (GSList*) * num_clauses);
  		} else {
  			clauses = g_new0 (MonoJitExceptionInfo, num_clauses);
  			nesting = g_new0 (GSList*, num_clauses);
  		}
  
  		for (i = 0; i < num_clauses; ++i) {
  			MonoJitExceptionInfo *ei = &clauses [i];
  
  			ei->flags = decode_value (p, &p);
  
  			if (!(ei->flags == MONO_EXCEPTION_CLAUSE_FILTER || ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY)) {
  				int len = decode_value (p, &p);
  
  				if (len > 0) {
  					if (async) {
  						p += len;
  					} else {
  						ei->data.catch_class = decode_klass_ref (amodule, p, &p, error);
  						mono_error_cleanup (error); /* FIXME don't swallow the error */
  					}
  				}
  			}
  
  			ei->clause_index = i;
  
  			ei->try_offset = decode_value (p, &p);
  			ei->try_len = decode_value (p, &p);
  			ei->handler_offset = decode_value (p, &p);
  			ei->handler_len = decode_value (p, &p);
  
  			/* Read the list of nesting clauses */
  			while (TRUE) {
  				int nesting_index = decode_value (p, &p);
  				if (nesting_index == -1)
  					break;
  				// FIXME: async
  				g_assert (!async);
  				nesting [i] = g_slist_prepend (nesting [i], GINT_TO_POINTER (nesting_index));
  			}
  		}
  
  		flags |= JIT_INFO_HAS_UNWIND_INFO;
  
  		int num_llvm_clauses;
  		/* Get the length first */
  		decode_llvm_mono_eh_frame (amodule, domain, NULL, code, code_len, clauses, num_clauses, nesting, &this_reg, &this_offset, &num_llvm_clauses);
  		len = mono_jit_info_size (flags, num_llvm_clauses, num_holes);
  		jinfo = (MonoJitInfo *)alloc0_jit_info_data (domain, len, async);
  		mono_jit_info_init (jinfo, method, code, code_len, flags, num_llvm_clauses, num_holes);
  
  		decode_llvm_mono_eh_frame (amodule, domain, jinfo, code, code_len, clauses, num_clauses, nesting, &this_reg, &this_offset, NULL);
  
  		if (!async) {
  			g_free (clauses);
  			for (i = 0; i < num_clauses; ++i)
  				g_slist_free (nesting [i]);
  			g_free (nesting);
  		}
  		jinfo->from_llvm = 1;
  	} else {
  		len = mono_jit_info_size (flags, num_clauses, num_holes);
  		jinfo = (MonoJitInfo *)alloc0_jit_info_data (domain, len, async);
  		mono_jit_info_init (jinfo, method, code, code_len, flags, num_clauses, num_holes);
  
  		for (i = 0; i < jinfo->num_clauses; ++i) {
  			MonoJitExceptionInfo *ei = &jinfo->clauses [i];
  
  			ei->flags = decode_value (p, &p);
  
  #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
  			/* Not used for catch clauses */
  			if (ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
  				ei->exvar_offset = decode_value (p, &p);
  #else
  			ei->exvar_offset = decode_value (p, &p);
  #endif
  
  			if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER || ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY)
  				ei->data.filter = code + decode_value (p, &p);
  			else {
  				int len = decode_value (p, &p);
  
  				if (len > 0) {
  					if (async) {
  						p += len;
  					} else {
  						ei->data.catch_class = decode_klass_ref (amodule, p, &p, error);
  						mono_error_cleanup (error); /* FIXME don't swallow the error */
  					}
  				}
  			}
  
  			ei->try_start = code + decode_value (p, &p);
  			ei->try_end = code + decode_value (p, &p);
  			ei->handler_start = code + decode_value (p, &p);
  		}
  
  		jinfo->unwind_info = unwind_info;
  		jinfo->domain_neutral = 0;
  		jinfo->from_aot = 1;
  	}
  
  	if (has_try_block_holes) {
  		MonoTryBlockHoleTableJitInfo *table;
  
  		g_assert (jinfo->has_try_block_holes);
  
  		table = mono_jit_info_get_try_block_hole_table_info (jinfo);
  		g_assert (table);
  
  		table->num_holes = (guint16)num_holes;
  		for (i = 0; i < num_holes; ++i) {
  			MonoTryBlockHoleJitInfo *hole = &table->holes [i];
  			hole->clause = decode_value (p, &p);
  			hole->length = decode_value (p, &p);
  			hole->offset = decode_value (p, &p);
  		}
  	}
  
  	if (has_arch_eh_jit_info) {
  		MonoArchEHJitInfo *eh_info;
  
  		g_assert (jinfo->has_arch_eh_info);
  
  		eh_info = mono_jit_info_get_arch_eh_info (jinfo);
  		eh_info->stack_size = decode_value (p, &p);
  		eh_info->epilog_size = decode_value (p, &p);
  	}
  
  	if (async) {
  		/* The rest is not needed in async mode */
  		jinfo->async = TRUE;
  		jinfo->d.aot_info = amodule;
  		// FIXME: Cache
  		return jinfo;
  	}
  
  	if (has_generic_jit_info) {
  		MonoGenericJitInfo *gi;
  		int len;
  
  		g_assert (jinfo->has_generic_jit_info);
  
  		gi = mono_jit_info_get_generic_jit_info (jinfo);
  		g_assert (gi);
  
  		gi->nlocs = decode_value (p, &p);
  		if (gi->nlocs) {
  			gi->locations = (MonoDwarfLocListEntry *)alloc0_jit_info_data (domain, gi->nlocs * sizeof (MonoDwarfLocListEntry), async);
  			for (i = 0; i < gi->nlocs; ++i) {
  				MonoDwarfLocListEntry *entry = &gi->locations [i];
  
  				entry->is_reg = decode_value (p, &p);
  				entry->reg = decode_value (p, &p);
  				if (!entry->is_reg)
  					entry->offset = decode_value (p, &p);
  				if (i > 0)
  					entry->from = decode_value (p, &p);
  				entry->to = decode_value (p, &p);
  			}
  			gi->has_this = 1;
  		} else {
  			if (from_llvm) {
  				gi->has_this = this_reg != -1;
  				gi->this_reg = this_reg;
  				gi->this_offset = this_offset;
  			} else {
  				gi->has_this = decode_value (p, &p);
  				gi->this_reg = decode_value (p, &p);
  				gi->this_offset = decode_value (p, &p);
  			}
  		}
  
  		len = decode_value (p, &p);
  		if (async) {
  			p += len;
  		} else {
  			jinfo->d.method = decode_resolve_method_ref (amodule, p, &p, error);
  			mono_error_cleanup (error); /* FIXME don't swallow the error */
  		}
  
  		gi->generic_sharing_context = alloc0_jit_info_data (domain, sizeof (MonoGenericSharingContext), async);
  		if (decode_value (p, &p)) {
  			/* gsharedvt */
  			MonoGenericSharingContext *gsctx = gi->generic_sharing_context;
  
  			gsctx->is_gsharedvt = TRUE;
  		}
  	}
  
  	if (method && has_seq_points) {
  		MonoSeqPointInfo *seq_points;
  
  		p += mono_seq_point_info_read (&seq_points, p, FALSE);
  
  		mono_domain_lock (domain);
  		/* This could be set already since this function can be called more than once for the same method */
  		if (!g_hash_table_lookup (domain_jit_info (domain)->seq_points, method))
  			g_hash_table_insert (domain_jit_info (domain)->seq_points, method, seq_points);
  		else
  			mono_seq_point_info_free (seq_points);
  		mono_domain_unlock (domain);
  
  		jinfo->seq_points = seq_points;
  	}
  
  	/* Load debug info */
  	buf_len = decode_value (p, &p);
  	if (!async)
  		mono_debug_add_aot_method (domain, method, code, p, buf_len);
  	p += buf_len;
  
  	if (has_gc_map) {
  		int map_size = decode_value (p, &p);
  		/* The GC map requires 4 bytes of alignment */
  		while ((guint64)(gsize)p % 4)
  			p ++;		
  		jinfo->gc_info = p;
  		p += map_size;
  	}
  
  	if (amodule != m_class_get_image (jinfo->d.method->klass)->aot_module) {
  		mono_aot_lock ();
  		if (!ji_to_amodule)
  			ji_to_amodule = g_hash_table_new (NULL, NULL);
  		g_hash_table_insert (ji_to_amodule, jinfo, amodule);
  		mono_aot_unlock ();		
  	}
  
  	return jinfo;
  }
  
  static gboolean
  amodule_contains_code_addr (MonoAotModule *amodule, guint8 *code)
  {
  	return (code >= amodule->jit_code_start && code <= amodule->jit_code_end) ||
  		(code >= amodule->llvm_code_start && code <= amodule->llvm_code_end);
  }
  
  /*
   * mono_aot_get_unwind_info:
   *
   *   Return a pointer to the DWARF unwind info belonging to JI.
   */
  guint8*
  mono_aot_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
  {
  	MonoAotModule *amodule;
  	guint8 *p;
  	guint8 *code = (guint8 *)ji->code_start;
  
  	if (ji->async)
  		amodule = ji->d.aot_info;
  	else
  		amodule = m_class_get_image (jinfo_get_method (ji)->klass)->aot_module;
  	g_assert (amodule);
  	g_assert (ji->from_aot);
  
  	if (!amodule_contains_code_addr (amodule, code)) {
  		/* ji belongs to a different aot module than amodule */
  		mono_aot_lock ();
  		g_assert (ji_to_amodule);
  		amodule = (MonoAotModule *)g_hash_table_lookup (ji_to_amodule, ji);
  		g_assert (amodule);
  		g_assert (amodule_contains_code_addr (amodule, code));
  		mono_aot_unlock ();
  	}
  
  	p = amodule->unwind_info + ji->unwind_info;
  	*unwind_info_len = decode_value (p, &p);
  	return p;
  }
  
  static void
  msort_method_addresses_internal (gpointer *array, int *indexes, int lo, int hi, gpointer *scratch, int *scratch_indexes)
  {
  	int mid = (lo + hi) / 2;
  	int i, t_lo, t_hi;
  
  	if (lo >= hi)
  		return;
  
  	if (hi - lo < 32) {
  		for (i = lo; i < hi; ++i)
  			if (array [i] > array [i + 1])
  				break;
  		if (i == hi)
  			/* Already sorted */
  			return;
  	}
  
  	msort_method_addresses_internal (array, indexes, lo, mid, scratch, scratch_indexes);
  	msort_method_addresses_internal (array, indexes, mid + 1, hi, scratch, scratch_indexes);
  
  	if (array [mid] < array [mid + 1])
  		return;
  
  	/* Merge */
  	t_lo = lo;
  	t_hi = mid + 1;
  	for (i = lo; i <= hi; i ++) {
  		if (t_lo <= mid && ((t_hi > hi) || array [t_lo] < array [t_hi])) {
  			scratch [i] = array [t_lo];
  			scratch_indexes [i] = indexes [t_lo];
  			t_lo ++;
  		} else {
  			scratch [i] = array [t_hi];
  			scratch_indexes [i] = indexes [t_hi];
  			t_hi ++;
  		}
  	}
  	for (i = lo; i <= hi; ++i) {
  		array [i] = scratch [i];
  		indexes [i] = scratch_indexes [i];
  	}
  }
  
  static void
  msort_method_addresses (gpointer *array, int *indexes, int len)
  {
  	gpointer *scratch;
  	int *scratch_indexes;
  
  	scratch = g_new (gpointer, len);
  	scratch_indexes = g_new (int, len);
  	msort_method_addresses_internal (array, indexes, 0, len - 1, scratch, scratch_indexes);
  	g_free (scratch);
  	g_free (scratch_indexes);
  }
  
  /*
   * mono_aot_find_jit_info:
   *
   *   In async context, the resulting MonoJitInfo will not have its method field set, and it will not be added
   * to the jit info tables.
   * FIXME: Large sizes in the lock free allocator
   */
  MonoJitInfo *
  mono_aot_find_jit_info (MonoDomain *domain, MonoImage *image, gpointer addr)
  {
  	ERROR_DECL (error);
  	int pos, left, right, code_len;
  	int method_index, table_len;
  	guint32 token;
  	MonoAotModule *amodule = image->aot_module;
  	MonoMethod *method = NULL;
  	MonoJitInfo *jinfo;
  	guint8 *code, *ex_info, *p;
  	guint32 *table;
  	int nmethods;
  	gpointer *methods;
  	guint8 *code1, *code2;
  	int methods_len, i;
  	gboolean async;
  
  	if (!amodule)
  		return NULL;
  
  	nmethods = amodule->info.nmethods;
  
  	if (domain != mono_get_root_domain ())
  		/* FIXME: */
  		return NULL;
  
  	if (!amodule_contains_code_addr (amodule, (guint8 *)addr))
  		return NULL;
  
  	async = mono_thread_info_is_async_context ();
  
  	/* Compute a sorted table mapping code to method indexes. */
  	if (!amodule->sorted_methods) {
  		// FIXME: async
  		gpointer *methods = g_new0 (gpointer, nmethods);
  		int *method_indexes = g_new0 (int, nmethods);
  		int methods_len = 0;
  
  		for (i = 0; i < nmethods; ++i) {
  			/* Skip the -1 entries to speed up sorting */
  			if (amodule->methods [i] == GINT_TO_POINTER (-1))
  				continue;
  			methods [methods_len] = amodule->methods [i];
  			method_indexes [methods_len] = i;
  			methods_len ++;
  		}
  		/* Use a merge sort as this is mostly sorted */
  		msort_method_addresses (methods, method_indexes, methods_len);
  		for (i = 0; i < methods_len -1; ++i)
  			g_assert (methods [i] <= methods [i + 1]);
  		amodule->sorted_methods_len = methods_len;
  		if (mono_atomic_cas_ptr ((gpointer*)&amodule->sorted_methods, methods, NULL) != NULL)
  			/* Somebody got in before us */
  			g_free (methods);
  		if (mono_atomic_cas_ptr ((gpointer*)&amodule->sorted_method_indexes, method_indexes, NULL) != NULL)
  			/* Somebody got in before us */
  			g_free (method_indexes);
  	}
  
  	/* Binary search in the sorted_methods table */
  	methods = amodule->sorted_methods;
  	methods_len = amodule->sorted_methods_len;
  	code = (guint8 *)addr;
  	left = 0;
  	right = methods_len;
  	while (TRUE) {
  		pos = (left + right) / 2;
  
  		code1 = (guint8 *)methods [pos];
  		if (pos + 1 == methods_len) {
  			if (code1 >= amodule->jit_code_start && code1 < amodule->jit_code_end)
  				code2 = amodule->jit_code_end;
  			else
  				code2 = amodule->llvm_code_end;
  		} else {
  			code2 = (guint8 *)methods [pos + 1];
  		}
  
  		if (code < code1)
  			right = pos;
  		else if (code >= code2)
  			left = pos + 1;
  		else
  			break;
  	}
  
  	g_assert (addr >= methods [pos]);
  	if (pos + 1 < methods_len)
  		g_assert (addr < methods [pos + 1]);
  	method_index = amodule->sorted_method_indexes [pos];
  
  	/* In async mode, jinfo is not added to the normal jit info table, so have to cache it ourselves */
  	if (async) {
  		JitInfoMap *table = amodule->async_jit_info_table;
  		int len;
  
  		if (table) {
  			len = table [0].method_index;
  			for (i = 1; i < len; ++i) {
  				if (table [i].method_index == method_index)
  					return table [i].jinfo;
  			}
  		}
  	}
  
  	code = (guint8 *)amodule->methods [method_index];
  	ex_info = &amodule->blob [mono_aot_get_offset (amodule->ex_info_offsets, method_index)];
  
  	if (pos == methods_len - 1) {
  		if (code >= amodule->jit_code_start && code < amodule->jit_code_end)
  			code_len = amodule->jit_code_end - code;
  		else
  			code_len = amodule->llvm_code_end - code;
  	} else {
  		code_len = (guint8*)methods [pos + 1] - (guint8*)methods [pos];
  	}
  
  	g_assert ((guint8*)code <= (guint8*)addr && (guint8*)addr < (guint8*)code + code_len);
  
  	/* Might be a wrapper/extra method */
  	if (!async) {
  		if (amodule->extra_methods) {
  			amodule_lock (amodule);
  			method = (MonoMethod *)g_hash_table_lookup (amodule->extra_methods, GUINT_TO_POINTER (method_index));
  			amodule_unlock (amodule);
  		} else {
  			method = NULL;
  		}
  
  		if (!method) {
  			if (method_index >= image->tables [MONO_TABLE_METHOD].rows) {
  				/*
  				 * This is hit for extra methods which are called directly, so they are
  				 * not in amodule->extra_methods.
  				 */
  				table_len = amodule->extra_method_info_offsets [0];
  				table = amodule->extra_method_info_offsets + 1;
  				left = 0;
  				right = table_len;
  				pos = 0;
  
  				/* Binary search */
  				while (TRUE) {
  					pos = ((left + right) / 2);
  
  					g_assert (pos < table_len);
  
  					if (table [pos * 2] < method_index)
  						left = pos + 1;
  					else if (table [pos * 2] > method_index)
  						right = pos;
  					else
  						break;
  				}
  
  				p = amodule->blob + table [(pos * 2) + 1];
  				method = decode_resolve_method_ref (amodule, p, &p, error);
  				mono_error_cleanup (error); /* FIXME don't swallow the error */
  				if (!method)
  					/* Happens when a random address is passed in which matches a not-yey called wrapper encoded using its name */
  					return NULL;
  			} else {
  				ERROR_DECL (error);
  				token = mono_metadata_make_token (MONO_TABLE_METHOD, method_index + 1);
  				method = mono_get_method_checked (image, token, NULL, NULL, error);
  				if (!method)
  					g_error ("AOT runtime could not load method due to %s", mono_error_get_message (error)); /* FIXME don't swallow the error */
  			}
  		}
  		/* FIXME: */
  		g_assert (method);
  	}
  
  	//printf ("F: %s\n", mono_method_full_name (method, TRUE));
  
  	jinfo = decode_exception_debug_info (amodule, domain, method, ex_info, code, code_len);
  
  	g_assert ((guint8*)addr >= (guint8*)jinfo->code_start);
  
  	/* Add it to the normal JitInfo tables */
  	if (async) {
  		JitInfoMap *old_table, *new_table;
  		int len;
  
  		/*
  		 * Use a simple inmutable table with linear search to cache async jit info entries.
  		 * This assumes that the number of entries is small.
  		 */
  		while (TRUE) {
  			/* Copy the table, adding a new entry at the end */
  			old_table = amodule->async_jit_info_table;
  			if (old_table)
  				len = old_table[0].method_index;
  			else
  				len = 1;
  			new_table = (JitInfoMap *)alloc0_jit_info_data (domain, (len + 1) * sizeof (JitInfoMap), async);
  			if (old_table)
  				memcpy (new_table, old_table, len * sizeof (JitInfoMap));
  			new_table [0].method_index = len + 1;
  			new_table [len].method_index = method_index;
  			new_table [len].jinfo = jinfo;
  			/* Publish it */
  			mono_memory_barrier ();
  			if (mono_atomic_cas_ptr ((volatile gpointer *)&amodule->async_jit_info_table, new_table, old_table) == old_table)
  				break;
  		}
  	} else {
  		mono_jit_info_table_add (domain, jinfo);
  	}
  
  	if ((guint8*)addr >= (guint8*)jinfo->code_start + jinfo->code_size)
  		/* addr is in the padding between methods, see the adjustment of code_size in decode_exception_debug_info () */
  		return NULL;
  	
  	return jinfo;
  }
  
  static gboolean
  decode_patch (MonoAotModule *aot_module, MonoMemPool *mp, MonoJumpInfo *ji, guint8 *buf, guint8 **endbuf)
  {
  	ERROR_DECL (error);
  	guint8 *p = buf;
  	gpointer *table;
  	MonoImage *image;
  	int i;
  
  	switch (ji->type) {
  	case MONO_PATCH_INFO_METHOD:
  	case MONO_PATCH_INFO_METHOD_JUMP:
  	case MONO_PATCH_INFO_METHOD_FTNDESC:
  	case MONO_PATCH_INFO_ICALL_ADDR:
  	case MONO_PATCH_INFO_ICALL_ADDR_CALL:
  	case MONO_PATCH_INFO_METHOD_RGCTX:
  	case MONO_PATCH_INFO_METHOD_CODE_SLOT: {
  		MethodRef ref;
  		gboolean res;
  
  		res = decode_method_ref (aot_module, &ref, p, &p, error);
  		mono_error_assert_ok (error); /* FIXME don't swallow the error */
  		if (!res)
  			goto cleanup;
  
  		if (!ref.method && !mono_aot_only && !ref.no_aot_trampoline && (ji->type == MONO_PATCH_INFO_METHOD) && (mono_metadata_token_table (ref.token) == MONO_TABLE_METHOD)) {
  			ji->data.target = mono_create_ftnptr (mono_domain_get (), mono_create_jit_trampoline_from_token (ref.image, ref.token));
  			ji->type = MONO_PATCH_INFO_ABS;
  		}
  		else {
  			if (ref.method) {
  				ji->data.method = ref.method;
  			}else {
  				ERROR_DECL (error);
  				ji->data.method = mono_get_method_checked (ref.image, ref.token, NULL, NULL, error);
  				if (!ji->data.method)
  					g_error ("AOT Runtime could not load method due to %s", mono_error_get_message (error)); /* FIXME don't swallow the error */
  			}
  			g_assert (ji->data.method);
  			mono_class_init_internal (ji->data.method->klass);
  		}
  		break;
  	}
  	case MONO_PATCH_INFO_LDSTR_LIT:
  	{
  		guint32 len = decode_value (p, &p);
  
  		ji->data.name = (char*)p;
  		p += len + 1;
  		break;
  	}
  	case MONO_PATCH_INFO_METHODCONST:
  		/* Shared */
  		ji->data.method = decode_resolve_method_ref (aot_module, p, &p, error);
  		mono_error_cleanup (error); /* FIXME don't swallow the error */
  		if (!ji->data.method)
  			goto cleanup;
  		break;
  	case MONO_PATCH_INFO_VTABLE:
  	case MONO_PATCH_INFO_CLASS:
  	case MONO_PATCH_INFO_IID:
  	case MONO_PATCH_INFO_ADJUSTED_IID:
  		/* Shared */
  		ji->data.klass = decode_klass_ref (aot_module, p, &p, error);
  		mono_error_cleanup (error); /* FIXME don't swallow the error */
  		if (!ji->data.klass)
  			goto cleanup;
  		break;
  	case MONO_PATCH_INFO_DELEGATE_TRAMPOLINE:
  		ji->data.del_tramp = (MonoDelegateClassMethodPair *)mono_mempool_alloc0 (mp, sizeof (MonoDelegateClassMethodPair));
  		ji->data.del_tramp->klass = decode_klass_ref (aot_module, p, &p, error);
  		mono_error_cleanup (error); /* FIXME don't swallow the error */
  		if (!ji->data.del_tramp->klass)
  			goto cleanup;
  		if (decode_value (p, &p)) {
  			ji->data.del_tramp->method = decode_resolve_method_ref (aot_module, p, &p, error);
  			mono_error_cleanup (error); /* FIXME don't swallow the error */
  			if (!ji->data.del_tramp->method)
  				goto cleanup;
  		}
  		ji->data.del_tramp->is_virtual = decode_value (p, &p) ? TRUE : FALSE;
  		break;
  	case MONO_PATCH_INFO_IMAGE:
  		ji->data.image = load_image (aot_module, decode_value (p, &p), error);
  		mono_error_cleanup (error); /* FIXME don't swallow the error */
  		if (!ji->data.image)
  			goto cleanup;
  		break;
  	case MONO_PATCH_INFO_FIELD:
  	case MONO_PATCH_INFO_SFLDA:
  		/* Shared */
  		ji->data.field = decode_field_info (aot_module, p, &p);
  		if (!ji->data.field)
  			goto cleanup;
  		break;
  	case MONO_PATCH_INFO_SWITCH:
  		ji->data.table = (MonoJumpInfoBBTable *)mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoBBTable));
  		ji->data.table->table_size = decode_value (p, &p);
  		table = (void **)mono_domain_alloc (mono_domain_get (), sizeof (gpointer) * ji->data.table->table_size);
  		ji->data.table->table = (MonoBasicBlock**)table;
  		for (i = 0; i < ji->data.table->table_size; i++)
  			table [i] = (gpointer)(gssize)decode_value (p, &p);
  		break;
  	case MONO_PATCH_INFO_R4:
  	case MONO_PATCH_INFO_R4_GOT: {
  		guint32 val;
  		
  		ji->data.target = mono_domain_alloc0 (mono_domain_get (), sizeof (float));
  		val = decode_value (p, &p);
  		*(float*)ji->data.target = *(float*)&val;
  		break;
  	}
  	case MONO_PATCH_INFO_R8:
  	case MONO_PATCH_INFO_R8_GOT: {
  		guint32 val [2];
  		guint64 v;
  
  		// FIXME: Align to 16 bytes ?
  		ji->data.target = mono_domain_alloc0 (mono_domain_get (), sizeof (double));
  
  		val [0] = decode_value (p, &p);
  		val [1] = decode_value (p, &p);
  		v = ((guint64)val [1] << 32) | ((guint64)val [0]);
  		*(double*)ji->data.target = *(double*)&v;
  		break;
  	}
  	case MONO_PATCH_INFO_LDSTR:
  		image = load_image (aot_module, decode_value (p, &p), error);
  		mono_error_cleanup (error); /* FIXME don't swallow the error */
  		if (!image)
  			goto cleanup;
  		ji->data.token = mono_jump_info_token_new (mp, image, MONO_TOKEN_STRING + decode_value (p, &p));
  		break;
  	case MONO_PATCH_INFO_RVA:
  	case MONO_PATCH_INFO_DECLSEC:
  	case MONO_PATCH_INFO_LDTOKEN:
  	case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
  		/* Shared */
  		image = load_image (aot_module, decode_value (p, &p), error);
  		mono_error_cleanup (error); /* FIXME don't swallow the error */
  		if (!image)
  			goto cleanup;
  		ji->data.token = mono_jump_info_token_new (mp, image, decode_value (p, &p));
  
  		ji->data.token->has_context = decode_value (p, &p);
  		if (ji->data.token->has_context) {
  			gboolean res = decode_generic_context (aot_module, &ji->data.token->context, p, &p, error);
  			mono_error_cleanup (error); /* FIXME don't swallow the error */
  			if (!res)
  				goto cleanup;
  		}
  		break;
  	case MONO_PATCH_INFO_EXC_NAME:
  		ji->data.klass = decode_klass_ref (aot_module, p, &p, error);
  		mono_error_cleanup (error); /* FIXME don't swallow the error */
  		if (!ji->data.klass)
  			goto cleanup;
  		ji->data.name = m_class_get_name (ji->data.klass);
  		break;
  	case MONO_PATCH_INFO_INTERRUPTION_REQUEST_FLAG:
  	case MONO_PATCH_INFO_GC_CARD_TABLE_ADDR:
  	case MONO_PATCH_INFO_GC_NURSERY_START:
  	case MONO_PATCH_INFO_GC_NURSERY_BITS:
  	case MONO_PATCH_INFO_PROFILER_ALLOCATION_COUNT:
  	case MONO_PATCH_INFO_PROFILER_CLAUSE_COUNT:
  		break;
  	case MONO_PATCH_INFO_SPECIFIC_TRAMPOLINE_LAZY_FETCH_ADDR:
  		ji->data.uindex = decode_value (p, &p);
  		break;
  	case MONO_PATCH_INFO_CASTCLASS_CACHE:
  		ji->data.index = decode_value (p, &p);
  		break;
  	case MONO_PATCH_INFO_JIT_ICALL_ID:
  	case MONO_PATCH_INFO_JIT_ICALL_ADDR:
  	case MONO_PATCH_INFO_JIT_ICALL_ADDR_NOCALL:
  		ji->data.jit_icall_id = (MonoJitICallId)decode_value (p, &p);
  		break;
  	case MONO_PATCH_INFO_RGCTX_FETCH:
  	case MONO_PATCH_INFO_RGCTX_SLOT_INDEX: {
  		gboolean res;
  		MonoJumpInfoRgctxEntry *entry;
  		guint32 offset, val;
  		guint8 *p2;
  
  		offset = decode_value (p, &p);
  		val = decode_value (p, &p);
  
  		entry = (MonoJumpInfoRgctxEntry *)mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoRgctxEntry));
  		p2 = aot_module->blob + offset;
  		entry->in_mrgctx = ((val & 1) > 0) ? TRUE : FALSE;
  		if (entry->in_mrgctx)
  			entry->d.method = decode_resolve_method_ref (aot_module, p2, &p2, error);
  		else
  			entry->d.klass = decode_klass_ref (aot_module, p2, &p2, error);
  		entry->info_type = (MonoRgctxInfoType)((val >> 1) & 0xff);
  		entry->data = (MonoJumpInfo *)mono_mempool_alloc0 (mp, sizeof (MonoJumpInfo));
  		entry->data->type = (MonoJumpInfoType)((val >> 9) & 0xff);
  		mono_error_cleanup (error); /* FIXME don't swallow the error */
  		
  		res = decode_patch (aot_module, mp, entry->data, p, &p);
  		if (!res)
  			goto cleanup;
  		ji->data.rgctx_entry = entry;
  		break;
  	}
  	case MONO_PATCH_INFO_SEQ_POINT_INFO:
  	case MONO_PATCH_INFO_AOT_MODULE:
  	case MONO_PATCH_INFO_MSCORLIB_GOT_ADDR:
  		break;
  	case MONO_PATCH_INFO_SIGNATURE:
  	case MONO_PATCH_INFO_GSHAREDVT_IN_WRAPPER:
  		ji->data.target = decode_signature (aot_module, p, &p);
  		break;
  	case MONO_PATCH_INFO_GSHAREDVT_CALL: {
  		MonoJumpInfoGSharedVtCall *info = (MonoJumpInfoGSharedVtCall *)mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoGSharedVtCall));
  		info->sig = decode_signature (aot_module, p, &p);
  		g_assert (info->sig);
  		info->method = decode_resolve_method_ref (aot_module, p, &p, error);
  		mono_error_assert_ok (error); /* FIXME don't swallow the error */
  
  		ji->data.target = info;
  		break;
  	}
  	case MONO_PATCH_INFO_GSHAREDVT_METHOD: {
  		MonoGSharedVtMethodInfo *info = (MonoGSharedVtMethodInfo *)mono_mempool_alloc0 (mp, sizeof (MonoGSharedVtMethodInfo));
  		int i;
  		
  		info->method = decode_resolve_method_ref (aot_module, p, &p, error);
  		mono_error_assert_ok (error); /* FIXME don't swallow the error */
  
  		info->num_entries = decode_value (p, &p);
  		info->count_entries = info->num_entries;
  		info->entries = (MonoRuntimeGenericContextInfoTemplate *)mono_mempool_alloc0 (mp, sizeof (MonoRuntimeGenericContextInfoTemplate) * info->num_entries);
  		for (i = 0; i < info->num_entries; ++i) {
  			MonoRuntimeGenericContextInfoTemplate *template_ = &info->entries [i];
  
  			template_->info_type = (MonoRgctxInfoType)decode_value (p, &p);
  			switch (mini_rgctx_info_type_to_patch_info_type (template_->info_type)) {
  			case MONO_PATCH_INFO_CLASS: {
  				MonoClass *klass = decode_klass_ref (aot_module, p, &p, error);
  				mono_error_cleanup (error); /* FIXME don't swallow the error */
  				if (!klass)
  					goto cleanup;
  				template_->data = m_class_get_byval_arg (klass);
  				break;
  			}
  			case MONO_PATCH_INFO_FIELD:
  				template_->data = decode_field_info (aot_module, p, &p);
  				if (!template_->data)
  					goto cleanup;
  				break;
  			default:
  				g_assert_not_reached ();
  				break;
  			}
  		}
  		ji->data.target = info;
  		break;
  	}
  	case MONO_PATCH_INFO_VIRT_METHOD: {
  		MonoJumpInfoVirtMethod *info = (MonoJumpInfoVirtMethod *)mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoVirtMethod));
  
  		info->klass = decode_klass_ref (aot_module, p, &p, error);
  		mono_error_assert_ok (error); /* FIXME don't swallow the error */
  
  		info->method = decode_resolve_method_ref (aot_module, p, &p, error);
  		mono_error_assert_ok (error); /* FIXME don't swallow the error */
  
  		ji->data.target = info;
  		break;
  	}
  	case MONO_PATCH_INFO_GC_SAFE_POINT_FLAG:
  	case MONO_PATCH_INFO_SPECIFIC_TRAMPOLINES:
  	case MONO_PATCH_INFO_SPECIFIC_TRAMPOLINES_GOT_SLOTS_BASE:
  		break;
  	case MONO_PATCH_INFO_AOT_JIT_INFO:
  		ji->data.index = decode_value (p, &p);
  		break;
  	default:
  		g_error ("unhandled type %d", ji->type);
  		break;
  	}
  
  	*endbuf = p;
  
  	return TRUE;
  
   cleanup:
  	return FALSE;
  }
  
  /*
   * decode_patches:
   *
   *    Decode a list of patches identified by the got offsets in GOT_OFFSETS. Return an array of
   * MonoJumpInfo structures allocated from MP. GOT entries already loaded have their
   * ji->type set to MONO_PATCH_INFO_NONE.
   */
  static MonoJumpInfo*
  decode_patches (MonoAotModule *amodule, MonoMemPool *mp, int n_patches, gboolean llvm, guint32 *got_offsets)
  {
  	MonoJumpInfo *patches;
  	MonoJumpInfo *ji;
  	gpointer *got;
  	guint32 *got_info_offsets;
  	int i;
  	gboolean res;
  
  	if (llvm) {
  		got = amodule->llvm_got;
  		got_info_offsets = (guint32 *)amodule->llvm_got_info_offsets;
  	} else {
  		got = amodule->got;
  		got_info_offsets = (guint32 *)amodule->got_info_offsets;
  	}
  
  	patches = (MonoJumpInfo *)mono_mempool_alloc0 (mp, sizeof (MonoJumpInfo) * n_patches);
  	for (i = 0; i < n_patches; ++i) {
  		guint8 *p = amodule->blob + mono_aot_get_offset (got_info_offsets, got_offsets [i]);
  
  		ji = &patches [i];
  		ji->type = (MonoJumpInfoType)decode_value (p, &p);
  
  		/* See load_method () for SFLDA */
  		if (got && got [got_offsets [i]] && ji->type != MONO_PATCH_INFO_SFLDA) {
  			/* Already loaded */
  			ji->type = MONO_PATCH_INFO_NONE;
  		} else {
  			res = decode_patch (amodule, mp, ji, p, &p);
  			if (!res)
  				return NULL;
  		}
  	}
  
  	return patches;
  }
  
  static MonoJumpInfo*
  load_patch_info (MonoAotModule *amodule, MonoMemPool *mp, int n_patches,
  				 gboolean llvm, guint32 **got_slots,
  				 guint8 *buf, guint8 **endbuf)
  {
  	MonoJumpInfo *patches;
  	int pindex;
  	guint8 *p;
  
  	p = buf;
  
  	*got_slots = (guint32 *)g_malloc (sizeof (guint32) * n_patches);
  	for (pindex = 0; pindex < n_patches; ++pindex) {
  		(*got_slots)[pindex] = decode_value (p, &p);
  	}
  
  	patches = decode_patches (amodule, mp, n_patches, llvm, *got_slots);
  	if (!patches) {
  		g_free (*got_slots);
  		*got_slots = NULL;
  		return NULL;
  	}
  
  	*endbuf = p;
  	return patches;
  }
  
  static void
  register_jump_target_got_slot (MonoDomain *domain, MonoMethod *method, gpointer *got_slot)
  {
  	/*
  	 * Jump addresses cannot be patched by the trampoline code since it
  	 * does not have access to the caller's address. Instead, we collect
  	 * the addresses of the GOT slots pointing to a method, and patch
  	 * them after the method has been compiled.
  	 */
  	MonoJitDomainInfo *info = domain_jit_info (domain);
  	GSList *list;
  	MonoMethod *shared_method = mini_method_to_shared (method);
  	method = shared_method ? shared_method : method;
  		
  	mono_domain_lock (domain);
  	if (!info->jump_target_got_slot_hash)
  		info->jump_target_got_slot_hash = g_hash_table_new (NULL, NULL);
  	list = (GSList *)g_hash_table_lookup (info->jump_target_got_slot_hash, method);
  	list = g_slist_prepend (list, got_slot);
  	g_hash_table_insert (info->jump_target_got_slot_hash, method, list);
  	mono_domain_unlock (domain);
  }
  
  /*
   * load_method:
   *
   *   Load the method identified by METHOD_INDEX from the AOT image. Return a
   * pointer to the native code of the method, or NULL if not found.
   * METHOD might not be set if the caller only has the image/token info.
   */
  static gpointer
  load_method (MonoDomain *domain, MonoAotModule *amodule, MonoImage *image, MonoMethod *method, guint32 token, int method_index,
  			 MonoError *error)
  {
  	MonoJitInfo *jinfo = NULL;
  	guint8 *code = NULL, *info;
  	gboolean res;
  
  	error_init (error);
  
  	init_amodule_got (amodule, FALSE);
  
  	if (domain != mono_get_root_domain ())
  		/* Non shared AOT code can't be used in other appdomains */
  		return NULL;
  
  	if (amodule->out_of_date)
  		return NULL;
  
  	if (amodule->info.llvm_get_method) {
  		/*
  		 * Obtain the method address by calling a generated function in the LLVM module.
  		 */
  		gpointer (*get_method) (int) = (gpointer (*)(int))amodule->info.llvm_get_method;
  		code = (guint8 *)get_method (method_index);
  	}
  
  	if (!code) {
  		if (method_index < amodule->info.nmethods)
  			code = (guint8 *)amodule->methods [method_index];
  		else
  			return NULL;
  
  		/* JITted method */
  		if (amodule->methods [method_index] == GINT_TO_POINTER (-1)) {
  			if (mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
  				char *full_name;
  
  				if (!method) {
  					method = mono_get_method_checked (image, token, NULL, NULL, error);
  					if (!method)
  						return NULL;
  				}
  				if (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
  					full_name = mono_method_full_name (method, TRUE);
  					mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: NOT FOUND: %s.", full_name);
  					g_free (full_name);
  				}
  			}
  			return NULL;
  		}
  	}
  
  	info = &amodule->blob [mono_aot_get_offset (amodule->method_info_offsets, method_index)];
  
  	if (!amodule->methods_loaded) {
  		amodule_lock (amodule);
  		if (!amodule->methods_loaded) {
  			guint32 *loaded;
  
  			loaded = g_new0 (guint32, amodule->info.nmethods / 32 + 1);
  			mono_memory_barrier ();
  			amodule->methods_loaded = loaded;
  		}
  		amodule_unlock (amodule);
  	}
  
  	if ((amodule->methods_loaded [method_index / 32] >> (method_index % 32)) & 0x1)
  		return code;
  
  	if (mini_debug_options.aot_skip_set && !(method && method->wrapper_type)) {
  		gint32 methods_aot = mono_atomic_load_i32 (&mono_jit_stats.methods_aot);
  		methods_aot += mono_atomic_load_i32 (&mono_jit_stats.methods_aot_llvm);
  		if (methods_aot == mini_debug_options.aot_skip) {
  			if (!method) {
  				method = mono_get_method_checked (image, token, NULL, NULL, error);
  				if (!method)
  					return NULL;
  			}
  			if (method) {
  				char *name = mono_method_full_name (method, TRUE);
  				g_print ("NON AOT METHOD: %s.\n", name);
  				g_free (name);
  			} else {
  				g_print ("NON AOT METHOD: %p %d\n", code, method_index);
  			}
  			mini_debug_options.aot_skip_set = FALSE;
  			return NULL;
  		}
  	}
  
  	if (mono_last_aot_method != -1) {
  		gint32 methods_aot = mono_atomic_load_i32 (&mono_jit_stats.methods_aot);
  		methods_aot += mono_atomic_load_i32 (&mono_jit_stats.methods_aot_llvm);
  		if (methods_aot >= mono_last_aot_method)
  			return NULL;
  		else if (methods_aot == mono_last_aot_method - 1) {
  			if (!method) {
  				method = mono_get_method_checked (image, token, NULL, NULL, error);
  				if (!method)
  					return NULL;
  			}
  			if (method) {
  				char *name = mono_method_full_name (method, TRUE);
  				g_print ("LAST AOT METHOD: %s.\n", name);
  				g_free (name);
  			} else {
  				g_print ("LAST AOT METHOD: %p %d\n", code, method_index);
  			}
  		}
  	}
  
  	if (!(is_llvm_code (amodule, code) && (amodule->info.flags & MONO_AOT_FILE_FLAG_LLVM_ONLY)) ||
  		(mono_llvm_only && method && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED)) {
  		/* offset == 0 means its llvm code */
  		if (mono_aot_get_offset (amodule->method_info_offsets, method_index) != 0) {
  			res = init_method (amodule, NULL, method_index, method, NULL, error);
  			if (!res)
  				goto cleanup;
  		}
  	}
  
  	if (mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
  		char *full_name;
  
  		if (!method) {
  			method = mono_get_method_checked (image, token, NULL, NULL, error);
  			if (!method)
  				return NULL;
  		}
  
  		full_name = mono_method_full_name (method, TRUE);
  
  		if (!jinfo)
  			jinfo = mono_aot_find_jit_info (domain, amodule->assembly->image, code);
  
  		mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: FOUND method %s [%p - %p %p]", full_name, code, code + jinfo->code_size, info);
  		g_free (full_name);
  	}
  
  	if (mono_llvm_only) {
  		guint8 flags = amodule->method_flags_table [method_index];
  		/* The caller needs to looks this up, but its hard to do without constructing the full MonoJitInfo, so save it here */
  		if (flags & MONO_AOT_METHOD_FLAG_GSHAREDVT_VARIABLE) {
  			mono_aot_lock ();
  			if (!code_to_method_flags)
  				code_to_method_flags = g_hash_table_new (NULL, NULL);
  			g_hash_table_insert (code_to_method_flags, code, GUINT_TO_POINTER (flags));
  			mono_aot_unlock ();
  		}
  	}
  
  	init_plt (amodule);
  
  	amodule_lock (amodule);
  
  	if (is_llvm_code (amodule, code))
  		mono_atomic_inc_i32 (&mono_jit_stats.methods_aot_llvm);
  	else
  		mono_atomic_inc_i32 (&mono_jit_stats.methods_aot);
  
  	if (method && method->wrapper_type)
  		g_hash_table_insert (amodule->method_to_code, method, code);
  
  	/* Commit changes since methods_loaded is accessed outside the lock */
  	mono_memory_barrier ();
  
  	amodule->methods_loaded [method_index / 32] |= 1 << (method_index % 32);
  
  	amodule_unlock (amodule);
  
  	if (MONO_PROFILER_ENABLED (jit_begin) || MONO_PROFILER_ENABLED (jit_done)) {
  		MonoJitInfo *jinfo;
  
  		if (!method) {
  			method = mono_get_method_checked (amodule->assembly->image, token, NULL, NULL, error);
  			if (!method)
  				return NULL;
  		}
  		MONO_PROFILER_RAISE (jit_begin, (method));
  		jinfo = mono_jit_info_table_find (domain, code);
  		g_assert (jinfo);
  		MONO_PROFILER_RAISE (jit_done, (method, jinfo));
  	}
  
  	return code;
  
   cleanup:
  	if (jinfo)
  		g_free (jinfo);
  
  	return NULL;
  }
  
  /** find_aot_method_in_amodule
  	* 
  	* \param code_amodule The AOT module containing the code pointer
  	* \param method The method to find the code index for
  	* \param hash_full The hash for the method
  	*/
  static guint32
  find_aot_method_in_amodule (MonoAotModule *code_amodule, MonoMethod *method, guint32 hash_full)
  {
  	ERROR_DECL (error);
  	guint32 table_size, entry_size, hash;
  	guint32 *table, *entry;
  	guint32 index;
  	static guint32 n_extra_decodes;
  
  	// The AOT module containing the MonoMethod 
  	// The reference to the metadata amodule will differ among multiple dedup methods
  	// which mangle to the same name but live in different assemblies. This leads to
  	// the caching breaking. The solution seems to be to cache using the "metadata" amodule.
  	MonoAotModule *metadata_amodule = m_class_get_image (method->klass)->aot_module;
  
  	if (!metadata_amodule || metadata_amodule->out_of_date || !code_amodule || code_amodule->out_of_date)
  		return 0xffffff;
  
  	table_size = code_amodule->extra_method_table [0];
  	hash = hash_full % table_size;
  	table = code_amodule->extra_method_table + 1;
  	entry_size = 3;
  
  	entry = &table [hash * entry_size];
  
  	if (entry [0] == 0)
  		return 0xffffff;
  
  	index = 0xffffff;
  	while (TRUE) {
  		guint32 key = entry [0];
  		guint32 value = entry [1];
  		guint32 next = entry [entry_size - 1];
  		MonoMethod *m;
  		guint8 *p, *orig_p;
  
  		p = code_amodule->blob + key;
  		orig_p = p;
  
  		amodule_lock (metadata_amodule);
  		if (!metadata_amodule->method_ref_to_method)
  			metadata_amodule->method_ref_to_method = g_hash_table_new (NULL, NULL);
  		m = (MonoMethod *)g_hash_table_lookup (metadata_amodule->method_ref_to_method, p);
  		amodule_unlock (metadata_amodule);
  		if (!m) {
  			m = decode_resolve_method_ref_with_target (code_amodule, method, p, &p, error);
  			mono_error_cleanup (error); /* FIXME don't swallow the error */
  			/*
  			 * Can't catche runtime invoke wrappers since it would break
  			 * the check in decode_method_ref_with_target ().
  			 */
  			if (m && m->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE) {
  				amodule_lock (metadata_amodule);
  				g_hash_table_insert (metadata_amodule->method_ref_to_method, orig_p, m);
  				amodule_unlock (metadata_amodule);
  			}
  		}
  		if (m == method) {
  			index = value;
  			break;
  		}
  
  		/* Methods decoded needlessly */
  		if (m) {
  			//printf ("%d %s %s %p\n", n_extra_decodes, mono_method_full_name (method, TRUE), mono_method_full_name (m, TRUE), orig_p);
  			n_extra_decodes ++;
  		}
  
  		if (next != 0)
  			entry = &table [next * entry_size];
  		else
  			break;
  	}
  
  	if (index != 0xffffff)
  		g_assert (index < code_amodule->info.nmethods);
  
  	return index;
  }
  
  static void
  add_module_cb (gpointer key, gpointer value, gpointer user_data)
  {
  	g_ptr_array_add ((GPtrArray*)user_data, value);
  }
  
  gboolean
  mono_aot_can_dedup (MonoMethod *method)
  {
  #ifdef TARGET_WASM
  	/* Use a set of wrappers/instances which work and useful */
  	switch (method->wrapper_type) {
  	case MONO_WRAPPER_RUNTIME_INVOKE:
  		return TRUE;
  		break;
  	case MONO_WRAPPER_OTHER: {
  		WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  		if (info->subtype == WRAPPER_SUBTYPE_PTR_TO_STRUCTURE ||
  			info->subtype == WRAPPER_SUBTYPE_STRUCTURE_TO_PTR ||
  			info->subtype == WRAPPER_SUBTYPE_INTERP_LMF ||
  			info->subtype == WRAPPER_SUBTYPE_AOT_INIT)
  			return FALSE;
  		return TRUE;
  	}
  	default:
  		break;
  	}
  
  	if (method->is_inflated && !mono_method_is_generic_sharable_full (method, TRUE, FALSE, FALSE) &&
  		!mini_is_gsharedvt_signature (mono_method_signature_internal (method)) &&
  		!mini_is_gsharedvt_klass (method->klass))
  		return TRUE;
  
  	return FALSE;
  #else
  	gboolean not_normal_gshared = method->is_inflated && !mono_method_is_generic_sharable_full (method, TRUE, FALSE, FALSE);
  	gboolean extra_method = (method->wrapper_type != MONO_WRAPPER_NONE) || not_normal_gshared;
  
  	return extra_method;
  #endif
  }
  
  
  /*
   * find_aot_method:
   *
   *   Try finding METHOD in the extra_method table in all AOT images.
   * Return its method index, or 0xffffff if not found. Set OUT_AMODULE to the AOT
   * module where the method was found.
   */
  static guint32
  find_aot_method (MonoMethod *method, MonoAotModule **out_amodule)
  {
  	guint32 index;
  	GPtrArray *modules;
  	int i;
  	guint32 hash = mono_aot_method_hash (method);
  
  	/* Try the place we expect to have moved the method only 
  	 * We don't probe, as that causes hard-to-debug issues when we fail
  	 * to find the method */
  	if (container_amodule && mono_aot_can_dedup (method)) {
  		*out_amodule = container_amodule;
  		index = find_aot_method_in_amodule (container_amodule, method, hash);
  		return index;
  	}
  
  	/* Try the method's module first */
  	*out_amodule = m_class_get_image (method->klass)->aot_module;
  	index = find_aot_method_in_amodule (m_class_get_image (method->klass)->aot_module, method, hash);
  	if (index != 0xffffff)
  		return index;
  
  	/* 
  	 * Try all other modules.
  	 * This is needed because generic instances klass->image points to the image
  	 * containing the generic definition, but the native code is generated to the
  	 * AOT image which contains the reference.
  	 */
  
  	/* Make a copy to avoid doing the search inside the aot lock */
  	modules = g_ptr_array_new ();
  	mono_aot_lock ();
  	g_hash_table_foreach (aot_modules, add_module_cb, modules);
  	mono_aot_unlock ();
  
  	index = 0xffffff;
  	for (i = 0; i < modules->len; ++i) {
  		MonoAotModule *amodule = (MonoAotModule *)g_ptr_array_index (modules, i);
  
  		if (amodule != m_class_get_image (method->klass)->aot_module)
  			index = find_aot_method_in_amodule (amodule, method, hash);
  		if (index != 0xffffff) {
  			*out_amodule = amodule;
  			break;
  		}
  	}
  	
  	g_ptr_array_free (modules, TRUE);
  
  	return index;
  }
  
  guint32
  mono_aot_find_method_index (MonoMethod *method)
  {
  	MonoAotModule *out_amodule;
  	return find_aot_method (method, &out_amodule);
  }
  
  static gboolean
  init_method (MonoAotModule *amodule, gpointer info, guint32 method_index, MonoMethod *method, MonoClass *init_class, MonoError *error)
  {
  	MonoDomain *domain = mono_domain_get ();
  	MonoMemPool *mp;
  	MonoClass *klass_to_run_ctor = NULL;
  	gboolean from_plt = method == NULL;
  	int pindex, n_patches;
  	guint8 *p;
  	MonoJitInfo *jinfo = NULL;
  	guint8 *code;
  	MonoGenericContext *context;
  	MonoGenericContext ctx;
  
  	/* Might be needed if the method is externally called */
  	init_plt (amodule);
  	init_amodule_got (amodule, FALSE);
  
  	memset (&ctx, 0, sizeof (ctx));
  
  	error_init (error);
  
  	if (!info)
  		info = &amodule->blob [mono_aot_get_offset (amodule->method_info_offsets, method_index)];
  
  	p = (guint8*)info;
  
  	// FIXME: Is this aligned ?
  	guint32 encoded_method_index = *(guint32*)p;
  	if (method_index)
  		g_assert (method_index == encoded_method_index);
  	method_index = encoded_method_index;
  	p += 4;
  
  	code = (guint8 *)amodule->methods [method_index];
  	guint8 flags = amodule->method_flags_table [method_index];
  
  	if (flags & MONO_AOT_METHOD_FLAG_HAS_CCTOR)
  		klass_to_run_ctor = decode_klass_ref (amodule, p, &p, error);
  	if (!is_ok (error))
  		return FALSE;
  
  	//FIXME old code would use the class from @method if not null and ignore the one encoded. I don't know if we need to honor that -- @kumpera
  	if (method)
  		klass_to_run_ctor = method->klass;
  
  	context = NULL;
  	if (flags & MONO_AOT_METHOD_FLAG_HAS_CTX) {
  		decode_generic_context (amodule, &ctx, p, &p, error);
  		mono_error_assert_ok (error);
  		context = &ctx;
  	}
  
  	if (flags & MONO_AOT_METHOD_FLAG_HAS_PATCHES)
  		n_patches = decode_value (p, &p);
  	else
  		n_patches = 0;
  
  	if (n_patches) {
  		MonoJumpInfo *patches;
  		guint32 *got_slots;
  		gboolean llvm;
  		gpointer *got;
  
  		mp = mono_mempool_new ();
  
  		if ((gpointer)code >= amodule->info.jit_code_start && (gpointer)code <= amodule->info.jit_code_end) {
  			llvm = FALSE;
  			got = amodule->got;
  		} else {
  			llvm = TRUE;
  			got = amodule->llvm_got;
  			g_assert (got);
  		}
  
  		patches = load_patch_info (amodule, mp, n_patches, llvm, &got_slots, p, &p);
  		if (patches == NULL) {
  			mono_mempool_destroy (mp);
  			goto cleanup;
  		}
  
  		for (pindex = 0; pindex < n_patches; ++pindex) {
  			MonoJumpInfo *ji = &patches [pindex];
  			gpointer addr;
  
  			/*
  			 * For SFLDA, we need to call resolve_patch_target () since the GOT slot could have
  			 * been initialized by load_method () for a static cctor before the cctor has
  			 * finished executing (#23242).
  			 */
  			if (ji->type == MONO_PATCH_INFO_NONE) {
  			} else if (!got [got_slots [pindex]] || ji->type == MONO_PATCH_INFO_SFLDA) {
  				/* In llvm-only made, we might encounter shared methods */
  				if (mono_llvm_only && ji->type == MONO_PATCH_INFO_METHOD && mono_method_check_context_used (ji->data.method)) {
  					g_assert (context);
  					ji->data.method = mono_class_inflate_generic_method_checked (ji->data.method, context, error);
  					if (!is_ok (error)) {
  						g_free (got_slots);
  						mono_mempool_destroy (mp);
  						return FALSE;
  					}
  				}
  				/* This cannot be resolved in mono_resolve_patch_target () */
  				if (ji->type == MONO_PATCH_INFO_AOT_JIT_INFO) {
  					// FIXME: Lookup using the index
  					jinfo = mono_aot_find_jit_info (domain, amodule->assembly->image, code);
  					ji->type = MONO_PATCH_INFO_ABS;
  					ji->data.target = jinfo;
  				}
  				addr = mono_resolve_patch_target (method, domain, code, ji, TRUE, error);
  				if (!is_ok (error)) {
  					g_free (got_slots);
  					mono_mempool_destroy (mp);
  					return FALSE;
  				}
  				if (ji->type == MONO_PATCH_INFO_METHOD_JUMP)
  					addr = mono_create_ftnptr (domain, addr);
  				mono_memory_barrier ();
  				got [got_slots [pindex]] = addr;
  				if (ji->type == MONO_PATCH_INFO_METHOD_JUMP)
  					register_jump_target_got_slot (domain, ji->data.method, &(got [got_slots [pindex]]));
  
  				if (llvm) {
  					void (*init_aotconst) (int, gpointer) = (void (*)(int, gpointer))amodule->info.llvm_init_aotconst;
  					init_aotconst (got_slots [pindex], addr);
  				}
  			}
  			ji->type = MONO_PATCH_INFO_NONE;
  		}
  
  		g_free (got_slots);
  
  		mono_mempool_destroy (mp);
  	}
  
  	if (mini_debug_options.load_aot_jit_info_eagerly)
  		jinfo = mono_aot_find_jit_info (domain, amodule->assembly->image, code);
  
  	gboolean inited_ok;
  	inited_ok = TRUE;
  	if (init_class) {
  		MonoVTable *vt = mono_class_vtable_checked (domain, init_class, error);
  		if (!is_ok (error))
  			inited_ok = FALSE;
  		else
  			inited_ok = mono_runtime_class_init_full (vt, error);
  	} else if (from_plt && klass_to_run_ctor && !mono_class_is_gtd (klass_to_run_ctor)) {
  		MonoVTable *vt = mono_class_vtable_checked (domain, klass_to_run_ctor, error);
  		if (!is_ok (error))
  			inited_ok = FALSE;
  		else
  			inited_ok = mono_runtime_class_init_full (vt, error);
  	}
  	if (!inited_ok)
  		return FALSE;
  
  	return TRUE;
  
   cleanup:
  	if (jinfo)
  		g_free (jinfo);
  
  	return FALSE;
  }
  
  /*
   * mono_aot_init_llvm_method:
   *
   *   Initialize the LLVM method identified by METHOD_INFO.
   */
  gboolean
  mono_aot_init_llvm_method (gpointer aot_module, gpointer method_info, MonoClass *init_class, MonoError *error)
  {
  	MonoAotModule *amodule = (MonoAotModule*)aot_module;
  
  	return init_method (amodule, method_info, 0, NULL, init_class, error);
  }
  
  /*
   * mono_aot_get_method:
   *
   *   Return a pointer to the AOTed native code for METHOD if it can be found,
   * NULL otherwise.
   * On platforms with function pointers, this doesn't return a function pointer.
   */
  gpointer
  mono_aot_get_method (MonoDomain *domain, MonoMethod *method, MonoError *error)
  {
  	MonoClass *klass = method->klass;
  	MonoMethod *orig_method = method;
  	guint32 method_index;
  	MonoAotModule *amodule = m_class_get_image (klass)->aot_module;
  	guint8 *code;
  	gboolean cache_result = FALSE;
  	ERROR_DECL (inner_error);
  
  	error_init (error);
  
  	if (domain != mono_get_root_domain ())
  		/* Non shared AOT code can't be used in other appdomains */
  		return NULL;
  
  	if (enable_aot_cache && !amodule && domain->entry_assembly && mono_is_corlib_image (m_class_get_image (klass))) {
  		/* This cannot be AOTed during startup, so do it now */
  		if (!mscorlib_aot_loaded) {
  			mscorlib_aot_loaded = TRUE;
  			load_aot_module (mono_domain_default_alc (domain), m_class_get_image (klass)->assembly, NULL, error);
  			amodule = m_class_get_image (klass)->aot_module;
  		}
  	}
  
  	if (!amodule)
  		return NULL;
  
  	if (amodule->out_of_date)
  		return NULL;
  
  	if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
  		(method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
  		(method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
  		(method->flags & METHOD_ATTRIBUTE_ABSTRACT))
  		return NULL;
  
  	/* Load the dedup module lazily */
  	load_container_amodule (mono_assembly_get_alc (amodule->assembly));
  
  	/*
  	 * Use the original method instead of its invoke-with-check wrapper.
  	 * This is not a problem when using full-aot, since it doesn't support
  	 * remoting.
  	 */
  	if (mono_aot_only && method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK)
  		return mono_aot_get_method (domain, mono_marshal_method_from_wrapper (method), error);
  
  	g_assert (m_class_is_inited (klass));
  
  	/* Find method index */
  	method_index = 0xffffff;
  
  	gboolean dedupable = mono_aot_can_dedup (method);
  
  	if (method->is_inflated && !method->wrapper_type && mono_method_is_generic_sharable_full (method, TRUE, FALSE, FALSE) && !dedupable) {
  		MonoMethod *orig_method = method;
  		/* 
  		 * For generic methods, we store the fully shared instance in place of the
  		 * original method.
  		 */
  		method = mono_method_get_declaring_generic_method (method);
  		method_index = mono_metadata_token_index (method->token) - 1;
  
  		if (amodule->llvm_code_start) {
  			/* Needed by mini_llvm_init_gshared_method_this () */
  			/* orig_method is a random instance but it is enough to make init_method () work */
  			amodule_lock (amodule);
  			g_hash_table_insert (amodule->extra_methods, GUINT_TO_POINTER (method_index), orig_method);
  			amodule_unlock (amodule);
  		}
  	}
  
  	if (method_index == 0xffffff && (method->is_inflated || !method->token)) {
  		/* This hash table is used to avoid the slower search in the extra_method_table in the AOT image */
  		amodule_lock (amodule);
  		code = (guint8 *)g_hash_table_lookup (amodule->method_to_code, method);
  		amodule_unlock (amodule);
  		if (code)
  			return code;
  
  		cache_result = TRUE;
  		if (method_index == 0xffffff)
  			method_index = find_aot_method (method, &amodule);
  
  		/*
  		 * Special case the ICollection<T> wrappers for arrays, as they cannot
  		 * be statically enumerated, and each wrapper ends up calling the same
  		 * method in Array.
  		 */
  		if (method_index == 0xffffff && method->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED && m_class_get_rank (method->klass) && strstr (method->name, "System.Collections.Generic")) {
  			MonoMethod *m = mono_aot_get_array_helper_from_wrapper (method);
  
  			code = (guint8 *)mono_aot_get_method (domain, m, inner_error);
  			mono_error_cleanup (inner_error);
  			if (code)
  				return code;
  		}
  
  		/*
  		 * Special case Array.GetGenericValue_icall which is a generic icall.
  		 * Generic sharing currently can't handle it, but the icall returns data using
  		 * an out parameter, so the managed-to-native wrappers can share the same code.
  		 */
  		if (method_index == 0xffffff && method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE && method->klass == mono_defaults.array_class && !strcmp (method->name, "GetGenericValue_icall")) {
  			MonoMethod *m;
  			MonoGenericContext ctx;
  
  			if (mono_method_signature_internal (method)->params [1]->type == MONO_TYPE_OBJECT)
  				/* Avoid recursion */
  				return NULL;
  
  			m = mono_class_get_method_from_name_checked (mono_defaults.array_class, "GetGenericValue_icall", 3, 0, error);
  			mono_error_assert_ok (error);
  			g_assert (m);
  
  			memset (&ctx, 0, sizeof (ctx));
  			MonoType *args [ ] = { m_class_get_byval_arg (mono_defaults.object_class) };
  			ctx.method_inst = mono_metadata_get_generic_inst (1, args);
  
  			m = mono_marshal_get_native_wrapper (mono_class_inflate_generic_method_checked (m, &ctx, error), TRUE, TRUE);
  			if (!m)
  				g_error ("AOT runtime could not load method due to %s", mono_error_get_message (error)); /* FIXME don't swallow the error */
  
  			/* 
  			 * Get the code for the <object> instantiation which should be emitted into
  			 * the mscorlib aot image by the AOT compiler.
  			 */
  			code = (guint8 *)mono_aot_get_method (domain, m, inner_error);
  			mono_error_cleanup (inner_error);
  			if (code)
  				return code;
  		}
  
  		/* For ARRAY_ACCESSOR wrappers with reference types, use the <object> instantiation saved in corlib */
  		if (method_index == 0xffffff && method->wrapper_type == MONO_WRAPPER_OTHER) {
  			WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  			if (info->subtype == WRAPPER_SUBTYPE_ARRAY_ACCESSOR) {
  				MonoMethod *array_method = info->d.array_accessor.method;
  				if (MONO_TYPE_IS_REFERENCE (m_class_get_byval_arg (m_class_get_element_class (array_method->klass)))) {
  					int rank;
  
  					if (!strcmp (array_method->name, "Set"))
  						rank = mono_method_signature_internal (array_method)->param_count - 1;
  					else if (!strcmp (array_method->name, "Get") || !strcmp (array_method->name, "Address"))
  						rank = mono_method_signature_internal (array_method)->param_count;
  					else
  						g_assert_not_reached ();
  					MonoClass *obj_array_class = mono_class_create_array (mono_defaults.object_class, rank);
  					MonoMethod *m = mono_class_get_method_from_name_checked (obj_array_class, array_method->name, mono_method_signature_internal (array_method)->param_count, 0, error);
  					mono_error_assert_ok (error);
  					g_assert (m);
  
  					m = mono_marshal_get_array_accessor_wrapper (m);
  					if (m != method) {
  						code = (guint8 *)mono_aot_get_method (domain, m, inner_error);
  						mono_error_cleanup (inner_error);
  						if (code)
  							return code;
  					}
  				}
  			}
  		}
  
  		if (method_index == 0xffffff && method->is_inflated && mono_method_is_generic_sharable_full (method, FALSE, TRUE, FALSE)) {
  			/* Partial sharing */
  			MonoMethod *shared;
  
  			shared = mini_get_shared_method_full (method, SHARE_MODE_NONE, error);
  			return_val_if_nok (error, NULL);
  
  			method_index = find_aot_method (shared, &amodule);
  			if (method_index != 0xffffff)
  				method = shared;
  		}
  
  		if (method_index == 0xffffff && method->is_inflated && mono_method_is_generic_sharable_full (method, FALSE, FALSE, TRUE)) {
  			MonoMethod *shared;
  			/* gsharedvt */
  			/* Use the all-vt shared method since this is what was AOTed */
  			shared = mini_get_shared_method_full (method, SHARE_MODE_GSHAREDVT, error);
  			if (!shared)
  				return NULL;
  
  			method_index = find_aot_method (shared, &amodule);
  			if (method_index != 0xffffff) {
  				method = mini_get_shared_method_full (method, SHARE_MODE_GSHAREDVT, error);
  				if (!method)
  					return NULL;
  			}
  		}
  
  		if (method_index == 0xffffff) {
  			if (mono_trace_is_traced (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT)) {
  				char *full_name;
  
  				full_name = mono_method_full_name (method, TRUE);
  				mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT NOT FOUND: %s.", full_name);
  				g_free (full_name);
  			}
  			return NULL;
  		}
  
  		if (method_index == 0xffffff)
  			return NULL;
  
  		/* Needed by find_jit_info */
  		amodule_lock (amodule);
  		g_hash_table_insert (amodule->extra_methods, GUINT_TO_POINTER (method_index), method);
  		amodule_unlock (amodule);
  	} else {
  		/* Common case */
  		method_index = mono_metadata_token_index (method->token) - 1;
  
  		guint32 num_methods = amodule->info.nmethods - amodule->info.nextra_methods;
  		if (method_index >= num_methods)
  			/* method not available in AOT image */
  			return NULL;
  	}
  
  	code = (guint8 *)load_method (domain, amodule, m_class_get_image (klass), method, method->token, method_index, error);
  	if (!is_ok (error))
  		return NULL;
  	if (code && cache_result) {
  		amodule_lock (amodule);
  		g_hash_table_insert (amodule->method_to_code, orig_method, code);
  		amodule_unlock (amodule);
  	}
  	return code;
  }
  
  /**
   * Same as mono_aot_get_method, but we try to avoid loading any metadata from the
   * method.
   */
  gpointer
  mono_aot_get_method_from_token (MonoDomain *domain, MonoImage *image, guint32 token, MonoError *error)
  {
  	MonoAotModule *aot_module = image->aot_module;
  	int method_index;
  	gpointer res;
  
  	error_init (error);
  
  	if (!aot_module)
  		return NULL;
  
  	method_index = mono_metadata_token_index (token) - 1;
  
  	res = load_method (domain, aot_module, image, NULL, token, method_index, error);
  	return res;
  }
  
  typedef struct {
  	guint8 *addr;
  	gboolean res;
  } IsGotEntryUserData;
  
  static void
  check_is_got_entry (gpointer key, gpointer value, gpointer user_data)
  {
  	IsGotEntryUserData *data = (IsGotEntryUserData*)user_data;
  	MonoAotModule *aot_module = (MonoAotModule*)value;
  
  	if (aot_module->got && (data->addr >= (guint8*)(aot_module->got)) && (data->addr < (guint8*)(aot_module->got + aot_module->info.got_size)))
  		data->res = TRUE;
  }
  
  gboolean
  mono_aot_is_got_entry (guint8 *code, guint8 *addr)
  {
  	IsGotEntryUserData user_data;
  
  	if (!aot_modules)
  		return FALSE;
  
  	user_data.addr = addr;
  	user_data.res = FALSE;
  	mono_aot_lock ();
  	g_hash_table_foreach (aot_modules, check_is_got_entry, &user_data);
  	mono_aot_unlock ();
  	
  	return user_data.res;
  }
  
  typedef struct {
  	guint8 *addr;
  	MonoAotModule *module;
  } FindAotModuleUserData;
  
  static void
  find_aot_module_cb (gpointer key, gpointer value, gpointer user_data)
  {
  	FindAotModuleUserData *data = (FindAotModuleUserData*)user_data;
  	MonoAotModule *aot_module = (MonoAotModule*)value;
  
  	if (amodule_contains_code_addr (aot_module, data->addr))
  		data->module = aot_module;
  }
  
  static MonoAotModule*
  find_aot_module (guint8 *code)
  {
  	FindAotModuleUserData user_data;
  
  	if (!aot_modules)
  		return NULL;
  
  	/* Reading these need no locking */
  	if (((gsize)code < aot_code_low_addr) || ((gsize)code > aot_code_high_addr))
  		return NULL;
  
  	user_data.addr = code;
  	user_data.module = NULL;
  		
  	mono_aot_lock ();
  	g_hash_table_foreach (aot_modules, find_aot_module_cb, &user_data);
  	mono_aot_unlock ();
  	
  	return user_data.module;
  }
  
  #ifdef MONO_ARCH_CODE_EXEC_ONLY
  static guint32
  aot_resolve_plt_info_offset (gpointer amodule, guint32 plt_entry_index)
  {
  	MonoAotModule *module = (MonoAotModule*)amodule;
  	return mono_aot_get_offset (module->got_info_offsets, module->info.plt_got_info_offset_base + plt_entry_index);
  }
  #endif
  
  void
  mono_aot_patch_plt_entry (gpointer aot_module, guint8 *code, guint8 *plt_entry, gpointer *got, host_mgreg_t *regs, guint8 *addr)
  {
  	MonoAotModule *amodule = (MonoAotModule *)aot_module;
  
  	/*
  	 * Since AOT code is only used in the root domain, 
  	 * mono_domain_get () != mono_get_root_domain () means the calling method
  	 * is AppDomain:InvokeInDomain, so this is the same check as in 
  	 * mono_method_same_domain () but without loading the metadata for the method.
  	 */
  	if (mono_domain_get () == mono_get_root_domain ()) {
  		if (!amodule) {
  			amodule = find_aot_module (code);
  		}
  #ifdef MONO_ARCH_CODE_EXEC_ONLY
  		mono_arch_patch_plt_entry_exec_only (&amodule->info, plt_entry, amodule->got, regs, addr);
  #else
  		mono_arch_patch_plt_entry (plt_entry, amodule->got, regs, addr);
  #endif
  	}
  }
  
  /*
   * mono_aot_plt_resolve:
   *
   *   This function is called by the entries in the PLT to resolve the actual method that
   * needs to be called. It returns a trampoline to the method and patches the PLT entry.
   * Returns NULL if the something cannot be loaded.
   */
  gpointer
  mono_aot_plt_resolve (gpointer aot_module, host_mgreg_t *regs, guint8 *code, MonoError *error)
  {
  #ifdef MONO_ARCH_AOT_SUPPORTED
  	guint8 *p, *target, *plt_entry;
  	guint32 plt_info_offset;
  	MonoJumpInfo ji;
  	MonoAotModule *module = (MonoAotModule*)aot_module;
  	gboolean res, no_ftnptr = FALSE;
  	MonoMemPool *mp;
  	gboolean using_gsharedvt = FALSE;
  
  	error_init (error);
  
  	plt_entry = mono_aot_get_plt_entry (regs, code);
  	g_assert (plt_entry);
  
  	plt_info_offset = mono_aot_get_plt_info_offset (aot_module, plt_entry, regs, code);
  
  	//printf ("DYN: %p %d\n", aot_module, plt_info_offset);
  
  	p = &module->blob [plt_info_offset];
  
  	ji.type = (MonoJumpInfoType)decode_value (p, &p);
  
  	mp = mono_mempool_new ();
  	res = decode_patch (module, mp, &ji, p, &p);
  
  	if (!res) {
  		mono_mempool_destroy (mp);
  		return NULL;
  	}
  
  #ifdef MONO_ARCH_GSHAREDVT_SUPPORTED
  	using_gsharedvt = TRUE;
  #endif
  
  	/* 
  	 * Avoid calling resolve_patch_target in the full-aot case if possible, since
  	 * it would create a trampoline, and we don't need that.
  	 * We could do this only if the method does not need the special handling
  	 * in mono_magic_trampoline ().
  	 */
  	if (mono_aot_only && ji.type == MONO_PATCH_INFO_METHOD && !ji.data.method->is_generic && !mono_method_check_context_used (ji.data.method) && !(ji.data.method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) &&
  		!mono_method_needs_static_rgctx_invoke (ji.data.method, FALSE) && !using_gsharedvt) {
  		target = (guint8 *)mono_jit_compile_method (ji.data.method, error);
  		if (!is_ok (error)) {
  			mono_mempool_destroy (mp);
  			return NULL;
  		}
  		no_ftnptr = TRUE;
  	} else {
  		target = (guint8 *)mono_resolve_patch_target (NULL, mono_domain_get (), NULL, &ji, TRUE, error);
  		if (!is_ok (error)) {
  			mono_mempool_destroy (mp);
  			return NULL;
  		}
  	}
  
  	/*
  	 * The trampoline expects us to return a function descriptor on platforms which use
  	 * it, but resolve_patch_target returns a direct function pointer for some type of
  	 * patches, so have to translate between the two.
  	 * FIXME: Clean this up, but how ?
  	 */
  	if (ji.type == MONO_PATCH_INFO_ABS
  		|| ji.type == MONO_PATCH_INFO_JIT_ICALL_ID
  		|| ji.type == MONO_PATCH_INFO_ICALL_ADDR
  		|| ji.type == MONO_PATCH_INFO_SPECIFIC_TRAMPOLINE_LAZY_FETCH_ADDR
  		|| ji.type == MONO_PATCH_INFO_JIT_ICALL_ADDR
  		|| ji.type == MONO_PATCH_INFO_RGCTX_FETCH) {
  		/* These should already have a function descriptor */
  #ifdef PPC_USES_FUNCTION_DESCRIPTOR
  		/* Our function descriptors have a 0 environment, gcc created ones don't */
  		if (ji.type != MONO_PATCH_INFO_JIT_ICALL_ID
  				&& ji.type != MONO_PATCH_INFO_JIT_ICALL_ADDR
  				&& ji.type != MONO_PATCH_INFO_ICALL_ADDR
  				&& ji.type != MONO_PATCH_INFO_SPECIFIC_TRAMPOLINE_LAZY_FETCH_ADDR)
  			g_assert (((gpointer*)target) [2] == 0);
  #endif
  		/* Empty */
  	} else if (!no_ftnptr) {
  #ifdef PPC_USES_FUNCTION_DESCRIPTOR
  		g_assert (((gpointer*)target) [2] != 0);
  #endif
  		target = (guint8 *)mono_create_ftnptr (mono_domain_get (), target);
  	}
  
  	mono_mempool_destroy (mp);
  
  	/* Patch the PLT entry with target which might be the actual method not a trampoline */
  	mono_aot_patch_plt_entry (aot_module, code, plt_entry, module->got, regs, target);
  
  	return target;
  #else
  	g_assert_not_reached ();
  	return NULL;
  #endif
  }
  
  /**
   * init_plt:
   *
   *   Initialize the PLT table of the AOT module. Called lazily when the first AOT
   * method in the module is loaded to avoid committing memory by writing to it.
   */
  static void
  init_plt (MonoAotModule *amodule)
  {
  	int i;
  	gpointer tramp;
  
  	if (amodule->plt_inited)
  		return;
  
  	tramp = mono_create_specific_trampoline (amodule, MONO_TRAMPOLINE_AOT_PLT, mono_get_root_domain (), NULL);
  	tramp = mono_create_ftnptr (mono_domain_get (), tramp);
  
  	amodule_lock (amodule);
  
  	if (amodule->plt_inited) {
  		amodule_unlock (amodule);
  		return;
  	}
  
  	if (amodule->info.plt_size <= 1) {
  		amodule->plt_inited = TRUE;
  		amodule_unlock (amodule);
  		return;
  	}
  
  	/*
  	 * Initialize the PLT entries in the GOT to point to the default targets.
  	 */
  	for (i = 1; i < amodule->info.plt_size; ++i)
  		/* All the default entries point to the AOT trampoline */
  		((gpointer*)amodule->got)[amodule->info.plt_got_offset_base + i] = tramp;
  
  	mono_memory_barrier ();
  
  	amodule->plt_inited = TRUE;
  
  	amodule_unlock (amodule);
  }
  
  /*
   * mono_aot_get_plt_entry:
   *
   *   Return the address of the PLT entry called by the code at CODE if exists.
   */
  guint8*
  mono_aot_get_plt_entry (host_mgreg_t *regs, guint8 *code)
  {
  	MonoAotModule *amodule = find_aot_module (code);
  	guint8 *target = NULL;
  
  	if (!amodule)
  		return NULL;
  
  #ifdef TARGET_ARM
  	if (is_thumb_code (amodule, code - 4))
  		return mono_arm_get_thumb_plt_entry (code);
  #endif
  
  #ifdef MONO_ARCH_AOT_SUPPORTED
  #ifdef MONO_ARCH_CODE_EXEC_ONLY
  	target = mono_aot_arch_get_plt_entry_exec_only (&amodule->info, regs, code, amodule->plt);
  #else
  	target = mono_arch_get_call_target (code);
  #endif
  #else
  	g_assert_not_reached ();
  #endif
  
  #ifdef MONOTOUCH
  	while (target != NULL) {
  		if ((target >= (guint8*)(amodule->plt)) && (target < (guint8*)(amodule->plt_end)))
  			return target;
  		
  		// Add 4 since mono_arch_get_call_target assumes we're passing
  		// the instruction after the actual branch instruction.
  		target = mono_arch_get_call_target (target + 4);
  	}
  
  	return NULL;
  #else
  	if ((target >= (guint8*)(amodule->plt)) && (target < (guint8*)(amodule->plt_end)))
  		return target;
  	else
  		return NULL;
  #endif
  }
  
  /*
   * mono_aot_get_plt_info_offset:
   *
   *   Return the PLT info offset belonging to the plt entry called by CODE.
   */
  guint32
  mono_aot_get_plt_info_offset (gpointer aot_module, guint8 *plt_entry, host_mgreg_t *regs, guint8 *code)
  {
  	if (!plt_entry) {
  		plt_entry = mono_aot_get_plt_entry (regs, code);
  		g_assert (plt_entry);
  	}
  
  	/* The offset is embedded inside the code after the plt entry */
  #ifdef MONO_ARCH_AOT_SUPPORTED
  #ifdef MONO_ARCH_CODE_EXEC_ONLY
  	return mono_arch_get_plt_info_offset_exec_only (&((MonoAotModule*)aot_module)->info, plt_entry, regs, code, aot_resolve_plt_info_offset, aot_module);
  #else
  	return mono_arch_get_plt_info_offset (plt_entry, regs, code);
  #endif
  #else
  	g_assert_not_reached ();
  	return 0;
  #endif
  }
  
  static gpointer
  mono_create_ftnptr_malloc (guint8 *code)
  {
  #ifdef PPC_USES_FUNCTION_DESCRIPTOR
  	MonoPPCFunctionDescriptor *ftnptr = g_malloc0 (sizeof (MonoPPCFunctionDescriptor));
  
  	ftnptr->code = code;
  	ftnptr->toc = NULL;
  	ftnptr->env = NULL;
  
  	return ftnptr;
  #else
  	return code;
  #endif
  }
  
  /*
   * load_function_full:
   *
   *   Load the function named NAME from the aot image. 
   */
  static gpointer
  load_function_full (MonoAotModule *amodule, const char *name, MonoTrampInfo **out_tinfo)
  {
  	char *symbol;
  	guint8 *p;
  	int n_patches, pindex;
  	MonoMemPool *mp;
  	gpointer code;
  	guint32 info_offset;
  
  	/* Load the code */
  
  	find_amodule_symbol (amodule, name, &code);
  	g_assertf (code, "Symbol '%s' not found in AOT file '%s'.\n", name, amodule->aot_name);
  
  	mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "AOT: FOUND function '%s' in AOT file '%s'.", name, amodule->aot_name);
  
  	/* Load info */
  
  	symbol = g_strdup_printf ("%s_p", name);
  	find_amodule_symbol (amodule, symbol, (gpointer *)&p);
  	g_free (symbol);
  	if (!p)
  		/* Nothing to patch */
  		return code;
  
  	info_offset = *(guint32*)p;
  	if (out_tinfo) {
  		MonoTrampInfo *tinfo;
  		guint32 code_size, uw_info_len, uw_offset;
  		guint8 *uw_info;
  		/* Construct a MonoTrampInfo from the data in the AOT image */
  
  		p += sizeof (guint32);
  		code_size = *(guint32*)p;
  		p += sizeof (guint32);
  		uw_offset = *(guint32*)p;
  		uw_info = amodule->unwind_info + uw_offset;
  		uw_info_len = decode_value (uw_info, &uw_info);
  
  		tinfo = g_new0 (MonoTrampInfo, 1);
  		tinfo->code = (guint8 *)code;
  		tinfo->code_size = code_size;
  		tinfo->uw_info_len = uw_info_len;
  		if (uw_info_len)
  			tinfo->uw_info = uw_info;
  
  		*out_tinfo = tinfo;
  	}
  
  	p = amodule->blob + info_offset;
  
  	/* Similar to mono_aot_load_method () */
  
  	n_patches = decode_value (p, &p);
  
  	if (n_patches) {
  		MonoJumpInfo *patches;
  		guint32 *got_slots;
  
  		mp = mono_mempool_new ();
  
  		patches = load_patch_info (amodule, mp, n_patches, FALSE, &got_slots, p, &p);
  		g_assert (patches);
  
  		for (pindex = 0; pindex < n_patches; ++pindex) {
  			MonoJumpInfo *ji = &patches [pindex];
  			ERROR_DECL (error);
  			gpointer target;
  
  			if (amodule->got [got_slots [pindex]])
  				continue;
  
  			/*
  			 * When this code is executed, the runtime may not be initalized yet, so
  			 * resolve the patch info by hand.
  			 */
  			if (ji->type == MONO_PATCH_INFO_SPECIFIC_TRAMPOLINE_LAZY_FETCH_ADDR) {
  				target = mono_create_specific_trampoline (GUINT_TO_POINTER (ji->data.uindex), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL);
  				target = mono_create_ftnptr_malloc ((guint8 *)target);
  			} else if (ji->type == MONO_PATCH_INFO_SPECIFIC_TRAMPOLINES) {
  				target = amodule->info.specific_trampolines;
  				g_assert (target);
  			} else if (ji->type == MONO_PATCH_INFO_SPECIFIC_TRAMPOLINES_GOT_SLOTS_BASE) {
  				target = &amodule->got [amodule->info.trampoline_got_offset_base [MONO_AOT_TRAMP_SPECIFIC]];
  			} else if (ji->type == MONO_PATCH_INFO_JIT_ICALL_ADDR) {
  				const MonoJitICallId jit_icall_id = (MonoJitICallId)ji->data.jit_icall_id;
  				switch (jit_icall_id) {
  
  #undef MONO_AOT_ICALL
  #define MONO_AOT_ICALL(x) case MONO_JIT_ICALL_ ## x: target = (gpointer)x; break;
  
  				MONO_AOT_ICALL (mono_get_lmf_addr)
  				MONO_AOT_ICALL (mono_thread_force_interruption_checkpoint_noraise)
  				MONO_AOT_ICALL (mono_exception_from_token)
  
  				case MONO_JIT_ICALL_mono_debugger_agent_single_step_from_context:
  					target = (gpointer)mini_get_dbg_callbacks ()->single_step_from_context;
  					break;
  				case MONO_JIT_ICALL_mono_debugger_agent_breakpoint_from_context:
  					target = (gpointer)mini_get_dbg_callbacks ()->breakpoint_from_context;
  					break;
  				case MONO_JIT_ICALL_mono_throw_exception:
  					target = mono_get_throw_exception_addr ();
  					break;
  				case MONO_JIT_ICALL_mono_rethrow_preserve_exception:
  					target = mono_get_rethrow_preserve_exception_addr ();
  					break;
  
  				case MONO_JIT_ICALL_generic_trampoline_jit:
  				case MONO_JIT_ICALL_generic_trampoline_jump:
  				case MONO_JIT_ICALL_generic_trampoline_rgctx_lazy_fetch:
  				case MONO_JIT_ICALL_generic_trampoline_aot:
  				case MONO_JIT_ICALL_generic_trampoline_aot_plt:
  				case MONO_JIT_ICALL_generic_trampoline_delegate:
  				case MONO_JIT_ICALL_generic_trampoline_generic_virtual_remoting:
  				case MONO_JIT_ICALL_generic_trampoline_vcall:
  					target = (gpointer)mono_get_trampoline_func (mono_jit_icall_id_to_trampoline_type (jit_icall_id));
  					break;
  				default:
  					target = mono_arch_load_function (jit_icall_id);
  					g_assertf (target, "Unknown relocation '%p'\n", ji->data.target);
  				}
  			} else {
  				/* Hopefully the code doesn't have patches which need method or 
  				 * domain to be set.
  				 */
  				target = mono_resolve_patch_target (NULL, NULL, (guint8 *)code, ji, FALSE, error);
  				mono_error_assert_ok (error);
  				g_assert (target);
  			}
  
  			if (ji->type != MONO_PATCH_INFO_NONE)
  				amodule->got [got_slots [pindex]] = target;
  		}
  
  		g_free (got_slots);
  
  		mono_mempool_destroy (mp);
  	}
  
  	return code;
  }
  
  static gpointer
  load_function (MonoAotModule *amodule, const char *name)
  {
  	return load_function_full (amodule, name, NULL);
  }
  
  static MonoAotModule*
  get_mscorlib_aot_module (void)
  {
  	MonoImage *image;
  	MonoAotModule *amodule;
  
  	image = mono_defaults.corlib;
  	if (image && image->aot_module)
  		amodule = image->aot_module;
  	else
  		amodule = mscorlib_aot_module;
  	g_assert (amodule);
  	return amodule;
  }
  
  static void
  mono_no_trampolines (void)
  {
  	g_assert_not_reached ();
  }
  
  /*
   * Return the trampoline identified by NAME from the mscorlib AOT file.
   * On ppc64, this returns a function descriptor.
   */
  gpointer
  mono_aot_get_trampoline_full (const char *name, MonoTrampInfo **out_tinfo)
  {
  	MonoAotModule *amodule = get_mscorlib_aot_module ();
  
  	if (mono_llvm_only) {
  		*out_tinfo = NULL;
  		return (gpointer)mono_no_trampolines;
  	}
  
  	return mono_create_ftnptr_malloc ((guint8 *)load_function_full (amodule, name, out_tinfo));
  }
  
  gpointer
  mono_aot_get_trampoline (const char *name)
  {
  	MonoTrampInfo *out_tinfo;
  	gpointer code;
  
  	code =  mono_aot_get_trampoline_full (name, &out_tinfo);
  	mono_aot_tramp_info_register (out_tinfo, NULL);
  
  	return code;
  }
  
  static gpointer
  read_unwind_info (MonoAotModule *amodule, MonoTrampInfo *info, const char *symbol_name)
  {
  	gpointer symbol_addr;
  	guint32 uw_offset, uw_info_len;
  	guint8 *uw_info;
  
  	find_amodule_symbol (amodule, symbol_name, &symbol_addr);
  
  	if (!symbol_addr)
  		return NULL;
  
  	uw_offset = *(guint32*)symbol_addr;
  	uw_info = amodule->unwind_info + uw_offset;
  	uw_info_len = decode_value (uw_info, &uw_info);
  
  	info->uw_info_len = uw_info_len;
  	if (uw_info_len)
  		info->uw_info = uw_info;
  	else
  		info->uw_info = NULL;
  
  	/* If successful return the address of the following data */
  	return (guint32*)symbol_addr + 1;
  }
  
  #ifdef MONOTOUCH
  #include <mach/mach.h>
  
  static TrampolinePage* trampoline_pages [MONO_AOT_TRAMP_NUM];
  
  static void
  read_page_trampoline_uwinfo (MonoTrampInfo *info, int tramp_type, gboolean is_generic)
  {
  	char symbol_name [128];
  
  	if (tramp_type == MONO_AOT_TRAMP_SPECIFIC)
  		sprintf (symbol_name, "specific_trampolines_page_%s_p", is_generic ? "gen" : "sp");
  	else if (tramp_type == MONO_AOT_TRAMP_STATIC_RGCTX)
  		sprintf (symbol_name, "rgctx_trampolines_page_%s_p", is_generic ? "gen" : "sp");
  	else if (tramp_type == MONO_AOT_TRAMP_IMT)
  		sprintf (symbol_name, "imt_trampolines_page_%s_p", is_generic ? "gen" : "sp");
  	else if (tramp_type == MONO_AOT_TRAMP_GSHAREDVT_ARG)
  		sprintf (symbol_name, "gsharedvt_trampolines_page_%s_p", is_generic ? "gen" : "sp");
  	else if (tramp_type == MONO_AOT_TRAMP_UNBOX_ARBITRARY)
  		sprintf (symbol_name, "unbox_arbitrary_trampolines_page_%s_p", is_generic ? "gen" : "sp");
  	else
  		g_assert_not_reached ();
  
  	read_unwind_info (mscorlib_aot_module, info, symbol_name);
  }
  
  static unsigned char*
  get_new_trampoline_from_page (int tramp_type)
  {
  	TrampolinePage *page;
  	int count;
  	void *tpage;
  	vm_address_t addr, taddr;
  	kern_return_t ret;
  	vm_prot_t prot, max_prot;
  	int psize, specific_trampoline_size;
  	unsigned char *code;
  
  	specific_trampoline_size = 2 * sizeof (gpointer);
  
  	mono_aot_page_lock ();
  	page = trampoline_pages [tramp_type];
  	if (page && page->trampolines < page->trampolines_end) {
  		code = page->trampolines;
  		page->trampolines += specific_trampoline_size;
  		mono_aot_page_unlock ();
  		return code;
  	}
  	mono_aot_page_unlock ();
  
  	psize = MONO_AOT_TRAMP_PAGE_SIZE;
  
  	/* the trampoline template page is in the mscorlib module */
  	MonoAotModule *amodule = mscorlib_aot_module;
  	g_assert (amodule);
  
  	if (tramp_type == MONO_AOT_TRAMP_SPECIFIC)
  		tpage = load_function (amodule, "specific_trampolines_page");
  	else if (tramp_type == MONO_AOT_TRAMP_STATIC_RGCTX)
  		tpage = load_function (amodule, "rgctx_trampolines_page");
  	else if (tramp_type == MONO_AOT_TRAMP_IMT)
  		tpage = load_function (amodule, "imt_trampolines_page");
  	else if (tramp_type == MONO_AOT_TRAMP_GSHAREDVT_ARG)
  		tpage = load_function (amodule, "gsharedvt_arg_trampolines_page");
  	else if (tramp_type == MONO_AOT_TRAMP_UNBOX_ARBITRARY)
  		tpage = load_function (amodule, "unbox_arbitrary_trampolines_page");
  	else
  		g_error ("Incorrect tramp type for trampolines page");
  	g_assert (tpage);
  	/*g_warning ("loaded trampolines page at %x", tpage);*/
  
  	/* avoid the unlikely case of looping forever */
  	count = 40;
  	page = NULL;
  	while (page == NULL && count-- > 0) {
  		MonoTrampInfo *gen_info, *sp_info;
  
  		addr = 0;
  		/* allocate two contiguous pages of memory: the first page will contain the data (like a local constant pool)
  		 * while the second will contain the trampolines.
  		 */
  		do {
  			ret = vm_allocate (mach_task_self (), &addr, psize * 2, VM_FLAGS_ANYWHERE);
  		} while (ret == KERN_ABORTED);
  		if (ret != KERN_SUCCESS) {
  			g_error ("Cannot allocate memory for trampolines: %d", ret);
  			break;
  		}
  		/*g_warning ("allocated trampoline double page at %x", addr);*/
  		/* replace the second page with a remapped trampoline page */
  		taddr = addr + psize;
  		vm_deallocate (mach_task_self (), taddr, psize);
  		ret = vm_remap (mach_task_self (), &taddr, psize, 0, FALSE, mach_task_self(), (vm_address_t)tpage, FALSE, &prot, &max_prot, VM_INHERIT_SHARE);
  		if (ret != KERN_SUCCESS) {
  			/* someone else got the page, try again  */
  			vm_deallocate (mach_task_self (), addr, psize);
  			continue;
  		}
  		/*g_warning ("remapped trampoline page at %x", taddr);*/
  
  		mono_aot_page_lock ();
  		page = trampoline_pages [tramp_type];
  		/* some other thread already allocated, so use that to avoid wasting memory */
  		if (page && page->trampolines < page->trampolines_end) {
  			code = page->trampolines;
  			page->trampolines += specific_trampoline_size;
  			mono_aot_page_unlock ();
  			vm_deallocate (mach_task_self (), addr, psize);
  			vm_deallocate (mach_task_self (), taddr, psize);
  			return code;
  		}
  		page = (TrampolinePage*)addr;
  		page->next = trampoline_pages [tramp_type];
  		trampoline_pages [tramp_type] = page;
  		page->trampolines = (guint8*)(taddr + amodule->info.tramp_page_code_offsets [tramp_type]);
  		page->trampolines_end = (guint8*)(taddr + psize - 64);
  		code = page->trampolines;
  		page->trampolines += specific_trampoline_size;
  		mono_aot_page_unlock ();
  
  		/* Register the generic part at the beggining of the trampoline page */
  		gen_info = mono_tramp_info_create (NULL, (guint8*)taddr, amodule->info.tramp_page_code_offsets [tramp_type], NULL, NULL);
  		read_page_trampoline_uwinfo (gen_info, tramp_type, TRUE);
  		mono_aot_tramp_info_register (gen_info, NULL);
  		/*
  		 * FIXME
  		 * Registering each specific trampoline produces a lot of
  		 * MonoJitInfo structures. Jump trampolines are also registered
  		 * separately.
  		 */
  		if (tramp_type != MONO_AOT_TRAMP_SPECIFIC) {
  			/* Register the rest of the page as a single trampoline */
  			sp_info = mono_tramp_info_create (NULL, code, page->trampolines_end - code, NULL, NULL);
  			read_page_trampoline_uwinfo (sp_info, tramp_type, FALSE);
  			mono_aot_tramp_info_register (sp_info, NULL);
  		}
  		return code;
  	}
  	g_error ("Cannot allocate more trampoline pages: %d", ret);
  	return NULL;
  }
  
  #else
  static unsigned char*
  get_new_trampoline_from_page (int tramp_type)
  {
  	g_error ("Page trampolines not supported.");
  	return NULL;
  }
  #endif
  
  
  static gpointer
  get_new_specific_trampoline_from_page (gpointer tramp, gpointer arg)
  {
  	void *code;
  	gpointer *data;
  
  	code = get_new_trampoline_from_page (MONO_AOT_TRAMP_SPECIFIC);
  
  	data = (gpointer*)((char*)code - MONO_AOT_TRAMP_PAGE_SIZE);
  	data [0] = arg;
  	data [1] = tramp;
  	/*g_warning ("new trampoline at %p for data %p, tramp %p (stored at %p)", code, arg, tramp, data);*/
  	return code;
  
  }
  
  static gpointer
  get_new_rgctx_trampoline_from_page (gpointer tramp, gpointer arg)
  {
  	void *code;
  	gpointer *data;
  
  	code = get_new_trampoline_from_page (MONO_AOT_TRAMP_STATIC_RGCTX);
  
  	data = (gpointer*)((char*)code - MONO_AOT_TRAMP_PAGE_SIZE);
  	data [0] = arg;
  	data [1] = tramp;
  	/*g_warning ("new rgctx trampoline at %p for data %p, tramp %p (stored at %p)", code, arg, tramp, data);*/
  	return code;
  
  }
  
  static gpointer
  get_new_imt_trampoline_from_page (gpointer arg)
  {
  	void *code;
  	gpointer *data;
  
  	code = get_new_trampoline_from_page (MONO_AOT_TRAMP_IMT);
  
  	data = (gpointer*)((char*)code - MONO_AOT_TRAMP_PAGE_SIZE);
  	data [0] = arg;
  	/*g_warning ("new imt trampoline at %p for data %p, (stored at %p)", code, arg, data);*/
  	return code;
  
  }
  
  static gpointer
  get_new_gsharedvt_arg_trampoline_from_page (gpointer tramp, gpointer arg)
  {
  	void *code;
  	gpointer *data;
  
  	code = get_new_trampoline_from_page (MONO_AOT_TRAMP_GSHAREDVT_ARG);
  
  	data = (gpointer*)((char*)code - MONO_AOT_TRAMP_PAGE_SIZE);
  	data [0] = arg;
  	data [1] = tramp;
  	/*g_warning ("new rgctx trampoline at %p for data %p, tramp %p (stored at %p)", code, arg, tramp, data);*/
  	return code;
  }
  
  static gpointer
  get_new_unbox_arbitrary_trampoline_frome_page (gpointer addr)
  {
  	void *code;
  	gpointer *data;
  
  	code = get_new_trampoline_from_page (MONO_AOT_TRAMP_UNBOX_ARBITRARY);
  
  	data = (gpointer*)((char*)code - MONO_AOT_TRAMP_PAGE_SIZE);
  	data [0] = addr;
  
  	return code;
  }
  
  /* Return a given kind of trampoline */
  /* FIXME set unwind info for these trampolines */
  static gpointer
  get_numerous_trampoline (MonoAotTrampoline tramp_type, int n_got_slots, MonoAotModule **out_amodule, guint32 *got_offset, guint32 *out_tramp_size)
  {
  	MonoImage *image;
  	MonoAotModule *amodule = get_mscorlib_aot_module ();
  	int index, tramp_size;
  
  	/* Currently, we keep all trampolines in the mscorlib AOT image */
  	image = mono_defaults.corlib;
  
  	*out_amodule = amodule;
  
  	mono_aot_lock ();
  
  #ifdef MONOTOUCH
  #define	MONOTOUCH_TRAMPOLINES_ERROR ". See http://docs.xamarin.com/ios/troubleshooting for instructions on how to fix this condition."
  #else
  #define	MONOTOUCH_TRAMPOLINES_ERROR ""
  #endif
  	if (amodule->trampoline_index [tramp_type] == amodule->info.num_trampolines [tramp_type]) {
  		g_error ("Ran out of trampolines of type %d in '%s' (limit %d)%s\n", 
  				 tramp_type, image ? image->name : MONO_ASSEMBLY_CORLIB_NAME, amodule->info.num_trampolines [tramp_type], MONOTOUCH_TRAMPOLINES_ERROR);
  	}
  	index = amodule->trampoline_index [tramp_type] ++;
  
  	mono_aot_unlock ();
  
  	*got_offset = amodule->info.trampoline_got_offset_base [tramp_type] + (index * n_got_slots);
  
  	tramp_size = amodule->info.trampoline_size [tramp_type];
  
  	if (out_tramp_size)
  		*out_tramp_size = tramp_size;
  
  	return amodule->trampolines [tramp_type] + (index * tramp_size);
  }
  
  static void
  no_specific_trampoline (void)
  {
  	g_assert_not_reached ();
  }
  
  /*
   * Return a specific trampoline from the AOT file.
   */
  gpointer
  mono_aot_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
  {
  	MonoAotModule *amodule;
  	guint32 got_offset, tramp_size;
  	guint8 *code, *tramp;
  	static gpointer generic_trampolines [MONO_TRAMPOLINE_NUM];
  	static gboolean inited;
  	static guint32 num_trampolines;
  
  	if (mono_llvm_only) {
  		*code_len = 1;
  		return (gpointer)no_specific_trampoline;
  	}
  
  	if (!inited) {
  		mono_aot_lock ();
  
  		if (!inited) {
  			mono_counters_register ("Specific trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &num_trampolines);
  			inited = TRUE;
  		}
  
  		mono_aot_unlock ();
  	}
  
  	num_trampolines ++;
  
  	if (!generic_trampolines [tramp_type]) {
  		const char *symbol;
  
  		symbol = mono_get_generic_trampoline_name (tramp_type);
  		generic_trampolines [tramp_type] = mono_aot_get_trampoline (symbol);
  	}
  
  	tramp = (guint8 *)generic_trampolines [tramp_type];
  	g_assert (tramp);
  
  	if (USE_PAGE_TRAMPOLINES) {
  		code = (guint8 *)get_new_specific_trampoline_from_page (tramp, arg1);
  		tramp_size = 8;
  	} else {
  		code = (guint8 *)get_numerous_trampoline (MONO_AOT_TRAMP_SPECIFIC, 2, &amodule, &got_offset, &tramp_size);
  
  		amodule->got [got_offset] = tramp;
  		amodule->got [got_offset + 1] = arg1;
  	}
  
  	if (code_len)
  		*code_len = tramp_size;
  
  	return code;
  }
  
  gpointer
  mono_aot_get_static_rgctx_trampoline (gpointer ctx, gpointer addr)
  {
  	MonoAotModule *amodule;
  	guint8 *code;
  	guint32 got_offset;
  
  	if (USE_PAGE_TRAMPOLINES) {
  		code = (guint8 *)get_new_rgctx_trampoline_from_page (addr, ctx);
  	} else {
  		code = (guint8 *)get_numerous_trampoline (MONO_AOT_TRAMP_STATIC_RGCTX, 2, &amodule, &got_offset, NULL);
  
  		amodule->got [got_offset] = ctx;
  		amodule->got [got_offset + 1] = addr; 
  	}
  
  	/* The caller expects an ftnptr */
  	return mono_create_ftnptr (mono_domain_get (), code);
  }
  
  gpointer
  mono_aot_get_unbox_arbitrary_trampoline (gpointer addr)
  {
  	MonoAotModule *amodule;
  	guint8 *code;
  	guint32 got_offset;
  
  	if (USE_PAGE_TRAMPOLINES) {
  		code = (guint8 *)get_new_unbox_arbitrary_trampoline_frome_page (addr);
  	} else {
  		code = (guint8 *)get_numerous_trampoline (MONO_AOT_TRAMP_UNBOX_ARBITRARY, 1, &amodule, &got_offset, NULL);
  		amodule->got [got_offset] = addr;
  	}
  
  	/* The caller expects an ftnptr */
  	return mono_create_ftnptr (mono_domain_get (), code);
  }
  
  static int
  i32_idx_comparer (const void *key, const void *member)
  {
  	gint32 idx1 = GPOINTER_TO_INT (key);
  	gint32 idx2 = *(gint32*)member;
  	return idx1 - idx2;
  }
  
  static int
  i16_idx_comparer (const void *key, const void *member)
  {
  	int idx1 = GPOINTER_TO_INT (key);
  	int idx2 = *(gint16*)member;
  	return idx1 - idx2;
  }
  
  static gboolean
  aot_is_slim_amodule (MonoAotModule *amodule)
  {
  	if (!amodule)
  		return FALSE;
  
  	/* "slim" only applies to mscorlib.dll */
  	if (strcmp (amodule->aot_name, "mscorlib"))
  		return FALSE;
  
  	guint32 f = amodule->info.flags;
  	return (f & MONO_AOT_FILE_FLAG_INTERP) && !(f & MONO_AOT_FILE_FLAG_FULL_AOT);
  }
  
  gpointer
  mono_aot_get_unbox_trampoline (MonoMethod *method, gpointer addr)
  {
  	ERROR_DECL (error);
  	guint32 method_index = mono_metadata_token_index (method->token) - 1;
  	MonoAotModule *amodule;
  	gpointer code;
  	guint32 *ut, *ut_end, *entry;
  	int low, high, entry_index = 0;
  	MonoTrampInfo *tinfo;
  
  	if (method->is_inflated && !mono_method_is_generic_sharable_full (method, FALSE, FALSE, FALSE)) {
  		method_index = find_aot_method (method, &amodule);
  		if (method_index == 0xffffff && mono_method_is_generic_sharable_full (method, FALSE, TRUE, FALSE)) {
  			MonoMethod *shared = mini_get_shared_method_full (method, SHARE_MODE_NONE, error);
  			mono_error_assert_ok (error);
  			method_index = find_aot_method (shared, &amodule);
  		}
  		if (method_index == 0xffffff && mono_method_is_generic_sharable_full (method, FALSE, TRUE, TRUE)) {
  			MonoMethod *shared = mini_get_shared_method_full (method, SHARE_MODE_GSHAREDVT, error);
  			mono_error_assert_ok (error);
  
  			method_index = find_aot_method (shared, &amodule);
  		}
  	} else
  		amodule = m_class_get_image (method->klass)->aot_module;
  
  	if (amodule == NULL || method_index == 0xffffff || aot_is_slim_amodule (amodule)) {
  		/* couldn't find unbox trampoline specifically generated for that
  		 * method. this should only happen when an unbox trampoline is needed
  		 * for `fullAOT code -> native-to-interp -> interp` transition if
  		 *   (1) it's a virtual call
  		 *   (2) the receiver is a value type, thus needs unboxing */
  		g_assert (mono_use_interpreter);
  		return mono_aot_get_unbox_arbitrary_trampoline (addr);
  	}
  
  	if (amodule->info.llvm_unbox_tramp_indexes) {
  		int unbox_tramp_idx;
  
  		/* Search the llvm_unbox_tramp_indexes table using a binary search */
  		if (amodule->info.llvm_unbox_tramp_elemsize == sizeof (guint32)) {
  			void *ptr = mono_binary_search (GINT_TO_POINTER (method_index), amodule->info.llvm_unbox_tramp_indexes, amodule->info.llvm_unbox_tramp_num, amodule->info.llvm_unbox_tramp_elemsize, i32_idx_comparer);
  			g_assert (ptr);
  			g_assert (*(int*)ptr == method_index);
  			unbox_tramp_idx = (guint32*)ptr - (guint32*)amodule->info.llvm_unbox_tramp_indexes;
  		} else {
  			void *ptr = mono_binary_search (GINT_TO_POINTER (method_index), amodule->info.llvm_unbox_tramp_indexes, amodule->info.llvm_unbox_tramp_num, amodule->info.llvm_unbox_tramp_elemsize, i16_idx_comparer);
  			g_assert (ptr);
  			g_assert (*(gint16*)ptr == method_index);
  			unbox_tramp_idx = (guint16*)ptr - (guint16*)amodule->info.llvm_unbox_tramp_indexes;
  		}
  		g_assert (unbox_tramp_idx < amodule->info.llvm_unbox_tramp_num);
  		code = ((gpointer*)(amodule->info.llvm_unbox_trampolines))[unbox_tramp_idx];
  		g_assert (code);
  		return code;
  	}
  
  	if (amodule->info.llvm_get_unbox_tramp) {
  		gpointer (*get_tramp) (int) = (gpointer (*)(int))amodule->info.llvm_get_unbox_tramp;
  		code = get_tramp (method_index);
  
  		if (code)
  			return code;
  	}
  
  	ut = amodule->unbox_trampolines;
  	ut_end = amodule->unbox_trampolines_end;
  
  	/* Do a binary search in the sorted table */
  	code = NULL;
  	low = 0;
  	high = (ut_end - ut);
  	while (low < high) {
  		entry_index = (low + high) / 2;
  		entry = &ut [entry_index];
  		if (entry [0] < method_index) {
  			low = entry_index + 1;
  		} else if (entry [0] > method_index) {
  			high = entry_index;
  		} else {
  			break;
  		}
  	}
  
  	if (amodule->info.flags & MONO_AOT_FILE_FLAG_CODE_EXEC_ONLY)
  		code = ((gpointer*)amodule->unbox_trampoline_addresses) [entry_index];
  	else
  		code = get_call_table_entry (amodule->unbox_trampoline_addresses, entry_index, amodule->info.call_table_entry_size);
  
  	g_assert (code);
  
  	tinfo = mono_tramp_info_create (NULL, (guint8 *)code, 0, NULL, NULL);
  
  	gpointer const symbol_addr = read_unwind_info (amodule, tinfo, "unbox_trampoline_p");
  	if (!symbol_addr) {
  		mono_tramp_info_free (tinfo);
  		return FALSE;
  	}
  
  	tinfo->code_size = *(guint32*)symbol_addr;
  	mono_aot_tramp_info_register (tinfo, NULL);
  
  	/* The caller expects an ftnptr */
  	return mono_create_ftnptr (mono_domain_get (), code);
  }
  
  gpointer
  mono_aot_get_lazy_fetch_trampoline (guint32 slot)
  {
  	char *symbol;
  	gpointer code;
  	MonoAotModule *amodule = mscorlib_aot_module;
  	guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
  	static int count = 0;
  
  	count ++;
  	if (index >= amodule->info.num_rgctx_fetch_trampolines) {
  		static gpointer addr;
  		gpointer *info;
  
  		/*
  		 * Use the general version of the rgctx fetch trampoline. It receives a pair of <slot, trampoline> in the rgctx arg reg.
  		 */
  		if (!addr)
  			addr = load_function (amodule, "rgctx_fetch_trampoline_general");
  		info = (void **)mono_domain_alloc0 (mono_get_root_domain (), sizeof (gpointer) * 2);
  		info [0] = GUINT_TO_POINTER (slot);
  		info [1] = mono_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL);
  		code = mono_aot_get_static_rgctx_trampoline (info, addr);
  		return mono_create_ftnptr (mono_domain_get (), code);
  	}
  
  	symbol = mono_get_rgctx_fetch_trampoline_name (slot);
  	code = load_function (amodule, symbol);
  	g_free (symbol);
  	/* The caller expects an ftnptr */
  	return mono_create_ftnptr (mono_domain_get (), code);
  }
  
  static void
  no_imt_trampoline (void)
  {
  	g_assert_not_reached ();
  }
  
  gpointer
  mono_aot_get_imt_trampoline (MonoVTable *vtable, MonoDomain *domain, MonoIMTCheckItem **imt_entries, int count, gpointer fail_tramp)
  {
  	guint32 got_offset;
  	gpointer code;
  	gpointer *buf;
  	int i, index, real_count;
  	MonoAotModule *amodule;
  
  	if (mono_llvm_only)
  		return (gpointer)no_imt_trampoline;
  
  	real_count = 0;
  	for (i = 0; i < count; ++i) {
  		MonoIMTCheckItem *item = imt_entries [i];
  
  		if (item->is_equals)
  			real_count ++;
  	}
  
  	/* Save the entries into an array */
  	buf = (void **)mono_domain_alloc (domain, (real_count + 1) * 2 * sizeof (gpointer));
  	index = 0;
  	for (i = 0; i < count; ++i) {
  		MonoIMTCheckItem *item = imt_entries [i];		
  
  		if (!item->is_equals)
  			continue;
  
  		g_assert (item->key);
  
  		buf [(index * 2)] = item->key;
  		if (item->has_target_code) {
  			gpointer *p = (gpointer *)mono_domain_alloc (domain, sizeof (gpointer));
  			*p = item->value.target_code;
  			buf [(index * 2) + 1] = p;
  		} else {
  			buf [(index * 2) + 1] = &(vtable->vtable [item->value.vtable_slot]);
  		}
  		index ++;
  	}
  	buf [(index * 2)] = NULL;
  	buf [(index * 2) + 1] = fail_tramp;
  	
  	if (USE_PAGE_TRAMPOLINES) {
  		code = get_new_imt_trampoline_from_page (buf);
  	} else {
  		code = get_numerous_trampoline (MONO_AOT_TRAMP_IMT, 1, &amodule, &got_offset, NULL);
  
  		amodule->got [got_offset] = buf;
  	}
  
  	return code;
  }
  
  gpointer
  mono_aot_get_gsharedvt_arg_trampoline (gpointer arg, gpointer addr)
  {
  	MonoAotModule *amodule;
  	guint8 *code;
  	guint32 got_offset;
  
  	if (USE_PAGE_TRAMPOLINES) {
  		code = (guint8 *)get_new_gsharedvt_arg_trampoline_from_page (addr, arg);
  	} else {
  		code = (guint8 *)get_numerous_trampoline (MONO_AOT_TRAMP_GSHAREDVT_ARG, 2, &amodule, &got_offset, NULL);
  
  		amodule->got [got_offset] = arg;
  		amodule->got [got_offset + 1] = addr; 
  	}
  
  	/* The caller expects an ftnptr */
  	return mono_create_ftnptr (mono_domain_get (), code);
  }
  
  #ifdef MONO_ARCH_HAVE_FTNPTR_ARG_TRAMPOLINE
  gpointer
  mono_aot_get_ftnptr_arg_trampoline (gpointer arg, gpointer addr)
  {
  	MonoAotModule *amodule;
  	guint8 *code;
  	guint32 got_offset;
  
  	if (USE_PAGE_TRAMPOLINES) {
  		g_error ("FIXME: ftnptr_arg page trampolines");
  	} else {
  		code = (guint8 *)get_numerous_trampoline (MONO_AOT_TRAMP_FTNPTR_ARG, 2, &amodule, &got_offset, NULL);
  
  		amodule->got [got_offset] = arg;
  		amodule->got [got_offset + 1] = addr;
  	}
  
  	/* The caller expects an ftnptr */
  	return mono_create_ftnptr (mono_domain_get (), code);
  }
  #endif
  
  
  /*
   * mono_aot_set_make_unreadable:
   *
   *   Set whenever to make all mmaped memory unreadable. In conjuction with a
   * SIGSEGV handler, this is useful to find out which pages the runtime tries to read.
   */
  void
  mono_aot_set_make_unreadable (gboolean unreadable)
  {
  	static int inited;
  
  	make_unreadable = unreadable;
  
  	if (make_unreadable && !inited) {
  		mono_counters_register ("AOT: pagefaults", MONO_COUNTER_JIT | MONO_COUNTER_INT, &n_pagefaults);
  	}		
  }
  
  typedef struct {
  	MonoAotModule *module;
  	guint8 *ptr;
  } FindMapUserData;
  
  static void
  find_map (gpointer key, gpointer value, gpointer user_data)
  {
  	MonoAotModule *module = (MonoAotModule*)value;
  	FindMapUserData *data = (FindMapUserData*)user_data;
  
  	if (!data->module)
  		if ((data->ptr >= module->mem_begin) && (data->ptr < module->mem_end))
  			data->module = module;
  }
  
  static MonoAotModule*
  find_module_for_addr (void *ptr)
  {
  	FindMapUserData data;
  
  	if (!make_unreadable)
  		return NULL;
  
  	data.module = NULL;
  	data.ptr = (guint8*)ptr;
  
  	mono_aot_lock ();
  	g_hash_table_foreach (aot_modules, (GHFunc)find_map, &data);
  	mono_aot_unlock ();
  
  	return data.module;
  }
  
  /*
   * mono_aot_is_pagefault:
   *
   *   Should be called from a SIGSEGV signal handler to find out whenever @ptr is
   * within memory allocated by this module.
   */
  gboolean
  mono_aot_is_pagefault (void *ptr)
  {
  	if (!make_unreadable)
  		return FALSE;
  
  	/* 
  	 * Not signal safe, but SIGSEGV's are synchronous, and
  	 * this is only turned on by a MONO_DEBUG option.
  	 */
  	return find_module_for_addr (ptr) != NULL;
  }
  
  /*
   * mono_aot_handle_pagefault:
   *
   *   Handle a pagefault caused by an unreadable page by making it readable again.
   */
  void
  mono_aot_handle_pagefault (void *ptr)
  {
  #ifndef HOST_WIN32
  	guint8* start = (guint8*)ROUND_DOWN (((gssize)ptr), mono_pagesize ());
  	int res;
  
  	mono_aot_lock ();
  	res = mono_mprotect (start, mono_pagesize (), MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_EXEC);
  	g_assert (res == 0);
  
  	n_pagefaults ++;
  	mono_aot_unlock ();
  #endif
  }
  
  MonoAotMethodFlags
  mono_aot_get_method_flags (guint8 *code)
  {
  	guint32 flags;
  
  	if (!code_to_method_flags)
  		return MONO_AOT_METHOD_FLAG_NONE;
  	mono_aot_lock ();
  	/* Not found and no FLAG_NONE are the same, but its not a problem */
  	flags = GPOINTER_TO_UINT (g_hash_table_lookup (code_to_method_flags, code));
  	mono_aot_unlock ();
  	return (MonoAotMethodFlags)flags;
  }
  
  #else
  /* AOT disabled */
  
  void
  mono_aot_init (void)
  {
  }
  
  void
  mono_aot_cleanup (void)
  {
  }
  
  guint32
  mono_aot_find_method_index (MonoMethod *method)
  {
  	g_assert_not_reached ();
  	return 0;
  }
  
  void
  mono_aot_init_llvm_method (gpointer aot_module, guint32 method_index)
  {
  }
  
  gpointer
  mono_aot_get_method (MonoDomain *domain,
  					 MonoMethod *method, MonoError *error)
  {
  	error_init (error);
  	return NULL;
  }
  
  gboolean
  mono_aot_is_got_entry (guint8 *code, guint8 *addr)
  {
  	return FALSE;
  }
  
  gboolean
  mono_aot_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res)
  {
  	return FALSE;
  }
  
  gboolean
  mono_aot_get_class_from_name (MonoImage *image, const char *name_space, const char *name, MonoClass **klass)
  {
  	return FALSE;
  }
  
  MonoJitInfo *
  mono_aot_find_jit_info (MonoDomain *domain, MonoImage *image, gpointer addr)
  {
  	return NULL;
  }
  
  gpointer
  mono_aot_get_method_from_token (MonoDomain *domain, MonoImage *image, guint32 token, MonoError *error)
  {
  	error_init (error);
  	return NULL;
  }
  
  guint8*
  mono_aot_get_plt_entry (guint8 *code)
  {
  	return NULL;
  }
  
  gpointer
  mono_aot_plt_resolve (gpointer aot_module, host_mgreg_t *regs, guint8 *code, MonoError *error)
  {
  	return NULL;
  }
  
  void
  mono_aot_patch_plt_entry (gpointer aot_module, guint8 *code, guint8 *plt_entry, gpointer *got, host_mgreg_t *regs, guint8 *addr)
  {
  }
  
  gpointer
  mono_aot_get_method_from_vt_slot (MonoDomain *domain, MonoVTable *vtable, int slot, MonoError *error)
  {
  	error_init (error);
  
  	return NULL;
  }
  
  guint32
  mono_aot_get_plt_info_offset (host_mgreg_t *regs, guint8 *code)
  {
  	g_assert_not_reached ();
  
  	return 0;
  }
  
  gpointer
  mono_aot_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
  {
  	g_assert_not_reached ();
  	return NULL;
  }
  
  gpointer
  mono_aot_get_static_rgctx_trampoline (gpointer ctx, gpointer addr)
  {
  	g_assert_not_reached ();
  	return NULL;
  }
  
  gpointer
  mono_aot_get_trampoline_full (const char *name, MonoTrampInfo **out_tinfo)
  {
  	g_assert_not_reached ();
  	return NULL;
  }
  
  gpointer
  mono_aot_get_trampoline (const char *name)
  {
  	g_assert_not_reached ();
  	return NULL;
  }
  
  gpointer
  mono_aot_get_unbox_arbitrary_trampoline (gpointer addr)
  {
  	g_assert_not_reached ();
  	return NULL;
  }
  
  gpointer
  mono_aot_get_unbox_trampoline (MonoMethod *method, gpointer addr)
  {
  	g_assert_not_reached ();
  	return NULL;
  }
  
  gpointer
  mono_aot_get_lazy_fetch_trampoline (guint32 slot)
  {
  	g_assert_not_reached ();
  	return NULL;
  }
  
  gpointer
  mono_aot_get_imt_trampoline (MonoVTable *vtable, MonoDomain *domain, MonoIMTCheckItem **imt_entries, int count, gpointer fail_tramp)
  {
  	g_assert_not_reached ();
  	return NULL;
  }	
  
  gpointer
  mono_aot_get_gsharedvt_arg_trampoline (gpointer arg, gpointer addr)
  {
  	g_assert_not_reached ();
  	return NULL;
  }
  
  #ifdef MONO_ARCH_HAVE_FTNPTR_ARG_TRAMPOLINE
  gpointer
  mono_aot_get_ftnptr_arg_trampoline (gpointer arg, gpointer addr)
  {
  	g_assert_not_reached ();
  	return NULL;
  }
  #endif
  
  void
  mono_aot_set_make_unreadable (gboolean unreadable)
  {
  }
  
  gboolean
  mono_aot_is_pagefault (void *ptr)
  {
  	return FALSE;
  }
  
  void
  mono_aot_handle_pagefault (void *ptr)
  {
  }
  
  guint8*
  mono_aot_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
  {
  	g_assert_not_reached ();
  	return NULL;
  }
  
  GHashTable *
  mono_aot_get_weak_field_indexes (MonoImage *image)
  {
  	return NULL;
  }
  
  MonoAotMethodFlags
  mono_aot_get_method_flags (guint8 *code)
  {
  	return MONO_AOT_METHOD_FLAG_NONE;
  }
  
  gboolean
  mono_aot_init_llvmonly_method (gpointer aot_module, guint32 method_index, MonoClass *init_class, MonoError *error)
  {
  	g_assert_not_reached ();
  	return FALSE;
  }
  
  #endif
  