text: /*
     +----------------------------------------------------------------------+
     | PHP Version 7                                                        |
     +----------------------------------------------------------------------+
     | Copyright (c) The PHP Group                                          |
     +----------------------------------------------------------------------+
     | This source file is subject to version 3.01 of the PHP license,      |
     | that is bundled with this package in the file LICENSE, and is        |
     | available through the world-wide-web at the following url:           |
     | http://www.php.net/license/3_01.txt                                  |
     | If you did not receive a copy of the PHP license and are unable to   |
     | obtain it through the world-wide-web, please send a note to          |
     | license@php.net so we can mail you a copy immediately.               |
     +----------------------------------------------------------------------+
     | Authors: Felipe Pena <felipe@php.net>                                |
     | Authors: Joe Watkins <joe.watkins@live.co.uk>                        |
     | Authors: Bob Weinand <bwoebi@php.net>                                |
     +----------------------------------------------------------------------+
  */
  
  #include <stdio.h>
  #include <string.h>
  #include <sys/stat.h>
  #ifndef _WIN32
  #	include <sys/mman.h>
  #	include <unistd.h>
  #endif
  #include <fcntl.h>
  #include "phpdbg.h"
  #include "phpdbg_list.h"
  #include "phpdbg_utils.h"
  #include "phpdbg_prompt.h"
  #include "php_streams.h"
  #include "zend_exceptions.h"
  
  ZEND_EXTERN_MODULE_GLOBALS(phpdbg)
  
  #define PHPDBG_LIST_COMMAND_D(f, h, a, m, l, s, flags) \
  	PHPDBG_COMMAND_D_EXP(f, h, a, m, l, s, &phpdbg_prompt_commands[12], flags)
  
  const phpdbg_command_t phpdbg_list_commands[] = {
  	PHPDBG_LIST_COMMAND_D(lines,     "lists the specified lines",    'l', list_lines,  NULL, "l", PHPDBG_ASYNC_SAFE),
  	PHPDBG_LIST_COMMAND_D(class,     "lists the specified class",    'c', list_class,  NULL, "s", PHPDBG_ASYNC_SAFE),
  	PHPDBG_LIST_COMMAND_D(method,    "lists the specified method",   'm', list_method, NULL, "m", PHPDBG_ASYNC_SAFE),
  	PHPDBG_LIST_COMMAND_D(func,      "lists the specified function", 'f', list_func,   NULL, "s", PHPDBG_ASYNC_SAFE),
  	PHPDBG_END_COMMAND
  };
  
  PHPDBG_LIST(lines) /* {{{ */
  {
  	if (!PHPDBG_G(exec) && !zend_is_executing()) {
  		phpdbg_error("inactive", "type=\"execution\"", "Not executing, and execution context not set");
  		return SUCCESS;
  	}
  
  	switch (param->type) {
  		case NUMERIC_PARAM: {
  			const char *char_file = phpdbg_current_file();
  			zend_string *file = zend_string_init(char_file, strlen(char_file), 0);
  			phpdbg_list_file(file, param->num < 0 ? 1 - param->num : param->num, (param->num < 0 ? param->num : 0) + zend_get_executed_lineno(), 0);
  			efree(file);
  		} break;
  
  		case FILE_PARAM: {
  			zend_string *file;
  			char resolved_path_buf[MAXPATHLEN];
  			const char *abspath = param->file.name;
  			if (VCWD_REALPATH(abspath, resolved_path_buf)) {
  				abspath = resolved_path_buf;
  			}
  			file = zend_string_init(abspath, strlen(abspath), 0);
  			phpdbg_list_file(file, param->file.line, 0, 0);
  			zend_string_release(file);
  		} break;
  
  		phpdbg_default_switch_case();
  	}
  
  	return SUCCESS;
  } /* }}} */
  
  PHPDBG_LIST(func) /* {{{ */
  {
  	phpdbg_list_function_byname(param->str, param->len);
  
  	return SUCCESS;
  } /* }}} */
  
  PHPDBG_LIST(method) /* {{{ */
  {
  	zend_class_entry *ce;
  
  	if (phpdbg_safe_class_lookup(param->method.class, strlen(param->method.class), &ce) == SUCCESS) {
  		zend_function *function;
  		char *lcname = zend_str_tolower_dup(param->method.name, strlen(param->method.name));
  
  		if ((function = zend_hash_str_find_ptr(&ce->function_table, lcname, strlen(lcname)))) {
  			phpdbg_list_function(function);
  		} else {
  			phpdbg_error("list", "type=\"notfound\" method=\"%s::%s\"", "Could not find %s::%s", param->method.class, param->method.name);
  		}
  
  		efree(lcname);
  	} else {
  		phpdbg_error("list", "type=\"notfound\" class=\"%s\"", "Could not find the class %s", param->method.class);
  	}
  
  	return SUCCESS;
  } /* }}} */
  
  PHPDBG_LIST(class) /* {{{ */
  {
  	zend_class_entry *ce;
  
  	if (phpdbg_safe_class_lookup(param->str, param->len, &ce) == SUCCESS) {
  		if (ce->type == ZEND_USER_CLASS) {
  			if (ce->info.user.filename) {
  				phpdbg_list_file(ce->info.user.filename, ce->info.user.line_end - ce->info.user.line_start + 1, ce->info.user.line_start, 0);
  			} else {
  				phpdbg_error("list", "type=\"nosource\" class=\"%s\"", "The source of the requested class (%s) cannot be found", ZSTR_VAL(ce->name));
  			}
  		} else {
  			phpdbg_error("list", "type=\"internalclass\" class=\"%s\"", "The class requested (%s) is not user defined", ZSTR_VAL(ce->name));
  		}
  	} else {
  		phpdbg_error("list", "type=\"notfound\" class=\"%s\"", "The requested class (%s) could not be found", param->str);
  	}
  
  	return SUCCESS;
  } /* }}} */
  
  void phpdbg_list_file(zend_string *filename, uint32_t count, int offset, uint32_t highlight) /* {{{ */
  {
  	uint32_t line, lastline;
  	phpdbg_file_source *data;
  
  	if (!(data = zend_hash_find_ptr(&PHPDBG_G(file_sources), filename))) {
  		phpdbg_error("list", "type=\"unknownfile\"", "Could not find information about included file...");
  		return;
  	}
  
  	if (offset < 0) {
  		count += offset;
  		offset = 0;
  	}
  
  	lastline = offset + count;
  
  	if (lastline > data->lines) {
  		lastline = data->lines;
  	}
  
  	phpdbg_xml("<list %r file=\"%s\">", ZSTR_VAL(filename));
  
  	for (line = offset; line < lastline;) {
  		uint32_t linestart = data->line[line++];
  		uint32_t linelen = data->line[line] - linestart;
  		char *buffer = data->buf + linestart;
  
  		if (!highlight) {
  			phpdbg_write("line", "line=\"%u\" code=\"%.*s\"", " %05u: %.*s", line, linelen, buffer);
  		} else {
  			if (highlight != line) {
  				phpdbg_write("line", "line=\"%u\" code=\"%.*s\"", " %05u: %.*s", line, linelen, buffer);
  			} else {
  				phpdbg_write("line", "line=\"%u\" code=\"%.*s\" current=\"current\"", ">%05u: %.*s", line, linelen, buffer);
  			}
  		}
  
  		if (*(buffer + linelen - 1) != '\n' || !linelen) {
  			phpdbg_out("\n");
  		}
  	}
  
  	phpdbg_xml("</list>");
  } /* }}} */
  
  void phpdbg_list_function(const zend_function *fbc) /* {{{ */
  {
  	const zend_op_array *ops;
  
  	if (fbc->type != ZEND_USER_FUNCTION) {
  		phpdbg_error("list", "type=\"internalfunction\" function=\"%s\"", "The function requested (%s) is not user defined", ZSTR_VAL(fbc->common.function_name));
  		return;
  	}
  
  	ops = (zend_op_array *) fbc;
  
  	phpdbg_list_file(ops->filename, ops->line_end - ops->line_start + 1, ops->line_start, 0);
  } /* }}} */
  
  void phpdbg_list_function_byname(const char *str, size_t len) /* {{{ */
  {
  	HashTable *func_table = EG(function_table);
  	zend_function* fbc;
  	char *func_name = (char*) str;
  	size_t func_name_len = len;
  
  	/* search active scope if begins with period */
  	if (func_name[0] == '.') {
  		zend_class_entry *scope = zend_get_executed_scope();
  		if (scope) {
  			func_name++;
  			func_name_len--;
  
  			func_table = &scope->function_table;
  		} else {
  			phpdbg_error("inactive", "type=\"noclasses\"", "No active class");
  			return;
  		}
  	} else if (!EG(function_table)) {
  		phpdbg_error("inactive", "type=\"function_table\"", "No function table loaded");
  		return;
  	} else {
  		func_table = EG(function_table);
  	}
  
  	/* use lowercase names, case insensitive */
  	func_name = zend_str_tolower_dup(func_name, func_name_len);
  
  	phpdbg_try_access {
  		if ((fbc = zend_hash_str_find_ptr(func_table, func_name, func_name_len))) {
  			phpdbg_list_function(fbc);
  		} else {
  			phpdbg_error("list", "type=\"nofunction\" function=\"%s\"", "Function %s not found", func_name);
  		}
  	} phpdbg_catch_access {
  		phpdbg_error("signalsegv", "function=\"%s\"", "Could not list function %s, invalid data source", func_name);
  	} phpdbg_end_try_access();
  
  	efree(func_name);
  } /* }}} */
  
  /* Note: do not free the original file handler, let original compile_file() or caller do that. Caller may rely on its value to check success */
  zend_op_array *phpdbg_compile_file(zend_file_handle *file, int type) {
  	phpdbg_file_source data, *dataptr;
  	zend_op_array *ret;
  	uint32_t line;
  	char *bufptr, *endptr;
  	size_t len;
  
  	/* Copy file contents before calling original compile_file,
  	 * as it may invalidate the file handle. */
  	if (zend_stream_fixup(file, &bufptr, &len) == FAILURE) {
  		if (type == ZEND_REQUIRE) {
  			zend_message_dispatcher(ZMSG_FAILED_REQUIRE_FOPEN, file->filename);
  			zend_bailout();
  		} else {
  			zend_message_dispatcher(ZMSG_FAILED_INCLUDE_FOPEN, file->filename);
  		}
  	}
  
  	data.buf = estrndup(bufptr, len);
  	data.len = len;
  
  	ret = PHPDBG_G(compile_file)(file, type);
  	if (ret == NULL) {
  		efree(data.buf);
  		return ret;
  	}
  
  	data.buf[data.len] = '\0';
  	data.line[0] = 0;
  	*(dataptr = emalloc(sizeof(phpdbg_file_source) + sizeof(uint32_t) * data.len)) = data;
  
  	for (line = 0, bufptr = data.buf - 1, endptr = data.buf + data.len; ++bufptr < endptr;) {
  		if (*bufptr == '\n') {
  			dataptr->line[++line] = (uint32_t)(bufptr - data.buf) + 1;
  		}
  	}
  
  	dataptr->lines = ++line;
  	dataptr = erealloc(dataptr, sizeof(phpdbg_file_source) + sizeof(uint32_t) * line);
  	dataptr->line[line] = endptr - data.buf;
  
  	zend_hash_del(&PHPDBG_G(file_sources), ret->filename);
  	zend_hash_add_ptr(&PHPDBG_G(file_sources), ret->filename, dataptr);
  	phpdbg_resolve_pending_file_break(ZSTR_VAL(ret->filename));
  
  	return ret;
  }
  
  zend_op_array *phpdbg_init_compile_file(zend_file_handle *file, int type) {
  	char *filename = (char *)(file->opened_path ? ZSTR_VAL(file->opened_path) : file->filename);
  	char resolved_path_buf[MAXPATHLEN];
  	zend_op_array *op_array;
  	phpdbg_file_source *dataptr;
  
  	if (VCWD_REALPATH(filename, resolved_path_buf)) {
  		filename = resolved_path_buf;
  
  		if (file->opened_path) {
  			zend_string_release(file->opened_path);
  			file->opened_path = zend_string_init(filename, strlen(filename), 0);
  		} else {
  			if (file->free_filename) {
  				efree((char *) file->filename);
  			}
  			file->free_filename = 0;
  			file->filename = filename;
  		}
  	}
  
  	op_array = PHPDBG_G(init_compile_file)(file, type);
  
  	if (op_array == NULL) {
  		return NULL;
  	}
  
  	dataptr = zend_hash_find_ptr(&PHPDBG_G(file_sources), op_array->filename);
  	ZEND_ASSERT(dataptr != NULL);
  
  	dataptr->op_array = *op_array;
  	if (dataptr->op_array.refcount) {
  		++*dataptr->op_array.refcount;
  	}
  
  	return op_array;
  }
  
  zend_op_array *phpdbg_compile_string(zval *source_string, char *filename) {
  	zend_string *fake_name;
  	zend_op_array *op_array;
  	phpdbg_file_source *dataptr;
  	uint32_t line;
  	char *bufptr, *endptr;
  
  	if (PHPDBG_G(flags) & PHPDBG_IN_EVAL) {
  		return PHPDBG_G(compile_string)(source_string, filename);
  	}
  
  	dataptr = emalloc(sizeof(phpdbg_file_source) + sizeof(uint32_t) * Z_STRLEN_P(source_string));
  	dataptr->buf = estrndup(Z_STRVAL_P(source_string), Z_STRLEN_P(source_string));
  	dataptr->len = Z_STRLEN_P(source_string);
  	dataptr->line[0] = 0;
  	for (line = 0, bufptr = dataptr->buf - 1, endptr = dataptr->buf + dataptr->len; ++bufptr < endptr;) {
  		if (*bufptr == '\n') {
  			dataptr->line[++line] = (uint32_t)(bufptr - dataptr->buf) + 1;
  		}
  	}
  	dataptr->lines = ++line;
  	dataptr->line[line] = endptr - dataptr->buf;
  
  	op_array = PHPDBG_G(compile_string)(source_string, filename);
  
  	if (op_array == NULL) {
  		efree(dataptr->buf);
  		efree(dataptr);
  		return NULL;
  	}
  
  	fake_name = strpprintf(0, "%s%c%p", filename, 0, op_array->opcodes);
  
  	dataptr = erealloc(dataptr, sizeof(phpdbg_file_source) + sizeof(uint32_t) * line);
  	zend_hash_add_ptr(&PHPDBG_G(file_sources), fake_name, dataptr);
  
  	zend_string_release(fake_name);
  
  	dataptr->op_array = *op_array;
  	if (dataptr->op_array.refcount) {
  		++*dataptr->op_array.refcount;
  	}
  
  	return op_array;
  }
  
  void phpdbg_init_list(void) {
  	PHPDBG_G(compile_file) = zend_compile_file;
  	PHPDBG_G(compile_string) = zend_compile_string;
  	zend_compile_file = phpdbg_compile_file;
  	zend_compile_string = phpdbg_compile_string;
  }
  
  void phpdbg_list_update(void) {
  	PHPDBG_G(init_compile_file) = zend_compile_file;
  	zend_compile_file = phpdbg_init_compile_file;
  }
  