text: /*
   * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
   *
   * Parts came from builtin-annotate.c, see those files for further
   * copyright notes.
   *
   * Released under the GPL v2. (and only v2, not any later version)
   */
  
  #include "util.h"
  #include "ui/ui.h"
  #include "sort.h"
  #include "build-id.h"
  #include "color.h"
  #include "cache.h"
  #include "symbol.h"
  #include "debug.h"
  #include "annotate.h"
  #include "evsel.h"
  #include <regex.h>
  #include <pthread.h>
  #include <linux/bitops.h>
  
  const char 	*disassembler_style;
  const char	*objdump_path;
  static regex_t	 file_lineno;
  
  static struct ins *ins__find(const char *name);
  static int disasm_line__parse(char *line, char **namep, char **rawp);
  
  static void ins__delete(struct ins_operands *ops)
  {
  	if (ops == NULL)
  		return;
  	zfree(&ops->source.raw);
  	zfree(&ops->source.name);
  	zfree(&ops->target.raw);
  	zfree(&ops->target.name);
  }
  
  static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size,
  			      struct ins_operands *ops)
  {
  	return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->raw);
  }
  
  int ins__scnprintf(struct ins *ins, char *bf, size_t size,
  		  struct ins_operands *ops)
  {
  	if (ins->ops->scnprintf)
  		return ins->ops->scnprintf(ins, bf, size, ops);
  
  	return ins__raw_scnprintf(ins, bf, size, ops);
  }
  
  static int call__parse(struct ins_operands *ops)
  {
  	char *endptr, *tok, *name;
  
  	ops->target.addr = strtoull(ops->raw, &endptr, 16);
  
  	name = strchr(endptr, '<');
  	if (name == NULL)
  		goto indirect_call;
  
  	name++;
  
  	tok = strchr(name, '>');
  	if (tok == NULL)
  		return -1;
  
  	*tok = '\0';
  	ops->target.name = strdup(name);
  	*tok = '>';
  
  	return ops->target.name == NULL ? -1 : 0;
  
  indirect_call:
  	tok = strchr(endptr, '(');
  	if (tok != NULL) {
  		ops->target.addr = 0;
  		return 0;
  	}
  
  	tok = strchr(endptr, '*');
  	if (tok == NULL)
  		return -1;
  
  	ops->target.addr = strtoull(tok + 1, NULL, 16);
  	return 0;
  }
  
  static int call__scnprintf(struct ins *ins, char *bf, size_t size,
  			   struct ins_operands *ops)
  {
  	if (ops->target.name)
  		return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->target.name);
  
  	if (ops->target.addr == 0)
  		return ins__raw_scnprintf(ins, bf, size, ops);
  
  	return scnprintf(bf, size, "%-6.6s *%" PRIx64, ins->name, ops->target.addr);
  }
  
  static struct ins_ops call_ops = {
  	.parse	   = call__parse,
  	.scnprintf = call__scnprintf,
  };
  
  bool ins__is_call(const struct ins *ins)
  {
  	return ins->ops == &call_ops;
  }
  
  static int jump__parse(struct ins_operands *ops)
  {
  	const char *s = strchr(ops->raw, '+');
  
  	ops->target.addr = strtoull(ops->raw, NULL, 16);
  
  	if (s++ != NULL)
  		ops->target.offset = strtoull(s, NULL, 16);
  	else
  		ops->target.offset = UINT64_MAX;
  
  	return 0;
  }
  
  static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
  			   struct ins_operands *ops)
  {
  	return scnprintf(bf, size, "%-6.6s %" PRIx64, ins->name, ops->target.offset);
  }
  
  static struct ins_ops jump_ops = {
  	.parse	   = jump__parse,
  	.scnprintf = jump__scnprintf,
  };
  
  bool ins__is_jump(const struct ins *ins)
  {
  	return ins->ops == &jump_ops;
  }
  
  static int comment__symbol(char *raw, char *comment, u64 *addrp, char **namep)
  {
  	char *endptr, *name, *t;
  
  	if (strstr(raw, "(%rip)") == NULL)
  		return 0;
  
  	*addrp = strtoull(comment, &endptr, 16);
  	name = strchr(endptr, '<');
  	if (name == NULL)
  		return -1;
  
  	name++;
  
  	t = strchr(name, '>');
  	if (t == NULL)
  		return 0;
  
  	*t = '\0';
  	*namep = strdup(name);
  	*t = '>';
  
  	return 0;
  }
  
  static int lock__parse(struct ins_operands *ops)
  {
  	char *name;
  
  	ops->locked.ops = zalloc(sizeof(*ops->locked.ops));
  	if (ops->locked.ops == NULL)
  		return 0;
  
  	if (disasm_line__parse(ops->raw, &name, &ops->locked.ops->raw) < 0)
  		goto out_free_ops;
  
  	ops->locked.ins = ins__find(name);
  	free(name);
  
  	if (ops->locked.ins == NULL)
  		goto out_free_ops;
  
  	if (!ops->locked.ins->ops)
  		return 0;
  
  	if (ops->locked.ins->ops->parse &&
  	    ops->locked.ins->ops->parse(ops->locked.ops) < 0)
  		goto out_free_ops;
  
  	return 0;
  
  out_free_ops:
  	zfree(&ops->locked.ops);
  	return 0;
  }
  
  static int lock__scnprintf(struct ins *ins, char *bf, size_t size,
  			   struct ins_operands *ops)
  {
  	int printed;
  
  	if (ops->locked.ins == NULL)
  		return ins__raw_scnprintf(ins, bf, size, ops);
  
  	printed = scnprintf(bf, size, "%-6.6s ", ins->name);
  	return printed + ins__scnprintf(ops->locked.ins, bf + printed,
  					size - printed, ops->locked.ops);
  }
  
  static void lock__delete(struct ins_operands *ops)
  {
  	struct ins *ins = ops->locked.ins;
  
  	if (ins && ins->ops->free)
  		ins->ops->free(ops->locked.ops);
  	else
  		ins__delete(ops->locked.ops);
  
  	zfree(&ops->locked.ops);
  	zfree(&ops->target.raw);
  	zfree(&ops->target.name);
  }
  
  static struct ins_ops lock_ops = {
  	.free	   = lock__delete,
  	.parse	   = lock__parse,
  	.scnprintf = lock__scnprintf,
  };
  
  static int mov__parse(struct ins_operands *ops)
  {
  	char *s = strchr(ops->raw, ','), *target, *comment, prev;
  
  	if (s == NULL)
  		return -1;
  
  	*s = '\0';
  	ops->source.raw = strdup(ops->raw);
  	*s = ',';
  
  	if (ops->source.raw == NULL)
  		return -1;
  
  	target = ++s;
  	comment = strchr(s, '#');
  
  	if (comment != NULL)
  		s = comment - 1;
  	else
  		s = strchr(s, '\0') - 1;
  
  	while (s > target && isspace(s[0]))
  		--s;
  	s++;
  	prev = *s;
  	*s = '\0';
  
  	ops->target.raw = strdup(target);
  	*s = prev;
  
  	if (ops->target.raw == NULL)
  		goto out_free_source;
  
  	if (comment == NULL)
  		return 0;
  
  	while (comment[0] != '\0' && isspace(comment[0]))
  		++comment;
  
  	comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name);
  	comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
  
  	return 0;
  
  out_free_source:
  	zfree(&ops->source.raw);
  	return -1;
  }
  
  static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
  			   struct ins_operands *ops)
  {
  	return scnprintf(bf, size, "%-6.6s %s,%s", ins->name,
  			 ops->source.name ?: ops->source.raw,
  			 ops->target.name ?: ops->target.raw);
  }
  
  static struct ins_ops mov_ops = {
  	.parse	   = mov__parse,
  	.scnprintf = mov__scnprintf,
  };
  
  static int dec__parse(struct ins_operands *ops)
  {
  	char *target, *comment, *s, prev;
  
  	target = s = ops->raw;
  
  	while (s[0] != '\0' && !isspace(s[0]))
  		++s;
  	prev = *s;
  	*s = '\0';
  
  	ops->target.raw = strdup(target);
  	*s = prev;
  
  	if (ops->target.raw == NULL)
  		return -1;
  
  	comment = strchr(s, '#');
  	if (comment == NULL)
  		return 0;
  
  	while (comment[0] != '\0' && isspace(comment[0]))
  		++comment;
  
  	comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
  
  	return 0;
  }
  
  static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
  			   struct ins_operands *ops)
  {
  	return scnprintf(bf, size, "%-6.6s %s", ins->name,
  			 ops->target.name ?: ops->target.raw);
  }
  
  static struct ins_ops dec_ops = {
  	.parse	   = dec__parse,
  	.scnprintf = dec__scnprintf,
  };
  
  static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
  			  struct ins_operands *ops __maybe_unused)
  {
  	return scnprintf(bf, size, "%-6.6s", "nop");
  }
  
  static struct ins_ops nop_ops = {
  	.scnprintf = nop__scnprintf,
  };
  
  /*
   * Must be sorted by name!
   */
  static struct ins instructions[] = {
  	{ .name = "add",   .ops  = &mov_ops, },
  	{ .name = "addl",  .ops  = &mov_ops, },
  	{ .name = "addq",  .ops  = &mov_ops, },
  	{ .name = "addw",  .ops  = &mov_ops, },
  	{ .name = "and",   .ops  = &mov_ops, },
  	{ .name = "bts",   .ops  = &mov_ops, },
  	{ .name = "call",  .ops  = &call_ops, },
  	{ .name = "callq", .ops  = &call_ops, },
  	{ .name = "cmp",   .ops  = &mov_ops, },
  	{ .name = "cmpb",  .ops  = &mov_ops, },
  	{ .name = "cmpl",  .ops  = &mov_ops, },
  	{ .name = "cmpq",  .ops  = &mov_ops, },
  	{ .name = "cmpw",  .ops  = &mov_ops, },
  	{ .name = "cmpxch", .ops  = &mov_ops, },
  	{ .name = "dec",   .ops  = &dec_ops, },
  	{ .name = "decl",  .ops  = &dec_ops, },
  	{ .name = "imul",  .ops  = &mov_ops, },
  	{ .name = "inc",   .ops  = &dec_ops, },
  	{ .name = "incl",  .ops  = &dec_ops, },
  	{ .name = "ja",	   .ops  = &jump_ops, },
  	{ .name = "jae",   .ops  = &jump_ops, },
  	{ .name = "jb",	   .ops  = &jump_ops, },
  	{ .name = "jbe",   .ops  = &jump_ops, },
  	{ .name = "jc",	   .ops  = &jump_ops, },
  	{ .name = "jcxz",  .ops  = &jump_ops, },
  	{ .name = "je",	   .ops  = &jump_ops, },
  	{ .name = "jecxz", .ops  = &jump_ops, },
  	{ .name = "jg",	   .ops  = &jump_ops, },
  	{ .name = "jge",   .ops  = &jump_ops, },
  	{ .name = "jl",    .ops  = &jump_ops, },
  	{ .name = "jle",   .ops  = &jump_ops, },
  	{ .name = "jmp",   .ops  = &jump_ops, },
  	{ .name = "jmpq",  .ops  = &jump_ops, },
  	{ .name = "jna",   .ops  = &jump_ops, },
  	{ .name = "jnae",  .ops  = &jump_ops, },
  	{ .name = "jnb",   .ops  = &jump_ops, },
  	{ .name = "jnbe",  .ops  = &jump_ops, },
  	{ .name = "jnc",   .ops  = &jump_ops, },
  	{ .name = "jne",   .ops  = &jump_ops, },
  	{ .name = "jng",   .ops  = &jump_ops, },
  	{ .name = "jnge",  .ops  = &jump_ops, },
  	{ .name = "jnl",   .ops  = &jump_ops, },
  	{ .name = "jnle",  .ops  = &jump_ops, },
  	{ .name = "jno",   .ops  = &jump_ops, },
  	{ .name = "jnp",   .ops  = &jump_ops, },
  	{ .name = "jns",   .ops  = &jump_ops, },
  	{ .name = "jnz",   .ops  = &jump_ops, },
  	{ .name = "jo",	   .ops  = &jump_ops, },
  	{ .name = "jp",	   .ops  = &jump_ops, },
  	{ .name = "jpe",   .ops  = &jump_ops, },
  	{ .name = "jpo",   .ops  = &jump_ops, },
  	{ .name = "jrcxz", .ops  = &jump_ops, },
  	{ .name = "js",	   .ops  = &jump_ops, },
  	{ .name = "jz",	   .ops  = &jump_ops, },
  	{ .name = "lea",   .ops  = &mov_ops, },
  	{ .name = "lock",  .ops  = &lock_ops, },
  	{ .name = "mov",   .ops  = &mov_ops, },
  	{ .name = "movb",  .ops  = &mov_ops, },
  	{ .name = "movdqa",.ops  = &mov_ops, },
  	{ .name = "movl",  .ops  = &mov_ops, },
  	{ .name = "movq",  .ops  = &mov_ops, },
  	{ .name = "movslq", .ops  = &mov_ops, },
  	{ .name = "movzbl", .ops  = &mov_ops, },
  	{ .name = "movzwl", .ops  = &mov_ops, },
  	{ .name = "nop",   .ops  = &nop_ops, },
  	{ .name = "nopl",  .ops  = &nop_ops, },
  	{ .name = "nopw",  .ops  = &nop_ops, },
  	{ .name = "or",    .ops  = &mov_ops, },
  	{ .name = "orl",   .ops  = &mov_ops, },
  	{ .name = "test",  .ops  = &mov_ops, },
  	{ .name = "testb", .ops  = &mov_ops, },
  	{ .name = "testl", .ops  = &mov_ops, },
  	{ .name = "xadd",  .ops  = &mov_ops, },
  	{ .name = "xbeginl", .ops  = &jump_ops, },
  	{ .name = "xbeginq", .ops  = &jump_ops, },
  };
  
  static int ins__cmp(const void *name, const void *insp)
  {
  	const struct ins *ins = insp;
  
  	return strcmp(name, ins->name);
  }
  
  static struct ins *ins__find(const char *name)
  {
  	const int nmemb = ARRAY_SIZE(instructions);
  
  	return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__cmp);
  }
  
  int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym)
  {
  	struct annotation *notes = symbol__annotation(sym);
  	pthread_mutex_init(&notes->lock, NULL);
  	return 0;
  }
  
  int symbol__alloc_hist(struct symbol *sym)
  {
  	struct annotation *notes = symbol__annotation(sym);
  	const size_t size = symbol__size(sym);
  	size_t sizeof_sym_hist;
  
  	/* Check for overflow when calculating sizeof_sym_hist */
  	if (size > (SIZE_MAX - sizeof(struct sym_hist)) / sizeof(u64))
  		return -1;
  
  	sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64));
  
  	/* Check for overflow in zalloc argument */
  	if (sizeof_sym_hist > (SIZE_MAX - sizeof(*notes->src))
  				/ symbol_conf.nr_events)
  		return -1;
  
  	notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist);
  	if (notes->src == NULL)
  		return -1;
  	notes->src->sizeof_sym_hist = sizeof_sym_hist;
  	notes->src->nr_histograms   = symbol_conf.nr_events;
  	INIT_LIST_HEAD(&notes->src->source);
  	return 0;
  }
  
  /* The cycles histogram is lazily allocated. */
  static int symbol__alloc_hist_cycles(struct symbol *sym)
  {
  	struct annotation *notes = symbol__annotation(sym);
  	const size_t size = symbol__size(sym);
  
  	notes->src->cycles_hist = calloc(size, sizeof(struct cyc_hist));
  	if (notes->src->cycles_hist == NULL)
  		return -1;
  	return 0;
  }
  
  void symbol__annotate_zero_histograms(struct symbol *sym)
  {
  	struct annotation *notes = symbol__annotation(sym);
  
  	pthread_mutex_lock(&notes->lock);
  	if (notes->src != NULL) {
  		memset(notes->src->histograms, 0,
  		       notes->src->nr_histograms * notes->src->sizeof_sym_hist);
  		if (notes->src->cycles_hist)
  			memset(notes->src->cycles_hist, 0,
  				symbol__size(sym) * sizeof(struct cyc_hist));
  	}
  	pthread_mutex_unlock(&notes->lock);
  }
  
  static int __symbol__account_cycles(struct annotation *notes,
  				    u64 start,
  				    unsigned offset, unsigned cycles,
  				    unsigned have_start)
  {
  	struct cyc_hist *ch;
  
  	ch = notes->src->cycles_hist;
  	/*
  	 * For now we can only account one basic block per
  	 * final jump. But multiple could be overlapping.
  	 * Always account the longest one. So when
  	 * a shorter one has been already seen throw it away.
  	 *
  	 * We separately always account the full cycles.
  	 */
  	ch[offset].num_aggr++;
  	ch[offset].cycles_aggr += cycles;
  
  	if (!have_start && ch[offset].have_start)
  		return 0;
  	if (ch[offset].num) {
  		if (have_start && (!ch[offset].have_start ||
  				   ch[offset].start > start)) {
  			ch[offset].have_start = 0;
  			ch[offset].cycles = 0;
  			ch[offset].num = 0;
  			if (ch[offset].reset < 0xffff)
  				ch[offset].reset++;
  		} else if (have_start &&
  			   ch[offset].start < start)
  			return 0;
  	}
  	ch[offset].have_start = have_start;
  	ch[offset].start = start;
  	ch[offset].cycles += cycles;
  	ch[offset].num++;
  	return 0;
  }
  
  static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
  				      struct annotation *notes, int evidx, u64 addr)
  {
  	unsigned offset;
  	struct sym_hist *h;
  
  	pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
  
  	if (addr < sym->start || addr >= sym->end)
  		return -ERANGE;
  
  	offset = addr - sym->start;
  	h = annotation__histogram(notes, evidx);
  	h->sum++;
  	h->addr[offset]++;
  
  	pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
  		  ", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
  		  addr, addr - sym->start, evidx, h->addr[offset]);
  	return 0;
  }
  
  static struct annotation *symbol__get_annotation(struct symbol *sym, bool cycles)
  {
  	struct annotation *notes = symbol__annotation(sym);
  
  	if (notes->src == NULL) {
  		if (symbol__alloc_hist(sym) < 0)
  			return NULL;
  	}
  	if (!notes->src->cycles_hist && cycles) {
  		if (symbol__alloc_hist_cycles(sym) < 0)
  			return NULL;
  	}
  	return notes;
  }
  
  static int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
  				    int evidx, u64 addr)
  {
  	struct annotation *notes;
  
  	if (sym == NULL)
  		return 0;
  	notes = symbol__get_annotation(sym, false);
  	if (notes == NULL)
  		return -ENOMEM;
  	return __symbol__inc_addr_samples(sym, map, notes, evidx, addr);
  }
  
  static int symbol__account_cycles(u64 addr, u64 start,
  				  struct symbol *sym, unsigned cycles)
  {
  	struct annotation *notes;
  	unsigned offset;
  
  	if (sym == NULL)
  		return 0;
  	notes = symbol__get_annotation(sym, true);
  	if (notes == NULL)
  		return -ENOMEM;
  	if (addr < sym->start || addr >= sym->end)
  		return -ERANGE;
  
  	if (start) {
  		if (start < sym->start || start >= sym->end)
  			return -ERANGE;
  		if (start >= addr)
  			start = 0;
  	}
  	offset = addr - sym->start;
  	return __symbol__account_cycles(notes,
  					start ? start - sym->start : 0,
  					offset, cycles,
  					!!start);
  }
  
  int addr_map_symbol__account_cycles(struct addr_map_symbol *ams,
  				    struct addr_map_symbol *start,
  				    unsigned cycles)
  {
  	u64 saddr = 0;
  	int err;
  
  	if (!cycles)
  		return 0;
  
  	/*
  	 * Only set start when IPC can be computed. We can only
  	 * compute it when the basic block is completely in a single
  	 * function.
  	 * Special case the case when the jump is elsewhere, but
  	 * it starts on the function start.
  	 */
  	if (start &&
  		(start->sym == ams->sym ||
  		 (ams->sym &&
  		   start->addr == ams->sym->start + ams->map->start)))
  		saddr = start->al_addr;
  	if (saddr == 0)
  		pr_debug2("BB with bad start: addr %"PRIx64" start %"PRIx64" sym %"PRIx64" saddr %"PRIx64"\n",
  			ams->addr,
  			start ? start->addr : 0,
  			ams->sym ? ams->sym->start + ams->map->start : 0,
  			saddr);
  	err = symbol__account_cycles(ams->al_addr, saddr, ams->sym, cycles);
  	if (err)
  		pr_debug2("account_cycles failed %d\n", err);
  	return err;
  }
  
  int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, int evidx)
  {
  	return symbol__inc_addr_samples(ams->sym, ams->map, evidx, ams->al_addr);
  }
  
  int hist_entry__inc_addr_samples(struct hist_entry *he, int evidx, u64 ip)
  {
  	return symbol__inc_addr_samples(he->ms.sym, he->ms.map, evidx, ip);
  }
  
  static void disasm_line__init_ins(struct disasm_line *dl)
  {
  	dl->ins = ins__find(dl->name);
  
  	if (dl->ins == NULL)
  		return;
  
  	if (!dl->ins->ops)
  		return;
  
  	if (dl->ins->ops->parse && dl->ins->ops->parse(&dl->ops) < 0)
  		dl->ins = NULL;
  }
  
  static int disasm_line__parse(char *line, char **namep, char **rawp)
  {
  	char *name = line, tmp;
  
  	while (isspace(name[0]))
  		++name;
  
  	if (name[0] == '\0')
  		return -1;
  
  	*rawp = name + 1;
  
  	while ((*rawp)[0] != '\0' && !isspace((*rawp)[0]))
  		++*rawp;
  
  	tmp = (*rawp)[0];
  	(*rawp)[0] = '\0';
  	*namep = strdup(name);
  
  	if (*namep == NULL)
  		goto out_free_name;
  
  	(*rawp)[0] = tmp;
  
  	if ((*rawp)[0] != '\0') {
  		(*rawp)++;
  		while (isspace((*rawp)[0]))
  			++(*rawp);
  	}
  
  	return 0;
  
  out_free_name:
  	zfree(namep);
  	return -1;
  }
  
  static struct disasm_line *disasm_line__new(s64 offset, char *line,
  					size_t privsize, int line_nr)
  {
  	struct disasm_line *dl = zalloc(sizeof(*dl) + privsize);
  
  	if (dl != NULL) {
  		dl->offset = offset;
  		dl->line = strdup(line);
  		dl->line_nr = line_nr;
  		if (dl->line == NULL)
  			goto out_delete;
  
  		if (offset != -1) {
  			if (disasm_line__parse(dl->line, &dl->name, &dl->ops.raw) < 0)
  				goto out_free_line;
  
  			disasm_line__init_ins(dl);
  		}
  	}
  
  	return dl;
  
  out_free_line:
  	zfree(&dl->line);
  out_delete:
  	free(dl);
  	return NULL;
  }
  
  void disasm_line__free(struct disasm_line *dl)
  {
  	zfree(&dl->line);
  	zfree(&dl->name);
  	if (dl->ins && dl->ins->ops->free)
  		dl->ins->ops->free(&dl->ops);
  	else
  		ins__delete(&dl->ops);
  	free(dl);
  }
  
  int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw)
  {
  	if (raw || !dl->ins)
  		return scnprintf(bf, size, "%-6.6s %s", dl->name, dl->ops.raw);
  
  	return ins__scnprintf(dl->ins, bf, size, &dl->ops);
  }
  
  static void disasm__add(struct list_head *head, struct disasm_line *line)
  {
  	list_add_tail(&line->node, head);
  }
  
  struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos)
  {
  	list_for_each_entry_continue(pos, head, node)
  		if (pos->offset >= 0)
  			return pos;
  
  	return NULL;
  }
  
  double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
  			    s64 end, const char **path, u64 *nr_samples)
  {
  	struct source_line *src_line = notes->src->lines;
  	double percent = 0.0;
  	*nr_samples = 0;
  
  	if (src_line) {
  		size_t sizeof_src_line = sizeof(*src_line) +
  				sizeof(src_line->samples) * (src_line->nr_pcnt - 1);
  
  		while (offset < end) {
  			src_line = (void *)notes->src->lines +
  					(sizeof_src_line * offset);
  
  			if (*path == NULL)
  				*path = src_line->path;
  
  			percent += src_line->samples[evidx].percent;
  			*nr_samples += src_line->samples[evidx].nr;
  			offset++;
  		}
  	} else {
  		struct sym_hist *h = annotation__histogram(notes, evidx);
  		unsigned int hits = 0;
  
  		while (offset < end)
  			hits += h->addr[offset++];
  
  		if (h->sum) {
  			*nr_samples = hits;
  			percent = 100.0 * hits / h->sum;
  		}
  	}
  
  	return percent;
  }
  
  static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 start,
  		      struct perf_evsel *evsel, u64 len, int min_pcnt, int printed,
  		      int max_lines, struct disasm_line *queue)
  {
  	static const char *prev_line;
  	static const char *prev_color;
  
  	if (dl->offset != -1) {
  		const char *path = NULL;
  		u64 nr_samples;
  		double percent, max_percent = 0.0;
  		double *ppercents = &percent;
  		u64 *psamples = &nr_samples;
  		int i, nr_percent = 1;
  		const char *color;
  		struct annotation *notes = symbol__annotation(sym);
  		s64 offset = dl->offset;
  		const u64 addr = start + offset;
  		struct disasm_line *next;
  
  		next = disasm__get_next_ip_line(&notes->src->source, dl);
  
  		if (perf_evsel__is_group_event(evsel)) {
  			nr_percent = evsel->nr_members;
  			ppercents = calloc(nr_percent, sizeof(double));
  			psamples = calloc(nr_percent, sizeof(u64));
  			if (ppercents == NULL || psamples == NULL) {
  				return -1;
  			}
  		}
  
  		for (i = 0; i < nr_percent; i++) {
  			percent = disasm__calc_percent(notes,
  					notes->src->lines ? i : evsel->idx + i,
  					offset,
  					next ? next->offset : (s64) len,
  					&path, &nr_samples);
  
  			ppercents[i] = percent;
  			psamples[i] = nr_samples;
  			if (percent > max_percent)
  				max_percent = percent;
  		}
  
  		if (max_percent < min_pcnt)
  			return -1;
  
  		if (max_lines && printed >= max_lines)
  			return 1;
  
  		if (queue != NULL) {
  			list_for_each_entry_from(queue, &notes->src->source, node) {
  				if (queue == dl)
  					break;
  				disasm_line__print(queue, sym, start, evsel, len,
  						    0, 0, 1, NULL);
  			}
  		}
  
  		color = get_percent_color(max_percent);
  
  		/*
  		 * Also color the filename and line if needed, with
  		 * the same color than the percentage. Don't print it
  		 * twice for close colored addr with the same filename:line
  		 */
  		if (path) {
  			if (!prev_line || strcmp(prev_line, path)
  				       || color != prev_color) {
  				color_fprintf(stdout, color, " %s", path);
  				prev_line = path;
  				prev_color = color;
  			}
  		}
  
  		for (i = 0; i < nr_percent; i++) {
  			percent = ppercents[i];
  			nr_samples = psamples[i];
  			color = get_percent_color(percent);
  
  			if (symbol_conf.show_total_period)
  				color_fprintf(stdout, color, " %7" PRIu64,
  					      nr_samples);
  			else
  				color_fprintf(stdout, color, " %7.2f", percent);
  		}
  
  		printf(" :	");
  		color_fprintf(stdout, PERF_COLOR_MAGENTA, "  %" PRIx64 ":", addr);
  		color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", dl->line);
  
  		if (ppercents != &percent)
  			free(ppercents);
  
  		if (psamples != &nr_samples)
  			free(psamples);
  
  	} else if (max_lines && printed >= max_lines)
  		return 1;
  	else {
  		int width = 8;
  
  		if (queue)
  			return -1;
  
  		if (perf_evsel__is_group_event(evsel))
  			width *= evsel->nr_members;
  
  		if (!*dl->line)
  			printf(" %*s:\n", width, " ");
  		else
  			printf(" %*s:	%s\n", width, " ", dl->line);
  	}
  
  	return 0;
  }
  
  /*
   * symbol__parse_objdump_line() parses objdump output (with -d --no-show-raw)
   * which looks like following
   *
   *  0000000000415500 <_init>:
   *    415500:       sub    $0x8,%rsp
   *    415504:       mov    0x2f5ad5(%rip),%rax        # 70afe0 <_DYNAMIC+0x2f8>
   *    41550b:       test   %rax,%rax
   *    41550e:       je     415515 <_init+0x15>
   *    415510:       callq  416e70 <__gmon_start__@plt>
   *    415515:       add    $0x8,%rsp
   *    415519:       retq
   *
   * it will be parsed and saved into struct disasm_line as
   *  <offset>       <name>  <ops.raw>
   *
   * The offset will be a relative offset from the start of the symbol and -1
   * means that it's not a disassembly line so should be treated differently.
   * The ops.raw part will be parsed further according to type of the instruction.
   */
  static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
  				      FILE *file, size_t privsize,
  				      int *line_nr)
  {
  	struct annotation *notes = symbol__annotation(sym);
  	struct disasm_line *dl;
  	char *line = NULL, *parsed_line, *tmp, *tmp2, *c;
  	size_t line_len;
  	s64 line_ip, offset = -1;
  	regmatch_t match[2];
  
  	if (getline(&line, &line_len, file) < 0)
  		return -1;
  
  	if (!line)
  		return -1;
  
  	while (line_len != 0 && isspace(line[line_len - 1]))
  		line[--line_len] = '\0';
  
  	c = strchr(line, '\n');
  	if (c)
  		*c = 0;
  
  	line_ip = -1;
  	parsed_line = line;
  
  	/* /filename:linenr ? Save line number and ignore. */
  	if (regexec(&file_lineno, line, 2, match, 0) == 0) {
  		*line_nr = atoi(line + match[1].rm_so);
  		return 0;
  	}
  
  	/*
  	 * Strip leading spaces:
  	 */
  	tmp = line;
  	while (*tmp) {
  		if (*tmp != ' ')
  			break;
  		tmp++;
  	}
  
  	if (*tmp) {
  		/*
  		 * Parse hexa addresses followed by ':'
  		 */
  		line_ip = strtoull(tmp, &tmp2, 16);
  		if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0')
  			line_ip = -1;
  	}
  
  	if (line_ip != -1) {
  		u64 start = map__rip_2objdump(map, sym->start),
  		    end = map__rip_2objdump(map, sym->end);
  
  		offset = line_ip - start;
  		if ((u64)line_ip < start || (u64)line_ip >= end)
  			offset = -1;
  		else
  			parsed_line = tmp2 + 1;
  	}
  
  	dl = disasm_line__new(offset, parsed_line, privsize, *line_nr);
  	free(line);
  	(*line_nr)++;
  
  	if (dl == NULL)
  		return -1;
  
  	if (dl->ops.target.offset == UINT64_MAX)
  		dl->ops.target.offset = dl->ops.target.addr -
  					map__rip_2objdump(map, sym->start);
  
  	/* kcore has no symbols, so add the call target name */
  	if (dl->ins && ins__is_call(dl->ins) && !dl->ops.target.name) {
  		struct addr_map_symbol target = {
  			.map = map,
  			.addr = dl->ops.target.addr,
  		};
  
  		if (!map_groups__find_ams(&target, NULL) &&
  		    target.sym->start == target.al_addr)
  			dl->ops.target.name = strdup(target.sym->name);
  	}
  
  	disasm__add(&notes->src->source, dl);
  
  	return 0;
  }
  
  static __attribute__((constructor)) void symbol__init_regexpr(void)
  {
  	regcomp(&file_lineno, "^/[^:]+:([0-9]+)", REG_EXTENDED);
  }
  
  static void delete_last_nop(struct symbol *sym)
  {
  	struct annotation *notes = symbol__annotation(sym);
  	struct list_head *list = &notes->src->source;
  	struct disasm_line *dl;
  
  	while (!list_empty(list)) {
  		dl = list_entry(list->prev, struct disasm_line, node);
  
  		if (dl->ins && dl->ins->ops) {
  			if (dl->ins->ops != &nop_ops)
  				return;
  		} else {
  			if (!strstr(dl->line, " nop ") &&
  			    !strstr(dl->line, " nopl ") &&
  			    !strstr(dl->line, " nopw "))
  				return;
  		}
  
  		list_del(&dl->node);
  		disasm_line__free(dl);
  	}
  }
  
  int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
  {
  	struct dso *dso = map->dso;
  	char *filename = dso__build_id_filename(dso, NULL, 0);
  	bool free_filename = true;
  	char command[PATH_MAX * 2];
  	FILE *file;
  	int err = 0;
  	char symfs_filename[PATH_MAX];
  	struct kcore_extract kce;
  	bool delete_extract = false;
  	int lineno = 0;
  
  	if (filename)
  		symbol__join_symfs(symfs_filename, filename);
  
  	if (filename == NULL) {
  		if (dso->has_build_id) {
  			pr_err("Can't annotate %s: not enough memory\n",
  			       sym->name);
  			return -ENOMEM;
  		}
  		goto fallback;
  	} else if (dso__is_kcore(dso)) {
  		goto fallback;
  	} else if (readlink(symfs_filename, command, sizeof(command)) < 0 ||
  		   strstr(command, "[kernel.kallsyms]") ||
  		   access(symfs_filename, R_OK)) {
  		free(filename);
  fallback:
  		/*
  		 * If we don't have build-ids or the build-id file isn't in the
  		 * cache, or is just a kallsyms file, well, lets hope that this
  		 * DSO is the same as when 'perf record' ran.
  		 */
  		filename = (char *)dso->long_name;
  		symbol__join_symfs(symfs_filename, filename);
  		free_filename = false;
  	}
  
  	if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
  	    !dso__is_kcore(dso)) {
  		char bf[BUILD_ID_SIZE * 2 + 16] = " with build id ";
  		char *build_id_msg = NULL;
  
  		if (dso->annotate_warned)
  			goto out_free_filename;
  
  		if (dso->has_build_id) {
  			build_id__sprintf(dso->build_id,
  					  sizeof(dso->build_id), bf + 15);
  			build_id_msg = bf;
  		}
  		err = -ENOENT;
  		dso->annotate_warned = 1;
  		pr_err("Can't annotate %s:\n\n"
  		       "No vmlinux file%s\nwas found in the path.\n\n"
  		       "Note that annotation using /proc/kcore requires CAP_SYS_RAWIO capability.\n\n"
  		       "Please use:\n\n"
  		       "  perf buildid-cache -vu vmlinux\n\n"
  		       "or:\n\n"
  		       "  --vmlinux vmlinux\n",
  		       sym->name, build_id_msg ?: "");
  		goto out_free_filename;
  	}
  
  	pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
  		 filename, sym->name, map->unmap_ip(map, sym->start),
  		 map->unmap_ip(map, sym->end));
  
  	pr_debug("annotating [%p] %30s : [%p] %30s\n",
  		 dso, dso->long_name, sym, sym->name);
  
  	if (dso__is_kcore(dso)) {
  		kce.kcore_filename = symfs_filename;
  		kce.addr = map__rip_2objdump(map, sym->start);
  		kce.offs = sym->start;
  		kce.len = sym->end - sym->start;
  		if (!kcore_extract__create(&kce)) {
  			delete_extract = true;
  			strlcpy(symfs_filename, kce.extract_filename,
  				sizeof(symfs_filename));
  			if (free_filename) {
  				free(filename);
  				free_filename = false;
  			}
  			filename = symfs_filename;
  		}
  	} else if (dso__needs_decompress(dso)) {
  		char tmp[PATH_MAX];
  		struct kmod_path m;
  		int fd;
  		bool ret;
  
  		if (kmod_path__parse_ext(&m, symfs_filename))
  			goto out_free_filename;
  
  		snprintf(tmp, PATH_MAX, "/tmp/perf-kmod-XXXXXX");
  
  		fd = mkstemp(tmp);
  		if (fd < 0) {
  			free(m.ext);
  			goto out_free_filename;
  		}
  
  		ret = decompress_to_file(m.ext, symfs_filename, fd);
  
  		free(m.ext);
  		close(fd);
  
  		if (!ret)
  			goto out_free_filename;
  
  		strcpy(symfs_filename, tmp);
  	}
  
  	snprintf(command, sizeof(command),
  		 "%s %s%s --start-address=0x%016" PRIx64
  		 " --stop-address=0x%016" PRIx64
  		 " -l -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
  		 objdump_path ? objdump_path : "objdump",
  		 disassembler_style ? "-M " : "",
  		 disassembler_style ? disassembler_style : "",
  		 map__rip_2objdump(map, sym->start),
  		 map__rip_2objdump(map, sym->end),
  		 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
  		 symbol_conf.annotate_src ? "-S" : "",
  		 symfs_filename, filename);
  
  	pr_debug("Executing: %s\n", command);
  
  	file = popen(command, "r");
  	if (!file)
  		goto out_remove_tmp;
  
  	while (!feof(file))
  		if (symbol__parse_objdump_line(sym, map, file, privsize,
  			    &lineno) < 0)
  			break;
  
  	/*
  	 * kallsyms does not have symbol sizes so there may a nop at the end.
  	 * Remove it.
  	 */
  	if (dso__is_kcore(dso))
  		delete_last_nop(sym);
  
  	pclose(file);
  
  out_remove_tmp:
  	if (dso__needs_decompress(dso))
  		unlink(symfs_filename);
  out_free_filename:
  	if (delete_extract)
  		kcore_extract__delete(&kce);
  	if (free_filename)
  		free(filename);
  	return err;
  }
  
  static void insert_source_line(struct rb_root *root, struct source_line *src_line)
  {
  	struct source_line *iter;
  	struct rb_node **p = &root->rb_node;
  	struct rb_node *parent = NULL;
  	int i, ret;
  
  	while (*p != NULL) {
  		parent = *p;
  		iter = rb_entry(parent, struct source_line, node);
  
  		ret = strcmp(iter->path, src_line->path);
  		if (ret == 0) {
  			for (i = 0; i < src_line->nr_pcnt; i++)
  				iter->samples[i].percent_sum += src_line->samples[i].percent;
  			return;
  		}
  
  		if (ret < 0)
  			p = &(*p)->rb_left;
  		else
  			p = &(*p)->rb_right;
  	}
  
  	for (i = 0; i < src_line->nr_pcnt; i++)
  		src_line->samples[i].percent_sum = src_line->samples[i].percent;
  
  	rb_link_node(&src_line->node, parent, p);
  	rb_insert_color(&src_line->node, root);
  }
  
  static int cmp_source_line(struct source_line *a, struct source_line *b)
  {
  	int i;
  
  	for (i = 0; i < a->nr_pcnt; i++) {
  		if (a->samples[i].percent_sum == b->samples[i].percent_sum)
  			continue;
  		return a->samples[i].percent_sum > b->samples[i].percent_sum;
  	}
  
  	return 0;
  }
  
  static void __resort_source_line(struct rb_root *root, struct source_line *src_line)
  {
  	struct source_line *iter;
  	struct rb_node **p = &root->rb_node;
  	struct rb_node *parent = NULL;
  
  	while (*p != NULL) {
  		parent = *p;
  		iter = rb_entry(parent, struct source_line, node);
  
  		if (cmp_source_line(src_line, iter))
  			p = &(*p)->rb_left;
  		else
  			p = &(*p)->rb_right;
  	}
  
  	rb_link_node(&src_line->node, parent, p);
  	rb_insert_color(&src_line->node, root);
  }
  
  static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root)
  {
  	struct source_line *src_line;
  	struct rb_node *node;
  
  	node = rb_first(src_root);
  	while (node) {
  		struct rb_node *next;
  
  		src_line = rb_entry(node, struct source_line, node);
  		next = rb_next(node);
  		rb_erase(node, src_root);
  
  		__resort_source_line(dest_root, src_line);
  		node = next;
  	}
  }
  
  static void symbol__free_source_line(struct symbol *sym, int len)
  {
  	struct annotation *notes = symbol__annotation(sym);
  	struct source_line *src_line = notes->src->lines;
  	size_t sizeof_src_line;
  	int i;
  
  	sizeof_src_line = sizeof(*src_line) +
  			  (sizeof(src_line->samples) * (src_line->nr_pcnt - 1));
  
  	for (i = 0; i < len; i++) {
  		free_srcline(src_line->path);
  		src_line = (void *)src_line + sizeof_src_line;
  	}
  
  	zfree(&notes->src->lines);
  }
  
  /* Get the filename:line for the colored entries */
  static int symbol__get_source_line(struct symbol *sym, struct map *map,
  				   struct perf_evsel *evsel,
  				   struct rb_root *root, int len)
  {
  	u64 start;
  	int i, k;
  	int evidx = evsel->idx;
  	struct source_line *src_line;
  	struct annotation *notes = symbol__annotation(sym);
  	struct sym_hist *h = annotation__histogram(notes, evidx);
  	struct rb_root tmp_root = RB_ROOT;
  	int nr_pcnt = 1;
  	u64 h_sum = h->sum;
  	size_t sizeof_src_line = sizeof(struct source_line);
  
  	if (perf_evsel__is_group_event(evsel)) {
  		for (i = 1; i < evsel->nr_members; i++) {
  			h = annotation__histogram(notes, evidx + i);
  			h_sum += h->sum;
  		}
  		nr_pcnt = evsel->nr_members;
  		sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->samples);
  	}
  
  	if (!h_sum)
  		return 0;
  
  	src_line = notes->src->lines = calloc(len, sizeof_src_line);
  	if (!notes->src->lines)
  		return -1;
  
  	start = map__rip_2objdump(map, sym->start);
  
  	for (i = 0; i < len; i++) {
  		u64 offset;
  		double percent_max = 0.0;
  
  		src_line->nr_pcnt = nr_pcnt;
  
  		for (k = 0; k < nr_pcnt; k++) {
  			h = annotation__histogram(notes, evidx + k);
  			src_line->samples[k].percent = 100.0 * h->addr[i] / h->sum;
  
  			if (src_line->samples[k].percent > percent_max)
  				percent_max = src_line->samples[k].percent;
  		}
  
  		if (percent_max <= 0.5)
  			goto next;
  
  		offset = start + i;
  		src_line->path = get_srcline(map->dso, offset, NULL, false);
  		insert_source_line(&tmp_root, src_line);
  
  	next:
  		src_line = (void *)src_line + sizeof_src_line;
  	}
  
  	resort_source_line(root, &tmp_root);
  	return 0;
  }
  
  static void print_summary(struct rb_root *root, const char *filename)
  {
  	struct source_line *src_line;
  	struct rb_node *node;
  
  	printf("\nSorted summary for file %s\n", filename);
  	printf("----------------------------------------------\n\n");
  
  	if (RB_EMPTY_ROOT(root)) {
  		printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
  		return;
  	}
  
  	node = rb_first(root);
  	while (node) {
  		double percent, percent_max = 0.0;
  		const char *color;
  		char *path;
  		int i;
  
  		src_line = rb_entry(node, struct source_line, node);
  		for (i = 0; i < src_line->nr_pcnt; i++) {
  			percent = src_line->samples[i].percent_sum;
  			color = get_percent_color(percent);
  			color_fprintf(stdout, color, " %7.2f", percent);
  
  			if (percent > percent_max)
  				percent_max = percent;
  		}
  
  		path = src_line->path;
  		color = get_percent_color(percent_max);
  		color_fprintf(stdout, color, " %s\n", path);
  
  		node = rb_next(node);
  	}
  }
  
  static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
  {
  	struct annotation *notes = symbol__annotation(sym);
  	struct sym_hist *h = annotation__histogram(notes, evsel->idx);
  	u64 len = symbol__size(sym), offset;
  
  	for (offset = 0; offset < len; ++offset)
  		if (h->addr[offset] != 0)
  			printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
  			       sym->start + offset, h->addr[offset]);
  	printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
  }
  
  int symbol__annotate_printf(struct symbol *sym, struct map *map,
  			    struct perf_evsel *evsel, bool full_paths,
  			    int min_pcnt, int max_lines, int context)
  {
  	struct dso *dso = map->dso;
  	char *filename;
  	const char *d_filename;
  	const char *evsel_name = perf_evsel__name(evsel);
  	struct annotation *notes = symbol__annotation(sym);
  	struct disasm_line *pos, *queue = NULL;
  	u64 start = map__rip_2objdump(map, sym->start);
  	int printed = 2, queue_len = 0;
  	int more = 0;
  	u64 len;
  	int width = 8;
  	int namelen, evsel_name_len, graph_dotted_len;
  
  	filename = strdup(dso->long_name);
  	if (!filename)
  		return -ENOMEM;
  
  	if (full_paths)
  		d_filename = filename;
  	else
  		d_filename = basename(filename);
  
  	len = symbol__size(sym);
  	namelen = strlen(d_filename);
  	evsel_name_len = strlen(evsel_name);
  
  	if (perf_evsel__is_group_event(evsel))
  		width *= evsel->nr_members;
  
  	printf(" %-*.*s|	Source code & Disassembly of %s for %s\n",
  	       width, width, "Percent", d_filename, evsel_name);
  
  	graph_dotted_len = width + namelen + evsel_name_len;
  	printf("-%-*.*s-----------------------------------------\n",
  	       graph_dotted_len, graph_dotted_len, graph_dotted_line);
  
  	if (verbose)
  		symbol__annotate_hits(sym, evsel);
  
  	list_for_each_entry(pos, &notes->src->source, node) {
  		if (context && queue == NULL) {
  			queue = pos;
  			queue_len = 0;
  		}
  
  		switch (disasm_line__print(pos, sym, start, evsel, len,
  					    min_pcnt, printed, max_lines,
  					    queue)) {
  		case 0:
  			++printed;
  			if (context) {
  				printed += queue_len;
  				queue = NULL;
  				queue_len = 0;
  			}
  			break;
  		case 1:
  			/* filtered by max_lines */
  			++more;
  			break;
  		case -1:
  		default:
  			/*
  			 * Filtered by min_pcnt or non IP lines when
  			 * context != 0
  			 */
  			if (!context)
  				break;
  			if (queue_len == context)
  				queue = list_entry(queue->node.next, typeof(*queue), node);
  			else
  				++queue_len;
  			break;
  		}
  	}
  
  	free(filename);
  
  	return more;
  }
  
  void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
  {
  	struct annotation *notes = symbol__annotation(sym);
  	struct sym_hist *h = annotation__histogram(notes, evidx);
  
  	memset(h, 0, notes->src->sizeof_sym_hist);
  }
  
  void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
  {
  	struct annotation *notes = symbol__annotation(sym);
  	struct sym_hist *h = annotation__histogram(notes, evidx);
  	int len = symbol__size(sym), offset;
  
  	h->sum = 0;
  	for (offset = 0; offset < len; ++offset) {
  		h->addr[offset] = h->addr[offset] * 7 / 8;
  		h->sum += h->addr[offset];
  	}
  }
  
  void disasm__purge(struct list_head *head)
  {
  	struct disasm_line *pos, *n;
  
  	list_for_each_entry_safe(pos, n, head, node) {
  		list_del(&pos->node);
  		disasm_line__free(pos);
  	}
  }
  
  static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp)
  {
  	size_t printed;
  
  	if (dl->offset == -1)
  		return fprintf(fp, "%s\n", dl->line);
  
  	printed = fprintf(fp, "%#" PRIx64 " %s", dl->offset, dl->name);
  
  	if (dl->ops.raw[0] != '\0') {
  		printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ",
  				   dl->ops.raw);
  	}
  
  	return printed + fprintf(fp, "\n");
  }
  
  size_t disasm__fprintf(struct list_head *head, FILE *fp)
  {
  	struct disasm_line *pos;
  	size_t printed = 0;
  
  	list_for_each_entry(pos, head, node)
  		printed += disasm_line__fprintf(pos, fp);
  
  	return printed;
  }
  
  int symbol__tty_annotate(struct symbol *sym, struct map *map,
  			 struct perf_evsel *evsel, bool print_lines,
  			 bool full_paths, int min_pcnt, int max_lines)
  {
  	struct dso *dso = map->dso;
  	struct rb_root source_line = RB_ROOT;
  	u64 len;
  
  	if (symbol__annotate(sym, map, 0) < 0)
  		return -1;
  
  	len = symbol__size(sym);
  
  	if (print_lines) {
  		symbol__get_source_line(sym, map, evsel, &source_line, len);
  		print_summary(&source_line, dso->long_name);
  	}
  
  	symbol__annotate_printf(sym, map, evsel, full_paths,
  				min_pcnt, max_lines, 0);
  	if (print_lines)
  		symbol__free_source_line(sym, len);
  
  	disasm__purge(&symbol__annotation(sym)->src->source);
  
  	return 0;
  }
  
  int hist_entry__annotate(struct hist_entry *he, size_t privsize)
  {
  	return symbol__annotate(he->ms.sym, he->ms.map, privsize);
  }
  
  bool ui__has_annotation(void)
  {
  	return use_browser == 1 && sort__has_sym;
  }
  