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- // SPDX-License-Identifier: GPL-2.0
- #include <inttypes.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/zalloc.h>
- #include "util/dso.h"
- #include "util/debug.h"
- #include "util/callchain.h"
- #include "util/symbol_conf.h"
- #include "srcline.h"
- #include "string2.h"
- #include "symbol.h"
- bool srcline_full_filename;
- static const char *dso__name(struct dso *dso)
- {
- const char *dso_name;
- if (dso->symsrc_filename)
- dso_name = dso->symsrc_filename;
- else
- dso_name = dso->long_name;
- if (dso_name[0] == '[')
- return NULL;
- if (!strncmp(dso_name, "/tmp/perf-", 10))
- return NULL;
- return dso_name;
- }
- static int inline_list__append(struct symbol *symbol, char *srcline,
- struct inline_node *node)
- {
- struct inline_list *ilist;
- ilist = zalloc(sizeof(*ilist));
- if (ilist == NULL)
- return -1;
- ilist->symbol = symbol;
- ilist->srcline = srcline;
- if (callchain_param.order == ORDER_CALLEE)
- list_add_tail(&ilist->list, &node->val);
- else
- list_add(&ilist->list, &node->val);
- return 0;
- }
- /* basename version that takes a const input string */
- static const char *gnu_basename(const char *path)
- {
- const char *base = strrchr(path, '/');
- return base ? base + 1 : path;
- }
- static char *srcline_from_fileline(const char *file, unsigned int line)
- {
- char *srcline;
- if (!file)
- return NULL;
- if (!srcline_full_filename)
- file = gnu_basename(file);
- if (asprintf(&srcline, "%s:%u", file, line) < 0)
- return NULL;
- return srcline;
- }
- static struct symbol *new_inline_sym(struct dso *dso,
- struct symbol *base_sym,
- const char *funcname)
- {
- struct symbol *inline_sym;
- char *demangled = NULL;
- if (!funcname)
- funcname = "??";
- if (dso) {
- demangled = dso__demangle_sym(dso, 0, funcname);
- if (demangled)
- funcname = demangled;
- }
- if (base_sym && strcmp(funcname, base_sym->name) == 0) {
- /* reuse the real, existing symbol */
- inline_sym = base_sym;
- /* ensure that we don't alias an inlined symbol, which could
- * lead to double frees in inline_node__delete
- */
- assert(!base_sym->inlined);
- } else {
- /* create a fake symbol for the inline frame */
- inline_sym = symbol__new(base_sym ? base_sym->start : 0,
- base_sym ? (base_sym->end - base_sym->start) : 0,
- base_sym ? base_sym->binding : 0,
- base_sym ? base_sym->type : 0,
- funcname);
- if (inline_sym)
- inline_sym->inlined = 1;
- }
- free(demangled);
- return inline_sym;
- }
- #ifdef HAVE_LIBBFD_SUPPORT
- /*
- * Implement addr2line using libbfd.
- */
- #define PACKAGE "perf"
- #include <bfd.h>
- struct a2l_data {
- const char *input;
- u64 addr;
- bool found;
- const char *filename;
- const char *funcname;
- unsigned line;
- bfd *abfd;
- asymbol **syms;
- };
- static int bfd_error(const char *string)
- {
- const char *errmsg;
- errmsg = bfd_errmsg(bfd_get_error());
- fflush(stdout);
- if (string)
- pr_debug("%s: %s\n", string, errmsg);
- else
- pr_debug("%s\n", errmsg);
- return -1;
- }
- static int slurp_symtab(bfd *abfd, struct a2l_data *a2l)
- {
- long storage;
- long symcount;
- asymbol **syms;
- bfd_boolean dynamic = FALSE;
- if ((bfd_get_file_flags(abfd) & HAS_SYMS) == 0)
- return bfd_error(bfd_get_filename(abfd));
- storage = bfd_get_symtab_upper_bound(abfd);
- if (storage == 0L) {
- storage = bfd_get_dynamic_symtab_upper_bound(abfd);
- dynamic = TRUE;
- }
- if (storage < 0L)
- return bfd_error(bfd_get_filename(abfd));
- syms = malloc(storage);
- if (dynamic)
- symcount = bfd_canonicalize_dynamic_symtab(abfd, syms);
- else
- symcount = bfd_canonicalize_symtab(abfd, syms);
- if (symcount < 0) {
- free(syms);
- return bfd_error(bfd_get_filename(abfd));
- }
- a2l->syms = syms;
- return 0;
- }
- static void find_address_in_section(bfd *abfd, asection *section, void *data)
- {
- bfd_vma pc, vma;
- bfd_size_type size;
- struct a2l_data *a2l = data;
- flagword flags;
- if (a2l->found)
- return;
- #ifdef bfd_get_section_flags
- flags = bfd_get_section_flags(abfd, section);
- #else
- flags = bfd_section_flags(section);
- #endif
- if ((flags & SEC_ALLOC) == 0)
- return;
- pc = a2l->addr;
- #ifdef bfd_get_section_vma
- vma = bfd_get_section_vma(abfd, section);
- #else
- vma = bfd_section_vma(section);
- #endif
- #ifdef bfd_get_section_size
- size = bfd_get_section_size(section);
- #else
- size = bfd_section_size(section);
- #endif
- if (pc < vma || pc >= vma + size)
- return;
- a2l->found = bfd_find_nearest_line(abfd, section, a2l->syms, pc - vma,
- &a2l->filename, &a2l->funcname,
- &a2l->line);
- if (a2l->filename && !strlen(a2l->filename))
- a2l->filename = NULL;
- }
- static struct a2l_data *addr2line_init(const char *path)
- {
- bfd *abfd;
- struct a2l_data *a2l = NULL;
- abfd = bfd_openr(path, NULL);
- if (abfd == NULL)
- return NULL;
- if (!bfd_check_format(abfd, bfd_object))
- goto out;
- a2l = zalloc(sizeof(*a2l));
- if (a2l == NULL)
- goto out;
- a2l->abfd = abfd;
- a2l->input = strdup(path);
- if (a2l->input == NULL)
- goto out;
- if (slurp_symtab(abfd, a2l))
- goto out;
- return a2l;
- out:
- if (a2l) {
- zfree((char **)&a2l->input);
- free(a2l);
- }
- bfd_close(abfd);
- return NULL;
- }
- static void addr2line_cleanup(struct a2l_data *a2l)
- {
- if (a2l->abfd)
- bfd_close(a2l->abfd);
- zfree((char **)&a2l->input);
- zfree(&a2l->syms);
- free(a2l);
- }
- #define MAX_INLINE_NEST 1024
- static int inline_list__append_dso_a2l(struct dso *dso,
- struct inline_node *node,
- struct symbol *sym)
- {
- struct a2l_data *a2l = dso->a2l;
- struct symbol *inline_sym = new_inline_sym(dso, sym, a2l->funcname);
- char *srcline = NULL;
- if (a2l->filename)
- srcline = srcline_from_fileline(a2l->filename, a2l->line);
- return inline_list__append(inline_sym, srcline, node);
- }
- static int addr2line(const char *dso_name, u64 addr,
- char **file, unsigned int *line, struct dso *dso,
- bool unwind_inlines, struct inline_node *node,
- struct symbol *sym)
- {
- int ret = 0;
- struct a2l_data *a2l = dso->a2l;
- if (!a2l) {
- dso->a2l = addr2line_init(dso_name);
- a2l = dso->a2l;
- }
- if (a2l == NULL) {
- if (!symbol_conf.disable_add2line_warn)
- pr_warning("addr2line_init failed for %s\n", dso_name);
- return 0;
- }
- a2l->addr = addr;
- a2l->found = false;
- bfd_map_over_sections(a2l->abfd, find_address_in_section, a2l);
- if (!a2l->found)
- return 0;
- if (unwind_inlines) {
- int cnt = 0;
- if (node && inline_list__append_dso_a2l(dso, node, sym))
- return 0;
- while (bfd_find_inliner_info(a2l->abfd, &a2l->filename,
- &a2l->funcname, &a2l->line) &&
- cnt++ < MAX_INLINE_NEST) {
- if (a2l->filename && !strlen(a2l->filename))
- a2l->filename = NULL;
- if (node != NULL) {
- if (inline_list__append_dso_a2l(dso, node, sym))
- return 0;
- // found at least one inline frame
- ret = 1;
- }
- }
- }
- if (file) {
- *file = a2l->filename ? strdup(a2l->filename) : NULL;
- ret = *file ? 1 : 0;
- }
- if (line)
- *line = a2l->line;
- return ret;
- }
- void dso__free_a2l(struct dso *dso)
- {
- struct a2l_data *a2l = dso->a2l;
- if (!a2l)
- return;
- addr2line_cleanup(a2l);
- dso->a2l = NULL;
- }
- static struct inline_node *addr2inlines(const char *dso_name, u64 addr,
- struct dso *dso, struct symbol *sym)
- {
- struct inline_node *node;
- node = zalloc(sizeof(*node));
- if (node == NULL) {
- perror("not enough memory for the inline node");
- return NULL;
- }
- INIT_LIST_HEAD(&node->val);
- node->addr = addr;
- addr2line(dso_name, addr, NULL, NULL, dso, true, node, sym);
- return node;
- }
- #else /* HAVE_LIBBFD_SUPPORT */
- static int filename_split(char *filename, unsigned int *line_nr)
- {
- char *sep;
- sep = strchr(filename, '\n');
- if (sep)
- *sep = '\0';
- if (!strcmp(filename, "??:0"))
- return 0;
- sep = strchr(filename, ':');
- if (sep) {
- *sep++ = '\0';
- *line_nr = strtoul(sep, NULL, 0);
- return 1;
- }
- return 0;
- }
- static int addr2line(const char *dso_name, u64 addr,
- char **file, unsigned int *line_nr,
- struct dso *dso __maybe_unused,
- bool unwind_inlines __maybe_unused,
- struct inline_node *node __maybe_unused,
- struct symbol *sym __maybe_unused)
- {
- FILE *fp;
- char cmd[PATH_MAX];
- char *filename = NULL;
- size_t len;
- int ret = 0;
- scnprintf(cmd, sizeof(cmd), "addr2line -e %s %016"PRIx64,
- dso_name, addr);
- fp = popen(cmd, "r");
- if (fp == NULL) {
- pr_warning("popen failed for %s\n", dso_name);
- return 0;
- }
- if (getline(&filename, &len, fp) < 0 || !len) {
- pr_warning("addr2line has no output for %s\n", dso_name);
- goto out;
- }
- ret = filename_split(filename, line_nr);
- if (ret != 1) {
- free(filename);
- goto out;
- }
- *file = filename;
- out:
- pclose(fp);
- return ret;
- }
- void dso__free_a2l(struct dso *dso __maybe_unused)
- {
- }
- static struct inline_node *addr2inlines(const char *dso_name, u64 addr,
- struct dso *dso __maybe_unused,
- struct symbol *sym)
- {
- FILE *fp;
- char cmd[PATH_MAX];
- struct inline_node *node;
- char *filename = NULL;
- char *funcname = NULL;
- size_t filelen, funclen;
- unsigned int line_nr = 0;
- scnprintf(cmd, sizeof(cmd), "addr2line -e %s -i -f %016"PRIx64,
- dso_name, addr);
- fp = popen(cmd, "r");
- if (fp == NULL) {
- pr_err("popen failed for %s\n", dso_name);
- return NULL;
- }
- node = zalloc(sizeof(*node));
- if (node == NULL) {
- perror("not enough memory for the inline node");
- goto out;
- }
- INIT_LIST_HEAD(&node->val);
- node->addr = addr;
- /* addr2line -f generates two lines for each inlined functions */
- while (getline(&funcname, &funclen, fp) != -1) {
- char *srcline;
- struct symbol *inline_sym;
- strim(funcname);
- if (getline(&filename, &filelen, fp) == -1)
- goto out;
- if (filename_split(filename, &line_nr) != 1)
- goto out;
- srcline = srcline_from_fileline(filename, line_nr);
- inline_sym = new_inline_sym(dso, sym, funcname);
- if (inline_list__append(inline_sym, srcline, node) != 0) {
- free(srcline);
- if (inline_sym && inline_sym->inlined)
- symbol__delete(inline_sym);
- goto out;
- }
- }
- out:
- pclose(fp);
- free(filename);
- free(funcname);
- return node;
- }
- #endif /* HAVE_LIBBFD_SUPPORT */
- /*
- * Number of addr2line failures (without success) before disabling it for that
- * dso.
- */
- #define A2L_FAIL_LIMIT 123
- char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
- bool show_sym, bool show_addr, bool unwind_inlines,
- u64 ip)
- {
- char *file = NULL;
- unsigned line = 0;
- char *srcline;
- const char *dso_name;
- if (!dso->has_srcline)
- goto out;
- dso_name = dso__name(dso);
- if (dso_name == NULL)
- goto out;
- if (!addr2line(dso_name, addr, &file, &line, dso,
- unwind_inlines, NULL, sym))
- goto out;
- srcline = srcline_from_fileline(file, line);
- free(file);
- if (!srcline)
- goto out;
- dso->a2l_fails = 0;
- return srcline;
- out:
- if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
- dso->has_srcline = 0;
- dso__free_a2l(dso);
- }
- if (!show_addr)
- return (show_sym && sym) ?
- strndup(sym->name, sym->namelen) : NULL;
- if (sym) {
- if (asprintf(&srcline, "%s+%" PRIu64, show_sym ? sym->name : "",
- ip - sym->start) < 0)
- return SRCLINE_UNKNOWN;
- } else if (asprintf(&srcline, "%s[%" PRIx64 "]", dso->short_name, addr) < 0)
- return SRCLINE_UNKNOWN;
- return srcline;
- }
- /* Returns filename and fills in line number in line */
- char *get_srcline_split(struct dso *dso, u64 addr, unsigned *line)
- {
- char *file = NULL;
- const char *dso_name;
- if (!dso->has_srcline)
- goto out;
- dso_name = dso__name(dso);
- if (dso_name == NULL)
- goto out;
- if (!addr2line(dso_name, addr, &file, line, dso, true, NULL, NULL))
- goto out;
- dso->a2l_fails = 0;
- return file;
- out:
- if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
- dso->has_srcline = 0;
- dso__free_a2l(dso);
- }
- return NULL;
- }
- void free_srcline(char *srcline)
- {
- if (srcline && strcmp(srcline, SRCLINE_UNKNOWN) != 0)
- free(srcline);
- }
- char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
- bool show_sym, bool show_addr, u64 ip)
- {
- return __get_srcline(dso, addr, sym, show_sym, show_addr, false, ip);
- }
- struct srcline_node {
- u64 addr;
- char *srcline;
- struct rb_node rb_node;
- };
- void srcline__tree_insert(struct rb_root_cached *tree, u64 addr, char *srcline)
- {
- struct rb_node **p = &tree->rb_root.rb_node;
- struct rb_node *parent = NULL;
- struct srcline_node *i, *node;
- bool leftmost = true;
- node = zalloc(sizeof(struct srcline_node));
- if (!node) {
- perror("not enough memory for the srcline node");
- return;
- }
- node->addr = addr;
- node->srcline = srcline;
- while (*p != NULL) {
- parent = *p;
- i = rb_entry(parent, struct srcline_node, rb_node);
- if (addr < i->addr)
- p = &(*p)->rb_left;
- else {
- p = &(*p)->rb_right;
- leftmost = false;
- }
- }
- rb_link_node(&node->rb_node, parent, p);
- rb_insert_color_cached(&node->rb_node, tree, leftmost);
- }
- char *srcline__tree_find(struct rb_root_cached *tree, u64 addr)
- {
- struct rb_node *n = tree->rb_root.rb_node;
- while (n) {
- struct srcline_node *i = rb_entry(n, struct srcline_node,
- rb_node);
- if (addr < i->addr)
- n = n->rb_left;
- else if (addr > i->addr)
- n = n->rb_right;
- else
- return i->srcline;
- }
- return NULL;
- }
- void srcline__tree_delete(struct rb_root_cached *tree)
- {
- struct srcline_node *pos;
- struct rb_node *next = rb_first_cached(tree);
- while (next) {
- pos = rb_entry(next, struct srcline_node, rb_node);
- next = rb_next(&pos->rb_node);
- rb_erase_cached(&pos->rb_node, tree);
- free_srcline(pos->srcline);
- zfree(&pos);
- }
- }
- struct inline_node *dso__parse_addr_inlines(struct dso *dso, u64 addr,
- struct symbol *sym)
- {
- const char *dso_name;
- dso_name = dso__name(dso);
- if (dso_name == NULL)
- return NULL;
- return addr2inlines(dso_name, addr, dso, sym);
- }
- void inline_node__delete(struct inline_node *node)
- {
- struct inline_list *ilist, *tmp;
- list_for_each_entry_safe(ilist, tmp, &node->val, list) {
- list_del_init(&ilist->list);
- free_srcline(ilist->srcline);
- /* only the inlined symbols are owned by the list */
- if (ilist->symbol && ilist->symbol->inlined)
- symbol__delete(ilist->symbol);
- free(ilist);
- }
- free(node);
- }
- void inlines__tree_insert(struct rb_root_cached *tree,
- struct inline_node *inlines)
- {
- struct rb_node **p = &tree->rb_root.rb_node;
- struct rb_node *parent = NULL;
- const u64 addr = inlines->addr;
- struct inline_node *i;
- bool leftmost = true;
- while (*p != NULL) {
- parent = *p;
- i = rb_entry(parent, struct inline_node, rb_node);
- if (addr < i->addr)
- p = &(*p)->rb_left;
- else {
- p = &(*p)->rb_right;
- leftmost = false;
- }
- }
- rb_link_node(&inlines->rb_node, parent, p);
- rb_insert_color_cached(&inlines->rb_node, tree, leftmost);
- }
- struct inline_node *inlines__tree_find(struct rb_root_cached *tree, u64 addr)
- {
- struct rb_node *n = tree->rb_root.rb_node;
- while (n) {
- struct inline_node *i = rb_entry(n, struct inline_node,
- rb_node);
- if (addr < i->addr)
- n = n->rb_left;
- else if (addr > i->addr)
- n = n->rb_right;
- else
- return i;
- }
- return NULL;
- }
- void inlines__tree_delete(struct rb_root_cached *tree)
- {
- struct inline_node *pos;
- struct rb_node *next = rb_first_cached(tree);
- while (next) {
- pos = rb_entry(next, struct inline_node, rb_node);
- next = rb_next(&pos->rb_node);
- rb_erase_cached(&pos->rb_node, tree);
- inline_node__delete(pos);
- }
- }
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