5 #include <linux/kernel.h>
9 #include "util/debug.h"
13 #ifdef HAVE_LIBBFD_SUPPORT
16 * Implement addr2line using libbfd.
18 #define PACKAGE "perf"
34 static int bfd_error(const char *string)
38 errmsg = bfd_errmsg(bfd_get_error());
42 pr_debug("%s: %s\n", string, errmsg);
44 pr_debug("%s\n", errmsg);
49 static int slurp_symtab(bfd *abfd, struct a2l_data *a2l)
54 bfd_boolean dynamic = FALSE;
56 if ((bfd_get_file_flags(abfd) & HAS_SYMS) == 0)
57 return bfd_error(bfd_get_filename(abfd));
59 storage = bfd_get_symtab_upper_bound(abfd);
61 storage = bfd_get_dynamic_symtab_upper_bound(abfd);
65 return bfd_error(bfd_get_filename(abfd));
67 syms = malloc(storage);
69 symcount = bfd_canonicalize_dynamic_symtab(abfd, syms);
71 symcount = bfd_canonicalize_symtab(abfd, syms);
75 return bfd_error(bfd_get_filename(abfd));
82 static void find_address_in_section(bfd *abfd, asection *section, void *data)
86 struct a2l_data *a2l = data;
91 if ((bfd_get_section_flags(abfd, section) & SEC_ALLOC) == 0)
95 vma = bfd_get_section_vma(abfd, section);
96 size = bfd_get_section_size(section);
98 if (pc < vma || pc >= vma + size)
101 a2l->found = bfd_find_nearest_line(abfd, section, a2l->syms, pc - vma,
102 &a2l->filename, &a2l->funcname,
106 static struct a2l_data *addr2line_init(const char *path)
109 struct a2l_data *a2l = NULL;
111 abfd = bfd_openr(path, NULL);
115 if (!bfd_check_format(abfd, bfd_object))
118 a2l = zalloc(sizeof(*a2l));
123 a2l->input = strdup(path);
124 if (a2l->input == NULL)
127 if (slurp_symtab(abfd, a2l))
134 zfree((char **)&a2l->input);
141 static void addr2line_cleanup(struct a2l_data *a2l)
144 bfd_close(a2l->abfd);
145 zfree((char **)&a2l->input);
150 static int addr2line(const char *dso_name, u64 addr,
151 char **file, unsigned int *line, struct dso *dso)
154 struct a2l_data *a2l = dso->a2l;
157 dso->a2l = addr2line_init(dso_name);
162 pr_warning("addr2line_init failed for %s\n", dso_name);
169 bfd_map_over_sections(a2l->abfd, find_address_in_section, a2l);
171 if (a2l->found && a2l->filename) {
172 *file = strdup(a2l->filename);
182 void dso__free_a2l(struct dso *dso)
184 struct a2l_data *a2l = dso->a2l;
189 addr2line_cleanup(a2l);
194 #else /* HAVE_LIBBFD_SUPPORT */
196 static int addr2line(const char *dso_name, u64 addr,
197 char **file, unsigned int *line_nr,
198 struct dso *dso __maybe_unused)
202 char *filename = NULL;
207 scnprintf(cmd, sizeof(cmd), "addr2line -e %s %016"PRIx64,
210 fp = popen(cmd, "r");
212 pr_warning("popen failed for %s\n", dso_name);
216 if (getline(&filename, &len, fp) < 0 || !len) {
217 pr_warning("addr2line has no output for %s\n", dso_name);
221 sep = strchr(filename, '\n');
225 if (!strcmp(filename, "??:0")) {
226 pr_debug("no debugging info in %s\n", dso_name);
231 sep = strchr(filename, ':');
235 *line_nr = strtoul(sep, NULL, 0);
243 void dso__free_a2l(struct dso *dso __maybe_unused)
247 #endif /* HAVE_LIBBFD_SUPPORT */
250 * Number of addr2line failures (without success) before disabling it for that
253 #define A2L_FAIL_LIMIT 123
255 char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
261 const char *dso_name;
263 if (!dso->has_srcline)
266 if (dso->symsrc_filename)
267 dso_name = dso->symsrc_filename;
269 dso_name = dso->long_name;
271 if (dso_name[0] == '[')
274 if (!strncmp(dso_name, "/tmp/perf-", 10))
277 if (!addr2line(dso_name, addr, &file, &line, dso))
280 if (asprintf(&srcline, "%s:%u", basename(file), line) < 0) {
291 if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
292 dso->has_srcline = 0;
296 if (asprintf(&srcline, "%s+%" PRIu64, show_sym ? sym->name : "",
297 addr - sym->start) < 0)
298 return SRCLINE_UNKNOWN;
299 } else if (asprintf(&srcline, "%s[%" PRIx64 "]", dso->short_name, addr) < 0)
300 return SRCLINE_UNKNOWN;
304 void free_srcline(char *srcline)
306 if (srcline && strcmp(srcline, SRCLINE_UNKNOWN) != 0)