5 #include <linux/kernel.h>
9 #include "util/debug.h"
11 #ifdef HAVE_LIBBFD_SUPPORT
14 * Implement addr2line using libbfd.
16 #define PACKAGE "perf"
32 static int bfd_error(const char *string)
36 errmsg = bfd_errmsg(bfd_get_error());
40 pr_debug("%s: %s\n", string, errmsg);
42 pr_debug("%s\n", errmsg);
47 static int slurp_symtab(bfd *abfd, struct a2l_data *a2l)
52 bfd_boolean dynamic = FALSE;
54 if ((bfd_get_file_flags(abfd) & HAS_SYMS) == 0)
55 return bfd_error(bfd_get_filename(abfd));
57 storage = bfd_get_symtab_upper_bound(abfd);
59 storage = bfd_get_dynamic_symtab_upper_bound(abfd);
63 return bfd_error(bfd_get_filename(abfd));
65 syms = malloc(storage);
67 symcount = bfd_canonicalize_dynamic_symtab(abfd, syms);
69 symcount = bfd_canonicalize_symtab(abfd, syms);
73 return bfd_error(bfd_get_filename(abfd));
80 static void find_address_in_section(bfd *abfd, asection *section, void *data)
84 struct a2l_data *a2l = data;
89 if ((bfd_get_section_flags(abfd, section) & SEC_ALLOC) == 0)
93 vma = bfd_get_section_vma(abfd, section);
94 size = bfd_get_section_size(section);
96 if (pc < vma || pc >= vma + size)
99 a2l->found = bfd_find_nearest_line(abfd, section, a2l->syms, pc - vma,
100 &a2l->filename, &a2l->funcname,
104 static struct a2l_data *addr2line_init(const char *path)
107 struct a2l_data *a2l = NULL;
109 abfd = bfd_openr(path, NULL);
113 if (!bfd_check_format(abfd, bfd_object))
116 a2l = zalloc(sizeof(*a2l));
121 a2l->input = strdup(path);
122 if (a2l->input == NULL)
125 if (slurp_symtab(abfd, a2l))
132 free((void *)a2l->input);
139 static void addr2line_cleanup(struct a2l_data *a2l)
142 bfd_close(a2l->abfd);
143 free((void *)a2l->input);
148 static int addr2line(const char *dso_name, unsigned long addr,
149 char **file, unsigned int *line)
152 struct a2l_data *a2l;
154 a2l = addr2line_init(dso_name);
156 pr_warning("addr2line_init failed for %s\n", dso_name);
161 bfd_map_over_sections(a2l->abfd, find_address_in_section, a2l);
163 if (a2l->found && a2l->filename) {
164 *file = strdup(a2l->filename);
171 addr2line_cleanup(a2l);
175 #else /* HAVE_LIBBFD_SUPPORT */
177 static int addr2line(const char *dso_name, unsigned long addr,
178 char **file, unsigned int *line_nr)
182 char *filename = NULL;
187 scnprintf(cmd, sizeof(cmd), "addr2line -e %s %016"PRIx64,
190 fp = popen(cmd, "r");
192 pr_warning("popen failed for %s\n", dso_name);
196 if (getline(&filename, &len, fp) < 0 || !len) {
197 pr_warning("addr2line has no output for %s\n", dso_name);
201 sep = strchr(filename, '\n');
205 if (!strcmp(filename, "??:0")) {
206 pr_debug("no debugging info in %s\n", dso_name);
211 sep = strchr(filename, ':');
215 *line_nr = strtoul(sep, NULL, 0);
222 #endif /* HAVE_LIBBFD_SUPPORT */
224 char *get_srcline(struct dso *dso, unsigned long addr)
229 char *dso_name = dso->long_name;
231 if (!dso->has_srcline)
232 return SRCLINE_UNKNOWN;
234 if (dso_name[0] == '[')
237 if (!strncmp(dso_name, "/tmp/perf-", 10))
240 if (!addr2line(dso_name, addr, &file, &line))
243 if (asprintf(&srcline, "%s:%u", file, line) < 0)
244 srcline = SRCLINE_UNKNOWN;
250 dso->has_srcline = 0;
251 return SRCLINE_UNKNOWN;
254 void free_srcline(char *srcline)
256 if (srcline && strcmp(srcline, SRCLINE_UNKNOWN) != 0)