diff options
Diffstat (limited to 'tools/perf/util/srcline.c')
| -rw-r--r-- | tools/perf/util/srcline.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c deleted file mode 100644 index d11aefb..0000000 --- a/tools/perf/util/srcline.c +++ /dev/null @@ -1,265 +0,0 @@ -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include <linux/kernel.h> - -#include "util/dso.h" -#include "util/util.h" -#include "util/debug.h" - -#ifdef HAVE_LIBBFD_SUPPORT - -/* - * Implement addr2line using libbfd. - */ -#define PACKAGE "perf" -#include <bfd.h> - -struct a2l_data { - const char *input; - unsigned long 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; - - if (a2l->found) - return; - - if ((bfd_get_section_flags(abfd, section) & SEC_ALLOC) == 0) - return; - - pc = a2l->addr; - vma = bfd_get_section_vma(abfd, section); - size = bfd_get_section_size(section); - - 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); -} - -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) { - free((void *)a2l->input); - free(a2l); - } - bfd_close(abfd); - return NULL; -} - -static void addr2line_cleanup(struct a2l_data *a2l) -{ - if (a2l->abfd) - bfd_close(a2l->abfd); - free((void *)a2l->input); - free(a2l->syms); - free(a2l); -} - -static int addr2line(const char *dso_name, unsigned long addr, - char **file, unsigned int *line) -{ - int ret = 0; - struct a2l_data *a2l; - - a2l = addr2line_init(dso_name); - if (a2l == NULL) { - pr_warning("addr2line_init failed for %s\n", dso_name); - return 0; - } - - a2l->addr = addr; - bfd_map_over_sections(a2l->abfd, find_address_in_section, a2l); - - if (a2l->found && a2l->filename) { - *file = strdup(a2l->filename); - *line = a2l->line; - - if (*file) - ret = 1; - } - - addr2line_cleanup(a2l); - return ret; -} - -#else /* HAVE_LIBBFD_SUPPORT */ - -static int addr2line(const char *dso_name, unsigned long addr, - char **file, unsigned int *line_nr) -{ - FILE *fp; - char cmd[PATH_MAX]; - char *filename = NULL; - size_t len; - char *sep; - 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; - } - - sep = strchr(filename, '\n'); - if (sep) - *sep = '\0'; - - if (!strcmp(filename, "??:0")) { - pr_debug("no debugging info in %s\n", dso_name); - free(filename); - goto out; - } - - sep = strchr(filename, ':'); - if (sep) { - *sep++ = '\0'; - *file = filename; - *line_nr = strtoul(sep, NULL, 0); - ret = 1; - } -out: - pclose(fp); - return ret; -} -#endif /* HAVE_LIBBFD_SUPPORT */ - -char *get_srcline(struct dso *dso, unsigned long addr) -{ - char *file = NULL; - unsigned line = 0; - char *srcline; - char *dso_name = dso->long_name; - size_t size; - - if (!dso->has_srcline) - return SRCLINE_UNKNOWN; - - if (dso_name[0] == '[') - goto out; - - if (!strncmp(dso_name, "/tmp/perf-", 10)) - goto out; - - if (!addr2line(dso_name, addr, &file, &line)) - goto out; - - /* just calculate actual length */ - size = snprintf(NULL, 0, "%s:%u", file, line) + 1; - - srcline = malloc(size); - if (srcline) - snprintf(srcline, size, "%s:%u", file, line); - else - srcline = SRCLINE_UNKNOWN; - - free(file); - return srcline; - -out: - dso->has_srcline = 0; - return SRCLINE_UNKNOWN; -} - -void free_srcline(char *srcline) -{ - if (srcline && strcmp(srcline, SRCLINE_UNKNOWN) != 0) - free(srcline); -} |