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perf disassemble: Simplify logic for picking the filename to disassemble 

Lots of changes to support kcore, compressed modules, build-id files
left us with some spaguetti code, simplify it a bit, more to come.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-h70p7x451li3f2fhs44vzmm8@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2016-08-09 15:16:37 -03:00
parent c12944f7fa
commit 3caee094d1
1 changed files with 16 additions and 25 deletions
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41
tools/perf/util/annotate.c
View File

@ -1166,7 +1166,6 @@ int symbol__disassemble(struct symbol *sym, struct map *map, size_t privsize)
{ {
struct dso *dso = map->dso; struct dso *dso = map->dso;
char *filename; char *filename;
bool free_filename = true;
char command[PATH_MAX * 2]; char command[PATH_MAX * 2];
FILE *file; FILE *file;
char symfs_filename[PATH_MAX]; char symfs_filename[PATH_MAX];
@ -1183,31 +1182,30 @@ int symbol__disassemble(struct symbol *sym, struct map *map, size_t privsize)
goto out; goto out;
filename = dso__build_id_filename(dso, NULL, 0); filename = dso__build_id_filename(dso, NULL, 0);
if (filename) if (filename) {
symbol__join_symfs(symfs_filename, filename); symbol__join_symfs(symfs_filename, filename);
free(filename);
if (filename == NULL) { } else {
if (dso->has_build_id) if (dso->has_build_id)
return ENOMEM; return ENOMEM;
goto fallback; goto fallback;
} else if (dso__is_kcore(dso) || }
readlink(symfs_filename, command, sizeof(command)) < 0 ||
strstr(command, DSO__NAME_KALLSYMS) || if (dso__is_kcore(dso) ||
access(symfs_filename, R_OK)) { readlink(symfs_filename, command, sizeof(command)) < 0 ||
free(filename); strstr(command, DSO__NAME_KALLSYMS) ||
access(symfs_filename, R_OK)) {
fallback: fallback:
/* /*
* If we don't have build-ids or the build-id file isn't in the * 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 * cache, or is just a kallsyms file, well, lets hope that this
* DSO is the same as when 'perf record' ran. * DSO is the same as when 'perf record' ran.
*/ */
filename = (char *)dso->long_name; symbol__join_symfs(symfs_filename, dso->long_name);
symbol__join_symfs(symfs_filename, filename);
free_filename = false;
} }
pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__, pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
filename, sym->name, map->unmap_ip(map, sym->start), symfs_filename, sym->name, map->unmap_ip(map, sym->start),
map->unmap_ip(map, sym->end)); map->unmap_ip(map, sym->end));
pr_debug("annotating [%p] %30s : [%p] %30s\n", pr_debug("annotating [%p] %30s : [%p] %30s\n",
@ -1222,11 +1220,6 @@ fallback:
delete_extract = true; delete_extract = true;
strlcpy(symfs_filename, kce.extract_filename, strlcpy(symfs_filename, kce.extract_filename,
sizeof(symfs_filename)); sizeof(symfs_filename));
if (free_filename) {
free(filename);
free_filename = false;
}
filename = symfs_filename;
} }
} else if (dso__needs_decompress(dso)) { } else if (dso__needs_decompress(dso)) {
char tmp[PATH_MAX]; char tmp[PATH_MAX];
@ -1235,14 +1228,14 @@ fallback:
bool ret; bool ret;
if (kmod_path__parse_ext(&m, symfs_filename)) if (kmod_path__parse_ext(&m, symfs_filename))
goto out_free_filename; goto out;
snprintf(tmp, PATH_MAX, "/tmp/perf-kmod-XXXXXX"); snprintf(tmp, PATH_MAX, "/tmp/perf-kmod-XXXXXX");
fd = mkstemp(tmp); fd = mkstemp(tmp);
if (fd < 0) { if (fd < 0) {
free(m.ext); free(m.ext);
goto out_free_filename; goto out;
} }
ret = decompress_to_file(m.ext, symfs_filename, fd); ret = decompress_to_file(m.ext, symfs_filename, fd);
@ -1254,7 +1247,7 @@ fallback:
close(fd); close(fd);
if (!ret) if (!ret)
goto out_free_filename; goto out;
strcpy(symfs_filename, tmp); strcpy(symfs_filename, tmp);
} }
@ -1270,7 +1263,7 @@ fallback:
map__rip_2objdump(map, sym->end), map__rip_2objdump(map, sym->end),
symbol_conf.annotate_asm_raw ? "" : "--no-show-raw", symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
symbol_conf.annotate_src ? "-S" : "", symbol_conf.annotate_src ? "-S" : "",
symfs_filename, filename); symfs_filename, symfs_filename);
pr_debug("Executing: %s\n", command); pr_debug("Executing: %s\n", command);
@ -1332,11 +1325,9 @@ out_remove_tmp:
if (dso__needs_decompress(dso)) if (dso__needs_decompress(dso))
unlink(symfs_filename); unlink(symfs_filename);
out_free_filename:
if (delete_extract) if (delete_extract)
kcore_extract__delete(&kce); kcore_extract__delete(&kce);
if (free_filename)
free(filename);
out: out:
return err; return err;