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Diffstat (limited to 'tools/perf/util/build-id.c')
-rw-r--r--tools/perf/util/build-id.c209
1 files changed, 149 insertions, 60 deletions
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 0c72680a977f..61867dff5d5a 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -59,11 +59,8 @@ static int perf_event__exit_del_thread(struct perf_tool *tool __maybe_unused,
dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
event->fork.ppid, event->fork.ptid);
- if (thread) {
- rb_erase(&thread->rb_node, &machine->threads);
- machine->last_match = NULL;
- thread__delete(thread);
- }
+ if (thread)
+ machine__remove_thread(machine, thread);
return 0;
}
@@ -93,6 +90,35 @@ int build_id__sprintf(const u8 *build_id, int len, char *bf)
return raw - build_id;
}
+/* asnprintf consolidates asprintf and snprintf */
+static int asnprintf(char **strp, size_t size, const char *fmt, ...)
+{
+ va_list ap;
+ int ret;
+
+ if (!strp)
+ return -EINVAL;
+
+ va_start(ap, fmt);
+ if (*strp)
+ ret = vsnprintf(*strp, size, fmt, ap);
+ else
+ ret = vasprintf(strp, fmt, ap);
+ va_end(ap);
+
+ return ret;
+}
+
+static char *build_id__filename(const char *sbuild_id, char *bf, size_t size)
+{
+ char *tmp = bf;
+ int ret = asnprintf(&bf, size, "%s/.build-id/%.2s/%s", buildid_dir,
+ sbuild_id, sbuild_id + 2);
+ if (ret < 0 || (tmp && size < (unsigned int)ret))
+ return NULL;
+ return bf;
+}
+
char *dso__build_id_filename(const struct dso *dso, char *bf, size_t size)
{
char build_id_hex[BUILD_ID_SIZE * 2 + 1];
@@ -101,14 +127,7 @@ char *dso__build_id_filename(const struct dso *dso, char *bf, size_t size)
return NULL;
build_id__sprintf(dso->build_id, sizeof(dso->build_id), build_id_hex);
- if (bf == NULL) {
- if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir,
- build_id_hex, build_id_hex + 2) < 0)
- return NULL;
- } else
- snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir,
- build_id_hex, build_id_hex + 2);
- return bf;
+ return build_id__filename(build_id_hex, bf, size);
}
#define dsos__for_each_with_build_id(pos, head) \
@@ -259,52 +278,113 @@ void disable_buildid_cache(void)
no_buildid_cache = true;
}
-int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
- const char *name, bool is_kallsyms, bool is_vdso)
+static char *build_id_cache__dirname_from_path(const char *name,
+ bool is_kallsyms, bool is_vdso)
{
- const size_t size = PATH_MAX;
- char *realname, *filename = zalloc(size),
- *linkname = zalloc(size), *targetname;
- int len, err = -1;
+ char *realname = (char *)name, *filename;
bool slash = is_kallsyms || is_vdso;
- if (is_kallsyms) {
- if (symbol_conf.kptr_restrict) {
- pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
- err = 0;
- goto out_free;
- }
- realname = (char *) name;
- } else
+ if (!slash) {
realname = realpath(name, NULL);
+ if (!realname)
+ return NULL;
+ }
- if (realname == NULL || filename == NULL || linkname == NULL)
+ if (asprintf(&filename, "%s%s%s", buildid_dir, slash ? "/" : "",
+ is_vdso ? DSO__NAME_VDSO : realname) < 0)
+ filename = NULL;
+
+ if (!slash)
+ free(realname);
+
+ return filename;
+}
+
+int build_id_cache__list_build_ids(const char *pathname,
+ struct strlist **result)
+{
+ struct strlist *list;
+ char *dir_name;
+ DIR *dir;
+ struct dirent *d;
+ int ret = 0;
+
+ list = strlist__new(true, NULL);
+ dir_name = build_id_cache__dirname_from_path(pathname, false, false);
+ if (!list || !dir_name) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ /* List up all dirents */
+ dir = opendir(dir_name);
+ if (!dir) {
+ ret = -errno;
+ goto out;
+ }
+
+ while ((d = readdir(dir)) != NULL) {
+ if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+ continue;
+ strlist__add(list, d->d_name);
+ }
+ closedir(dir);
+
+out:
+ free(dir_name);
+ if (ret)
+ strlist__delete(list);
+ else
+ *result = list;
+
+ return ret;
+}
+
+int build_id_cache__add_s(const char *sbuild_id, const char *name,
+ bool is_kallsyms, bool is_vdso)
+{
+ const size_t size = PATH_MAX;
+ char *realname = NULL, *filename = NULL, *dir_name = NULL,
+ *linkname = zalloc(size), *targetname, *tmp;
+ int err = -1;
+
+ if (!is_kallsyms) {
+ realname = realpath(name, NULL);
+ if (!realname)
+ goto out_free;
+ }
+
+ dir_name = build_id_cache__dirname_from_path(name, is_kallsyms, is_vdso);
+ if (!dir_name)
goto out_free;
- len = scnprintf(filename, size, "%s%s%s",
- debugdir, slash ? "/" : "",
- is_vdso ? DSO__NAME_VDSO : realname);
- if (mkdir_p(filename, 0755))
+ if (mkdir_p(dir_name, 0755))
goto out_free;
- snprintf(filename + len, size - len, "/%s", sbuild_id);
+ if (asprintf(&filename, "%s/%s", dir_name, sbuild_id) < 0) {
+ filename = NULL;
+ goto out_free;
+ }
if (access(filename, F_OK)) {
if (is_kallsyms) {
if (copyfile("/proc/kallsyms", filename))
goto out_free;
- } else if (link(realname, filename) && copyfile(name, filename))
+ } else if (link(realname, filename) && errno != EEXIST &&
+ copyfile(name, filename))
goto out_free;
}
- len = scnprintf(linkname, size, "%s/.build-id/%.2s",
- debugdir, sbuild_id);
+ if (!build_id__filename(sbuild_id, linkname, size))
+ goto out_free;
+ tmp = strrchr(linkname, '/');
+ *tmp = '\0';
if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
goto out_free;
- snprintf(linkname + len, size - len, "/%s", sbuild_id + 2);
- targetname = filename + strlen(debugdir) - 5;
+ *tmp = '/';
+ targetname = filename + strlen(buildid_dir) - 5;
memcpy(targetname, "../..", 5);
if (symlink(targetname, linkname) == 0)
@@ -313,34 +393,46 @@ out_free:
if (!is_kallsyms)
free(realname);
free(filename);
+ free(dir_name);
free(linkname);
return err;
}
static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
- const char *name, const char *debugdir,
- bool is_kallsyms, bool is_vdso)
+ const char *name, bool is_kallsyms,
+ bool is_vdso)
{
char sbuild_id[BUILD_ID_SIZE * 2 + 1];
build_id__sprintf(build_id, build_id_size, sbuild_id);
- return build_id_cache__add_s(sbuild_id, debugdir, name,
- is_kallsyms, is_vdso);
+ return build_id_cache__add_s(sbuild_id, name, is_kallsyms, is_vdso);
+}
+
+bool build_id_cache__cached(const char *sbuild_id)
+{
+ bool ret = false;
+ char *filename = build_id__filename(sbuild_id, NULL, 0);
+
+ if (filename && !access(filename, F_OK))
+ ret = true;
+ free(filename);
+
+ return ret;
}
-int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
+int build_id_cache__remove_s(const char *sbuild_id)
{
const size_t size = PATH_MAX;
char *filename = zalloc(size),
- *linkname = zalloc(size);
+ *linkname = zalloc(size), *tmp;
int err = -1;
if (filename == NULL || linkname == NULL)
goto out_free;
- snprintf(linkname, size, "%s/.build-id/%.2s/%s",
- debugdir, sbuild_id, sbuild_id + 2);
+ if (!build_id__filename(sbuild_id, linkname, size))
+ goto out_free;
if (access(linkname, F_OK))
goto out_free;
@@ -354,8 +446,8 @@ int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
/*
* Since the link is relative, we must make it absolute:
*/
- snprintf(linkname, size, "%s/.build-id/%.2s/%s",
- debugdir, sbuild_id, filename);
+ tmp = strrchr(linkname, '/') + 1;
+ snprintf(tmp, size - (tmp - linkname), "%s", filename);
if (unlink(linkname))
goto out_free;
@@ -367,8 +459,7 @@ out_free:
return err;
}
-static int dso__cache_build_id(struct dso *dso, struct machine *machine,
- const char *debugdir)
+static int dso__cache_build_id(struct dso *dso, struct machine *machine)
{
bool is_kallsyms = dso->kernel && dso->long_name[0] != '/';
bool is_vdso = dso__is_vdso(dso);
@@ -381,28 +472,26 @@ static int dso__cache_build_id(struct dso *dso, struct machine *machine,
name = nm;
}
return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id), name,
- debugdir, is_kallsyms, is_vdso);
+ is_kallsyms, is_vdso);
}
static int __dsos__cache_build_ids(struct list_head *head,
- struct machine *machine, const char *debugdir)
+ struct machine *machine)
{
struct dso *pos;
int err = 0;
dsos__for_each_with_build_id(pos, head)
- if (dso__cache_build_id(pos, machine, debugdir))
+ if (dso__cache_build_id(pos, machine))
err = -1;
return err;
}
-static int machine__cache_build_ids(struct machine *machine, const char *debugdir)
+static int machine__cache_build_ids(struct machine *machine)
{
- int ret = __dsos__cache_build_ids(&machine->kernel_dsos.head, machine,
- debugdir);
- ret |= __dsos__cache_build_ids(&machine->user_dsos.head, machine,
- debugdir);
+ int ret = __dsos__cache_build_ids(&machine->kernel_dsos.head, machine);
+ ret |= __dsos__cache_build_ids(&machine->user_dsos.head, machine);
return ret;
}
@@ -417,11 +506,11 @@ int perf_session__cache_build_ids(struct perf_session *session)
if (mkdir(buildid_dir, 0755) != 0 && errno != EEXIST)
return -1;
- ret = machine__cache_build_ids(&session->machines.host, buildid_dir);
+ ret = machine__cache_build_ids(&session->machines.host);
for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
struct machine *pos = rb_entry(nd, struct machine, rb_node);
- ret |= machine__cache_build_ids(pos, buildid_dir);
+ ret |= machine__cache_build_ids(pos);
}
return ret ? -1 : 0;
}