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authorNamhyung Kim <namhyung@kernel.org>2014-11-04 10:14:30 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-11-05 10:14:07 -0300
commite195fac8077f034b0160bf420bdf450ae476701d (patch)
tree8bc86ad75813040279138fffdf6f0f663ad86511 /tools/perf/util/header.c
parent714c9c4a98f722115e10d021ea80600f4427b71e (diff)
downloadlinux-e195fac8077f034b0160bf420bdf450ae476701d.tar.bz2
perf build-id: Move build-id related functions to util/build-id.c
It'd be better managing those functions in a separate place as util/header.c file is already big. It now exports following 3 functions to others: bool perf_session__read_build_ids(struct perf_session *session, bool with_hits); int perf_session__write_buildid_table(struct perf_session *session, int fd); int perf_session__cache_build_ids(struct perf_session *session); Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: http://lkml.kernel.org/r/545733E7.6010105@intel.com Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1415063674-17206-5-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/header.c')
-rw-r--r--tools/perf/util/header.c337
1 files changed, 1 insertions, 336 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index be8d02eb97e9..3e2c156d9c64 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -79,10 +79,7 @@ static int do_write(int fd, const void *buf, size_t size)
return 0;
}
-#define NAME_ALIGN 64
-
-static int write_padded(int fd, const void *bf, size_t count,
- size_t count_aligned)
+int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
{
static const char zero_buf[NAME_ALIGN];
int err = do_write(fd, bf, count);
@@ -171,338 +168,6 @@ perf_header__set_cmdline(int argc, const char **argv)
return 0;
}
-#define dsos__for_each_with_build_id(pos, head) \
- list_for_each_entry(pos, head, node) \
- if (!pos->has_build_id) \
- continue; \
- else
-
-static int write_buildid(const char *name, size_t name_len, u8 *build_id,
- pid_t pid, u16 misc, int fd)
-{
- int err;
- struct build_id_event b;
- size_t len;
-
- len = name_len + 1;
- len = PERF_ALIGN(len, NAME_ALIGN);
-
- memset(&b, 0, sizeof(b));
- memcpy(&b.build_id, build_id, BUILD_ID_SIZE);
- b.pid = pid;
- b.header.misc = misc;
- b.header.size = sizeof(b) + len;
-
- err = do_write(fd, &b, sizeof(b));
- if (err < 0)
- return err;
-
- return write_padded(fd, name, name_len + 1, len);
-}
-
-static int __dsos__hit_all(struct list_head *head)
-{
- struct dso *pos;
-
- list_for_each_entry(pos, head, node)
- pos->hit = true;
-
- return 0;
-}
-
-static int machine__hit_all_dsos(struct machine *machine)
-{
- int err;
-
- err = __dsos__hit_all(&machine->kernel_dsos.head);
- if (err)
- return err;
-
- return __dsos__hit_all(&machine->user_dsos.head);
-}
-
-int dsos__hit_all(struct perf_session *session)
-{
- struct rb_node *nd;
- int err;
-
- err = machine__hit_all_dsos(&session->machines.host);
- if (err)
- return err;
-
- for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
- struct machine *pos = rb_entry(nd, struct machine, rb_node);
-
- err = machine__hit_all_dsos(pos);
- if (err)
- return err;
- }
-
- return 0;
-}
-
-static int __dsos__write_buildid_table(struct list_head *head,
- struct machine *machine,
- pid_t pid, u16 misc, int fd)
-{
- char nm[PATH_MAX];
- struct dso *pos;
-
- dsos__for_each_with_build_id(pos, head) {
- int err;
- const char *name;
- size_t name_len;
-
- if (!pos->hit)
- continue;
-
- if (dso__is_vdso(pos)) {
- name = pos->short_name;
- name_len = pos->short_name_len + 1;
- } else if (dso__is_kcore(pos)) {
- machine__mmap_name(machine, nm, sizeof(nm));
- name = nm;
- name_len = strlen(nm) + 1;
- } else {
- name = pos->long_name;
- name_len = pos->long_name_len + 1;
- }
-
- err = write_buildid(name, name_len, pos->build_id,
- pid, misc, fd);
- if (err)
- return err;
- }
-
- return 0;
-}
-
-static int machine__write_buildid_table(struct machine *machine, int fd)
-{
- int err;
- u16 kmisc = PERF_RECORD_MISC_KERNEL,
- umisc = PERF_RECORD_MISC_USER;
-
- if (!machine__is_host(machine)) {
- kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
- umisc = PERF_RECORD_MISC_GUEST_USER;
- }
-
- err = __dsos__write_buildid_table(&machine->kernel_dsos.head, machine,
- machine->pid, kmisc, fd);
- if (err == 0)
- err = __dsos__write_buildid_table(&machine->user_dsos.head,
- machine, machine->pid, umisc,
- fd);
- return err;
-}
-
-static int perf_session__write_buildid_table(struct perf_session *session, int fd)
-{
- struct rb_node *nd;
- int err = machine__write_buildid_table(&session->machines.host, fd);
-
- if (err)
- return err;
-
- for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
- struct machine *pos = rb_entry(nd, struct machine, rb_node);
- err = machine__write_buildid_table(pos, fd);
- if (err)
- break;
- }
- return err;
-}
-
-int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
- 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;
- 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
- realname = realpath(name, NULL);
-
- if (realname == NULL || filename == NULL || linkname == NULL)
- goto out_free;
-
- len = scnprintf(filename, size, "%s%s%s",
- debugdir, slash ? "/" : "",
- is_vdso ? DSO__NAME_VDSO : realname);
- if (mkdir_p(filename, 0755))
- goto out_free;
-
- snprintf(filename + len, size - len, "/%s", sbuild_id);
-
- if (access(filename, F_OK)) {
- if (is_kallsyms) {
- if (copyfile("/proc/kallsyms", filename))
- goto out_free;
- } else if (link(realname, filename) && copyfile(name, filename))
- goto out_free;
- }
-
- len = scnprintf(linkname, size, "%s/.build-id/%.2s",
- debugdir, sbuild_id);
-
- 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;
- memcpy(targetname, "../..", 5);
-
- if (symlink(targetname, linkname) == 0)
- err = 0;
-out_free:
- if (!is_kallsyms)
- free(realname);
- free(filename);
- 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)
-{
- 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);
-}
-
-int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
-{
- const size_t size = PATH_MAX;
- char *filename = zalloc(size),
- *linkname = zalloc(size);
- 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 (access(linkname, F_OK))
- goto out_free;
-
- if (readlink(linkname, filename, size - 1) < 0)
- goto out_free;
-
- if (unlink(linkname))
- goto out_free;
-
- /*
- * Since the link is relative, we must make it absolute:
- */
- snprintf(linkname, size, "%s/.build-id/%.2s/%s",
- debugdir, sbuild_id, filename);
-
- if (unlink(linkname))
- goto out_free;
-
- err = 0;
-out_free:
- free(filename);
- free(linkname);
- return err;
-}
-
-static int dso__cache_build_id(struct dso *dso, struct machine *machine,
- const char *debugdir)
-{
- bool is_kallsyms = dso->kernel && dso->long_name[0] != '/';
- bool is_vdso = dso__is_vdso(dso);
- const char *name = dso->long_name;
- char nm[PATH_MAX];
-
- if (dso__is_kcore(dso)) {
- is_kallsyms = true;
- machine__mmap_name(machine, nm, sizeof(nm));
- name = nm;
- }
- return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id), name,
- debugdir, is_kallsyms, is_vdso);
-}
-
-static int __dsos__cache_build_ids(struct list_head *head,
- struct machine *machine, const char *debugdir)
-{
- struct dso *pos;
- int err = 0;
-
- dsos__for_each_with_build_id(pos, head)
- if (dso__cache_build_id(pos, machine, debugdir))
- err = -1;
-
- return err;
-}
-
-static int machine__cache_build_ids(struct machine *machine, const char *debugdir)
-{
- int ret = __dsos__cache_build_ids(&machine->kernel_dsos.head, machine,
- debugdir);
- ret |= __dsos__cache_build_ids(&machine->user_dsos.head, machine,
- debugdir);
- return ret;
-}
-
-static int perf_session__cache_build_ids(struct perf_session *session)
-{
- struct rb_node *nd;
- int ret;
- char debugdir[PATH_MAX];
-
- snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
-
- if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
- return -1;
-
- ret = machine__cache_build_ids(&session->machines.host, debugdir);
-
- 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, debugdir);
- }
- return ret ? -1 : 0;
-}
-
-static bool machine__read_build_ids(struct machine *machine, bool with_hits)
-{
- bool ret;
-
- ret = __dsos__read_build_ids(&machine->kernel_dsos.head, with_hits);
- ret |= __dsos__read_build_ids(&machine->user_dsos.head, with_hits);
- return ret;
-}
-
-static bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
-{
- struct rb_node *nd;
- bool ret = machine__read_build_ids(&session->machines.host, with_hits);
-
- for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
- struct machine *pos = rb_entry(nd, struct machine, rb_node);
- ret |= machine__read_build_ids(pos, with_hits);
- }
-
- return ret;
-}
-
static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
struct perf_evlist *evlist)
{