mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 10:32:35 +00:00
8d8c8e4cb3
Add --purge FILE to remove all caches of FILE. Since the current --remove FILE removes a cache which has same build-id of given FILE. Since the command takes a FILE path, it can confuse user who tries to remove cache about FILE path. ----- # ./perf buildid-cache -v --add ./perf Adding 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok # (update the ./perf binary) # ./perf buildid-cache -v --remove ./perf Removing 305bbd1be68f66eca7e2d78db294653031edfa79 ./perf: FAIL ./perf wasn't in the cache ----- Actually, the --remove's FAIL is not shown, it just silently fails. So, this patch adds --purge FILE action for such usecase. perf buildid-cache --purge FILE removes all caches which has same FILE path. In other words, it removes all caches including old binaries. ----- # ./perf buildid-cache -v --add ./perf Adding 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok # (update the ./perf binary) # ./perf buildid-cache -v --purge ./perf Removing 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok ----- BTW, if you want to purge all the caches, remove ~/.debug/* . Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20150227045026.1999.64084.stgit@localhost.localdomain [ s/dirname/dir_name/g to fix build on fedora14, where dirname is a global ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
541 lines
12 KiB
C
541 lines
12 KiB
C
/*
|
|
* build-id.c
|
|
*
|
|
* build-id support
|
|
*
|
|
* Copyright (C) 2009, 2010 Red Hat Inc.
|
|
* Copyright (C) 2009, 2010 Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
*/
|
|
#include "util.h"
|
|
#include <stdio.h>
|
|
#include "build-id.h"
|
|
#include "event.h"
|
|
#include "symbol.h"
|
|
#include <linux/kernel.h>
|
|
#include "debug.h"
|
|
#include "session.h"
|
|
#include "tool.h"
|
|
#include "header.h"
|
|
#include "vdso.h"
|
|
|
|
|
|
static bool no_buildid_cache;
|
|
|
|
int build_id__mark_dso_hit(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct perf_evsel *evsel __maybe_unused,
|
|
struct machine *machine)
|
|
{
|
|
struct addr_location al;
|
|
u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
|
|
struct thread *thread = machine__findnew_thread(machine, sample->pid,
|
|
sample->tid);
|
|
|
|
if (thread == NULL) {
|
|
pr_err("problem processing %d event, skipping it.\n",
|
|
event->header.type);
|
|
return -1;
|
|
}
|
|
|
|
thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, &al);
|
|
|
|
if (al.map != NULL)
|
|
al.map->dso->hit = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int perf_event__exit_del_thread(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_sample *sample
|
|
__maybe_unused,
|
|
struct machine *machine)
|
|
{
|
|
struct thread *thread = machine__findnew_thread(machine,
|
|
event->fork.pid,
|
|
event->fork.tid);
|
|
|
|
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);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct perf_tool build_id__mark_dso_hit_ops = {
|
|
.sample = build_id__mark_dso_hit,
|
|
.mmap = perf_event__process_mmap,
|
|
.mmap2 = perf_event__process_mmap2,
|
|
.fork = perf_event__process_fork,
|
|
.exit = perf_event__exit_del_thread,
|
|
.attr = perf_event__process_attr,
|
|
.build_id = perf_event__process_build_id,
|
|
};
|
|
|
|
int build_id__sprintf(const u8 *build_id, int len, char *bf)
|
|
{
|
|
char *bid = bf;
|
|
const u8 *raw = build_id;
|
|
int i;
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
sprintf(bid, "%02x", *raw);
|
|
++raw;
|
|
bid += 2;
|
|
}
|
|
|
|
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];
|
|
|
|
if (!dso->has_build_id)
|
|
return NULL;
|
|
|
|
build_id__sprintf(dso->build_id, sizeof(dso->build_id), build_id_hex);
|
|
return build_id__filename(build_id_hex, bf, size);
|
|
}
|
|
|
|
#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 = writen(fd, &b, sizeof(b));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return write_padded(fd, name, name_len + 1, len);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
void disable_buildid_cache(void)
|
|
{
|
|
no_buildid_cache = true;
|
|
}
|
|
|
|
static char *build_id_cache__dirname_from_path(const char *name,
|
|
bool is_kallsyms, bool is_vdso)
|
|
{
|
|
char *realname = (char *)name, *filename;
|
|
bool slash = is_kallsyms || is_vdso;
|
|
|
|
if (!slash) {
|
|
realname = realpath(name, NULL);
|
|
if (!realname)
|
|
return 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;
|
|
|
|
if (mkdir_p(dir_name, 0755))
|
|
goto out_free;
|
|
|
|
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))
|
|
goto out_free;
|
|
}
|
|
|
|
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;
|
|
|
|
*tmp = '/';
|
|
targetname = filename + strlen(buildid_dir) - 5;
|
|
memcpy(targetname, "../..", 5);
|
|
|
|
if (symlink(targetname, linkname) == 0)
|
|
err = 0;
|
|
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, 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, 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 size_t size = PATH_MAX;
|
|
char *filename = zalloc(size),
|
|
*linkname = zalloc(size), *tmp;
|
|
int err = -1;
|
|
|
|
if (filename == NULL || linkname == NULL)
|
|
goto out_free;
|
|
|
|
if (!build_id__filename(sbuild_id, linkname, size))
|
|
goto out_free;
|
|
|
|
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:
|
|
*/
|
|
tmp = strrchr(linkname, '/') + 1;
|
|
snprintf(tmp, size - (tmp - linkname), "%s", 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)
|
|
{
|
|
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,
|
|
is_kallsyms, is_vdso);
|
|
}
|
|
|
|
static int __dsos__cache_build_ids(struct list_head *head,
|
|
struct machine *machine)
|
|
{
|
|
struct dso *pos;
|
|
int err = 0;
|
|
|
|
dsos__for_each_with_build_id(pos, head)
|
|
if (dso__cache_build_id(pos, machine))
|
|
err = -1;
|
|
|
|
return err;
|
|
}
|
|
|
|
static int machine__cache_build_ids(struct machine *machine)
|
|
{
|
|
int ret = __dsos__cache_build_ids(&machine->kernel_dsos.head, machine);
|
|
ret |= __dsos__cache_build_ids(&machine->user_dsos.head, machine);
|
|
return ret;
|
|
}
|
|
|
|
int perf_session__cache_build_ids(struct perf_session *session)
|
|
{
|
|
struct rb_node *nd;
|
|
int ret;
|
|
|
|
if (no_buildid_cache)
|
|
return 0;
|
|
|
|
if (mkdir(buildid_dir, 0755) != 0 && errno != EEXIST)
|
|
return -1;
|
|
|
|
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);
|
|
}
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|