forked from luck/tmp_suning_uos_patched
b36f19d572
We were still using the pathname found on the MMAP event, that could not
be the one we used when recording, so use the build-id cache for that,
only falling back to use the pathname in the MMAP event if no build-ids
are available.
With this we now also are able to do secure, seamless offline annotation.
Example:
[root@doppio linux-2.6-tip]# perf report -g none -v 2> /dev/null | head -10
8.12% Xorg /usr/lib64/libpixman-1.so.0.14.0 0x0000000000026d02 B [.] pixman_rasterize_edges
4.68% firefox /usr/lib64/xulrunner-1.9.1/libxul.so 0x00000000005dbdba B [.] 0x000000005dbdba
3.70% swapper /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff81022cea ! [k] read_hpet
2.96% init /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff81022cea ! [k] read_hpet
2.73% swapper /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff8100a738 ! [k] mwait_idle_with_hints
[root@doppio linux-2.6-tip]# perf annotate -v pixman_rasterize_edges 2>&1 | grep Executing
Executing: objdump --start-address=0x000000371ce26670 --stop-address=0x000000371ce2709f -dS /root/.debug/.build-id/bd/6ac5199137aaeb279f864717d8d061477466c1|grep -v /root/.debug/.build-id/bd/6ac5199137aaeb279f864717d8d061477466c1|expand
[root@doppio linux-2.6-tip]# perf buildid-list | grep libpixman-1.so.0.14.0
bd6ac5199137aaeb279f864717d8d061477466c1 /usr/lib64/libpixman-1.so.0.14.0
[root@doppio linux-2.6-tip]#
Reported-by: Stephane Eranian <eranian@google.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
62 lines
1.5 KiB
C
62 lines
1.5 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>
|
|
|
|
static int build_id__mark_dso_hit(event_t *event, struct perf_session *session)
|
|
{
|
|
struct addr_location al;
|
|
u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
|
|
struct thread *thread = perf_session__findnew(session, event->ip.pid);
|
|
|
|
if (thread == NULL) {
|
|
pr_err("problem processing %d event, skipping it.\n",
|
|
event->header.type);
|
|
return -1;
|
|
}
|
|
|
|
thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
|
|
event->ip.pid, event->ip.ip, &al);
|
|
|
|
if (al.map != NULL)
|
|
al.map->dso->hit = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct perf_event_ops build_id__mark_dso_hit_ops = {
|
|
.sample = build_id__mark_dso_hit,
|
|
.mmap = event__process_mmap,
|
|
.fork = event__process_task,
|
|
};
|
|
|
|
char *dso__build_id_filename(struct dso *self, char *bf, size_t size)
|
|
{
|
|
char build_id_hex[BUILD_ID_SIZE * 2 + 1];
|
|
const char *home;
|
|
|
|
if (!self->has_build_id)
|
|
return NULL;
|
|
|
|
build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex);
|
|
home = getenv("HOME");
|
|
if (bf == NULL) {
|
|
if (asprintf(&bf, "%s/%s/.build-id/%.2s/%s", home,
|
|
DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2) < 0)
|
|
return NULL;
|
|
} else
|
|
snprintf(bf, size, "%s/%s/.build-id/%.2s/%s", home,
|
|
DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2);
|
|
return bf;
|
|
}
|