mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 09:46:53 +07:00
5c5e854bc7
This patch adds support for the new PERF_RECORD_MMAP2 record type
exposed by the kernel. This is an extended PERF_RECORD_MMAP record.
It adds for each file-backed mapping the device major, minor number and
the inode number and generation.
This triplet uniquely identifies the source of a file-backed mapping. It
can be used to detect identical virtual mappings between processes, for
instance.
The patch will prefer MMAP2 over MMAP.
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1377079825-19057-3-git-send-email-eranian@google.com
[ Cope with 314add6 "Change machine__findnew_thread() to set thread pid",
fix 'perf test' regression test entry affected,
use perf_missing_features.mmap2 to fallback to not using .mmap2 in older kernels,
so that new tools can work with kernels where this feature is not present ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
109 lines
2.5 KiB
C
109 lines
2.5 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>
|
|
#include "debug.h"
|
|
#include "session.h"
|
|
#include "tool.h"
|
|
|
|
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->pid);
|
|
|
|
if (thread == NULL) {
|
|
pr_err("problem processing %d event, skipping it.\n",
|
|
event->header.type);
|
|
return -1;
|
|
}
|
|
|
|
thread__find_addr_map(thread, machine, 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;
|
|
}
|
|
|
|
char *dso__build_id_filename(struct dso *self, char *bf, size_t size)
|
|
{
|
|
char build_id_hex[BUILD_ID_SIZE * 2 + 1];
|
|
|
|
if (!self->has_build_id)
|
|
return NULL;
|
|
|
|
build_id__sprintf(self->build_id, sizeof(self->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;
|
|
}
|