// SPDX-License-Identifier: GPL-2.0
/*
* 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" // lsdir(), mkdir_p(), rm_rf()
#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "util/copyfile.h"
#include "dso.h"
#include "build-id.h"
#include "event.h"
#include "namespaces.h"
#include "map.h"
#include "symbol.h"
#include "thread.h"
#include <linux/kernel.h>
#include "debug.h"
#include "session.h"
#include "tool.h"
#include "header.h"
#include "vdso.h"
#include "path.h"
#include "probe-file.h"
#include "strlist.h"
#ifdef HAVE_DEBUGINFOD_SUPPORT
#include <elfutils/debuginfod.h>
#endif
#include <linux/ctype.h>
#include <linux/zalloc.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 evsel *evsel __maybe_unused,
struct machine *machine)
{
struct addr_location al;
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;
}
if (thread__find_map(thread, sample->cpumode, sample->ip, &al))
al.map->dso->hit = 1;
thread__put(thread);
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) {
machine__remove_thread(machine, thread);
thread__put(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,
.ordered_events = true,
};
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 (bid - bf) + 1;
}
int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id)
{
char notes[PATH_MAX];
u8 build_id[BUILD_ID_SIZE];
int ret;
if (!root_dir)
root_dir = "";
scnprintf(notes, sizeof(notes), "%s/sys/kernel/notes", root_dir);
ret = sysfs__read_build_id(notes, build_id, sizeof(build_id));
if (ret < 0)
return ret;
return build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
}
int filename__sprintf_build_id(const char *pathname, char *sbuild_id)
{
u8 build_id[BUILD_ID_SIZE];
int ret;
ret = filename__read_build_id(pathname, build_id, sizeof(build_id));
if (ret < 0)
return ret;
else if (ret != sizeof(build_id))
return -EINVAL;
return build_id__sprintf(build_id, sizeof(build_id), sbuild_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;
}
char *build_id_cache__kallsyms_path(const char *sbuild_id, char *bf,
size_t size)
{
bool retry_old = true;
snprintf(bf, size, "%s/%s/%s/kallsyms",
buildid_dir, DSO__NAME_KALLSYMS, sbuild_i