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perf evlist: Move the SIGUSR1 error reporting logic to prepare_workload

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So that we have the boilerplate in the preparation method, instead of
open coded in tools wanting the reporting when the exec fails.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-purbdzcphdveskh7wwmnm4t7@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2014-01-03 14:56:49 -03:00
parent f33cbe72e6
commit 735f7e0bbe
7 changed files with 32 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
tools/perf/builtin-record.c
View File

@ -390,7 +390,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
if (forks) {
err = perf_evlist__prepare_workload(evsel_list, &opts->target,
argv, file->is_pipe,
true);
workload_exec_failed_signal);
if (err < 0) {
pr_err("Couldn't run the workload!\n");
goto out_delete_session;
@ -507,20 +507,8 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
/*
* Let the child rip
*/
if (forks) {
struct sigaction act = {
.sa_flags = SA_SIGINFO,
.sa_sigaction = workload_exec_failed_signal,
};
/*
* perf_evlist__prepare_workload will, after we call
* perf_evlist__start_Workload, send a SIGUSR1 if the exec call
* fails, that we will catch in workload_signal to flip
* workload_exec_errno.
*/
sigaction(SIGUSR1, &act, NULL);
if (forks)
perf_evlist__start_workload(evsel_list);
}
for (;;) {
int hits = rec->samples;

17
tools/perf/builtin-stat.c
View File

@ -58,7 +58,6 @@
#include "util/thread.h"
#include "util/thread_map.h"
#include <signal.h>
#include <stdlib.h>
#include <sys/prctl.h>
#include <locale.h>
@ -542,8 +541,8 @@ static int __run_perf_stat(int argc, const char **argv)
}
if (forks) {
if (perf_evlist__prepare_workload(evsel_list, &target, argv,
false, true) < 0) {
if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
workload_exec_failed_signal) < 0) {
perror("failed to prepare workload");
return -1;
}
@ -598,18 +597,6 @@ static int __run_perf_stat(int argc, const char **argv)
clock_gettime(CLOCK_MONOTONIC, &ref_time);
if (forks) {
struct sigaction act = {
.sa_flags = SA_SIGINFO,
.sa_sigaction = workload_exec_failed_signal,
};
/*
* perf_evlist__prepare_workload will, after we call
* perf_evlist__start_Workload, send a SIGUSR1 if the exec call
* fails, that we will catch in workload_signal to flip
* workload_exec_errno.
*/
sigaction(SIGUSR1, &act, NULL);
perf_evlist__start_workload(evsel_list);
handle_initial_delay();

2
tools/perf/builtin-trace.c
View File

@ -1895,7 +1895,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
if (forks) {
err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
argv, false, false);
argv, false, NULL);
if (err < 0) {
fprintf(trace->output, "Couldn't run the workload!\n");
goto out_delete_maps;

3
tools/perf/tests/perf-record.c
View File

@ -83,8 +83,7 @@ int test__PERF_RECORD(void)
* so that we have time to open the evlist (calling sys_perf_event_open
* on all the fds) and then mmap them.
*/
err = perf_evlist__prepare_workload(evlist, &opts.target, argv,
false, false);
err = perf_evlist__prepare_workload(evlist, &opts.target, argv, false, NULL);
if (err < 0) {
pr_debug("Couldn't run the workload!\n");
goto out_delete_maps;

19
tools/perf/tests/task-exit.c
View File

@ -9,12 +9,21 @@
static int exited;
static int nr_exit;
static void sig_handler(int sig)
static void sig_handler(int sig __maybe_unused)
{
exited = 1;
}
if (sig == SIGUSR1)
nr_exit = -1;
/*
* perf_evlist__prepare_workload will send a SIGUSR1 if the fork fails, since
* we asked by setting its exec_error to this handler.
*/
static void workload_exec_failed_signal(int signo __maybe_unused,
siginfo_t *info __maybe_unused,
void *ucontext __maybe_unused)
{
exited = 1;
nr_exit = -1;
}
/*
@ -35,7 +44,6 @@ int test__task_exit(void)
const char *argv[] = { "true", NULL };
signal(SIGCHLD, sig_handler);
signal(SIGUSR1, sig_handler);
evlist = perf_evlist__new_default();
if (evlist == NULL) {
@ -57,7 +65,8 @@ int test__task_exit(void)
goto out_delete_maps;
}
err = perf_evlist__prepare_workload(evlist, &target, argv, false, true);
err = perf_evlist__prepare_workload(evlist, &target, argv, false,
workload_exec_failed_signal);
if (err < 0) {
pr_debug("Couldn't run the workload!\n");
goto out_delete_maps;

12
tools/perf/util/evlist.c
View File

@ -1029,7 +1029,7 @@ out_err:
int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target,
const char *argv[], bool pipe_output,
bool want_signal)
void (*exec_error)(int signo, siginfo_t *info, void *ucontext))
{
int child_ready_pipe[2], go_pipe[2];
char bf;
@ -1073,7 +1073,7 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *tar
execvp(argv[0], (char **)argv);
if (want_signal) {
if (exec_error) {
union sigval val;
val.sival_int = errno;
@ -1084,6 +1084,14 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *tar
exit(-1);
}
if (exec_error) {
struct sigaction act = {
.sa_flags = SA_SIGINFO,
.sa_sigaction = exec_error,
};
sigaction(SIGUSR1, &act, NULL);
}
if (target__none(target))
evlist->threads->map[0] = evlist->workload.pid;

3
tools/perf/util/evlist.h
View File

@ -103,7 +103,8 @@ int record_opts__config(struct record_opts *opts);
int perf_evlist__prepare_workload(struct perf_evlist *evlist,
struct target *target,
const char *argv[], bool pipe_output,
bool want_signal);
void (*exec_error)(int signo, siginfo_t *info,
void *ucontext));
int perf_evlist__start_workload(struct perf_evlist *evlist);
int perf_evlist__parse_mmap_pages(const struct option *opt,