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perf trace record: handle commands correctly

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Because the perf-trace shell scripts hard-coded the use of the
perf-record system-wide param, a perf trace record session was always
system wide, even if it was given a command.

If given a command, perf trace record now only records the events for
the command, as users expect.

If no command is given, or if the '-a' option is used, the recorded
events are system-wide, as before.

root@tropicana:~# perf trace record syscall-counts ls -al
root@tropicana:~# perf trace
              ls-23152 [000] 39984.890387: sys_enter: NR 12 (0, 0, 0, 0, 0, 0)
              ls-23152 [000] 39984.890404: sys_enter: NR 9 (0, 0, 0, 0, 0, 0)

root@tropicana:~# perf trace record syscall-counts -a ls -al
root@tropicana:~# perf trace
    npviewer.bin-22297 [000] 39831.102709: sys_enter: NR 168 (0, 0, 0, 0, 0, 0)
              ls-23111 [000] 39831.107679: sys_enter: NR 59 (0, 0, 0, 0, 0, 0)

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Acked-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
This commit is contained in:
Tom Zanussi 2010-11-10 08:15:43 -06:00
parent bca647aac5
commit 34c86ea97e
1 changed files with 28 additions and 4 deletions
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32
tools/perf/builtin-trace.c
View file

@ -10,6 +10,7 @@
#include "util/symbol.h"
#include "util/thread.h"
#include "util/trace-event.h"
#include "util/parse-options.h"
#include "util/util.h"
static char const *script_name;
@ -17,6 +18,7 @@ static char const *generate_script_lang;
static bool debug_mode;
static u64 last_timestamp;
static u64 nr_unordered;
extern const struct option record_options[];
static int default_start_script(const char *script __unused,
int argc __unused,
@ -566,6 +568,20 @@ static const struct option options[] = {
OPT_END()
};
static bool have_cmd(int argc, const char **argv)
{
char **__argv = malloc(sizeof(const char *) * argc);
if (!__argv)
die("malloc");
memcpy(__argv, argv, sizeof(const char *) * argc);
argc = parse_options(argc, (const char **)__argv, record_options,
NULL, PARSE_OPT_STOP_AT_NON_OPTION);
free(__argv);
return argc != 0;
}
int cmd_trace(int argc, const char **argv, const char *prefix __used)
{
struct perf_session *session;
@ -663,20 +679,28 @@ int cmd_trace(int argc, const char **argv, const char *prefix __used)
}
if (suffix) {
bool system_wide = false;
int j = 0;
script_path = get_script_path(argv[2], suffix);
if (!script_path) {
fprintf(stderr, "script not found\n");
return -1;
}
if (!strcmp(suffix, RECORD_SUFFIX))
system_wide = !have_cmd(argc - 2, &argv[2]);
__argv = malloc((argc + 1) * sizeof(const char *));
if (!__argv)
die("malloc");
__argv[0] = "/bin/sh";
__argv[1] = script_path;
__argv[j++] = "/bin/sh";
__argv[j++] = script_path;
if (system_wide)
__argv[j++] = "-a";
for (i = 3; i < argc; i++)
__argv[i - 1] = argv[i];
__argv[argc - 1] = NULL;
__argv[j++] = argv[i];
__argv[j++] = NULL;
execvp("/bin/sh", (char **)__argv);
free(__argv);