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perf trace: Add support for syscalls vs raw_syscalls

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Older kernels (e.g., RHEL6) do system call tracing via
syscalls:sys_{enter,exit} rather than raw_syscalls. Update perf-trace to
detect lack of raw_syscalls support and try syscalls.

Signed-off-by: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1386211302-31303-2-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Ahern 2013-12-04 19:41:39 -07:00 committed by Arnaldo Carvalho de Melo
parent 6d65894bc0
commit 9aca7f1792
1 changed files with 26 additions and 2 deletions
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28
tools/perf/builtin-trace.c
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@ -12,6 +12,7 @@
#include "util/thread_map.h" #include "util/thread_map.h"
#include "util/stat.h" #include "util/stat.h"
#include "trace-event.h" #include "trace-event.h"
#include "util/parse-events.h"
#include <libaudit.h> #include <libaudit.h>
#include <stdlib.h> #include <stdlib.h>
@ -173,6 +174,10 @@ static struct perf_evsel *perf_evsel__syscall_newtp(const char *direction, void
{ {
struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction); struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
/* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
if (evsel == NULL)
evsel = perf_evsel__newtp("syscalls", direction);
if (evsel) { if (evsel) {
if (perf_evsel__init_syscall_tp(evsel, handler)) if (perf_evsel__init_syscall_tp(evsel, handler))
goto out_delete; goto out_delete;
@ -1801,10 +1806,11 @@ static int trace__record(int argc, const char **argv)
"-R", "-R",
"-m", "1024", "-m", "1024",
"-c", "1", "-c", "1",
"-e", "raw_syscalls:sys_enter,raw_syscalls:sys_exit", "-e",
}; };
rec_argc = ARRAY_SIZE(record_args) + argc; /* +1 is for the event string below */
rec_argc = ARRAY_SIZE(record_args) + 1 + argc;
rec_argv = calloc(rec_argc + 1, sizeof(char *)); rec_argv = calloc(rec_argc + 1, sizeof(char *));
if (rec_argv == NULL) if (rec_argv == NULL)
@ -1813,6 +1819,17 @@ static int trace__record(int argc, const char **argv)
for (i = 0; i < ARRAY_SIZE(record_args); i++) for (i = 0; i < ARRAY_SIZE(record_args); i++)
rec_argv[i] = record_args[i]; rec_argv[i] = record_args[i];
/* event string may be different for older kernels - e.g., RHEL6 */
if (is_valid_tracepoint("raw_syscalls:sys_enter"))
rec_argv[i] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
else if (is_valid_tracepoint("syscalls:sys_enter"))
rec_argv[i] = "syscalls:sys_enter,syscalls:sys_exit";
else {
pr_err("Neither raw_syscalls nor syscalls events exist.\n");
return -1;
}
i++;
for (j = 0; j < (unsigned int)argc; j++, i++) for (j = 0; j < (unsigned int)argc; j++, i++)
rec_argv[i] = argv[j]; rec_argv[i] = argv[j];
@ -2048,6 +2065,10 @@ static int trace__replay(struct trace *trace)
evsel = perf_evlist__find_tracepoint_by_name(session->evlist, evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
"raw_syscalls:sys_enter"); "raw_syscalls:sys_enter");
/* older kernels have syscalls tp versus raw_syscalls */
if (evsel == NULL)
evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
"syscalls:sys_enter");
if (evsel == NULL) { if (evsel == NULL) {
pr_err("Data file does not have raw_syscalls:sys_enter event\n"); pr_err("Data file does not have raw_syscalls:sys_enter event\n");
goto out; goto out;
@ -2061,6 +2082,9 @@ static int trace__replay(struct trace *trace)
evsel = perf_evlist__find_tracepoint_by_name(session->evlist, evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
"raw_syscalls:sys_exit"); "raw_syscalls:sys_exit");
if (evsel == NULL)
evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
"syscalls:sys_exit");
if (evsel == NULL) { if (evsel == NULL) {
pr_err("Data file does not have raw_syscalls:sys_exit event\n"); pr_err("Data file does not have raw_syscalls:sys_exit event\n");
goto out; goto out;