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| author | David Ahern <dsahern@gmail.com> | 2013-12-04 19:41:39 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-12-05 10:05:45 -0300 |
| commit | 9aca7f1792c5d2d5d367bbe5cfe204fe40517929 (patch) | |
| tree | c83ff78b2785e7598f2175890e723c8783e454b1 /tools/perf/builtin-trace.c | |
| parent | 6d65894bc028d0342829ea1e64c9e9efad571124 (diff) | |
| download | linux-9aca7f1792c5d2d5d367bbe5cfe204fe40517929.tar.bz2 | |
perf trace: Add support for syscalls vs raw_syscalls
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>
Diffstat (limited to 'tools/perf/builtin-trace.c')
| -rw-r--r-- | tools/perf/builtin-trace.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 56afe339661a..a7aa771a98e6 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -12,6 +12,7 @@ #include "util/thread_map.h" #include "util/stat.h" #include "trace-event.h" +#include "util/parse-events.h" #include <libaudit.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); + /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ + if (evsel == NULL) + evsel = perf_evsel__newtp("syscalls", direction); + if (evsel) { if (perf_evsel__init_syscall_tp(evsel, handler)) goto out_delete; @@ -1801,10 +1806,11 @@ static int trace__record(int argc, const char **argv) "-R", "-m", "1024", "-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 *)); 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++) 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++) 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, "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) { pr_err("Data file does not have raw_syscalls:sys_enter event\n"); goto out; @@ -2061,6 +2082,9 @@ static int trace__replay(struct trace *trace) evsel = perf_evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit"); + if (evsel == NULL) + evsel = perf_evlist__find_tracepoint_by_name(session->evlist, + "syscalls:sys_exit"); if (evsel == NULL) { pr_err("Data file does not have raw_syscalls:sys_exit event\n"); goto out; |