Messages in this thread Patch in this message | | | Date | Tue, 12 Nov 2013 08:57:00 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH 2/2] perf trace: Fix segfault on perf trace -i perf.data |
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Em Tue, Nov 12, 2013 at 08:46:09AM -0300, Arnaldo Carvalho de Melo escreveu: > Em Tue, Nov 12, 2013 at 03:25:00PM +0900, Namhyung Kim escreveu: > > From: Namhyung Kim <namhyung.kim@lge.com>
> > When replaying a previous record session, it'll get a segfault since > > it doesn't initialize evsel->priv for finding syscall id. So fix it > > by initialize sys_enter/exit evsel manually.
> > While at it, factor out perf_evsel__init_syscall_tp() to init a > > syscall evsel and remove unused perf_session__has_tp().
> Try to avoid these "while at it" to combine multiple patches into one > :-)
> I'll try to do it for you this time as it fixes a real problem, thanks > for fixing it!
So this becomes the first part of this patch, split from yours and massaged a bit so that by looking at the patch it becomes quickly clear what it is doing, please let me now if I can keep this as-is (with your authorship, etc).
I'll test this all out after finishing the next part of the split up.
commit 296f6ce34590099740bfe03ced37f6f53a0133f8 Author: Namhyung Kim <namhyung@kernel.org> Date: Tue Nov 12 08:51:45 2013 -0300
perf trace: Separate tp syscall field caching into init routine to be reused
We need to set this in evsels coming out of a perf.data file header, not just for new ones created for live sessions.
So separate the code that caches the syscall entry/exit tracepoint format fields into a new function that will be used in the next changeset.
Signed-off-by: Namhyung Kim <namhyung@kernel.org> 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: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-iv4vbx2064hc2drv38egqzee@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index aeb6296a76bd..3fa1dce6d43e 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -149,20 +149,32 @@ static void perf_evsel__delete_priv(struct perf_evsel *evsel) perf_evsel__delete(evsel); } +static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel, void *handler) +{ + evsel->priv = malloc(sizeof(struct syscall_tp)); + if (evsel->priv != NULL) { + if (perf_evsel__init_sc_tp_uint_field(evsel, id)) + goto out_delete; + + evsel->handler = handler; + return 0; + } + + return -ENOMEM; + +out_delete: + free(evsel->priv); + evsel->priv = NULL; + return -ENOENT; +} + static struct perf_evsel *perf_evsel__syscall_newtp(const char *direction, void *handler) { struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction); if (evsel) { - evsel->priv = malloc(sizeof(struct syscall_tp)); - - if (evsel->priv == NULL) + if (perf_evsel__init_syscall_tp(evsel, handler)) goto out_delete; - - if (perf_evsel__init_sc_tp_uint_field(evsel, id)) - goto out_delete; - - evsel->handler = handler; } return evsel;
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