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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-05-09 21:14:07 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-05-09 21:14:07 -0300 |
| commit | 4cc4945844fe2cf493f1783b6ce938ba1617d5c2 (patch) | |
| tree | d4d94f2f4447acf93473ec47de1ef5851fca9f00 /tools | |
| parent | 3ceb0d4438876a65606c258e5d69e03e57460dd6 (diff) | |
| download | linux-4cc4945844fe2cf493f1783b6ce938ba1617d5c2.tar.bz2 | |
perf symbols: Check if a struct machine instance was found
Which can happen when processing old files that had no fake kernel MMAP,
events.
That shouldn't result in perf_session__create_kernel_maps not being
called, this will be fixed in a followup patch, for now do these checks
to avoid segfaulting.
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/event.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 46563e16c3f5..dfc8bf64d70f 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -493,8 +493,10 @@ int event__process_mmap(event_t *self, struct perf_session *session) return 0; } - thread = perf_session__findnew(session, self->mmap.pid); machine = perf_session__find_host_machine(session); + if (machine == NULL) + goto out_problem; + thread = perf_session__findnew(session, self->mmap.pid); map = map__new(&machine->user_dsos, self->mmap.start, self->mmap.len, self->mmap.pgoff, self->mmap.pid, self->mmap.filename, @@ -552,6 +554,10 @@ void thread__find_addr_map(struct thread *self, if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { al->level = 'k'; machine = perf_session__find_host_machine(session); + if (machine == NULL) { + al->map = NULL; + return; + } mg = &machine->kmaps; } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { al->level = '.'; @@ -559,7 +565,7 @@ void thread__find_addr_map(struct thread *self, } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { al->level = 'g'; machine = perf_session__find_machine(session, pid); - if (!machine) { + if (machine == NULL) { al->map = NULL; return; } |