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authorArnaldo Carvalho de Melo <acme@redhat.com>2010-05-09 21:14:07 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-05-09 21:14:07 -0300
commit4cc4945844fe2cf493f1783b6ce938ba1617d5c2 (patch)
treed4d94f2f4447acf93473ec47de1ef5851fca9f00 /tools
parent3ceb0d4438876a65606c258e5d69e03e57460dd6 (diff)
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.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 46563e16c3f..dfc8bf64d70 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;
}