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authorArnaldo Carvalho de Melo <acme@redhat.com>2013-11-11 09:44:09 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-11-11 15:56:39 -0300
commit62605dc50c27bf0e4ff69b7b3166f226586aff02 (patch)
treee858c9a71749a3d280b25a7ab7928dcbeba51a73 /tools/perf/util
parentef503831d8d64e12c6dad5547875cfcd4c5d043c (diff)
perf record: Synthesize non-exec MMAP records when --data used
When perf_event_attr.mmap_data is set the kernel will generate PERF_RECORD_MMAP events when non-exec (data, SysV mem) mmaps are created, so we need to synthesize from /proc/pid/maps for existing threads, as we do for exec mmaps. Right now just 'perf record' does it, but any other tool that uses perf_event__synthesize_thread(s|map) can request it. Reported-by: Don Zickus <dzickus@redhat.com> Tested-by: Don Zickus <dzickus@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Bill Gray <bgray@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joe Mario <jmario@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Fowles <rfowles@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-ihwzraikx23ian9txinogvv2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
-rw-r--r--tools/perf/util/event.c50
-rw-r--r--tools/perf/util/event.h4
2 files changed, 32 insertions, 22 deletions
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index ec9ae1114ed4..6e3a846aed0e 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -170,7 +170,8 @@ static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
union perf_event *event,
pid_t pid, pid_t tgid,
perf_event__handler_t process,
- struct machine *machine)
+ struct machine *machine,
+ bool mmap_data)
{
char filename[PATH_MAX];
FILE *fp;
@@ -188,10 +189,6 @@ static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
}
event->header.type = PERF_RECORD_MMAP;
- /*
- * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
- */
- event->header.misc = PERF_RECORD_MISC_USER;
while (1) {
char bf[BUFSIZ];
@@ -215,9 +212,17 @@ static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
if (n != 5)
continue;
+ /*
+ * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
+ */
+ event->header.misc = PERF_RECORD_MISC_USER;
- if (prot[2] != 'x')
- continue;
+ if (prot[2] != 'x') {
+ if (!mmap_data || prot[0] != 'r')
+ continue;
+
+ event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
+ }
if (!strcmp(execname, ""))
strcpy(execname, anonstr);
@@ -304,20 +309,21 @@ static int __event__synthesize_thread(union perf_event *comm_event,
pid_t pid, int full,
perf_event__handler_t process,
struct perf_tool *tool,
- struct machine *machine)
+ struct machine *machine, bool mmap_data)
{
pid_t tgid = perf_event__synthesize_comm(tool, comm_event, pid, full,
process, machine);
if (tgid == -1)
return -1;
return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
- process, machine);
+ process, machine, mmap_data);
}
int perf_event__synthesize_thread_map(struct perf_tool *tool,
struct thread_map *threads,
perf_event__handler_t process,
- struct machine *machine)
+ struct machine *machine,
+ bool mmap_data)
{
union perf_event *comm_event, *mmap_event;
int err = -1, thread, j;
@@ -334,7 +340,8 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
for (thread = 0; thread < threads->nr; ++thread) {
if (__event__synthesize_thread(comm_event, mmap_event,
threads->map[thread], 0,
- process, tool, machine)) {
+ process, tool, machine,
+ mmap_data)) {
err = -1;
break;
}
@@ -356,10 +363,10 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
/* if not, generate events for it */
if (need_leader &&
- __event__synthesize_thread(comm_event,
- mmap_event,
- comm_event->comm.pid, 0,
- process, tool, machine)) {
+ __event__synthesize_thread(comm_event, mmap_event,
+ comm_event->comm.pid, 0,
+ process, tool, machine,
+ mmap_data)) {
err = -1;
break;
}
@@ -374,7 +381,7 @@ out:
int perf_event__synthesize_threads(struct perf_tool *tool,
perf_event__handler_t process,
- struct machine *machine)
+ struct machine *machine, bool mmap_data)
{
DIR *proc;
struct dirent dirent, *next;
@@ -404,7 +411,7 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
* one thread couldn't be synthesized.
*/
__event__synthesize_thread(comm_event, mmap_event, pid, 1,
- process, tool, machine);
+ process, tool, machine, mmap_data);
}
err = 0;
@@ -528,19 +535,22 @@ int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
{
- return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
+ return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
event->mmap.pid, event->mmap.tid, event->mmap.start,
- event->mmap.len, event->mmap.pgoff, event->mmap.filename);
+ event->mmap.len, event->mmap.pgoff,
+ (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
+ event->mmap.filename);
}
size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
{
return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
- " %02x:%02x %"PRIu64" %"PRIu64"]: %s\n",
+ " %02x:%02x %"PRIu64" %"PRIu64"]: %c %s\n",
event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
event->mmap2.min, event->mmap2.ino,
event->mmap2.ino_generation,
+ (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
event->mmap2.filename);
}
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index f8d70f3003ab..30fec9901e44 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -208,10 +208,10 @@ typedef int (*perf_event__handler_t)(struct perf_tool *tool,
int perf_event__synthesize_thread_map(struct perf_tool *tool,
struct thread_map *threads,
perf_event__handler_t process,
- struct machine *machine);
+ struct machine *machine, bool mmap_data);
int perf_event__synthesize_threads(struct perf_tool *tool,
perf_event__handler_t process,
- struct machine *machine);
+ struct machine *machine, bool mmap_data);
int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
perf_event__handler_t process,
struct machine *machine,