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Date: Wed, 29 Jul 2015 01:12:49 -0700
From: tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: fweisbec@...il.com, namhyung@...nel.org, dsahern@...il.com,
adrian.hunter@...el.com, linux-kernel@...r.kernel.org,
hpa@...or.com, acme@...hat.com, jolsa@...hat.com,
tglx@...utronix.de, eranian@...gle.com, bp@...e.de,
mingo@...nel.org, rostedt@...dmis.org
Subject: [tip:perf/core] perf symbols:
Provide libtraceevent callback to resolve kernel symbols
Commit-ID: c3168b0db93ad5ffeede4ecdf807dab64270f55d
Gitweb: http://git.kernel.org/tip/c3168b0db93ad5ffeede4ecdf807dab64270f55d
Author: Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Wed, 22 Jul 2015 16:14:29 -0300
Committer: Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 23 Jul 2015 22:01:37 -0300
perf symbols: Provide libtraceevent callback to resolve kernel symbols
That provides the function signature expected by libtraceevent's
pevent_set_function_resolver().
Acked-by: David Ahern <dsahern@...il.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Borislav Petkov <bp@...e.de>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Link: http://lkml.kernel.org/n/tip-ie6hvlb6u15y4ulg9j1612zg@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/util/machine.c | 14 ++++++++++++++
tools/perf/util/machine.h | 4 ++++
tools/perf/util/trace-event.c | 45 ++++++++++++++++++++++++++++---------------
tools/perf/util/trace-event.h | 1 +
4 files changed, 49 insertions(+), 15 deletions(-)
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index d0bf1e5..22006c1 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1993,3 +1993,17 @@ struct dso *machine__findnew_dso(struct machine *machine, const char *filename)
{
return dsos__findnew(&machine->dsos, filename);
}
+
+char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
+{
+ struct machine *machine = vmachine;
+ struct map *map;
+ struct symbol *sym = map_groups__find_symbol(&machine->kmaps, MAP__FUNCTION, *addrp, &map, NULL);
+
+ if (sym == NULL)
+ return NULL;
+
+ *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL;
+ *addrp = map->unmap_ip(map, sym->start);
+ return sym->name;
+}
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index 887798e..ff5f78c 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -237,5 +237,9 @@ int machine__synthesize_threads(struct machine *machine, struct target *target,
pid_t machine__get_current_tid(struct machine *machine, int cpu);
int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
pid_t tid);
+/*
+ * For use with libtraceevent's pevent_set_function_resolver()
+ */
+char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp);
#endif /* __PERF_MACHINE_H */
diff --git a/tools/perf/util/trace-event.c b/tools/perf/util/trace-event.c
index 6322d37..667bd10 100644
--- a/tools/perf/util/trace-event.c
+++ b/tools/perf/util/trace-event.c
@@ -9,6 +9,7 @@
#include <linux/kernel.h>
#include <traceevent/event-parse.h>
#include "trace-event.h"
+#include "machine.h"
#include "util.h"
/*
@@ -19,6 +20,7 @@
* there.
*/
static struct trace_event tevent;
+static bool tevent_initialized;
int trace_event__init(struct trace_event *t)
{
@@ -32,6 +34,32 @@ int trace_event__init(struct trace_event *t)
return pevent ? 0 : -1;
}
+static int trace_event__init2(void)
+{
+ int be = traceevent_host_bigendian();
+ struct pevent *pevent;
+
+ if (trace_event__init(&tevent))
+ return -1;
+
+ pevent = tevent.pevent;
+ pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
+ pevent_set_file_bigendian(pevent, be);
+ pevent_set_host_bigendian(pevent, be);
+ tevent_initialized = true;
+ return 0;
+}
+
+int trace_event__register_resolver(struct machine *machine)
+{
+ if (!tevent_initialized && trace_event__init2())
+ return -1;
+
+ return pevent_set_function_resolver(tevent.pevent,
+ machine__resolve_kernel_addr,
+ machine);
+}
+
void trace_event__cleanup(struct trace_event *t)
{
traceevent_unload_plugins(t->plugin_list, t->pevent);
@@ -62,21 +90,8 @@ tp_format(const char *sys, const char *name)
struct event_format*
trace_event__tp_format(const char *sys, const char *name)
{
- static bool initialized;
-
- if (!initialized) {
- int be = traceevent_host_bigendian();
- struct pevent *pevent;
-
- if (trace_event__init(&tevent))
- return NULL;
-
- pevent = tevent.pevent;
- pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
- pevent_set_file_bigendian(pevent, be);
- pevent_set_host_bigendian(pevent, be);
- initialized = true;
- }
+ if (!tevent_initialized && trace_event__init2())
+ return NULL;
return tp_format(sys, name);
}
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index d5168f0..568128c 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -18,6 +18,7 @@ struct trace_event {
int trace_event__init(struct trace_event *t);
void trace_event__cleanup(struct trace_event *t);
+int trace_event__register_resolver(struct machine *machine);
struct event_format*
trace_event__tp_format(const char *sys, const char *name);
--
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