[PATCH 2/3] perf tools: Add mmap[2] events to ctf conversion

Geneviève Bastien
2017-07-27T18:31:03Z

This adds the mmap and mmap2 events to the CTF trace obtained from perf
data.

These events will allow CTF trace visualization tools like Trace
Compass to automatically resolve the symbols of the callchain to the
corresponding function or origin library.

To include those events, one needs to convert with the --all option.
Here follows an output of babeltrace:

$ sudo perf data convert --all --to-ctf myctftrace
$ babeltrace ./myctftrace
[19:00:00.000000000] (+0.000000000) perf_mmap2: { cpu_id = 0 },
{ pid = 638, tid = 638, start = 0x7F54AE39E000, filename =
"/usr/lib/ld-2.25.so" }
[19:00:00.000000000] (+0.000000000) perf_mmap2: { cpu_id = 0 }, { pid =
638, tid = 638, start = 0x7F54AE565000, filename =
"/usr/lib/libudev.so.1.6.6" }
[19:00:00.000000000] (+0.000000000) perf_mmap2: { cpu_id = 0 }, { pid =
638, tid = 638, start = 0x7FFC093EA000, filename = "[vdso]" }

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Julien Desfossez <jdesfossez@efficios.com>
Cc: Francis Deslauriers <francis.deslauriers@efficios.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Geneviève Bastien <gbastien@versatic.net>
Signed-off-by: Geneviève Bastien <gbastien@versatic.net>
---
tools/perf/util/data-convert-bt.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)

diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
index e99bccdb898d..c47b0943ef88 100644
--- a/tools/perf/util/data-convert-bt.c
+++ b/tools/perf/util/data-convert-bt.c
@@ -76,6 +76,8 @@ struct ctf_writer {
struct bt_ctf_event_class *comm_class;
struct bt_ctf_event_class *exit_class;
struct bt_ctf_event_class *fork_class;
+ struct bt_ctf_event_class *mmap_class;
+ struct bt_ctf_event_class *mmap2_class;
};

struct convert {
@@ -916,6 +918,18 @@ __FUNC_PROCESS_NON_SAMPLE(exit,
__NON_SAMPLE_SET_FIELD(fork, u32, ptid);
__NON_SAMPLE_SET_FIELD(fork, u64, time);
)
+__FUNC_PROCESS_NON_SAMPLE(mmap,
+ __NON_SAMPLE_SET_FIELD(mmap, u32, pid);
+ __NON_SAMPLE_SET_FIELD(mmap, u32, tid);
+ __NON_SAMPLE_SET_FIELD(mmap, u64_hex, start);
+ __NON_SAMPLE_SET_FIELD(mmap, string, filename);
+)
+__FUNC_PROCESS_NON_SAMPLE(mmap2,
+ __NON_SAMPLE_SET_FIELD(mmap2, u32, pid);
+ __NON_SAMPLE_SET_FIELD(mmap2, u32, tid);
+ __NON_SAMPLE_SET_FIELD(mmap2, u64_hex, start);
+ __NON_SAMPLE_SET_FIELD(mmap2, string, filename);
+)
#undef __NON_SAMPLE_SET_FIELD
#undef __FUNC_PROCESS_NON_SAMPLE

@@ -1255,6 +1269,19 @@ __FUNC_ADD_NON_SAMPLE_EVENT_CLASS(exit,
__NON_SAMPLE_ADD_FIELD(u64, time);
)

+__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap,
+ __NON_SAMPLE_ADD_FIELD(u32, pid);
+ __NON_SAMPLE_ADD_FIELD(u32, tid);
+ __NON_SAMPLE_ADD_FIELD(u64_hex, start);
+ __NON_SAMPLE_ADD_FIELD(string, filename);
+)
+
+__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap2,
+ __NON_SAMPLE_ADD_FIELD(u32, pid);
+ __NON_SAMPLE_ADD_FIELD(u32, tid);
+ __NON_SAMPLE_ADD_FIELD(u64_hex, start);
+ __NON_SAMPLE_ADD_FIELD(string, filename);
+)
#undef __NON_SAMPLE_ADD_FIELD
#undef __FUNC_ADD_NON_SAMPLE_EVENT_CLASS

@@ -1272,6 +1299,12 @@ static int setup_non_sample_events(struct ctf_writer *cw,
ret = add_fork_event(cw);
if (ret)
return ret;
+ ret = add_mmap_event(cw);
+ if (ret)
+ return ret;
+ ret = add_mmap2_event(cw);
+ if (ret)
+ return ret;
return 0;
}

@@ -1573,6 +1606,8 @@ int bt_convert__perf2ctf(const char *input, const char *path,
c.tool.comm = process_comm_event;
c.tool.exit = process_exit_event;
c.tool.fork = process_fork_event;
+ c.tool.mmap = process_mmap_event;
+ c.tool.mmap2 = process_mmap2_event;
}

err = perf_config(convert__config, &c);
--
2.13.3