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libsysprof: provide build-id in MMAP2 event to capture writer

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We may not always get this value (in fact, I can't seem to actually get
the Kernel to provide it to me locally), but should we actually get it
this will send that along to the capture writer so it may add a @build-id\0
tail to the SysprofCaptureMap frame.
This commit is contained in:
Christian Hergert
2023-07-24 17:31:51 -07:00
parent a7fe9abb19
commit a0ce83eead
1 changed files with 31 additions and 9 deletions
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40
src/libsysprof/sysprof-sampler.c
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@ -182,16 +182,38 @@ sysprof_sampler_perf_event_stream_cb (const SysprofPerfEvent *event,
offset += sizeof (GPid) + sizeof (GPid);
memcpy (&time, event->mmap2.filename + offset, sizeof time);
sysprof_capture_writer_add_map (writer,
time,
cpu,
event->mmap2.pid,
event->mmap2.addr,
event->mmap2.addr + event->mmap2.len,
event->mmap2.pgoff,
0,
event->mmap2.filename);
if ((event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) != 0)
{
char build_id[G_N_ELEMENTS (event->mmap2.build_id) * 2 + 1];
guint len = MIN (G_N_ELEMENTS (event->mmap2.build_id), event->mmap2.build_id_size);
for (guint i = 0; i < len; i++)
g_snprintf (&build_id[len*2], 3, "%02x", event->mmap2.build_id[i]);
build_id[len*2] = 0;
sysprof_capture_writer_add_map_with_build_id (writer,
time,
cpu,
event->mmap2.pid,
event->mmap2.addr,
event->mmap2.addr + event->mmap2.len,
event->mmap2.pgoff,
event->mmap2.ino,
event->mmap2.filename,
build_id);
}
else
{
sysprof_capture_writer_add_map (writer,
time,
cpu,
event->mmap2.pid,
event->mmap2.addr,
event->mmap2.addr + event->mmap2.len,
event->mmap2.pgoff,
event->mmap2.ino,
event->mmap2.filename);
}
break;
case PERF_RECORD_READ: