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libsysprof-capture: discover the end time if necessary

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If we get a capture file without a valid end-time, we should just go
discover that up-front instead of dealing with it all over the place.
This commit is contained in:
Christian Hergert
2019-05-17 11:11:39 -07:00
parent b5c855a01f
commit 8feeec782f
1 changed files with 36 additions and 0 deletions
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36
src/libsysprof-capture/sysprof-capture-reader.c
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@ -109,6 +109,35 @@ sysprof_capture_reader_get_filename (SysprofCaptureReader *self)
return self->filename; return self->filename;
} }
static void
sysprof_capture_reader_discover_end_time (SysprofCaptureReader *self)
{
SysprofCaptureFrame frame;
g_assert (self != NULL);
while (sysprof_capture_reader_peek_frame (self, &frame))
{
gint64 end_time = frame.time;
if (frame.type == SYSPROF_CAPTURE_FRAME_MARK)
{
const SysprofCaptureMark *mark = NULL;
if ((mark = sysprof_capture_reader_read_mark (self)))
end_time = frame.time + MAX (0, mark->duration);
}
if (end_time > self->end_time)
self->end_time = end_time;
if (!sysprof_capture_reader_skip (self))
break;
}
sysprof_capture_reader_reset (self);
}
/** /**
* sysprof_capture_reader_new_from_fd: * sysprof_capture_reader_new_from_fd:
* @fd: an fd to take ownership from * @fd: an fd to take ownership from
@ -148,6 +177,13 @@ sysprof_capture_reader_new_from_fd (int fd,
else else
self->endian = G_BIG_ENDIAN; self->endian = G_BIG_ENDIAN;
/* If we detect a capture file that did not get an end time, or an erroneous
* end time, then we need to take a performance hit here and scan the file
* and discover the end time with frame timings.
*/
if (self->header.end_time < self->header.time)
sysprof_capture_reader_discover_end_time (self);
return self; return self;
} }