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libsysprof-capture: add collector interface for samples

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This commit is contained in:
Christian Hergert
2020-03-05 15:26:31 -08:00
parent b33c3e8af9
commit 43f31fb8b7
2 changed files with 37 additions and 0 deletions
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34
src/libsysprof-capture/sysprof-collector.c
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@ -364,3 +364,37 @@ sysprof_collector_allocate (SysprofCaptureAddress alloc_addr,
} COLLECTOR_END;
}
void
sysprof_collector_sample (SysprofBacktraceFunc backtrace_func,
gpointer backtrace_data)
{
COLLECTOR_BEGIN {
SysprofCaptureSample *ev;
gsize len;
len = sizeof *ev + (sizeof (SysprofCaptureSample) * MAX_UNWIND_DEPTH);
if ((ev = mapped_ring_buffer_allocate (collector->buffer, len)))
{
gint n_addrs;
/* See comment from sysprof_collector_allocate(). */
if (backtrace_func)
n_addrs = backtrace_func (ev->addrs, MAX_UNWIND_DEPTH, backtrace_data);
else
n_addrs = 0;
ev->n_addrs = CLAMP (n_addrs, 0, MAX_UNWIND_DEPTH);
ev->frame.len = sizeof *ev + sizeof (SysprofCaptureAddress) * ev->n_addrs;
ev->frame.type = SYSPROF_CAPTURE_FRAME_SAMPLE;
ev->frame.cpu = _do_getcpu ();
ev->frame.pid = collector->pid;
ev->frame.time = SYSPROF_CAPTURE_CURRENT_TIME;
ev->tid = collector->tid;
mapped_ring_buffer_advance (collector->buffer, ev->frame.len);
}
} COLLECTOR_END;
}

3
src/libsysprof-capture/sysprof-collector.h
View File

@ -68,5 +68,8 @@ void sysprof_collector_allocate (SysprofCaptureAddress
gint64 alloc_size,
SysprofBacktraceFunc backtrace_func,
gpointer backtrace_data);
SYSPROF_AVAILABLE_IN_3_36
void sysprof_collector_sample (SysprofBacktraceFunc backtrace_func,
gpointer backtrace_data);
G_END_DECLS