Module: Kernel

Defined in:
(unknown)

Instance Method Summary collapse

Instance Method Details

#exec_trace ⇒ Object

Global function that begins tracing



224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
 
# File 'ext/exec_trace.c', line 224

VALUE
exec_trace(VALUE self)
{
  // Capture current thread ID to ensure we don't capture frames from other
  // threads.
  tracer.thread = rb_thread_current();

  // Start listening for call events
  rb_add_event_hook((rb_event_hook_func_t)trace_hook,
                    RUBY_EVENT_CALL | RUBY_EVENT_C_CALL | RUBY_EVENT_RETURN |
                      RUBY_EVENT_C_RETURN,
                    Qnil);

  // Call passed in block, ensure trace hook is removed
  rb_ensure(rb_yield, Qnil, exec_trace_ensure, self);

  VALUE top_level_frame_ary = rb_ary_new();

  for (uint64_t i = 0; i < tracer.top_frame_used; i++) {
    VALUE frame_ary = rb_ary_new();
    create_frame_array(frame_ary, tracer.top_frames[i]);
    rb_ary_push(top_level_frame_ary, frame_ary);

    // Cleanup malloc'd memory
    cleanup(tracer.top_frames[i]);
  }

  // Cleanup for another run
  tracer.top_frame_used = 0;
  tracer.last_frame = NULL;
  memset(tracer.top_frames, 0, sizeof(tracer.top_frames));

  return top_level_frame_ary;
}