1  // Copyright 2016 The Go Authors. All rights reserved.
       2  // Use of this source code is governed by a BSD-style
       3  // license that can be found in the LICENSE file.
       4  
       5  // Test that using the Go profiler in a C program does not crash.
       6  
       7  #include <stddef.h>
       8  #include <sys/time.h>
       9  
      10  #include "libgo6.h"
      11  
      12  int main(int argc, char **argv) {
      13  	struct timeval tvstart, tvnow;
      14  	int diff;
      15  
      16  	gettimeofday(&tvstart, NULL);
      17  
      18  	go_start_profile();
      19  
      20  	// Busy wait so we have something to profile.
      21  	// If we just sleep the profiling signal will never fire.
      22  	while (1) {
      23  		gettimeofday(&tvnow, NULL);
      24  		diff = (tvnow.tv_sec - tvstart.tv_sec) * 1000 * 1000 + (tvnow.tv_usec - tvstart.tv_usec);
      25  
      26  		// Profile frequency is 100Hz so we should definitely
      27  		// get a signal in 50 milliseconds.
      28  		if (diff > 50 * 1000)
      29  			break;
      30  	}
      31  
      32  	go_stop_profile();
      33  	return 0;
      34  }