github.com/likebike/go--@v0.0.0-20190911215757-0bd925d16e96/go/misc/cgo/testcarchive/main6.c (about)

     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  }