gcc_stack_darwin.c

     1  // Copyright 2023 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  #include <pthread.h>
     6  #include "libcgo.h"
     7  
     8  void
     9  x_cgo_getstackbound(uintptr bounds[2])
    10  {
    11  	void* addr;
    12  	size_t size;
    13  	pthread_t p;
    14  
    15  	p = pthread_self();
    16  	addr = pthread_get_stackaddr_np(p); // high address (!)
    17  	size = pthread_get_stacksize_np(p);
    18  
    19  	// bounds points into the Go stack. TSAN can't see the synchronization
    20  	// in Go around stack reuse.
    21  	_cgo_tsan_acquire();
    22  	bounds[0] = (uintptr)addr - size;
    23  	bounds[1] = (uintptr)addr;
    24  	_cgo_tsan_release();
    25  }
    26
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