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      1 // Copyright 2015 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 package main
      6 
      7 /*
      8 #include <string.h>
      9 #include <stdint.h>
     10 #include <stdlib.h>
     11 
     12 void f(int32_t *p, int n) {
     13   int32_t * volatile q = (int32_t *)malloc(sizeof(int32_t) * n);
     14   memcpy(p, q, n * sizeof(*p));
     15   free(q);
     16 }
     17 
     18 void g(int32_t *p, int n) {
     19   if (p[4] != 1) {
     20     abort();
     21   }
     22 }
     23 */
     24 import "C"
     25 
     26 import (
     27 	"unsafe"
     28 )
     29 
     30 func main() {
     31 	a := make([]int32, 10)
     32 	C.f((*C.int32_t)(unsafe.Pointer(&a[0])), C.int(len(a)))
     33 	a[4] = 1
     34 	C.g((*C.int32_t)(unsafe.Pointer(&a[0])), C.int(len(a)))
     35 }
     36