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 #cgo LDFLAGS: -fsanitize=memory 9 #cgo CPPFLAGS: -fsanitize=memory 10 11 #include <string.h> 12 #include <stdint.h> 13 #include <stdlib.h> 14 15 void f(int32_t *p, int n) { 16 int32_t * volatile q = (int32_t *)malloc(sizeof(int32_t) * n); 17 memcpy(p, q, n * sizeof(*p)); 18 free(q); 19 } 20 21 void g(int32_t *p, int n) { 22 if (p[4] != 1) { 23 abort(); 24 } 25 } 26 */ 27 import "C" 28 29 import ( 30 "unsafe" 31 ) 32 33 func main() { 34 a := make([]int32, 10) 35 C.f((*C.int32_t)(unsafe.Pointer(&a[0])), C.int(len(a))) 36 a[4] = 1 37 C.g((*C.int32_t)(unsafe.Pointer(&a[0])), C.int(len(a))) 38 } 39
