msan2_cmsan.go

     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
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