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https://github.com/golang/go
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e7ee268292
The -msan option compiles Go code to use the memory sanitizer. This is intended for use when linking with C/C++ code compiled with -fsanitize=memory. When memory blocks are passed back and forth between C/C++ and Go, code in both languages will agree as to whether the memory is correctly initialized or not, and will report errors for any use of uninitialized memory. Change-Id: I2dbdbd26951eacb7d84063cfc7297f88ffadd70c Reviewed-on: https://go-review.googlesource.com/16169 Reviewed-by: David Crawshaw <crawshaw@golang.org>
32 lines
484 B
Go
32 lines
484 B
Go
package main
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/*
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#include <string.h>
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#include <stdint.h>
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#include <stdlib.h>
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void f(int32_t *p, int n) {
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int32_t * volatile q = (int32_t *)malloc(sizeof(int32_t) * n);
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memcpy(p, q, n * sizeof(*p));
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free(q);
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}
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void g(int32_t *p, int n) {
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if (p[4] != 1) {
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abort();
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}
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}
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*/
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import "C"
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import (
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"unsafe"
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)
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func main() {
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a := make([]int32, 10)
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C.f((*C.int32_t)(unsafe.Pointer(&a[0])), C.int(len(a)))
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a[4] = 1
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C.g((*C.int32_t)(unsafe.Pointer(&a[0])), C.int(len(a)))
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}
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