go msan5 源码
golang msan5 代码
文件路径：/misc/cgo/testsanitizers/testdata/msan5.go
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
// Using reflect to set a value was not seen by msan.
/*
#include <stdlib.h>
extern void Go1(int*);
extern void Go2(char*);
// Use weak as a hack to permit defining a function even though we use export.
void C1() __attribute__ ((weak));
void C2() __attribute__ ((weak));
void C1() {
int i;
Go1(&i);
if (i != 42) {
abort();
}
}
void C2() {
char a[2];
a[1] = 42;
Go2(a);
if (a[0] != 42) {
abort();
}
}
*/
import "C"
import (
"reflect"
"unsafe"
)
//export Go1
func Go1(p *C.int) {
reflect.ValueOf(p).Elem().Set(reflect.ValueOf(C.int(42)))
}
//export Go2
func Go2(p *C.char) {
a := (*[2]byte)(unsafe.Pointer(p))
reflect.Copy(reflect.ValueOf(a[:1]), reflect.ValueOf(a[1:]))
}
func main() {
C.C1()
C.C2()
}
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