1// RUN: %clangxx_msan -O0 %s -o %t && %run %t
2
3// Check that strlen() and similar intercepted functions can be called on shadow
4// memory.
5
6#include <assert.h>
7#include <stdint.h>
8#include <stdio.h>
9#include <string.h>
10#include <stdlib.h>
11#include "test.h"
12
13const char *mem_to_shadow(const char *p) {
14#if defined(__x86_64__)
15  return (char *)((uintptr_t)p ^ 0x500000000000ULL);
16#elif defined (__mips64)
17  return (char *)((uintptr_t)p & ~0x4000000000ULL);
18#elif defined(__powerpc64__)
19#define LINEARIZE_MEM(mem) \
20  (((uintptr_t)(mem) & ~0x200000000000ULL) ^ 0x100000000000ULL)
21  return (char *)(LINEARIZE_MEM(p) + 0x080000000000ULL);
22#elif defined(__aarch64__)
23  return (char *)((uintptr_t)p ^ 0x6000000000ULL);
24#endif
25}
26
27int main(void) {
28  const char *s = "abcdef";
29  assert(strlen(s) == 6);
30  assert(strlen(mem_to_shadow(s)) == 0);
31
32  char *t = new char[42];
33  t[41] = 0;
34  assert(strlen(mem_to_shadow(t)) == 41);
35  return 0;
36}
37