43 lines · cpp
1// RUN: %clangxx_msan -O0 %s -o %t && %run %t2 3// Check that strlen() and similar intercepted functions can be called on shadow4// memory.5// The mem_to_shadow's part might need rework6// XFAIL: target={{.*freebsd.*}}7 8#include <assert.h>9#include <stdint.h>10#include <stdio.h>11#include <string.h>12#include <stdlib.h>13#include "test.h"14 15const char *mem_to_shadow(const char *p) {16#if defined(__x86_64__)17 return (char *)((uintptr_t)p ^ 0x500000000000ULL);18#elif defined(__loongarch_lp64)19 return (char *)((uintptr_t)p ^ 0x500000000000ULL);20#elif defined (__mips64)21 return (char *)((uintptr_t)p ^ 0x8000000000ULL);22#elif defined(__powerpc64__)23#define LINEARIZE_MEM(mem) \24 (((uintptr_t)(mem) & ~0x200000000000ULL) ^ 0x100000000000ULL)25 return (char *)(LINEARIZE_MEM(p) + 0x080000000000ULL);26#elif defined(__s390x__)27 return (char *)(((uintptr_t)p & ~0xC00000000000ULL) + 0x080000000000ULL);28#elif defined(__aarch64__)29 return (char *)((uintptr_t)p ^ 0xB00000000000ULL);30#endif31}32 33int main(void) {34 const char *s = "abcdef";35 assert(strlen(s) == 6);36 assert(strlen(mem_to_shadow(s)) == 0);37 38 char *t = new char[42];39 t[41] = 0;40 assert(strlen(mem_to_shadow(t)) == 41);41 return 0;42}43