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 mem_to_shadow(const char * p)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 main(void)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