46 lines · cpp
1// Test basic realloc functionality.2// RUN: %clang_hwasan %s -o %t && %run %t3// RUN: %clang_hwasan %s -DREALLOCARRAY -o %t && %run %t4 5#include <assert.h>6#include <sanitizer/hwasan_interface.h>7#include <stdlib.h>8 9#ifdef REALLOCARRAY10extern "C" void *reallocarray(void *, size_t nmemb, size_t size);11#define REALLOC(p, s) reallocarray(p, 1, s)12#else13#define REALLOC(p, s) realloc(p, s)14#endif15 16int main() {17 __hwasan_enable_allocator_tagging();18 char *x = (char*)REALLOC(nullptr, 4);19 x[0] = 10;20 x[1] = 20;21 x[2] = 30;22 x[3] = 40;23 char *x1 = (char*)REALLOC(x, 5);24 assert(x1 != x); // not necessary true for C,25 // but true today for hwasan.26 assert(x1[0] == 10 && x1[1] == 20 && x1[2] == 30 && x1[3] == 40);27 x1[4] = 50;28 29 char *x2 = (char*)REALLOC(x1, 6);30 x2[5] = 60;31 assert(x2 != x1);32 assert(x2[0] == 10 && x2[1] == 20 && x2[2] == 30 && x2[3] == 40 &&33 x2[4] == 50 && x2[5] == 60);34 35 char *x3 = (char*)REALLOC(x2, 6);36 assert(x3 != x2);37 assert(x3[0] == 10 && x3[1] == 20 && x3[2] == 30 && x3[3] == 40 &&38 x3[4] == 50 && x3[5] == 60);39 40 char *x4 = (char*)REALLOC(x3, 5);41 assert(x4 != x3);42 assert(x4[0] == 10 && x4[1] == 20 && x4[2] == 30 && x4[3] == 40 &&43 x4[4] == 50);44 free(x4);45}46