22 lines · cpp
1// RUN: %clangxx_asan -O0 %s -o %t2// Default is true (free on realloc to 0 size)3// RUN: %run %t 2>&1 | FileCheck %s4// RUN: %env_asan_opts=allocator_frees_and_returns_null_on_realloc_zero=true %run %t 2>&1 | FileCheck %s5// RUN: %env_asan_opts=allocator_frees_and_returns_null_on_realloc_zero=false %run %t 2>&1 | FileCheck %s --check-prefix=NO-FREE6 7#include <stdio.h>8#include <stdlib.h>9 10int main() {11 void *p = malloc(42);12 p = realloc(p, 0);13 if (p) {14 // NO-FREE: Allocated something on realloc(p, 0)15 fprintf(stderr, "Allocated something on realloc(p, 0)\n");16 } else {17 // CHECK: realloc(p, 0) returned nullptr18 fprintf(stderr, "realloc(p, 0) returned nullptr\n");19 }20 free(p);21}22