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// RUN: %clangxx_asan -O0 %s -o %t
// Default is true (free on realloc to 0 size)
// RUN: %run %t 2>&1 | FileCheck %s
// RUN: %env_asan_opts=allocator_frees_and_returns_null_on_realloc_zero=true %run %t 2>&1 | FileCheck %s
// RUN: %env_asan_opts=allocator_frees_and_returns_null_on_realloc_zero=false %run %t 2>&1 | FileCheck %s --check-prefix=NO-FREE
#include <stdio.h>
#include <stdlib.h>
int main() {
void *p = malloc(42);
p = realloc(p, 0);
if (p) {
// NO-FREE: Allocated something on realloc(p, 0)
fprintf(stderr, "Allocated something on realloc(p, 0)\n");
} else {
// CHECK: realloc(p, 0) returned nullptr
fprintf(stderr, "realloc(p, 0) returned nullptr\n");
}
free(p);
}
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