1 // RUN: %clang_cl_asan -O0 %s -Fe%t 2 // RUN: not %run %t 2>&1 | FileCheck %s 3 4 #include <malloc.h> 5 6 int main() { 7 char *buffer = (char*)realloc(0, 32), 8 *stale = buffer; 9 buffer = (char*)realloc(buffer, 64); 10 // The 'stale' may now point to a free'd memory. 11 stale[0] = 42; 12 // CHECK: AddressSanitizer: heap-use-after-free on address [[ADDR:0x[0-9a-f]+]] 13 // CHECK: WRITE of size 1 at [[ADDR]] thread T0 14 // CHECK-NEXT: {{#0 .* main .*use_after_realloc.cc}}:[[@LINE-3]] 15 // CHECK: [[ADDR]] is located 0 bytes inside of 32-byte region 16 // CHECK: freed by thread T0 here: 17 // CHECK-NEXT: {{#0 .* realloc }} 18 // CHECK-NEXT: {{#1 .* main .*use_after_realloc.cc}}:[[@LINE-9]] 19 // CHECK: previously allocated by thread T0 here: 20 // CHECK-NEXT: {{#0 .* realloc }} 21 // CHECK-NEXT: {{#1 .* main .*use_after_realloc.cc}}:[[@LINE-14]] 22 free(buffer); 23 } 24
