15d71de26cedae3dafc17449fe0182045c0bd20e8Stephen Hines// RUN: %clang_cl_asan -O0 %s -Fe%t 22d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// RUN: not %run %t 2>&1 | FileCheck %s 32d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 42d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <malloc.h> 52d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 62d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint main() { 72d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *buffer = (char*)realloc(0, 42); 82d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines buffer[-1] = 42; 92d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// CHECK: AddressSanitizer: heap-buffer-overflow on address [[ADDR:0x[0-9a-f]+]] 102d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// CHECK: WRITE of size 1 at [[ADDR]] thread T0 112d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// CHECK-NEXT: {{#0 .* main .*realloc_left_oob.cc}}:[[@LINE-3]] 122d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// CHECK: [[ADDR]] is located 1 bytes to the left of 42-byte region 132d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// CHECK: allocated by thread T0 here: 142d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// CHECK-NEXT: {{#0 .* realloc }} 152d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// CHECK-NEXT: {{#1 .* main .*realloc_left_oob.cc}}:[[@LINE-8]] 162d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines free(buffer); 172d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 18