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- // Copyright 2021 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "base/stack_canary_linux.h"
- #include "build/build_config.h"
- #include "testing/gtest/include/gtest/gtest.h"
- namespace base {
- #if defined(LIBC_GLIBC) && \
- (defined(ARCH_CPU_ARM_FAMILY) || defined(ARCH_CPU_X86_FAMILY))
- namespace {
- __attribute__((noinline, optnone)) void ResetCanaryAndReturn() {
- // Create a buffer >=8 bytes to force the stack protector on this function,
- // which should work as long as -fno-stack-protector isn't passed in the
- // default options. We compile this file with -fstack-protector-all, but it
- // may be overridden with -fstack-protector or -fstack-protector-strong.
- [[maybe_unused]] char buffer[10];
- ResetStackCanaryIfPossible();
- }
- } // namespace
- // Essentially tests that ResetStackCanaryIfPossible() changes the
- // actual reference canary that is checked in the function prologue.
- TEST(StackCanary, ChangingStackCanaryCrashesOnReturn) {
- ASSERT_DEATH(ResetCanaryAndReturn(), "stack smashing");
- }
- #if !defined(NDEBUG)
- // Tests that the useful debug message works--specifically that on death, it
- // prints out the bug URL with useful information.
- TEST(StackCanary, ChangingStackCanaryPrintsDebugMessage) {
- SetStackSmashingEmitsDebugMessage();
- ASSERT_DEATH(ResetCanaryAndReturn(), "crbug\\.com/1206626");
- }
- #endif // !defined(NDEBUG)
- #endif // defined(LIBC_GLIBC) && (defined(ARCH_CPU_ARM_FAMILY) ||
- // defined(ARCH_CPU_X86_FAMILY))
- } // namespace base
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