0
Files
src/base/stack_canary_linux_unittest.cc
Jose Dapena Paz 7cc1b1d4a7 GCC: also fix StackCanary.ChangingStackCanaryCrashesOnReturn
Create NOOPT compiler specific macro, and use it both in
ResetCanaryAndReturn and in ChangingStackCanaryCrashesOnReturn. For
the latter, it fixes the unit tests in GCC.

Bug: 819294
Change-Id: I1e5e9e4434728c6b1916d43fa4c8225dd71bbcb4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5014023
Reviewed-by: danakj <danakj@chromium.org>
Commit-Queue: José Dapena Paz <jdapena@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1221765}
2023-11-08 18:37:28 +00:00

46 lines
1.5 KiB
C++

// Copyright 2021 The Chromium Authors
// 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 "base/compiler_specific.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 {
NOINLINE NOOPT 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