
The methodology used to generate this CL is documented in https://crbug.com/1098010#c34. An earlier version of this CL, https://crrev.com/c/3879904, was reverted due to an issue that was resolved with https://crrev.com/c/3881211. No-Try: true Bug: 1098010 Change-Id: Ibd6ffb97e66835bc299fe7b85876c3e2927b2345 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3883841 Auto-Submit: Avi Drissman <avi@chromium.org> Owners-Override: Avi Drissman <avi@chromium.org> Reviewed-by: Mark Mentovai <mark@chromium.org> Commit-Queue: Mark Mentovai <mark@chromium.org> Cr-Commit-Position: refs/heads/main@{#1044747}
45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
// Copyright 2021 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/stack_canary_linux.h"
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#include "build/build_config.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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#if defined(LIBC_GLIBC) && \
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(defined(ARCH_CPU_ARM_FAMILY) || defined(ARCH_CPU_X86_FAMILY))
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namespace {
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__attribute__((noinline, optnone)) void ResetCanaryAndReturn() {
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// Create a buffer >=8 bytes to force the stack protector on this function,
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// which should work as long as -fno-stack-protector isn't passed in the
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// default options. We compile this file with -fstack-protector-all, but it
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// may be overridden with -fstack-protector or -fstack-protector-strong.
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[[maybe_unused]] char buffer[10];
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ResetStackCanaryIfPossible();
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}
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} // namespace
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// Essentially tests that ResetStackCanaryIfPossible() changes the
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// actual reference canary that is checked in the function prologue.
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TEST(StackCanary, ChangingStackCanaryCrashesOnReturn) {
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ASSERT_DEATH(ResetCanaryAndReturn(), "stack smashing");
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}
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#if !defined(NDEBUG)
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// Tests that the useful debug message works--specifically that on death, it
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// prints out the bug URL with useful information.
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TEST(StackCanary, ChangingStackCanaryPrintsDebugMessage) {
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SetStackSmashingEmitsDebugMessage();
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ASSERT_DEATH(ResetCanaryAndReturn(), "crbug\\.com/1206626");
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}
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#endif // !defined(NDEBUG)
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#endif // defined(LIBC_GLIBC) && (defined(ARCH_CPU_ARM_FAMILY) ||
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// defined(ARCH_CPU_X86_FAMILY))
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} // namespace base
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