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359fc4a133
This CL adds code to check if the current thread holds the DLL loader lock. This code can be used to enforce the requirement that certain parts of crashpad, such as process creation are not done during calls to DllMain which can lead to deadlocks and crashes. Only one check is current enforced, in client process creation, and only in debug builds. Bug: crashpad: 316 Change-Id: I5757a264bbf28ce2ab88a0cd7ac9481e46428c17 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/1945993 Reviewed-by: Mark Mentovai <mark@chromium.org> Reviewed-by: Scott Graham <scottmg@chromium.org> Commit-Queue: James Forshaw <forshaw@chromium.org>
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
// Copyright 2019 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/win/loader_lock.h"
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#include <windows.h>
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#include "build/build_config.h"
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#include "util/win/process_structs.h"
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namespace crashpad {
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namespace {
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#ifdef ARCH_CPU_64_BITS
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using NativeTraits = process_types::internal::Traits64;
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#else
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using NativeTraits = process_types::internal::Traits32;
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#endif // ARCH_CPU_64_BITS
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using PEB = process_types::PEB<NativeTraits>;
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using TEB = process_types::TEB<NativeTraits>;
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using RTL_CRITICAL_SECTION = process_types::RTL_CRITICAL_SECTION<NativeTraits>;
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TEB* GetTeb() {
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return reinterpret_cast<TEB*>(NtCurrentTeb());
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}
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PEB* GetPeb() {
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return reinterpret_cast<PEB*>(GetTeb()->ProcessEnvironmentBlock);
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}
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} // namespace
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bool IsThreadInLoaderLock() {
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RTL_CRITICAL_SECTION* loader_lock =
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reinterpret_cast<RTL_CRITICAL_SECTION*>(GetPeb()->LoaderLock);
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return loader_lock->OwningThread == GetTeb()->ClientId.UniqueThread;
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}
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} // namespace crashpad
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