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Adds a new client API which allows causing an exception in another process. This is accomplished by injecting a thread that calls RaiseException(). A special exception code is used that indicates to the handler that the exception arguments contain a thread id and exception code, which are in turn used to fabricate an exception record. This is so that the API can allow the client to "blame" a particular thread in the target process. The target process must also be a registered Crashpad client, as the normal exception mechanism is used to handle the exception. The injection of a thread is used instead of DebugBreakProcess() which does not cause the UnhandledExceptionFilter() to be executed. NtCreateThreadEx() is used in lieu of CreateRemoteThread() as it allows passing of a flag which avoids calling DllMain()s. This is necessary to allow thread creation to succeed even when the target process is deadlocked on the loader lock. BUG=crashpad:103 Change-Id: I797007bd2b1e3416afe3f37a6566c0cdb259b106 Reviewed-on: https://chromium-review.googlesource.com/339263 Reviewed-by: Mark Mentovai <mark@chromium.org>
29 lines
1.0 KiB
C++
29 lines
1.0 KiB
C++
// Copyright 2016 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 <windows.h>
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// This program intentionally blocks in DllMain which is executed with the
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// loader lock locked. This allows us to test that
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// CrashpadClient::DumpAndCrashTargetProcess() can still dump the target in this
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// case.
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BOOL WINAPI DllMain(HINSTANCE, DWORD reason, LPVOID) {
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switch (reason) {
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case DLL_PROCESS_DETACH:
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case DLL_THREAD_DETACH:
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Sleep(INFINITE);
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}
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return TRUE;
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}
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