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https://github.com/chromium/crashpad.git
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6a6a0c27ed
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>
108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
// Copyright 2015 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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#ifndef CRASHPAD_SNAPSHOT_WIN_EXCEPTION_SNAPSHOT_WIN_H_
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#define CRASHPAD_SNAPSHOT_WIN_EXCEPTION_SNAPSHOT_WIN_H_
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#include <windows.h>
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#include <stdint.h>
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#include "base/macros.h"
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#include "build/build_config.h"
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#include "snapshot/cpu_context.h"
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#include "snapshot/exception_snapshot.h"
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#include "snapshot/win/thread_snapshot_win.h"
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#include "util/misc/initialization_state_dcheck.h"
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#include "util/stdlib/pointer_container.h"
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#include "util/win/address_types.h"
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#include "util/win/process_structs.h"
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namespace crashpad {
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class ProcessReaderWin;
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namespace internal {
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class MemorySnapshotWin;
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#if defined(ARCH_CPU_X86_FAMILY)
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union CPUContextUnion {
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CPUContextX86 x86;
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CPUContextX86_64 x86_64;
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};
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#endif
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class ExceptionSnapshotWin final : public ExceptionSnapshot {
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public:
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ExceptionSnapshotWin();
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~ExceptionSnapshotWin() override;
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//! \brief Initializes the object.
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//!
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//! \param[in] process_reader A ProcessReader for the process that sustained
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//! the exception.
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//! \param[in] thread_id The thread ID in which the exception occurred.
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//! \param[in] exception_pointers_address The address of an
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//! `EXCEPTION_POINTERS` record in the target process, passed through from
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//! the exception handler.
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//!
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//! \return `true` if the snapshot could be created, `false` otherwise with
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//! an appropriate message logged.
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bool Initialize(ProcessReaderWin* process_reader,
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DWORD thread_id,
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WinVMAddress exception_pointers,
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const PointerVector<internal::ThreadSnapshotWin>& threads);
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// ExceptionSnapshot:
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const CPUContext* Context() const override;
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uint64_t ThreadID() const override;
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uint32_t Exception() const override;
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uint32_t ExceptionInfo() const override;
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uint64_t ExceptionAddress() const override;
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const std::vector<uint64_t>& Codes() const override;
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std::vector<const MemorySnapshot*> ExtraMemory() const override;
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private:
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template <class ExceptionRecordType,
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class ExceptionPointersType,
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class ContextType>
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bool InitializeFromExceptionPointers(
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const ProcessReaderWin& process_reader,
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WinVMAddress exception_pointers_address,
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const PointerVector<internal::ThreadSnapshotWin>& threads,
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void (*native_to_cpu_context)(const ContextType& context_record,
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CPUContext* context,
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CPUContextUnion* context_union));
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#if defined(ARCH_CPU_X86_FAMILY)
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CPUContextUnion context_union_;
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#endif
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CPUContext context_;
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std::vector<uint64_t> codes_;
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PointerVector<internal::MemorySnapshotWin> extra_memory_;
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uint64_t thread_id_;
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uint64_t exception_address_;
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uint32_t exception_flags_;
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DWORD exception_code_;
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InitializationStateDcheck initialized_;
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DISALLOW_COPY_AND_ASSIGN(ExceptionSnapshotWin);
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};
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} // namespace internal
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} // namespace crashpad
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#endif // CRASHPAD_SNAPSHOT_WIN_EXCEPTION_SNAPSHOT_WIN_H_
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