| 1 | //===-- ExceptionRecord.h ---------------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef liblldb_Plugins_Process_Windows_ExceptionRecord_H_ |
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| 10 | #define liblldb_Plugins_Process_Windows_ExceptionRecord_H_ |
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| 11 | |
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| 12 | #include "lldb/Host/windows/windows.h" |
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| 13 | #include "lldb/lldb-forward.h" |
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| 14 | #include <dbghelp.h> |
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| 15 | |
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| 16 | #include <memory> |
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| 17 | #include <vector> |
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| 18 | |
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| 19 | namespace lldb_private { |
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| 20 | |
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| 21 | // ExceptionRecord |
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| 22 | // |
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| 23 | // ExceptionRecord defines an interface which allows implementors to receive |
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| 24 | // notification of events that happen in a debugged process. |
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| 25 | class ExceptionRecord { |
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| 26 | public: |
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| 27 | ExceptionRecord(const EXCEPTION_RECORD &record, lldb::tid_t thread_id) { |
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| 28 | // Notes about the `record.ExceptionRecord` field: |
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| 29 | // In the past, some code tried to parse the nested exception with it, but |
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| 30 | // in practice, that code just causes Access Violation. I suspect |
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| 31 | // `ExceptionRecord` here actually points to the address space of the |
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| 32 | // debuggee process. However, I did not manage to find any official or |
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| 33 | // unofficial reference that clarifies this point. If anyone would like to |
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| 34 | // reimplement this, please also keep in mind to check how this behaves when |
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| 35 | // debugging a WOW64 process. I suspect you may have to use the explicit |
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| 36 | // `EXCEPTION_RECORD32` and `EXCEPTION_RECORD64` structs. |
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| 37 | m_code = record.ExceptionCode; |
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| 38 | m_continuable = (record.ExceptionFlags == 0); |
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| 39 | m_exception_addr = reinterpret_cast<lldb::addr_t>(record.ExceptionAddress); |
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| 40 | m_thread_id = thread_id; |
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| 41 | m_arguments.assign(record.ExceptionInformation, |
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| 42 | record.ExceptionInformation + record.NumberParameters); |
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| 43 | } |
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| 44 | |
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| 45 | // MINIDUMP_EXCEPTIONs are almost identical to EXCEPTION_RECORDs. |
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| 46 | ExceptionRecord(const MINIDUMP_EXCEPTION &record, lldb::tid_t thread_id) |
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| 47 | : m_code(record.ExceptionCode), m_continuable(record.ExceptionFlags == 0), |
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| 48 | m_exception_addr(static_cast<lldb::addr_t>(record.ExceptionAddress)), |
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| 49 | m_thread_id(thread_id), |
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| 50 | m_arguments(record.ExceptionInformation, |
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| 51 | record.ExceptionInformation + record.NumberParameters) {} |
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| 52 | |
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| 53 | virtual ~ExceptionRecord() {} |
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| 54 | |
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| 55 | DWORD |
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| 56 | GetExceptionCode() const { return m_code; } |
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| 57 | bool IsContinuable() const { return m_continuable; } |
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| 58 | lldb::addr_t GetExceptionAddress() const { return m_exception_addr; } |
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| 59 | |
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| 60 | lldb::tid_t GetThreadID() const { return m_thread_id; } |
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| 61 | |
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| 62 | const std::vector<ULONG_PTR>& GetExceptionArguments() const { return m_arguments; } |
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| 63 | |
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| 64 | private: |
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| 65 | DWORD m_code; |
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| 66 | bool m_continuable; |
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| 67 | lldb::addr_t m_exception_addr; |
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| 68 | lldb::tid_t m_thread_id; |
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| 69 | std::vector<ULONG_PTR> m_arguments; |
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| 70 | }; |
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| 71 | } |
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| 72 | |
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| 73 | #endif |
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| 74 | |
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