Index: source/Plugins/Process/Windows/Common/ExceptionRecord.h =================================================================== --- source/Plugins/Process/Windows/Common/ExceptionRecord.h +++ source/Plugins/Process/Windows/Common/ExceptionRecord.h @@ -66,6 +66,8 @@ lldb::tid_t GetThreadID() const { return m_thread_id; } + const std::vector& GetExceptionArguments() const { return m_arguments; } + private: DWORD m_code; bool m_continuable; Index: source/Plugins/Process/Windows/Common/ProcessWindows.cpp =================================================================== --- source/Plugins/Process/Windows/Common/ProcessWindows.cpp +++ source/Plugins/Process/Windows/Common/ProcessWindows.cpp @@ -476,6 +476,74 @@ RefreshStateAfterStop(); } +static void +DumpAdditionalExceptionInformation(llvm::raw_ostream &stream, + const ExceptionRecordSP &exception) { + // Decode additional exception information for specific exception types based + // on + // https://docs.microsoft.com/en-us/windows/desktop/api/winnt/ns-winnt-_exception_record + + const int addr_min_width = 2 + 8; // "0x" + 4 address bytes + + const std::vector &args = exception->GetExceptionArguments(); + switch (exception->GetExceptionCode()) { + case EXCEPTION_ACCESS_VIOLATION: { + if (args.size() < 2) + break; + + stream << ": "; + const int access_violation_code = args[0]; + const lldb::addr_t access_violation_address = args[1]; + switch (access_violation_code) { + case 0: + stream << "Access violation reading"; + break; + case 1: + stream << "Access violation writing"; + break; + case 8: + stream << "User-mode data execution prevention (DEP) violation at"; + break; + default: + stream << "Unknown access violation (code " << access_violation_code + << ") at"; + break; + } + stream << " location " + << llvm::format_hex(access_violation_address, addr_min_width); + break; + } + case EXCEPTION_IN_PAGE_ERROR: { + if (args.size() < 3) + break; + + stream << ": "; + const int page_load_error_code = args[0]; + const lldb::addr_t page_load_error_address = args[1]; + const DWORD underlying_code = args[2]; + switch (page_load_error_code) { + case 0: + stream << "In page error reading"; + break; + case 1: + stream << "In page error writing"; + break; + case 8: + stream << "User-mode data execution prevention (DEP) violation at"; + break; + default: + stream << "Unknown page loading error (code " << page_load_error_code + << ") at"; + break; + } + stream << " location " + << llvm::format_hex(page_load_error_address, addr_min_width) + << " (status code " << llvm::format_hex(underlying_code, 8) << ")"; + break; + } + } +} + void ProcessWindows::RefreshStateAfterStop() { Log *log = ProcessWindowsLog::GetLogIfAny(WINDOWS_LOG_EXCEPTION); llvm::sys::ScopedLock lock(m_mutex); @@ -575,6 +643,8 @@ << llvm::format_hex(active_exception->GetExceptionCode(), 8) << " encountered at address " << llvm::format_hex(active_exception->GetExceptionAddress(), 8); + DumpAdditionalExceptionInformation(desc_stream, active_exception); + stop_info = StopInfo::CreateStopReasonWithException( *stop_thread, desc_stream.str().c_str()); stop_thread->SetStopInfo(stop_info);