// Copyright (C) 2012 The Android Open Source Project // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions // are met: // 1. Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // 2. Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the distribution. // 3. Neither the name of the project nor the names of its contributors // may be used to endorse or promote products derived from this software // without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE // ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS // OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF // SUCH DAMAGE. //===----------------------------------------------------------------------===// // // The LLVM Compiler Infrastructure // // This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. // // // This file implements the "Exception Handling APIs" // http://www.codesourcery.com/public/cxx-abi/abi-eh.html // http://www.intel.com/design/itanium/downloads/245358.htm // //===----------------------------------------------------------------------===// #include #include #include #include #include #include "cxxabi_defines.h" #include "dwarf_helper.h" #include "helper_func_internal.h" namespace __cxxabiv1 { /* * Personality Routine */ extern "C" _Unwind_Reason_Code BEGIN_DEFINE_PERSONALITY_FUNC if (version != 1 || unwind_exception == 0 || context == 0) { return _URC_FATAL_PHASE1_ERROR; } bool native_exception = exceptionClass == __gxx_exception_class; ScanResultInternal results; /* * Phase 1: Search */ if (actions & _UA_SEARCH_PHASE) { scanEHTable(results, actions, native_exception, unwind_exception, context); if (results.reason == _URC_HANDLER_FOUND) { // Found one. Cache result for phase 2. if (native_exception) { __cxa_exception* exception_header = reinterpret_cast<__cxa_exception*>(unwind_exception+1)-1; exception_header->handlerSwitchValue = static_cast(results.ttypeIndex); exception_header->actionRecord = results.actionRecord; exception_header->languageSpecificData = results.languageSpecificData; exception_header->catchTemp = reinterpret_cast(results.landingPad); exception_header->adjustedPtr = results.adjustedPtr; saveDataToBarrierCache(unwind_exception, context, results); } return _URC_HANDLER_FOUND; } return continueUnwinding(unwind_exception, context); } /* * Phase 2: Cleanup */ if (actions & _UA_CLEANUP_PHASE) { if (actions & _UA_HANDLER_FRAME) { if (native_exception) { // We have cached on phase 1. Just recall that. __cxa_exception* exception_header = reinterpret_cast<__cxa_exception*>(unwind_exception+1)-1; results.ttypeIndex = exception_header->handlerSwitchValue; results.actionRecord = exception_header->actionRecord; results.languageSpecificData = exception_header->languageSpecificData; results.landingPad = reinterpret_cast(exception_header->catchTemp); results.adjustedPtr = exception_header->adjustedPtr; loadDataFromBarrierCache(unwind_exception, results); } else { scanEHTable(results, actions, native_exception, unwind_exception, context); if (results.reason != _URC_HANDLER_FOUND) call_terminate(unwind_exception); } setRegisters(unwind_exception, context, results); saveUnexpectedDataToBarrierCache(unwind_exception, context, results); return _URC_INSTALL_CONTEXT; } // Force unwinding or no handler found scanEHTable(results, actions, native_exception, unwind_exception, context); if (results.reason == _URC_HANDLER_FOUND) { // Found a non-catching handler. Jump to it. setRegisters(unwind_exception, context, results); prepareBeginCleanup(unwind_exception); return _URC_INSTALL_CONTEXT; } return continueUnwinding(unwind_exception, context); } // Why here? Neither phase 1 nor 2. return _URC_FATAL_PHASE1_ERROR; } } // namespace __cxxabiv1