From b094d6c4bf572654a031ecc4afe675154c886dc5 Mon Sep 17 00:00:00 2001 From: Jing Yu Date: Thu, 22 Jul 2010 14:03:48 -0700 Subject: commit gcc-4.4.3 which is used to build gcc-4.4.3 Android toolchain in master. The source is based on fsf gcc-4.4.3 and contains local patches which are recorded in gcc-4.4.3/README.google. Change-Id: Id8c6d6927df274ae9749196a1cc24dbd9abc9887 --- gcc-4.4.3/libstdc++-v3/libsupc++/eh_arm.cc | 178 +++++++++++++++++++++++++++++ 1 file changed, 178 insertions(+) create mode 100644 gcc-4.4.3/libstdc++-v3/libsupc++/eh_arm.cc (limited to 'gcc-4.4.3/libstdc++-v3/libsupc++/eh_arm.cc') diff --git a/gcc-4.4.3/libstdc++-v3/libsupc++/eh_arm.cc b/gcc-4.4.3/libstdc++-v3/libsupc++/eh_arm.cc new file mode 100644 index 000000000..58997cc17 --- /dev/null +++ b/gcc-4.4.3/libstdc++-v3/libsupc++/eh_arm.cc @@ -0,0 +1,178 @@ +// -*- C++ -*- ARM specific Exception handling support routines. +// Copyright (C) 2004, 2005, 2008, 2009 Free Software Foundation, Inc. +// +// This file is part of GCC. +// +// GCC is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 3, or (at your option) +// any later version. +// +// GCC is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// Under Section 7 of GPL version 3, you are granted additional +// permissions described in the GCC Runtime Library Exception, version +// 3.1, as published by the Free Software Foundation. +// +// You should have received a copy of the GNU General Public License and +// a copy of the GCC Runtime Library Exception along with this program; +// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +// . + +#include +#include "unwind-cxx.h" + +#ifdef __ARM_EABI_UNWINDER__ + +using namespace __cxxabiv1; + + +// Given the thrown type THROW_TYPE, pointer to a variable containing a +// pointer to the exception object THROWN_PTR_P and a type CATCH_TYPE to +// compare against, return whether or not there is a match and if so, +// update *THROWN_PTR_P. + +extern "C" __cxa_type_match_result +__cxa_type_match(_Unwind_Exception* ue_header, + const std::type_info* catch_type, + bool is_reference __attribute__((__unused__)), + void** thrown_ptr_p) +{ + bool forced_unwind = __is_gxx_forced_unwind_class(ue_header->exception_class); + bool foreign_exception = !forced_unwind && !__is_gxx_exception_class(ue_header->exception_class); + bool dependent_exception = + __is_dependent_exception(ue_header->exception_class); + __cxa_exception* xh = __get_exception_header_from_ue(ue_header); + __cxa_dependent_exception *dx = __get_dependent_exception_from_ue(ue_header); + const std::type_info* throw_type; + + if (forced_unwind) + throw_type = &typeid(abi::__forced_unwind); + else if (foreign_exception) + throw_type = &typeid(abi::__foreign_exception); + else if (dependent_exception) + throw_type = __get_exception_header_from_obj + (dx->primaryException)->exceptionType; + else + throw_type = xh->exceptionType; + + void* thrown_ptr = *thrown_ptr_p; + + // Pointer types need to adjust the actual pointer, not + // the pointer to pointer that is the exception object. + // This also has the effect of passing pointer types + // "by value" through the __cxa_begin_catch return value. + if (throw_type->__is_pointer_p()) + thrown_ptr = *(void**) thrown_ptr; + + if (catch_type->__do_catch(throw_type, &thrown_ptr, 1)) + { + *thrown_ptr_p = thrown_ptr; + + if (typeid(*catch_type) == typeid (typeid(void*))) + { + const __pointer_type_info *catch_pointer_type = + static_cast (catch_type); + const __pointer_type_info *throw_pointer_type = + static_cast (throw_type); + + if (typeid (*catch_pointer_type->__pointee) != typeid (void) + && (*catch_pointer_type->__pointee != + *throw_pointer_type->__pointee)) + return ctm_succeeded_with_ptr_to_base; + } + + return ctm_succeeded; + } + + return ctm_failed; +} + +// ABI defined routine called at the start of a cleanup handler. +extern "C" bool +__cxa_begin_cleanup(_Unwind_Exception* ue_header) +{ + __cxa_eh_globals *globals = __cxa_get_globals(); + __cxa_exception *header = __get_exception_header_from_ue(ue_header); + bool native = __is_gxx_exception_class(header->unwindHeader.exception_class); + + + if (native) + { + header->propagationCount++; + // Add it to the chain if this is the first time we've seen this + // exception. + if (header->propagationCount == 1) + { + header->nextPropagatingException = globals->propagatingExceptions; + globals->propagatingExceptions = header; + } + } + else + { + // Remember the exception object, so end_cleanup can return it. + // These cannot be stacked, so we must abort if we already have + // a propagating exception. + if (globals->propagatingExceptions) + std::terminate (); + globals->propagatingExceptions = header; + } + + return true; +} + +// Do the work for __cxa_end_cleanup. Returns the currently propagating +// exception object. +extern "C" _Unwind_Exception * +__gnu_end_cleanup(void) +{ + __cxa_exception *header; + __cxa_eh_globals *globals = __cxa_get_globals(); + + header = globals->propagatingExceptions; + + // Check something hasn't gone horribly wrong. + if (!header) + std::terminate(); + + if (__is_gxx_exception_class(header->unwindHeader.exception_class)) + { + header->propagationCount--; + if (header->propagationCount == 0) + { + // Remove exception from chain. + globals->propagatingExceptions = header->nextPropagatingException; + header->nextPropagatingException = NULL; + } + } + else + globals->propagatingExceptions = NULL; + + return &header->unwindHeader; +} + +// Assembly wrapper to call __gnu_end_cleanup without clobbering r1-r3. +// Also push r4 to preserve stack alignment. +#ifdef __thumb__ +asm (".global __cxa_end_cleanup\n" +" .type __cxa_end_cleanup, \"function\"\n" +" .thumb_func\n" +"__cxa_end_cleanup:\n" +" push\t{r1, r2, r3, r4}\n" +" bl\t__gnu_end_cleanup\n" +" pop\t{r1, r2, r3, r4}\n" +" bl\t_Unwind_Resume @ Never returns\n"); +#else +asm (".global __cxa_end_cleanup\n" +" .type __cxa_end_cleanup, \"function\"\n" +"__cxa_end_cleanup:\n" +" stmfd\tsp!, {r1, r2, r3, r4}\n" +" bl\t__gnu_end_cleanup\n" +" ldmfd\tsp!, {r1, r2, r3, r4}\n" +" bl\t_Unwind_Resume @ Never returns\n"); +#endif + +#endif -- cgit v1.2.3