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https://github.com/Gericom/teak-llvm.git
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6f9459f7fe
Summary: Those functions started being mistakenly exported from the libc++abi shared library after commit r344152 in 2018. Removing these symbols is technically an ABI break. However, they are not part of the C++ ABI, they haven't ever been re-exported from libc++, and they are not declared in any public header, so it's very unlikely that calls to these functions exist out there. Also, the functions have reserved names, so any impacted user would have to have tried really hard being broken by this removal. Note that avoiding this kind of problem is exactly why we're now controlling exported symbols explicitly with a textual list. Also note that applying the hidden visibility attribute is necessary because the list of exported symbols is only used on Apple platforms for the time being. Reviewers: phosek, mclow.lists, EricWF Subscribers: christof, jkorous, dexonsmith, libcxx-commits Tags: #libc Differential Revision: https://reviews.llvm.org/D68357 llvm-svn: 373602
120 lines
3.9 KiB
C++
120 lines
3.9 KiB
C++
//===------------------------- cxa_exception.h ----------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//
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// This file implements the "Exception Handling APIs"
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// https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html
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//
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//===----------------------------------------------------------------------===//
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#ifndef _CXA_EXCEPTION_H
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#define _CXA_EXCEPTION_H
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#include <exception> // for std::unexpected_handler and std::terminate_handler
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#include "cxxabi.h"
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#include "unwind.h"
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namespace __cxxabiv1 {
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static const uint64_t kOurExceptionClass = 0x434C4E47432B2B00; // CLNGC++\0
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static const uint64_t kOurDependentExceptionClass = 0x434C4E47432B2B01; // CLNGC++\1
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static const uint64_t get_vendor_and_language = 0xFFFFFFFFFFFFFF00; // mask for CLNGC++
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_LIBCXXABI_HIDDEN uint64_t __getExceptionClass (const _Unwind_Exception*);
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_LIBCXXABI_HIDDEN void __setExceptionClass ( _Unwind_Exception*, uint64_t);
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_LIBCXXABI_HIDDEN bool __isOurExceptionClass(const _Unwind_Exception*);
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struct _LIBCXXABI_HIDDEN __cxa_exception {
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#if defined(__LP64__) || defined(_LIBCXXABI_ARM_EHABI)
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// This is a new field to support C++ 0x exception_ptr.
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// For binary compatibility it is at the start of this
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// struct which is prepended to the object thrown in
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// __cxa_allocate_exception.
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size_t referenceCount;
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#endif
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// Manage the exception object itself.
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std::type_info *exceptionType;
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void (*exceptionDestructor)(void *);
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std::unexpected_handler unexpectedHandler;
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std::terminate_handler terminateHandler;
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__cxa_exception *nextException;
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int handlerCount;
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#if defined(_LIBCXXABI_ARM_EHABI)
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__cxa_exception* nextPropagatingException;
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int propagationCount;
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#else
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int handlerSwitchValue;
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const unsigned char *actionRecord;
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const unsigned char *languageSpecificData;
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void *catchTemp;
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void *adjustedPtr;
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#endif
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#if !defined(__LP64__) && !defined(_LIBCXXABI_ARM_EHABI)
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// This is a new field to support C++ 0x exception_ptr.
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// For binary compatibility it is placed where the compiler
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// previously adding padded to 64-bit align unwindHeader.
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size_t referenceCount;
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#endif
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_Unwind_Exception unwindHeader;
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};
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// http://sourcery.mentor.com/archives/cxx-abi-dev/msg01924.html
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// The layout of this structure MUST match the layout of __cxa_exception, with
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// primaryException instead of referenceCount.
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struct _LIBCXXABI_HIDDEN __cxa_dependent_exception {
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#if defined(__LP64__) || defined(_LIBCXXABI_ARM_EHABI)
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void* primaryException;
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#endif
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std::type_info *exceptionType;
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void (*exceptionDestructor)(void *);
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std::unexpected_handler unexpectedHandler;
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std::terminate_handler terminateHandler;
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__cxa_exception *nextException;
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int handlerCount;
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#if defined(_LIBCXXABI_ARM_EHABI)
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__cxa_exception* nextPropagatingException;
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int propagationCount;
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#else
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int handlerSwitchValue;
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const unsigned char *actionRecord;
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const unsigned char *languageSpecificData;
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void * catchTemp;
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void *adjustedPtr;
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#endif
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#if !defined(__LP64__) && !defined(_LIBCXXABI_ARM_EHABI)
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void* primaryException;
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#endif
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_Unwind_Exception unwindHeader;
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};
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struct _LIBCXXABI_HIDDEN __cxa_eh_globals {
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__cxa_exception * caughtExceptions;
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unsigned int uncaughtExceptions;
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#if defined(_LIBCXXABI_ARM_EHABI)
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__cxa_exception* propagatingExceptions;
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#endif
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};
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extern "C" _LIBCXXABI_FUNC_VIS __cxa_eh_globals * __cxa_get_globals ();
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extern "C" _LIBCXXABI_FUNC_VIS __cxa_eh_globals * __cxa_get_globals_fast ();
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extern "C" _LIBCXXABI_FUNC_VIS void * __cxa_allocate_dependent_exception ();
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extern "C" _LIBCXXABI_FUNC_VIS void __cxa_free_dependent_exception (void * dependent_exception);
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} // namespace __cxxabiv1
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#endif // _CXA_EXCEPTION_H
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