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llvm-project/libcxxabi/include/__cxxabi_config.h

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[libcxxabi] Fix -Werror build for 32-bit non-ARM. Summary: The inclusion of Unwind-EHABI.h was insufficiently guarded (LIBCXXABI_ARM_EHABI was beign checked without ever being defined). Move the check into the header file itself, add the check to the source file, and clean up the existing checks. LIBCXXABI_ARM_EHABI didn't have a canonical defintion; it was duplicated across cxxabi.h, libunwind.h, and unwind.h. Move the definition into __cxxabi_config.h and clean up the old cruft (note: we will have to ship this header). There are also a few drive-by formatting/whitespace cleanups. Reviewers: jroelofs, thakis, compnerd Reviewed By: compnerd Subscribers: compnerd, aemerson, cfe-commits Differential Revision: http://reviews.llvm.org/D7419 llvm-svn: 228363
2015-02-06 07:55:15 +08:00
//===-------------------------- __cxxabi_config.h -------------------------===//
//
Update more file headers across all of the LLVM projects in the monorepo to reflect the new license. These used slightly different spellings that defeated my regular expressions. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351648
2019-01-19 18:56:40 +08:00
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
[libcxxabi] Fix -Werror build for 32-bit non-ARM. Summary: The inclusion of Unwind-EHABI.h was insufficiently guarded (LIBCXXABI_ARM_EHABI was beign checked without ever being defined). Move the check into the header file itself, add the check to the source file, and clean up the existing checks. LIBCXXABI_ARM_EHABI didn't have a canonical defintion; it was duplicated across cxxabi.h, libunwind.h, and unwind.h. Move the definition into __cxxabi_config.h and clean up the old cruft (note: we will have to ship this header). There are also a few drive-by formatting/whitespace cleanups. Reviewers: jroelofs, thakis, compnerd Reviewed By: compnerd Subscribers: compnerd, aemerson, cfe-commits Differential Revision: http://reviews.llvm.org/D7419 llvm-svn: 228363
2015-02-06 07:55:15 +08:00
//
//===----------------------------------------------------------------------===//
#ifndef ____CXXABI_CONFIG_H
#define ____CXXABI_CONFIG_H
c++abi: whitespace adjustment Cleanup some code with clang-format to make the following change easier to identify material difference. NFC. llvm-svn: 254690
2015-12-04 10:14:41 +08:00
#if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
[libcxxabi] Fix -Werror build for 32-bit non-ARM. Summary: The inclusion of Unwind-EHABI.h was insufficiently guarded (LIBCXXABI_ARM_EHABI was beign checked without ever being defined). Move the check into the header file itself, add the check to the source file, and clean up the existing checks. LIBCXXABI_ARM_EHABI didn't have a canonical defintion; it was duplicated across cxxabi.h, libunwind.h, and unwind.h. Move the definition into __cxxabi_config.h and clean up the old cruft (note: we will have to ship this header). There are also a few drive-by formatting/whitespace cleanups. Reviewers: jroelofs, thakis, compnerd Reviewed By: compnerd Subscribers: compnerd, aemerson, cfe-commits Differential Revision: http://reviews.llvm.org/D7419 llvm-svn: 228363
2015-02-06 07:55:15 +08:00
!defined(__ARM_DWARF_EH__)
[libcxxabi] Clean up macro usage. Convention in libcxxabi is to use !defined(FOO) not !FOO. Differential Revision: https://reviews.llvm.org/D30459 llvm-svn: 296612
2017-03-01 19:42:01 +08:00
#define _LIBCXXABI_ARM_EHABI
[libcxxabi] Fix -Werror build for 32-bit non-ARM. Summary: The inclusion of Unwind-EHABI.h was insufficiently guarded (LIBCXXABI_ARM_EHABI was beign checked without ever being defined). Move the check into the header file itself, add the check to the source file, and clean up the existing checks. LIBCXXABI_ARM_EHABI didn't have a canonical defintion; it was duplicated across cxxabi.h, libunwind.h, and unwind.h. Move the definition into __cxxabi_config.h and clean up the old cruft (note: we will have to ship this header). There are also a few drive-by formatting/whitespace cleanups. Reviewers: jroelofs, thakis, compnerd Reviewed By: compnerd Subscribers: compnerd, aemerson, cfe-commits Differential Revision: http://reviews.llvm.org/D7419 llvm-svn: 228363
2015-02-06 07:55:15 +08:00
#endif
ibc++abi: mark visibility Mark functions and types with the appropriate visibility. This is particularly useful for environments which explicitly indicate origin of functions (Windows). This aids in generating libc++abi as a DSO which exposes only the public interfaces. llvm-svn: 254691
2015-12-04 10:14:58 +08:00
#if !defined(__has_attribute)
#define __has_attribute(_attribute_) 0
#endif
[libc++abi] Default to DLL annotations on Windows `__declspec(dllexport)` and `__declspec(dllimport)` should only be used when building libc++abi as a DLL, but that's the more common use case, so default to adding the annotations and add an option to opt out. Similar to r282449, which made the corresponding change for libc++. Differential Revision: https://reviews.llvm.org/D24945 llvm-svn: 282470
2016-09-27 11:44:09 +08:00
#if defined(_WIN32)
[libc++abi] Add _LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS It's useful to be able to disable visibility annotations entirely; for example, if we're building libc++abi static to include in another library, and we don't want any libc++abi functions getting exported out of that library. This is a generalization of _LIBCXXABI_DISABLE_DLL_IMPORT_EXPORT. Differential Revision: https://reviews.llvm.org/D26950 llvm-svn: 288692
2016-12-06 03:42:11 +08:00
#if defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
[libc++abi] Default to DLL annotations on Windows `__declspec(dllexport)` and `__declspec(dllimport)` should only be used when building libc++abi as a DLL, but that's the more common use case, so default to adding the annotations and add an option to opt out. Similar to r282449, which made the corresponding change for libc++. Differential Revision: https://reviews.llvm.org/D24945 llvm-svn: 282470
2016-09-27 11:44:09 +08:00
#define _LIBCXXABI_HIDDEN
#define _LIBCXXABI_DATA_VIS
#define _LIBCXXABI_FUNC_VIS
#define _LIBCXXABI_TYPE_VIS
#elif defined(_LIBCXXABI_BUILDING_LIBRARY)
ibc++abi: mark visibility Mark functions and types with the appropriate visibility. This is particularly useful for environments which explicitly indicate origin of functions (Windows). This aids in generating libc++abi as a DSO which exposes only the public interfaces. llvm-svn: 254691
2015-12-04 10:14:58 +08:00
#define _LIBCXXABI_HIDDEN
libc++abi: build with -fvisibility=hidden Enable building libc++abi with hidden visibility by default. The ABI mandated interfaces (and a few extra) are already set up to be externally visible. This allows us to ensure that any implementation details are not leaked. llvm-svn: 270816
2016-05-26 10:12:20 +08:00
#define _LIBCXXABI_DATA_VIS __declspec(dllexport)
ibc++abi: mark visibility Mark functions and types with the appropriate visibility. This is particularly useful for environments which explicitly indicate origin of functions (Windows). This aids in generating libc++abi as a DSO which exposes only the public interfaces. llvm-svn: 254691
2015-12-04 10:14:58 +08:00
#define _LIBCXXABI_FUNC_VIS __declspec(dllexport)
#define _LIBCXXABI_TYPE_VIS __declspec(dllexport)
#else
#define _LIBCXXABI_HIDDEN
libc++abi: build with -fvisibility=hidden Enable building libc++abi with hidden visibility by default. The ABI mandated interfaces (and a few extra) are already set up to be externally visible. This allows us to ensure that any implementation details are not leaked. llvm-svn: 270816
2016-05-26 10:12:20 +08:00
#define _LIBCXXABI_DATA_VIS __declspec(dllimport)
ibc++abi: mark visibility Mark functions and types with the appropriate visibility. This is particularly useful for environments which explicitly indicate origin of functions (Windows). This aids in generating libc++abi as a DSO which exposes only the public interfaces. llvm-svn: 254691
2015-12-04 10:14:58 +08:00
#define _LIBCXXABI_FUNC_VIS __declspec(dllimport)
#define _LIBCXXABI_TYPE_VIS __declspec(dllimport)
#endif
#else
[libc++abi] Add _LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS It's useful to be able to disable visibility annotations entirely; for example, if we're building libc++abi static to include in another library, and we don't want any libc++abi functions getting exported out of that library. This is a generalization of _LIBCXXABI_DISABLE_DLL_IMPORT_EXPORT. Differential Revision: https://reviews.llvm.org/D26950 llvm-svn: 288692
2016-12-06 03:42:11 +08:00
#if !defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
#define _LIBCXXABI_HIDDEN __attribute__((__visibility__("hidden")))
#define _LIBCXXABI_DATA_VIS __attribute__((__visibility__("default")))
#define _LIBCXXABI_FUNC_VIS __attribute__((__visibility__("default")))
#if __has_attribute(__type_visibility__)
#define _LIBCXXABI_TYPE_VIS __attribute__((__type_visibility__("default")))
#else
#define _LIBCXXABI_TYPE_VIS __attribute__((__visibility__("default")))
#endif
ibc++abi: mark visibility Mark functions and types with the appropriate visibility. This is particularly useful for environments which explicitly indicate origin of functions (Windows). This aids in generating libc++abi as a DSO which exposes only the public interfaces. llvm-svn: 254691
2015-12-04 10:14:58 +08:00
#else
[libc++abi] Add _LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS It's useful to be able to disable visibility annotations entirely; for example, if we're building libc++abi static to include in another library, and we don't want any libc++abi functions getting exported out of that library. This is a generalization of _LIBCXXABI_DISABLE_DLL_IMPORT_EXPORT. Differential Revision: https://reviews.llvm.org/D26950 llvm-svn: 288692
2016-12-06 03:42:11 +08:00
#define _LIBCXXABI_HIDDEN
#define _LIBCXXABI_DATA_VIS
#define _LIBCXXABI_FUNC_VIS
#define _LIBCXXABI_TYPE_VIS
ibc++abi: mark visibility Mark functions and types with the appropriate visibility. This is particularly useful for environments which explicitly indicate origin of functions (Windows). This aids in generating libc++abi as a DSO which exposes only the public interfaces. llvm-svn: 254691
2015-12-04 10:14:58 +08:00
#endif
#endif
[libc++abi] Clean up visibility Use the libc++abi visibility macros instead of pragmas or using visibility attributes directly. Clean up redundant attributes on definitions (where the declarations already have visibility attributes applied, from either libc++ or libc++abi headers). Introduce _LIBCXXABI_WEAK as a drive-by cleanup, which matches the semantics of _LIBCPP_WEAK. No functional change. Tested by building on Linux before and after this change and verifying that the list of exported symbols is identical. Differential Revision: https://reviews.llvm.org/D26949 llvm-svn: 296576
2017-03-01 11:55:57 +08:00
#if defined(_WIN32)
#define _LIBCXXABI_WEAK
#else
#define _LIBCXXABI_WEAK __attribute__((__weak__))
#endif
[CFI] Disable CFI checks for __cxa_decrement_exception_refcount Summary: exception_header->exceptionDestructor is a void(*)(void*) function pointer; however, it can point to destructors like std:: exception::~exception that don't match that type signature. Reviewers: pcc, vitalybuka Reviewed By: vitalybuka Subscribers: kcc, christof, cfe-commits Differential Revision: https://reviews.llvm.org/D45455 llvm-svn: 329629
2018-04-10 06:11:28 +08:00
#if defined(__clang__)
#define _LIBCXXABI_COMPILER_CLANG
Fix PR41465 - Use __builtin_mul_overflow instead of hand-rolled check. On ARM the hand-rolled check causes a call to __aeabi_uidiv, which we may not have a definition for. Using the builtin avoids the generation of any library call. llvm-svn: 358195
2019-04-12 01:16:35 +08:00
#elif defined(__GNUC__)
#define _LIBCXXABI_COMPILER_GCC
[CFI] Disable CFI checks for __cxa_decrement_exception_refcount Summary: exception_header->exceptionDestructor is a void(*)(void*) function pointer; however, it can point to destructors like std:: exception::~exception that don't match that type signature. Reviewers: pcc, vitalybuka Reviewed By: vitalybuka Subscribers: kcc, christof, cfe-commits Differential Revision: https://reviews.llvm.org/D45455 llvm-svn: 329629
2018-04-10 06:11:28 +08:00
#endif
#if __has_attribute(__no_sanitize__) && defined(_LIBCXXABI_COMPILER_CLANG)
#define _LIBCXXABI_NO_CFI __attribute__((__no_sanitize__("cfi")))
#else
#define _LIBCXXABI_NO_CFI
#endif
[libcxxabi] Define _LIBCXXABI_GUARD_ABI_ARM on WebAssembly This matches ItaniumCXXABI.cpp. Fixes PR42680 Differential Revision: https://reviews.llvm.org/D64961 llvm-svn: 368783
2019-08-14 09:30:48 +08:00
// wasm32 follows the arm32 ABI convention of using 32-bit guard.
#if defined(__arm__) || defined(__wasm32__)
[libc++abi] Create a macro for the 32 bit guard setting on ARM platforms Summary: The goal is to use a descriptive name for this feature, instead of just using __arm__. Reviewers: EricWF Subscribers: javed.absar, kristof.beyls, christof, jkorous, dexonsmith, libcxx-commits Tags: #libc Differential Revision: https://reviews.llvm.org/D60520 llvm-svn: 358106
2019-04-11 01:12:06 +08:00
# define _LIBCXXABI_GUARD_ABI_ARM
#endif
[libcxxabi] Fix -Werror build for 32-bit non-ARM. Summary: The inclusion of Unwind-EHABI.h was insufficiently guarded (LIBCXXABI_ARM_EHABI was beign checked without ever being defined). Move the check into the header file itself, add the check to the source file, and clean up the existing checks. LIBCXXABI_ARM_EHABI didn't have a canonical defintion; it was duplicated across cxxabi.h, libunwind.h, and unwind.h. Move the definition into __cxxabi_config.h and clean up the old cruft (note: we will have to ship this header). There are also a few drive-by formatting/whitespace cleanups. Reviewers: jroelofs, thakis, compnerd Reviewed By: compnerd Subscribers: compnerd, aemerson, cfe-commits Differential Revision: http://reviews.llvm.org/D7419 llvm-svn: 228363
2015-02-06 07:55:15 +08:00
#endif // ____CXXABI_CONFIG_H