[libc++abi] Avoid using deprecated throw specifications in >= C++11 (#109296)

Closes #108426

[libc++abi] Fix test failures with GCC 14 (#95759)

This adds a new `__cxa_call_terminate`, which GCC 14 generates calls to
now. Clang had `__clang_call_terminate` for the same use-case for a long

[libc++abi] Fix test failures with GCC 14 (#95759)

This adds a new `__cxa_call_terminate`, which GCC 14 generates calls to
now. Clang had `__clang_call_terminate` for the same use-case for a long
time. It also fixes a test that is enabled now, since GCC has the
`__has_feature` FTM now.

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[WebAssembly] Upstream misc. EH changes (#92990)

This upstreams more recent, mostly EH changes from libcxx and libcxxabi:
- `__cxa_init_primary_exception`-related changes made when updating to
LLV

[WebAssembly] Upstream misc. EH changes (#92990)

This upstreams more recent, mostly EH changes from libcxx and libcxxabi:
- `__cxa_init_primary_exception`-related changes made when updating to
LLVM 18.1.2 (https://github.com/emscripten-core/emscripten/pull/21638)
- Removes ctype macros
(https://github.com/emscripten-core/emscripten/pull/20960)
- Guard destructor changes with `__wasm__`
(https://github.com/emscripten-core/emscripten/pull/21974)

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[WebAssembly] __USING_WASM_EXCEPTIONS__ -> __WASM_EXCEPTIONS__ (#92840)

We've decided to change `__USING_WASM_EXCEPTIONS__` preprocessor to
`__WASM_EXCEPTIONS__` given that it's more concise.

[libc++abi] Implement __cxa_init_primary_exception and use it to optimize std::make_exception_ptr (#65534)

This patch implements __cxa_init_primary_exception, an extension to the
Itanium C++ ABI.

[libc++abi] Implement __cxa_init_primary_exception and use it to optimize std::make_exception_ptr (#65534)

This patch implements __cxa_init_primary_exception, an extension to the
Itanium C++ ABI. This extension is already present in both libsupc++ and
libcxxrt. This patch also starts making use of this function in
std::make_exception_ptr: instead of going through a full throw/catch
cycle, we are now able to initialize an exception directly, thus making
std::make_exception_ptr around 30x faster.

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[libc++abi][WebAssembly] Support Wasm EH

This adds Wasm-specific libc++abi changes to support Wasm exception
handling (https://github.com/WebAssembly/exception-handling).

Wasm EH requires `__USING_

[libc++abi][WebAssembly] Support Wasm EH

This adds Wasm-specific libc++abi changes to support Wasm exception
handling (https://github.com/WebAssembly/exception-handling).

Wasm EH requires `__USING_WASM_EXCEPTIONS__` to be defined. Wasm EH's
LSDA handling mostly shares that of SjLj EH.
Changes are:
- In Wasm, a destructor returns its argument.
- Wasm EH currently only has one phase (search) that does both search
and cleanup. So added an additional `set_registers` to support that.

The bulk of these changes was added back in Mar 2020 in
https://github.com/emscripten-core/emscripten/pull/10577 to emscripten
repo and has been used ever since. Now we'd like to upstream this so
that other toolchains that don't use emscripten libraries, e.g., WASI,
can use this too.

Companion patch: D158919

Reviewed By: dschuff, #libc_abi, phosek

Differential Revision: https://reviews.llvm.org/D158918

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[libcxxabi] Use the right calling convention for exception destructors on i386 Windows

On Windows on i386, C++ member functions use a different calling
convention (`__thiscall`) than the default one

[libcxxabi] Use the right calling convention for exception destructors on i386 Windows

On Windows on i386, C++ member functions use a different calling
convention (`__thiscall`) than the default one for regular functions
(`__cdecl`). (On Windows on architectures other than i386, both calling
convention attributes are no-ops.)

This matches how libstdc++ declares these types.

This fixes the std/thread/futures/futures.{shared,unique}_future/dtor.pass.cpp
tests on i386 mingw.

Differential Revision: https://reviews.llvm.org/D124990

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[libc++abi] Bump the libc++abi version and add it to the post-release list

Differential Revision: https://reviews.llvm.org/D119947

[runtimes][NFC] Remove filenames at the top of the license notice

We've stopped doing it in libc++ for a while now because these names
would end up rotting as we move things around and copy/paste st

[runtimes][NFC] Remove filenames at the top of the license notice

We've stopped doing it in libc++ for a while now because these names
would end up rotting as we move things around and copy/paste stuff.
This cleans up all the existing files so as to stop the spreading
as people copy-paste headers around.

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[libc++abi] Do not declare __cxa_finalize and __cxa_atexit in <cxxabi.h>

These functions are not defined by libc++abi, so they don't belong in <cxxabi.h>.

Differential Revision: https://reviews.llv

[libc++abi] Do not declare __cxa_finalize and __cxa_atexit in <cxxabi.h>

These functions are not defined by libc++abi, so they don't belong in <cxxabi.h>.

Differential Revision: https://reviews.llvm.org/D75795

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Add cold attribute to one time construction APIs

_cxa_guard_acquire is used for only one purpose,
namely guarding local static variable initialization,
and since that purpose is definitionally cold,

Add cold attribute to one time construction APIs

_cxa_guard_acquire is used for only one purpose,
namely guarding local static variable initialization,
and since that purpose is definitionally cold,
it should be attributed as cold

Reviewed By: ldionne

Reviewers: mclow.lists, ldionne, jfb, yfeldblum

Differential Revision: https://reviews.llvm.org/D85873

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Revert "[libc++abi] Change __cxa_finalize return type to void"

This reverts commit fde9d33f7, which was not properly reviewed by a
libc++ or libc++abi code owner.

[libc++abi] Change __cxa_finalize return type to void

Summary:
The return type of __cxa_finalize is documented as void in the Itanium
C++ ABI, and it is void in various C libraries.

Reviewers: Eric

[libc++abi] Change __cxa_finalize return type to void

Summary:
The return type of __cxa_finalize is documented as void in the Itanium
C++ ABI, and it is void in various C libraries.

Reviewers: EricWF, ldionne, compnerd, mclow.lists, MaskRay

Reviewed By: MaskRay

Subscribers: MaskRay, dexonsmith, ldionne, libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D75795

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[libc++] Update link to Itanium C++ ABI documentation

llvm-svn: 373372

[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

Subscribe

[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

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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

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

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[libc++abi] Provide __cxa_thread_atexit on Fuchsia

Fuchsia already supports this interface.

Differential Revision: https://reviews.llvm.org/D53801

llvm-svn: 345534

[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

Fix non-reserved macro names LIBCXXABI_NORETURN and LIBCXXABI_ARM_EHABI.

This patch adds the required leading underscore to those macros.

llvm-svn: 296567

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 i

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

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c++abi: whitespace adjustment

Cleanup some code with clang-format to make the following change easier to
identify material difference. NFC.

llvm-svn: 254690

Implement uncaught_exceptions() to get a count, rather than a bool. Update the libc++abi version. Reviewed as http://reviews.llvm.org/D10067

llvm-svn: 238827

[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 ch

[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

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Enable -Wundef.

The problem that caused the need for http://reviews.llvm.org/D7419 was
caused by testing the value of something that was undefined. This
should prevent that in the future.

llvm-svn:

Enable -Wundef.

The problem that caused the need for http://reviews.llvm.org/D7419 was
caused by testing the value of something that was undefined. This
should prevent that in the future.

llvm-svn: 228257

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Whitespace cleanup.

llvm-svn: 228195