Rather than manually checking for support for the spelling of the C++
standard, indicate to CMake that we require that the compiler support
C++11 and that we compile without the GNU extensions. This simplifies
the flags handling in libc++abi itself by relying on CMake to translate
the flag and add it as appropriate.
llvm-svn: 305175
Use the POSITION_INDEPENDENT_CODE target property to indicate that we
should be building with -fPIC or the equivalent flag based on the
toolchain that we are using. This makes the check more portable and
simplifies the flags management. Because we don't want this setting to
propagate in the case of an in-tree build, set the property on the
targets we construct explicitly rather than setting
CMAKE_POSITION_INDEPENDENT_CODE to ON globally.
llvm-svn: 305174
Use the C++11 (formalised in C++17) tag to indicate a fallthrough in the
switch case. Silences a -Wimplicit-fallthrough warning with gcc:7
llvm-svn: 305173
Refactor cmake to remove dependence on LLVM's cmake modules.
This improves handling of cmake checks when cross compiling and brings
libcxxabi in line with libcxx and other project modules.
Differential revision: https://reviews.llvm.org/D33635
llvm-svn: 304374
The problem was that if base_name() was called from a context without
an actual base name, it could gulp up the entire string, which can
result in recursive duplications. The fix is to be more strict as to
what qualifies as a base name.
Differential revision: https://reviews.llvm.org/D33637
llvm-svn: 304113
Summary:
Previously if we parsed a constructor then we set parsed_ctor_dtor_cv
to true and never reseted it. This causes issue when a template argument
references a constructor (e.g. type of lambda defined inside a
constructor) as we will have the parsed_ctor_dtor_cv flag set what will
cause issues when parsing later arguments.
Reviewers: EricWF, compnerd
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D33385
llvm-svn: 303737
The problem is that multiple types could have been parsed from parse_type(),
which the lamdba parameter parsing didn't handle.
Differential revision: https://reviews.llvm.org/D33368
llvm-svn: 303718
r276215 made a change to annotate _Unwind_Exception with attribute
"aligned" so that an exception object following field __cxa_exception
is sufficiently aligned. This fix hasn't been incorporated to unwind.h
on Darwin since it is an ABI breaking change.
Instead of annotating struct _Unwind_Exception with the attribute, this
commit annotates field unwindHeader of __cxa_exception. This ensures the
exception object is sufficiently aligned without breaking the ABI.
This recommits r302978 and r302981, which were reverted in r303016
because a libcxx test was failing on an AArch64 bot. I also modified the
libcxxabi test case to check the alignment of the pointer returned by
__cxa_allocate_exception rather than compiling the test with -O1 and
checking whether it segfaults.
rdar://problem/25364625
Differential Revision: https://reviews.llvm.org/D33030
llvm-svn: 303175
For ARM EHABI, _Unwind_Exception is an alias of _Unwind_Control_Block,
which is not aligned, so we shouldn't align unwindHeader either.
rdar://problem/25364625
llvm-svn: 302981
r276215 made a change to annotate _Unwind_Exception with attribute
"aligned" so that an exception object following field __cxa_exception
is sufficiently aligned. This fix hasn't been incorporated to unwind.h
on Darwin since it is an ABI breaking change.
Instead of annotating struct _Unwind_Exception with the attribute, this
commit annotates field unwindHeader of __cxa_exception. This ensures the
exception object is sufficiently aligned without breaking the ABI.
This recommits r302763 with fixes to RUN lines in the test case.
rdar://problem/25364625
Differential Revision: https://reviews.llvm.org/D33030
llvm-svn: 302978
r276215 made a change to annotate _Unwind_Exception with attribute
"aligned" so that an exception object following field __cxa_exception
is sufficiently aligned. This fix hasn't been incorporated to unwind.h
on Darwin since it is an ABI breaking change.
Instead of annotating struct _Unwind_Exception with the attribute, this
commit annotates field unwindHeader of __cxa_exception. This ensures the
exception object is sufficiently aligned without breaking the ABI.
rdar://problem/25364625
Differential Revision: https://reviews.llvm.org/D33030
llvm-svn: 302763
libc++abi can't depend on libc++, so disable extern templates in libc++
headers project-wide. This was previously done in cxa_demangle.cpp, but
I consider it more appropriate to do at the cmake level (since none of
libc++abi's source files can use libc++ extern templates).
I also think the _LIBCPP_NO_EXCEPTIONS in cxa_demangle.cpp is
suspicious, but I'm doing one thing at a time.
Differential Revision: https://reviews.llvm.org/D32329
llvm-svn: 302739
Summary: It's now completely empty, so we can remove it entirely.
Reviewers: mclow.lists, EricWF
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D31502
llvm-svn: 299129
This was originally there for the _POSIX_THREADS define, to detect the
presence of pthreads. That went away with the externalized threading
support, so the include can go away too.
config.h is now completely empty. A follow-up commit will remove it
entirely.
llvm-svn: 299087
This patch fully reformats fallback_malloc.cpp. Previously the test
was a mess of different styles and indentations. This made it very
hard to work in and read. Therefore I felt it was best to re-format
the whole thing.
Unfortuantly this means some history will be lost, but hopefully
much of it will still be accessible after ignoring whitespace changes.
llvm-svn: 296960
Summary:
In 32 bit builds on a 64 bit system `std::malloc` does not return correctly aligned memory. This leads to undefined behavior.
This patch switches to using `posix_memalign` to allocate correctly aligned memory instead.
Reviewers: mclow.lists, danalbert, jroelofs, compnerd
Reviewed By: compnerd
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D25417
llvm-svn: 296952
Summary:
Currently both libc++ and libc++abi provide definitions for operator new/delete. However I believe this is incorrect and that one or the other should offer them.
This patch adds the CMake option `-DLIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS` which defaults to `OFF` unless otherwise specified. This means that by default
only libc++ provides the new/delete definitions.
Reviewers: mclow.lists, mehdi_amini, dexonsmith, beanz, jroelofs, danalbert, smeenai, rmaprath, mgorny
Reviewed By: mehdi_amini
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D30517
llvm-svn: 296801
Summary:
Currently both libc++ and libc++abi provide definitions for new/delete. However libc++abi's definitions haven't been updated to include aligned new/delete or sized deallocation.
I don't see any reason why libc++abi shouldn't provide these newer overloads.
This patch copies libc++'s implementation of `new/delete` into libc++abi so that it's now up to date.
After applying this patch I plan to fix a longstanding bug where both libc++ and libc++abi provide definitions for new/delete.
Reviewers: mclow.lists, mehdi_amini, dexonsmith, danalbert, smeenai, rmaprath, jroelofs
Reviewed By: mehdi_amini
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D30514
llvm-svn: 296787
This patch cleans up how libc++abi handles the definitions for new/delete.
It is in preperation for upcoming changes to fix how both libc++ and libc++abi
handle new/delete.
The primary changes in this patch are:
* Move the definitions for bad_array_length and bad_new_array_length
into stdlib_exception.cpp. This way stdlib_new_delete.cpp only
contains new/delete.
* Rename cxa_new_delete.cpp -> stdlib_new_delete.cpp for consistency
with other files.
* Add a FIXME regarding when stdlib_new_delete.cpp is actually compiled
as part of the dylib.
llvm-svn: 296715
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
Made a mistake in the condition typo because LIBCXXABI_BAREMETAL is always
defined, I should have been checking the contents to see if it's enabled.
Differential Revision: https://reviews.llvm.org/D30343
llvm-svn: 296146
We've been having issues with using libcxxabi and libunwind for baremetal
targets because fprintf is dependent on io functions, this patch disables calls
to fprintf when building for baremetal in release mode.
Differential Revision: https://reviews.llvm.org/D30339
llvm-svn: 296136
When libcxxabi is built in LIBCXXABI_SILENT_TERMINATE mode, libcxx test suite reports
two failures:
std/depr/exception.unexpected/set.unexpected/get_unexpected.pass.cpp
std/depr/exception.unexpected/set.unexpected/set_unexpected.pass.cpp
This is because the default unexpected handler is set to std::abort instead of
std::terminate which these tests expect.
llvm-svn: 295175
When building as part of runtimes, there is no predefined order in
which the runtimes are loaded, so the targets from other projects
might not be available. We need to rely on HAVE_<name> variables
instead in that case.
Differential Revision: https://reviews.llvm.org/D29574
llvm-svn: 294552
When checking if the type is a r-value ref, we would not do a complete
check. This would result in us treating a trailing parameter reference
`&)` as a r-value ref, and improperly inject the cv qualifier on the
type. We now correctly demangle the type `KFvRmE` as a constant
function rather than a constant reference.
Fixes PR31741!
llvm-svn: 292973
Fix an off-by-one case which would destroy the final parameter in a
CV-qualified function type with a reference. We still get the CV
qualification incorrect, but at least we do not clobber the type name
any longer.
Partially fixes PR31741.
llvm-svn: 292963
The Itanium ABI [1] specifies that __cxa_demangle accept either:
1) symbol names, which start with "_Z"
2) type manglings, which do not start with "_Z"
r286788 erroneously assumes that it should only handle symbols, so this patch
reverts it and adds a counterexample to the testcase.
1: https://mentorembedded.github.io/cxx-abi/abi.html#demangler
Reviewers: zygoloid, EricWF
llvm-svn: 292418
The current std::terminate_handler pulls in some string code, some I/O
code, and more. Since it is automatically setup as the default, this
means that any trivial binary linking against libcxxabi will get this
extra bloat.
This patch allows disabling it as a build-time option, if you want to
avoid the extra bloat.
Patch by Tom Rybka!
Reviewers: EricWF
Subscribers: danalbert, llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D28497
llvm-svn: 291946
+ Now that libcxxabi shares the same threading API as libcxx, a whole
chunk of code in src/config.h is made redundant (I missed this earlier).
+ r291275 split off the externalized-thread-api libcxx configuration from the
external-thread-library libcxx configuration. libcxxabi should follow the
same approach.
llvm-svn: 291440
Use an `extern "C" { }` block around the definition rather than doing
the inline definition. This avoids a GCC warning about a declaration
being extern and having a definition. NFC.
llvm-svn: 290937
r281179 Introduced an externally threaded variant of the libc++ library. This
patch adds support for a similar library variant for libc++abi.
Differential revision: https://reviews.llvm.org/D27575
Reviewers: EricWF
llvm-svn: 290888
Saleem Abdulrasool