This is useful in cases where we only build static library and
libc++abi.a is combined with libc++.a into a single archive in which
case we don't want to have libc++abi.a installed separately. The same
option is already provided by libcxx CMake build.
Differential Revision: https://reviews.llvm.org/D40194
llvm-svn: 318568
When using LLVM unwinder and static unwinder option is set, merge
libunwind and libc++abi objects into a single archive. libc++ already
supports merging libc++abi.a and libc++.a into a single archive; with
this change, it is possible to also include libunwind.a in the same
archive which is useful when doing static link and using libc++ as
a default C++ library and compiler-rt as a default runtime library.
Differential Revision: https://reviews.llvm.org/D39949
llvm-svn: 318563
compiler-rt recently added the __asan_handle_no_return() function that libc++abi
needs to use, however older versions of compiler-rt don't declare this interface
publicly and that breaks the libc++abi build.
This patch attempts to fix the issues by declaring the asan function explicitly,
so we don't depend on compiler-rt to provide the declaration.
llvm-svn: 313308
Summary:
compiler-rt recently added the `__asan_handle_no_return()` function that libc++abi needs to use, however older versions of compiler-rt don't provide this interface and that breaks the libc++abi build.
This patch attempts to fix the issues by using a macro to detect if `asan_interface.h` is new enough to provide the function.
See D37871
Reviewers: phosek, vitalybuka
Reviewed By: phosek, vitalybuka
Subscribers: dberris, cfe-commits
Differential Revision: https://reviews.llvm.org/D37872
llvm-svn: 313304
The ASan runtime on many systems intercepts cxa_throw just so it
can call asan_handle_no_return first. Some newer systems such as
Fuchsia don't use interceptors on standard library functions at all,
but instead use sanitizer-instrumented versions of the standard
libraries. When libc++abi is built with ASan, cxa_throw can just
call asan_handle_no_return itself so no interceptor is required.
Patch by Roland McGrath
Differential Revision: https://reviews.llvm.org/D37229
llvm-svn: 313215
The ASan runtime on many systems intercepts cxa_throw just so it
can call asan_handle_no_return first. Some newer systems such as
Fuchsia don't use interceptors on standard library functions at all,
but instead use sanitizer-instrumented versions of the standard
libraries. When libc++abi is built with ASan, cxa_throw can just
call asan_handle_no_return itself so no interceptor is required.
This is a re-land of r311045, which has become safe after r311869
changed compiler-rt to declare __asan_handle_no_return.
Patch by Roland McGrath
Differential Revision: https://reviews.llvm.org/D37229
llvm-svn: 312606
The ASan runtime on many systems intercepts cxa_throw just so it
can call asan_handle_no_return first. Some newer systems such as
Fuchsia don't use interceptors on standard library functions at all,
but instead use sanitizer-instrumented versions of the standard
libraries. When libc++abi is built with ASan, cxa_throw can just
call asan_handle_no_return itself so no interceptor is required.
Patch by Roland McGrath
Differential Revision: https://reviews.llvm.org/D36599
llvm-svn: 311045
The demangler now demangles by producing an AST, then traverses that
AST to produce a demangled name. This is done for performance reasons,
now the demangler doesn't manuiplate std::strings, which hurt
performance and caused string operations to be inlined into the
parser, leading to large code size and stack usage.
Differential revision: https://reviews.llvm.org/D35159
llvm-svn: 309340
This patch removes the dependancy on libc++'s __refstring header,
which was only a header in the first place so that libc++abi could
build library code using it, and not because libc++ needed it in
the headers.
This patch allows libc++ to stop shipping <__refstring> publicaly
at the cost of duplicating it across projects. Ideally libc++abi
would always require the libc++ sources when building, but that's
a separate discussion I plan to start on the mailing lists shortly.
llvm-svn: 307748
This is going to be used by the runtime build in the multi-target
setup to allow using different install prefix for each target.
Differential Revision: https://reviews.llvm.org/D33761
llvm-svn: 307611
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
As per r241993, libunwind_ext.h is not used anymore, and thus only the public libunwind includes are needed.
This eases distro packaging efforts and removes an unneeded requirement for out-of-tree building.
Reviewed as D33178
llvm-svn: 304359
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
Petr Hosek