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Fixes warnings (or errors, if someone injects -Werror in their build system,
which happens in fact with some folks vendoring LLVM too) with Clang 16:
```
+/var/tmp/portage.notmp/portage/sys-devel/llvm-15.0.4/work/llvm_build-abi_x86_64.amd64/CMakeFiles/CMakeTmp/src.c:3:9: warning: a function declaration without a prototype
is deprecated in all versions of C [-Wstrict-prototypes]
-/var/tmp/portage.notmp/portage/sys-devel/llvm-14.0.4/work/llvm_build-abi_x86_64.amd64/CMakeFiles/CMakeTmp/src.c:3:9: error: a function declaration without a prototype is
deprecated in all versions of C [-Werror,-Wstrict-prototypes]
int main() {return 0;}
^
void
```
Differential Revision: https://reviews.llvm.org/D137503
(cherry picked from commit 32a2af44e1e882f13d1cc2817f0a8d4d8b375d4d)
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with links to discourse.
Reviewed By: #libc_abi, ldionne
Differential Revision: https://reviews.llvm.org/D129675
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We already link libunwind explicitly so avoid trying to link toolchain's
default libunwind which may be missing. This matches what we already do
for libcxx.
Differential Revision: https://reviews.llvm.org/D129469
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This patch is to enable exception handling on the z/OS platform that is compatible with the existing z/OS runtime. No functionality of libcxxabi has been changed for other platforms. With this patch the hope is we can add z/OS as a platform to perform testing on any C++ ABI changes.
There is a primary difference for the z/OS implementation. On z/OS the thrown object is added to a linked list of caught and uncaught exceptions. The unwinder uses the top one as the current exception it is trying to find the landing pad for. We have to pop the top exception after we get it’s landing pad for our unwinder to correctly get any subsequent rethrows or nested exception calls.
Differential Revision: https://reviews.llvm.org/D99913
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Summary:
This patch adds _LIBCXXABI_FUNC_VIS to the definitions of the personality and helper routines for the state table based EH, now that the support of the visibility attribute is being added to AIX Clang. Currently an export list is generated in the absence of the visibility attribute support downstream.
Reviewed by: MaskRay, daltenty
Differential Revision: https://reviews.llvm.org/D126915
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Reviewed By: ldionne, philnik, #libc, #libc_abi
Differential Revision: https://reviews.llvm.org/D126667
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This patch switches the build compiler for AIX from ibm-clang to clang. ibm-clang++_r has `-pthread` by default, but clang for AIX doesn't, so `-pthread` had to be added to the test config. A bunch of tests now pass, so the `XFAIL` was removed. This patch also switch the build to use the visibility support available in clang-15 to control symbols exported by the shared library (AIX traditionally uses explicit export lists for this purpose).
Reviewed By: #libc, #libc_abi, daltenty, #libunwind, ldionne
Differential Revision: https://reviews.llvm.org/D127470
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The flexibility around extern template instantiation declarations in
libc++ result in a very complicated model, especially when support for
slightly different configurations (like the debug mode or assertions
in the dylib) are taken into account. That results in unexpected bugs
like http://llvm.org/PR50534 (and there have been multiple similar
bugs in the past, notably around the debug mode).
This patch gets rid of the _LIBCPP_DISABLE_EXTERN_TEMPLATE knob, which
I don't think is fundamental. Indeed, the motivation for that knob was to
avoid taking a dependency on the library, however that can be done better
by linking against the static library instead. And in fact, some parts of
the headers will always depend on things defined in the library, which
defeats the original goal of _LIBCPP_DISABLE_EXTERN_TEMPLATE.
Differential Revision: https://reviews.llvm.org/D103960
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ARM EHABI isn't signalled by any specific compiler builtin define,
but is implied by the lack of defines specifying any other
exception handling mechanism, `__USING_SJLJ_EXCEPTIONS__` or
`__ARM_DWARF_EH__`.
As Windows SEH also can be used for unwinding, check for the
`__SEH__` define too, in the same way.
Differential Revision: https://reviews.llvm.org/D126866
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Summary:
This patch adds the personality and helper functions for the state table based EH used by IBM legacy compilers xlC and xlclang++ on AIX.
* A high level description of the state table based EH is provided in the code comments.
* Function scan_state_tab() is added to scan the state table. It is invoked by the state table personality routine __xlcxx_personality_v0() and returns scan_results like scan_eh_tab() does.
* A couple of EH helper functions used by xlC and xlclang++ generated code are also added, e.g., __xlc_catch_matchv2() which checks whether the thrown object matches the catch handler's exception type.
* Debugging macros _LIBCXXABI_TRACE_STATETAB, _LIBCXXABI_TRACE_STATETAB0, and _LIBCXXABI_TRACING_STATETAB are added to dump state table scanning traces if environment variable LIBCXXABI_PRINT_STATTAB is set.
* The state variable and state table data is the LSDA found from the traceback table of the function during unwinding.
Reviewed by: MaskRay, cebowleratibm, libc++abi
Differential Revision: https://reviews.llvm.org/D100504
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Since those features are general properties of the environment, it makes
sense to use them from libc++abi too, and so the name libcpp-has-no-xxx
doesn't make sense.
Differential Revision: https://reviews.llvm.org/D126482
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Add a warning and tweak the release note to explain that the deprecation
targets libc++, libc++abi and libuwnind as well.
Also, as a fly-by, ensure that our CI runs the legacy testing configuration
for libc++, libc++abi and libunwind. This doesn't matter too much since
it's deprecated, but we might as well test it properly.
Differential Revision: https://reviews.llvm.org/D126478
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Summary:
The size of long double in RISCV (both RV32 and RV64) is 16 bytes, thus
the mangled_size shouble be 32.
This patch will fix test case
"_ZN5test01hIfEEvRAcvjplstT_Le4001a000000000000000E_c"
in test_demangle.pass.cpp, which is expected to be invalid but demangler
returned "void test0::h<float>(char (&) [(unsigned int)((sizeof (float))
+ (0x0.000000004001ap-16382L))])" in RISCV environment without this patch.
Reviewed By: urnathan
Differential Revision: https://reviews.llvm.org/D126480
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Like we have been doing for libc++ for a while now, start using
from-scratch testing configurations for libc++abi.
As a fly-by fix, remove the LIBCXXABI_NO_TIMER macro, which was defined
but never used.
Differential Revision: https://reviews.llvm.org/D125242
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Also, add a CI job that tests this configuration. The exact configuration
is that we build a shared libc++ and merge objects for the ABI library
and the unwinder library into it.
Differential Revision: https://reviews.llvm.org/D125903
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(In the case of libunwind, the cmake option is called
LIBUNWIND_HIDE_SYMBOLS, but it has the same effect as
LIBCXX_HERMETIC_STATIC_LIBRARY and
LIBCXXABI_HERMETIC_STATIC_LIBRARY.)
Previously, the same issue was dealt with by setting a project wide
define (_LIBUNWIND_HIDE_SYMBOLS,
_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS and
_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) if only building a static
library. If building both static and shared at the same time, this
wasn't set, and the static library would contain dllexport directives.
The LIB*_HERMETIC_STATIC_LIBRARY and LIBUNWIND_HIDE_SYMBOLS cmake
options only apply the defines to the static library in the build,
even if building both static and shared at the same time.
(This could only be done use after the object libraries were
enabled, as a shared libcxx needs libcxxabi object files built
with dllexports included.)
This allows removing inelegant code for deciding how to build the
libcxxabi static library and a TODO comment that suggested that
users should need to start setting an option, which they shouldn't
need to. Finally, this gets rid of two XFAILs in tests.
Differential Revision: https://reviews.llvm.org/D125715
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Program may set the RA_SIGN_STATE pseudo register by expressions.
Libunwind expected only the DW_CFA_AARCH64_negate_ra_state could change the value
of the register which leads to runtime errors on PAC enabled systems.
In the recent version of the aadwarf64[1] a limitation is added[2] to forbid the mixing the
DW_CFA_AARCH64_negate_ra_state with other DWARF Register Rule Instructions.
[1] https://github.com/ARM-software/abi-aa/releases/tag/2022Q1
[2] https://github.com/ARM-software/abi-aa/pull/129
Reviewed By: #libunwind, MaskRay
Differential Revision: https://reviews.llvm.org/D123692
Reland: test moved because it depends on exceptions.
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This is a variant of D116689 rebased on top of the new (proposed) ABI
refactoring in D120727. It should conserve the basic properties of the
original patch by @phosek, except it also allows cleaning up the merging
of libc++abi into libc++ from the libc++ side.
Differential Revision: https://reviews.llvm.org/D125393
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Prior to D120727, the libcxx build was responsible for copying libcxxabi
headers into the right location, both in the build and install trees,
but now it's the responsibility of the libcxxabi build. While the build
already did the right thing for the install tree, it wouldn't copy
headers into the build tree, resulting in errors when trying to use the
just built toolchain as is the case in the runtimes build when building
compiler-rt runtimes.
Differential Revision: https://reviews.llvm.org/D125597
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Standalone builds have been deprecated and then removed for a while now.
Trying to use standalone builds leads to a fatal CMake error, so this
code is all dead. Remove it to clean things up.
Differential Revision: https://reviews.llvm.org/D125561
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This keeps the same logic, but uses early return to avoid multiple layers
of nested ifs and make the code simpler to follow.
Differential Revision: https://reviews.llvm.org/D125476
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This patch overhauls how we pick up the ABI library. Instead of setting
ad-hoc flags, it creates interface targets that can be linked against by
the rest of the build, which is easier to follow and extend to support
new ABI libraries.
This is intended to be a NFC change, however there are some additional
simplifications and improvements we can make in the future that would
require a slight behavior change.
Differential Revision: https://reviews.llvm.org/D120727
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We need to expand special substitutions in four different ways. This
refactors to only have one conversion from enum to string, and derive
the other 3 needs off that.
The SpecialSubstitution node is derived from the
ExpandedSpecialSubstitution. While this may seem unintuitive, it
works out quite well, as SpecialSubstitution can then use the former's
getBaseName and remove an unneeded 'basic_' prefix, for those
substitutions that are instantiations (to known typedef). Similarly
all those instantiations use the same set of template arguments (with
'basic_string', getting an additional 'allocator' arg).
Expansion tests were added in D123134, and remain unchanged.
Reviewed By: MaskRay, dblaikie
Differential Revision: https://reviews.llvm.org/D125257
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As a fly-by fix, also let `__cxa_demangle` allocate its buffer alone,
since we are not allowed to pass a non-malloc'd buffer to it.
Differential Revision: https://reviews.llvm.org/D125268
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We do it for libc++, and it's rather useful for debugging e.g. CI.
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When we terminate due to an exception being uncaught, libc++abi prints
a message saying "terminating with uncaught exception [...]". This patch
changes that to say "terminating due to uncaught exception [...]" instead,
which is a bit clearer. Indeed, I've seen some people being confused and
thinking that libc++abi was the component throwing the exception.
Differential Revision: https://reviews.llvm.org/D125245
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The variable name checked didn't match the one set on the line above.
This error was introduced in b3df14b6c98702ce50401fd039852787373e4676.
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With the demangler parenthesizing 'a >> b' inside template parameters,
because C++11 parsing of >> there, we don't really need to add spaces
between adjacent template arg closing '>' chars. In 2022, that just
looks odd.
Reviewed By: MaskRay
Differential Revision: https://reviews.llvm.org/D123134
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The output buffer has a 'back' member, which returns NUL when you try
it with an empty buffer. But there are no use cases that need that
additional functionality. This makes the 'back' member behave more
like STL containers' back members. (It still returns a value, not a
reference.)
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D123201
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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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(Exitingly) a fold expression's operators include .* and ->*, but we
failed to demangle them as we categorize those as MemberExprs, not
BinaryExprs.
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D123305
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Test depends on pthread_cancel which is not supported on Android.
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When the sigreturn trampoline is found the unw_proc_info_t.end_ip need to be set to
indicate a stack frame is found.
Reviewed By: cjdb, #libunwind, MaskRay
Differential Revision: https://reviews.llvm.org/D124522
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pointer
As seen in https://github.com/llvm/llvm-project/issues/51854
llvm-cxxfilt was having trouble demangling the case "_Z1fIDnLDn0EEvv".
We handled the "LDNE" case and "LPi0E" but not "LDn0E". This change adds
that handling.
Differential Revision: https://reviews.llvm.org/D124010
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Reverting due to a bot failure:
https://lab.llvm.org/buildbot/#/builders/5/builds/22738
This reverts commit 5b3ca24a35e91bf9c19af856e7f92c69b17f989e.
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Every non-testcase use of OutputBuffer contains code to allocate an
initial buffer (using either 128 or 1024 as initial guesses). There's
now no need to do that, given recent changes to the buffer extension
heuristics -- it allocates a 1k(ish) buffer on first need.
Just pass in a buffer (if any) to the constructor. Thus the
OutputBuffer's ownership of the buffer starts at its own lifetime
start. We can reduce the lifetime of this object in several cases.
That new constructor takes a 'size_t *' for the size argument, as all
uses with a non-null buffer are passing through a malloc'd buffer from
their own caller in this manner.
The buffer reset member function is never used, and is deleted.
The original buffer initialization code would return a failure code if
that first malloc failed. Existing code either ignored that, called
std::terminate with a FIXME, or returned an error code.
But that's not foolproof anyway, as a subsequent buffer extension
failure ends up calling std::terminate. I am working on addressing
that unfortunate failure mode in a manner more consistent with the C++
ABI design.
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D122604
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Placing a run-once test inside the operator lookup function caused
problems with the thread sanitizer. See D122975.
Break out the operator table into a member variable, and move the test
to the unit test machinery.
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D123390
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Avoid repeating CMake checks across runtimes by unifying names of
variables used for results to leverage CMake caching.
Differential Revision: https://reviews.llvm.org/D110005
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Reviewed By: #libc_abi, aaron.ballman, urnathan
Differential Revision: https://reviews.llvm.org/D122530
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Differential Revision: https://reviews.llvm.org/D123081
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The underlying TLS destruction order bug has been fixed in the OS. This
would technically still fail when running on top of macOS < 12, however
we don't have a good way of encoding that using Lit features. Indeed,
the existing target=<FOO> Lit feature encodes the deployment target,
not the actual runtime system that the tests are being run on.
If this test starts failing on your machine after this patch, upgrading
to macOS 12 should solve the problem.
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Add contents to the demangler node dumper's print(Prec) functions.
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D122740
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The demangler has a utility class 'SwapAndRestore'. That name is
confusing. It's not swapping anything, and the restore part happens at
the object's destruction. What it's actually doing is allowing a
override of some value that is dynamically accessible within the
lifetime of a lexical scope. Thus rename it to ScopedOverride, and
tweak it's member variable names.
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D122606
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GCC emits [some] static symbols with an 'L' mangling, which we attempt
to demangle. But the module mangling changes have exposed that we
were doing so at the wrong level. Such manglings are outside of the
ABI as they are internal-linkage, so a bit of reverse engineering was
needed. This adjusts the demangler along the same lines as the
existing gcc demangler (which is not yet module-aware). 'L' is part
of an unqualified name. As before we merely parse the 'L', and then
ignore it.
Reviewed By: iains
Differential Revision: https://reviews.llvm.org/D123138
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Both > and >> expressions need to be parenthesized inside template
argument lists.
Reviewed By: dblaikie, rjmccall
Differential Revision: https://reviews.llvm.org/D122474
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* Add instantiation tests to ItaniumDemangleTest, to make sure all
match functions provide constructor arguments to the provided functor.
* Fix the Node constructors that lost const qualification on arguments.
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D122665
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