Commit Graph

882 Commits

Author SHA1 Message Date
Eric Fiselier 51fbb2e70a Update libc++abi's detection of aligned allocation after r344207.
llvm-svn: 344208
2018-10-11 00:18:54 +00:00
Louis Dionne 336db68378 [libcxxabi] Allow building with sanitizers enabled
Summary:
I copied the sanitizer-related logic in libcxx/lib/CMakeLists.txt. In
the future, it would be great to avoid duplicating this logic in the
compiler, libc++ and libc++abi.

Reviewers: EricWF

Subscribers: mgorny, christof, dexonsmith, libcxx-commits, davide

Differential Revision: https://reviews.llvm.org/D53028

llvm-svn: 344191
2018-10-10 22:00:58 +00:00
Marshall Clow 8a39827eb3 Blind attempt to fix linker errors when building libc++abit w/o exceptions.
llvm-svn: 344156
2018-10-10 17:12:54 +00:00
Marshall Clow 611a55a084 Make libc++abi work better with gcc's ARM unwind library. Reviewed as https://reviews.llvm.org/D42242
llvm-svn: 344152
2018-10-10 16:18:37 +00:00
Pavel Labath 6c656b73c5 Port llvm r342166 to libcxxabi demangler
Summary:
This was committed back in september (D51463), but it seems it never
made it into the libcxxabi copy.

The original commit message was:
  The hash computed for an ArrayType was different when first constructed
  versus when later profiled due to the constructor default argument, and
  we were not tracking constructor / destructor variant as part of the
  mangled name AST, leading to incorrect equivalences.

Reviewers: erik.pilkington, rsmith, EricWF

Subscribers: christof, ldionne, libcxx-commits

Differential Revision: https://reviews.llvm.org/D53063

llvm-svn: 344121
2018-10-10 08:39:16 +00:00
Louis Dionne dd1bed11d8 [NFC][unwind] Improve error message when a type has more than one RTTIs
The "dynamic_cast error 2" error can apparently happen when the same
type (with RTTI) is defined in more than one translation unit, and
those translation units are linked together. This is technically an
ODR violation, but making the error message more obvious is still
helpful.

llvm-svn: 344052
2018-10-09 14:55:15 +00:00
Eric Fiselier 44911a9e3a Update docs to reference new libc++ mailing lists.
llvm-svn: 342817
2018-09-22 19:52:12 +00:00
Eric Fiselier 4b47cbccd4 Fix incorrectly aligned exceptions in 32 bit builds.
This patch fixes a bug where exceptions in 32 bit builds
would be incorrectly aligned because malloc only provides 8 byte aligned
memory where 16 byte alignment is needed.

This patch makes libc++abi correctly use posix_memalign when it's
available. This requires defining _LIBCPP_BUILDING_LIBRARY so that
libc++ only defines _LIBCPP_HAS_NO_ALIGNED_ALLOCATION when libc doesn't
support it and not when aligned new/delete are disable for other
reasons.

This bug somehow made it into the 7.0 release, making it a regression.
Therefore this patch should be included in the next dot release.

llvm-svn: 342815
2018-09-22 19:22:36 +00:00
Pirama Arumuga Nainar 546de61000 [libc++abi] is_strcmp parameter to is_equal is unused for WIN32
Summary: Mark it as unused to avoid -Wunused-parameter.

Reviewers: EricWF, srhines, mstorsjo

Subscribers: christof, ldionne, libcxx-commits, cfe-commits

Differential Revision: https://reviews.llvm.org/D52368

llvm-svn: 342764
2018-09-21 20:01:22 +00:00
Sylvestre Ledru 1298143369 add a quick link to libc++
llvm-svn: 342627
2018-09-20 08:01:16 +00:00
Nico Weber da01b342b2 Merge Demangle change in r342330 to libcxxabi.
Differential Revision: https://reviews.llvm.org/D52104

llvm-svn: 342331
2018-09-15 18:25:49 +00:00
Richard Smith 2b1dc39d18 Port my recent changes from LLVM copy of the demangler:
r340663 - Allow Allocator::make to make a node of a different type than that
          requested.
r340664 - Add documentation comment to ForwardTemplateReference.
r340665 - Fix ExpandedSpecialSubstitution demangling for Sa and Sb.
r340670 - Allow demangler's node allocator to fail, and bail out of the entire
          demangling process when it does.

llvm-svn: 340671
2018-08-24 23:30:26 +00:00
Richard Smith 2077b62a62 Port LLVM r340203 (and r340205) to libcxxabi.
Move Itanium demangler implementation into a header file and add visitation support.

Summary:
This transforms the Itanium demangler into a generic reusable library that can
be used to build, traverse, and transform Itanium mangled name trees.

This is in preparation for adding a canonicalizing demangler, which
cannot live in the Demangle library for layering reasons. In order to
keep the diffs simpler, this patch moves more code to the new header
than is strictly necessary: in particular, all of the printLeft /
printRight implementations can be moved to the implementation file.
(And indeed we could make them non-virtual now if we wished, and remove
the vptr from Node.)

All nodes are now included in the Kind enumeration, rather than omitting
some of the Expr nodes, and the three different floating-point literal
node types now have distinct Kind values.

As a proof of concept for the visitation / matching mechanism, this
patch implements a Node dumping facility on top of it, replacing the
prior mechanism that produced the pretty-printed output rather than a
tree dump. Sample dump output:

FunctionEncoding(
  NameType("int"),
  NameWithTemplateArgs(
    NestedName(
      NameWithTemplateArgs(
        NameType("A"),
        TemplateArgs(
          {NameType("B")})),
      NameType("f")),
    TemplateArgs(
      {NameType("int")})),
  {},
  <null>,
  QualConst, FunctionRefQual::FrefQualLValue)

As a next step, it would make sense to move the LLVM high-level interface to
the demangler (the itaniumDemangler function and ItaniumPartialDemangler class)
into the Support library, and implement them in terms of the Demangle library.
This would allow the libc++abi demangler implementation to be an identical copy
of the llvm Demangle library, and would allow the LLVM implementation to reuse
LLVM components such as llvm::BumpPtrAllocator, but we'll need to decide how to
coordinate that with the MS ABI demangler, so I'm not doing that in this patch.

No functionality change intended other than the behavior of dump().

Reviewers: erik.pilkington, zturner, chandlerc, dlj

Subscribers: aheejin, llvm-commits

Differential Revision: https://reviews.llvm.org/D50930

llvm-svn: 340207
2018-08-20 20:14:49 +00:00
Richard Smith dc64b9c8e4 Factor Node creation out of the demangler. No functionality change intended.
(This is a port of llvm r339944 to libcxxabi.)

llvm-svn: 339952
2018-08-16 22:04:36 +00:00
Yvan Roux d8f100a6f5 [libcxxabi] Fix test_exception_address_alignment test for ARM
Check _LIBCXXABI_ARM_EHABI macro instead of libunwind version.

Fixes PR34182

Differential revision: https://reviews.llvm.org/D50170

llvm-svn: 339865
2018-08-16 11:38:09 +00:00
Erik Pilkington ac6a801cca [itanium demangler] Add llvm::itaniumFindTypesInMangledName()
This function calls a callback whenever a <type> is parsed.

This is necessary to implement FindAlternateFunctionManglings in LLDB, which
uses a similar hack in FastDemangle. Once that function has been updated to use
this version, FastDemangle can finally be removed.

Differential revision: https://reviews.llvm.org/D50586

llvm-svn: 339580
2018-08-13 16:37:47 +00:00
Martin Storsjo 9b60b9289c Add missing _LIBCXXABI_FUNC_VIS to __gxx_personality_seh0
This was missed in SVN r337754.

llvm-svn: 339503
2018-08-11 19:36:06 +00:00
Erik Pilkington 90dc82e955 [itanium demangler] Support dot suffixes on block invocation functions
rdar://32378759

llvm-svn: 338747
2018-08-02 17:45:01 +00:00
Hans Wennborg f2eafcc816 Update version to 8.0.0svn
llvm-svn: 338564
2018-08-01 14:25:03 +00:00
Louis Dionne c8e84ff251 [libc++] Remove _LIBCPP_BUILDING_XXX macros, which are redundant since _LIBCPP_BUILDING_LIBRARY
Summary: As suggested by Marshall in https://reviews.llvm.org/D49914

Reviewers: mclow.lists, EricWF

Subscribers: christof, dexonsmith, cfe-commits

Differential Revision: https://reviews.llvm.org/D50008

llvm-svn: 338475
2018-08-01 02:08:59 +00:00
Erik Pilkington 256db4b799 [demangler] Fix an oss-fuzz bug from r338138
Stack overflow on invalid. While collapsing references, we were skipping over a
cycle check in ForwardTemplateReference leading to a stack overflow. This commit
fixes the problem by duplicating the cycle check in ReferenceType.

llvm-svn: 338190
2018-07-28 04:06:30 +00:00
Erik Pilkington 3a6fed4a7b [demangler] Support for reference collapsing
llvm.org/PR38323

llvm-svn: 338138
2018-07-27 17:27:40 +00:00
Sam Clegg 77c99ee5d9 [CMake] Don't use LIBCXXABI_ENABLE_STATIC option before its declared
Summary:
rL337867 introduced two new cmake_dependent_option options:
- LIBCXXABI_INSTALL_STATIC_LIBRARY
- LIBCXXABI_INSTALL_SHARED_LIBRARY

They depend on LIBCXXABI_ENABLE_STATIC and LIBCXXABI_ENABLE_SHARED
and so therefore need to (it seems) come after the declaration of
these two options.

Subscribers: mgorny, aheejin, christof, ldionne, cfe-commits

Differential Revision: https://reviews.llvm.org/D49825

llvm-svn: 337982
2018-07-25 23:13:00 +00:00
Petr Hosek cbb4313b1c [CMake] Use LIBCXXABI_LIBDIR_SUFFIX in libc++abi build
This was changed unintentionally in r335809.

Differential Revision: https://reviews.llvm.org/D49765

llvm-svn: 337937
2018-07-25 16:51:00 +00:00
Eric Fiselier a596ea5842 Fix dangling reference in test
llvm-svn: 337906
2018-07-25 11:19:13 +00:00
Petr Hosek 4a1e14ea78 [CMake] Option to control whether shared/static library is installed
Currently it's only possible to control whether shared or static library
build of libc++, libc++abi and libunwind is enabled or disabled and
whether to install everything we've built or not. However, it'd be
useful to have more fine grained control, e.g. when static libraries are
merged together into libc++.a we don't need to install libc++abi.a and
libunwind.a. This change adds this option.

Differential Revision: https://reviews.llvm.org/D49573

llvm-svn: 337867
2018-07-24 23:27:51 +00:00
Petr Hosek 058c04c3dd Reland "[CMake] Support statically linking dependencies only to shared or static library"
This is a reland of commit r337668.

llvm-svn: 337814
2018-07-24 07:06:17 +00:00
Erik Pilkington 28e08a0a61 [demangler] call terminate() if allocation failed
We really should set *status to memory_alloc_failure, but we need to refactor
the demangler a bit to properly propagate the failure up the stack. Until then,
its better to explicitly terminate then rely on a null dereference crash.

rdar://31240372

llvm-svn: 337759
2018-07-23 22:23:04 +00:00
Martin Storsjo 64142ba98b Implement a GCC compatible SEH unwinding personality, __gxx_personality_seh0
This allows handling SEH based exceptions, with unwind functions
provided by libgcc.

Differential Revision: https://reviews.llvm.org/D49638

llvm-svn: 337754
2018-07-23 22:09:23 +00:00
Petr Hosek 781ee0bc5a Revert "[CMake] Support statically linking dependencies only to shared or static library"
This reverts commit r337668: broke the cxxabi build when using Make.

llvm-svn: 337670
2018-07-23 05:07:44 +00:00
Petr Hosek 7a0295cbc8 [CMake] Support statically linking dependencies only to shared or static library
Currently it's possible to select whether to statically link unwinder
or the C++ ABI library, but this option applies to both the shared
and static library. However, in some scenarios it may be desirable to
only statically link unwinder and C++ ABI library into static C++
library since for shared C++ library we can rely on dynamic linking
and linker scripts. This change enables selectively enabling or
disabling statically linking only to shared or static library.

Differential Revision: https://reviews.llvm.org/D49502

llvm-svn: 337668
2018-07-23 04:19:55 +00:00
Eric Fiselier 6fa95b8787 Add GCC 9 to XFAILs list for test
llvm-svn: 337662
2018-07-22 21:58:46 +00:00
Zachary Turner 0e3fbf6b8b Merge changes to ItaniumDemangle over to libcxxabi.
ItaniumDemangle had a small NFC refactor to make some of its
code reusable by the newly added Microsoft demangler.  To keep
the libcxxabi demangler as close as possible to the master copy
this refactor is being merged over.

Differential Revision: https://reviews.llvm.org/D49575

llvm-svn: 337582
2018-07-20 17:16:49 +00:00
Petr Hosek 6aae861e0e [CMake] Set per-runtime library directory suffix in runtimes build
Do not use LLVM_RUNTIMES_LIBDIR_SUFFIX variable which is an internal
variable used by the runtimes build from individual runtimes, instead
set per-runtime librarhy directory suffix variable which is necessary
for the sanitized runtimes build to install libraries into correct
location.

Differential Revision: https://reviews.llvm.org/D49121

llvm-svn: 336713
2018-07-10 19:13:33 +00:00
Serge Pavlov 2f17e969e4 [demangler] Avoid alignment warning
The alignment specified by a constant for the field
`BumpPointerAllocator::InitialBuffer` exceeded the alignment
guaranteed by `malloc` and `new` on Windows. This change set
the alignment value to that of `long double`, which is defined
by the used platform.

It fixes https://bugs.llvm.org/show_bug.cgi?id=37944.

Differential Revision: https://reviews.llvm.org/D48889

llvm-svn: 336312
2018-07-05 06:24:29 +00:00
Erik Pilkington 988a16af92 Revert r336159, r336157. Some bots failed on qualified std::max_align_t, and other on unqualified max_align_t.
I'll take another stab at this tomorrow. Any ideas for fixing this would be appreciated!

http://lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/23071/steps/build_Lld/logs/stdio
http://lab.llvm.org:8011/builders/clang-with-thin-lto-ubuntu/builds/11185/steps/build-stage1-compiler/logs/stdio

llvm-svn: 336162
2018-07-03 01:30:53 +00:00
Erik Pilkington 0409a8ade7 Some buildbots were choking on std::max_align_t, try using the global alias.
llvm-svn: 336159
2018-07-03 00:48:27 +00:00
Erik Pilkington d26ace3955 [demangler] Fix a MSVC alignment warning.
This should fix llvm.org/PR37944

llvm-svn: 336157
2018-07-03 00:23:18 +00:00
Shoaib Meenai 51d5cc9228 [libc++abi] Look for __config instead of vector
vector is a generic C++ header, whereas __config is libc++-specific, so
we can look for it instead to guarantee we're finding a libc++
installation. This was suggested by Eric in https://reviews.llvm.org/D48694.

This is less important now that we're limiting the header search to the
specified directories (which definitely shouldn't have any other C++
library's headers anyway), but it shouldn't hurt either. There's a
chance some other library could also be providing a __config header, so
there's still a trade-off there. It would be ideal if we could check for
the presence of both __config and vector in the same directory, but
there doesn't seem to be any easy way to do that in CMake.

llvm-svn: 336034
2018-06-30 01:25:47 +00:00
Shoaib Meenai 777ec37659 [libc++abi] Limit libc++ header search to specified paths
Right now, when libc++abi is locating libc++ headers, it specifies
several search locations, but it also doesn't prevent CMake from looking
for those headers in system directories. I don't know if this was
intentional or an oversight, but it has several issues:

* We're looking specifically for the vector header, which could just as
  easily be found in a libstdc++ (or other C++ library) installation.
* No system I know of places their C++ headers directly in system
  include directories (they're always under a C++ subdirectory), so the
  system search will never succeed.
* find_path searches system paths before the user-specified PATHS, so
  if some system does happen to have C++ headers in its system include
  directories, those headers will be preferred, which doesn't seem
  desirable.

It makes sense to me to limit this header search to the explicitly
specified paths (using NO_DEFAULT_PATH, as is done for the other
find_path call in this file), but I'm putting it up for review in case
there's some use case I'm not thinking of.

Differential Revision: https://reviews.llvm.org/D48694

llvm-svn: 336032
2018-06-30 01:04:50 +00:00
Petr Hosek 887f26d470 Support for multiarch runtimes layout
This change adds a support for multiarch style runtimes layout, so in
addition to the existing layout where runtimes get installed to:

lib/clang/$version/lib/$os

Clang now allows runtimes to be installed to:

lib/clang/$version/$target/lib

This also includes libc++, libc++abi and libunwind; today those are
assumed to be in Clang library directory built for host, with the
new layout it is possible to install libc++, libc++abi and libunwind
into the runtime directory built for different targets.

The use of new layout is enabled by setting the
LLVM_ENABLE_RUNTIME_TARGET_DIR CMake variable and is supported by both
projects and runtimes layouts. The runtimes CMake build has been further
modified to use the new layout when building runtimes for multiple
targets.

Differential Revision: https://reviews.llvm.org/D45604

llvm-svn: 335809
2018-06-28 03:11:52 +00:00
Martin Storsjo dd75eb531d [CMake] Convert paths to the right form in standalone builds on Windows
The paths output from llvm-config --cmakedir and from clang
--print-libgcc-file-name can contain backslashes, while CMake
can't handle the paths in this form.

This matches what compiler-rt already does (since SVN r203789
and r293195).

Differential Revision: https://reviews.llvm.org/D48355

llvm-svn: 335171
2018-06-20 20:59:18 +00:00
Paul Robinson 7555c589af Update copyright year to 2018.
llvm-svn: 334936
2018-06-18 12:22:17 +00:00
Vitaly Buka e26d5f4b12 Fix libcxxabi tests after clang r334924
llvm-svn: 334926
2018-06-18 06:43:55 +00:00
Vitaly Buka db666a44e7 Fix libcxx tests after clang r334677.
llvm-svn: 334924
2018-06-18 06:24:29 +00:00
Eric Fiselier 29e0265732 private_typeinfo: limit is_dst_type_derived_from_static_type optimization
Patch by Ryan Prichard

If the destination type does not derive from the static type, we can skip
the search_above_dst call, but we still need to run the
!does_dst_type_point_to_our_static_type block of code. That block of code
will increment info->number_to_dst_ptr to 2, and because dest isn't derived
from static, the cast will ultimately fail.

Fixes PR33439

Reviewed as https://reviews.llvm.org/D36447

llvm-svn: 332767
2018-05-18 20:51:38 +00:00
Eric Fiselier 4938d48f09 private_typeinfo: propagate static flags in vmi search_above_dst method
This adds the test which was mistakenly not committed in r332763.

Patch by Ryan Prichard

Propagate the found_our_static_ptr and found_any_static_type flags from
__vmi_class_type_info::search_above_dst to its caller.

Fixes PR33425 and PR33487

Reviewed as https://reviews.llvm.org/D36446

llvm-svn: 332764
2018-05-18 20:42:53 +00:00
Eric Fiselier 77eaa59cd2 private_typeinfo: propagate static flags in vmi search_above_dst method
Patch by Ryan Prichard

Propagate the found_our_static_ptr and found_any_static_type flags from
__vmi_class_type_info::search_above_dst to its caller.

Fixes PR33425 and PR33487

Reviewed as https://reviews.llvm.org/D36446

llvm-svn: 332763
2018-05-18 20:39:57 +00:00
Nico Weber 377d68fd2c Fix test failure for missing _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
This is a follow-up change to r331150. The CL moved the macro from individual
file to build file, but the macro is missed in a test config file.

https://reviews.llvm.org/D46385
Patch from Taiju Tsuiki <tzik@chromium.org>!

llvm-svn: 331450
2018-05-03 12:44:27 +00:00
Nico Weber 297ec32b86 Move _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS macro to build system
_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS is currently used to
bring back std::unexpected, which is removed in C++17, but still needed
for libc++abi for backward compatibility.

This macro used to define in cxa_exception.cpp only, but actually
needed for all sources that touches exceptions.
So, a build-system-level macro is better fit to define this macro.

https://reviews.llvm.org/D46056
Patch from Taiju Tsuiku <tzik@chromium.org>!

llvm-svn: 331150
2018-04-29 23:05:11 +00:00
Eli Friedman 17a47b915a [libc++abi] Replace __sync_* functions with __libcpp_atomic_* functions.
This is basically part 2 of r313694.

It's a little unfortunate that I had to copy-paste atomic_support.h,
but I don't really see any alternative.

The refstring.h changes are the same as the libcxx changes in r313694.

llvm-svn: 330162
2018-04-16 22:00:14 +00:00
Erik Pilkington f2a9b0fdda [demangler] NFC: Some refactoring to support partial demangling.
I'm committing this to libcxxabi too so that the two demanglers remain as
simular as possible.

llvm-svn: 329950
2018-04-12 20:41:06 +00:00
Vlad Tsyrklevich b89e9b5e2f [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
2018-04-09 22:11:28 +00:00
Erik Pilkington d43931dcb8 [demangler] Support for fold expressions.
llvm-svn: 329601
2018-04-09 18:33:01 +00:00
Erik Pilkington 452e2ef996 [demangler] Support for <data-member-prefix>.
llvm-svn: 329600
2018-04-09 18:32:25 +00:00
Erik Pilkington 650130ac04 [demangler] Support for partially substituted sizeof....
llvm-svn: 329599
2018-04-09 18:31:50 +00:00
Petr Hosek 86a9ddcd1a [CMake] Support for monorepo layout
Support finding libcxx and libunwind sources in monorepo style layout.

Differential Revision: https://reviews.llvm.org/D45269

llvm-svn: 329208
2018-04-04 17:40:59 +00:00
Erik Pilkington 615e753e09 [demangler] Fix a bug in r328464 found by oss-fuzz.
llvm-svn: 328507
2018-03-26 15:34:36 +00:00
Erik Pilkington 8a1cb33ba5 [demangler] Use a back-patching scheme to resolve forward references.
Strictly in a conversion operator's type, a <template-param> refers to a
<template-arg> that is further ahead in the mangled name. Instead of
doing a second parse to resolve these, introduce a
ForwardTemplateReference Node and back-patch the referenced
<template-arg> when we're in the right context.

This is also a correctness fix, previously we would only do a second
parse if the <template-param> was out of bounds in the current set of
<template-args>. This lead to misdemangles (gasp!) when the conversion
operator was a member of a templated struct, for instance.

llvm-svn: 328464
2018-03-25 22:50:33 +00:00
Erik Pilkington 8c7013d4ca [demangler] Tweak how parameter pack sizes are determined.
Rather than eagerly propagating up parameter pack sizes in Node ctors,
find the parameter pack size during printing. This is being done to
support back-patching forward referencing <template-param>s.

llvm-svn: 328463
2018-03-25 22:49:57 +00:00
Erik Pilkington c728786b1d [demangler] Support for clang's enable_if attribute.
Fixes PR33569.

llvm-svn: 328462
2018-03-25 22:49:16 +00:00
Erik Pilkington e9c2a3c565 [demangler] Support for <template-param>s in generic lambdas.
These <template-param>s refer to "artifical" <template-arg>s that don't appear
in the mangled name, so we just print them as "auto".

llvm-svn: 327690
2018-03-16 03:06:30 +00:00
Erik Pilkington 4fb6f8189f [demangler] Simplify printing of structured bindings.
Thanks to Richard Smith for the post-commit review!

llvm-svn: 327228
2018-03-10 22:33:49 +00:00
Erik Pilkington fcc9a80241 [demangler] Support for sequence numbers on lifetime extended temporaries.
llvm-svn: 327227
2018-03-10 21:31:22 +00:00
Erik Pilkington b1a7f3c741 [demangler] Support for structured bindings.
llvm-svn: 327226
2018-03-10 21:31:15 +00:00
Erik Pilkington bec42c848d [demangler] Fix a mistake in r326797.
Thanks to Nico Weber for pointing this out!

llvm-svn: 326871
2018-03-07 04:29:33 +00:00
Erik Pilkington 98e7036587 [demangler] Modernize the rest of the demangler.
llvm-svn: 326797
2018-03-06 14:21:10 +00:00
Erik Pilkington 4352d7221c [demangler] Modernize parse_unresolved_name.
llvm-svn: 326796
2018-03-06 14:21:08 +00:00
Erik Pilkington 3402e876ef [demangler] Modernize parse_name.
llvm-svn: 326717
2018-03-05 16:35:06 +00:00
Erik Pilkington 0bae6d8c14 [demangler] Support for exception specifications on function types.
llvm-svn: 325093
2018-02-14 01:08:20 +00:00
Erik Pilkington bb0e34558f [demangler] Simplify the AST for function types, NFC.
llvm-svn: 325092
2018-02-14 01:08:17 +00:00
Erik Pilkington b39094e39e [demangler] Support for inheriting constructors.
Fixes PR33223.

llvm-svn: 325023
2018-02-13 17:09:07 +00:00
Erik Pilkington aec1e58c99 [demangler] Rewrite parse_nested_name in the new style.
llvm-svn: 325022
2018-02-13 17:09:03 +00:00
Erik Pilkington 8b15f1f272 [demangler] Support for initializer lists and designated initializers.
llvm-svn: 324970
2018-02-13 00:15:56 +00:00
Erik Pilkington 8d2aca0697 [demangler] Support for dependent elaborate type specifiers.
llvm-svn: 324969
2018-02-13 00:15:53 +00:00
Erik Pilkington 94bd832518 [demangler] All <qualifiers> on one type should share one entry in the substitution table.
Previously, both <extended-qualifier>s and <CV-qualifiers> got their own entries.

llvm-svn: 324968
2018-02-13 00:15:46 +00:00
Richard Smith 8e6107a0e4 Fix compilation in C++17 mode.
C++17 removes `std::unexpected_handler`, but libc++abi needs it to define
`__cxa_exception`. When building against libc++, this is easily rectified by
telling libc++ we're building the library. We already do this in the other
places where we need these symbols.

Differential Revision: https://reviews.llvm.org/D42987

llvm-svn: 324542
2018-02-07 23:23:23 +00:00
Erik Pilkington 9cbd9bfaa5 [demangler] Refactor the type parser
Differential revision: https://reviews.llvm.org/D41889

llvm-svn: 324282
2018-02-05 22:41:20 +00:00
Erik Pilkington 0923542c61 [demangler] return early if conditional expr parsing failed
This should fix some bugs found by oss-fuzz.

llvm-svn: 324203
2018-02-05 02:34:41 +00:00
Erik Pilkington 4f052d075c [demangler] Clean up the expression parser
This commit cleans up the expression parser, using a new style:
  - parse* functions now return Node pointers.
  - The mangled name is now held in Db and accessed with look() and consume()
  - LLVM coding style

This style is meant to avoid the 2 most common types of bugs in the
old demanger, namely misusing the Names stack (ie, calling back() on
empty) and going out of bounds on the mangled name. I also think it
makes the demangler a lot cleaner.

Differential revision: https://reviews.llvm.org/D41887

llvm-svn: 324111
2018-02-02 18:04:32 +00:00
Erik Pilkington 862987abe7 [demangler] Improve variadic template support
This commit changes how variadic templates are represented in the
demangler, in order to fix some longstanding bugs. Now instead of
expanding variadic templates during parsing, the expansion is done
during printing by reusing the unexpanded AST. This allows the
demangler to handle cases where multiple packs contribute to a single
production, and correctly handle "Dp" and "sp" productions, which
corrispond to pack expansions in type and expression contexts.

Differential revision: https://reviews.llvm.org/D41885

llvm-svn: 323906
2018-01-31 20:17:06 +00:00
Don Hinton 4877063e19 [cmake] [libcxxabi] LLVM_FOUND isn't always set, so just test if
llvm_setup_rpath() is available instead.

llvm-svn: 323600
2018-01-27 19:18:04 +00:00
Don Hinton e3b3b8094d Reland:
[cmake] [libcxxabi] Call llvm_setup_rpath() when adding shared libraries.

Clang and llvm already use llvm_setup_rpath(), so this change will
help standarize rpath usage across all projects.

Differential Revision: https://reviews.llvm.org/D42460

llvm-svn: 323495
2018-01-26 03:41:58 +00:00
Don Hinton bc595f5702 Revert [libcxxabi] r323455 - [cmake] [libcxxabi] Call llvm_setup_rpath() when adding shared libraries.
Shoaib Meenai pointed out this will break standalone builds can be built without llvm.

Differential Revision: https://reviews.llvm.org/D42460

llvm-svn: 323458
2018-01-25 19:18:51 +00:00
Don Hinton 0106b4305f [cmake] [libcxxabi] Call llvm_setup_rpath() when adding shared libraries.
Clang and llvm already use llvm_setup_rpath(), so this change will
help standarize rpath usage across all projects.

Differential Revision: https://reviews.llvm.org/D42460

llvm-svn: 323455
2018-01-25 18:43:18 +00:00
Peter Collingbourne a674a8fd1e [libc++abi] Fix unused function when building with LIBCXXABI_SILENT_TERMINATE
This fixes:
src/cxa_default_handlers.cpp:25:13: error: unused function 'demangling_terminate_handler' [-Werror,-Wunused-function]

Patch by Thomas Anderson!

Differential Revision: https://reviews.llvm.org/D42399

llvm-svn: 323397
2018-01-25 01:38:43 +00:00
Don Hinton ae858bf65f [cmake] [libcxxabi] Fix find_path() problems when cross compiling
When CMAKE_SYSROOT or CMAKE_FIND_ROOT_PATH is set, cmake
recommends setting CMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY
globally which means find_path() always prepends CMAKE_SYSROOT or
CMAKE_FIND_ROOT_PATH to all paths used in the search.

However, these find_path() invocations are looking for paths in
the libcxx and libunwind projects on the host system, not the
target system, which can be done by passing
NO_CMAKE_FIND_ROOT_PATH.

Differential Revision: https://reviews.llvm.org/D41623

llvm-svn: 323145
2018-01-22 19:41:05 +00:00
Don Hinton 964ea50ff8 [cmake] [libcxxabi] Don't print warning when tests are disabled.
Summary:
Don't print, possibly erroneous, warning if
LIBCXXABI_INCLUDE_TESTS is false.

This patch fixes a problem introduced in r291367.

Differential Revision: https://reviews.llvm.org/D42229

llvm-svn: 322870
2018-01-18 18:29:36 +00:00
Eric Fiselier 6ae8abf241 Fix standalone test-suite run.
This patch updates libc++abi's HandleOutOfTreeLLVM.cmake to match
libc++'s -- and more importantly, to fix a bug where llvm-lit wasn't
found/created when libc++abi was built out-of-tree. This prevented
the test suite from running.

llvm-svn: 322768
2018-01-17 22:07:09 +00:00
Hans Wennborg 4ebc5ab7a5 Update version to 7.0.0svn
llvm-svn: 321726
2018-01-03 15:42:34 +00:00
Jonathan Roelofs 01b938279c Try again, this time with the correct address
llvm-svn: 321569
2017-12-29 19:26:28 +00:00
Jonathan Roelofs 8e8378ba77 Update CREDITS.txt with personal email address
llvm-svn: 321564
2017-12-29 19:16:12 +00:00
Petr Hosek 2ffea93c57 [libcxxabi] Pass LIBCXXABI_SYSROOT and LIBCXXABI_GCC_TOOLCHAIN to lit
These are expected to be set by the shared lit scripts used from libc++.

Differential Revision: https://reviews.llvm.org/D40818

llvm-svn: 320445
2017-12-12 01:20:37 +00:00
Ben Hamilton 4bf869c87e [libcxxabi] Set up .arcconfig to point to new Diffusion CXXA repository
Summary:
We want to automatically copy the appropriate mailing list
for review requests to the libc++abi repository.

For context, see the proposal and discussion here:

http://lists.llvm.org/pipermail/cfe-dev/2017-November/056032.html

Similar to D40500, I set up a new Diffusion repository with callsign
"CXXA" for libc++abi:

https://reviews.llvm.org/source/libcxxabi/

This explicitly updates libcxxabi's .arcconfig to point to the new
CXX repository in Diffusion, which will let us use Herald rule H268.

Reviewers: phosek, beanz, EricWF, compnerd

Reviewed By: phosek

Subscribers: cfe-commits, klimek, sammccall, dlj, bkramer

Differential Revision: https://reviews.llvm.org/D40501

llvm-svn: 319713
2017-12-04 23:14:03 +00:00
Shoaib Meenai acee992852 [libc++abi] Add install-cxxabi-stripped target
LLVM is gaining install-*-stripped targets to perform stripped installs,
and in order for this to be useful for install-distribution, all
potential distribution components should have stripped installation
targets. LLVM has a function to create these install targets, but since
we can't use LLVM CMake functions in libc++abi, let's do it manually.

Differential Revision: https://reviews.llvm.org/D40681

llvm-svn: 319499
2017-11-30 23:25:51 +00:00
Akira Hatanaka 9ef1daa46e Insert padding before the __cxa_exception header to ensure the thrown
object is sufficiently aligned.

r303175 annotated field unwindHeader of __cxa_exception with attribute
'aligned' to ensure the thrown object following the __cxa_exception
header was sufficiently aligned. This caused changes in the field
offsets of __cxa_exception relative to the start of the thrown object,
which was an ABI breaking change for some clients.

Instead of annotating field unwindHeader, this commit inserts extra
space before the header. This ensures the thrown object following the
header is sufficiently aligned without changing the field offsets, thus
avoiding any ABI breakages.

rdar://problem/25364625
rdar://problem/35556163

llvm-svn: 319123
2017-11-28 00:36:29 +00:00
Erik Pilkington 24d6534038 [demangler] Support for abi_tag attribute
Differential revision: https://reviews.llvm.org/D40279

llvm-svn: 318874
2017-11-22 20:38:22 +00:00
Erik Pilkington 1b7f8d5b04 [demangler] Document some features that the demangler doesn't yet support, NFC
llvm-svn: 318765
2017-11-21 15:04:08 +00:00
Petr Hosek aa96d2ebbc [libcxxabi][CMake] Provide option to disable installing of the library
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
2017-11-17 23:25:09 +00:00
Petr Hosek 56a1f07156 [CMake][libcxxabi] Support merging objects when statically linking unwinder
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
2017-11-17 22:49:39 +00:00
Stephan Bergmann 511c284b82 Remove excess whitespace from syslog message; NFC
llvm-svn: 318043
2017-11-13 15:40:31 +00:00
Eric Fiselier c4600ccf89 Fix ASAN build with older compiler-rt versions.
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
2017-09-14 22:37:34 +00:00
Eric Fiselier 8635f7d2c6 [libc++abi] Fix ASAN build with older compiler-rt versions.
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
2017-09-14 22:19:28 +00:00
Petr Hosek 229e0854ed Reland "When built with ASan, __cxa_throw calls __asan_handle_no_return"
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
2017-09-13 23:35:07 +00:00
Petr Hosek a69a3a3f62 Revert "[libcxxabi] When built with ASan, __cxa_throw calls __asan_handle_no_return"
This reverts commit r312606 because it's causing an error on
libcxx-libcxxabi-x86_64-linux-ubuntu-asan bot.

llvm-svn: 312609
2017-09-06 03:00:42 +00:00
Petr Hosek 53335d6d86 [libcxxabi] When built with ASan, __cxa_throw calls __asan_handle_no_return
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
2017-09-06 02:43:54 +00:00
Petr Hosek ce7aa6f2bd Revert "[libcxxabi] When built with ASan, __cxa_throw calls __asan_handle_no_return"
This reverts commit r311045 because it's causing an error on
libcxx-libcxxabi-x86_64-linux-ubuntu-asan bot.

llvm-svn: 311047
2017-08-16 22:05:54 +00:00
Petr Hosek 00135562e5 [libcxxabi] When built with ASan, __cxa_throw calls __asan_handle_no_return
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
2017-08-16 21:58:09 +00:00
Erik Pilkington a95eae2d4b [demangler] Fix some more -Wshadow warnings I missed in r310535
llvm-svn: 310546
2017-08-10 02:48:13 +00:00
Erik Pilkington f514ccadbd [demangler] Fix a bunch of -Wshadow warnings
These were causing failures in -Werror builds.

llvm-svn: 310535
2017-08-09 22:45:35 +00:00
Erik Pilkington 7377525fce Mark test as unsupported c++98/03 to fix buildbots
llvm-svn: 310530
2017-08-09 21:51:56 +00:00
Erik Pilkington ab04a08c49 [demangler] Improve representation of substitutions/templates
Differential revision: https://reviews.llvm.org/D36427

llvm-svn: 310525
2017-08-09 21:30:57 +00:00
Erik Pilkington 512253292c [demangler] Rename some variables, NFC
llvm-svn: 310415
2017-08-08 20:57:10 +00:00
Shoaib Meenai 1285013dbe [libc++abi] Use proper calling convention for TLS destructor
This is needed when using Windows threading.

llvm-svn: 310329
2017-08-08 00:54:33 +00:00
Erik Pilkington 39dc8800c1 [demangler] Fix another oss-fuzz bug
llvm-svn: 310226
2017-08-06 20:46:33 +00:00
Erik Pilkington 906d585686 [demangler] Fix another bug found by oss-fuzz in r309340
llvm-svn: 309650
2017-08-01 02:38:41 +00:00
Erik Pilkington deec87836a [demangler] Use _LIBCPP_UNREACHABLE()
llvm-svn: 309649
2017-08-01 02:38:40 +00:00
NAKAMURA Takumi 83105a4ae1 libcxxabi: Suppress LLVM_ENABLE_MODULES
Differential Revision: https://reviews.llvm.org/D35542

llvm-svn: 309551
2017-07-31 09:35:08 +00:00
Erik Pilkington 39bbe2f5de [demangler] Fix some bugs in r309340 found by oss-fuzz
llvm-svn: 309520
2017-07-30 20:09:55 +00:00
Erik Pilkington fe33551051 [demangler] Fix some overzealous -Wreturn-type errors
llvm-svn: 309349
2017-07-28 01:35:14 +00:00
Erik Pilkington bdfd1228f6 [demangler] Attempt to fix linux bots, include <cstdio>
llvm-svn: 309342
2017-07-28 00:53:30 +00:00
Erik Pilkington 94d2ac7160 [demangler] Use an AST to represent demangled names
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
2017-07-28 00:43:49 +00:00
Hans Wennborg a25946c8e8 Update version to 6.0.0svn
llvm-svn: 308461
2017-07-19 13:42:18 +00:00
Erik Pilkington 28a4d0b981 [demangler] Respect try_to_parse_template_args
Fixes an exponential parse found by oss-fuzz.

llvm-svn: 307941
2017-07-13 19:37:37 +00:00
Eric Fiselier 84800d999c Remove dependancy on __refstring header; use local copy instead.
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
2017-07-12 01:34:21 +00:00
Petr Hosek 60fe5792ae [libcxxabi][CMake] Add install path variable to allow overriding the destination
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
2017-07-11 01:42:26 +00:00
Erik Pilkington c113b96ec4 [Demangler] NFC: Don't make the parse_* functions templates
Differential revision: https://reviews.llvm.org/D35158

llvm-svn: 307482
2017-07-08 18:54:08 +00:00
Erik Pilkington ffac67419b [Demangler] NFC: Move Db struct to beginning of file
Differential revision: https://reviews.llvm.org/D35158

llvm-svn: 307481
2017-07-08 18:54:07 +00:00
Eric Fiselier ce02c1bc15 Fix incomplete type test on OS X; workaround weird DYLD_LIBRARY_PATH behavior
llvm-svn: 307230
2017-07-06 00:29:09 +00:00
Marshall Clow f74609b15f Add some catch(...) blocks to the tests so that if they fail, we get a good error message. No functional change.
llvm-svn: 305977
2017-06-22 00:49:03 +00:00
Eric Fiselier 187fd40ca4 Use _LIBCPP_FALLTHROUGH() to avoid warnings about [[gnu::fallthrough]] being unsupported
llvm-svn: 305500
2017-06-15 20:18:10 +00:00
Ismail Donmez dea7590a04 Set a default value for LIBCXXABI_LIBDIR_SUFFIX, fixes installing into lib64 after r304374
llvm-svn: 305278
2017-06-13 08:16:44 +00:00
Saleem Abdulrasool cf0e48ca01 build: use cmake to pass -std=c++11
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
2017-06-11 23:59:26 +00:00
Saleem Abdulrasool e3568b4b3d build: use POSITION_INDEPENDENT_CODE CMake property
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
2017-06-11 23:59:24 +00:00
Saleem Abdulrasool d1c2302fc5 cxa_demangle: fix -Wimplicit-fallthrough for GCC:7
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
2017-06-11 22:57:31 +00:00
Saleem Abdulrasool 52bb919615 private_typeinfo: add missing field initializers
Cleanup the -Wmissing-field-initializers warnings from gcc:7 builds.
NFC.

llvm-svn: 305172
2017-06-11 22:57:26 +00:00
Martell Malone 2fdf185bea [libcxxabi] HandleLLVMOptions in out of tree build
Differential revision: https://reviews.llvm.org/D33753

llvm-svn: 304664
2017-06-03 17:23:19 +00:00
Martell Malone 062f8f00ae [libcxxabi] Rework CMakeLists.txt into modules
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
2017-06-01 00:09:20 +00:00
Eric Fiselier 27db230ab0 Remove requirement for libunwind sources. Patch by Shiz.
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
2017-05-31 22:11:42 +00:00
Erik Pilkington a34ea7583f [demangler] Fix a exponential string copying bug
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
2017-05-28 23:15:50 +00:00
Martell Malone 41119cd07b [libcxxabi] Disable DLL annotations on static
rL288692 renames
_LIBCXXABI_DISABLE_DLL_IMPORT_EXPORT to
_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS

llvm-svn: 304110
2017-05-28 22:46:50 +00:00
Martell Malone fedd33f155 [libcxxabi] iconv is not needed for mingw-w64
llvm-svn: 304026
2017-05-26 19:39:39 +00:00
Erik Pilkington 00efd50476 [Demangler] Remove a failing assert introduced in r303718
llvm-svn: 303806
2017-05-24 20:53:13 +00:00
Tamas Berghammer 8bc9b88a24 __cxa_demangle: Fix constructor cv qualifier handling
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
2017-05-24 11:21:34 +00:00
Erik Pilkington 17dfebcc39 [demangler] Fix a crash in the demangler during parsing of a lamdba
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
2017-05-24 05:44:19 +00:00
Akira Hatanaka 7d5d9dc18a [libcxxabi] Fix the test case committed in r303175.
Free the __cxa_exception object allocated with __cxa_allocate_exception.

This is an attempt to fix this asan bot:

http://lab.llvm.org:8011/builders/libcxx-libcxxabi-x86_64-linux-ubuntu-asan/builds/560

llvm-svn: 303194
2017-05-16 18:18:03 +00:00
Akira Hatanaka 0c1016a337 [libcxxabi] Align unwindHeader on a double-word boundary.
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
2017-05-16 15:19:08 +00:00
Akira Hatanaka c1c78617e7 Revert r302978 and r302981.
Revert the two commits to understand why the following aarch64 bot is
failing.

http://lab.llvm.org:8011/builders/libcxx-libcxxabi-libunwind-aarch64-linux

llvm-svn: 303016
2017-05-14 18:46:19 +00:00
Akira Hatanaka c57477b2bd [libcxxabi] Do not align field unwindHeader when building for ARM EHABI.
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
2017-05-13 06:28:17 +00:00
Akira Hatanaka c501f754a5 [libcxxabi] Align unwindHeader on a double-word boundary.
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
2017-05-13 03:14:49 +00:00