Sink the Db initialization into the structure rather than out-of-line at the
declaration size. This just makes it easier to see what initialization is being
performed. NFC.
llvm-svn: 287364
The block invocation function uses an extension where the prefix is ___Z
as opposed to _Z. This should make the tests pass again.
Disable a negative test which was testing a crasher. The symbol being
demangled is not a valid mangled symbol and will return a nullptr.
Adjust the type info decoding test to be a valid symbol name.
llvm-svn: 286793
Ensure that we have a mangled symbol before attempting to demangle it. We would
previously treat any input as a mangled symbol rather than checking that the
symbol has the initial C++ Itanium v3 mangling prefix of `_Z`. This changes the
behaviour from the previous case which would undecorate `f` to `float` rather
than nullptr as it should.
Unfortunately, we do not have any negative testing for the demangler.
llvm-svn: 286788
GCC 4.7 or newer emits 0x90 (indirect | pcrel) as the ttype encoding.
This would hit an assertion in cxa_personality.cpp. This commit fixes
the problem by relaxing the assertion.
llvm-svn: 286760
This patch refactors all pthread uses of libc++abi into a separate API. This
is the first step towards supporting an externlly-threaded libc++abi library.
I've followed the conventions already used in the libc++ library for the same
purpose.
Patch from: Saleem Abdulrasool and Asiri Rathnayake
Reviewed by: compnerd, EricWF
Differential revisions:
https://reviews.llvm.org/D18482 (original)
https://reviews.llvm.org/D24864 (final)
llvm-svn: 284128
Throwing an exception for the first time may lead to call calloc to
allocate memory for __cxa_eh_globals. If the memory pool is exhausted
at that moment, it results in abnormal termination of the program.
This patch addresses the issue by using fallback_malloc in that case.
In this revision, some restrictions were added into the test to not
run it in unsuitable environments.
Differential Revision: https://reviews.llvm.org/D17815
llvm-svn: 283531
Throwing an exception for the first time may lead to call calloc to
allocate memory for __cxa_eh_globals. If the memory pool is exhausted
at that moment, it results in abnormal termination of the program.
This patch addresses the issue by using fallback_malloc in that case.
Differential Revision: https://reviews.llvm.org/D17815
llvm-svn: 282692
These data and text symbols were missing annotations for building with hidden
visibility. As we do not currently enable hidden visibility by default, this is
a NFC for the buildbots.
llvm-svn: 282300
is_initialized is only used in the no threads case or if on non ARM Apple
targets. Use the preprocessor to remove the function otherwise. NFC.
llvm-svn: 280286
This patch (and commit summary) mirror r279675 by Chris B which was applied
to libc++ but not libc++abi.
Summary:
The point of this patch is to have a consistent convention for naming build,
check and install targets so that the targets can be constructed from the
project name.
This change renames a bunch of CMake components and targets from libcxxabi to
cxxabi. For each renamed target I've added a convenience target that matches
the old target name and depends on the new target. This will preserve function
of the old targets so that the change doesn't break the world. We can evaluate
if it is worth removing the extra targets later.
llvm-svn: 279938
This patch applies changes similar to those in r279515 to libc++abi.
Summary of changes in this patch:
* Renamed variable LLVM_CONFIG -> LLVM_CONFIG_PATH
* Renamed variable LIBCXXABI_BUILT_STANDALONE -> LIBCXXABI_STANDALONE_BUILD
* Add an include of AddLLVM in the tests subdirectory for add_lit_testsuite.
llvm-svn: 279936
When using libunwind and not building as standalone project, we
can directly depend on the unwind library target.
Differential Revision: https://reviews.llvm.org/D23289
llvm-svn: 278169
When using libunwind and not building as standalone project, we
need to add LLVM library directory to the list of linker directories
to ensure it can find libunwind dependency.
Differential Revision: https://reviews.llvm.org/D23287
llvm-svn: 278076
pointer-to-member type, produce a null value of the right type.
This fixes a bug where throwing an exception of type nullptr_t and catching it
as a pointer-to-member would not guarantee to produce a null value in the catch
handler. The fix is pretty simple: we statically allocate a constant null
pointer-to-data-member representation and a constant null
pointer-to-member-function representation, and produce the address of the
relevant value as the adjusted pointer for the exception.
llvm-svn: 276016
Currently there is only support for a -fno-exceptions libc++ build. This is
problematic for functions such as std::terminate() which are defined in
libc++abi and using any of those functions throws away most of the benefits
of using -fno-exceptions (code-size). This patch introduces a -fno-exceptions
libc++abi build to address this issue.
This new variant of libc++abi cannot be linked against any with-exceptions
code as some symbols necessary for handling exceptions are missing in this
library.
Differential revision: http://reviews.llvm.org/D20677
Reviewers: EricWF, mclow.lists, bcraig
llvm-svn: 271267
Enable building libc++abi with hidden visibility by default. The ABI mandated
interfaces (and a few extra) are already set up to be externally visible. This
allows us to ensure that any implementation details are not leaked.
llvm-svn: 270816
This patch re-commits r256322 and r256323. They were reverted due to a OS X
test failure. The test failure has been fixed by libc++ commit r258217.
This patch also adds some additional tests.
llvm-svn: 258249
This patch re-commits r256322 and r256323. They were reverted due to a OS X
test failure. The test failure has been fixed by libc++ commit r258217.
This patch also adds some additional tests.
llvm-svn: 258222
This commit adds SHF_ALLOC and SHF_EXECINSTR section flags to
`.text.__cxa_end_cleanup` section. This fixes a link error when we are
using integrated-as and `ld.gold` (with `-Wl,--gc-sections` and
`-Wl,--fatal-warnings`.)
Detailed Explanation:
1. There might be some problem with LLVM integrated-as. It is not
emitting any section flags for text sections. (This will be fixed in
an independent commit.)
2. `ld.gold` will skip the external symbols in the section without
SHF_ALLOC. This is the reason why `.text.__cxa_end_cleanup_impl`
section is discarded even though it is referenced by
`__cxa_end_cleanup()`.
This commit workaround the problem by specifying the section flags
explicitly.
Fix http://llvm.org/PR21292
llvm-svn: 256241
Summary:
libgcc_eh.a cannot be used when building libc++abi as a shared library (the default configuration). See this post for some more discussion: https://gcc.gnu.org/ml/gcc/2012-03/msg00104.html
This patch reverts back to using libgcc_s when linking libc++abi.so.
Reviewers: danalbert, chandlerc, mclow.lists, ismail, compnerd
Subscribers: vkalintiris, cfe-commits
Differential Revision: http://reviews.llvm.org/D15440
llvm-svn: 255559
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
Use `__builtin_offsetof` in place of `offsetof`. Certain environments provide a
macro definition of `offsetof` which may end up causing issues. This was
observed on Windows. Use `__builtin_offsetof` to ensure correct evaluation
everywhere. NFC.
llvm-svn: 253435
libstdc++ needs a few typedefs in malloc_alloc. MSVC's STL needs rebind(),
construct(), destroy(). MSVC2013 also has no snprintf, but it exists in 2015.
llvm-svn: 248129
When using SjLj EH, do not use __builtin_eh_return_regno, map directly to the
ID. This would work on some targets, particularly those where the non-SjLj EH
personality used the same register mapping (0 -> 0, 1 -> 1). However, this is
not guaranteed. Avoiding the use of the builtin enables the use of libc++ with
SjLj EH on all targets.
llvm-svn: 248108
Summary:
Currently you can't install libc++abi from within the LLVM tree without installing all of LLVM. This patch adds an install rule for libc++abi.
Reviewers: danalbert, compnerd, rengolin, beanz
Subscribers: martell, beanz, jroelofs, cfe-commits
Differential Revision: http://reviews.llvm.org/D11682
llvm-svn: 245461
Summary:
Patch by Nitesh Jain and Jaydeep Patil with a small revision to use ABIs rather
than Architecture Revisions (which currently imply particular ABIs).
Fixes test_demangle.pass.cpp (PR24149).
Subscribers: mclow.lists, jaydeep, nitesh.jain, hans, cfe-commits
Differential Revision: http://reviews.llvm.org/D11483
llvm-svn: 243645
This silences some conversion warnings from GCC 4.9.2. Simply casting the RHS
doesn't seem to be sufficient to silence the warning. Convert the operation
equal operator usage to calculation and assignment.
llvm-svn: 238945
As a step to fix libunwind unw_step(), a new function
__gnu_unwind_frame() has been introduced to libunwind, and it is
required to use this function so that some libunwind internal data
structure can be updated properly.
llvm-svn: 238561
Function pointers and member function pointers cannot be converted to void*.
libc++abi incorrectly allows this conversion for function pointers.
Review URL: http://reviews.llvm.org/D8811
llvm-svn: 236299
This papers over a layering violation currently between libc++abi and libunwind.
It reaches into the sources to get the declaration of an ABI defined function.
This should allow the ARM buildbot to continue building libc++abi again.
llvm-svn: 235965
The externC variable was set but unused. This constantly flagged a warning from
gcc. Replace it with a comment until such a time that we need it.
llvm-svn: 235830
Cleans up the -Wundef warning caused by the use of the __LITTLE_ENDIAN__ macro.
Instead use `__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__`. `__BYTE_ORDER__` is
defined by GCC since 4.2 and by clang. This avoids the undef case where a macro
may be undefined. This has previously caught real errors in libunwind.
llvm-svn: 235828
Summary:
I accidentally implemented the 4.11 [conv.mem] conversions for libc++abi in a recent patch. @majnemer pointed out that 5.13 [except.handle] only allows the pointer conversions in 4.10 and not those is 4.11. This patch no longer allows the following example code:
```c++
struct A {};
struct B : public A {};
int main() {
try {
throw (int A::*)0;
} catch (int B::*) {
// exception caught here.
}
}
```
Reviewers: mclow.lists, jroelofs, majnemer
Reviewed By: majnemer
Subscribers: majnemer, cfe-commits
Differential Revision: http://reviews.llvm.org/D8845
llvm-svn: 234254
Summary:
Currently there are bugs in out detection of multi-level pointer conversions and pointer to member conversions. This patch fixes the following issues.
* Allow multi-level pointers with different nested qualifiers.
* Allow multi-level mixed pointers to objects and pointers to members with different nested qualifiers.
* Allow conversions from `int Base::*` to `int Derived::*` but only for non-nested pointers.
There is still some work that needs to be done to clean this patch up but I want to get some input on it.
Open questions:
* Does `__pointer_to_member_type_info::can_catch(...)` need to adjust the pointer if a base to derived conversion is performed?
Reviewers: danalbert, compnerd, mclow.lists
Reviewed By: mclow.lists
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D8758
llvm-svn: 233984
The unwinder now works on CloudABI. All exception-related libc++ tests
now pass.
This change was actually part of D8169, which also adds support for
FreeBSD. That, however, still requires some more polishing.
llvm-svn: 233676
There is some debugging code in cxa_demangle.cpp that prints messages on
stdout. In general this is not safe, as the program itself may use
stdout to write its output. Change this code to write to stderr.
Differential Revision: http://reviews.llvm.org/D8167
llvm-svn: 232716
Summary: This patch fixes a bug in `readEncodedPointer()` where it would read from memory that was not suitably aligned. This patch fixes it by using memcpy.
Reviewers: danalbert, echristo, compnerd, mclow.lists
Reviewed By: compnerd, mclow.lists
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D8179
llvm-svn: 231839
These are also part of the Unwind interfaces. However, their implementation is
different in EHABI vs frame tables based exception handling. Always provide a
definition. This partially undoes a movement change from earlier to make the
handling a bit simpler rather than grouping the two implementations together.
llvm-svn: 231690
These interfaces are not zero cost related, but rather generic unwind APIs used
by consumers of the Unwind library. Always provide the definition as they are
needed for both Zero Cost and Frame Table based implementations.
llvm-svn: 231666
Linux/GNU on AArch64 EH ABI Level III is implemented using exception frame
tables as defined in LSB II.11.6. The exception frame tables use the DWARF
Exception Header Encoding as described in LSB II.11.5.1. We already defined the
appropriate definition _LIBUNWIND_SUPPORT_DWARF_UNWIND to enable this.
llvm-svn: 231580
AArch64 uses // as the comment character (although, Darwin uses ;). However,
since we are using the C preprocessor on these files, // can be used as the
comment character across the board.
Tweak the platform guard to recognise __aarch64__ as well as __arm64__ for the
platform identifier.
llvm-svn: 231578
- GCC doesn't support #pragma mark, only Apple GCC and clang. Wrap the pragma mark's in #if 0 to make gcc ignore them but xcode still see them.
- Wrap a bunch of "#pragma clang" lines in #ifdef __clang__.
- Pacify gcc's -Wparenthesis in a case where it's quite reasonable.
llvm-svn: 231344
Summary:
This patch builds both static and shared versions of libc++abi by default. It adds/repurposes the following cmake options:
* `LIBCXXABI_ENABLE_SHARED`: Enable/disable building the shared library. (Previously using `OFF` would build the static library instead)
* `LIBCXXABI_ENABLE_STATIC`: Enable/disable building the static library.
This patch also re-purposes the CMake target `cxxabi` to be a meta-target for `cxxabi_shared` and `cxxabi_static`. This could potentially break other builds that depend on `cxxabi` being a library target. We will need to apply a patch to libc++'s CMake before committing this change.
Running the tests is still only supported when the shared version is built. Support for running the tests against the static library will come in another patch.
Reviewers: jroelofs, mclow.lists, danalbert, compnerd
Reviewed By: danalbert, compnerd
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D8013
llvm-svn: 231075
The support for the LSB eh_frame_hdr extension was overzealous in trying to
include headers. Be more careful to permit building on Darwin.
llvm-svn: 230837
This improves the performance of unwinding on DWARF based targets. The
32-bit x86 support for scanning the full eh_frame
(CFI_Parser::findFDE) apparently does not work (at least not on
Linux). Since the eh_frame_hdr code delegates to that, this still
doesn't work for x86 Linux, but it has been tested on x86_64 Linux and
aarch64 Android.
llvm-svn: 230802
TODO: The iwmmx register save & restore functions still need the same treatment.
I didn't do that in this patch because the integrated assembler has a bug
where it refuses to build them on -march=armv6-m, even with
.march armv5t
.arm
in front of those functions.
This should fix PR22384.
http://reviews.llvm.org/D7258
llvm-svn: 230360
Adding just -fno-exceptions breaks libunwind in quite mysterious way
when it's there, but exception handling doesn't work because of dummy
unwind tables.
Also as using exceptions implies references to symbols defined in
libcxx, abort build of libcxxabi as shared library if we have to keep
exceptions (when compiler supports -fno-exceptions, but not
-funwind-tables; one example would be a cross-compiler, in which case
testing for -funwind-tables flag by CMake actually requires libunwind to
be available before it's built).
llvm-svn: 229427
It seems that the remote unwinder is entirely unused at this moment.
unw_local_addr_space was referencing sThisAddressSpace which use to be a static
in global namespace. It has since then become a member variable of
LocalAddressSpace. Update this definition and always export it (needed to
implement unw_get_proc_info_by_ip for ARM).
llvm-svn: 229133
The statically allocated strings have a fixed size which can be computed using
the sizeof operator rather than duplicating the allocation size which can drift.
NFC.
llvm-svn: 229126
Instead of bzero(), we can simply use memset(). The strcpy() calls are
unneeded, as we can simply keep track of a pointer to the constant
strings we are copying.
Reviewed by: Jonathan Roelofs
llvm-svn: 229074
Convert the register saving code to use an explicit memcpy rather than the
implicit memcpy from the assignment. This avoids warnings from -Wcast-qual on
GCC and makes the code more explicit. Furthermore, use sizeof to calculate the
offsets rather than adding magic numbers, improving legibility of the code.
NFC.
llvm-svn: 228904
Ideally, we would do something like inline __declspec(dllexport) to ensure that
the symbol was inlined within libunwind as well as emitted into the final DSO.
This simply moves the definition out of the header to ensure that the *public*
interfaces are defined and exported into the final DSO.
This change also has "gratuitous" code movement so that the EHABI and generic
implementations are co-located making it easier to find them.
The movement from the header has one minor change introduced into the code:
additional tracing to mirror the behaviour of the non-EHABI interfaces.
llvm-svn: 228903
This is a slightly convoluted workaround. GCC does not support the
__has_feature extension of clang, and this results in some issues with
static_asserts. config.h defines static_assert as a macro with a C-specific
trickery. This then propagates into the C++ headers included after config.h,
which are used with C++11 mode, enabling constexpr constructors. The macro'ed
static_assert does not get treated as the static_assert builtin, and will cause
an error due to a non-empty constexpr constructor. Tweaking the include order
permits the use of libc++ headers to build libunwind with GCC on Linux.
llvm-svn: 228809
Mark that the functions always return or abort if the register class is
unhandled. Avoid placing the abort in the switch to permit -Wswitch-cover to
catch missing values.
llvm-svn: 228808
gcc still defaults to C89 which does not support BCPL style comments. This
splits up the sources list in CMakeLists and selectively adds compile flags for
using C99 which avoids a number of warnings in -Wpedantic mode. NFC.
llvm-svn: 228665
The unified register management interfaces had multiple naked macros for
conditional logic. This cleans them up to use the defined() form, avoiding
-Wundef warnings. NFC.
llvm-svn: 228663
Move the placement delete into the base class. This permits the proper emission
of the virtual destructor in UnwindCursor by using the class specific placement
delete instead of the normal single element ::operator delete. With this patch,
we can finally build libunwind as a DSO without a runtime dependency on
libc++/libc++abi.
llvm-svn: 228436
Convert all pure virtual functions in the UnwindCursor with implementations that
abort. This is effectively manually replicating the current behaviour, whilst
removing the compiler generated calls to __cxa_pure_virtual, which will abort at
runtime with a message indicating that a pure virtual call was made.
The whitespace changes are the result of executing clang-format over the changed
region.
llvm-svn: 228423
RTTI and exceptions are not needed for the unwinder, the use of C++ there is for
very specific cases, and does not require dynamic_cast nor does it use
exceptions. This avoids unnecessary references to type information being
emitted.
llvm-svn: 228408
Saleem Abdulrasool