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
Currently, the tests assume the system compiler is the one we want
to test, but if we build libcxxabi together with LLVM+Clang, it'll
get the wrong compiler.
This patch allows us to test if we have clang++ in our /bin directory,
and if so, use it.
llvm-svn: 243752
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
Summary:
backtrace_test.pass.cpp depends on unwind tables. These are generated by
-funwind-tables which is the default for x86 but not for other targets.
Thanks to Nitesh Jain for helping to narrow this down.
Fixes PR24148
Reviewers: jroelofs
Subscribers: cfe-commits, jroelofs, llvm-commits, hans
Differential Revision: http://reviews.llvm.org/D11529
llvm-svn: 243296
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
So cmake will throw error "include_directories given empty-string as include directory".
Use other variable name for the include path and do not find the default libunwind.h in the system path.
http://reviews.llvm.org/D9641
Patch by Jingyi Wei!
llvm-svn: 236936
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
Attempting to default the option to ON for ARM doesnt seem to work. Force the
check lower and perform the check at the two sites that matter: the CPPFLAGS
definition and the header search path setup.
llvm-svn: 235964
libc++abi uses EHABI extensions, which are only part of the LLVM unwinder. When
targeting ARM by default, enable the use of the LLVM unwinder. Hopefully this
will fix the ARM native bot
llvm-svn: 235904
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
This removes the libunwind build infrastructure as libunwind is gaining its own
CMakeLists.txt. The removal must occur first due to the multiple definitions of
the same target.
llvm-svn: 235794
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
Dan Gohman