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15 Commits

Author SHA1 Message Date
Asiri Rathnayake 6d3ea6831d [libcxxabi] Refactor pthread usage into a separate API 
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
 2016-10-13 15:05:19 +00:00
Igor Kudrin d9edde4ae2 Recommit r282692: [libc++abi] Use fallback_malloc to allocate __cxa_eh_globals in case of dynamic memory exhaustion. 
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
 2016-10-07 08:48:28 +00:00
Igor Kudrin 49df799762 Revert r282692: Use fallback_malloc to allocate __cxa_eh_globals in case of dynamic memory exhaustion. 
The test breaks build bots.

llvm-svn: 282703
 2016-09-29 08:11:57 +00:00
Igor Kudrin 962750b511 [libc++abi] Use fallback_malloc to allocate __cxa_eh_globals in case of dynamic memory exhaustion. 
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
 2016-09-29 06:38:06 +00:00
Asiri Rathnayake 7c98baab29 [libcxxabi] cleanup the use of LIBCXXABI_HAS_NO_THREADS macro (NFC) 
Align the naming / use of the macro LIBCXXABI_HAS_NO_THREADS to follow what we
have in libcxx. NFC.

llvm-svn: 282062
 2016-09-21 09:09:32 +00:00
Jonathan Roelofs 3b7f085db1 s/LIBCXXABI_SINGLE_THREADED/LIBCXXABI_HAS_NO_THREADS/ for consistency with libcxx 
Also remove the audotedection part so that if you're crazy enough to want a
single-threaded abi library, you'll say so explicitly in the build.

llvm-svn: 217262
 2014-09-05 17:46:40 +00:00
Jonathan Roelofs 40e9842854 On single threaded systems, turn mutexes into nops 
http://reviews.llvm.org/D3386

llvm-svn: 208135
 2014-05-06 21:30:56 +00:00
Jonathan Roelofs c5f7e6fe67 [libcxxabi] Fix broken codesourcery.com links in comments 
review: http://llvm-reviews.chandlerc.com/D2718
llvm-svn: 201208
 2014-02-12 04:49:09 +00:00
Howard Hinnant be2eced483 Bruce Mitchener: Typo fixes. 
llvm-svn: 175275
 2013-02-15 15:48:49 +00:00
Howard Hinnant 47cb854818 Add a descriptive name for a constant. Also I'm at least temporarily waging war on throw specs, both old and new style. Except where we have already publicly exposed the throw spec, I'm getting rid of them. They may come back later. But they seem somewhat prone to cyclic dependencies here. The throw spec implies compiler generated code that this library has to jump to during stack unwinding. I'd like to minimize the possiblity that the code used to properly make that jump is itself creating such jumps. 
llvm-svn: 149251
 2012-01-30 16:07:00 +00:00
Howard Hinnant db97064263 Add comment documenting extension behavior of __cxa_get_globals_fast(). 
llvm-svn: 148966
 2012-01-25 19:19:13 +00:00
Howard Hinnant abc770690a By changing all of the throw() specs to noexcept I've been able to compile and link all of the source files into a dylib. Prior to this substitution the changed functions were calling __cxa_call_unexpected which isn't implemented yet. However in none of these cases do we actaully want __cxa_call_unexpected to be called. Primative buildit script added. 
llvm-svn: 148880
 2012-01-24 23:42:30 +00:00
Howard Hinnant fad744dd50 A lot of the code in cxa_exception.cpp depends on __cxa_get_globals_fast() returning null if __cxa_get_globals() hasn't been called yet. However it doesn't reliably do that, at least on OS X if __cxa_get_globals_fast() is called prior to pthread_key_create() running. Our choice is to either limit our use of __cxa_get_globals_fast() more than we have, or to have __cxa_get_globals_fast() initialize with pthread_key_create() if necessary. I chose the latter, and replaced pthread_once with a C++11 local static (which should do the same thing). 
llvm-svn: 148750
 2012-01-23 23:55:58 +00:00
Nick Kledzik 7cb4926da1 use abort_message() for pthread errors in __cxa_get_globals 
llvm-svn: 136672
 2011-08-02 01:34:26 +00:00
Marshall Clow 1df50ca6a2 Exception handling stuctures, and thread-local variables for exception handling 
llvm-svn: 135586
 2011-07-20 14:53:53 +00:00