MIPS build bots failed due to lack of 64bit atomic operations.
The fix is to disable VP for MIPS target until a better solution
is found.
llvm-svn: 253687
On Linux, we have internal_fork that forks without invoking user's pthread_atfork handlers, which is important for spawning external symbolizers. Let's implement this for OS X as well (using __fork). This patch also adds internal_forkpty which re-implements forkpty and uses __fork in it as well.
Differential Revision: http://reviews.llvm.org/D14869
llvm-svn: 253666
OS X doesn't support POSIX semaphores (but it does have the API for it, which returns ENOSYS - "Function not implemented").
Differential Revision: http://reviews.llvm.org/D14865
llvm-svn: 253665
On OS X, we don't have pthread spinlocks, let's just use a regular mutex instead. Secondly, pthread_rwlock_t is much larger (200 bytes), so `char padding_[64 - sizeof(pthread_rwlock_t)]` actually underflows.
Differential Revision: http://reviews.llvm.org/D14862
llvm-svn: 253659
Several tests rely on CLOCK_MONOTONIC, which doesn't exist on OS X. This patch fixes these tests by either disabling them (in case of cond_version.c which doesn't make sense on OS X), or by porting the test to also work on OS X.
Differential Revision: http://reviews.llvm.org/D14861
llvm-svn: 253658
Apparently check_c_compiler_flag isn't a thing everywhere. Not being
incredibly well-versed in cmake, I'm hoping that check_cxx_compiler_flag
serves a similar purpose. :)
llvm-svn: 253648
On OS X, this unit test (ThreadSpecificDtors) fails, because the new and delete operators actually call the overridden operators, which end up using TLVs and crash. Since C++'s new and delete is not important in this test, let's just replace them with a local variable. This fixes the test on OS X.
Differential Revision: http://reviews.llvm.org/D14826
llvm-svn: 253583
Summary:
Newer libstdc++ has global pool, which is filled with objects
allocated during libstdc++ initialization, and never released.
Using use_globals=0 in the lit tests results in these objects
being treated as leaks.
Fix this by porting several tests to plain C, and introducing
a simple sanity test case for __lsan::ScopedDisabler.
Reviewers: kcc, ygribov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D14798
llvm-svn: 253576
On OS X, the thread finalization is fragile due to thread-local variables destruction order. I've seen cases where the we destroy the ThreadState too early and subsequent thread-local values' destructors call interceptors again. Let's replace the TLV-based thread finalization method with libpthread hooks. The notification PTHREAD_INTROSPECTION_THREAD_TERMINATE is called *after* all TLVs have been destroyed.
Differential Revision: http://reviews.llvm.org/D14777
llvm-svn: 253560
On OS X, we build a dylib of the TSan runtime, which doesn't necessarily need to contain debugging symbols (and file and line information), so llvm-symbolizer might not be able to find file names for TSan internal frames. FrameIsInternal currently only considers filenames, but we should simply treat all frames within `libclang_rt.tsan_osx_dynamic.dylib` as internal. This patch treats all modules starting with `libclang_rt.tsan_` as internal, because there may be more runtimes for other platforms in the future.
Differential Revision: http://reviews.llvm.org/D14813
llvm-svn: 253559
Several testcases need pthread barriers (e.g. all bench_*.cc which use test/tsan/bench.h) which are not available on OS X. Let's mark them with "UNSUPPORTED: darwin".
Differential Revision: http://reviews.llvm.org/D14636
llvm-svn: 253558
Reimplement dispatch_once in an interceptor to solve these issues that may produce false positives with TSan on OS X:
1) there is a racy load inside an inlined part of dispatch_once,
2) the fast path in dispatch_once doesn't perform an acquire load, so we don't properly synchronize the initialization and subsequent uses of whatever is initialized,
3) dispatch_once is already used in a lot of already-compiled code, so TSan doesn't see the inlined fast-path.
This patch uses a trick to avoid ever taking the fast path (by never storing ~0 into the predicate), which means the interceptor will always be called even from already-compiled code. Within the interceptor, our own atomic reads and writes are not written into shadow cells, so the race in the inlined part is not reported (because the accesses are only loads).
Differential Revision: http://reviews.llvm.org/D14811
llvm-svn: 253552
Summary:
dlopen(NULL, ...) is intended to give you back a handle to the
executable for use with dlsym. Casting it to link_map and using it with
ForEachMappedRegion results in a crash.
We also shouldn't unpoison the globals of a DSO that is already in
memory. This ensures that we don't do it for the executable, but in
general, MSan may have false negatives if the DSO is already loaded.
Reviewers: eugenis
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D14795
llvm-svn: 253530
1. Added missing public API decl in InstrProfiling.h
2. Clang formatting fix
3. Added more comments for new VP code
4. refactor the VP allocation code to make it more readable.
llvm-svn: 253508
This change adds extends the data structures and adds in the routines
for handling runtime calls for value profiling. The profile data format
is modified and the version number is incremented.
llvm-svn: 253483
Symbolizers can call malloc/realloc/free/..., which we don't want to intercept. This is already implemented on Linux, let's do it for OS X as well.
Differential Revision: http://reviews.llvm.org/D14710
llvm-svn: 253460
This patch adds assembly routines to enable setjmp/longjmp for aarch64
on linux. It fixes:
* test/tsan/longjmp2.cc
* test/tsan/longjmp3.cc
* test/tsan/longjmp4.cc
* test/tsan/signal_longjmp.cc
I also checked with perlbench from specpu2006 (it fails to run
with missing setjmp/longjmp intrumentation).
llvm-svn: 253205
- This is to handle a corner case where profile lib is linked
in but non of the modules are instrumented (On linux, since
we avoided the overhead to emit runtime hook use functions so
this is the side effect of that size optimization).
- Added a profile runtime test case to cover all scenarios of
shared library builds.
Differential Revision: http://reviews.llvm.org/D14468
llvm-svn: 253098
I noticed that when a symbol is named just "x", it gets demangled to "long long". On POSIX, AFAIK, mangled names always start with "_Z", so lets just require that.
Differential Revision: http://reviews.llvm.org/D14637
llvm-svn: 253080
Currently, we crash on finalization of detached threads, because we'll try to clear the ThreadState twice.
Differential Revision: http://reviews.llvm.org/D14644
llvm-svn: 253079
On OS X, memcpy and memmove are actually aliases of the same function, so the memmove interceptor can be invoked on a call to memcpy. This patch updates the tests to expect either memmove or memcpy on a stack trace.
Differential Revision: http://reviews.llvm.org/D14638
llvm-svn: 253077
The OS X symbolizers (namely AtosSymbolizer) don't return full file paths, only file names. This patch modifies `mutexset*.cc` tests not to require a path to be present in the symbol on the stack trace.
Differential Revision: http://reviews.llvm.org/D14642
llvm-svn: 253075
Turns out that there are some checks in the backend that change code generation for armv7 if you are building against an iOS sys root. For the macho_embedded builtins we really don't want that.
llvm-svn: 253064
Xinliang David Li