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llvm-mirror/lib/Support
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Fangrui Song 2e7ead2539 Parallel: only allow the first TaskGroup to run tasks parallelly 
Summary:
Concurrent (e.g. nested) llvm::parallel::for_each() may lead to dead
locks. See PR35788 (fixed by rLLD322041) and PR41508 (fixed by D60757).

When parallel_for_each() is about to return, in ~Latch() called by
~TaskGroup(), a thread (in the default executor) may block in
Latch::sync() waiting for Count to become zero. If all threads in the
default executor are blocked, it is a dead lock.

To fix this, force serial execution if the current TaskGroup is not the
first one. For a nested llvm::parallel::for_each(), this parallelizes
the outermost loop and serializes inner loops.

Differential Revision: https://reviews.llvm.org/D61115

llvm-svn: 359182
2019-04-25 11:33:30 +00:00
..
Unix
posix_spawn should retry upon EINTR
2019-04-24 23:24:53 +00:00
Windows
[llvm][Support] Provide interface to set thread priorities
2019-04-16 14:32:43 +00:00
AArch64TargetParser.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
Allocator.cpp
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2019-01-19 08:50:56 +00:00
AMDGPUMetadata.cpp
[AMDGPU] Factored PAL metadata handling out into its own class
2019-03-20 17:42:00 +00:00
APFloat.cpp
[MC] Fix floating-point literal lexing.
2019-03-28 21:12:28 +00:00
APInt.cpp
[APInt] Optimize umul_ov
2019-04-19 02:06:06 +00:00
APSInt.cpp
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2019-01-19 08:50:56 +00:00
ARMAttributeParser.cpp
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2019-01-19 08:50:56 +00:00
ARMBuildAttrs.cpp
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2019-01-19 08:50:56 +00:00
ARMTargetParser.cpp
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2019-01-19 08:50:56 +00:00
ARMWinEH.cpp
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2019-01-19 08:50:56 +00:00
Atomic.cpp
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2019-01-19 08:50:56 +00:00
BinaryStreamError.cpp
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2019-01-19 08:50:56 +00:00
BinaryStreamReader.cpp
[Support] Add LEB128 support to BinaryStreamReader/Writer.
2019-04-17 15:38:27 +00:00
BinaryStreamRef.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
BinaryStreamWriter.cpp
[Support] Add LEB128 support to BinaryStreamReader/Writer.
2019-04-17 15:38:27 +00:00
BlockFrequency.cpp
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2019-01-19 08:50:56 +00:00
BranchProbability.cpp
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2019-01-19 08:50:56 +00:00
BuryPointer.cpp
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2019-01-19 08:50:56 +00:00
CachePruning.cpp
[CachePruning] Simplify comparator
2019-04-21 06:17:40 +00:00
Chrono.cpp
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2019-01-19 08:50:56 +00:00
circular_raw_ostream.cpp
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2019-01-19 08:50:56 +00:00
CMakeLists.txt
Attempt to recommit r357901
2019-04-08 12:31:12 +00:00
CodeGenCoverage.cpp
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2019-01-19 08:50:56 +00:00
COM.cpp
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2019-01-19 08:50:56 +00:00
CommandLine.cpp
Try once more to ensure constant initializaton of ManagedStatics
2019-04-24 20:13:23 +00:00
Compression.cpp
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2019-01-19 08:50:56 +00:00
ConvertUTF.cpp
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2019-01-19 08:50:56 +00:00
ConvertUTFWrapper.cpp
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2019-01-19 08:50:56 +00:00
COPYRIGHT.regex
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CrashRecoveryContext.cpp
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2019-01-19 08:50:56 +00:00
CRC.cpp
Attempt to recommit r357901
2019-04-08 12:31:12 +00:00
DAGDeltaAlgorithm.cpp
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2019-01-19 08:50:56 +00:00
DataExtractor.cpp
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2019-01-19 08:50:56 +00:00
Debug.cpp
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2019-01-19 08:50:56 +00:00
DebugCounter.cpp
Print out DebugCounter info with -print-debug-counter
2018-10-23 21:51:56 +00:00
DeltaAlgorithm.cpp
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2019-01-19 08:50:56 +00:00
DJB.cpp
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2019-01-19 08:50:56 +00:00
DynamicLibrary.cpp
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2019-01-19 08:50:56 +00:00
Errno.cpp
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2019-01-19 08:50:56 +00:00
Error.cpp
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2019-01-19 08:50:56 +00:00
ErrorHandling.cpp
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2019-01-19 08:50:56 +00:00
FileCheck.cpp
FileCheck [1/12]: Move variable table in new object
2019-04-15 10:10:11 +00:00
FileOutputBuffer.cpp
FileOutputBuffer: handle mmap(2) failure
2019-01-22 21:49:56 +00:00
FileUtilities.cpp
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2019-01-19 08:50:56 +00:00
FoldingSet.cpp
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2019-01-19 08:50:56 +00:00
FormattedStream.cpp
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2019-01-19 08:50:56 +00:00
FormatVariadic.cpp
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2019-01-19 08:50:56 +00:00
GlobPattern.cpp
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2019-01-19 08:50:56 +00:00
GraphWriter.cpp
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2019-01-19 08:50:56 +00:00
Hashing.cpp
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2019-01-19 08:50:56 +00:00
Host.cpp
[X86] Add CMPXCHG8B feature flag. Set it for all CPUs except i386/i486 including 'generic'. Disable use of CMPXCHG8B when this flag isn't set.
2019-03-20 23:35:49 +00:00
InitLLVM.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
IntEqClasses.cpp
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2019-01-19 08:50:56 +00:00
IntervalMap.cpp
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2019-01-19 08:50:56 +00:00
ItaniumManglingCanonicalizer.cpp
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2019-01-19 10:56:40 +00:00
JamCRC.cpp
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2019-01-19 08:50:56 +00:00
JSON.cpp
[JSON] Work around excess-precision issue when comparing T_Integer numbers.
2019-01-25 15:05:33 +00:00
KnownBits.cpp
[KnownBits] Add computeForAddCarry()
2019-04-12 18:18:08 +00:00
LEB128.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
LineIterator.cpp
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2019-01-19 08:50:56 +00:00
LLVMBuild.txt
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2019-01-19 08:50:56 +00:00
Locale.cpp
[Windows] Convert from UTF-8 to UTF-16 when writing to a Windows console
2018-09-05 00:08:56 +00:00
LockFileManager.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
LowLevelType.cpp
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2019-01-19 08:50:56 +00:00
ManagedStatic.cpp
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2019-01-19 08:50:56 +00:00
MathExtras.cpp
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2019-01-19 08:50:56 +00:00
MD5.cpp
Remove \brief commands from doxygen comments.
2018-05-01 15:54:18 +00:00
Memory.cpp
Initial implementation of JITLink - A replacement for RuntimeDyld.
2019-04-20 17:10:34 +00:00
MemoryBuffer.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
Mutex.cpp
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2019-01-19 08:50:56 +00:00
NativeFormatting.cpp
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2019-01-19 08:50:56 +00:00
Optional.cpp
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2019-01-19 08:50:56 +00:00
Options.cpp
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2019-01-19 08:50:56 +00:00
Parallel.cpp
Parallel: only allow the first TaskGroup to run tasks parallelly
2019-04-25 11:33:30 +00:00
Path.cpp
Revert using fcopyfile(3) to implement sys::fs::copy_file(Twine, int) on macOS
2019-04-24 19:08:43 +00:00
PluginLoader.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
PrettyStackTrace.cpp
Support: enable backtraces on Windows
2019-02-27 03:21:50 +00:00
Process.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
Program.cpp
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2019-01-19 08:50:56 +00:00
RandomNumberGenerator.cpp
[CommandLine] Provide parser<unsigned long> instantiation to allow cl::opt<uint64_t> on LP64 platforms
2019-04-24 02:40:20 +00:00
raw_os_ostream.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
raw_ostream.cpp
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2019-01-19 08:50:56 +00:00
regcomp.c
Attempt to heal bots after r328970.
2018-04-02 13:49:35 +00:00
regengine.inc
[ADT] Replace std::isprint by llvm::isPrint.
2018-07-26 15:31:41 +00:00
regerror.c
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regex2.h
Support/reg*.h: Make headers include their dependencies
2017-10-26 20:23:11 +00:00
regex_impl.h
Remove trailing space
2018-07-30 19:41:25 +00:00
Regex.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
regexec.c
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regfree.c
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regstrlcpy.c
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regutils.h
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RWMutex.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
ScaledNumber.cpp
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2019-01-19 08:50:56 +00:00
ScopedPrinter.cpp
Remove redundant includes from lib/Support.
2017-12-13 21:30:58 +00:00
SHA1.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
Signals.cpp
Only use argv[0] as the main executable name if it exists.
2019-04-15 22:07:56 +00:00
Signposts.cpp
Annotate timeline in Instruments with passes and other timed regions.
2019-02-19 18:18:31 +00:00
SmallPtrSet.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
SmallVector.cpp
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2019-01-19 08:50:56 +00:00
SourceMgr.cpp
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2019-01-19 08:50:56 +00:00
SpecialCaseList.cpp
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2019-01-19 08:50:56 +00:00
Statistic.cpp
Use llvm::stable_sort
2019-04-23 14:51:27 +00:00
StringExtras.cpp
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2019-01-19 08:50:56 +00:00
StringMap.cpp
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2019-01-19 08:50:56 +00:00
StringPool.cpp
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2019-01-19 08:50:56 +00:00
StringRef.cpp
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2019-01-19 08:50:56 +00:00
StringSaver.cpp
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2019-01-19 08:50:56 +00:00
SymbolRemappingReader.cpp
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2019-01-19 08:50:56 +00:00
SystemUtils.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
TargetParser.cpp
[AMDGPU] Add gfx1010 target definitions
2019-04-24 17:03:15 +00:00
TargetRegistry.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
TarWriter.cpp
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2019-01-19 08:50:56 +00:00
Threading.cpp
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2019-01-19 08:50:56 +00:00
ThreadLocal.cpp
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2019-01-19 08:50:56 +00:00
ThreadPool.cpp
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2019-01-19 08:50:56 +00:00
TimeProfiler.cpp
Time profiler: optimize json output time
2019-04-16 20:36:56 +00:00
Timer.cpp
[Legacy][TimePasses] allow -time-passes reporting into a custom stream
2019-03-22 23:11:08 +00:00
ToolOutputFile.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
TrigramIndex.cpp
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2019-01-19 08:50:56 +00:00
Triple.cpp
[WebAssembly] Add Emscripten OS definition + small_printf
2019-04-03 01:08:35 +00:00
Twine.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
Unicode.cpp
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2019-01-19 08:50:56 +00:00
UnicodeCaseFold.cpp
Resubmit r325107 (case folding DJB hash)
2018-02-21 22:36:31 +00:00
Valgrind.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
VersionTuple.cpp
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2019-01-19 08:50:56 +00:00
VirtualFileSystem.cpp
VFS: Avoid some unnecessary std::string copies
2019-02-23 23:48:47 +00:00
Watchdog.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
WithColor.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
xxhash.cpp
Make ICF log output order deterministic.
2018-07-31 18:04:58 +00:00
YAMLParser.cpp
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
YAMLTraits.cpp
[yaml2obj] - Don't crash on invalid inputs.
2019-04-25 09:59:55 +00:00
Z3Solver.cpp
New methods to check for under-/overflow in the SMT API
2019-03-27 16:54:12 +00:00