From 2dd9848304c94b91399ad56189aa373fa9aebde6 Mon Sep 17 00:00:00 2001 From: Jonas Devlieghere Date: Tue, 31 Oct 2017 13:54:15 +0000 Subject: [PATCH] [dsymutil] Implement the --threads option This patch adds the --threads option to dsymutil to process architectures in parallel. The feature is already present in the version distributed with Xcode, but was not yet upstreamed. This is NFC as far as the linking behavior is concerned. As threads are used automatically, the current tests cover the change in implementation. Differential revision: https://reviews.llvm.org/D39355 llvm-svn: 316999 --- llvm/test/tools/dsymutil/cmdline.test | 21 +++++++++++++++++++ llvm/tools/dsymutil/DwarfLinker.cpp | 18 +++++++++++------ llvm/tools/dsymutil/dsymutil.cpp | 38 +++++++++++++++++++++++++++++++---- 3 files changed, 67 insertions(+), 10 deletions(-) create mode 100644 llvm/test/tools/dsymutil/cmdline.test diff --git a/llvm/test/tools/dsymutil/cmdline.test b/llvm/test/tools/dsymutil/cmdline.test new file mode 100644 index 0000000..983df4b --- /dev/null +++ b/llvm/test/tools/dsymutil/cmdline.test @@ -0,0 +1,21 @@ +RUN: llvm-dsymutil -help 2>&1 | FileCheck --check-prefix=HELP %s +HELP: OVERVIEW: manipulate archived DWARF debug symbol files. +HELP: USAGE: llvm-dsymutil [options] +HELP-NOT: -reverse-iterate +HELP: Specific Options: +HELP: -arch= +HELP: -dump-debug-map +HELP: -flat +HELP: -no-odr +HELP: -no-output +HELP: -no-swiftmodule-timestamp +HELP: -o= +HELP: -oso-prepend-path= +HELP: -symtab +HELP: -threads= +HELP: -verbose +HELP: -y +HELP-NOT: -reverse-iterate + +RUN: llvm-dsymutil --version 2>&1 | FileCheck --check-prefix=VERSION %s +VERSION: {{ version }} diff --git a/llvm/tools/dsymutil/DwarfLinker.cpp b/llvm/tools/dsymutil/DwarfLinker.cpp index b22b7a9..a726ba4 100644 --- a/llvm/tools/dsymutil/DwarfLinker.cpp +++ b/llvm/tools/dsymutil/DwarfLinker.cpp @@ -35,6 +35,7 @@ #include "llvm/Object/MachO.h" #include "llvm/Support/LEB128.h" #include "llvm/Support/TargetRegistry.h" +#include "llvm/Support/ToolOutputFile.h" #include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetOptions.h" #include @@ -479,7 +480,7 @@ class DwarfStreamer { /// @} /// The file we stream the linked Dwarf to. - std::unique_ptr OutFile; + std::unique_ptr OutFile; uint32_t RangesSectionSize; uint32_t LocSectionSize; @@ -617,13 +618,13 @@ bool DwarfStreamer::init(Triple TheTriple, StringRef OutputFilename) { // Create the output file. std::error_code EC; OutFile = - llvm::make_unique(OutputFilename, EC, sys::fs::F_None); + llvm::make_unique(OutputFilename, EC, sys::fs::F_None); if (EC) return error(Twine(OutputFilename) + ": " + EC.message(), Context); MCTargetOptions MCOptions = InitMCTargetOptionsFromFlags(); MS = TheTarget->createMCObjectStreamer( - TheTriple, *MC, std::unique_ptr(MAB), *OutFile, + TheTriple, *MC, std::unique_ptr(MAB), OutFile->os(), std::unique_ptr(MCE), *MSTI, MCOptions.MCRelaxAll, MCOptions.MCIncrementalLinkerCompatible, /*DWARFMustBeAtTheEnd*/ false); @@ -649,11 +650,16 @@ bool DwarfStreamer::init(Triple TheTriple, StringRef OutputFilename) { } bool DwarfStreamer::finish(const DebugMap &DM) { + bool Result = true; if (DM.getTriple().isOSDarwin() && !DM.getBinaryPath().empty()) - return MachOUtils::generateDsymCompanion(DM, *MS, *OutFile); + Result = MachOUtils::generateDsymCompanion(DM, *MS, OutFile->os()); + else + MS->Finish(); - MS->Finish(); - return true; + // Declare success. + OutFile->keep(); + + return Result; } /// Set the current output section to debug_info and change diff --git a/llvm/tools/dsymutil/dsymutil.cpp b/llvm/tools/dsymutil/dsymutil.cpp index 975f8a5..5f224b6 100644 --- a/llvm/tools/dsymutil/dsymutil.cpp +++ b/llvm/tools/dsymutil/dsymutil.cpp @@ -12,9 +12,9 @@ // //===----------------------------------------------------------------------===// +#include "dsymutil.h" #include "DebugMap.h" #include "MachOUtils.h" -#include "dsymutil.h" #include "llvm/Object/MachO.h" #include "llvm/Support/FileSystem.h" #include "llvm/Support/FileUtilities.h" @@ -22,8 +22,9 @@ #include "llvm/Support/Options.h" #include "llvm/Support/PrettyStackTrace.h" #include "llvm/Support/Signals.h" -#include "llvm/Support/raw_ostream.h" #include "llvm/Support/TargetSelect.h" +#include "llvm/Support/ThreadPool.h" +#include "llvm/Support/raw_ostream.h" #include #include @@ -61,6 +62,13 @@ static opt FlatOut("flat", init(false), cat(DsymCategory)); static alias FlatOutA("f", desc("Alias for --flat"), aliasopt(FlatOut)); +static opt Threads( + "threads", + desc("Specifies the maximum number (n) of simultaneous threads to use\n" + "when linking multiple architectures."), + value_desc("n"), init(0), cat(DsymCategory)); +static alias ThreadsA("t", desc("Alias for --threads"), aliasopt(Threads)); + static opt Verbose("verbose", desc("Verbosity level"), init(false), cat(DsymCategory)); @@ -316,6 +324,15 @@ int main(int argc, char **argv) { exitDsymutil(1); } + unsigned NumThreads = Threads; + if (!NumThreads) + NumThreads = llvm::thread::hardware_concurrency(); + if (DumpDebugMap || Verbose) + NumThreads = 1; + NumThreads = std::min(NumThreads, (unsigned)DebugMapPtrsOrErr->size()); + + llvm::ThreadPool Threads(NumThreads); + // If there is more than one link to execute, we need to generate // temporary files. bool NeedsTempFiles = !DumpDebugMap && (*DebugMapPtrsOrErr).size() != 1; @@ -333,14 +350,27 @@ int main(int argc, char **argv) { << ")\n"; std::string OutputFile = getOutputFileName(InputFile, NeedsTempFiles); - if (OutputFile.empty() || !linkDwarf(OutputFile, *Map, Options)) - exitDsymutil(1); + + auto LinkLambda = [OutputFile, Options, &Map]() { + if (OutputFile.empty() || !linkDwarf(OutputFile, *Map, Options)) + exitDsymutil(1); + }; + + // FIXME: The DwarfLinker can have some very deep recursion that can max + // out the (significantly smaller) stack when using threads. We don't + // want this limitation when we only have a single thread. + if (NumThreads == 1) + LinkLambda(); + else + Threads.async(LinkLambda); if (NeedsTempFiles) TempFiles.emplace_back(Map->getTriple().getArchName().str(), OutputFile); } + Threads.wait(); + if (NeedsTempFiles && !MachOUtils::generateUniversalBinary( TempFiles, getOutputFileName(InputFile), Options, SDKPath)) -- 2.7.4