forked from OSchip/llvm-project
714 lines
25 KiB
C++
714 lines
25 KiB
C++
//===- lli.cpp - LLVM Interpreter / Dynamic compiler ----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This utility provides a simple wrapper around the LLVM Execution Engines,
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// which allow the direct execution of LLVM programs through a Just-In-Time
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// compiler, or through an interpreter if no JIT is available for this platform.
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//
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//===----------------------------------------------------------------------===//
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#include "OrcLazyJIT.h"
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#include "RemoteJITUtils.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Bitcode/BitcodeReader.h"
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#include "llvm/CodeGen/CommandFlags.inc"
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#include "llvm/CodeGen/LinkAllCodegenComponents.h"
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#include "llvm/Config/llvm-config.h"
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#include "llvm/ExecutionEngine/GenericValue.h"
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#include "llvm/ExecutionEngine/Interpreter.h"
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#include "llvm/ExecutionEngine/JITEventListener.h"
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#include "llvm/ExecutionEngine/MCJIT.h"
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#include "llvm/ExecutionEngine/ObjectCache.h"
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#include "llvm/ExecutionEngine/Orc/OrcRemoteTargetClient.h"
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#include "llvm/ExecutionEngine/OrcMCJITReplacement.h"
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#include "llvm/ExecutionEngine/SectionMemoryManager.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Type.h"
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#include "llvm/IR/TypeBuilder.h"
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#include "llvm/IRReader/IRReader.h"
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#include "llvm/Object/Archive.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/DynamicLibrary.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/Memory.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/PluginLoader.h"
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#include "llvm/Support/Process.h"
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#include "llvm/Support/Program.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/WithColor.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Transforms/Instrumentation.h"
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#include <cerrno>
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#ifdef __CYGWIN__
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#include <cygwin/version.h>
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#if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007
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#define DO_NOTHING_ATEXIT 1
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#endif
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#endif
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using namespace llvm;
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#define DEBUG_TYPE "lli"
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namespace {
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enum class JITKind { MCJIT, OrcMCJITReplacement, OrcLazy };
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cl::opt<std::string>
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InputFile(cl::desc("<input bitcode>"), cl::Positional, cl::init("-"));
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cl::list<std::string>
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InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>..."));
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cl::opt<bool> ForceInterpreter("force-interpreter",
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cl::desc("Force interpretation: disable JIT"),
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cl::init(false));
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cl::opt<JITKind> UseJITKind("jit-kind",
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cl::desc("Choose underlying JIT kind."),
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cl::init(JITKind::MCJIT),
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cl::values(
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clEnumValN(JITKind::MCJIT, "mcjit",
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"MCJIT"),
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clEnumValN(JITKind::OrcMCJITReplacement,
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"orc-mcjit",
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"Orc-based MCJIT replacement"),
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clEnumValN(JITKind::OrcLazy,
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"orc-lazy",
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"Orc-based lazy JIT.")));
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// The MCJIT supports building for a target address space separate from
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// the JIT compilation process. Use a forked process and a copying
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// memory manager with IPC to execute using this functionality.
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cl::opt<bool> RemoteMCJIT("remote-mcjit",
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cl::desc("Execute MCJIT'ed code in a separate process."),
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cl::init(false));
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// Manually specify the child process for remote execution. This overrides
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// the simulated remote execution that allocates address space for child
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// execution. The child process will be executed and will communicate with
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// lli via stdin/stdout pipes.
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cl::opt<std::string>
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ChildExecPath("mcjit-remote-process",
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cl::desc("Specify the filename of the process to launch "
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"for remote MCJIT execution. If none is specified,"
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"\n\tremote execution will be simulated in-process."),
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cl::value_desc("filename"), cl::init(""));
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// Determine optimization level.
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cl::opt<char>
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OptLevel("O",
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cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
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"(default = '-O2')"),
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cl::Prefix,
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cl::ZeroOrMore,
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cl::init(' '));
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cl::opt<std::string>
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TargetTriple("mtriple", cl::desc("Override target triple for module"));
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cl::opt<std::string>
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EntryFunc("entry-function",
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cl::desc("Specify the entry function (default = 'main') "
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"of the executable"),
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cl::value_desc("function"),
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cl::init("main"));
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cl::list<std::string>
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ExtraModules("extra-module",
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cl::desc("Extra modules to be loaded"),
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cl::value_desc("input bitcode"));
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cl::list<std::string>
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ExtraObjects("extra-object",
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cl::desc("Extra object files to be loaded"),
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cl::value_desc("input object"));
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cl::list<std::string>
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ExtraArchives("extra-archive",
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cl::desc("Extra archive files to be loaded"),
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cl::value_desc("input archive"));
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cl::opt<bool>
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EnableCacheManager("enable-cache-manager",
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cl::desc("Use cache manager to save/load mdoules"),
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cl::init(false));
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cl::opt<std::string>
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ObjectCacheDir("object-cache-dir",
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cl::desc("Directory to store cached object files "
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"(must be user writable)"),
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cl::init(""));
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cl::opt<std::string>
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FakeArgv0("fake-argv0",
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cl::desc("Override the 'argv[0]' value passed into the executing"
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" program"), cl::value_desc("executable"));
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cl::opt<bool>
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DisableCoreFiles("disable-core-files", cl::Hidden,
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cl::desc("Disable emission of core files if possible"));
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cl::opt<bool>
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NoLazyCompilation("disable-lazy-compilation",
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cl::desc("Disable JIT lazy compilation"),
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cl::init(false));
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cl::opt<bool>
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GenerateSoftFloatCalls("soft-float",
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cl::desc("Generate software floating point library calls"),
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cl::init(false));
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ExitOnError ExitOnErr;
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}
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//===----------------------------------------------------------------------===//
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// Object cache
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//
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// This object cache implementation writes cached objects to disk to the
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// directory specified by CacheDir, using a filename provided in the module
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// descriptor. The cache tries to load a saved object using that path if the
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// file exists. CacheDir defaults to "", in which case objects are cached
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// alongside their originating bitcodes.
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//
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class LLIObjectCache : public ObjectCache {
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public:
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LLIObjectCache(const std::string& CacheDir) : CacheDir(CacheDir) {
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// Add trailing '/' to cache dir if necessary.
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if (!this->CacheDir.empty() &&
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this->CacheDir[this->CacheDir.size() - 1] != '/')
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this->CacheDir += '/';
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}
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~LLIObjectCache() override {}
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void notifyObjectCompiled(const Module *M, MemoryBufferRef Obj) override {
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const std::string &ModuleID = M->getModuleIdentifier();
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std::string CacheName;
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if (!getCacheFilename(ModuleID, CacheName))
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return;
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if (!CacheDir.empty()) { // Create user-defined cache dir.
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SmallString<128> dir(sys::path::parent_path(CacheName));
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sys::fs::create_directories(Twine(dir));
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}
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std::error_code EC;
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raw_fd_ostream outfile(CacheName, EC, sys::fs::F_None);
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outfile.write(Obj.getBufferStart(), Obj.getBufferSize());
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outfile.close();
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}
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std::unique_ptr<MemoryBuffer> getObject(const Module* M) override {
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const std::string &ModuleID = M->getModuleIdentifier();
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std::string CacheName;
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if (!getCacheFilename(ModuleID, CacheName))
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return nullptr;
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// Load the object from the cache filename
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ErrorOr<std::unique_ptr<MemoryBuffer>> IRObjectBuffer =
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MemoryBuffer::getFile(CacheName, -1, false);
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// If the file isn't there, that's OK.
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if (!IRObjectBuffer)
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return nullptr;
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// MCJIT will want to write into this buffer, and we don't want that
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// because the file has probably just been mmapped. Instead we make
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// a copy. The filed-based buffer will be released when it goes
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// out of scope.
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return MemoryBuffer::getMemBufferCopy(IRObjectBuffer.get()->getBuffer());
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}
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private:
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std::string CacheDir;
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bool getCacheFilename(const std::string &ModID, std::string &CacheName) {
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std::string Prefix("file:");
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size_t PrefixLength = Prefix.length();
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if (ModID.substr(0, PrefixLength) != Prefix)
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return false;
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std::string CacheSubdir = ModID.substr(PrefixLength);
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#if defined(_WIN32)
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// Transform "X:\foo" => "/X\foo" for convenience.
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if (isalpha(CacheSubdir[0]) && CacheSubdir[1] == ':') {
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CacheSubdir[1] = CacheSubdir[0];
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CacheSubdir[0] = '/';
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}
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#endif
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CacheName = CacheDir + CacheSubdir;
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size_t pos = CacheName.rfind('.');
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CacheName.replace(pos, CacheName.length() - pos, ".o");
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return true;
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}
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};
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// On Mingw and Cygwin, an external symbol named '__main' is called from the
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// generated 'main' function to allow static initialization. To avoid linking
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// problems with remote targets (because lli's remote target support does not
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// currently handle external linking) we add a secondary module which defines
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// an empty '__main' function.
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static void addCygMingExtraModule(ExecutionEngine &EE, LLVMContext &Context,
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StringRef TargetTripleStr) {
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IRBuilder<> Builder(Context);
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Triple TargetTriple(TargetTripleStr);
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// Create a new module.
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std::unique_ptr<Module> M = make_unique<Module>("CygMingHelper", Context);
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M->setTargetTriple(TargetTripleStr);
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// Create an empty function named "__main".
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Function *Result;
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if (TargetTriple.isArch64Bit()) {
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Result = Function::Create(
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TypeBuilder<int64_t(void), false>::get(Context),
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GlobalValue::ExternalLinkage, "__main", M.get());
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} else {
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Result = Function::Create(
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TypeBuilder<int32_t(void), false>::get(Context),
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GlobalValue::ExternalLinkage, "__main", M.get());
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}
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BasicBlock *BB = BasicBlock::Create(Context, "__main", Result);
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Builder.SetInsertPoint(BB);
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Value *ReturnVal;
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if (TargetTriple.isArch64Bit())
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ReturnVal = ConstantInt::get(Context, APInt(64, 0));
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else
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ReturnVal = ConstantInt::get(Context, APInt(32, 0));
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Builder.CreateRet(ReturnVal);
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// Add this new module to the ExecutionEngine.
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EE.addModule(std::move(M));
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}
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CodeGenOpt::Level getOptLevel() {
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switch (OptLevel) {
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default:
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WithColor::error(errs(), "lli") << "invalid optimization level.\n";
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exit(1);
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case '0': return CodeGenOpt::None;
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case '1': return CodeGenOpt::Less;
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case ' ':
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case '2': return CodeGenOpt::Default;
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case '3': return CodeGenOpt::Aggressive;
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}
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llvm_unreachable("Unrecognized opt level.");
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}
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LLVM_ATTRIBUTE_NORETURN
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static void reportError(SMDiagnostic Err, const char *ProgName) {
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Err.print(ProgName, errs());
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exit(1);
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}
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//===----------------------------------------------------------------------===//
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// main Driver function
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//
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int main(int argc, char **argv, char * const *envp) {
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InitLLVM X(argc, argv);
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if (argc > 1)
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ExitOnErr.setBanner(std::string(argv[0]) + ": ");
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// If we have a native target, initialize it to ensure it is linked in and
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// usable by the JIT.
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InitializeNativeTarget();
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InitializeNativeTargetAsmPrinter();
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InitializeNativeTargetAsmParser();
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cl::ParseCommandLineOptions(argc, argv,
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"llvm interpreter & dynamic compiler\n");
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// If the user doesn't want core files, disable them.
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if (DisableCoreFiles)
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sys::Process::PreventCoreFiles();
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LLVMContext Context;
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// Load the bitcode...
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SMDiagnostic Err;
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std::unique_ptr<Module> Owner = parseIRFile(InputFile, Err, Context);
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Module *Mod = Owner.get();
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if (!Mod)
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reportError(Err, argv[0]);
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if (UseJITKind == JITKind::OrcLazy) {
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std::vector<std::unique_ptr<Module>> Ms;
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Ms.push_back(std::move(Owner));
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for (auto &ExtraMod : ExtraModules) {
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Ms.push_back(parseIRFile(ExtraMod, Err, Context));
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if (!Ms.back())
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reportError(Err, argv[0]);
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}
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std::vector<std::string> Args;
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Args.push_back(InputFile);
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for (auto &Arg : InputArgv)
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Args.push_back(Arg);
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return runOrcLazyJIT(std::move(Ms), Args);
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}
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if (EnableCacheManager) {
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std::string CacheName("file:");
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CacheName.append(InputFile);
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Mod->setModuleIdentifier(CacheName);
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}
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// If not jitting lazily, load the whole bitcode file eagerly too.
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if (NoLazyCompilation) {
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// Use *argv instead of argv[0] to work around a wrong GCC warning.
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ExitOnError ExitOnErr(std::string(*argv) +
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": bitcode didn't read correctly: ");
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ExitOnErr(Mod->materializeAll());
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}
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std::string ErrorMsg;
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EngineBuilder builder(std::move(Owner));
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builder.setMArch(MArch);
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builder.setMCPU(getCPUStr());
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builder.setMAttrs(getFeatureList());
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if (RelocModel.getNumOccurrences())
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builder.setRelocationModel(RelocModel);
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if (CMModel.getNumOccurrences())
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builder.setCodeModel(CMModel);
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builder.setErrorStr(&ErrorMsg);
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builder.setEngineKind(ForceInterpreter
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? EngineKind::Interpreter
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: EngineKind::JIT);
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builder.setUseOrcMCJITReplacement(UseJITKind == JITKind::OrcMCJITReplacement);
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// If we are supposed to override the target triple, do so now.
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if (!TargetTriple.empty())
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Mod->setTargetTriple(Triple::normalize(TargetTriple));
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// Enable MCJIT if desired.
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RTDyldMemoryManager *RTDyldMM = nullptr;
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if (!ForceInterpreter) {
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if (RemoteMCJIT)
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RTDyldMM = new ForwardingMemoryManager();
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else
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RTDyldMM = new SectionMemoryManager();
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// Deliberately construct a temp std::unique_ptr to pass in. Do not null out
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// RTDyldMM: We still use it below, even though we don't own it.
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builder.setMCJITMemoryManager(
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std::unique_ptr<RTDyldMemoryManager>(RTDyldMM));
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} else if (RemoteMCJIT) {
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WithColor::error(errs(), argv[0])
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<< "remote process execution does not work with the interpreter.\n";
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exit(1);
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}
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builder.setOptLevel(getOptLevel());
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TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
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if (FloatABIForCalls != FloatABI::Default)
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Options.FloatABIType = FloatABIForCalls;
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builder.setTargetOptions(Options);
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std::unique_ptr<ExecutionEngine> EE(builder.create());
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if (!EE) {
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if (!ErrorMsg.empty())
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WithColor::error(errs(), argv[0])
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<< "error creating EE: " << ErrorMsg << "\n";
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else
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WithColor::error(errs(), argv[0]) << "unknown error creating EE!\n";
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exit(1);
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}
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std::unique_ptr<LLIObjectCache> CacheManager;
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if (EnableCacheManager) {
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CacheManager.reset(new LLIObjectCache(ObjectCacheDir));
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EE->setObjectCache(CacheManager.get());
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}
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// Load any additional modules specified on the command line.
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for (unsigned i = 0, e = ExtraModules.size(); i != e; ++i) {
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std::unique_ptr<Module> XMod = parseIRFile(ExtraModules[i], Err, Context);
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if (!XMod)
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reportError(Err, argv[0]);
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if (EnableCacheManager) {
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std::string CacheName("file:");
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CacheName.append(ExtraModules[i]);
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XMod->setModuleIdentifier(CacheName);
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}
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EE->addModule(std::move(XMod));
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}
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for (unsigned i = 0, e = ExtraObjects.size(); i != e; ++i) {
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Expected<object::OwningBinary<object::ObjectFile>> Obj =
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object::ObjectFile::createObjectFile(ExtraObjects[i]);
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if (!Obj) {
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// TODO: Actually report errors helpfully.
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consumeError(Obj.takeError());
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reportError(Err, argv[0]);
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}
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object::OwningBinary<object::ObjectFile> &O = Obj.get();
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EE->addObjectFile(std::move(O));
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}
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for (unsigned i = 0, e = ExtraArchives.size(); i != e; ++i) {
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ErrorOr<std::unique_ptr<MemoryBuffer>> ArBufOrErr =
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MemoryBuffer::getFileOrSTDIN(ExtraArchives[i]);
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if (!ArBufOrErr)
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reportError(Err, argv[0]);
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std::unique_ptr<MemoryBuffer> &ArBuf = ArBufOrErr.get();
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Expected<std::unique_ptr<object::Archive>> ArOrErr =
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object::Archive::create(ArBuf->getMemBufferRef());
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if (!ArOrErr) {
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std::string Buf;
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raw_string_ostream OS(Buf);
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logAllUnhandledErrors(ArOrErr.takeError(), OS, "");
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OS.flush();
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errs() << Buf;
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exit(1);
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}
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std::unique_ptr<object::Archive> &Ar = ArOrErr.get();
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object::OwningBinary<object::Archive> OB(std::move(Ar), std::move(ArBuf));
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EE->addArchive(std::move(OB));
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}
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// If the target is Cygwin/MingW and we are generating remote code, we
|
|
// need an extra module to help out with linking.
|
|
if (RemoteMCJIT && Triple(Mod->getTargetTriple()).isOSCygMing()) {
|
|
addCygMingExtraModule(*EE, Context, Mod->getTargetTriple());
|
|
}
|
|
|
|
// The following functions have no effect if their respective profiling
|
|
// support wasn't enabled in the build configuration.
|
|
EE->RegisterJITEventListener(
|
|
JITEventListener::createOProfileJITEventListener());
|
|
EE->RegisterJITEventListener(
|
|
JITEventListener::createIntelJITEventListener());
|
|
|
|
if (!NoLazyCompilation && RemoteMCJIT) {
|
|
WithColor::warning(errs(), argv[0])
|
|
<< "remote mcjit does not support lazy compilation\n";
|
|
NoLazyCompilation = true;
|
|
}
|
|
EE->DisableLazyCompilation(NoLazyCompilation);
|
|
|
|
// If the user specifically requested an argv[0] to pass into the program,
|
|
// do it now.
|
|
if (!FakeArgv0.empty()) {
|
|
InputFile = static_cast<std::string>(FakeArgv0);
|
|
} else {
|
|
// Otherwise, if there is a .bc suffix on the executable strip it off, it
|
|
// might confuse the program.
|
|
if (StringRef(InputFile).endswith(".bc"))
|
|
InputFile.erase(InputFile.length() - 3);
|
|
}
|
|
|
|
// Add the module's name to the start of the vector of arguments to main().
|
|
InputArgv.insert(InputArgv.begin(), InputFile);
|
|
|
|
// Call the main function from M as if its signature were:
|
|
// int main (int argc, char **argv, const char **envp)
|
|
// using the contents of Args to determine argc & argv, and the contents of
|
|
// EnvVars to determine envp.
|
|
//
|
|
Function *EntryFn = Mod->getFunction(EntryFunc);
|
|
if (!EntryFn) {
|
|
WithColor::error(errs(), argv[0])
|
|
<< '\'' << EntryFunc << "\' function not found in module.\n";
|
|
return -1;
|
|
}
|
|
|
|
// Reset errno to zero on entry to main.
|
|
errno = 0;
|
|
|
|
int Result = -1;
|
|
|
|
// Sanity check use of remote-jit: LLI currently only supports use of the
|
|
// remote JIT on Unix platforms.
|
|
if (RemoteMCJIT) {
|
|
#ifndef LLVM_ON_UNIX
|
|
WithColor::warning(errs(), argv[0])
|
|
<< "host does not support external remote targets.\n";
|
|
WithColor::note() << "defaulting to local execution\n";
|
|
return -1;
|
|
#else
|
|
if (ChildExecPath.empty()) {
|
|
WithColor::error(errs(), argv[0])
|
|
<< "-remote-mcjit requires -mcjit-remote-process.\n";
|
|
exit(1);
|
|
} else if (!sys::fs::can_execute(ChildExecPath)) {
|
|
WithColor::error(errs(), argv[0])
|
|
<< "unable to find usable child executable: '" << ChildExecPath
|
|
<< "'\n";
|
|
return -1;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (!RemoteMCJIT) {
|
|
// If the program doesn't explicitly call exit, we will need the Exit
|
|
// function later on to make an explicit call, so get the function now.
|
|
Constant *Exit = Mod->getOrInsertFunction("exit", Type::getVoidTy(Context),
|
|
Type::getInt32Ty(Context));
|
|
|
|
// Run static constructors.
|
|
if (!ForceInterpreter) {
|
|
// Give MCJIT a chance to apply relocations and set page permissions.
|
|
EE->finalizeObject();
|
|
}
|
|
EE->runStaticConstructorsDestructors(false);
|
|
|
|
// Trigger compilation separately so code regions that need to be
|
|
// invalidated will be known.
|
|
(void)EE->getPointerToFunction(EntryFn);
|
|
// Clear instruction cache before code will be executed.
|
|
if (RTDyldMM)
|
|
static_cast<SectionMemoryManager*>(RTDyldMM)->invalidateInstructionCache();
|
|
|
|
// Run main.
|
|
Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp);
|
|
|
|
// Run static destructors.
|
|
EE->runStaticConstructorsDestructors(true);
|
|
|
|
// If the program didn't call exit explicitly, we should call it now.
|
|
// This ensures that any atexit handlers get called correctly.
|
|
if (Function *ExitF = dyn_cast<Function>(Exit)) {
|
|
std::vector<GenericValue> Args;
|
|
GenericValue ResultGV;
|
|
ResultGV.IntVal = APInt(32, Result);
|
|
Args.push_back(ResultGV);
|
|
EE->runFunction(ExitF, Args);
|
|
WithColor::error(errs(), argv[0]) << "exit(" << Result << ") returned!\n";
|
|
abort();
|
|
} else {
|
|
WithColor::error(errs(), argv[0])
|
|
<< "exit defined with wrong prototype!\n";
|
|
abort();
|
|
}
|
|
} else {
|
|
// else == "if (RemoteMCJIT)"
|
|
|
|
// Remote target MCJIT doesn't (yet) support static constructors. No reason
|
|
// it couldn't. This is a limitation of the LLI implementation, not the
|
|
// MCJIT itself. FIXME.
|
|
|
|
// Lanch the remote process and get a channel to it.
|
|
std::unique_ptr<FDRawChannel> C = launchRemote();
|
|
if (!C) {
|
|
WithColor::error(errs(), argv[0]) << "failed to launch remote JIT.\n";
|
|
exit(1);
|
|
}
|
|
|
|
// Create a remote target client running over the channel.
|
|
llvm::orc::ExecutionSession ES;
|
|
ES.setErrorReporter([&](Error Err) { ExitOnErr(std::move(Err)); });
|
|
typedef orc::remote::OrcRemoteTargetClient MyRemote;
|
|
auto R = ExitOnErr(MyRemote::Create(*C, ES));
|
|
|
|
// Create a remote memory manager.
|
|
auto RemoteMM = ExitOnErr(R->createRemoteMemoryManager());
|
|
|
|
// Forward MCJIT's memory manager calls to the remote memory manager.
|
|
static_cast<ForwardingMemoryManager*>(RTDyldMM)->setMemMgr(
|
|
std::move(RemoteMM));
|
|
|
|
// Forward MCJIT's symbol resolution calls to the remote.
|
|
static_cast<ForwardingMemoryManager *>(RTDyldMM)->setResolver(
|
|
orc::createLambdaResolver(
|
|
[](const std::string &Name) { return nullptr; },
|
|
[&](const std::string &Name) {
|
|
if (auto Addr = ExitOnErr(R->getSymbolAddress(Name)))
|
|
return JITSymbol(Addr, JITSymbolFlags::Exported);
|
|
return JITSymbol(nullptr);
|
|
}));
|
|
|
|
// Grab the target address of the JIT'd main function on the remote and call
|
|
// it.
|
|
// FIXME: argv and envp handling.
|
|
JITTargetAddress Entry = EE->getFunctionAddress(EntryFn->getName().str());
|
|
EE->finalizeObject();
|
|
LLVM_DEBUG(dbgs() << "Executing '" << EntryFn->getName() << "' at 0x"
|
|
<< format("%llx", Entry) << "\n");
|
|
Result = ExitOnErr(R->callIntVoid(Entry));
|
|
|
|
// Like static constructors, the remote target MCJIT support doesn't handle
|
|
// this yet. It could. FIXME.
|
|
|
|
// Delete the EE - we need to tear it down *before* we terminate the session
|
|
// with the remote, otherwise it'll crash when it tries to release resources
|
|
// on a remote that has already been disconnected.
|
|
EE.reset();
|
|
|
|
// Signal the remote target that we're done JITing.
|
|
ExitOnErr(R->terminateSession());
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
std::unique_ptr<FDRawChannel> launchRemote() {
|
|
#ifndef LLVM_ON_UNIX
|
|
llvm_unreachable("launchRemote not supported on non-Unix platforms");
|
|
#else
|
|
int PipeFD[2][2];
|
|
pid_t ChildPID;
|
|
|
|
// Create two pipes.
|
|
if (pipe(PipeFD[0]) != 0 || pipe(PipeFD[1]) != 0)
|
|
perror("Error creating pipe: ");
|
|
|
|
ChildPID = fork();
|
|
|
|
if (ChildPID == 0) {
|
|
// In the child...
|
|
|
|
// Close the parent ends of the pipes
|
|
close(PipeFD[0][1]);
|
|
close(PipeFD[1][0]);
|
|
|
|
|
|
// Execute the child process.
|
|
std::unique_ptr<char[]> ChildPath, ChildIn, ChildOut;
|
|
{
|
|
ChildPath.reset(new char[ChildExecPath.size() + 1]);
|
|
std::copy(ChildExecPath.begin(), ChildExecPath.end(), &ChildPath[0]);
|
|
ChildPath[ChildExecPath.size()] = '\0';
|
|
std::string ChildInStr = utostr(PipeFD[0][0]);
|
|
ChildIn.reset(new char[ChildInStr.size() + 1]);
|
|
std::copy(ChildInStr.begin(), ChildInStr.end(), &ChildIn[0]);
|
|
ChildIn[ChildInStr.size()] = '\0';
|
|
std::string ChildOutStr = utostr(PipeFD[1][1]);
|
|
ChildOut.reset(new char[ChildOutStr.size() + 1]);
|
|
std::copy(ChildOutStr.begin(), ChildOutStr.end(), &ChildOut[0]);
|
|
ChildOut[ChildOutStr.size()] = '\0';
|
|
}
|
|
|
|
char * const args[] = { &ChildPath[0], &ChildIn[0], &ChildOut[0], nullptr };
|
|
int rc = execv(ChildExecPath.c_str(), args);
|
|
if (rc != 0)
|
|
perror("Error executing child process: ");
|
|
llvm_unreachable("Error executing child process");
|
|
}
|
|
// else we're the parent...
|
|
|
|
// Close the child ends of the pipes
|
|
close(PipeFD[0][0]);
|
|
close(PipeFD[1][1]);
|
|
|
|
// Return an RPC channel connected to our end of the pipes.
|
|
return llvm::make_unique<FDRawChannel>(PipeFD[1][0], PipeFD[0][1]);
|
|
#endif
|
|
}
|