X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=tools%2Flli%2Flli.cpp;h=22b48cf63f4c15a06cbcfc6b065aae3b37141963;hp=3ce28077aee2659ae9d68df438906dda58cf86f5;hb=647d6d7d3b6bfc8d99b8425cff50f979dbbd2ab6;hpb=a99be51bf5cdac1438069d4b01766c47704961c8 diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp index 3ce28077aee..22b48cf63f4 100644 --- a/tools/lli/lli.cpp +++ b/tools/lli/lli.cpp @@ -2,33 +2,66 @@ // // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This utility provides a simple wrapper around the LLVM Execution Engines, // which allow the direct execution of LLVM programs through a Just-In-Time -// compiler, or through an intepreter if no JIT is available for this platform. +// compiler, or through an interpreter if no JIT is available for this platform. // //===----------------------------------------------------------------------===// +#define DEBUG_TYPE "lli" +#include "RecordingMemoryManager.h" +#include "RemoteTarget.h" +#include "llvm/LLVMContext.h" #include "llvm/Module.h" -#include "llvm/ModuleProvider.h" #include "llvm/Type.h" +#include "llvm/ADT/Triple.h" #include "llvm/Bitcode/ReaderWriter.h" #include "llvm/CodeGen/LinkAllCodegenComponents.h" -#include "llvm/ExecutionEngine/JIT.h" -#include "llvm/ExecutionEngine/Interpreter.h" #include "llvm/ExecutionEngine/GenericValue.h" +#include "llvm/ExecutionEngine/Interpreter.h" +#include "llvm/ExecutionEngine/JIT.h" +#include "llvm/ExecutionEngine/JITEventListener.h" +#include "llvm/ExecutionEngine/JITMemoryManager.h" +#include "llvm/ExecutionEngine/MCJIT.h" #include "llvm/Support/CommandLine.h" +#include "llvm/Support/IRReader.h" #include "llvm/Support/ManagedStatic.h" #include "llvm/Support/MemoryBuffer.h" #include "llvm/Support/PluginLoader.h" -#include "llvm/System/Process.h" -#include "llvm/System/Signals.h" -#include +#include "llvm/Support/PrettyStackTrace.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/Support/Format.h" +#include "llvm/Support/Process.h" +#include "llvm/Support/Signals.h" +#include "llvm/Support/TargetSelect.h" +#include "llvm/Support/Debug.h" +#include "llvm/Support/DynamicLibrary.h" +#include "llvm/Support/Memory.h" +#include "llvm/Support/MathExtras.h" #include + +#ifdef __linux__ +// These includes used by LLIMCJITMemoryManager::getPointerToNamedFunction() +// for Glibc trickery. Look comments in this function for more information. +#ifdef HAVE_SYS_STAT_H +#include +#endif +#include +#include +#endif + +#ifdef __CYGWIN__ +#include +#if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007 +#define DO_NOTHING_ATEXIT 1 +#endif +#endif + using namespace llvm; namespace { @@ -41,66 +74,550 @@ namespace { cl::opt ForceInterpreter("force-interpreter", cl::desc("Force interpretation: disable JIT"), cl::init(false)); + + cl::opt UseMCJIT( + "use-mcjit", cl::desc("Enable use of the MC-based JIT (if available)"), + cl::init(false)); + + // The MCJIT supports building for a target address space separate from + // the JIT compilation process. Use a forked process and a copying + // memory manager with IPC to execute using this functionality. + cl::opt RemoteMCJIT("remote-mcjit", + cl::desc("Execute MCJIT'ed code in a separate process."), + cl::init(false)); + + // Determine optimization level. + cl::opt + OptLevel("O", + cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] " + "(default = '-O2')"), + cl::Prefix, + cl::ZeroOrMore, + cl::init(' ')); + cl::opt TargetTriple("mtriple", cl::desc("Override target triple for module")); - + + cl::opt + MArch("march", + cl::desc("Architecture to generate assembly for (see --version)")); + + cl::opt + MCPU("mcpu", + cl::desc("Target a specific cpu type (-mcpu=help for details)"), + cl::value_desc("cpu-name"), + cl::init("")); + + cl::list + MAttrs("mattr", + cl::CommaSeparated, + cl::desc("Target specific attributes (-mattr=help for details)"), + cl::value_desc("a1,+a2,-a3,...")); + + cl::opt + EntryFunc("entry-function", + cl::desc("Specify the entry function (default = 'main') " + "of the executable"), + cl::value_desc("function"), + cl::init("main")); + cl::opt FakeArgv0("fake-argv0", cl::desc("Override the 'argv[0]' value passed into the executing" " program"), cl::value_desc("executable")); - + cl::opt DisableCoreFiles("disable-core-files", cl::Hidden, cl::desc("Disable emission of core files if possible")); + + cl::opt + NoLazyCompilation("disable-lazy-compilation", + cl::desc("Disable JIT lazy compilation"), + cl::init(false)); + + cl::opt + RelocModel("relocation-model", + cl::desc("Choose relocation model"), + cl::init(Reloc::Default), + cl::values( + clEnumValN(Reloc::Default, "default", + "Target default relocation model"), + clEnumValN(Reloc::Static, "static", + "Non-relocatable code"), + clEnumValN(Reloc::PIC_, "pic", + "Fully relocatable, position independent code"), + clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", + "Relocatable external references, non-relocatable code"), + clEnumValEnd)); + + cl::opt + CMModel("code-model", + cl::desc("Choose code model"), + cl::init(CodeModel::JITDefault), + cl::values(clEnumValN(CodeModel::JITDefault, "default", + "Target default JIT code model"), + clEnumValN(CodeModel::Small, "small", + "Small code model"), + clEnumValN(CodeModel::Kernel, "kernel", + "Kernel code model"), + clEnumValN(CodeModel::Medium, "medium", + "Medium code model"), + clEnumValN(CodeModel::Large, "large", + "Large code model"), + clEnumValEnd)); + + cl::opt + EnableJITExceptionHandling("jit-enable-eh", + cl::desc("Emit exception handling information"), + cl::init(false)); + + cl::opt + GenerateSoftFloatCalls("soft-float", + cl::desc("Generate software floating point library calls"), + cl::init(false)); + + cl::opt + FloatABIForCalls("float-abi", + cl::desc("Choose float ABI type"), + cl::init(FloatABI::Default), + cl::values( + clEnumValN(FloatABI::Default, "default", + "Target default float ABI type"), + clEnumValN(FloatABI::Soft, "soft", + "Soft float ABI (implied by -soft-float)"), + clEnumValN(FloatABI::Hard, "hard", + "Hard float ABI (uses FP registers)"), + clEnumValEnd)); + cl::opt +// In debug builds, make this default to true. +#ifdef NDEBUG +#define EMIT_DEBUG false +#else +#define EMIT_DEBUG true +#endif + EmitJitDebugInfo("jit-emit-debug", + cl::desc("Emit debug information to debugger"), + cl::init(EMIT_DEBUG)); +#undef EMIT_DEBUG + + static cl::opt + EmitJitDebugInfoToDisk("jit-emit-debug-to-disk", + cl::Hidden, + cl::desc("Emit debug info objfiles to disk"), + cl::init(false)); } static ExecutionEngine *EE = 0; static void do_shutdown() { + // Cygwin-1.5 invokes DLL's dtors before atexit handler. +#ifndef DO_NOTHING_ATEXIT delete EE; llvm_shutdown(); +#endif +} + +// Memory manager for MCJIT +class LLIMCJITMemoryManager : public JITMemoryManager { +public: + SmallVector AllocatedDataMem; + SmallVector AllocatedCodeMem; + SmallVector FreeCodeMem; + + LLIMCJITMemoryManager() { } + ~LLIMCJITMemoryManager(); + + virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment, + unsigned SectionID); + + virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment, + unsigned SectionID); + + virtual void *getPointerToNamedFunction(const std::string &Name, + bool AbortOnFailure = true); + + // Invalidate instruction cache for code sections. Some platforms with + // separate data cache and instruction cache require explicit cache flush, + // otherwise JIT code manipulations (like resolved relocations) will get to + // the data cache but not to the instruction cache. + virtual void invalidateInstructionCache(); + + // The RTDyldMemoryManager doesn't use the following functions, so we don't + // need implement them. + virtual void setMemoryWritable() { + llvm_unreachable("Unexpected call!"); + } + virtual void setMemoryExecutable() { + llvm_unreachable("Unexpected call!"); + } + virtual void setPoisonMemory(bool poison) { + llvm_unreachable("Unexpected call!"); + } + virtual void AllocateGOT() { + llvm_unreachable("Unexpected call!"); + } + virtual uint8_t *getGOTBase() const { + llvm_unreachable("Unexpected call!"); + return 0; + } + virtual uint8_t *startFunctionBody(const Function *F, + uintptr_t &ActualSize){ + llvm_unreachable("Unexpected call!"); + return 0; + } + virtual uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize, + unsigned Alignment) { + llvm_unreachable("Unexpected call!"); + return 0; + } + virtual void endFunctionBody(const Function *F, uint8_t *FunctionStart, + uint8_t *FunctionEnd) { + llvm_unreachable("Unexpected call!"); + } + virtual uint8_t *allocateSpace(intptr_t Size, unsigned Alignment) { + llvm_unreachable("Unexpected call!"); + return 0; + } + virtual uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment) { + llvm_unreachable("Unexpected call!"); + return 0; + } + virtual void deallocateFunctionBody(void *Body) { + llvm_unreachable("Unexpected call!"); + } + virtual uint8_t* startExceptionTable(const Function* F, + uintptr_t &ActualSize) { + llvm_unreachable("Unexpected call!"); + return 0; + } + virtual void endExceptionTable(const Function *F, uint8_t *TableStart, + uint8_t *TableEnd, uint8_t* FrameRegister) { + llvm_unreachable("Unexpected call!"); + } + virtual void deallocateExceptionTable(void *ET) { + llvm_unreachable("Unexpected call!"); + } +}; + +uint8_t *LLIMCJITMemoryManager::allocateDataSection(uintptr_t Size, + unsigned Alignment, + unsigned SectionID) { + if (!Alignment) + Alignment = 16; + // Ensure that enough memory is requested to allow aligning. + size_t NumElementsAligned = 1 + (Size + Alignment - 1)/Alignment; + uint8_t *Addr = (uint8_t*)calloc(NumElementsAligned, Alignment); + + // Honour the alignment requirement. + uint8_t *AlignedAddr = (uint8_t*)RoundUpToAlignment((uint64_t)Addr, Alignment); + + // Store the original address from calloc so we can free it later. + AllocatedDataMem.push_back(sys::MemoryBlock(Addr, NumElementsAligned*Alignment)); + return AlignedAddr; +} + +uint8_t *LLIMCJITMemoryManager::allocateCodeSection(uintptr_t Size, + unsigned Alignment, + unsigned SectionID) { + if (!Alignment) + Alignment = 16; + unsigned NeedAllocate = Alignment * ((Size + Alignment - 1)/Alignment + 1); + uintptr_t Addr = 0; + // Look in the list of free code memory regions and use a block there if one + // is available. + for (int i = 0, e = FreeCodeMem.size(); i != e; ++i) { + sys::MemoryBlock &MB = FreeCodeMem[i]; + if (MB.size() >= NeedAllocate) { + Addr = (uintptr_t)MB.base(); + uintptr_t EndOfBlock = Addr + MB.size(); + // Align the address. + Addr = (Addr + Alignment - 1) & ~(uintptr_t)(Alignment - 1); + // Store cutted free memory block. + FreeCodeMem[i] = sys::MemoryBlock((void*)(Addr + Size), + EndOfBlock - Addr - Size); + return (uint8_t*)Addr; + } + } + + // No pre-allocated free block was large enough. Allocate a new memory region. + sys::MemoryBlock MB = sys::Memory::AllocateRWX(NeedAllocate, 0, 0); + + AllocatedCodeMem.push_back(MB); + Addr = (uintptr_t)MB.base(); + uintptr_t EndOfBlock = Addr + MB.size(); + // Align the address. + Addr = (Addr + Alignment - 1) & ~(uintptr_t)(Alignment - 1); + // The AllocateRWX may allocate much more memory than we need. In this case, + // we store the unused memory as a free memory block. + unsigned FreeSize = EndOfBlock-Addr-Size; + if (FreeSize > 16) + FreeCodeMem.push_back(sys::MemoryBlock((void*)(Addr + Size), FreeSize)); + + // Return aligned address + return (uint8_t*)Addr; +} + +void LLIMCJITMemoryManager::invalidateInstructionCache() { + for (int i = 0, e = AllocatedCodeMem.size(); i != e; ++i) + sys::Memory::InvalidateInstructionCache(AllocatedCodeMem[i].base(), + AllocatedCodeMem[i].size()); +} + +static int jit_noop() { + return 0; +} + +void *LLIMCJITMemoryManager::getPointerToNamedFunction(const std::string &Name, + bool AbortOnFailure) { +#if defined(__linux__) + //===--------------------------------------------------------------------===// + // Function stubs that are invoked instead of certain library calls + // + // Force the following functions to be linked in to anything that uses the + // JIT. This is a hack designed to work around the all-too-clever Glibc + // strategy of making these functions work differently when inlined vs. when + // not inlined, and hiding their real definitions in a separate archive file + // that the dynamic linker can't see. For more info, search for + // 'libc_nonshared.a' on Google, or read http://llvm.org/PR274. + if (Name == "stat") return (void*)(intptr_t)&stat; + if (Name == "fstat") return (void*)(intptr_t)&fstat; + if (Name == "lstat") return (void*)(intptr_t)&lstat; + if (Name == "stat64") return (void*)(intptr_t)&stat64; + if (Name == "fstat64") return (void*)(intptr_t)&fstat64; + if (Name == "lstat64") return (void*)(intptr_t)&lstat64; + if (Name == "atexit") return (void*)(intptr_t)&atexit; + if (Name == "mknod") return (void*)(intptr_t)&mknod; +#endif // __linux__ + + // We should not invoke parent's ctors/dtors from generated main()! + // On Mingw and Cygwin, the symbol __main is resolved to + // callee's(eg. tools/lli) one, to invoke wrong duplicated ctors + // (and register wrong callee's dtors with atexit(3)). + // We expect ExecutionEngine::runStaticConstructorsDestructors() + // is called before ExecutionEngine::runFunctionAsMain() is called. + if (Name == "__main") return (void*)(intptr_t)&jit_noop; + + const char *NameStr = Name.c_str(); + void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr); + if (Ptr) return Ptr; + + // If it wasn't found and if it starts with an underscore ('_') character, + // try again without the underscore. + if (NameStr[0] == '_') { + Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr+1); + if (Ptr) return Ptr; + } + + if (AbortOnFailure) + report_fatal_error("Program used external function '" + Name + + "' which could not be resolved!"); + return 0; +} + +LLIMCJITMemoryManager::~LLIMCJITMemoryManager() { + for (unsigned i = 0, e = AllocatedCodeMem.size(); i != e; ++i) + sys::Memory::ReleaseRWX(AllocatedCodeMem[i]); + for (unsigned i = 0, e = AllocatedDataMem.size(); i != e; ++i) + free(AllocatedDataMem[i].base()); +} + + +void layoutRemoteTargetMemory(RemoteTarget *T, RecordingMemoryManager *JMM) { + // Lay out our sections in order, with all the code sections first, then + // all the data sections. + uint64_t CurOffset = 0; + unsigned MaxAlign = T->getPageAlignment(); + SmallVector, 16> Offsets; + SmallVector Sizes; + for (RecordingMemoryManager::const_code_iterator I = JMM->code_begin(), + E = JMM->code_end(); + I != E; ++I) { + DEBUG(dbgs() << "code region: size " << I->first.size() + << ", alignment " << I->second << "\n"); + // Align the current offset up to whatever is needed for the next + // section. + unsigned Align = I->second; + CurOffset = (CurOffset + Align - 1) / Align * Align; + // Save off the address of the new section and allocate its space. + Offsets.push_back(std::pair(I->first.base(), CurOffset)); + Sizes.push_back(I->first.size()); + CurOffset += I->first.size(); + } + // Adjust to keep code and data aligned on seperate pages. + CurOffset = (CurOffset + MaxAlign - 1) / MaxAlign * MaxAlign; + unsigned FirstDataIndex = Offsets.size(); + for (RecordingMemoryManager::const_data_iterator I = JMM->data_begin(), + E = JMM->data_end(); + I != E; ++I) { + DEBUG(dbgs() << "data region: size " << I->first.size() + << ", alignment " << I->second << "\n"); + // Align the current offset up to whatever is needed for the next + // section. + unsigned Align = I->second; + CurOffset = (CurOffset + Align - 1) / Align * Align; + // Save off the address of the new section and allocate its space. + Offsets.push_back(std::pair(I->first.base(), CurOffset)); + Sizes.push_back(I->first.size()); + CurOffset += I->first.size(); + } + + // Allocate space in the remote target. + uint64_t RemoteAddr; + if (T->allocateSpace(CurOffset, MaxAlign, RemoteAddr)) + report_fatal_error(T->getErrorMsg()); + // Map the section addresses so relocations will get updated in the local + // copies of the sections. + for (unsigned i = 0, e = Offsets.size(); i != e; ++i) { + uint64_t Addr = RemoteAddr + Offsets[i].second; + EE->mapSectionAddress(const_cast(Offsets[i].first), Addr); + + DEBUG(dbgs() << " Mapping local: " << Offsets[i].first + << " to remote: " << format("%p", Addr) << "\n"); + + } + // Now load it all to the target. + for (unsigned i = 0, e = Offsets.size(); i != e; ++i) { + uint64_t Addr = RemoteAddr + Offsets[i].second; + + if (i < FirstDataIndex) { + T->loadCode(Addr, Offsets[i].first, Sizes[i]); + + DEBUG(dbgs() << " loading code: " << Offsets[i].first + << " to remote: " << format("%p", Addr) << "\n"); + } else { + T->loadData(Addr, Offsets[i].first, Sizes[i]); + + DEBUG(dbgs() << " loading data: " << Offsets[i].first + << " to remote: " << format("%p", Addr) << "\n"); + } + + } } //===----------------------------------------------------------------------===// // main Driver function // int main(int argc, char **argv, char * const *envp) { + sys::PrintStackTraceOnErrorSignal(); + PrettyStackTraceProgram X(argc, argv); + + LLVMContext &Context = getGlobalContext(); atexit(do_shutdown); // Call llvm_shutdown() on exit. + + // If we have a native target, initialize it to ensure it is linked in and + // usable by the JIT. + InitializeNativeTarget(); + InitializeNativeTargetAsmPrinter(); + cl::ParseCommandLineOptions(argc, argv, - " llvm interpreter & dynamic compiler\n"); - sys::PrintStackTraceOnErrorSignal(); + "llvm interpreter & dynamic compiler\n"); // If the user doesn't want core files, disable them. if (DisableCoreFiles) sys::Process::PreventCoreFiles(); - + // Load the bitcode... + SMDiagnostic Err; + Module *Mod = ParseIRFile(InputFile, Err, Context); + if (!Mod) { + Err.print(argv[0], errs()); + return 1; + } + + // If not jitting lazily, load the whole bitcode file eagerly too. std::string ErrorMsg; - ModuleProvider *MP = 0; - if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFile,&ErrorMsg)){ - MP = getBitcodeModuleProvider(Buffer, &ErrorMsg); - if (!MP) delete Buffer; - } - - if (!MP) { - std::cerr << argv[0] << ": error loading program '" << InputFile << "': " - << ErrorMsg << "\n"; - exit(1); + if (NoLazyCompilation) { + if (Mod->MaterializeAllPermanently(&ErrorMsg)) { + errs() << argv[0] << ": bitcode didn't read correctly.\n"; + errs() << "Reason: " << ErrorMsg << "\n"; + exit(1); + } } - // Get the module as the MP could go away once EE takes over. - Module *Mod = MP->getModule(); + EngineBuilder builder(Mod); + builder.setMArch(MArch); + builder.setMCPU(MCPU); + builder.setMAttrs(MAttrs); + builder.setRelocationModel(RelocModel); + builder.setCodeModel(CMModel); + builder.setErrorStr(&ErrorMsg); + builder.setEngineKind(ForceInterpreter + ? EngineKind::Interpreter + : EngineKind::JIT); // If we are supposed to override the target triple, do so now. if (!TargetTriple.empty()) - Mod->setTargetTriple(TargetTriple); - - EE = ExecutionEngine::create(MP, ForceInterpreter, &ErrorMsg); - if (!EE && !ErrorMsg.empty()) { - std::cerr << argv[0] << ":error creating EE: " << ErrorMsg << "\n"; + Mod->setTargetTriple(Triple::normalize(TargetTriple)); + + // Enable MCJIT if desired. + JITMemoryManager *JMM = 0; + if (UseMCJIT && !ForceInterpreter) { + builder.setUseMCJIT(true); + if (RemoteMCJIT) + JMM = new RecordingMemoryManager(); + else + JMM = new LLIMCJITMemoryManager(); + builder.setJITMemoryManager(JMM); + } else { + if (RemoteMCJIT) { + errs() << "error: Remote process execution requires -use-mcjit\n"; + exit(1); + } + builder.setJITMemoryManager(ForceInterpreter ? 0 : + JITMemoryManager::CreateDefaultMemManager()); + } + + CodeGenOpt::Level OLvl = CodeGenOpt::Default; + switch (OptLevel) { + default: + errs() << argv[0] << ": invalid optimization level.\n"; + return 1; + case ' ': break; + case '0': OLvl = CodeGenOpt::None; break; + case '1': OLvl = CodeGenOpt::Less; break; + case '2': OLvl = CodeGenOpt::Default; break; + case '3': OLvl = CodeGenOpt::Aggressive; break; + } + builder.setOptLevel(OLvl); + + TargetOptions Options; + Options.UseSoftFloat = GenerateSoftFloatCalls; + if (FloatABIForCalls != FloatABI::Default) + Options.FloatABIType = FloatABIForCalls; + if (GenerateSoftFloatCalls) + FloatABIForCalls = FloatABI::Soft; + + // Remote target execution doesn't handle EH or debug registration. + if (!RemoteMCJIT) { + Options.JITExceptionHandling = EnableJITExceptionHandling; + Options.JITEmitDebugInfo = EmitJitDebugInfo; + Options.JITEmitDebugInfoToDisk = EmitJitDebugInfoToDisk; + } + + builder.setTargetOptions(Options); + + EE = builder.create(); + if (!EE) { + if (!ErrorMsg.empty()) + errs() << argv[0] << ": error creating EE: " << ErrorMsg << "\n"; + else + errs() << argv[0] << ": unknown error creating EE!\n"; exit(1); } + // 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) { + errs() << "warning: 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()) { @@ -108,7 +625,7 @@ int main(int argc, char **argv, char * const *envp) { } else { // Otherwise, if there is a .bc suffix on the executable strip it off, it // might confuse the program. - if (InputFile.rfind(".bc") == InputFile.length() - 3) + if (StringRef(InputFile).endswith(".bc")) InputFile.erase(InputFile.length() - 3); } @@ -120,41 +637,100 @@ int main(int argc, char **argv, char * const *envp) { // using the contents of Args to determine argc & argv, and the contents of // EnvVars to determine envp. // - Function *Fn = Mod->getFunction("main"); - if (!Fn) { - std::cerr << "'main' function not found in module.\n"; + Function *EntryFn = Mod->getFunction(EntryFunc); + if (!EntryFn) { + errs() << '\'' << EntryFunc << "\' function not found in module.\n"; return -1; } - // 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::VoidTy, - Type::Int32Ty, NULL); - + // 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), + NULL); + // Reset errno to zero on entry to main. errno = 0; - + + // Remote target MCJIT doesn't (yet) support static constructors. No reason + // it couldn't. This is a limitation of the LLI implemantation, not the + // MCJIT itself. FIXME. + // // Run static constructors. - EE->runStaticConstructorsDestructors(false); - - // Run main. - int Result = EE->runFunctionAsMain(Fn, 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(Exit)) { - std::vector Args; - GenericValue ResultGV; - ResultGV.IntVal = APInt(32, Result); - Args.push_back(ResultGV); - EE->runFunction(ExitF, Args); - std::cerr << "ERROR: exit(" << Result << ") returned!\n"; - abort(); + if (!RemoteMCJIT) + EE->runStaticConstructorsDestructors(false); + + if (NoLazyCompilation) { + for (Module::iterator I = Mod->begin(), E = Mod->end(); I != E; ++I) { + Function *Fn = &*I; + if (Fn != EntryFn && !Fn->isDeclaration()) + EE->getPointerToFunction(Fn); + } + } + + int Result; + if (RemoteMCJIT) { + RecordingMemoryManager *MM = static_cast(JMM); + // Everything is prepared now, so lay out our program for the target + // address space, assign the section addresses to resolve any relocations, + // and send it to the target. + RemoteTarget Target; + Target.create(); + + // Ask for a pointer to the entry function. This triggers the actual + // compilation. + (void)EE->getPointerToFunction(EntryFn); + + // Enough has been compiled to execute the entry function now, so + // layout the target memory. + layoutRemoteTargetMemory(&Target, MM); + + // Since we're executing in a (at least simulated) remote address space, + // we can't use the ExecutionEngine::runFunctionAsMain(). We have to + // grab the function address directly here and tell the remote target + // to execute the function. + // FIXME: argv and envp handling. + uint64_t Entry = (uint64_t)EE->getPointerToFunction(EntryFn); + + DEBUG(dbgs() << "Executing '" << EntryFn->getName() << "' at " + << format("%p", Entry) << "\n"); + + if (Target.executeCode(Entry, Result)) + errs() << "ERROR: " << Target.getErrorMsg() << "\n"; + + Target.stop(); } else { - std::cerr << "ERROR: exit defined with wrong prototype!\n"; - abort(); + // 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 (JMM) + static_cast(JMM)->invalidateInstructionCache(); + + // Run main. + Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp); + } + + // Like static constructors, the remote target MCJIT support doesn't handle + // this yet. It could. FIXME. + if (!RemoteMCJIT) { + // 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(Exit)) { + std::vector Args; + GenericValue ResultGV; + ResultGV.IntVal = APInt(32, Result); + Args.push_back(ResultGV); + EE->runFunction(ExitF, Args); + errs() << "ERROR: exit(" << Result << ") returned!\n"; + abort(); + } else { + errs() << "ERROR: exit defined with wrong prototype!\n"; + abort(); + } } + return Result; }