You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
754 lines
26 KiB
754 lines
26 KiB
//===- lli.cpp - LLVM Interpreter / Dynamic compiler ----------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// 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 interpreter if no JIT is available for this platform.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "OrcLazyJIT.h"
|
|
#include "RemoteJITUtils.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/ADT/Triple.h"
|
|
#include "llvm/Bitcode/ReaderWriter.h"
|
|
#include "llvm/CodeGen/LinkAllCodegenComponents.h"
|
|
#include "llvm/ExecutionEngine/GenericValue.h"
|
|
#include "llvm/ExecutionEngine/Interpreter.h"
|
|
#include "llvm/ExecutionEngine/JITEventListener.h"
|
|
#include "llvm/ExecutionEngine/MCJIT.h"
|
|
#include "llvm/ExecutionEngine/ObjectCache.h"
|
|
#include "llvm/ExecutionEngine/OrcMCJITReplacement.h"
|
|
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
|
|
#include "llvm/ExecutionEngine/Orc/OrcRemoteTargetClient.h"
|
|
#include "llvm/IR/IRBuilder.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/IR/Type.h"
|
|
#include "llvm/IR/TypeBuilder.h"
|
|
#include "llvm/IRReader/IRReader.h"
|
|
#include "llvm/Object/Archive.h"
|
|
#include "llvm/Object/ObjectFile.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/DynamicLibrary.h"
|
|
#include "llvm/Support/Format.h"
|
|
#include "llvm/Support/ManagedStatic.h"
|
|
#include "llvm/Support/MathExtras.h"
|
|
#include "llvm/Support/Memory.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/Path.h"
|
|
#include "llvm/Support/PluginLoader.h"
|
|
#include "llvm/Support/PrettyStackTrace.h"
|
|
#include "llvm/Support/Process.h"
|
|
#include "llvm/Support/Program.h"
|
|
#include "llvm/Support/Signals.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "llvm/Support/TargetSelect.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include "llvm/Transforms/Instrumentation.h"
|
|
#include <cerrno>
|
|
|
|
#ifdef __CYGWIN__
|
|
#include <cygwin/version.h>
|
|
#if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007
|
|
#define DO_NOTHING_ATEXIT 1
|
|
#endif
|
|
#endif
|
|
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "lli"
|
|
|
|
namespace {
|
|
|
|
enum class JITKind { MCJIT, OrcMCJITReplacement, OrcLazy };
|
|
|
|
cl::opt<std::string>
|
|
InputFile(cl::desc("<input bitcode>"), cl::Positional, cl::init("-"));
|
|
|
|
cl::list<std::string>
|
|
InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>..."));
|
|
|
|
cl::opt<bool> ForceInterpreter("force-interpreter",
|
|
cl::desc("Force interpretation: disable JIT"),
|
|
cl::init(false));
|
|
|
|
cl::opt<JITKind> UseJITKind("jit-kind",
|
|
cl::desc("Choose underlying JIT kind."),
|
|
cl::init(JITKind::MCJIT),
|
|
cl::values(
|
|
clEnumValN(JITKind::MCJIT, "mcjit",
|
|
"MCJIT"),
|
|
clEnumValN(JITKind::OrcMCJITReplacement,
|
|
"orc-mcjit",
|
|
"Orc-based MCJIT replacement"),
|
|
clEnumValN(JITKind::OrcLazy,
|
|
"orc-lazy",
|
|
"Orc-based lazy JIT."),
|
|
clEnumValEnd));
|
|
|
|
// 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<bool> RemoteMCJIT("remote-mcjit",
|
|
cl::desc("Execute MCJIT'ed code in a separate process."),
|
|
cl::init(false));
|
|
|
|
// Manually specify the child process for remote execution. This overrides
|
|
// the simulated remote execution that allocates address space for child
|
|
// execution. The child process will be executed and will communicate with
|
|
// lli via stdin/stdout pipes.
|
|
cl::opt<std::string>
|
|
ChildExecPath("mcjit-remote-process",
|
|
cl::desc("Specify the filename of the process to launch "
|
|
"for remote MCJIT execution. If none is specified,"
|
|
"\n\tremote execution will be simulated in-process."),
|
|
cl::value_desc("filename"), cl::init(""));
|
|
|
|
// Determine optimization level.
|
|
cl::opt<char>
|
|
OptLevel("O",
|
|
cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
|
|
"(default = '-O2')"),
|
|
cl::Prefix,
|
|
cl::ZeroOrMore,
|
|
cl::init(' '));
|
|
|
|
cl::opt<std::string>
|
|
TargetTriple("mtriple", cl::desc("Override target triple for module"));
|
|
|
|
cl::opt<std::string>
|
|
MArch("march",
|
|
cl::desc("Architecture to generate assembly for (see --version)"));
|
|
|
|
cl::opt<std::string>
|
|
MCPU("mcpu",
|
|
cl::desc("Target a specific cpu type (-mcpu=help for details)"),
|
|
cl::value_desc("cpu-name"),
|
|
cl::init(""));
|
|
|
|
cl::list<std::string>
|
|
MAttrs("mattr",
|
|
cl::CommaSeparated,
|
|
cl::desc("Target specific attributes (-mattr=help for details)"),
|
|
cl::value_desc("a1,+a2,-a3,..."));
|
|
|
|
cl::opt<std::string>
|
|
EntryFunc("entry-function",
|
|
cl::desc("Specify the entry function (default = 'main') "
|
|
"of the executable"),
|
|
cl::value_desc("function"),
|
|
cl::init("main"));
|
|
|
|
cl::list<std::string>
|
|
ExtraModules("extra-module",
|
|
cl::desc("Extra modules to be loaded"),
|
|
cl::value_desc("input bitcode"));
|
|
|
|
cl::list<std::string>
|
|
ExtraObjects("extra-object",
|
|
cl::desc("Extra object files to be loaded"),
|
|
cl::value_desc("input object"));
|
|
|
|
cl::list<std::string>
|
|
ExtraArchives("extra-archive",
|
|
cl::desc("Extra archive files to be loaded"),
|
|
cl::value_desc("input archive"));
|
|
|
|
cl::opt<bool>
|
|
EnableCacheManager("enable-cache-manager",
|
|
cl::desc("Use cache manager to save/load mdoules"),
|
|
cl::init(false));
|
|
|
|
cl::opt<std::string>
|
|
ObjectCacheDir("object-cache-dir",
|
|
cl::desc("Directory to store cached object files "
|
|
"(must be user writable)"),
|
|
cl::init(""));
|
|
|
|
cl::opt<std::string>
|
|
FakeArgv0("fake-argv0",
|
|
cl::desc("Override the 'argv[0]' value passed into the executing"
|
|
" program"), cl::value_desc("executable"));
|
|
|
|
cl::opt<bool>
|
|
DisableCoreFiles("disable-core-files", cl::Hidden,
|
|
cl::desc("Disable emission of core files if possible"));
|
|
|
|
cl::opt<bool>
|
|
NoLazyCompilation("disable-lazy-compilation",
|
|
cl::desc("Disable JIT lazy compilation"),
|
|
cl::init(false));
|
|
|
|
cl::opt<Reloc::Model> RelocModel(
|
|
"relocation-model", cl::desc("Choose relocation model"),
|
|
cl::values(
|
|
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<llvm::CodeModel::Model>
|
|
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<bool>
|
|
GenerateSoftFloatCalls("soft-float",
|
|
cl::desc("Generate software floating point library calls"),
|
|
cl::init(false));
|
|
|
|
cl::opt<llvm::FloatABI::ABIType>
|
|
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));
|
|
|
|
ExitOnError ExitOnErr;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Object cache
|
|
//
|
|
// This object cache implementation writes cached objects to disk to the
|
|
// directory specified by CacheDir, using a filename provided in the module
|
|
// descriptor. The cache tries to load a saved object using that path if the
|
|
// file exists. CacheDir defaults to "", in which case objects are cached
|
|
// alongside their originating bitcodes.
|
|
//
|
|
class LLIObjectCache : public ObjectCache {
|
|
public:
|
|
LLIObjectCache(const std::string& CacheDir) : CacheDir(CacheDir) {
|
|
// Add trailing '/' to cache dir if necessary.
|
|
if (!this->CacheDir.empty() &&
|
|
this->CacheDir[this->CacheDir.size() - 1] != '/')
|
|
this->CacheDir += '/';
|
|
}
|
|
~LLIObjectCache() override {}
|
|
|
|
void notifyObjectCompiled(const Module *M, MemoryBufferRef Obj) override {
|
|
const std::string &ModuleID = M->getModuleIdentifier();
|
|
std::string CacheName;
|
|
if (!getCacheFilename(ModuleID, CacheName))
|
|
return;
|
|
if (!CacheDir.empty()) { // Create user-defined cache dir.
|
|
SmallString<128> dir(sys::path::parent_path(CacheName));
|
|
sys::fs::create_directories(Twine(dir));
|
|
}
|
|
std::error_code EC;
|
|
raw_fd_ostream outfile(CacheName, EC, sys::fs::F_None);
|
|
outfile.write(Obj.getBufferStart(), Obj.getBufferSize());
|
|
outfile.close();
|
|
}
|
|
|
|
std::unique_ptr<MemoryBuffer> getObject(const Module* M) override {
|
|
const std::string &ModuleID = M->getModuleIdentifier();
|
|
std::string CacheName;
|
|
if (!getCacheFilename(ModuleID, CacheName))
|
|
return nullptr;
|
|
// Load the object from the cache filename
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> IRObjectBuffer =
|
|
MemoryBuffer::getFile(CacheName.c_str(), -1, false);
|
|
// If the file isn't there, that's OK.
|
|
if (!IRObjectBuffer)
|
|
return nullptr;
|
|
// MCJIT will want to write into this buffer, and we don't want that
|
|
// because the file has probably just been mmapped. Instead we make
|
|
// a copy. The filed-based buffer will be released when it goes
|
|
// out of scope.
|
|
return MemoryBuffer::getMemBufferCopy(IRObjectBuffer.get()->getBuffer());
|
|
}
|
|
|
|
private:
|
|
std::string CacheDir;
|
|
|
|
bool getCacheFilename(const std::string &ModID, std::string &CacheName) {
|
|
std::string Prefix("file:");
|
|
size_t PrefixLength = Prefix.length();
|
|
if (ModID.substr(0, PrefixLength) != Prefix)
|
|
return false;
|
|
std::string CacheSubdir = ModID.substr(PrefixLength);
|
|
#if defined(_WIN32)
|
|
// Transform "X:\foo" => "/X\foo" for convenience.
|
|
if (isalpha(CacheSubdir[0]) && CacheSubdir[1] == ':') {
|
|
CacheSubdir[1] = CacheSubdir[0];
|
|
CacheSubdir[0] = '/';
|
|
}
|
|
#endif
|
|
CacheName = CacheDir + CacheSubdir;
|
|
size_t pos = CacheName.rfind('.');
|
|
CacheName.replace(pos, CacheName.length() - pos, ".o");
|
|
return true;
|
|
}
|
|
};
|
|
|
|
// On Mingw and Cygwin, an external symbol named '__main' is called from the
|
|
// generated 'main' function to allow static intialization. To avoid linking
|
|
// problems with remote targets (because lli's remote target support does not
|
|
// currently handle external linking) we add a secondary module which defines
|
|
// an empty '__main' function.
|
|
static void addCygMingExtraModule(ExecutionEngine &EE, LLVMContext &Context,
|
|
StringRef TargetTripleStr) {
|
|
IRBuilder<> Builder(Context);
|
|
Triple TargetTriple(TargetTripleStr);
|
|
|
|
// Create a new module.
|
|
std::unique_ptr<Module> M = make_unique<Module>("CygMingHelper", Context);
|
|
M->setTargetTriple(TargetTripleStr);
|
|
|
|
// Create an empty function named "__main".
|
|
Function *Result;
|
|
if (TargetTriple.isArch64Bit()) {
|
|
Result = Function::Create(
|
|
TypeBuilder<int64_t(void), false>::get(Context),
|
|
GlobalValue::ExternalLinkage, "__main", M.get());
|
|
} else {
|
|
Result = Function::Create(
|
|
TypeBuilder<int32_t(void), false>::get(Context),
|
|
GlobalValue::ExternalLinkage, "__main", M.get());
|
|
}
|
|
BasicBlock *BB = BasicBlock::Create(Context, "__main", Result);
|
|
Builder.SetInsertPoint(BB);
|
|
Value *ReturnVal;
|
|
if (TargetTriple.isArch64Bit())
|
|
ReturnVal = ConstantInt::get(Context, APInt(64, 0));
|
|
else
|
|
ReturnVal = ConstantInt::get(Context, APInt(32, 0));
|
|
Builder.CreateRet(ReturnVal);
|
|
|
|
// Add this new module to the ExecutionEngine.
|
|
EE.addModule(std::move(M));
|
|
}
|
|
|
|
CodeGenOpt::Level getOptLevel() {
|
|
switch (OptLevel) {
|
|
default:
|
|
errs() << "lli: Invalid optimization level.\n";
|
|
exit(1);
|
|
case '0': return CodeGenOpt::None;
|
|
case '1': return CodeGenOpt::Less;
|
|
case ' ':
|
|
case '2': return CodeGenOpt::Default;
|
|
case '3': return CodeGenOpt::Aggressive;
|
|
}
|
|
llvm_unreachable("Unrecognized opt level.");
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// main Driver function
|
|
//
|
|
int main(int argc, char **argv, char * const *envp) {
|
|
sys::PrintStackTraceOnErrorSignal(argv[0]);
|
|
PrettyStackTraceProgram X(argc, argv);
|
|
|
|
atexit(llvm_shutdown); // Call llvm_shutdown() on exit.
|
|
|
|
if (argc > 1)
|
|
ExitOnErr.setBanner(std::string(argv[0]) + ": ");
|
|
|
|
// If we have a native target, initialize it to ensure it is linked in and
|
|
// usable by the JIT.
|
|
InitializeNativeTarget();
|
|
InitializeNativeTargetAsmPrinter();
|
|
InitializeNativeTargetAsmParser();
|
|
|
|
cl::ParseCommandLineOptions(argc, argv,
|
|
"llvm interpreter & dynamic compiler\n");
|
|
|
|
// If the user doesn't want core files, disable them.
|
|
if (DisableCoreFiles)
|
|
sys::Process::PreventCoreFiles();
|
|
|
|
LLVMContext Context;
|
|
|
|
// Load the bitcode...
|
|
SMDiagnostic Err;
|
|
std::unique_ptr<Module> Owner = parseIRFile(InputFile, Err, Context);
|
|
Module *Mod = Owner.get();
|
|
if (!Mod) {
|
|
Err.print(argv[0], errs());
|
|
return 1;
|
|
}
|
|
|
|
if (UseJITKind == JITKind::OrcLazy)
|
|
return runOrcLazyJIT(std::move(Owner), argc, argv);
|
|
|
|
if (EnableCacheManager) {
|
|
std::string CacheName("file:");
|
|
CacheName.append(InputFile);
|
|
Mod->setModuleIdentifier(CacheName);
|
|
}
|
|
|
|
// If not jitting lazily, load the whole bitcode file eagerly too.
|
|
if (NoLazyCompilation) {
|
|
if (std::error_code EC = Mod->materializeAll()) {
|
|
errs() << argv[0] << ": bitcode didn't read correctly.\n";
|
|
errs() << "Reason: " << EC.message() << "\n";
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
std::string ErrorMsg;
|
|
EngineBuilder builder(std::move(Owner));
|
|
builder.setMArch(MArch);
|
|
builder.setMCPU(MCPU);
|
|
builder.setMAttrs(MAttrs);
|
|
if (RelocModel.getNumOccurrences())
|
|
builder.setRelocationModel(RelocModel);
|
|
builder.setCodeModel(CMModel);
|
|
builder.setErrorStr(&ErrorMsg);
|
|
builder.setEngineKind(ForceInterpreter
|
|
? EngineKind::Interpreter
|
|
: EngineKind::JIT);
|
|
builder.setUseOrcMCJITReplacement(UseJITKind == JITKind::OrcMCJITReplacement);
|
|
|
|
// If we are supposed to override the target triple, do so now.
|
|
if (!TargetTriple.empty())
|
|
Mod->setTargetTriple(Triple::normalize(TargetTriple));
|
|
|
|
// Enable MCJIT if desired.
|
|
RTDyldMemoryManager *RTDyldMM = nullptr;
|
|
if (!ForceInterpreter) {
|
|
if (RemoteMCJIT)
|
|
RTDyldMM = new ForwardingMemoryManager();
|
|
else
|
|
RTDyldMM = new SectionMemoryManager();
|
|
|
|
// Deliberately construct a temp std::unique_ptr to pass in. Do not null out
|
|
// RTDyldMM: We still use it below, even though we don't own it.
|
|
builder.setMCJITMemoryManager(
|
|
std::unique_ptr<RTDyldMemoryManager>(RTDyldMM));
|
|
} else if (RemoteMCJIT) {
|
|
errs() << "error: Remote process execution does not work with the "
|
|
"interpreter.\n";
|
|
exit(1);
|
|
}
|
|
|
|
builder.setOptLevel(getOptLevel());
|
|
|
|
TargetOptions Options;
|
|
if (FloatABIForCalls != FloatABI::Default)
|
|
Options.FloatABIType = FloatABIForCalls;
|
|
|
|
builder.setTargetOptions(Options);
|
|
|
|
std::unique_ptr<ExecutionEngine> 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);
|
|
}
|
|
|
|
std::unique_ptr<LLIObjectCache> CacheManager;
|
|
if (EnableCacheManager) {
|
|
CacheManager.reset(new LLIObjectCache(ObjectCacheDir));
|
|
EE->setObjectCache(CacheManager.get());
|
|
}
|
|
|
|
// Load any additional modules specified on the command line.
|
|
for (unsigned i = 0, e = ExtraModules.size(); i != e; ++i) {
|
|
std::unique_ptr<Module> XMod = parseIRFile(ExtraModules[i], Err, Context);
|
|
if (!XMod) {
|
|
Err.print(argv[0], errs());
|
|
return 1;
|
|
}
|
|
if (EnableCacheManager) {
|
|
std::string CacheName("file:");
|
|
CacheName.append(ExtraModules[i]);
|
|
XMod->setModuleIdentifier(CacheName);
|
|
}
|
|
EE->addModule(std::move(XMod));
|
|
}
|
|
|
|
for (unsigned i = 0, e = ExtraObjects.size(); i != e; ++i) {
|
|
Expected<object::OwningBinary<object::ObjectFile>> Obj =
|
|
object::ObjectFile::createObjectFile(ExtraObjects[i]);
|
|
if (!Obj) {
|
|
// TODO: Actually report errors helpfully.
|
|
consumeError(Obj.takeError());
|
|
Err.print(argv[0], errs());
|
|
return 1;
|
|
}
|
|
object::OwningBinary<object::ObjectFile> &O = Obj.get();
|
|
EE->addObjectFile(std::move(O));
|
|
}
|
|
|
|
for (unsigned i = 0, e = ExtraArchives.size(); i != e; ++i) {
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> ArBufOrErr =
|
|
MemoryBuffer::getFileOrSTDIN(ExtraArchives[i]);
|
|
if (!ArBufOrErr) {
|
|
Err.print(argv[0], errs());
|
|
return 1;
|
|
}
|
|
std::unique_ptr<MemoryBuffer> &ArBuf = ArBufOrErr.get();
|
|
|
|
Expected<std::unique_ptr<object::Archive>> ArOrErr =
|
|
object::Archive::create(ArBuf->getMemBufferRef());
|
|
if (!ArOrErr) {
|
|
std::string Buf;
|
|
raw_string_ostream OS(Buf);
|
|
logAllUnhandledErrors(ArOrErr.takeError(), OS, "");
|
|
OS.flush();
|
|
errs() << Buf;
|
|
return 1;
|
|
}
|
|
std::unique_ptr<object::Archive> &Ar = ArOrErr.get();
|
|
|
|
object::OwningBinary<object::Archive> OB(std::move(Ar), std::move(ArBuf));
|
|
|
|
EE->addArchive(std::move(OB));
|
|
}
|
|
|
|
// 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) {
|
|
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()) {
|
|
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) {
|
|
errs() << '\'' << 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
|
|
errs() << "Warning: host does not support external remote targets.\n"
|
|
<< " Defaulting to local execution\n";
|
|
return -1;
|
|
#else
|
|
if (ChildExecPath.empty()) {
|
|
errs() << "-remote-mcjit requires -mcjit-remote-process.\n";
|
|
exit(1);
|
|
} else if (!sys::fs::can_execute(ChildExecPath)) {
|
|
errs() << "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),
|
|
nullptr);
|
|
|
|
// 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);
|
|
errs() << "ERROR: exit(" << Result << ") returned!\n";
|
|
abort();
|
|
} else {
|
|
errs() << "ERROR: 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 implemantation, not the
|
|
// MCJIT itself. FIXME.
|
|
|
|
// Lanch the remote process and get a channel to it.
|
|
std::unique_ptr<FDRPCChannel> C = launchRemote();
|
|
if (!C) {
|
|
errs() << "Failed to launch remote JIT.\n";
|
|
exit(1);
|
|
}
|
|
|
|
// Create a remote target client running over the channel.
|
|
typedef orc::remote::OrcRemoteTargetClient<orc::remote::RPCChannel> MyRemote;
|
|
MyRemote R = ExitOnErr(MyRemote::Create(*C));
|
|
|
|
// Create a remote memory manager.
|
|
std::unique_ptr<MyRemote::RCMemoryManager> RemoteMM;
|
|
ExitOnErr(R.createRemoteMemoryManager(RemoteMM));
|
|
|
|
// 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 RuntimeDyld::SymbolInfo(Addr, JITSymbolFlags::Exported);
|
|
return RuntimeDyld::SymbolInfo(nullptr);
|
|
}
|
|
));
|
|
|
|
// Grab the target address of the JIT'd main function on the remote and call
|
|
// it.
|
|
// FIXME: argv and envp handling.
|
|
orc::TargetAddress Entry = EE->getFunctionAddress(EntryFn->getName().str());
|
|
EE->finalizeObject();
|
|
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<FDRPCChannel> 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<FDRPCChannel>(PipeFD[1][0], PipeFD[0][1]);
|
|
#endif
|
|
}
|