forked from OSchip/llvm-project
156 lines
4.8 KiB
C++
156 lines
4.8 KiB
C++
//===- OrcLazyJIT.cpp - Basic Orc-based JIT for lazy execution ------------===//
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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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#include "OrcLazyJIT.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include "llvm/Support/CodeGen.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/DynamicLibrary.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FileSystem.h"
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#include <system_error>
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using namespace llvm;
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namespace {
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enum class DumpKind {
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NoDump,
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DumpFuncsToStdOut,
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DumpModsToStdOut,
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DumpModsToDisk
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};
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} // end anonymous namespace
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static cl::opt<DumpKind> OrcDumpKind(
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"orc-lazy-debug", cl::desc("Debug dumping for the orc-lazy JIT."),
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cl::init(DumpKind::NoDump),
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cl::values(clEnumValN(DumpKind::NoDump, "no-dump", "Don't dump anything."),
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clEnumValN(DumpKind::DumpFuncsToStdOut, "funcs-to-stdout",
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"Dump function names to stdout."),
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clEnumValN(DumpKind::DumpModsToStdOut, "mods-to-stdout",
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"Dump modules to stdout."),
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clEnumValN(DumpKind::DumpModsToDisk, "mods-to-disk",
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"Dump modules to the current "
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"working directory. (WARNING: "
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"will overwrite existing files).")),
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cl::Hidden);
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static cl::opt<bool> OrcInlineStubs("orc-lazy-inline-stubs",
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cl::desc("Try to inline stubs"),
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cl::init(true), cl::Hidden);
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OrcLazyJIT::TransformFtor OrcLazyJIT::createDebugDumper() {
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switch (OrcDumpKind) {
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case DumpKind::NoDump:
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return [](std::unique_ptr<Module> M) { return M; };
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case DumpKind::DumpFuncsToStdOut:
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return [](std::unique_ptr<Module> M) {
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printf("[ ");
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for (const auto &F : *M) {
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if (F.isDeclaration())
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continue;
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if (F.hasName()) {
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std::string Name(F.getName());
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printf("%s ", Name.c_str());
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} else
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printf("<anon> ");
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}
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printf("]\n");
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return M;
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};
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case DumpKind::DumpModsToStdOut:
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return [](std::unique_ptr<Module> M) {
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outs() << "----- Module Start -----\n"
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<< *M << "----- Module End -----\n";
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return M;
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};
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case DumpKind::DumpModsToDisk:
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return [](std::unique_ptr<Module> M) {
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std::error_code EC;
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raw_fd_ostream Out(M->getModuleIdentifier() + ".ll", EC, sys::fs::F_Text);
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if (EC) {
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errs() << "Couldn't open " << M->getModuleIdentifier()
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<< " for dumping.\nError:" << EC.message() << "\n";
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exit(1);
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}
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Out << *M;
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return M;
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};
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}
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llvm_unreachable("Unknown DumpKind");
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}
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// Defined in lli.cpp.
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CodeGenOpt::Level getOptLevel();
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template <typename PtrTy>
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static PtrTy fromTargetAddress(JITTargetAddress Addr) {
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return reinterpret_cast<PtrTy>(static_cast<uintptr_t>(Addr));
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}
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int llvm::runOrcLazyJIT(std::vector<std::unique_ptr<Module>> Ms,
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const std::vector<std::string> &Args) {
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// Add the program's symbols into the JIT's search space.
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if (sys::DynamicLibrary::LoadLibraryPermanently(nullptr)) {
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errs() << "Error loading program symbols.\n";
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return 1;
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}
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// Grab a target machine and try to build a factory function for the
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// target-specific Orc callback manager.
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EngineBuilder EB;
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EB.setOptLevel(getOptLevel());
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auto TM = std::unique_ptr<TargetMachine>(EB.selectTarget());
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Triple T(TM->getTargetTriple());
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auto IndirectStubsMgrBuilder = orc::createLocalIndirectStubsManagerBuilder(T);
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// If we couldn't build a stubs-manager-builder for this target then bail out.
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if (!IndirectStubsMgrBuilder) {
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errs() << "No indirect stubs manager available for target '"
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<< TM->getTargetTriple().str() << "'.\n";
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return 1;
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}
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// Everything looks good. Build the JIT.
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OrcLazyJIT J(std::move(TM), std::move(IndirectStubsMgrBuilder),
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OrcInlineStubs);
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// Add the module, look up main and run it.
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for (auto &M : Ms)
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cantFail(J.addModule(std::move(M)));
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if (auto MainSym = J.findSymbol("main")) {
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typedef int (*MainFnPtr)(int, const char*[]);
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std::vector<const char *> ArgV;
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for (auto &Arg : Args)
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ArgV.push_back(Arg.c_str());
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auto Main = fromTargetAddress<MainFnPtr>(cantFail(MainSym.getAddress()));
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return Main(ArgV.size(), (const char**)ArgV.data());
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} else if (auto Err = MainSym.takeError())
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logAllUnhandledErrors(std::move(Err), llvm::errs(), "");
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else
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errs() << "Could not find main function.\n";
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return 1;
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}
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