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//===- OrcLazyJIT.cpp - Basic Orc-based JIT for lazy execution ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "OrcLazyJIT.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <system_error>
using namespace llvm;
namespace {
enum class DumpKind {
NoDump,
DumpFuncsToStdOut,
DumpModsToStdOut,
DumpModsToDisk
};
} // end anonymous namespace
static cl::opt<DumpKind> OrcDumpKind(
"orc-lazy-debug", cl::desc("Debug dumping for the orc-lazy JIT."),
cl::init(DumpKind::NoDump),
cl::values(clEnumValN(DumpKind::NoDump, "no-dump", "Don't dump anything."),
clEnumValN(DumpKind::DumpFuncsToStdOut, "funcs-to-stdout",
"Dump function names to stdout."),
clEnumValN(DumpKind::DumpModsToStdOut, "mods-to-stdout",
"Dump modules to stdout."),
clEnumValN(DumpKind::DumpModsToDisk, "mods-to-disk",
"Dump modules to the current "
"working directory. (WARNING: "
"will overwrite existing files).")),
cl::Hidden);
static cl::opt<bool> OrcInlineStubs("orc-lazy-inline-stubs",
cl::desc("Try to inline stubs"),
cl::init(true), cl::Hidden);
OrcLazyJIT::TransformFtor OrcLazyJIT::createDebugDumper() {
switch (OrcDumpKind) {
case DumpKind::NoDump:
return [](std::shared_ptr<Module> M) { return M; };
case DumpKind::DumpFuncsToStdOut:
return [](std::shared_ptr<Module> M) {
printf("[ ");
for (const auto &F : *M) {
if (F.isDeclaration())
continue;
if (F.hasName()) {
std::string Name(F.getName());
printf("%s ", Name.c_str());
} else
printf("<anon> ");
}
printf("]\n");
return M;
};
case DumpKind::DumpModsToStdOut:
return [](std::shared_ptr<Module> M) {
outs() << "----- Module Start -----\n" << *M
<< "----- Module End -----\n";
return M;
};
case DumpKind::DumpModsToDisk:
return [](std::shared_ptr<Module> M) {
std::error_code EC;
raw_fd_ostream Out(M->getModuleIdentifier() + ".ll", EC,
sys::fs::F_Text);
if (EC) {
errs() << "Couldn't open " << M->getModuleIdentifier()
<< " for dumping.\nError:" << EC.message() << "\n";
exit(1);
}
Out << *M;
return M;
};
}
llvm_unreachable("Unknown DumpKind");
}
// Defined in lli.cpp.
CodeGenOpt::Level getOptLevel();
template <typename PtrTy>
static PtrTy fromTargetAddress(JITTargetAddress Addr) {
return reinterpret_cast<PtrTy>(static_cast<uintptr_t>(Addr));
}
int llvm::runOrcLazyJIT(std::vector<std::unique_ptr<Module>> Ms,
const std::vector<std::string> &Args) {
// Add the program's symbols into the JIT's search space.
if (sys::DynamicLibrary::LoadLibraryPermanently(nullptr)) {
errs() << "Error loading program symbols.\n";
return 1;
}
// Grab a target machine and try to build a factory function for the
// target-specific Orc callback manager.
EngineBuilder EB;
EB.setOptLevel(getOptLevel());
auto TM = std::unique_ptr<TargetMachine>(EB.selectTarget());
Triple T(TM->getTargetTriple());
auto CompileCallbackMgr = orc::createLocalCompileCallbackManager(T, 0);
// If we couldn't build the factory function then there must not be a callback
// manager for this target. Bail out.
if (!CompileCallbackMgr) {
errs() << "No callback manager available for target '"
<< TM->getTargetTriple().str() << "'.\n";
return 1;
}
auto IndirectStubsMgrBuilder = orc::createLocalIndirectStubsManagerBuilder(T);
// If we couldn't build a stubs-manager-builder for this target then bail out.
if (!IndirectStubsMgrBuilder) {
errs() << "No indirect stubs manager available for target '"
<< TM->getTargetTriple().str() << "'.\n";
return 1;
}
// Everything looks good. Build the JIT.
OrcLazyJIT J(std::move(TM), std::move(CompileCallbackMgr),
std::move(IndirectStubsMgrBuilder),
OrcInlineStubs);
// Add the module, look up main and run it.
for (auto &M : Ms)
J.addModule(std::shared_ptr<Module>(std::move(M)));
auto MainSym = J.findSymbol("main");
if (!MainSym) {
errs() << "Could not find main function.\n";
return 1;
}
using MainFnPtr = int (*)(int, const char*[]);
std::vector<const char *> ArgV;
for (auto &Arg : Args)
ArgV.push_back(Arg.c_str());
auto Main = fromTargetAddress<MainFnPtr>(MainSym.getAddress());
return Main(ArgV.size(), (const char**)ArgV.data());
}
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