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//===---- llvm-jitlink.h - Session and format-specific decls ----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// llvm-jitlink Session class and tool utilities.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_JITLINK_LLVM_JITLINK_H
#define LLVM_TOOLS_LLVM_JITLINK_LLVM_JITLINK_H
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ExecutionEngine/Orc/Core.h"
#include "llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h"
#include "llvm/ExecutionEngine/Orc/OrcRPCTargetProcessControl.h"
#include "llvm/ExecutionEngine/Orc/Shared/FDRawByteChannel.h"
#include "llvm/ExecutionEngine/Orc/Shared/RPCUtils.h"
#include "llvm/ExecutionEngine/Orc/TargetProcessControl.h"
#include "llvm/ExecutionEngine/RuntimeDyldChecker.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/Regex.h"
#include "llvm/Support/raw_ostream.h"
#include <vector>
namespace llvm {
struct Session;
/// ObjectLinkingLayer with additional support for symbol promotion.
class LLVMJITLinkObjectLinkingLayer : public orc::ObjectLinkingLayer {
public:
using orc::ObjectLinkingLayer::add;
LLVMJITLinkObjectLinkingLayer(Session &S,
jitlink::JITLinkMemoryManager &MemMgr);
Error add(orc::ResourceTrackerSP RT,
std::unique_ptr<MemoryBuffer> O) override;
private:
Session &S;
};
using LLVMJITLinkChannel = orc::shared::FDRawByteChannel;
using LLVMJITLinkRPCEndpoint =
orc::shared::MultiThreadedRPCEndpoint<LLVMJITLinkChannel>;
using LLVMJITLinkRemoteMemoryManager =
orc::OrcRPCTPCJITLinkMemoryManager<LLVMJITLinkRPCEndpoint>;
using LLVMJITLinkRemoteMemoryAccess =
orc::OrcRPCTPCMemoryAccess<LLVMJITLinkRPCEndpoint>;
class LLVMJITLinkRemoteTargetProcessControl
: public orc::OrcRPCTargetProcessControlBase<LLVMJITLinkRPCEndpoint> {
public:
using BaseT = orc::OrcRPCTargetProcessControlBase<LLVMJITLinkRPCEndpoint>;
static Expected<std::unique_ptr<TargetProcessControl>> LaunchExecutor();
static Expected<std::unique_ptr<TargetProcessControl>> ConnectToExecutor();
Error disconnect() override;
private:
using LLVMJITLinkRemoteMemoryAccess =
orc::OrcRPCTPCMemoryAccess<LLVMJITLinkRemoteTargetProcessControl>;
using LLVMJITLinkRemoteMemoryManager =
orc::OrcRPCTPCJITLinkMemoryManager<LLVMJITLinkRemoteTargetProcessControl>;
LLVMJITLinkRemoteTargetProcessControl(
std::shared_ptr<orc::SymbolStringPool> SSP,
std::unique_ptr<LLVMJITLinkChannel> Channel,
std::unique_ptr<LLVMJITLinkRPCEndpoint> Endpoint,
ErrorReporter ReportError, Error &Err)
: BaseT(std::move(SSP), *Endpoint, std::move(ReportError)),
Channel(std::move(Channel)), Endpoint(std::move(Endpoint)) {
ErrorAsOutParameter _(&Err);
ListenerThread = std::thread([&]() {
while (!Finished) {
if (auto Err = this->Endpoint->handleOne()) {
reportError(std::move(Err));
return;
}
}
});
if (auto Err2 = initializeORCRPCTPCBase()) {
Err = joinErrors(std::move(Err2), disconnect());
return;
}
OwnedMemAccess = std::make_unique<LLVMJITLinkRemoteMemoryAccess>(*this);
MemAccess = OwnedMemAccess.get();
OwnedMemMgr = std::make_unique<LLVMJITLinkRemoteMemoryManager>(*this);
MemMgr = OwnedMemMgr.get();
}
std::unique_ptr<LLVMJITLinkChannel> Channel;
std::unique_ptr<LLVMJITLinkRPCEndpoint> Endpoint;
std::unique_ptr<TargetProcessControl::MemoryAccess> OwnedMemAccess;
std::unique_ptr<jitlink::JITLinkMemoryManager> OwnedMemMgr;
std::atomic<bool> Finished{false};
std::thread ListenerThread;
};
struct Session {
std::unique_ptr<orc::TargetProcessControl> TPC;
orc::ExecutionSession ES;
orc::JITDylib *MainJD;
LLVMJITLinkObjectLinkingLayer ObjLayer;
std::vector<orc::JITDylib *> JDSearchOrder;
~Session();
static Expected<std::unique_ptr<Session>> Create(Triple TT);
void dumpSessionInfo(raw_ostream &OS);
void modifyPassConfig(const Triple &FTT,
jitlink::PassConfiguration &PassConfig);
using MemoryRegionInfo = RuntimeDyldChecker::MemoryRegionInfo;
struct FileInfo {
StringMap<MemoryRegionInfo> SectionInfos;
StringMap<MemoryRegionInfo> StubInfos;
StringMap<MemoryRegionInfo> GOTEntryInfos;
};
using SymbolInfoMap = StringMap<MemoryRegionInfo>;
using FileInfoMap = StringMap<FileInfo>;
Expected<FileInfo &> findFileInfo(StringRef FileName);
Expected<MemoryRegionInfo &> findSectionInfo(StringRef FileName,
StringRef SectionName);
Expected<MemoryRegionInfo &> findStubInfo(StringRef FileName,
StringRef TargetName);
Expected<MemoryRegionInfo &> findGOTEntryInfo(StringRef FileName,
StringRef TargetName);
bool isSymbolRegistered(StringRef Name);
Expected<MemoryRegionInfo &> findSymbolInfo(StringRef SymbolName,
Twine ErrorMsgStem);
SymbolInfoMap SymbolInfos;
FileInfoMap FileInfos;
uint64_t SizeBeforePruning = 0;
uint64_t SizeAfterFixups = 0;
StringSet<> HarnessFiles;
StringSet<> HarnessExternals;
StringSet<> HarnessDefinitions;
DenseMap<StringRef, StringRef> CanonicalWeakDefs;
private:
Session(std::unique_ptr<orc::TargetProcessControl> TPC, Error &Err);
};
/// Record symbols, GOT entries, stubs, and sections for ELF file.
Error registerELFGraphInfo(Session &S, jitlink::LinkGraph &G);
/// Record symbols, GOT entries, stubs, and sections for MachO file.
Error registerMachOGraphInfo(Session &S, jitlink::LinkGraph &G);
} // end namespace llvm
#endif // LLVM_TOOLS_LLVM_JITLINK_LLVM_JITLINK_H
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