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//===-- RTDyldObjectLinkingLayer.cpp - RuntimeDyld backed ORC ObjectLayer -===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
namespace {
using namespace llvm;
using namespace llvm::orc;
class VSOSearchOrderResolver : public JITSymbolResolver {
public:
VSOSearchOrderResolver(ExecutionSession &ES,
MaterializationResponsibility &MR)
: ES(ES), MR(MR) {}
Expected<LookupResult> lookup(const LookupSet &Symbols) {
SymbolNameSet InternedSymbols;
for (auto &S : Symbols)
InternedSymbols.insert(ES.getSymbolStringPool().intern(S));
auto AsyncLookup = [&](std::shared_ptr<AsynchronousSymbolQuery> Q,
SymbolNameSet Names) {
SymbolNameSet Unresolved = std::move(Names);
MR.getTargetVSO().withSearchOrderDo([&](const VSOList &SearchOrder) {
for (auto *V : SearchOrder) {
assert(V && "VSOList entry can not be null");
Unresolved = V->lookup(Q, std::move(Unresolved));
}
});
return Unresolved;
};
auto InternedResult = blockingLookup(
ES, std::move(AsyncLookup), std::move(InternedSymbols), false, &MR);
if (!InternedResult)
return InternedResult.takeError();
LookupResult Result;
for (auto &KV : *InternedResult)
Result[*KV.first] = std::move(KV.second);
return Result;
}
Expected<LookupFlagsResult> lookupFlags(const LookupSet &Symbols) {
SymbolNameSet InternedSymbols;
for (auto &S : Symbols)
InternedSymbols.insert(ES.getSymbolStringPool().intern(S));
SymbolFlagsMap InternedResult;
MR.getTargetVSO().withSearchOrderDo([&](const VSOList &VSOs) {
// An empty search order is pathalogical, but allowed.
if (VSOs.empty())
return;
assert(VSOs.front() && "VSOList entry can not be null");
InternedResult = VSOs.front()->lookupFlags(InternedSymbols);
});
LookupFlagsResult Result;
for (auto &KV : InternedResult)
Result[*KV.first] = std::move(KV.second);
return Result;
}
private:
ExecutionSession &ES;
MaterializationResponsibility &MR;
};
} // end anonymous namespace
namespace llvm {
namespace orc {
RTDyldObjectLinkingLayer2::RTDyldObjectLinkingLayer2(
ExecutionSession &ES, GetMemoryManagerFunction GetMemoryManager,
NotifyLoadedFunction NotifyLoaded, NotifyFinalizedFunction NotifyFinalized)
: ObjectLayer(ES), GetMemoryManager(GetMemoryManager),
NotifyLoaded(std::move(NotifyLoaded)),
NotifyFinalized(std::move(NotifyFinalized)), ProcessAllSections(false) {}
void RTDyldObjectLinkingLayer2::emit(MaterializationResponsibility R,
VModuleKey K,
std::unique_ptr<MemoryBuffer> O) {
assert(O && "Object must not be null");
auto &ES = getExecutionSession();
auto ObjFile = object::ObjectFile::createObjectFile(*O);
if (!ObjFile) {
getExecutionSession().reportError(ObjFile.takeError());
R.failMaterialization();
}
auto MemoryManager = GetMemoryManager(K);
VSOSearchOrderResolver Resolver(ES, R);
auto RTDyld = llvm::make_unique<RuntimeDyld>(*MemoryManager, Resolver);
RTDyld->setProcessAllSections(ProcessAllSections);
{
std::lock_guard<std::mutex> Lock(RTDyldLayerMutex);
assert(!ActiveRTDylds.count(K) &&
"An active RTDyld already exists for this key?");
ActiveRTDylds[K] = RTDyld.get();
assert(!MemMgrs.count(K) &&
"A memory manager already exists for this key?");
MemMgrs[K] = std::move(MemoryManager);
}
auto Info = RTDyld->loadObject(**ObjFile);
{
std::set<StringRef> InternalSymbols;
for (auto &Sym : (*ObjFile)->symbols()) {
if (!(Sym.getFlags() & object::BasicSymbolRef::SF_Global)) {
if (auto SymName = Sym.getName())
InternalSymbols.insert(*SymName);
else {
ES.reportError(SymName.takeError());
R.failMaterialization();
return;
}
}
}
SymbolMap Symbols;
for (auto &KV : RTDyld->getSymbolTable())
if (!InternalSymbols.count(KV.first))
Symbols[ES.getSymbolStringPool().intern(KV.first)] = KV.second;
R.resolve(Symbols);
}
if (NotifyLoaded)
NotifyLoaded(K, **ObjFile, *Info);
RTDyld->finalizeWithMemoryManagerLocking();
{
std::lock_guard<std::mutex> Lock(RTDyldLayerMutex);
ActiveRTDylds.erase(K);
}
if (RTDyld->hasError()) {
ES.reportError(make_error<StringError>(RTDyld->getErrorString(),
inconvertibleErrorCode()));
R.failMaterialization();
return;
}
R.finalize();
if (NotifyFinalized)
NotifyFinalized(K);
}
void RTDyldObjectLinkingLayer2::mapSectionAddress(
VModuleKey K, const void *LocalAddress, JITTargetAddress TargetAddr) const {
std::lock_guard<std::mutex> Lock(RTDyldLayerMutex);
auto ActiveRTDyldItr = ActiveRTDylds.find(K);
assert(ActiveRTDyldItr != ActiveRTDylds.end() &&
"No active RTDyld instance found for key");
ActiveRTDyldItr->second->mapSectionAddress(LocalAddress, TargetAddr);
}
} // End namespace orc.
} // End namespace llvm.
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