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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 JITDylibSearchOrderResolver : public JITSymbolResolver {
public:
JITDylibSearchOrderResolver(MaterializationResponsibility &MR) : MR(MR) {}
void lookup(const LookupSet &Symbols, OnResolvedFunction OnResolved) {
auto &ES = MR.getTargetJITDylib().getExecutionSession();
SymbolNameSet InternedSymbols;
// Intern the requested symbols: lookup takes interned strings.
for (auto &S : Symbols)
InternedSymbols.insert(ES.getSymbolStringPool().intern(S));
// Build an OnResolve callback to unwrap the interned strings and pass them
// to the OnResolved callback.
// FIXME: Switch to move capture of OnResolved once we have c++14.
auto OnResolvedWithUnwrap =
[OnResolved](Expected<SymbolMap> InternedResult) {
if (!InternedResult) {
OnResolved(InternedResult.takeError());
return;
}
LookupResult Result;
for (auto &KV : *InternedResult)
Result[*KV.first] = std::move(KV.second);
OnResolved(Result);
};
// We're not waiting for symbols to be ready. Just log any errors.
auto OnReady = [&ES](Error Err) { ES.reportError(std::move(Err)); };
// Register dependencies for all symbols contained in this set.
auto RegisterDependencies = [&](const SymbolDependenceMap &Deps) {
MR.addDependenciesForAll(Deps);
};
MR.getTargetJITDylib().withSearchOrderDo([&](const JITDylibList &JDs) {
ES.lookup(JDs, InternedSymbols, OnResolvedWithUnwrap, OnReady,
RegisterDependencies);
});
}
Expected<LookupSet> getResponsibilitySet(const LookupSet &Symbols) {
LookupSet Result;
for (auto &KV : MR.getSymbols()) {
if (Symbols.count(*KV.first))
Result.insert(*KV.first);
}
return Result;
}
private:
MaterializationResponsibility &MR;
};
} // end anonymous namespace
namespace llvm {
namespace orc {
RTDyldObjectLinkingLayer2::RTDyldObjectLinkingLayer2(
ExecutionSession &ES, GetMemoryManagerFunction GetMemoryManager,
NotifyLoadedFunction NotifyLoaded, NotifyEmittedFunction NotifyEmitted)
: ObjectLayer(ES), GetMemoryManager(GetMemoryManager),
NotifyLoaded(std::move(NotifyLoaded)),
NotifyEmitted(std::move(NotifyEmitted)) {}
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);
JITDylibSearchOrderResolver Resolver(R);
auto RTDyld = llvm::make_unique<RuntimeDyld>(*MemoryManager, Resolver);
RTDyld->setProcessAllSections(ProcessAllSections);
{
std::lock_guard<std::mutex> Lock(RTDyldLayerMutex);
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;
}
}
}
SymbolFlagsMap ExtraSymbolsToClaim;
SymbolMap Symbols;
for (auto &KV : RTDyld->getSymbolTable()) {
// Scan the symbols and add them to the Symbols map for resolution.
// We never claim internal symbols.
if (InternalSymbols.count(KV.first))
continue;
auto InternedName = ES.getSymbolStringPool().intern(KV.first);
auto Flags = KV.second.getFlags();
// Override object flags and claim responsibility for symbols if
// requested.
if (OverrideObjectFlags || AutoClaimObjectSymbols) {
auto I = R.getSymbols().find(InternedName);
if (OverrideObjectFlags && I != R.getSymbols().end())
Flags = JITSymbolFlags::stripTransientFlags(I->second);
else if (AutoClaimObjectSymbols && I == R.getSymbols().end())
ExtraSymbolsToClaim[InternedName] = Flags;
}
Symbols[InternedName] = JITEvaluatedSymbol(KV.second.getAddress(), Flags);
}
if (!ExtraSymbolsToClaim.empty())
if (auto Err = R.defineMaterializing(ExtraSymbolsToClaim)) {
ES.reportError(std::move(Err));
R.failMaterialization();
return;
}
R.resolve(Symbols);
}
if (NotifyLoaded)
NotifyLoaded(K, **ObjFile, *Info);
RTDyld->finalizeWithMemoryManagerLocking();
if (RTDyld->hasError()) {
ES.reportError(make_error<StringError>(RTDyld->getErrorString(),
inconvertibleErrorCode()));
R.failMaterialization();
return;
}
R.emit();
if (NotifyEmitted)
NotifyEmitted(K);
}
} // End namespace orc.
} // End namespace llvm.
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