[LKH] Add a replacement RTDyldLayer.

llvm-svn: 332918

2 files changed, 97 insertions, 0 deletions

diff --git a/llvm/lib/ExecutionEngine/Orc/CMakeLists.txt b/llvm/lib/ExecutionEngine/Orc/CMakeLists.txt
index ec0d0e0796b..aaa968f073e 100644
--- a/llvm/lib/ExecutionEngine/Orc/CMakeLists.txt
+++ b/llvm/lib/ExecutionEngine/Orc/CMakeLists.txt
@@ -10,6 +10,7 @@ add_llvm_library(LLVMOrcJIT
   OrcError.cpp
   OrcMCJITReplacement.cpp
   RPCUtils.cpp
+  RTDyldObjectLinkingLayer.cpp
 
   ADDITIONAL_HEADER_DIRS
   ${LLVM_MAIN_INCLUDE_DIR}/llvm/ExecutionEngine/Orc
diff --git a/llvm/lib/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.cpp b/llvm/lib/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.cpp
new file mode 100644
index 00000000000..c635ab0f883
--- /dev/null
+++ b/llvm/lib/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.cpp
@@ -0,0 +1,96 @@
+//===-- 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 llvm {
+namespace orc {
+
+RTDyldObjectLinkingLayer2::RTDyldObjectLinkingLayer2(
+    ExecutionSession &ES, ResourcesGetterFunction GetResources,
+    NotifyLoadedFunction NotifyLoaded, NotifyFinalizedFunction NotifyFinalized)
+    : ObjectLayer(ES), GetResources(std::move(GetResources)),
+      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 has already been materialized");
+
+  auto &ES = getExecutionSession();
+
+  auto ObjFile = object::ObjectFile::createObjectFile(*O);
+  if (!ObjFile) {
+    getExecutionSession().reportError(ObjFile.takeError());
+    R.failMaterialization();
+  }
+
+  auto Resources = GetResources(K);
+
+  JITSymbolResolverAdapter ResolverAdapter(ES, *Resources.Resolver, &R);
+  auto RTDyld =
+      llvm::make_unique<RuntimeDyld>(*Resources.MemMgr, ResolverAdapter);
+  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] = Resources.MemMgr;
+  }
+
+  auto Info = RTDyld->loadObject(**ObjFile);
+
+  {
+    SymbolMap Symbols;
+    for (auto &KV : RTDyld->getSymbolTable())
+      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();
+  }
+
+  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.