1 files changed, 70 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/ExecutionEngine/Orc/TPCDynamicLibrarySearchGenerator.cpp b/contrib/llvm-project/llvm/lib/ExecutionEngine/Orc/TPCDynamicLibrarySearchGenerator.cpp
new file mode 100644
index 000000000000..bbf3ada1d4ba
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/ExecutionEngine/Orc/TPCDynamicLibrarySearchGenerator.cpp
@@ -0,0 +1,70 @@
+//===---------------- TPCDynamicLibrarySearchGenerator.cpp ----------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ExecutionEngine/Orc/TPCDynamicLibrarySearchGenerator.h"
+
+namespace llvm {
+namespace orc {
+
+Expected<std::unique_ptr<TPCDynamicLibrarySearchGenerator>>
+TPCDynamicLibrarySearchGenerator::Load(TargetProcessControl &TPC,
+                                       const char *LibraryPath,
+                                       SymbolPredicate Allow) {
+  auto Handle = TPC.loadDylib(LibraryPath);
+  if (!Handle)
+    return Handle.takeError();
+
+  return std::make_unique<TPCDynamicLibrarySearchGenerator>(TPC, *Handle,
+                                                            std::move(Allow));
+}
+
+Error TPCDynamicLibrarySearchGenerator::tryToGenerate(
+    LookupState &LS, LookupKind K, JITDylib &JD,
+    JITDylibLookupFlags JDLookupFlags, const SymbolLookupSet &Symbols) {
+
+  if (Symbols.empty())
+    return Error::success();
+
+  SymbolLookupSet LookupSymbols;
+
+  for (auto &KV : Symbols) {
+    // Skip symbols that don't match the filter.
+    if (Allow && !Allow(KV.first))
+      continue;
+    LookupSymbols.add(KV.first, SymbolLookupFlags::WeaklyReferencedSymbol);
+  }
+
+  SymbolMap NewSymbols;
+
+  TargetProcessControl::LookupRequest Request(H, LookupSymbols);
+  auto Result = TPC.lookupSymbols(Request);
+  if (!Result)
+    return Result.takeError();
+
+  assert(Result->size() == 1 && "Results for more than one library returned");
+  assert(Result->front().size() == LookupSymbols.size() &&
+         "Result has incorrect number of elements");
+
+  auto ResultI = Result->front().begin();
+  for (auto &KV : LookupSymbols) {
+    if (*ResultI)
+      NewSymbols[KV.first] =
+          JITEvaluatedSymbol(*ResultI, JITSymbolFlags::Exported);
+    ++ResultI;
+  }
+
+  // If there were no resolved symbols bail out.
+  if (NewSymbols.empty())
+    return Error::success();
+
+  // Define resolved symbols.
+  return JD.define(absoluteSymbols(std::move(NewSymbols)));
+}
+
+} // end namespace orc
+} // end namespace llvm