1 files changed, 18 insertions, 4 deletions
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
index fa8906869b3..79a1bbb1a77 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
@@ -16,6 +16,7 @@
 #include "llvm/MC/MCInst.h"
 #include "llvm/Support/Path.h"
 #include <cctype>
+#include <future>
 #include <memory>
 #include <utility>
 
@@ -729,15 +730,29 @@ bool RuntimeDyldCheckerImpl::checkAllRulesInBuffer(StringRef RulePrefix,
   return DidAllTestsPass && (NumRules != 0);
 }
 
+Expected<JITSymbolResolver::LookupResult> RuntimeDyldCheckerImpl::lookup(
+    const JITSymbolResolver::LookupSet &Symbols) const {
+  auto ResultP = std::make_shared<
+      std::promise<Expected<JITSymbolResolver::LookupResult>>>();
+  auto ResultF = ResultP->get_future();
+
+  getRTDyld().Resolver.lookup(
+      Symbols, [=](Expected<JITSymbolResolver::LookupResult> Result) {
+        ResultP->set_value(std::move(Result));
+      });
+  return ResultF.get();
+}
+
 bool RuntimeDyldCheckerImpl::isSymbolValid(StringRef Symbol) const {
   if (getRTDyld().getSymbol(Symbol))
     return true;
-  JITSymbolResolver::LookupSet Symbols({Symbol});
-  auto Result = getRTDyld().Resolver.lookup(Symbols);
+  auto Result = lookup({Symbol});
+
   if (!Result) {
     logAllUnhandledErrors(Result.takeError(), errs(), "RTDyldChecker: ");
     return false;
   }
+
   assert(Result->count(Symbol) && "Missing symbol result");
   return true;
 }
@@ -751,8 +766,7 @@ uint64_t RuntimeDyldCheckerImpl::getSymbolRemoteAddr(StringRef Symbol) const {
   if (auto InternalSymbol = getRTDyld().getSymbol(Symbol))
     return InternalSymbol.getAddress();
 
-  JITSymbolResolver::LookupSet Symbols({Symbol});
-  auto Result = getRTDyld().Resolver.lookup(Symbols);
+  auto Result = lookup({Symbol});
   if (!Result) {
     logAllUnhandledErrors(Result.takeError(), errs(), "RTDyldChecker: ");
     return 0;