[ORC] Update JITCompileCallbackManager to support multi-threaded code.

Previously JITCompileCallbackManager only supported single threaded code. This
patch embeds a VSO (see include/llvm/ExecutionEngine/Orc/Core.h) in the callback
manager. The VSO ensures that the compile callback is only executed once and that
the resulting address cached for use by subsequent re-entries.

llvm-svn: 333490

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/tools/lli/lli.cpp b/llvm/tools/lli/lli.cpp
index 17957c97e2c..07075c2496d 100644
--- a/llvm/tools/lli/lli.cpp
+++ b/llvm/tools/lli/lli.cpp
@@ -612,8 +612,10 @@ int main(int argc, char **argv, char * const *envp) {
     }
 
     // Create a remote target client running over the channel.
+    llvm::orc::ExecutionSession ES;
+    ES.setErrorReporter([&](Error Err) { ExitOnErr(std::move(Err)); });
     typedef orc::remote::OrcRemoteTargetClient MyRemote;
-    auto R = ExitOnErr(MyRemote::Create(*C, ExitOnErr));
+    auto R = ExitOnErr(MyRemote::Create(*C, ES));
 
     // Create a remote memory manager.
     auto RemoteMM = ExitOnErr(R->createRemoteMemoryManager());