[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, 6 insertions, 3 deletions

diff --git a/llvm/examples/Kaleidoscope/BuildingAJIT/Chapter5/toy.cpp b/llvm/examples/Kaleidoscope/BuildingAJIT/Chapter5/toy.cpp
index 10b60bd12d1..415cc751277 100644
--- a/llvm/examples/Kaleidoscope/BuildingAJIT/Chapter5/toy.cpp
+++ b/llvm/examples/Kaleidoscope/BuildingAJIT/Chapter5/toy.cpp
@@ -1243,7 +1243,9 @@ std::unique_ptr<FDRPCChannel> connect() {
   sockaddr_in servAddr;
   memset(&servAddr, 0, sizeof(servAddr));
   servAddr.sin_family = PF_INET;
-  memcpy(&servAddr.sin_addr.s_addr, server->h_addr, server->h_length);
+  char *src;
+  memcpy(&src, &server->h_addr, sizeof(char *));
+  memcpy(&servAddr.sin_addr.s_addr, src, server->h_length);
   servAddr.sin_port = htons(Port);
   if (connect(sockfd, reinterpret_cast<sockaddr*>(&servAddr),
               sizeof(servAddr)) < 0) {
@@ -1276,9 +1278,10 @@ int main(int argc, char *argv[]) {
   BinopPrecedence['-'] = 20;
   BinopPrecedence['*'] = 40; // highest.
 
+  ExecutionSession ES;
   auto TCPChannel = connect();
-  auto Remote = ExitOnErr(MyRemote::Create(*TCPChannel, ExitOnErr));
-  TheJIT = llvm::make_unique<KaleidoscopeJIT>(*Remote);
+  auto Remote = ExitOnErr(MyRemote::Create(*TCPChannel, ES));
+  TheJIT = llvm::make_unique<KaleidoscopeJIT>(ES, *Remote);
 
   // Automatically inject a definition for 'printExprResult'.
   FunctionProtos["printExprResult"] =