Adding out-of-process execution support to lli.

At this time only Unix-based systems are supported.  Windows has stubs and should re-route to the simulated mode.

Thanks to Sriram Murali for contributions to this patch.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191843 91177308-0d34-0410-b5e6-96231b3b80d8

tools/lli/RemoteTarget.cpp

@@ -13,13 +13,44 @@
 //===----------------------------------------------------------------------===//
 
 #include "RemoteTarget.h"
+#include "RemoteTargetExternal.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/Memory.h"
 #include <stdlib.h>
 #include <string>
+
 using namespace llvm;
 
+// Static methods
+RemoteTarget *RemoteTarget::createRemoteTarget() {
+  return new RemoteTarget;
+}
+
+RemoteTarget *RemoteTarget::createExternalRemoteTarget(std::string &ChildName) {
+#ifdef LLVM_ON_UNIX
+  return new RemoteTargetExternal(ChildName);
+#else
+  return 0;
+#endif
+}
+
+bool RemoteTarget::hostSupportsExternalRemoteTarget() {
+#ifdef LLVM_ON_UNIX
+  return true;
+#else
+  return false;
+#endif
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Simulated remote execution
+//
+// This implementation will simply move generated code and data to a new memory
+// location in the current executable and let it run from there.
+////////////////////////////////////////////////////////////////////////////////
+
 bool RemoteTarget::allocateSpace(size_t Size, unsigned Alignment,
                                  uint64_t &Address) {
   sys::MemoryBlock *Prev = Allocations.size() ? &Allocations.back() : NULL;