MCJIT: Add faux remote target execution to lli for the MCJIT.

Simulate a remote target address space by allocating a seperate chunk of
memory for the target and re-mapping section addresses to that prior to
execution. Later we'll want to have a truly remote process, but for now
this gets us closer to being able to test the remote target
functionality outside LLDB.

rdar://12157052

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163216 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 78 insertions, 0 deletions

diff --git a/tools/lli/RecordingMemoryManager.h b/tools/lli/RecordingMemoryManager.h
new file mode 100644
index 0000000000..1590235a79
--- /dev/null
+++ b/tools/lli/RecordingMemoryManager.h
@@ -0,0 +1,78 @@
+//===- RecordingMemoryManager.h - LLI MCJIT recording memory manager ------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This memory manager allocates local storage and keeps a record of each
+// allocation. Iterators are provided for all data and code allocations.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef RECORDINGMEMORYMANAGER_H
+#define RECORDINGMEMORYMANAGER_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ExecutionEngine/JITMemoryManager.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Memory.h"
+#include <utility>
+
+namespace llvm {
+
+class RecordingMemoryManager : public JITMemoryManager {
+public:
+  typedef std::pair<sys::MemoryBlock, unsigned> Allocation;
+
+private:
+  SmallVector<Allocation, 16> AllocatedDataMem;
+  SmallVector<Allocation, 16> AllocatedCodeMem;
+
+public:
+  RecordingMemoryManager() {}
+  virtual ~RecordingMemoryManager() {}
+
+  typedef SmallVectorImpl<Allocation>::const_iterator const_data_iterator;
+  typedef SmallVectorImpl<Allocation>::const_iterator const_code_iterator;
+
+  const_data_iterator data_begin() const { return AllocatedDataMem.begin(); }
+  const_data_iterator   data_end() const { return AllocatedDataMem.end(); }
+  const_code_iterator code_begin() const { return AllocatedCodeMem.begin(); }
+  const_code_iterator   code_end() const { return AllocatedCodeMem.end(); }
+
+  uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+                                       unsigned SectionID);
+
+  uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+                                       unsigned SectionID);
+
+  void *getPointerToNamedFunction(const std::string &Name,
+                                  bool AbortOnFailure = true);
+  // The following obsolete JITMemoryManager calls are stubbed out for
+  // this model.
+  void setMemoryWritable();
+  void setMemoryExecutable();
+  void setPoisonMemory(bool poison);
+  void AllocateGOT();
+  uint8_t *getGOTBase() const;
+  uint8_t *startFunctionBody(const Function *F, uintptr_t &ActualSize);
+  uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize,
+                        unsigned Alignment);
+  void endFunctionBody(const Function *F, uint8_t *FunctionStart,
+                       uint8_t *FunctionEnd);
+  uint8_t *allocateSpace(intptr_t Size, unsigned Alignment);
+  uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment);
+  void deallocateFunctionBody(void *Body);
+  uint8_t* startExceptionTable(const Function* F, uintptr_t &ActualSize);
+  void endExceptionTable(const Function *F, uint8_t *TableStart,
+                         uint8_t *TableEnd, uint8_t* FrameRegister);
+  void deallocateExceptionTable(void *ET);
+
+};
+
+} // end namespace llvm
+
+#endif