// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
-//
-// This file defines the JITMemoryManagerInterface
-//
-//===----------------------------------------------------------------------===//
#ifndef LLVM_EXECUTION_ENGINE_JIT_MEMMANAGER_H
#define LLVM_EXECUTION_ENGINE_JIT_MEMMANAGER_H
+#include "llvm/ExecutionEngine/RuntimeDyld.h"
#include "llvm/Support/DataTypes.h"
#include <string>
/// memory for the code generated by the JIT. This can be reimplemented by
/// clients that have a strong desire to control how the layout of JIT'd memory
/// works.
-class JITMemoryManager {
+class JITMemoryManager : public RTDyldMemoryManager {
protected:
bool HasGOT;
- bool SizeRequired;
-public:
- JITMemoryManager() : HasGOT(false), SizeRequired(false) {}
+public:
+ JITMemoryManager() : HasGOT(false) {}
virtual ~JITMemoryManager();
-
+
/// CreateDefaultMemManager - This is used to create the default
/// JIT Memory Manager if the client does not provide one to the JIT.
static JITMemoryManager *CreateDefaultMemManager();
-
+
/// setMemoryWritable - When code generation is in progress,
/// the code pages may need permissions changed.
- virtual void setMemoryWritable(void) = 0;
+ virtual void setMemoryWritable() = 0;
/// setMemoryExecutable - When code generation is done and we're ready to
/// start execution, the code pages may need permissions changed.
- virtual void setMemoryExecutable(void) = 0;
+ virtual void setMemoryExecutable() = 0;
/// setPoisonMemory - Setting this flag to true makes the memory manager
/// garbage values over freed memory. This is useful for testing and
- /// debugging, and is be turned on by default in debug mode.
+ /// debugging, and may be turned on by default in debug mode.
virtual void setPoisonMemory(bool poison) = 0;
//===--------------------------------------------------------------------===//
/// method is invoked to allocate it. This method is required to set HasGOT
/// to true.
virtual void AllocateGOT() = 0;
-
+
/// isManagingGOT - Return true if the AllocateGOT method is called.
- ///
bool isManagingGOT() const {
return HasGOT;
}
-
+
/// getGOTBase - If this is managing a Global Offset Table, this method should
/// return a pointer to its base.
virtual uint8_t *getGOTBase() const = 0;
-
- /// SetDlsymTable - If the JIT must be able to relocate stubs after they have
- /// been emitted, potentially because they are being copied to a process
- /// where external symbols live at different addresses than in the JITing
- /// process, allocate a table with sufficient information to do so.
- virtual void SetDlsymTable(void *ptr) = 0;
-
- /// getDlsymTable - If this is managing a table of entries so that stubs to
- /// external symbols can be later relocated, this method should return a
- /// pointer to it.
- virtual void *getDlsymTable() const = 0;
-
- /// NeedsExactSize - If the memory manager requires to know the size of the
- /// objects to be emitted
- bool NeedsExactSize() const {
- return SizeRequired;
- }
//===--------------------------------------------------------------------===//
// Main Allocation Functions
/// startFunctionBody.
virtual uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize,
unsigned Alignment) = 0;
-
+
/// endFunctionBody - This method is called when the JIT is done codegen'ing
/// the specified function. At this point we know the size of the JIT
/// compiled function. This passes in FunctionStart (which was returned by
- /// the startFunctionBody method) and FunctionEnd which is a pointer to the
+ /// the startFunctionBody method) and FunctionEnd which is a pointer to the
/// actual end of the function. This method should mark the space allocated
/// and remember where it is in case the client wants to deallocate it.
virtual void endFunctionBody(const Function *F, uint8_t *FunctionStart,
virtual uint8_t *allocateSpace(intptr_t Size, unsigned Alignment) = 0;
/// allocateGlobal - Allocate memory for a global.
- ///
virtual uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment) = 0;
- /// deallocateMemForFunction - Free JIT memory for the specified function.
- /// This is never called when the JIT is currently emitting a function.
- virtual void deallocateMemForFunction(const Function *F) = 0;
-
+ /// deallocateFunctionBody - Free the specified function body. The argument
+ /// must be the return value from a call to startFunctionBody() that hasn't
+ /// been deallocated yet. This is never called when the JIT is currently
+ /// emitting a function.
+ virtual void deallocateFunctionBody(void *Body) = 0;
+
/// startExceptionTable - When we finished JITing the function, if exception
/// handling is set, we emit the exception table.
virtual uint8_t* startExceptionTable(const Function* F,
uintptr_t &ActualSize) = 0;
-
+
/// endExceptionTable - This method is called when the JIT is done emitting
/// the exception table.
virtual void endExceptionTable(const Function *F, uint8_t *TableStart,
uint8_t *TableEnd, uint8_t* FrameRegister) = 0;
+ /// deallocateExceptionTable - Free the specified exception table's memory.
+ /// The argument must be the return value from a call to startExceptionTable()
+ /// that hasn't been deallocated yet. This is never called when the JIT is
+ /// currently emitting an exception table.
+ virtual void deallocateExceptionTable(void *ET) = 0;
+
/// CheckInvariants - For testing only. Return true if all internal
/// invariants are preserved, or return false and set ErrorStr to a helpful
/// error message.
- virtual bool CheckInvariants(std::string &ErrorStr) {
+ virtual bool CheckInvariants(std::string &) {
return true;
}
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