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49 lines
1.8 KiB
C++
49 lines
1.8 KiB
C++
//===- MemoryObject.h - Abstract memory interface ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_MEMORYOBJECT_H
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#define LLVM_SUPPORT_MEMORYOBJECT_H
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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/// Abstract base class for contiguous addressable memory. Necessary for cases
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/// in which the memory is in another process, in a file, or on a remote
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/// machine. All size and offset parameters are uint64_ts, to allow 32-bit
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/// processes access to 64-bit address spaces.
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class MemoryObject {
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public:
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virtual ~MemoryObject();
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/// Returns the size of the region in bytes. (The region is contiguous, so
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/// the highest valid address of the region is getExtent() - 1).
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///
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/// @result - The size of the region.
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virtual uint64_t getExtent() const = 0;
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/// Tries to read a contiguous range of bytes from the region, up to the end
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/// of the region. You should override this function if there is a quicker way
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/// than going back and forth with individual bytes.
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///
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/// @param address - The address of the first byte, in the same space as
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/// getBase().
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/// @param size - The number of bytes to copy.
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/// @param buf - A pointer to a buffer to be filled in. Must be non-NULL
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/// and large enough to hold size bytes.
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/// @result - 0 if successful; -1 if not. Failure may be due to a
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/// bounds violation or an implementation-specific error.
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virtual int readBytes(uint64_t address, uint64_t size,
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uint8_t *buf) const = 0;
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};
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}
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#endif
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