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Merge pull request #3976 from MerryMage/rm-code_block

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common: CodeBlock is unused
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Weiyi Wang 2018-07-23 09:21:37 +03:00 committed by GitHub
commit 87872aa369
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2 changed files with 0 additions and 86 deletions
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1
src/common/CMakeLists.txt
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@ -49,7 +49,6 @@ add_library(common STATIC
chunk_file.h
cityhash.cpp
cityhash.h
code_block.h
color.h
common_funcs.h
common_paths.h

85
src/common/code_block.h
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@ -1,85 +0,0 @@
// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#pragma once
#include <cstddef>
#include "common/common_types.h"
#include "common/memory_util.h"
// Everything that needs to generate code should inherit from this.
// You get memory management for free, plus, you can use all emitter functions without
// having to prefix them with gen-> or something similar.
// Example implementation:
// class JIT : public CodeBlock<ARMXEmitter> {}
template <class T>
class CodeBlock : public T, NonCopyable {
private:
// A privately used function to set the executable RAM space to something invalid.
// For debugging usefulness it should be used to set the RAM to a host specific breakpoint
// instruction
virtual void PoisonMemory() = 0;
protected:
u8* region;
size_t region_size;
public:
CodeBlock() : region(nullptr), region_size(0) {}
virtual ~CodeBlock() {
if (region)
FreeCodeSpace();
}
// Call this before you generate any code.
void AllocCodeSpace(int size) {
region_size = size;
region = (u8*)AllocateExecutableMemory(region_size);
T::SetCodePtr(region);
}
// Always clear code space with breakpoints, so that if someone accidentally executes
// uninitialized, it just breaks into the debugger.
void ClearCodeSpace() {
PoisonMemory();
ResetCodePtr();
}
// Call this when shutting down. Don't rely on the destructor, even though it'll do the job.
void FreeCodeSpace() {
#ifdef __SYMBIAN32__
ResetExecutableMemory(region);
#else
FreeMemoryPages(region, region_size);
#endif
region = nullptr;
region_size = 0;
}
bool IsInSpace(const u8* ptr) {
return (ptr >= region) && (ptr < (region + region_size));
}
// Cannot currently be undone. Will write protect the entire code region.
// Start over if you need to change the code (call FreeCodeSpace(), AllocCodeSpace()).
void WriteProtect() {
WriteProtectMemory(region, region_size, true);
}
void ResetCodePtr() {
T::SetCodePtr(region);
}
size_t GetSpaceLeft() const {
return region_size - (T::GetCodePtr() - region);
}
u8* GetBasePtr() {
return region;
}
size_t GetOffset(const u8* ptr) const {
return ptr - region;
}
};