/*
* Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2009 Red Hat, Inc.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef SHARE_VM_SHARK_SHARKCODEBUFFER_HPP
#define SHARE_VM_SHARK_SHARKCODEBUFFER_HPP
#include "asm/codeBuffer.hpp"
#include "memory/allocation.hpp"
#include "shark/llvmHeaders.hpp"
class SharkCodeBuffer : public StackObj {
public:
SharkCodeBuffer(MacroAssembler* masm)
: _masm(masm), _base_pc(NULL) {}
private:
MacroAssembler* _masm;
llvm::Value* _base_pc;
private:
MacroAssembler* masm() const {
return _masm;
}
public:
llvm::Value* base_pc() const {
return _base_pc;
}
void set_base_pc(llvm::Value* base_pc) {
assert(_base_pc == NULL, "only do this once");
_base_pc = base_pc;
}
// Allocate some space in the buffer and return its address.
// This buffer will have been relocated by the time the method
// is installed, so you can't inline the result in code.
public:
void* malloc(size_t size) const {
masm()->align(BytesPerWord);
void *result = masm()->pc();
masm()->advance(size);
return result;
}
// Create a unique offset in the buffer.
public:
int create_unique_offset() const {
int offset = masm()->offset();
masm()->advance(1);
return offset;
}
// Inline an oop into the buffer and return its offset.
public:
int inline_oop(jobject object) const {
masm()->align(BytesPerWord);
int offset = masm()->offset();
masm()->store_oop(object);
return offset;
}
// Inline a block of non-oop data into the buffer and return its offset.
public:
int inline_data(void *src, size_t size) const {
masm()->align(BytesPerWord);
int offset = masm()->offset();
void *dst = masm()->pc();
masm()->advance(size);
memcpy(dst, src, size);
return offset;
}
};
#endif // SHARE_VM_SHARK_SHARKCODEBUFFER_HPP