| /* |
| * 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; |
| } |
| |
| int inline_Metadata(Metadata* metadata) const { |
| masm()->align(BytesPerWord); |
| int offset = masm()->offset(); |
| masm()->store_Metadata(metadata); |
| 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 |