1/* 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2009 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26#ifndef SHARE_VM_SHARK_SHARKCODEBUFFER_HPP 27#define SHARE_VM_SHARK_SHARKCODEBUFFER_HPP 28 29#include "asm/codeBuffer.hpp" 30#include "memory/allocation.hpp" 31#include "shark/llvmHeaders.hpp" 32 33class SharkCodeBuffer : public StackObj { 34 public: 35 SharkCodeBuffer(MacroAssembler* masm) 36 : _masm(masm), _base_pc(NULL) {} 37 38 private: 39 MacroAssembler* _masm; 40 llvm::Value* _base_pc; 41 42 private: 43 MacroAssembler* masm() const { 44 return _masm; 45 } 46 47 public: 48 llvm::Value* base_pc() const { 49 return _base_pc; 50 } 51 void set_base_pc(llvm::Value* base_pc) { 52 assert(_base_pc == NULL, "only do this once"); 53 _base_pc = base_pc; 54 } 55 56 // Allocate some space in the buffer and return its address. 57 // This buffer will have been relocated by the time the method 58 // is installed, so you can't inline the result in code. 59 public: 60 void* malloc(size_t size) const { 61 masm()->align(BytesPerWord); 62 void *result = masm()->pc(); 63 masm()->advance(size); 64 return result; 65 } 66 67 // Create a unique offset in the buffer. 68 public: 69 int create_unique_offset() const { 70 int offset = masm()->offset(); 71 masm()->advance(1); 72 return offset; 73 } 74 75 // Inline an oop into the buffer and return its offset. 76 public: 77 int inline_oop(jobject object) const { 78 masm()->align(BytesPerWord); 79 int offset = masm()->offset(); 80 masm()->store_oop(object); 81 return offset; 82 } 83 84 int inline_Metadata(Metadata* metadata) const { 85 masm()->align(BytesPerWord); 86 int offset = masm()->offset(); 87 masm()->store_Metadata(metadata); 88 return offset; 89 } 90 91 // Inline a block of non-oop data into the buffer and return its offset. 92 public: 93 int inline_data(void *src, size_t size) const { 94 masm()->align(BytesPerWord); 95 int offset = masm()->offset(); 96 void *dst = masm()->pc(); 97 masm()->advance(size); 98 memcpy(dst, src, size); 99 return offset; 100 } 101}; 102 103#endif // SHARE_VM_SHARK_SHARKCODEBUFFER_HPP 104