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comparison src/share/vm/shark/sharkCodeBuffer.hpp @ 1692:d2ede61b7a12

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6976186: integrate Shark HotSpot changes Summary: Shark is a JIT compiler for Zero that uses the LLVM compiler infrastructure. Reviewed-by: kvn, twisti Contributed-by: Gary Benson <gbenson@redhat.com>
author twisti
date Wed, 11 Aug 2010 05:51:21 -0700
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children f95d63e2154a
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1691:4a665be40fd3 1692:d2ede61b7a12
1 /*
2 * Copyright (c) 1999, 2007, 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 class SharkCodeBuffer : public StackObj {
27 public:
28 SharkCodeBuffer(MacroAssembler* masm)
29 : _masm(masm), _base_pc(NULL) {}
30
31 private:
32 MacroAssembler* _masm;
33 llvm::Value* _base_pc;
34
35 private:
36 MacroAssembler* masm() const {
37 return _masm;
38 }
39
40 public:
41 llvm::Value* base_pc() const {
42 return _base_pc;
43 }
44 void set_base_pc(llvm::Value* base_pc) {
45 assert(_base_pc == NULL, "only do this once");
46 _base_pc = base_pc;
47 }
48
49 // Allocate some space in the buffer and return its address.
50 // This buffer will have been relocated by the time the method
51 // is installed, so you can't inline the result in code.
52 public:
53 void* malloc(size_t size) const {
54 masm()->align(BytesPerWord);
55 void *result = masm()->pc();
56 masm()->advance(size);
57 return result;
58 }
59
60 // Create a unique offset in the buffer.
61 public:
62 int create_unique_offset() const {
63 int offset = masm()->offset();
64 masm()->advance(1);
65 return offset;
66 }
67
68 // Inline an oop into the buffer and return its offset.
69 public:
70 int inline_oop(jobject object) const {
71 masm()->align(BytesPerWord);
72 int offset = masm()->offset();
73 masm()->store_oop(object);
74 return offset;
75 }
76
77 // Inline a block of non-oop data into the buffer and return its offset.
78 public:
79 int inline_data(void *src, size_t size) const {
80 masm()->align(BytesPerWord);
81 int offset = masm()->offset();
82 void *dst = masm()->pc();
83 masm()->advance(size);
84 memcpy(dst, src, size);
85 return offset;
86 }
87 };