1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_INTERPRETER_BYTECODE_HPP
26 #define SHARE_VM_INTERPRETER_BYTECODE_HPP
27
28 #include "interpreter/bytecodes.hpp"
29 #include "memory/allocation.hpp"
30 #include "oops/method.hpp"
31 #ifdef TARGET_ARCH_x86
32 # include "bytes_x86.hpp"
33 #endif
34 #ifdef TARGET_ARCH_sparc
35 # include "bytes_sparc.hpp"
36 #endif
37 #ifdef TARGET_ARCH_zero
38 # include "bytes_zero.hpp"
39 #endif
40 #ifdef TARGET_ARCH_arm
41 # include "bytes_arm.hpp"
42 #endif
43 #ifdef TARGET_ARCH_ppc
44 # include "bytes_ppc.hpp"
45 #endif
46
47 class ciBytecodeStream;
48
49 // The base class for different kinds of bytecode abstractions.
50 // Provides the primitive operations to manipulate code relative
51 // to the bcp.
52
53 class Bytecode: public StackObj {
54 protected:
55 const address _bcp;
56 const Bytecodes::Code _code;
57
58 // Address computation
59 address addr_at (int offset) const { return (address)_bcp + offset; }
60 u_char byte_at(int offset) const { return *addr_at(offset); }
61 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); }
62 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); }
63
64 // Word access:
65 int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); }
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1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_INTERPRETER_BYTECODE_HPP
26 #define SHARE_VM_INTERPRETER_BYTECODE_HPP
27
28 #include "interpreter/bytecodes.hpp"
29 #include "memory/allocation.hpp"
30 #include "oops/method.hpp"
31 #include "utilities/bytes.hpp"
32
33 class ciBytecodeStream;
34
35 // The base class for different kinds of bytecode abstractions.
36 // Provides the primitive operations to manipulate code relative
37 // to the bcp.
38
39 class Bytecode: public StackObj {
40 protected:
41 const address _bcp;
42 const Bytecodes::Code _code;
43
44 // Address computation
45 address addr_at (int offset) const { return (address)_bcp + offset; }
46 u_char byte_at(int offset) const { return *addr_at(offset); }
47 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); }
48 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); }
49
50 // Word access:
51 int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); }
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