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annotate src/share/vm/classfile/classFileStream.hpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | c18cbe5936b8 |
| children | b92c45f2bc75 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_CLASSFILE_CLASSFILESTREAM_HPP |
| 26 #define SHARE_VM_CLASSFILE_CLASSFILESTREAM_HPP | |
| 27 | |
| 28 #include "utilities/top.hpp" | |
| 29 #ifdef TARGET_ARCH_x86 | |
| 30 # include "bytes_x86.hpp" | |
| 31 #endif | |
| 32 #ifdef TARGET_ARCH_sparc | |
| 33 # include "bytes_sparc.hpp" | |
| 34 #endif | |
| 35 #ifdef TARGET_ARCH_zero | |
| 36 # include "bytes_zero.hpp" | |
| 37 #endif | |
| 38 | |
| 0 | 39 // Input stream for reading .class file |
| 40 // | |
| 41 // The entire input stream is present in a buffer allocated by the caller. | |
| 42 // The caller is responsible for deallocating the buffer and for using | |
| 43 // ResourceMarks appropriately when constructing streams. | |
| 44 | |
| 45 class ClassFileStream: public ResourceObj { | |
| 46 private: | |
| 47 u1* _buffer_start; // Buffer bottom | |
| 48 u1* _buffer_end; // Buffer top (one past last element) | |
| 49 u1* _current; // Current buffer position | |
| 50 char* _source; // Source of stream (directory name, ZIP/JAR archive name) | |
| 51 bool _need_verify; // True if verification is on for the class file | |
| 52 | |
| 53 void truncated_file_error(TRAPS); | |
| 54 public: | |
| 55 // Constructor | |
| 56 ClassFileStream(u1* buffer, int length, char* source); | |
| 57 | |
| 58 // Buffer access | |
| 59 u1* buffer() const { return _buffer_start; } | |
| 60 int length() const { return _buffer_end - _buffer_start; } | |
| 61 u1* current() const { return _current; } | |
| 62 void set_current(u1* pos) { _current = pos; } | |
| 63 char* source() const { return _source; } | |
| 64 void set_verify(bool flag) { _need_verify = flag; } | |
| 65 | |
| 66 void check_truncated_file(bool b, TRAPS) { | |
| 67 if (b) { | |
| 68 truncated_file_error(THREAD); | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 void guarantee_more(int size, TRAPS) { | |
| 73 size_t remaining = (size_t)(_buffer_end - _current); | |
| 74 unsigned int usize = (unsigned int)size; | |
| 75 check_truncated_file(usize > remaining, CHECK); | |
| 76 } | |
| 77 | |
| 78 // Read u1 from stream | |
| 79 u1 get_u1(TRAPS); | |
| 80 u1 get_u1_fast() { | |
| 81 return *_current++; | |
| 82 } | |
| 83 | |
| 84 // Read u2 from stream | |
| 85 u2 get_u2(TRAPS); | |
| 86 u2 get_u2_fast() { | |
| 87 u2 res = Bytes::get_Java_u2(_current); | |
| 88 _current += 2; | |
| 89 return res; | |
| 90 } | |
| 91 | |
| 92 // Read u4 from stream | |
| 93 u4 get_u4(TRAPS); | |
| 94 u4 get_u4_fast() { | |
| 95 u4 res = Bytes::get_Java_u4(_current); | |
| 96 _current += 4; | |
| 97 return res; | |
| 98 } | |
| 99 | |
| 100 // Read u8 from stream | |
| 101 u8 get_u8(TRAPS); | |
| 102 u8 get_u8_fast() { | |
| 103 u8 res = Bytes::get_Java_u8(_current); | |
| 104 _current += 8; | |
| 105 return res; | |
| 106 } | |
| 107 | |
| 108 // Get direct pointer into stream at current position. | |
| 109 // Returns NULL if length elements are not remaining. The caller is | |
| 110 // responsible for calling skip below if buffer contents is used. | |
| 111 u1* get_u1_buffer() { | |
| 112 return _current; | |
| 113 } | |
| 114 | |
| 115 u2* get_u2_buffer() { | |
| 116 return (u2*) _current; | |
| 117 } | |
| 118 | |
| 119 // Skip length u1 or u2 elements from stream | |
| 120 void skip_u1(int length, TRAPS); | |
| 121 void skip_u1_fast(int length) { | |
| 122 _current += length; | |
| 123 } | |
| 124 | |
| 125 void skip_u2(int length, TRAPS); | |
| 126 void skip_u2_fast(int length) { | |
| 127 _current += 2 * length; | |
| 128 } | |
| 129 | |
| 130 // Tells whether eos is reached | |
| 131 bool at_eos() const { return _current == _buffer_end; } | |
| 132 }; | |
| 1972 | 133 |
| 134 #endif // SHARE_VM_CLASSFILE_CLASSFILESTREAM_HPP |