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 #include "precompiled.hpp"
26 #include "classfile/classFileStream.hpp"
27 #include "classfile/vmSymbols.hpp"
28
29 void ClassFileStream::truncated_file_error(TRAPS) {
30 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), "Truncated class file");
31 }
32
33 ClassFileStream::ClassFileStream(u1* buffer, int length, const char* source) {
34 _buffer_start = buffer;
35 _buffer_end = buffer + length;
36 _current = buffer;
37 _source = source;
38 _need_verify = false;
39 }
40
41 u1 ClassFileStream::get_u1(TRAPS) {
42 if (_need_verify) {
43 guarantee_more(1, CHECK_0);
44 } else {
45 assert(1 <= _buffer_end - _current, "buffer overflow");
46 }
47 return *_current++;
48 }
49
50 u2 ClassFileStream::get_u2(TRAPS) {
51 if (_need_verify) {
52 guarantee_more(2, CHECK_0);
53 } else {
54 assert(2 <= _buffer_end - _current, "buffer overflow");
55 }
56 u1* tmp = _current;
57 _current += 2;
58 return Bytes::get_Java_u2(tmp);
59 }
60
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1 /*
2 * Copyright (c) 1997, 2019, 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 #include "precompiled.hpp"
26 #include "classfile/classFileStream.hpp"
27 #include "classfile/vmSymbols.hpp"
28
29 void ClassFileStream::truncated_file_error(TRAPS) {
30 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), "Truncated class file");
31 }
32
33 ClassFileStream::ClassFileStream(u1* buffer, int length, const char* source) {
34 _buffer_start = buffer;
35 _buffer_end = buffer + length;
36 _current = buffer;
37 _source = source;
38 _need_verify = false;
39 }
40
41 const u1* ClassFileStream::clone_buffer() const {
42 u1* const new_buffer_start = NEW_RESOURCE_ARRAY(u1, length());
43 memcpy(new_buffer_start, _buffer_start, length());
44 return new_buffer_start;
45 }
46
47 const char* const ClassFileStream::clone_source() const {
48 const char* const src = source();
49 char* source_copy = NULL;
50 if (src != NULL) {
51 size_t source_len = strlen(src);
52 source_copy = NEW_RESOURCE_ARRAY(char, source_len + 1);
53 strncpy(source_copy, src, source_len + 1);
54 }
55 return source_copy;
56 }
57
58 // Caller responsible for ResourceMark
59 // clone stream with a rewound position
60 const ClassFileStream* ClassFileStream::clone() const {
61 const u1* const new_buffer_start = clone_buffer();
62 return new ClassFileStream(const_cast<u1*>(new_buffer_start),
63 length(),
64 clone_source()/*,
65 need_verify()*/);
66 }
67
68 u1 ClassFileStream::get_u1(TRAPS) {
69 if (_need_verify) {
70 guarantee_more(1, CHECK_0);
71 } else {
72 assert(1 <= _buffer_end - _current, "buffer overflow");
73 }
74 return *_current++;
75 }
76
77 u2 ClassFileStream::get_u2(TRAPS) {
78 if (_need_verify) {
79 guarantee_more(2, CHECK_0);
80 } else {
81 assert(2 <= _buffer_end - _current, "buffer overflow");
82 }
83 u1* tmp = _current;
84 _current += 2;
85 return Bytes::get_Java_u2(tmp);
86 }
87
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