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);
83 void ClassFileStream::skip_u1(int length, TRAPS) {
84 if (_need_verify) {
85 guarantee_more(length, CHECK);
86 }
87 _current += length;
88 }
89
90 void ClassFileStream::skip_u2(int length, TRAPS) {
91 if (_need_verify) {
92 guarantee_more(length * 2, CHECK);
93 }
94 _current += length * 2;
95 }
96
97 void ClassFileStream::skip_u4(int length, TRAPS) {
98 if (_need_verify) {
99 guarantee_more(length * 4, CHECK);
100 }
101 _current += length * 4;
102 }
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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, bool need_verify) {
34 _buffer_start = buffer;
35 _buffer_end = buffer + length;
36 _current = buffer;
37 _source = source;
38 _need_verify = need_verify;
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);
83 void ClassFileStream::skip_u1(int length, TRAPS) {
84 if (_need_verify) {
85 guarantee_more(length, CHECK);
86 }
87 _current += length;
88 }
89
90 void ClassFileStream::skip_u2(int length, TRAPS) {
91 if (_need_verify) {
92 guarantee_more(length * 2, CHECK);
93 }
94 _current += length * 2;
95 }
96
97 void ClassFileStream::skip_u4(int length, TRAPS) {
98 if (_need_verify) {
99 guarantee_more(length * 4, CHECK);
100 }
101 _current += length * 4;
102 }
103
104 #if INCLUDE_JFR
105
106 u1* ClassFileStream::clone_buffer() const {
107 u1* const new_buffer_start = NEW_RESOURCE_ARRAY(u1, length());
108 memcpy(new_buffer_start, _buffer_start, length());
109 return new_buffer_start;
110 }
111
112 const char* const ClassFileStream::clone_source() const {
113 const char* const src = source();
114 char* source_copy = NULL;
115 if (src != NULL) {
116 size_t source_len = strlen(src);
117 source_copy = NEW_RESOURCE_ARRAY(char, source_len + 1);
118 strncpy(source_copy, src, source_len + 1);
119 }
120 return source_copy;
121 }
122
123 ClassFileStream* ClassFileStream::clone() const {
124 u1* const new_buffer_start = clone_buffer();
125 return new ClassFileStream(new_buffer_start,
126 length(),
127 clone_source(),
128 need_verify());
129 }
130 #endif // INCLUDE_JFR
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