Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileStream.cpp @ 3762:5c0a3c1858b1
7048782: CMS: assert(last_chunk_index_to_check<= last_chunk_index) failed: parCardTableModRefBS.cpp:359
Summary: The LNC array is sized before the start of a scavenge, while the heap may expand during a scavenge. With CMS, the last block of an arbitrary suffice of the LNC array may expand due to coalition with the expansion delta. We now take care not to attempt access past the end of the LNC array. LNC array code will be cleaned up and suitably encapsulated as part of the forthcoming performance RFE 7043675.
Reviewed-by: brutisso
| author | ysr |
|---|---|
| date | Thu, 02 Jun 2011 10:23:36 -0700 |
| parents | f95d63e2154a |
| children | ade95d680b42 |
| 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 #include "precompiled.hpp" |
| 26 #include "classfile/classFileStream.hpp" | |
| 27 #include "classfile/vmSymbols.hpp" | |
| 0 | 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, 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 | |
| 61 u4 ClassFileStream::get_u4(TRAPS) { | |
| 62 if (_need_verify) { | |
| 63 guarantee_more(4, CHECK_0); | |
| 64 } else { | |
| 65 assert(4 <= _buffer_end - _current, "buffer overflow"); | |
| 66 } | |
| 67 u1* tmp = _current; | |
| 68 _current += 4; | |
| 69 return Bytes::get_Java_u4(tmp); | |
| 70 } | |
| 71 | |
| 72 u8 ClassFileStream::get_u8(TRAPS) { | |
| 73 if (_need_verify) { | |
| 74 guarantee_more(8, CHECK_0); | |
| 75 } else { | |
| 76 assert(8 <= _buffer_end - _current, "buffer overflow"); | |
| 77 } | |
| 78 u1* tmp = _current; | |
| 79 _current += 8; | |
| 80 return Bytes::get_Java_u8(tmp); | |
| 81 } | |
| 82 | |
| 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 } |