Wed, 03 Jul 2019 20:42:37 +0800
Merge
aoqi@0 | 1 | /* |
iklam@7090 | 2 | * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "classfile/classFileStream.hpp" |
aoqi@0 | 27 | #include "classfile/vmSymbols.hpp" |
aoqi@0 | 28 | |
aoqi@0 | 29 | void ClassFileStream::truncated_file_error(TRAPS) { |
aoqi@0 | 30 | THROW_MSG(vmSymbols::java_lang_ClassFormatError(), "Truncated class file"); |
aoqi@0 | 31 | } |
aoqi@0 | 32 | |
iklam@7090 | 33 | ClassFileStream::ClassFileStream(u1* buffer, int length, const char* source) { |
aoqi@0 | 34 | _buffer_start = buffer; |
aoqi@0 | 35 | _buffer_end = buffer + length; |
aoqi@0 | 36 | _current = buffer; |
aoqi@0 | 37 | _source = source; |
aoqi@0 | 38 | _need_verify = false; |
aoqi@0 | 39 | } |
aoqi@0 | 40 | |
aoqi@0 | 41 | u1 ClassFileStream::get_u1(TRAPS) { |
aoqi@0 | 42 | if (_need_verify) { |
aoqi@0 | 43 | guarantee_more(1, CHECK_0); |
aoqi@0 | 44 | } else { |
aoqi@0 | 45 | assert(1 <= _buffer_end - _current, "buffer overflow"); |
aoqi@0 | 46 | } |
aoqi@0 | 47 | return *_current++; |
aoqi@0 | 48 | } |
aoqi@0 | 49 | |
aoqi@0 | 50 | u2 ClassFileStream::get_u2(TRAPS) { |
aoqi@0 | 51 | if (_need_verify) { |
aoqi@0 | 52 | guarantee_more(2, CHECK_0); |
aoqi@0 | 53 | } else { |
aoqi@0 | 54 | assert(2 <= _buffer_end - _current, "buffer overflow"); |
aoqi@0 | 55 | } |
aoqi@0 | 56 | u1* tmp = _current; |
aoqi@0 | 57 | _current += 2; |
aoqi@0 | 58 | return Bytes::get_Java_u2(tmp); |
aoqi@0 | 59 | } |
aoqi@0 | 60 | |
aoqi@0 | 61 | u4 ClassFileStream::get_u4(TRAPS) { |
aoqi@0 | 62 | if (_need_verify) { |
aoqi@0 | 63 | guarantee_more(4, CHECK_0); |
aoqi@0 | 64 | } else { |
aoqi@0 | 65 | assert(4 <= _buffer_end - _current, "buffer overflow"); |
aoqi@0 | 66 | } |
aoqi@0 | 67 | u1* tmp = _current; |
aoqi@0 | 68 | _current += 4; |
aoqi@0 | 69 | return Bytes::get_Java_u4(tmp); |
aoqi@0 | 70 | } |
aoqi@0 | 71 | |
aoqi@0 | 72 | u8 ClassFileStream::get_u8(TRAPS) { |
aoqi@0 | 73 | if (_need_verify) { |
aoqi@0 | 74 | guarantee_more(8, CHECK_0); |
aoqi@0 | 75 | } else { |
aoqi@0 | 76 | assert(8 <= _buffer_end - _current, "buffer overflow"); |
aoqi@0 | 77 | } |
aoqi@0 | 78 | u1* tmp = _current; |
aoqi@0 | 79 | _current += 8; |
aoqi@0 | 80 | return Bytes::get_Java_u8(tmp); |
aoqi@0 | 81 | } |
aoqi@0 | 82 | |
aoqi@0 | 83 | void ClassFileStream::skip_u1(int length, TRAPS) { |
aoqi@0 | 84 | if (_need_verify) { |
aoqi@0 | 85 | guarantee_more(length, CHECK); |
aoqi@0 | 86 | } |
aoqi@0 | 87 | _current += length; |
aoqi@0 | 88 | } |
aoqi@0 | 89 | |
aoqi@0 | 90 | void ClassFileStream::skip_u2(int length, TRAPS) { |
aoqi@0 | 91 | if (_need_verify) { |
aoqi@0 | 92 | guarantee_more(length * 2, CHECK); |
aoqi@0 | 93 | } |
aoqi@0 | 94 | _current += length * 2; |
aoqi@0 | 95 | } |
aoqi@0 | 96 | |
aoqi@0 | 97 | void ClassFileStream::skip_u4(int length, TRAPS) { |
aoqi@0 | 98 | if (_need_verify) { |
aoqi@0 | 99 | guarantee_more(length * 4, CHECK); |
aoqi@0 | 100 | } |
aoqi@0 | 101 | _current += length * 4; |
aoqi@0 | 102 | } |