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src/share/vm/classfile/classFileStream.cpp@ac27a9c85bea (annotated)

src/share/vm/classfile/classFileStream.cpp

Thu, 24 May 2018 18:41:44 +0800

author

aoqi

date

Thu, 24 May 2018 18:41:44 +0800

changeset 8856

ac27a9c85bea

parent 7535

7ae4e26cb1e0

child 9931

fd44df5e3bc3

permissions

-rw-r--r--

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	}