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src/share/vm/classfile/classFileStream.cpp@40f45911050f (annotated)

src/share/vm/classfile/classFileStream.cpp

Thu, 25 Aug 2016 09:23:45 -0400

author

zgu

date

Thu, 25 Aug 2016 09:23:45 -0400

changeset 9969

40f45911050f

parent 9858

b985cbb00e68

child 9931

fd44df5e3bc3

permissions

-rw-r--r--

8148854: Class names "SomeClass" and "LSomeClass;" treated by JVM as an equivalent
Summary: Added default format checking of class names loaded by the app class loader
Reviewed-by: andrew

duke@435	1	/*
iklam@7090	2	* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#include "classfile/classFileStream.hpp"
stefank@2314	27	#include "classfile/vmSymbols.hpp"
duke@435	28
duke@435	29	void ClassFileStream::truncated_file_error(TRAPS) {
duke@435	30	THROW_MSG(vmSymbols::java_lang_ClassFormatError(), "Truncated class file");
duke@435	31	}
duke@435	32
apetushkov@9858	33	ClassFileStream::ClassFileStream(u1* buffer, int length, const char* source, bool need_verify) {
duke@435	34	_buffer_start = buffer;
duke@435	35	_buffer_end = buffer + length;
duke@435	36	_current = buffer;
duke@435	37	_source = source;
apetushkov@9858	38	_need_verify = need_verify;
duke@435	39	}
duke@435	40
duke@435	41	u1 ClassFileStream::get_u1(TRAPS) {
duke@435	42	if (_need_verify) {
duke@435	43	guarantee_more(1, CHECK_0);
duke@435	44	} else {
duke@435	45	assert(1 <= _buffer_end - _current, "buffer overflow");
duke@435	46	}
duke@435	47	return *_current++;
duke@435	48	}
duke@435	49
duke@435	50	u2 ClassFileStream::get_u2(TRAPS) {
duke@435	51	if (_need_verify) {
duke@435	52	guarantee_more(2, CHECK_0);
duke@435	53	} else {
duke@435	54	assert(2 <= _buffer_end - _current, "buffer overflow");
duke@435	55	}
duke@435	56	u1* tmp = _current;
duke@435	57	_current += 2;
duke@435	58	return Bytes::get_Java_u2(tmp);
duke@435	59	}
duke@435	60
duke@435	61	u4 ClassFileStream::get_u4(TRAPS) {
duke@435	62	if (_need_verify) {
duke@435	63	guarantee_more(4, CHECK_0);
duke@435	64	} else {
duke@435	65	assert(4 <= _buffer_end - _current, "buffer overflow");
duke@435	66	}
duke@435	67	u1* tmp = _current;
duke@435	68	_current += 4;
duke@435	69	return Bytes::get_Java_u4(tmp);
duke@435	70	}
duke@435	71
duke@435	72	u8 ClassFileStream::get_u8(TRAPS) {
duke@435	73	if (_need_verify) {
duke@435	74	guarantee_more(8, CHECK_0);
duke@435	75	} else {
duke@435	76	assert(8 <= _buffer_end - _current, "buffer overflow");
duke@435	77	}
duke@435	78	u1* tmp = _current;
duke@435	79	_current += 8;
duke@435	80	return Bytes::get_Java_u8(tmp);
duke@435	81	}
duke@435	82
duke@435	83	void ClassFileStream::skip_u1(int length, TRAPS) {
duke@435	84	if (_need_verify) {
duke@435	85	guarantee_more(length, CHECK);
duke@435	86	}
duke@435	87	_current += length;
duke@435	88	}
duke@435	89
duke@435	90	void ClassFileStream::skip_u2(int length, TRAPS) {
duke@435	91	if (_need_verify) {
duke@435	92	guarantee_more(length * 2, CHECK);
duke@435	93	}
duke@435	94	_current += length * 2;
duke@435	95	}
coleenp@4398	96
coleenp@4398	97	void ClassFileStream::skip_u4(int length, TRAPS) {
coleenp@4398	98	if (_need_verify) {
coleenp@4398	99	guarantee_more(length * 4, CHECK);
coleenp@4398	100	}
coleenp@4398	101	_current += length * 4;
coleenp@4398	102	}
apetushkov@9858	103
apetushkov@9858	104	#if INCLUDE_JFR
apetushkov@9858	105
apetushkov@9858	106	u1* ClassFileStream::clone_buffer() const {
apetushkov@9858	107	u1* const new_buffer_start = NEW_RESOURCE_ARRAY(u1, length());
apetushkov@9858	108	memcpy(new_buffer_start, _buffer_start, length());
apetushkov@9858	109	return new_buffer_start;
apetushkov@9858	110	}
apetushkov@9858	111
apetushkov@9858	112	const char* const ClassFileStream::clone_source() const {
apetushkov@9858	113	const char* const src = source();
apetushkov@9858	114	char* source_copy = NULL;
apetushkov@9858	115	if (src != NULL) {
apetushkov@9858	116	size_t source_len = strlen(src);
apetushkov@9858	117	source_copy = NEW_RESOURCE_ARRAY(char, source_len + 1);
apetushkov@9858	118	strncpy(source_copy, src, source_len + 1);
apetushkov@9858	119	}
apetushkov@9858	120	return source_copy;
apetushkov@9858	121	}
apetushkov@9858	122
apetushkov@9858	123	ClassFileStream* ClassFileStream::clone() const {
apetushkov@9858	124	u1* const new_buffer_start = clone_buffer();
apetushkov@9858	125	return new ClassFileStream(new_buffer_start,
apetushkov@9858	126	length(),
apetushkov@9858	127	clone_source(),
apetushkov@9858	128	need_verify());
apetushkov@9858	129	}
apetushkov@9858	130	#endif // INCLUDE_JFR