jdk-sandbox: hotspot/src/share/vm/classfile/classFileStream.cpp@1c7168ea0034 (annotated)

1 489c9b5090e2 Initial load duke parents: diff changeset	1	/*
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	2	* Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
1 489c9b5090e2 Initial load duke parents: diff changeset	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
489c9b5090e2 Initial load duke parents: diff changeset	4	*
489c9b5090e2 Initial load duke parents: diff changeset	5	* This code is free software; you can redistribute it and/or modify it
489c9b5090e2 Initial load duke parents: diff changeset	6	* under the terms of the GNU General Public License version 2 only, as
489c9b5090e2 Initial load duke parents: diff changeset	7	* published by the Free Software Foundation.
489c9b5090e2 Initial load duke parents: diff changeset	8	*
489c9b5090e2 Initial load duke parents: diff changeset	9	* This code is distributed in the hope that it will be useful, but WITHOUT
489c9b5090e2 Initial load duke parents: diff changeset	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
489c9b5090e2 Initial load duke parents: diff changeset	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
489c9b5090e2 Initial load duke parents: diff changeset	12	* version 2 for more details (a copy is included in the LICENSE file that
489c9b5090e2 Initial load duke parents: diff changeset	13	* accompanied this code).
489c9b5090e2 Initial load duke parents: diff changeset	14	*
489c9b5090e2 Initial load duke parents: diff changeset	15	* You should have received a copy of the GNU General Public License version
489c9b5090e2 Initial load duke parents: diff changeset	16	* 2 along with this work; if not, write to the Free Software Foundation,
489c9b5090e2 Initial load duke parents: diff changeset	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
489c9b5090e2 Initial load duke parents: diff changeset	18	*
5547 f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1 diff changeset	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1 diff changeset	20	* or visit www.oracle.com if you need additional information or have any
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1 diff changeset	21	* questions.
1 489c9b5090e2 Initial load duke parents: diff changeset	22	*
489c9b5090e2 Initial load duke parents: diff changeset	23	*/
489c9b5090e2 Initial load duke parents: diff changeset	24
7397 5b173b4ca846 6989984: Use standard include model for Hospot stefank parents: 5547 diff changeset	25	#include "precompiled.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot stefank parents: 5547 diff changeset	26	#include "classfile/classFileStream.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot stefank parents: 5547 diff changeset	27	#include "classfile/vmSymbols.hpp"
1 489c9b5090e2 Initial load duke parents: diff changeset	28
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	29	const bool ClassFileStream::verify = true;
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	30	const bool ClassFileStream::no_verification = false;
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	31
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	32	void ClassFileStream::truncated_file_error(TRAPS) const {
1 489c9b5090e2 Initial load duke parents: diff changeset	33	THROW_MSG(vmSymbols::java_lang_ClassFormatError(), "Truncated class file");
489c9b5090e2 Initial load duke parents: diff changeset	34	}
489c9b5090e2 Initial load duke parents: diff changeset	35
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	36	ClassFileStream::ClassFileStream(const u1* buffer,
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	37	int length,
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	38	const char* source,
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	39	bool verify_stream) :
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	40	_buffer_start(buffer),
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	41	_buffer_end(buffer + length),
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	42	_current(buffer),
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	43	_source(source),
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	44	_need_verify(verify_stream) {}
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	45
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	46	const u1* ClassFileStream::clone_buffer() const {
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	47	u1* const new_buffer_start = NEW_RESOURCE_ARRAY(u1, length());
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	48	memcpy(new_buffer_start, _buffer_start, length());
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	49	return new_buffer_start;
1 489c9b5090e2 Initial load duke parents: diff changeset	50	}
489c9b5090e2 Initial load duke parents: diff changeset	51
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	52	const char* const ClassFileStream::clone_source() const {
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	53	const char* const src = source();
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	54	char* source_copy = NULL;
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	55	if (src != NULL) {
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	56	size_t source_len = strlen(src);
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	57	source_copy = NEW_RESOURCE_ARRAY(char, source_len + 1);
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	58	strncpy(source_copy, src, source_len + 1);
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	59	}
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	60	return source_copy;
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	61	}
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	62
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	63	// Caller responsible for ResourceMark
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	64	// clone stream with a rewound position
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	65	const ClassFileStream* ClassFileStream::clone() const {
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	66	const u1* const new_buffer_start = clone_buffer();
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	67	return new ClassFileStream(new_buffer_start,
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	68	length(),
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	69	clone_source(),
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	70	need_verify());
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	71	}
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	72
1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	73	u1 ClassFileStream::get_u1(TRAPS) const {
1 489c9b5090e2 Initial load duke parents: diff changeset	74	if (_need_verify) {
489c9b5090e2 Initial load duke parents: diff changeset	75	guarantee_more(1, CHECK_0);
489c9b5090e2 Initial load duke parents: diff changeset	76	} else {
489c9b5090e2 Initial load duke parents: diff changeset	77	assert(1 <= _buffer_end - _current, "buffer overflow");
489c9b5090e2 Initial load duke parents: diff changeset	78	}
489c9b5090e2 Initial load duke parents: diff changeset	79	return *_current++;
489c9b5090e2 Initial load duke parents: diff changeset	80	}
489c9b5090e2 Initial load duke parents: diff changeset	81
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	82	u2 ClassFileStream::get_u2(TRAPS) const {
1 489c9b5090e2 Initial load duke parents: diff changeset	83	if (_need_verify) {
489c9b5090e2 Initial load duke parents: diff changeset	84	guarantee_more(2, CHECK_0);
489c9b5090e2 Initial load duke parents: diff changeset	85	} else {
489c9b5090e2 Initial load duke parents: diff changeset	86	assert(2 <= _buffer_end - _current, "buffer overflow");
489c9b5090e2 Initial load duke parents: diff changeset	87	}
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	88	const u1* tmp = _current;
1 489c9b5090e2 Initial load duke parents: diff changeset	89	_current += 2;
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	90	return Bytes::get_Java_u2((address)tmp);
1 489c9b5090e2 Initial load duke parents: diff changeset	91	}
489c9b5090e2 Initial load duke parents: diff changeset	92
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	93	u4 ClassFileStream::get_u4(TRAPS) const {
1 489c9b5090e2 Initial load duke parents: diff changeset	94	if (_need_verify) {
489c9b5090e2 Initial load duke parents: diff changeset	95	guarantee_more(4, CHECK_0);
489c9b5090e2 Initial load duke parents: diff changeset	96	} else {
489c9b5090e2 Initial load duke parents: diff changeset	97	assert(4 <= _buffer_end - _current, "buffer overflow");
489c9b5090e2 Initial load duke parents: diff changeset	98	}
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	99	const u1* tmp = _current;
1 489c9b5090e2 Initial load duke parents: diff changeset	100	_current += 4;
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	101	return Bytes::get_Java_u4((address)tmp);
1 489c9b5090e2 Initial load duke parents: diff changeset	102	}
489c9b5090e2 Initial load duke parents: diff changeset	103
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	104	u8 ClassFileStream::get_u8(TRAPS) const {
1 489c9b5090e2 Initial load duke parents: diff changeset	105	if (_need_verify) {
489c9b5090e2 Initial load duke parents: diff changeset	106	guarantee_more(8, CHECK_0);
489c9b5090e2 Initial load duke parents: diff changeset	107	} else {
489c9b5090e2 Initial load duke parents: diff changeset	108	assert(8 <= _buffer_end - _current, "buffer overflow");
489c9b5090e2 Initial load duke parents: diff changeset	109	}
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	110	const u1* tmp = _current;
1 489c9b5090e2 Initial load duke parents: diff changeset	111	_current += 8;
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	112	return Bytes::get_Java_u8((address)tmp);
1 489c9b5090e2 Initial load duke parents: diff changeset	113	}
489c9b5090e2 Initial load duke parents: diff changeset	114
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	115	void ClassFileStream::skip_u1(int length, TRAPS) const {
1 489c9b5090e2 Initial load duke parents: diff changeset	116	if (_need_verify) {
489c9b5090e2 Initial load duke parents: diff changeset	117	guarantee_more(length, CHECK);
489c9b5090e2 Initial load duke parents: diff changeset	118	}
489c9b5090e2 Initial load duke parents: diff changeset	119	_current += length;
489c9b5090e2 Initial load duke parents: diff changeset	120	}
489c9b5090e2 Initial load duke parents: diff changeset	121
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	122	void ClassFileStream::skip_u2(int length, TRAPS) const {
1 489c9b5090e2 Initial load duke parents: diff changeset	123	if (_need_verify) {
489c9b5090e2 Initial load duke parents: diff changeset	124	guarantee_more(length * 2, CHECK);
489c9b5090e2 Initial load duke parents: diff changeset	125	}
489c9b5090e2 Initial load duke parents: diff changeset	126	_current += length * 2;
489c9b5090e2 Initial load duke parents: diff changeset	127	}
15102 0a86564e5f61 8004728: Add hotspot support for parameter reflection coleenp parents: 7397 diff changeset	128
34666 1c7168ea0034 8140485: Class load and creation cleanup mgronlun parents: 26419 diff changeset	129	void ClassFileStream::skip_u4(int length, TRAPS) const {
15102 0a86564e5f61 8004728: Add hotspot support for parameter reflection coleenp parents: 7397 diff changeset	130	if (_need_verify) {
0a86564e5f61 8004728: Add hotspot support for parameter reflection coleenp parents: 7397 diff changeset	131	guarantee_more(length * 4, CHECK);
0a86564e5f61 8004728: Add hotspot support for parameter reflection coleenp parents: 7397 diff changeset	132	}
0a86564e5f61 8004728: Add hotspot support for parameter reflection coleenp parents: 7397 diff changeset	133	_current += length * 4;
0a86564e5f61 8004728: Add hotspot support for parameter reflection coleenp parents: 7397 diff changeset	134	}

author	mgronlun
	Tue, 08 Dec 2015 20:04:03 +0100
changeset 34666	1c7168ea0034
parent 26419	25abc4a3285c
child 37248	11a660dbbb8e
permissions	-rw-r--r--