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src/share/vm/runtime/fieldType.cpp@f90c822e73f8 (annotated)

src/share/vm/runtime/fieldType.cpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

child 6876

710a3c8b516e

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2011, 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/systemDictionary.hpp"
aoqi@0	27	#include "memory/oopFactory.hpp"
aoqi@0	28	#include "oops/oop.inline.hpp"
aoqi@0	29	#include "oops/typeArrayKlass.hpp"
aoqi@0	30	#include "runtime/fieldType.hpp"
aoqi@0	31	#include "runtime/signature.hpp"
aoqi@0	32
aoqi@0	33	void FieldType::skip_optional_size(Symbol* signature, int* index) {
aoqi@0	34	jchar c = signature->byte_at(*index);
aoqi@0	35	while (c >= '0' && c <= '9') {
aoqi@0	36	*index = *index + 1;
aoqi@0	37	c = signature->byte_at(*index);
aoqi@0	38	}
aoqi@0	39	}
aoqi@0	40
aoqi@0	41	BasicType FieldType::basic_type(Symbol* signature) {
aoqi@0	42	return char2type(signature->byte_at(0));
aoqi@0	43	}
aoqi@0	44
aoqi@0	45	// Check if it is a valid array signature
aoqi@0	46	bool FieldType::is_valid_array_signature(Symbol* sig) {
aoqi@0	47	assert(sig->utf8_length() > 1, "this should already have been checked");
aoqi@0	48	assert(sig->byte_at(0) == '[', "this should already have been checked");
aoqi@0	49	// The first character is already checked
aoqi@0	50	int i = 1;
aoqi@0	51	int len = sig->utf8_length();
aoqi@0	52	// First skip all '['s
aoqi@0	53	while(i < len - 1 && sig->byte_at(i) == '[') i++;
aoqi@0	54
aoqi@0	55	// Check type
aoqi@0	56	switch(sig->byte_at(i)) {
aoqi@0	57	case 'B': // T_BYTE
aoqi@0	58	case 'C': // T_CHAR
aoqi@0	59	case 'D': // T_DOUBLE
aoqi@0	60	case 'F': // T_FLOAT
aoqi@0	61	case 'I': // T_INT
aoqi@0	62	case 'J': // T_LONG
aoqi@0	63	case 'S': // T_SHORT
aoqi@0	64	case 'Z': // T_BOOLEAN
aoqi@0	65	// If it is an array, the type is the last character
aoqi@0	66	return (i + 1 == len);
aoqi@0	67	case 'L':
aoqi@0	68	// If it is an object, the last character must be a ';'
aoqi@0	69	return sig->byte_at(len - 1) == ';';
aoqi@0	70	}
aoqi@0	71
aoqi@0	72	return false;
aoqi@0	73	}
aoqi@0	74
aoqi@0	75
aoqi@0	76	BasicType FieldType::get_array_info(Symbol* signature, FieldArrayInfo& fd, TRAPS) {
aoqi@0	77	assert(basic_type(signature) == T_ARRAY, "must be array");
aoqi@0	78	int index = 1;
aoqi@0	79	int dim = 1;
aoqi@0	80	skip_optional_size(signature, &index);
aoqi@0	81	while (signature->byte_at(index) == '[') {
aoqi@0	82	index++;
aoqi@0	83	dim++;
aoqi@0	84	skip_optional_size(signature, &index);
aoqi@0	85	}
aoqi@0	86	ResourceMark rm;
aoqi@0	87	char *element = signature->as_C_string() + index;
aoqi@0	88	BasicType element_type = char2type(element[0]);
aoqi@0	89	if (element_type == T_OBJECT) {
aoqi@0	90	int len = (int)strlen(element);
aoqi@0	91	assert(element[len-1] == ';', "last char should be a semicolon");
aoqi@0	92	element[len-1] = '\0'; // chop off semicolon
aoqi@0	93	fd._object_key = SymbolTable::new_symbol(element + 1, CHECK_(T_BYTE));
aoqi@0	94	}
aoqi@0	95	// Pass dimension back to caller
aoqi@0	96	fd._dimension = dim;
aoqi@0	97	return element_type;
aoqi@0	98	}