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src/share/vm/oops/constMethodOop.cpp@b92c45f2bc75 (annotated)

src/share/vm/oops/constMethodOop.cpp

Wed, 02 Feb 2011 11:35:26 -0500

author

bobv

date

Wed, 02 Feb 2011 11:35:26 -0500

changeset 2508

b92c45f2bc75

parent 2314

f95d63e2154a

child 3826

2fe087c3e814

permissions

-rw-r--r--

7016023: Enable building ARM and PPC from src/closed repository
Reviewed-by: dholmes, bdelsart

duke@435	1	/*
stefank@2314	2	* Copyright (c) 2003, 2010, 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 "oops/constMethodOop.hpp"
stefank@2314	27	#include "oops/methodOop.hpp"
duke@435	28
duke@435	29	// Static initialization
duke@435	30	const u2 constMethodOopDesc::MAX_IDNUM = 0xFFFE;
duke@435	31	const u2 constMethodOopDesc::UNSET_IDNUM = 0xFFFF;
duke@435	32
duke@435	33	// How big must this constMethodObject be?
duke@435	34
duke@435	35	int constMethodOopDesc::object_size(int code_size,
duke@435	36	int compressed_line_number_size,
duke@435	37	int local_variable_table_length,
duke@435	38	int checked_exceptions_length) {
duke@435	39	int extra_bytes = code_size;
duke@435	40	if (compressed_line_number_size > 0) {
duke@435	41	extra_bytes += compressed_line_number_size;
duke@435	42	}
duke@435	43	if (checked_exceptions_length > 0) {
duke@435	44	extra_bytes += sizeof(u2);
duke@435	45	extra_bytes += checked_exceptions_length * sizeof(CheckedExceptionElement);
duke@435	46	}
duke@435	47	if (local_variable_table_length > 0) {
duke@435	48	extra_bytes += sizeof(u2);
duke@435	49	extra_bytes +=
duke@435	50	local_variable_table_length * sizeof(LocalVariableTableElement);
duke@435	51	}
duke@435	52	int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord;
duke@435	53	return align_object_size(header_size() + extra_words);
duke@435	54	}
duke@435	55
duke@435	56
duke@435	57	// linenumber table - note that length is unknown until decompression,
duke@435	58	// see class CompressedLineNumberReadStream.
duke@435	59
duke@435	60	u_char* constMethodOopDesc::compressed_linenumber_table() const {
duke@435	61	// Located immediately following the bytecodes.
duke@435	62	assert(has_linenumber_table(), "called only if table is present");
duke@435	63	return code_end();
duke@435	64	}
duke@435	65
duke@435	66	u2* constMethodOopDesc::checked_exceptions_length_addr() const {
duke@435	67	// Located at the end of the constMethod.
duke@435	68	assert(has_checked_exceptions(), "called only if table is present");
duke@435	69	return last_u2_element();
duke@435	70	}
duke@435	71
duke@435	72	u2* constMethodOopDesc::localvariable_table_length_addr() const {
duke@435	73	assert(has_localvariable_table(), "called only if table is present");
duke@435	74	if (has_checked_exceptions()) {
duke@435	75	// If checked_exception present, locate immediately before them.
duke@435	76	return (u2*) checked_exceptions_start() - 1;
duke@435	77	} else {
duke@435	78	// Else, the linenumber table is at the end of the constMethod.
duke@435	79	return last_u2_element();
duke@435	80	}
duke@435	81	}
duke@435	82
duke@435	83
duke@435	84	// Update the flags to indicate the presence of these optional fields.
duke@435	85	void constMethodOopDesc::set_inlined_tables_length(
duke@435	86	int checked_exceptions_len,
duke@435	87	int compressed_line_number_size,
duke@435	88	int localvariable_table_len) {
duke@435	89	// Must be done in the order below, otherwise length_addr accessors
duke@435	90	// will not work. Only set bit in header if length is positive.
duke@435	91	assert(_flags == 0, "Error");
duke@435	92	if (compressed_line_number_size > 0) {
duke@435	93	_flags |= _has_linenumber_table;
duke@435	94	}
duke@435	95	if (checked_exceptions_len > 0) {
duke@435	96	_flags |= _has_checked_exceptions;
duke@435	97	*(checked_exceptions_length_addr()) = checked_exceptions_len;
duke@435	98	}
duke@435	99	if (localvariable_table_len > 0) {
duke@435	100	_flags |= _has_localvariable_table;
duke@435	101	*(localvariable_table_length_addr()) = localvariable_table_len;
duke@435	102	}
duke@435	103	}
duke@435	104
duke@435	105
duke@435	106	int constMethodOopDesc::checked_exceptions_length() const {
duke@435	107	return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0;
duke@435	108	}
duke@435	109
duke@435	110
duke@435	111	CheckedExceptionElement* constMethodOopDesc::checked_exceptions_start() const {
duke@435	112	u2* addr = checked_exceptions_length_addr();
duke@435	113	u2 length = *addr;
duke@435	114	assert(length > 0, "should only be called if table is present");
duke@435	115	addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2);
duke@435	116	return (CheckedExceptionElement*) addr;
duke@435	117	}
duke@435	118
duke@435	119
duke@435	120	int constMethodOopDesc::localvariable_table_length() const {
duke@435	121	return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0;
duke@435	122	}
duke@435	123
duke@435	124
duke@435	125	LocalVariableTableElement* constMethodOopDesc::localvariable_table_start() const {
duke@435	126	u2* addr = localvariable_table_length_addr();
duke@435	127	u2 length = *addr;
duke@435	128	assert(length > 0, "should only be called if table is present");
duke@435	129	addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2);
duke@435	130	return (LocalVariableTableElement*) addr;
duke@435	131	}