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src/share/vm/oops/constMethodOop.cpp@cd5dbf694d45 (annotated)

src/share/vm/oops/constMethodOop.cpp

Sat, 01 May 2010 02:42:18 -0700

author

jrose

date

Sat, 01 May 2010 02:42:18 -0700

changeset 1862

cd5dbf694d45

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6939134: JSR 292 adjustments to method handle invocation
Summary: split MethodHandle.invoke into invokeExact and invokeGeneric; also clean up JVM-to-Java interfaces
Reviewed-by: twisti

duke@435	1	/*
duke@435	2	* Copyright 2003-2006 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	# include "incls/_precompiled.incl"
duke@435	26	# include "incls/_constMethodOop.cpp.incl"
duke@435	27
duke@435	28	// Static initialization
duke@435	29	const u2 constMethodOopDesc::MAX_IDNUM = 0xFFFE;
duke@435	30	const u2 constMethodOopDesc::UNSET_IDNUM = 0xFFFF;
duke@435	31
duke@435	32	// How big must this constMethodObject be?
duke@435	33
duke@435	34	int constMethodOopDesc::object_size(int code_size,
duke@435	35	int compressed_line_number_size,
duke@435	36	int local_variable_table_length,
duke@435	37	int checked_exceptions_length) {
duke@435	38	int extra_bytes = code_size;
duke@435	39	if (compressed_line_number_size > 0) {
duke@435	40	extra_bytes += compressed_line_number_size;
duke@435	41	}
duke@435	42	if (checked_exceptions_length > 0) {
duke@435	43	extra_bytes += sizeof(u2);
duke@435	44	extra_bytes += checked_exceptions_length * sizeof(CheckedExceptionElement);
duke@435	45	}
duke@435	46	if (local_variable_table_length > 0) {
duke@435	47	extra_bytes += sizeof(u2);
duke@435	48	extra_bytes +=
duke@435	49	local_variable_table_length * sizeof(LocalVariableTableElement);
duke@435	50	}
duke@435	51	int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord;
duke@435	52	return align_object_size(header_size() + extra_words);
duke@435	53	}
duke@435	54
duke@435	55
duke@435	56	// linenumber table - note that length is unknown until decompression,
duke@435	57	// see class CompressedLineNumberReadStream.
duke@435	58
duke@435	59	u_char* constMethodOopDesc::compressed_linenumber_table() const {
duke@435	60	// Located immediately following the bytecodes.
duke@435	61	assert(has_linenumber_table(), "called only if table is present");
duke@435	62	return code_end();
duke@435	63	}
duke@435	64
duke@435	65	u2* constMethodOopDesc::checked_exceptions_length_addr() const {
duke@435	66	// Located at the end of the constMethod.
duke@435	67	assert(has_checked_exceptions(), "called only if table is present");
duke@435	68	return last_u2_element();
duke@435	69	}
duke@435	70
duke@435	71	u2* constMethodOopDesc::localvariable_table_length_addr() const {
duke@435	72	assert(has_localvariable_table(), "called only if table is present");
duke@435	73	if (has_checked_exceptions()) {
duke@435	74	// If checked_exception present, locate immediately before them.
duke@435	75	return (u2*) checked_exceptions_start() - 1;
duke@435	76	} else {
duke@435	77	// Else, the linenumber table is at the end of the constMethod.
duke@435	78	return last_u2_element();
duke@435	79	}
duke@435	80	}
duke@435	81
duke@435	82
duke@435	83	// Update the flags to indicate the presence of these optional fields.
duke@435	84	void constMethodOopDesc::set_inlined_tables_length(
duke@435	85	int checked_exceptions_len,
duke@435	86	int compressed_line_number_size,
duke@435	87	int localvariable_table_len) {
duke@435	88	// Must be done in the order below, otherwise length_addr accessors
duke@435	89	// will not work. Only set bit in header if length is positive.
duke@435	90	assert(_flags == 0, "Error");
duke@435	91	if (compressed_line_number_size > 0) {
duke@435	92	_flags |= _has_linenumber_table;
duke@435	93	}
duke@435	94	if (checked_exceptions_len > 0) {
duke@435	95	_flags |= _has_checked_exceptions;
duke@435	96	*(checked_exceptions_length_addr()) = checked_exceptions_len;
duke@435	97	}
duke@435	98	if (localvariable_table_len > 0) {
duke@435	99	_flags |= _has_localvariable_table;
duke@435	100	*(localvariable_table_length_addr()) = localvariable_table_len;
duke@435	101	}
duke@435	102	}
duke@435	103
duke@435	104
duke@435	105	int constMethodOopDesc::checked_exceptions_length() const {
duke@435	106	return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0;
duke@435	107	}
duke@435	108
duke@435	109
duke@435	110	CheckedExceptionElement* constMethodOopDesc::checked_exceptions_start() const {
duke@435	111	u2* addr = checked_exceptions_length_addr();
duke@435	112	u2 length = *addr;
duke@435	113	assert(length > 0, "should only be called if table is present");
duke@435	114	addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2);
duke@435	115	return (CheckedExceptionElement*) addr;
duke@435	116	}
duke@435	117
duke@435	118
duke@435	119	int constMethodOopDesc::localvariable_table_length() const {
duke@435	120	return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0;
duke@435	121	}
duke@435	122
duke@435	123
duke@435	124	LocalVariableTableElement* constMethodOopDesc::localvariable_table_start() const {
duke@435	125	u2* addr = localvariable_table_length_addr();
duke@435	126	u2 length = *addr;
duke@435	127	assert(length > 0, "should only be called if table is present");
duke@435	128	addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2);
duke@435	129	return (LocalVariableTableElement*) addr;
duke@435	130	}