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src/share/vm/interpreter/bytecodeStream.cpp@feeb96a45707 (annotated)

src/share/vm/interpreter/bytecodeStream.cpp

Wed, 28 May 2008 21:06:24 -0700

author

coleenp

date

Wed, 28 May 2008 21:06:24 -0700

changeset 602

feeb96a45707

parent 435

a61af66fc99e

child 848

c7ec737733a6

permissions

-rw-r--r--

6696264: assert("narrow oop can never be zero") for GCBasher & ParNewGC
Summary: decouple set_klass() with zeroing the gap when compressed.
Reviewed-by: kvn, ysr, jrose

duke@435	1	/*
duke@435	2	* Copyright 1997-2005 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/_bytecodeStream.cpp.incl"
duke@435	27
duke@435	28	Bytecodes::Code RawBytecodeStream::raw_next_special(Bytecodes::Code code) {
duke@435	29	assert(!is_last_bytecode(), "should have been checked");
duke@435	30	// set next bytecode position
duke@435	31	address bcp = RawBytecodeStream::bcp();
duke@435	32	int l = Bytecodes::raw_special_length_at(bcp);
duke@435	33	if (l <= 0 || (_bci + l) > _end_bci) {
duke@435	34	code = Bytecodes::_illegal;
duke@435	35	} else {
duke@435	36	_next_bci += l;
duke@435	37	assert(_bci < _next_bci, "length must be > 0");
duke@435	38	// set attributes
duke@435	39	_is_wide = false;
duke@435	40	// check for special (uncommon) cases
duke@435	41	if (code == Bytecodes::_wide) {
duke@435	42	code = (Bytecodes::Code)bcp[1];
duke@435	43	_is_wide = true;
duke@435	44	}
duke@435	45	}
duke@435	46	_code = code;
duke@435	47	return code;
duke@435	48	}