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src/cpu/zero/vm/vmreg_zero.cpp@f9271ff9d324 (annotated)

src/cpu/zero/vm/vmreg_zero.cpp

Thu, 15 Apr 2010 02:40:12 -0700

author

twisti

date

Thu, 15 Apr 2010 02:40:12 -0700

changeset 1814

f9271ff9d324

parent 1445

354d3184f6b2

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6941224: Improved stack overflow handling for Zero
Summary: Adding stack overflow checking to Shark brought to light a bunch of deficiencies in Zero's stack overflow code.
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>

never@1445	1	/*
never@1445	2	* Copyright 2006-2007 Sun Microsystems, Inc. All Rights Reserved.
never@1445	3	* Copyright 2007 Red Hat, Inc.
never@1445	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1445	5	*
never@1445	6	* This code is free software; you can redistribute it and/or modify it
never@1445	7	* under the terms of the GNU General Public License version 2 only, as
never@1445	8	* published by the Free Software Foundation.
never@1445	9	*
never@1445	10	* This code is distributed in the hope that it will be useful, but WITHOUT
never@1445	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1445	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@1445	13	* version 2 for more details (a copy is included in the LICENSE file that
never@1445	14	* accompanied this code).
never@1445	15	*
never@1445	16	* You should have received a copy of the GNU General Public License version
never@1445	17	* 2 along with this work; if not, write to the Free Software Foundation,
never@1445	18	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1445	19	*
never@1445	20	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
never@1445	21	* CA 95054 USA or visit www.sun.com if you need additional information or
never@1445	22	* have any questions.
never@1445	23	*
never@1445	24	*/
never@1445	25
never@1445	26	#include "incls/_precompiled.incl"
never@1445	27	#include "incls/_vmreg_zero.cpp.incl"
never@1445	28
never@1445	29	void VMRegImpl::set_regName() {
never@1445	30	int i = 0;
never@1445	31	Register reg = ::as_Register(0);
never@1445	32	for ( ; i < ConcreteRegisterImpl::max_gpr ; ) {
never@1445	33	regName[i++] = reg->name();
never@1445	34	reg = reg->successor();
never@1445	35	}
never@1445	36	FloatRegister freg = ::as_FloatRegister(0);
never@1445	37	for ( ; i < ConcreteRegisterImpl::max_fpr ; ) {
never@1445	38	regName[i++] = freg->name();
never@1445	39	freg = freg->successor();
never@1445	40	}
never@1445	41	assert(i == ConcreteRegisterImpl::number_of_registers, "fix this");
never@1445	42	}
never@1445	43
never@1445	44	bool VMRegImpl::is_Register() {
never@1445	45	return value() >= 0 &&
never@1445	46	value() < ConcreteRegisterImpl::max_gpr;
never@1445	47	}
never@1445	48
never@1445	49	bool VMRegImpl::is_FloatRegister() {
never@1445	50	return value() >= ConcreteRegisterImpl::max_gpr &&
never@1445	51	value() < ConcreteRegisterImpl::max_fpr;
never@1445	52	}
never@1445	53
never@1445	54	Register VMRegImpl::as_Register() {
never@1445	55	assert(is_Register(), "must be");
never@1445	56	return ::as_Register(value());
never@1445	57	}
never@1445	58
never@1445	59	FloatRegister VMRegImpl::as_FloatRegister() {
never@1445	60	assert(is_FloatRegister(), "must be" );
never@1445	61	return ::as_FloatRegister(value() - ConcreteRegisterImpl::max_gpr);
never@1445	62	}