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src/cpu/zero/vm/assembler_zero.hpp@f9271ff9d324 (annotated)

src/cpu/zero/vm/assembler_zero.hpp

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 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
never@1445	3	* Copyright 2007, 2008, 2009 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	// In normal, CPU-specific ports of HotSpot these two classes are used
never@1445	27	// for generating assembly language. We don't do any of this in zero,
never@1445	28	// of course, but we do sneak entry points around in CodeBuffers so we
never@1445	29	// generate those here.
never@1445	30
never@1445	31	class Assembler : public AbstractAssembler {
never@1445	32	public:
never@1445	33	Assembler(CodeBuffer* code) : AbstractAssembler(code) {}
never@1445	34
never@1445	35	public:
never@1445	36	void pd_patch_instruction(address branch, address target);
never@1445	37	#ifndef PRODUCT
never@1445	38	static void pd_print_patched_instruction(address branch);
never@1445	39	#endif // PRODUCT
never@1445	40	};
never@1445	41
never@1445	42	class MacroAssembler : public Assembler {
never@1445	43	public:
never@1445	44	MacroAssembler(CodeBuffer* code) : Assembler(code) {}
never@1445	45
never@1445	46	public:
never@1445	47	void align(int modulus);
never@1445	48	void bang_stack_with_offset(int offset);
never@1445	49	bool needs_explicit_null_check(intptr_t offset);
never@1445	50	RegisterOrConstant delayed_value_impl(intptr_t* delayed_value_addr,
never@1445	51	Register tmp, int offset);
never@1445	52	public:
never@1445	53	void advance(int bytes);
never@1445	54	void store_oop(jobject obj);
never@1445	55	};
never@1445	56
never@1445	57	#ifdef ASSERT
never@1445	58	inline bool AbstractAssembler::pd_check_instruction_mark() {
never@1445	59	ShouldNotCallThis();
never@1445	60	}
never@1445	61	#endif
never@1445	62
never@1445	63	address ShouldNotCallThisStub();
never@1445	64	address ShouldNotCallThisEntry();