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src/cpu/sparc/vm/stubRoutines_sparc.hpp@660978a2a31a (annotated)

src/cpu/sparc/vm/stubRoutines_sparc.hpp

Thu, 12 Mar 2009 10:37:46 -0700

author

kvn

date

Thu, 12 Mar 2009 10:37:46 -0700

changeset 1077

660978a2a31a

parent 435

a61af66fc99e

child 1734

9eba43136cb5

permissions

-rw-r--r--

6791178: Specialize for zero as the compressed oop vm heap base
Summary: Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb.
Reviewed-by: never, twisti, jcoomes, coleenp

duke@435	1	/*
duke@435	2	* Copyright 1997-2007 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	// This file holds the platform specific parts of the StubRoutines
duke@435	26	// definition. See stubRoutines.hpp for a description on how to
duke@435	27	// extend it.
duke@435	28
duke@435	29
duke@435	30	// So unfortunately c2 will call with a pc from a frame object
duke@435	31	// (already adjusted) and a raw pc (unadjusted), so we need to check both.
duke@435	32	// It didn't use to be like this before adapter removal.
duke@435	33	static bool returns_to_call_stub(address return_pc) {
duke@435	34	return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) ||
duke@435	35	(return_pc == _call_stub_return_address );
duke@435	36	}
duke@435	37
duke@435	38	enum /* platform_dependent_constants */ {
duke@435	39	// %%%%%%%% May be able to shrink this a lot
duke@435	40	code_size1 = 20000, // simply increase if too small (assembler will crash if too small)
duke@435	41	code_size2 = 20000 // simply increase if too small (assembler will crash if too small)
duke@435	42	};
duke@435	43
duke@435	44	class Sparc {
duke@435	45	friend class StubGenerator;
duke@435	46
duke@435	47	public:
duke@435	48	enum { nof_instance_allocators = 10 };
duke@435	49
duke@435	50	// allocator lock values
duke@435	51	enum {
duke@435	52	unlocked = 0,
duke@435	53	locked = 1
duke@435	54	};
duke@435	55
duke@435	56	enum {
duke@435	57	v8_oop_lock_ignore_bits = 2,
duke@435	58	v8_oop_lock_bits = 4,
duke@435	59	nof_v8_oop_lock_cache_entries = 1 << (v8_oop_lock_bits+v8_oop_lock_ignore_bits),
duke@435	60	v8_oop_lock_mask = right_n_bits(v8_oop_lock_bits),
duke@435	61	v8_oop_lock_mask_in_place = v8_oop_lock_mask << v8_oop_lock_ignore_bits
duke@435	62	};
duke@435	63
duke@435	64	static int _v8_oop_lock_cache[nof_v8_oop_lock_cache_entries];
duke@435	65
duke@435	66	private:
duke@435	67	static address _test_stop_entry;
duke@435	68	static address _stop_subroutine_entry;
duke@435	69	static address _flush_callers_register_windows_entry;
duke@435	70
duke@435	71	static int _atomic_memory_operation_lock;
duke@435	72
duke@435	73	static address _partial_subtype_check;
duke@435	74
duke@435	75	public:
duke@435	76	// %%% global lock for everyone who needs to use atomic_compare_and_exchange
duke@435	77	// %%% or atomic_increment -- should probably use more locks for more
duke@435	78	// %%% scalability-- for instance one for each eden space or group of
duke@435	79
duke@435	80	// address of the lock for atomic_compare_and_exchange
duke@435	81	static int* atomic_memory_operation_lock_addr() { return &_atomic_memory_operation_lock; }
duke@435	82
duke@435	83	// accessor and mutator for _atomic_memory_operation_lock
duke@435	84	static int atomic_memory_operation_lock() { return _atomic_memory_operation_lock; }
duke@435	85	static void set_atomic_memory_operation_lock(int value) { _atomic_memory_operation_lock = value; }
duke@435	86
duke@435	87	// test assembler stop routine by setting registers
duke@435	88	static void (*test_stop_entry()) () { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); }
duke@435	89
duke@435	90	// a subroutine for debugging assembler code
duke@435	91	static address stop_subroutine_entry_address() { return (address)&_stop_subroutine_entry; }
duke@435	92
duke@435	93	// flushes (all but current) register window
duke@435	94	static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); }
duke@435	95
duke@435	96	static address partial_subtype_check() { return _partial_subtype_check; }
duke@435	97	};