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src/cpu/sparc/vm/interpreterRT_sparc.hpp@e1162778c1c8 (annotated)

src/cpu/sparc/vm/interpreterRT_sparc.hpp

Thu, 07 Apr 2011 09:53:20 -0700

author

johnc

date

Thu, 07 Apr 2011 09:53:20 -0700

changeset 2781

e1162778c1c8

parent 2314

f95d63e2154a

child 6876

710a3c8b516e

permissions

-rw-r--r--

7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer.
Reviewed-by: kvn, iveresov, never, tonyp, dholmes

duke@435	1	/*
stefank@2314	2	* Copyright (c) 1998, 2010, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef CPU_SPARC_VM_INTERPRETERRT_SPARC_HPP
stefank@2314	26	#define CPU_SPARC_VM_INTERPRETERRT_SPARC_HPP
stefank@2314	27
stefank@2314	28	#include "memory/allocation.hpp"
stefank@2314	29
duke@435	30	static int binary_search(int key, LookupswitchPair* array, int n);
duke@435	31
duke@435	32	static address iload (JavaThread* thread);
duke@435	33	static address aload (JavaThread* thread);
duke@435	34	static address istore(JavaThread* thread);
duke@435	35	static address astore(JavaThread* thread);
duke@435	36	static address iinc (JavaThread* thread);
duke@435	37
duke@435	38
duke@435	39
duke@435	40	// native method calls
duke@435	41
duke@435	42	class SignatureHandlerGenerator: public NativeSignatureIterator {
duke@435	43	private:
duke@435	44	MacroAssembler* _masm;
duke@435	45
duke@435	46	void pass_word(int size_of_arg, int offset_in_arg);
duke@435	47	void pass_int() { pass_word(1, 0); }
duke@435	48	void pass_long();
duke@435	49	void pass_double();
duke@435	50	void pass_float();
duke@435	51	void pass_object();
duke@435	52
duke@435	53	public:
duke@435	54	// Creation
duke@435	55	SignatureHandlerGenerator(methodHandle method, CodeBuffer* buffer) : NativeSignatureIterator(method) {
duke@435	56	_masm = new MacroAssembler(buffer);
duke@435	57	}
duke@435	58
duke@435	59	// Code generation
duke@435	60	void generate( uint64_t fingerprint );
duke@435	61	};
stefank@2314	62
stefank@2314	63	#endif // CPU_SPARC_VM_INTERPRETERRT_SPARC_HPP