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src/cpu/zero/vm/nativeInst_zero.cpp@b6f06e395428 (annotated)

src/cpu/zero/vm/nativeInst_zero.cpp

Tue, 05 Jan 2010 11:14:54 -0800

author

never

date

Tue, 05 Jan 2010 11:14:54 -0800

changeset 1574

b6f06e395428

parent 1445

354d3184f6b2

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6908267: Zero fails to unlock synchronized native methods on exception
Reviewed-by: never
Contributed-by: Gary Benson <gbenson@redhat.com>

never@1445	1	/*
never@1445	2	* Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
never@1445	3	* Copyright 2008 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/_nativeInst_zero.cpp.incl"
never@1445	28
never@1445	29	// This method is called by nmethod::make_not_entrant_or_zombie to
never@1445	30	// insert a jump to SharedRuntime::get_handle_wrong_method_stub()
never@1445	31	// (dest) at the start of a compiled method (verified_entry) to avoid
never@1445	32	// a race where a method is invoked while being made non-entrant.
never@1445	33	//
never@1445	34	// In Shark, verified_entry is a pointer to a SharkEntry. We can
never@1445	35	// handle this simply by changing it's entry point to point at the
never@1445	36	// interpreter. This only works because the interpreter and Shark
never@1445	37	// calling conventions are the same.
never@1445	38
never@1445	39	void NativeJump::patch_verified_entry(address entry,
never@1445	40	address verified_entry,
never@1445	41	address dest) {
never@1445	42	assert(dest == SharedRuntime::get_handle_wrong_method_stub(), "should be");
never@1445	43
never@1445	44	#ifdef CC_INTERP
never@1445	45	((ZeroEntry*) verified_entry)->set_entry_point(
never@1445	46	(address) CppInterpreter::normal_entry);
never@1445	47	#else
never@1445	48	Unimplemented();
never@1445	49	#endif // CC_INTERP
never@1445	50	}