• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/runtime/javaFrameAnchor.hpp@427b2fb1944f (annotated)

src/share/vm/runtime/javaFrameAnchor.hpp

Wed, 31 Jan 2018 19:24:57 -0500

author

dbuck

date

Wed, 31 Jan 2018 19:24:57 -0500

changeset 9289

427b2fb1944f

parent 6911

ce8f6bb717c9

child 7535

7ae4e26cb1e0

permissions

-rw-r--r--

8189170: Add option to disable stack overflow checking in primordial thread for use with JNI_CreateJavaJVM
Reviewed-by: dcubed

duke@435	1	/*
trims@2708	2	* Copyright (c) 2002, 2011, 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	*/
stefank@2314	24
stefank@2314	25	#ifndef SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP
stefank@2314	26	#define SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP
stefank@2314	27
stefank@2314	28	#include "utilities/globalDefinitions.hpp"
goetz@6911	29	#include "runtime/orderAccess.inline.hpp"
never@3156	30
duke@435	31	//
duke@435	32	// An object for encapsulating the machine/os dependent part of a JavaThread frame state
duke@435	33	//
duke@435	34	class JavaThread;
duke@435	35
duke@435	36	class JavaFrameAnchor VALUE_OBJ_CLASS_SPEC {
duke@435	37	// Too many friends...
duke@435	38	friend class CallNativeDirectNode;
duke@435	39	friend class OptoRuntime;
duke@435	40	friend class Runtime1;
duke@435	41	friend class StubAssembler;
duke@435	42	friend class CallRuntimeDirectNode;
duke@435	43	friend class MacroAssembler;
duke@435	44	friend class InterpreterGenerator;
duke@435	45	friend class LIR_Assembler;
duke@435	46	friend class GraphKit;
duke@435	47	friend class StubGenerator;
duke@435	48	friend class JavaThread;
duke@435	49	friend class frame;
duke@435	50	friend class VMStructs;
duke@435	51	friend class BytecodeInterpreter;
duke@435	52	friend class JavaCallWrapper;
duke@435	53
duke@435	54	private:
duke@435	55	//
duke@435	56	// Whenever _last_Java_sp != NULL other anchor fields MUST be valid!
duke@435	57	// The stack may not be walkable [check with walkable() ] but the values must be valid.
duke@435	58	// The profiler apparently depends on this.
duke@435	59	//
duke@435	60	intptr_t* volatile _last_Java_sp;
duke@435	61
duke@435	62	// Whenever we call from Java to native we can not be assured that the return
duke@435	63	// address that composes the last_Java_frame will be in an accessible location
duke@435	64	// so calls from Java to native store that pc (or one good enough to locate
duke@435	65	// the oopmap) in the frame anchor. Since the frames that call from Java to
duke@435	66	// native are never deoptimized we never need to patch the pc and so this
duke@435	67	// is acceptable.
duke@435	68	volatile address _last_Java_pc;
duke@435	69
duke@435	70	// tells whether the last Java frame is set
duke@435	71	// It is important that when last_Java_sp != NULL that the rest of the frame
duke@435	72	// anchor (including platform specific) all be valid.
duke@435	73
duke@435	74	bool has_last_Java_frame() const { return _last_Java_sp != NULL; }
duke@435	75	// This is very dangerous unless sp == NULL
duke@435	76	// Invalidate the anchor so that has_last_frame is false
duke@435	77	// and no one should look at the other fields.
duke@435	78	void zap(void) { _last_Java_sp = NULL; }
duke@435	79
stefank@2314	80	#ifdef TARGET_ARCH_x86
stefank@2314	81	# include "javaFrameAnchor_x86.hpp"
stefank@2314	82	#endif
stefank@2314	83	#ifdef TARGET_ARCH_sparc
stefank@2314	84	# include "javaFrameAnchor_sparc.hpp"
stefank@2314	85	#endif
stefank@2314	86	#ifdef TARGET_ARCH_zero
stefank@2314	87	# include "javaFrameAnchor_zero.hpp"
stefank@2314	88	#endif
bobv@2508	89	#ifdef TARGET_ARCH_arm
bobv@2508	90	# include "javaFrameAnchor_arm.hpp"
bobv@2508	91	#endif
bobv@2508	92	#ifdef TARGET_ARCH_ppc
bobv@2508	93	# include "javaFrameAnchor_ppc.hpp"
bobv@2508	94	#endif
stefank@2314	95
duke@435	96
duke@435	97	public:
duke@435	98	JavaFrameAnchor() { clear(); }
duke@435	99	JavaFrameAnchor(JavaFrameAnchor *src) { copy(src); }
duke@435	100
duke@435	101	void set_last_Java_pc(address pc) { _last_Java_pc = pc; }
duke@435	102
duke@435	103	// Assembly stub generation helpers
duke@435	104
duke@435	105	static ByteSize last_Java_sp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_sp); }
duke@435	106	static ByteSize last_Java_pc_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_pc); }
duke@435	107
duke@435	108	};
stefank@2314	109
stefank@2314	110	#endif // SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP