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src/os/windows/vm/jvm_windows.cpp@f90c822e73f8 (annotated)

src/os/windows/vm/jvm_windows.cpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

child 6876

710a3c8b516e

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26	#include "prims/jvm.h"
aoqi@0	27	#include "runtime/interfaceSupport.hpp"
aoqi@0	28	#include "runtime/osThread.hpp"
aoqi@0	29
aoqi@0	30	#include <signal.h>
aoqi@0	31
aoqi@0	32	JVM_LEAF(void*, JVM_GetThreadInterruptEvent())
aoqi@0	33	return Thread::current()->osthread()->interrupt_event();
aoqi@0	34	JVM_END
aoqi@0	35
aoqi@0	36	// sun.misc.Signal ///////////////////////////////////////////////////////////
aoqi@0	37	// Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23
aoqi@0	38	/*
aoqi@0	39	* This function is included primarily as a debugging aid. If Java is
aoqi@0	40	* running in a console window, then pressing <CTRL-BREAK> will cause
aoqi@0	41	* the current state of all active threads and monitors to be written
aoqi@0	42	* to the console window.
aoqi@0	43	*/
aoqi@0	44
aoqi@0	45	JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler))
aoqi@0	46	// Copied from classic vm
aoqi@0	47	// signals_md.c 1.4 98/08/23
aoqi@0	48	void* newHandler = handler == (void *)2
aoqi@0	49	? os::user_handler()
aoqi@0	50	: handler;
aoqi@0	51	switch (sig) {
aoqi@0	52	case SIGFPE:
aoqi@0	53	return (void *)-1; /* already used by VM */
aoqi@0	54	case SIGBREAK:
aoqi@0	55	if (!ReduceSignalUsage) return (void *)-1;
aoqi@0	56
aoqi@0	57	/* The following signals are used for Shutdown Hooks support. However, if
aoqi@0	58	ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via
aoqi@0	59	System.exit(), Java is not allowed to use these signals, and the the
aoqi@0	60	user is allowed to set his own _native_ handler for these signals and
aoqi@0	61	invoke System.exit() as needed. Terminator.setup() is avoiding
aoqi@0	62	registration of these signals when -Xrs is present. */
aoqi@0	63	case SHUTDOWN1_SIGNAL:
aoqi@0	64	case SHUTDOWN2_SIGNAL:
aoqi@0	65	if (ReduceSignalUsage) return (void*)-1;
aoqi@0	66	}
aoqi@0	67
aoqi@0	68	void* oldHandler = os::signal(sig, newHandler);
aoqi@0	69	if (oldHandler == os::user_handler()) {
aoqi@0	70	return (void *)2;
aoqi@0	71	} else {
aoqi@0	72	return oldHandler;
aoqi@0	73	}
aoqi@0	74	JVM_END
aoqi@0	75
aoqi@0	76
aoqi@0	77	JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig))
aoqi@0	78	if (ReduceSignalUsage) {
aoqi@0	79	// do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,BREAK_SIGNAL
aoqi@0	80	// to be raised when ReduceSignalUsage is set, since no handler
aoqi@0	81	// for them is actually registered in JVM or via JVM_RegisterSignal.
aoqi@0	82	if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
aoqi@0	83	sig == SIGBREAK) {
aoqi@0	84	return JNI_FALSE;
aoqi@0	85	}
aoqi@0	86	}
aoqi@0	87	os::signal_raise(sig);
aoqi@0	88	return JNI_TRUE;
aoqi@0	89	JVM_END
aoqi@0	90
aoqi@0	91
aoqi@0	92	/*
aoqi@0	93	All the defined signal names for Windows.
aoqi@0	94
aoqi@0	95	NOTE that not all of these names are accepted by FindSignal!
aoqi@0	96
aoqi@0	97	For various reasons some of these may be rejected at runtime.
aoqi@0	98
aoqi@0	99	Here are the names currently accepted by a user of sun.misc.Signal with
aoqi@0	100	1.4.1 (ignoring potential interaction with use of chaining, etc):
aoqi@0	101
aoqi@0	102	(LIST TBD)
aoqi@0	103
aoqi@0	104	*/
aoqi@0	105	struct siglabel {
aoqi@0	106	char *name;
aoqi@0	107	int number;
aoqi@0	108	};
aoqi@0	109
aoqi@0	110	struct siglabel siglabels[] =
aoqi@0	111	/* derived from version 6.0 VC98/include/signal.h */
aoqi@0	112	{"ABRT", SIGABRT, /* abnormal termination triggered by abort cl */
aoqi@0	113	"FPE", SIGFPE, /* floating point exception */
aoqi@0	114	"SEGV", SIGSEGV, /* segment violation */
aoqi@0	115	"INT", SIGINT, /* interrupt */
aoqi@0	116	"TERM", SIGTERM, /* software term signal from kill */
aoqi@0	117	"BREAK", SIGBREAK, /* Ctrl-Break sequence */
aoqi@0	118	"ILL", SIGILL}; /* illegal instruction */
aoqi@0	119
aoqi@0	120	JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
aoqi@0	121	/* find and return the named signal's number */
aoqi@0	122
aoqi@0	123	for(int i=0;i<sizeof(siglabels)/sizeof(struct siglabel);i++)
aoqi@0	124	if(!strcmp(name, siglabels[i].name))
aoqi@0	125	return siglabels[i].number;
aoqi@0	126	return -1;
aoqi@0	127	JVM_END