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src/os/windows/vm/jvm_windows.cpp@a61af66fc99e (annotated)

src/os/windows/vm/jvm_windows.cpp

Sat, 01 Dec 2007 00:00:00 +0000

author

duke

date

Sat, 01 Dec 2007 00:00:00 +0000

changeset 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

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duke@435	1	/*
duke@435	2	* Copyright 1998-2007 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	#include "incls/_precompiled.incl"
duke@435	26	#include "incls/_jvm_windows.cpp.incl"
duke@435	27
duke@435	28	#include <signal.h>
duke@435	29
duke@435	30	JVM_LEAF(void*, JVM_GetThreadInterruptEvent())
duke@435	31	return Thread::current()->osthread()->interrupt_event();
duke@435	32	JVM_END
duke@435	33
duke@435	34	// sun.misc.Signal ///////////////////////////////////////////////////////////
duke@435	35	// Signal code is mostly copied from classic vm, signals_md.c 1.4 98/08/23
duke@435	36	/*
duke@435	37	* This function is included primarily as a debugging aid. If Java is
duke@435	38	* running in a console window, then pressing <CTRL-BREAK> will cause
duke@435	39	* the current state of all active threads and monitors to be written
duke@435	40	* to the console window.
duke@435	41	*/
duke@435	42
duke@435	43	JVM_ENTRY_NO_ENV(void*, JVM_RegisterSignal(jint sig, void* handler))
duke@435	44	// Copied from classic vm
duke@435	45	// signals_md.c 1.4 98/08/23
duke@435	46	void* newHandler = handler == (void *)2
duke@435	47	? os::user_handler()
duke@435	48	: handler;
duke@435	49	switch (sig) {
duke@435	50	case SIGFPE:
duke@435	51	return (void *)-1; /* already used by VM */
duke@435	52	case SIGBREAK:
duke@435	53	if (!ReduceSignalUsage) return (void *)-1;
duke@435	54
duke@435	55	/* The following signals are used for Shutdown Hooks support. However, if
duke@435	56	ReduceSignalUsage (-Xrs) is set, Shutdown Hooks must be invoked via
duke@435	57	System.exit(), Java is not allowed to use these signals, and the the
duke@435	58	user is allowed to set his own _native_ handler for these signals and
duke@435	59	invoke System.exit() as needed. Terminator.setup() is avoiding
duke@435	60	registration of these signals when -Xrs is present. */
duke@435	61	case SHUTDOWN1_SIGNAL:
duke@435	62	case SHUTDOWN2_SIGNAL:
duke@435	63	if (ReduceSignalUsage) return (void*)-1;
duke@435	64	}
duke@435	65
duke@435	66	void* oldHandler = os::signal(sig, newHandler);
duke@435	67	if (oldHandler == os::user_handler()) {
duke@435	68	return (void *)2;
duke@435	69	} else {
duke@435	70	return oldHandler;
duke@435	71	}
duke@435	72	JVM_END
duke@435	73
duke@435	74
duke@435	75	JVM_ENTRY_NO_ENV(jboolean, JVM_RaiseSignal(jint sig))
duke@435	76	if (ReduceSignalUsage) {
duke@435	77	// do not allow SHUTDOWN1_SIGNAL,SHUTDOWN2_SIGNAL,BREAK_SIGNAL
duke@435	78	// to be raised when ReduceSignalUsage is set, since no handler
duke@435	79	// for them is actually registered in JVM or via JVM_RegisterSignal.
duke@435	80	if (sig == SHUTDOWN1_SIGNAL || sig == SHUTDOWN2_SIGNAL ||
duke@435	81	sig == SIGBREAK) {
duke@435	82	return JNI_FALSE;
duke@435	83	}
duke@435	84	}
duke@435	85	os::signal_raise(sig);
duke@435	86	return JNI_TRUE;
duke@435	87	JVM_END
duke@435	88
duke@435	89
duke@435	90	/*
duke@435	91	All the defined signal names for Windows.
duke@435	92
duke@435	93	NOTE that not all of these names are accepted by FindSignal!
duke@435	94
duke@435	95	For various reasons some of these may be rejected at runtime.
duke@435	96
duke@435	97	Here are the names currently accepted by a user of sun.misc.Signal with
duke@435	98	1.4.1 (ignoring potential interaction with use of chaining, etc):
duke@435	99
duke@435	100	(LIST TBD)
duke@435	101
duke@435	102	*/
duke@435	103	struct siglabel {
duke@435	104	char *name;
duke@435	105	int number;
duke@435	106	};
duke@435	107
duke@435	108	struct siglabel siglabels[] =
duke@435	109	/* derived from version 6.0 VC98/include/signal.h */
duke@435	110	{"ABRT", SIGABRT, /* abnormal termination triggered by abort cl */
duke@435	111	"FPE", SIGFPE, /* floating point exception */
duke@435	112	"SEGV", SIGSEGV, /* segment violation */
duke@435	113	"INT", SIGINT, /* interrupt */
duke@435	114	"TERM", SIGTERM, /* software term signal from kill */
duke@435	115	"BREAK", SIGBREAK, /* Ctrl-Break sequence */
duke@435	116	"ILL", SIGILL}; /* illegal instruction */
duke@435	117
duke@435	118	JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
duke@435	119	/* find and return the named signal's number */
duke@435	120
duke@435	121	for(int i=0;i<sizeof(siglabels)/sizeof(struct siglabel);i++)
duke@435	122	if(!strcmp(name, siglabels[i].name))
duke@435	123	return siglabels[i].number;
duke@435	124	return -1;
duke@435	125	JVM_END