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src/os/solaris/vm/threadCritical_solaris.cpp@6bdd6923ba16 (annotated)

src/os/solaris/vm/threadCritical_solaris.cpp

Wed, 25 Mar 2009 14:19:20 -0400

author

coleenp

date

Wed, 25 Mar 2009 14:19:20 -0400

changeset 1091

6bdd6923ba16

parent 435

a61af66fc99e

child 1845

f03d0a26bf83

permissions

-rw-r--r--

6541756: Reduce executable C-heap
Summary: Add executable parameters to reserve_memory and commit_memory to reduce executable memory to only the Code Heap.
Reviewed-by: xlu, kvn, acorn

duke@435	1	/*
duke@435	2	* Copyright 2001-2003 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/_threadCritical_solaris.cpp.incl"
duke@435	27
duke@435	28	// OS-includes here
duke@435	29	#include <thread.h>
duke@435	30	#include <synch.h>
duke@435	31
duke@435	32	//
duke@435	33	// See threadCritical.hpp for details of this class.
duke@435	34	//
duke@435	35	// For some reason, we don't do locking until the
duke@435	36	// os::init() call completes. I'm not sure why this
duke@435	37	// is, and have left it that way for now. This should
duke@435	38	// be reviewed later.
duke@435	39
duke@435	40	static mutex_t global_mut;
duke@435	41	static thread_t global_mut_owner = -1;
duke@435	42	static int global_mut_count = 0;
duke@435	43	static bool initialized = false;
duke@435	44
duke@435	45	ThreadCritical::ThreadCritical() {
duke@435	46	if (initialized) {
duke@435	47	thread_t owner = thr_self();
duke@435	48	if (global_mut_owner != owner) {
duke@435	49	if (os::Solaris::mutex_lock(&global_mut))
duke@435	50	fatal1("ThreadCritical::ThreadCritical: mutex_lock failed (%s)", strerror(errno));
duke@435	51	assert(global_mut_count == 0, "must have clean count");
duke@435	52	assert(global_mut_owner == -1, "must have clean owner");
duke@435	53	}
duke@435	54	global_mut_owner = owner;
duke@435	55	++global_mut_count;
duke@435	56	} else {
duke@435	57	assert (Threads::number_of_threads() == 0, "valid only during initialization");
duke@435	58	}
duke@435	59	}
duke@435	60
duke@435	61	ThreadCritical::~ThreadCritical() {
duke@435	62	if (initialized) {
duke@435	63	assert(global_mut_owner == thr_self(), "must have correct owner");
duke@435	64	assert(global_mut_count > 0, "must have correct count");
duke@435	65	--global_mut_count;
duke@435	66	if (global_mut_count == 0) {
duke@435	67	global_mut_owner = -1;
duke@435	68	if (os::Solaris::mutex_unlock(&global_mut))
duke@435	69	fatal1("ThreadCritical::~ThreadCritical: mutex_unlock failed (%s)", strerror(errno));
duke@435	70	}
duke@435	71	} else {
duke@435	72	assert (Threads::number_of_threads() == 0, "valid only during initialization");
duke@435	73	}
duke@435	74	}
duke@435	75
duke@435	76	void ThreadCritical::initialize() {
duke@435	77	// This method is called at the end of os::init(). Until
duke@435	78	// then, we don't do real locking.
duke@435	79	initialized = true;
duke@435	80	}
duke@435	81
duke@435	82	void ThreadCritical::release() {
duke@435	83	}