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src/share/vm/prims/jvmtiUtil.hpp@f008d3631bd1 (annotated)

src/share/vm/prims/jvmtiUtil.hpp

Wed, 08 Oct 2008 08:10:51 -0700

author

ksrini

date

Wed, 08 Oct 2008 08:10:51 -0700

changeset 823

f008d3631bd1

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6755845: JVM_FindClassFromBoot triggers assertions
Summary: Fixes assertions caused by one jvm_entry calling another, solved by refactoring code and modified gamma test.
Reviewed-by: dholmes, xlu

duke@435	1	/*
duke@435	2	* Copyright 1999-2007 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	///////////////////////////////////////////////////////////////
duke@435	26	//
duke@435	27	// class JvmtiUtil
duke@435	28	//
duke@435	29	// class for miscellaneous jvmti utility static methods
duke@435	30	//
duke@435	31
duke@435	32	class JvmtiUtil : AllStatic {
duke@435	33
duke@435	34	static ResourceArea* _single_threaded_resource_area;
duke@435	35
duke@435	36	static const char* _error_names[];
duke@435	37	static const bool _event_threaded[];
duke@435	38
duke@435	39	public:
duke@435	40
duke@435	41	static ResourceArea* single_threaded_resource_area();
duke@435	42
duke@435	43	static const char* error_name(int num) { return _error_names[num]; } // To Do: add range checking
duke@435	44
duke@435	45	static const bool has_event_capability(jvmtiEvent event_type, const jvmtiCapabilities* capabilities_ptr);
duke@435	46
duke@435	47	static const bool event_threaded(int num) {
duke@435	48	if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) {
duke@435	49	return _event_threaded[num];
duke@435	50	}
duke@435	51	if (num >= EXT_MIN_EVENT_TYPE_VAL && num <= EXT_MAX_EVENT_TYPE_VAL) {
duke@435	52	return false;
duke@435	53	}
duke@435	54	ShouldNotReachHere();
duke@435	55	return false;
duke@435	56	}
duke@435	57	};
duke@435	58
duke@435	59
duke@435	60	///////////////////////////////////////////////////////////////
duke@435	61	//
duke@435	62	// class SafeResourceMark
duke@435	63	//
duke@435	64	// ResourceMarks that work before threads exist
duke@435	65	//
duke@435	66
duke@435	67	class SafeResourceMark : public ResourceMark {
duke@435	68
duke@435	69	ResourceArea* safe_resource_area() {
duke@435	70	Thread* thread;
duke@435	71
duke@435	72	if (Threads::number_of_threads() == 0) {
duke@435	73	return JvmtiUtil::single_threaded_resource_area();
duke@435	74	}
duke@435	75	thread = ThreadLocalStorage::thread();
duke@435	76	if (thread == NULL) {
duke@435	77	return JvmtiUtil::single_threaded_resource_area();
duke@435	78	}
duke@435	79	return thread->resource_area();
duke@435	80	}
duke@435	81
duke@435	82	public:
duke@435	83
duke@435	84	SafeResourceMark() : ResourceMark(safe_resource_area()) {}
duke@435	85
duke@435	86	};