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src/share/vm/runtime/unhandledOops.cpp@2a33b32dd03c (annotated)

src/share/vm/runtime/unhandledOops.cpp

Thu, 24 May 2018 19:24:53 +0800

author

aoqi

date

Thu, 24 May 2018 19:24:53 +0800

changeset 8861

2a33b32dd03c

parent 6876

710a3c8b516e

child 9448

73d689add964

permissions

-rw-r--r--

#7046 Disable the compilation when branch offset is beyond short branch
Contributed-by: fujie, aoqi

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2005, 2014, 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 "gc_interface/collectedHeap.hpp"
aoqi@0	27	#include "memory/gcLocker.inline.hpp"
aoqi@0	28	#include "memory/universe.hpp"
aoqi@0	29	#include "oops/oop.inline.hpp"
aoqi@0	30	#include "runtime/thread.hpp"
aoqi@0	31	#include "runtime/unhandledOops.hpp"
aoqi@0	32	#include "utilities/globalDefinitions.hpp"
aoqi@0	33
aoqi@0	34	PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
aoqi@0	35
aoqi@0	36	#ifdef CHECK_UNHANDLED_OOPS
aoqi@0	37	const int free_list_size = 256;
aoqi@0	38
aoqi@0	39
aoqi@0	40	UnhandledOops::UnhandledOops(Thread* thread) {
aoqi@0	41	_thread = thread;
aoqi@0	42	_oop_list = new (ResourceObj::C_HEAP, mtInternal)
aoqi@0	43	GrowableArray<UnhandledOopEntry>(free_list_size, true);
aoqi@0	44	_level = 0;
aoqi@0	45	}
aoqi@0	46
aoqi@0	47	UnhandledOops::~UnhandledOops() {
aoqi@0	48	delete _oop_list;
aoqi@0	49	}
aoqi@0	50
aoqi@0	51
aoqi@0	52	void UnhandledOops::dump_oops(UnhandledOops *list) {
aoqi@0	53	for (int k = 0; k < list->_oop_list->length(); k++) {
aoqi@0	54	UnhandledOopEntry entry = list->_oop_list->at(k);
aoqi@0	55	tty->print(" " INTPTR_FORMAT, entry._oop_ptr);
aoqi@0	56	}
aoqi@0	57	tty->cr();
aoqi@0	58	}
aoqi@0	59
aoqi@0	60	// For debugging unhandled oop detector _in the debugger_
aoqi@0	61	// You don't want to turn it on in compiled code here.
aoqi@0	62	static bool unhandled_oop_print=0;
aoqi@0	63
aoqi@0	64	void UnhandledOops::register_unhandled_oop(oop* op, address pc) {
aoqi@0	65	if (!_thread->is_in_stack((address)op))
aoqi@0	66	return;
aoqi@0	67
aoqi@0	68	_level ++;
aoqi@0	69	if (unhandled_oop_print) {
aoqi@0	70	for (int i=0; i<_level; i++) tty->print(" ");
aoqi@0	71	tty->print_cr("r " INTPTR_FORMAT, op);
aoqi@0	72	}
aoqi@0	73	UnhandledOopEntry entry(op, pc);
aoqi@0	74	_oop_list->push(entry);
aoqi@0	75	}
aoqi@0	76
aoqi@0	77
aoqi@0	78	bool match_oop_entry(void *op, UnhandledOopEntry e) {
aoqi@0	79	return (e.oop_ptr() == op);
aoqi@0	80	}
aoqi@0	81
aoqi@0	82	// Mark unhandled oop as okay for GC - the containing struct has an oops_do and
aoqi@0	83	// for some reason the oop has to be on the stack.
aoqi@0	84	// May not be called for the current thread, as in the case of
aoqi@0	85	// VM_GetOrSetLocal in jvmti.
aoqi@0	86	void UnhandledOops::allow_unhandled_oop(oop* op) {
aoqi@0	87	assert (CheckUnhandledOops, "should only be called with checking option");
aoqi@0	88
aoqi@0	89	int i = _oop_list->find_from_end(op, match_oop_entry);
aoqi@0	90	assert(i!=-1, "safe for gc oop not in unhandled_oop_list");
aoqi@0	91
aoqi@0	92	UnhandledOopEntry entry = _oop_list->at(i);
aoqi@0	93	assert(!entry._ok_for_gc, "duplicate entry");
aoqi@0	94	entry._ok_for_gc = true;
aoqi@0	95	_oop_list->at_put(i, entry);
aoqi@0	96	}
aoqi@0	97
aoqi@0	98
aoqi@0	99	// Called by the oop destructor to remove unhandled oop from the thread's
aoqi@0	100	// oop list. All oops given are assumed to be on the list. If not,
aoqi@0	101	// there's a bug in the unhandled oop detector.
aoqi@0	102	void UnhandledOops::unregister_unhandled_oop(oop* op) {
aoqi@0	103	if (!_thread->is_in_stack((address)op)) return;
aoqi@0	104
aoqi@0	105	_level --;
aoqi@0	106	if (unhandled_oop_print) {
aoqi@0	107	for (int i=0; i<_level; i++) tty->print(" ");
aoqi@0	108	tty->print_cr("u "INTPTR_FORMAT, op);
aoqi@0	109	}
aoqi@0	110
aoqi@0	111	int i = _oop_list->find_from_end(op, match_oop_entry);
aoqi@0	112	assert(i!=-1, "oop not in unhandled_oop_list");
aoqi@0	113	_oop_list->remove_at(i);
aoqi@0	114	}
aoqi@0	115
aoqi@0	116	void UnhandledOops::clear_unhandled_oops() {
aoqi@0	117	assert (CheckUnhandledOops, "should only be called with checking option");
aoqi@0	118
aoqi@0	119	for (int k = 0; k < _oop_list->length(); k++) {
aoqi@0	120	UnhandledOopEntry entry = _oop_list->at(k);
aoqi@0	121	// If an entry is on the unhandled oop list but isn't on the stack
aoqi@0	122	// anymore, it must not have gotten unregistered properly and it's a bug
aoqi@0	123	// in the unhandled oop generator.
aoqi@0	124	if(!_thread->is_in_stack((address)entry._oop_ptr)) {
aoqi@0	125	tty->print_cr("oop_ptr is " INTPTR_FORMAT, (address)entry._oop_ptr);
aoqi@0	126	tty->print_cr("thread is " INTPTR_FORMAT " from pc " INTPTR_FORMAT,
aoqi@0	127	(address)_thread, (address)entry._pc);
aoqi@0	128	assert(false, "heap is corrupted by the unhandled oop detector");
aoqi@0	129	}
aoqi@0	130	// Set unhandled oops to a pattern that will crash distinctively
aoqi@0	131	if (!entry._ok_for_gc) *(intptr_t*)(entry._oop_ptr) = BAD_OOP_ADDR;
aoqi@0	132	}
aoqi@0	133	}
aoqi@0	134	#endif // CHECK_UNHANDLED_OOPS