Mercurial > hg > graal-compiler
view src/share/vm/runtime/sweeper.hpp @ 12277:c1d7040a1183
8022836: JVM crashes in JVMTIENVBASE::GET_CURRENT_CONTENDED_MONITOR and GET_OWNED_MONITOR
Summary: Check that the _java_thread parameter is valid when it is possible that the JavaThread has exited after the initial checks were made in generated/jvmtifiles/jvmtiEnter.cpp: jvmti_GetCurrentContendedMonitor()
Reviewed-by: dcubed, dsamersoff
author | sgabdura |
---|---|
date | Wed, 18 Sep 2013 16:48:49 +0400 |
parents | 5888334c9c24 |
children | 510fbd28919c |
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/* * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_RUNTIME_SWEEPER_HPP #define SHARE_VM_RUNTIME_SWEEPER_HPP // An NmethodSweeper is an incremental cleaner for: // - cleanup inline caches // - reclamation of unreferences zombie nmethods // class NMethodSweeper : public AllStatic { static long _traversals; // Stack scan count, also sweep ID. static nmethod* _current; // Current nmethod static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache static int _flushed_count; // Nof. nmethods flushed in current sweep static int _zombified_count; // Nof. nmethods made zombie in current sweep static int _marked_count; // Nof. nmethods marked for reclaim in current sweep static volatile int _invocations; // No. of invocations left until we are completed with this pass static volatile int _sweep_started; // Flag to control conc sweeper //The following are reset in scan_stacks and synchronized by the safepoint static bool _resweep; // Indicates that a change has happend and we want another sweep, // always checked and reset at a safepoint so memory will be in sync. static int _locked_seen; // Number of locked nmethods encountered during the scan static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack static jint _flush_token; // token that guards method flushing, making sure it is executed only once. // These are set during a flush, a VM-operation static long _last_flush_traversal_id; // trav number at last flush unloading static jlong _last_full_flush_time; // timestamp of last emergency unloading // These are synchronized by the _sweep_started token static int _highest_marked; // highest compile id dumped at last emergency unloading static int _dead_compile_ids; // number of compile ids that where not in the cache last flush // Stat counters static int _number_of_flushes; // Total of full traversals caused by full cache static int _total_nof_methods_reclaimed; // Accumulated nof methods flushed static jlong _total_time_sweeping; // Accumulated time sweeping static jlong _total_time_this_sweep; // Total time this sweep static jlong _peak_sweep_time; // Peak time for a full sweep static jlong _peak_sweep_fraction_time; // Peak time sweeping one fraction static jlong _total_disconnect_time; // Total time cleaning code mem static jlong _peak_disconnect_time; // Peak time cleaning code mem static void process_nmethod(nmethod *nm); static void release_nmethod(nmethod* nm); static void log_sweep(const char* msg, const char* format = NULL, ...); static bool sweep_in_progress(); public: static long traversal_count() { return _traversals; } static int number_of_flushes() { return _number_of_flushes; } static int total_nof_methods_reclaimed() { return _total_nof_methods_reclaimed; } static jlong total_time_sweeping() { return _total_time_sweeping; } static jlong peak_sweep_time() { return _peak_sweep_time; } static jlong peak_sweep_fraction_time() { return _peak_sweep_fraction_time; } static jlong total_disconnect_time() { return _total_disconnect_time; } static jlong peak_disconnect_time() { return _peak_disconnect_time; } #ifdef ASSERT static bool is_sweeping(nmethod* which) { return _current == which; } // Keep track of sweeper activity in the ring buffer static void record_sweep(nmethod* nm, int line); static void report_events(int id, address entry); static void report_events(); #endif static void scan_stacks(); // Invoked at the end of each safepoint static void sweep_code_cache(); // Concurrent part of sweep job static void possibly_sweep(); // Compiler threads call this to sweep static void notify(nmethod* nm) { // Request a new sweep of the code cache from the beginning. No // need to synchronize the setting of this flag since it only // changes to false at safepoint so we can never overwrite it with false. _resweep = true; } static void handle_full_code_cache(bool is_full); // Called by compilers who fail to allocate static void speculative_disconnect_nmethods(bool was_full); // Called by vm op to deal with alloc failure }; #endif // SHARE_VM_RUNTIME_SWEEPER_HPP