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comparison src/share/vm/runtime/mutex.cpp @ 4872:aa3d708d67c4

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7141200: log some interesting information in ring buffers for crashes Reviewed-by: kvn, jrose, kevinw, brutisso, twisti, jmasa
author never
date Wed, 01 Feb 2012 07:59:01 -0800
parents eccc4b1f8945
children f34d701e952e
comparison
equal deleted inserted replaced
4871:f067b4e0e04b 4872:aa3d708d67c4
1 1
2 /* 2 /*
3 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 * 5 *
6 * This code is free software; you can redistribute it and/or modify it 6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as 7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation. 8 * published by the Free Software Foundation.
1294 Monitor* locks = get_least_ranked_lock(new_owner->owned_locks()); 1294 Monitor* locks = get_least_ranked_lock(new_owner->owned_locks());
1295 // Mutex::set_owner_implementation is a friend of Thread 1295 // Mutex::set_owner_implementation is a friend of Thread
1296 1296
1297 assert(this->rank() >= 0, "bad lock rank"); 1297 assert(this->rank() >= 0, "bad lock rank");
1298 1298
1299 if (LogMultipleMutexLocking && locks != NULL) {
1300 Events::log("thread " INTPTR_FORMAT " locks %s, already owns %s", new_owner, name(), locks->name());
1301 }
1302
1303 // Deadlock avoidance rules require us to acquire Mutexes only in 1299 // Deadlock avoidance rules require us to acquire Mutexes only in
1304 // a global total order. For example m1 is the lowest ranked mutex 1300 // a global total order. For example m1 is the lowest ranked mutex
1305 // that the thread holds and m2 is the mutex the thread is trying 1301 // that the thread holds and m2 is the mutex the thread is trying
1306 // to acquire, then deadlock avoidance rules require that the rank 1302 // to acquire, then deadlock avoidance rules require that the rank
1307 // of m2 be less than the rank of m1. 1303 // of m2 be less than the rank of m1.
1341 _owner = NULL; // set the owner 1337 _owner = NULL; // set the owner
1342 1338
1343 #ifdef ASSERT 1339 #ifdef ASSERT
1344 Monitor *locks = old_owner->owned_locks(); 1340 Monitor *locks = old_owner->owned_locks();
1345 1341
1346 if (LogMultipleMutexLocking && locks != this) {
1347 Events::log("thread " INTPTR_FORMAT " unlocks %s, still owns %s", old_owner, this->name(), locks->name());
1348 }
1349
1350 // remove "this" from the owned locks list 1342 // remove "this" from the owned locks list
1351 1343
1352 Monitor *prev = NULL; 1344 Monitor *prev = NULL;
1353 bool found = false; 1345 bool found = false;
1354 for (; locks != NULL; prev = locks, locks = locks->next()) { 1346 for (; locks != NULL; prev = locks, locks = locks->next()) {