--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/mutexLocker.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,266 @@
+/*
+ * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_mutexLocker.cpp.incl"
+
+// Mutexes used in the VM (see comment in mutexLocker.hpp):
+//
+// Note that the following pointers are effectively final -- after having been
+// set at JVM startup-time, they should never be subsequently mutated.
+// Instead of using pointers to malloc()ed monitors and mutexes we should consider
+// eliminating the indirection and using instances instead.
+// Consider using GCC's __read_mostly.
+
+Mutex* Patching_lock = NULL;
+Monitor* SystemDictionary_lock = NULL;
+Mutex* PackageTable_lock = NULL;
+Mutex* CompiledIC_lock = NULL;
+Mutex* InlineCacheBuffer_lock = NULL;
+Mutex* VMStatistic_lock = NULL;
+Mutex* JNIGlobalHandle_lock = NULL;
+Mutex* JNIHandleBlockFreeList_lock = NULL;
+Mutex* JNICachedItableIndex_lock = NULL;
+Mutex* JmethodIdCreation_lock = NULL;
+Mutex* JfieldIdCreation_lock = NULL;
+Monitor* JNICritical_lock = NULL;
+Mutex* JvmtiThreadState_lock = NULL;
+Monitor* JvmtiPendingEvent_lock = NULL;
+Mutex* Heap_lock = NULL;
+Mutex* ExpandHeap_lock = NULL;
+Mutex* AdapterHandlerLibrary_lock = NULL;
+Mutex* SignatureHandlerLibrary_lock = NULL;
+Mutex* VtableStubs_lock = NULL;
+Mutex* SymbolTable_lock = NULL;
+Mutex* StringTable_lock = NULL;
+Mutex* CodeCache_lock = NULL;
+Mutex* MethodData_lock = NULL;
+Mutex* RetData_lock = NULL;
+Monitor* VMOperationQueue_lock = NULL;
+Monitor* VMOperationRequest_lock = NULL;
+Monitor* Safepoint_lock = NULL;
+Monitor* SerializePage_lock = NULL;
+Monitor* Threads_lock = NULL;
+Monitor* CGC_lock = NULL;
+Mutex* STS_init_lock = NULL;
+Monitor* SLT_lock = NULL;
+Monitor* iCMS_lock = NULL;
+Monitor* FullGCCount_lock = NULL;
+Mutex* ParGCRareEvent_lock = NULL;
+Mutex* DerivedPointerTableGC_lock = NULL;
+Mutex* Compile_lock = NULL;
+Monitor* MethodCompileQueue_lock = NULL;
+#ifdef TIERED
+Monitor* C1_lock = NULL;
+#endif // TIERED
+Monitor* CompileThread_lock = NULL;
+Mutex* CompileTaskAlloc_lock = NULL;
+Mutex* CompileStatistics_lock = NULL;
+Mutex* MultiArray_lock = NULL;
+Monitor* Terminator_lock = NULL;
+Monitor* BeforeExit_lock = NULL;
+Monitor* Notify_lock = NULL;
+Monitor* Interrupt_lock = NULL;
+Monitor* ProfileVM_lock = NULL;
+Mutex* ProfilePrint_lock = NULL;
+Mutex* ExceptionCache_lock = NULL;
+Monitor* ObjAllocPost_lock = NULL;
+Mutex* OsrList_lock = NULL;
+#ifndef PRODUCT
+Mutex* FullGCALot_lock = NULL;
+#endif
+
+Mutex* Debug1_lock = NULL;
+Mutex* Debug2_lock = NULL;
+Mutex* Debug3_lock = NULL;
+
+Mutex* tty_lock = NULL;
+
+Mutex* RawMonitor_lock = NULL;
+Mutex* PerfDataMemAlloc_lock = NULL;
+Mutex* PerfDataManager_lock = NULL;
+Mutex* OopMapCacheAlloc_lock = NULL;
+
+Monitor* GCTaskManager_lock = NULL;
+
+Mutex* Management_lock = NULL;
+Monitor* LowMemory_lock = NULL;
+
+#define MAX_NUM_MUTEX 128
+static Monitor * _mutex_array[MAX_NUM_MUTEX];
+static int _num_mutex;
+
+#ifdef ASSERT
+void assert_locked_or_safepoint(const Monitor * lock) {
+ // check if this thread owns the lock (common case)
+ if (IgnoreLockingAssertions) return;
+ assert(lock != NULL, "Need non-NULL lock");
+ if (lock->owned_by_self()) return;
+ if (SafepointSynchronize::is_at_safepoint()) return;
+ if (!Universe::is_fully_initialized()) return;
+ // see if invoker of VM operation owns it
+ VM_Operation* op = VMThread::vm_operation();
+ if (op != NULL && op->calling_thread() == lock->owner()) return;
+ fatal1("must own lock %s", lock->name());
+}
+
+// a stronger assertion than the above
+void assert_lock_strong(const Monitor * lock) {
+ if (IgnoreLockingAssertions) return;
+ assert(lock != NULL, "Need non-NULL lock");
+ if (lock->owned_by_self()) return;
+ fatal1("must own lock %s", lock->name());
+}
+#endif
+
+#define def(var, type, pri, vm_block) { \
+ var = new type(Mutex::pri, #var, vm_block); \
+ assert(_num_mutex < MAX_NUM_MUTEX, \
+ "increase MAX_NUM_MUTEX"); \
+ _mutex_array[_num_mutex++] = var; \
+}
+
+void mutex_init() {
+ def(tty_lock , Mutex , event, true ); // allow to lock in VM
+
+ def(CGC_lock , Monitor, special, true ); // coordinate between fore- and background GC
+ def(STS_init_lock , Mutex, leaf, true );
+ if (UseConcMarkSweepGC) {
+ def(iCMS_lock , Monitor, special, true ); // CMS incremental mode start/stop notification
+ def(FullGCCount_lock , Monitor, leaf, true ); // in support of ExplicitGCInvokesConcurrent
+ }
+ def(ParGCRareEvent_lock , Mutex , leaf , true );
+ def(DerivedPointerTableGC_lock , Mutex, leaf, true );
+ def(CodeCache_lock , Mutex , special, true );
+ def(Interrupt_lock , Monitor, special, true ); // used for interrupt processing
+ def(RawMonitor_lock , Mutex, special, true );
+ def(OopMapCacheAlloc_lock , Mutex, leaf, true ); // used for oop_map_cache allocation.
+
+ def(Patching_lock , Mutex , special, true ); // used for safepointing and code patching.
+ def(ObjAllocPost_lock , Monitor, special, false);
+ def(LowMemory_lock , Monitor, special, true ); // used for low memory detection
+ def(JmethodIdCreation_lock , Mutex , leaf, true ); // used for creating jmethodIDs.
+
+ def(SystemDictionary_lock , Monitor, leaf, true ); // lookups done by VM thread
+ def(PackageTable_lock , Mutex , leaf, false);
+ def(InlineCacheBuffer_lock , Mutex , leaf, true );
+ def(VMStatistic_lock , Mutex , leaf, false);
+ def(ExpandHeap_lock , Mutex , leaf, true ); // Used during compilation by VM thread
+ def(JNIHandleBlockFreeList_lock , Mutex , leaf, true ); // handles are used by VM thread
+ def(SignatureHandlerLibrary_lock , Mutex , leaf, false);
+ def(SymbolTable_lock , Mutex , leaf, true );
+ def(StringTable_lock , Mutex , leaf, true );
+ def(ProfilePrint_lock , Mutex , leaf, false); // serial profile printing
+ def(ExceptionCache_lock , Mutex , leaf, false); // serial profile printing
+ def(OsrList_lock , Mutex , leaf, true );
+ def(Debug1_lock , Mutex , leaf, true );
+#ifndef PRODUCT
+ def(FullGCALot_lock , Mutex , leaf, false); // a lock to make FullGCALot MT safe
+#endif
+ def(BeforeExit_lock , Monitor, leaf, true );
+ def(PerfDataMemAlloc_lock , Mutex , leaf, true ); // used for allocating PerfData memory for performance data
+ def(PerfDataManager_lock , Mutex , leaf, true ); // used for synchronized access to PerfDataManager resources
+
+ // CMS_modUnionTable_lock leaf
+ // CMS_bitMap_lock leaf + 1
+ // CMS_freeList_lock leaf + 2
+
+ def(Safepoint_lock , Monitor, safepoint, true ); // locks SnippetCache_lock/Threads_lock
+
+ if (!UseMembar) {
+ def(SerializePage_lock , Monitor, leaf, true );
+ }
+
+ def(Threads_lock , Monitor, barrier, true );
+
+ def(VMOperationQueue_lock , Monitor, nonleaf, true ); // VM_thread allowed to block on these
+ def(VMOperationRequest_lock , Monitor, nonleaf, true );
+ def(RetData_lock , Mutex , nonleaf, false);
+ def(Terminator_lock , Monitor, nonleaf, true );
+ def(VtableStubs_lock , Mutex , nonleaf, true );
+ def(Notify_lock , Monitor, nonleaf, true );
+ def(JNIGlobalHandle_lock , Mutex , nonleaf, true ); // locks JNIHandleBlockFreeList_lock
+ def(JNICritical_lock , Monitor, nonleaf, true ); // used for JNI critical regions
+ def(AdapterHandlerLibrary_lock , Mutex , nonleaf, true);
+ if (UseConcMarkSweepGC) {
+ def(SLT_lock , Monitor, nonleaf, false );
+ // used in CMS GC for locking PLL lock
+ }
+ def(Heap_lock , Mutex , nonleaf+1, false);
+ def(JfieldIdCreation_lock , Mutex , nonleaf+1, true ); // jfieldID, Used in VM_Operation
+ def(JNICachedItableIndex_lock , Mutex , nonleaf+1, false); // Used to cache an itable index during JNI invoke
+
+ def(CompiledIC_lock , Mutex , nonleaf+2, false); // locks VtableStubs_lock, InlineCacheBuffer_lock
+ def(CompileTaskAlloc_lock , Mutex , nonleaf+2, true );
+ def(CompileStatistics_lock , Mutex , nonleaf+2, false);
+ def(MultiArray_lock , Mutex , nonleaf+2, false); // locks SymbolTable_lock
+
+ def(JvmtiThreadState_lock , Mutex , nonleaf+2, false); // Used by JvmtiThreadState/JvmtiEventController
+ def(JvmtiPendingEvent_lock , Monitor, nonleaf, false); // Used by JvmtiCodeBlobEvents
+ def(Management_lock , Mutex , nonleaf+2, false); // used for JVM management
+
+ def(Compile_lock , Mutex , nonleaf+3, true );
+ def(MethodData_lock , Mutex , nonleaf+3, false);
+
+ def(MethodCompileQueue_lock , Monitor, nonleaf+4, true );
+ def(Debug2_lock , Mutex , nonleaf+4, true );
+ def(Debug3_lock , Mutex , nonleaf+4, true );
+ def(ProfileVM_lock , Monitor, nonleaf+4, false); // used for profiling of the VMThread
+ def(CompileThread_lock , Monitor, nonleaf+5, false );
+#ifdef TIERED
+ def(C1_lock , Monitor, nonleaf+5, false );
+#endif // TIERED
+
+
+}
+
+GCMutexLocker::GCMutexLocker(Monitor * mutex) {
+ if (SafepointSynchronize::is_at_safepoint()) {
+ _locked = false;
+ } else {
+ _mutex = mutex;
+ _locked = true;
+ _mutex->lock();
+ }
+}
+
+// Print all mutexes/monitors that are currently owned by a thread; called
+// by fatal error handler.
+void print_owned_locks_on_error(outputStream* st) {
+ st->print("VM Mutex/Monitor currently owned by a thread: ");
+ bool none = true;
+ for (int i = 0; i < _num_mutex; i++) {
+ // see if it has an owner
+ if (_mutex_array[i]->owner() != NULL) {
+ if (none) {
+ // print format used by Mutex::print_on_error()
+ st->print_cr(" ([mutex/lock_event])");
+ none = false;
+ }
+ _mutex_array[i]->print_on_error(st);
+ st->cr();
+ }
+ }
+ if (none) st->print_cr("None");
+}