src/share/vm/services/heapDumper.cpp

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   1 /*
   2  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


1374   }
1375 
1376   // HPROF_TRACE and HPROF_FRAME records
1377   void dump_stack_traces();
1378 
1379   // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record
1380   void write_dump_header();
1381 
1382   // fixes up the length of the current dump record
1383   void write_current_dump_record_length();
1384 
1385   // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END
1386   // record in the case of a segmented heap dump)
1387   void end_of_dump();
1388 
1389  public:
1390   VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump, bool oome) :
1391     VM_GC_Operation(0 /* total collections,      dummy, ignored */,
1392                     0 /* total full collections, dummy, ignored */,
1393                     gc_before_heap_dump) {

1394     _local_writer = writer;
1395     _gc_before_heap_dump = gc_before_heap_dump;
1396     _is_segmented_dump = false;
1397     _dump_start = (jlong)-1;
1398     _klass_map = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true);
1399     _stack_traces = NULL;
1400     _num_threads = 0;
1401     if (oome) {
1402       assert(!Thread::current()->is_VM_thread(), "Dump from OutOfMemoryError cannot be called by the VMThread");
1403       // get OutOfMemoryError zero-parameter constructor
1404       instanceKlass* oome_ik = instanceKlass::cast(SystemDictionary::OutOfMemoryError_klass());
1405       _oome_constructor = oome_ik->find_method(vmSymbols::object_initializer_name(),
1406                                                           vmSymbols::void_method_signature());
1407       // get thread throwing OOME when generating the heap dump at OOME
1408       _oome_thread = JavaThread::current();
1409     } else {
1410       _oome_thread = NULL;
1411       _oome_constructor = NULL;
1412     }
1413   }


   1 /*
   2  * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


1374   }
1375 
1376   // HPROF_TRACE and HPROF_FRAME records
1377   void dump_stack_traces();
1378 
1379   // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record
1380   void write_dump_header();
1381 
1382   // fixes up the length of the current dump record
1383   void write_current_dump_record_length();
1384 
1385   // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END
1386   // record in the case of a segmented heap dump)
1387   void end_of_dump();
1388 
1389  public:
1390   VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump, bool oome) :
1391     VM_GC_Operation(0 /* total collections,      dummy, ignored */,
1392                     0 /* total full collections, dummy, ignored */,
1393                     gc_before_heap_dump) {
1394     _gc_cause = GCCause::_heap_dump;
1395     _local_writer = writer;
1396     _gc_before_heap_dump = gc_before_heap_dump;
1397     _is_segmented_dump = false;
1398     _dump_start = (jlong)-1;
1399     _klass_map = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true);
1400     _stack_traces = NULL;
1401     _num_threads = 0;
1402     if (oome) {
1403       assert(!Thread::current()->is_VM_thread(), "Dump from OutOfMemoryError cannot be called by the VMThread");
1404       // get OutOfMemoryError zero-parameter constructor
1405       instanceKlass* oome_ik = instanceKlass::cast(SystemDictionary::OutOfMemoryError_klass());
1406       _oome_constructor = oome_ik->find_method(vmSymbols::object_initializer_name(),
1407                                                           vmSymbols::void_method_signature());
1408       // get thread throwing OOME when generating the heap dump at OOME
1409       _oome_thread = JavaThread::current();
1410     } else {
1411       _oome_thread = NULL;
1412       _oome_constructor = NULL;
1413     }
1414   }