jdk8-mips64-public/hotspot: src/share/vm/utilities/decoder.hpp@d2a62e0f25eb (annotated)

src/share/vm/utilities/decoder.hpp@d2a62e0f25eb (annotated)

src/share/vm/utilities/decoder.hpp

Thu, 28 Jun 2012 17:03:16 -0400

author: zgu
date: Thu, 28 Jun 2012 17:03:16 -0400
changeset 3900: d2a62e0f25eb
parent 3544: db006a85bf91
child 3961: 3b01d0321dfa
permissions: -rw-r--r--

6995781: Native Memory Tracking (Phase 1)
7151532: DCmd for hotspot native memory tracking
Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd
Reviewed-by: acorn, coleenp, fparain

 /*
  * Copyright (c) 1997, 2012, 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_UTILITIES_DECODER_HPP
 #define SHARE_VM_UTILITIES_DECODER_HPP
 #include "memory/allocation.hpp"
 #include "runtime/mutex.hpp"
 class AbstractDecoder : public CHeapObj<mtInternal> {
 public:
   // status code for decoding native C frame
   enum decoder_status {
          not_available = -10,  // real decoder is not available
          no_error = 0,         // successfully decoded frames
          out_of_memory,        // out of memory
          file_invalid,         // invalid elf file
          file_not_found,       // could not found symbol file (on windows), such as jvm.pdb or jvm.map
          helper_not_found,     // could not load dbghelp.dll (Windows only)
          helper_func_error,    // decoding functions not found (Windows only)
          helper_init_error     // SymInitialize failed (Windows only)
   };
   // decode an pc address to corresponding function name and an offset from the beginning of
   // the function
   virtual bool decode(address pc, char* buf, int buflen, int* offset,
     const char* modulepath = NULL) = 0;
   // demangle a C++ symbol
   virtual bool demangle(const char* symbol, char* buf, int buflen) = 0;
   // if the decoder can decode symbols in vm
   virtual bool can_decode_C_frame_in_vm() const = 0;
   virtual decoder_status status() const {
     return _decoder_status;
   }
   virtual bool has_error() const {
     return is_error(_decoder_status);
   }
   static bool is_error(decoder_status status) {
     return (status > 0);
   }
 protected:
   decoder_status  _decoder_status;
 };
 // Do nothing decoder
 class NullDecoder : public AbstractDecoder {
 public:
   NullDecoder() {
     _decoder_status = not_available;
   }
   ~NullDecoder() {};
   virtual bool decode(address pc, char* buf, int buflen, int* offset,
     const char* modulepath = NULL) {
     return false;
   }
   virtual bool demangle(const char* symbol, char* buf, int buflen) {
     return false;
   }
   virtual bool can_decode_C_frame_in_vm() const {
     return false;
   }
 };
 class Decoder : AllStatic {
 public:
   static bool decode(address pc, char* buf, int buflen, int* offset, const char* modulepath = NULL);
   static bool demangle(const char* symbol, char* buf, int buflen);
   static bool can_decode_C_frame_in_vm();
   // shutdown shared instance
   static void shutdown();
 protected:
   // shared decoder instance, _shared_instance_lock is needed
   static AbstractDecoder* get_shared_instance();
   // a private instance for error handler. Error handler can be
   // triggered almost everywhere, including signal handler, where
   // no lock can be taken. So the shared decoder can not be used
   // in this scenario.
   static AbstractDecoder* get_error_handler_instance();
   static AbstractDecoder* create_decoder();
 private:
   static AbstractDecoder*     _shared_decoder;
   static AbstractDecoder*     _error_handler_decoder;
   static NullDecoder          _do_nothing_decoder;
 protected:
   static Mutex*               _shared_decoder_lock;
 };
 #endif // SHARE_VM_UTILITIES_DECODER_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/decoder.hpp@d2a62e0f25eb (annotated)

src/share/vm/utilities/decoder.hpp