1 /*
   2  * Copyright (c) 1999, 2007, 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  *
  23  */
  24 
  25 ///////////////////////////////////////////////////////////////
  26 //
  27 // class JvmtiTrace
  28 //
  29 // Support for JVMTI tracing code
  30 //
  31 
  32 // Support tracing except in product build on the client compiler
  33 #ifndef PRODUCT
  34 #define JVMTI_TRACE 1
  35 #else
  36 #ifdef COMPILER2
  37 #define JVMTI_TRACE 1
  38 #endif
  39 #endif
  40 
  41 #ifdef JVMTI_TRACE
  42 
  43 class JvmtiTrace : AllStatic {
  44 
  45   static bool        _initialized;
  46   static bool        _on;
  47   static bool        _trace_event_controller;
  48   static jbyte       _trace_flags[];
  49   static jbyte       _event_trace_flags[];
  50   static const char* _event_names[];
  51   static jint        _max_function_index;
  52   static jint        _max_event_index;
  53   static short       _exclude_functions[];
  54   static const char* _function_names[];
  55 
  56 public:
  57 
  58   enum {
  59     SHOW_IN =              01,
  60     SHOW_OUT =             02,
  61     SHOW_ERROR =           04,
  62     SHOW_IN_DETAIL =      010,
  63     SHOW_OUT_DETAIL =     020,
  64     SHOW_EVENT_TRIGGER =  040,
  65     SHOW_EVENT_SENT =    0100
  66   };
  67 
  68   static bool tracing()                     { return _on; }
  69   static bool trace_event_controller()      { return _trace_event_controller; }
  70   static jbyte trace_flags(int num)         { return _trace_flags[num]; }
  71   static jbyte event_trace_flags(int num)   { return _event_trace_flags[num]; }
  72   static const char* function_name(int num) { return _function_names[num]; } // To Do: add range checking
  73 
  74   static const char* event_name(int num) {
  75     static char* ext_event_name = (char*)"(extension event)";
  76     if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) {
  77       return _event_names[num];
  78     } else {
  79       return ext_event_name;
  80     }
  81   }
  82 
  83   static const char* enum_name(const char** names, const jint* values, jint value);
  84 
  85   static void initialize();
  86   static void shutdown();
  87 
  88   // return a valid string no matter what state the thread is in
  89   static const char *safe_get_thread_name(Thread *thread);
  90 
  91   // return the name of the current thread
  92   static const char *safe_get_current_thread_name();
  93 
  94   // return a valid string no matter what the state of k_mirror
  95   static const char *get_class_name(oop k_mirror);
  96 };
  97 
  98 #endif /*JVMTI_TRACE */