JDK14/Java14源码在线阅读

/*
 * Copyright (c) 1999, 2019, 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_PRIMS_JVMTITRACE_HPP
#define SHARE_PRIMS_JVMTITRACE_HPP

#include "classfile/systemDictionary.hpp"
#include "jvmtifiles/jvmti.h"
#include "oops/objArrayOop.hpp"
#include "prims/jvmtiEnvThreadState.hpp"
#include "prims/jvmtiEventController.hpp"
#include "prims/jvmtiUtil.hpp"
#include "runtime/stackValueCollection.hpp"
#include "runtime/vmOperations.hpp"

///////////////////////////////////////////////////////////////
//
// class JvmtiTrace
//
// Support for JVMTI tracing code
//

// Support tracing except in product build on the client compiler
#ifndef PRODUCT
#define JVMTI_TRACE
#else
#ifdef COMPILER2
#define JVMTI_TRACE
#endif
#endif

#ifdef JVMTI_TRACE

class JvmtiTrace : AllStatic {

  static bool        _initialized;
  static bool        _on;
  static bool        _trace_event_controller;
  static jbyte       _trace_flags[];
  static jbyte       _event_trace_flags[];
  static const char* _event_names[];
  static jint        _max_function_index;
  static jint        _max_event_index;
  static short       _exclude_functions[];
  static const char* _function_names[];

public:

  enum {
    SHOW_IN =              01,
    SHOW_OUT =             02,
    SHOW_ERROR =           04,
    SHOW_IN_DETAIL =      010,
    SHOW_OUT_DETAIL =     020,
    SHOW_EVENT_TRIGGER =  040,
    SHOW_EVENT_SENT =    0100
  };

  static bool tracing()                     { return _on; }
  static bool trace_event_controller()      { return _trace_event_controller; }
  static jbyte trace_flags(int num)         { return _trace_flags[num]; }
  static jbyte event_trace_flags(int num)   { return _event_trace_flags[num]; }
  static const char* function_name(int num) { return _function_names[num]; } // To Do: add range checking

  static const char* event_name(int num) {
    static char* ext_event_name = (char*)"(extension event)";
    if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) {
      return _event_names[num];
    } else {
      return ext_event_name;
    }
  }

  static const char* enum_name(const char** names, const jint* values, jint value);

  static void initialize();
  static void shutdown();


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