1 /*
   2  * Copyright (c) 2012, 2019, 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 #ifndef SHARE_VM_TRACE_TRACESTREAM_HPP
  26 #define SHARE_VM_TRACE_TRACESTREAM_HPP
  27 
  28 #include "utilities/macros.hpp"
  29 #if INCLUDE_TRACE
  30 #include "oops/klass.hpp"
  31 #include "oops/method.hpp"
  32 #include "oops/symbol.hpp"
  33 #include "memory/allocation.hpp"
  34 #include "utilities/debug.hpp"
  35 #include "utilities/ostream.hpp"
  36 
  37 class ClassLoaderData;
  38 class Klass;
  39 class Method;
  40 
  41 class TraceStream : public StackObj {
  42  public:
  43   TraceStream() {
  44     assert(tty != NULL, "invariant");
  45   }
  46 
  47   void print(const char* val) const {
  48     tty->print("%s", val);
  49   }
  50 
  51   void print_val(const char* label, u1 val) const {
  52     tty->print("%s = " UINT32_FORMAT, label, val);
  53   }
  54 
  55   void print_val(const char* label, u2 val) const {
  56     tty->print("%s = " UINT32_FORMAT, label, val);
  57   }
  58 
  59   void print_val(const char* label, s2 val) const {
  60     tty->print("%s = " INT32_FORMAT, label, val);
  61   }
  62 
  63   void print_val(const char* label, u4 val) const {
  64     tty->print("%s = " UINT32_FORMAT, label, val);
  65   }
  66 
  67   void print_val(const char* label, s4 val) const {
  68     tty->print("%s = " INT32_FORMAT, label, val);
  69   }
  70 
  71   void print_val(const char* label, u8 val) const {
  72     tty->print("%s = " UINT64_FORMAT, label, val);
  73   }
  74 
  75   void print_val(const char* label, s8 val) const {
  76     tty->print("%s = " INT64_FORMAT, label, (int64_t) val);
  77   }
  78 
  79   void print_val(const char* label, bool val) const {
  80     tty->print("%s = %s", label, val ? "true" : "false");
  81   }
  82 
  83   // Caller is machine generated code located in traceEventClasses.hpp
  84   // Event<TraceId>::writeEvent() (pseudocode) contains the
  85   // necessary ResourceMark for the resource allocations below.
  86   // See traceEventClasses.xsl for details.
  87   void print_val(const char* label, const Klass* const val) {
  88     const char* description = "NULL";
  89     if (val != NULL) {
  90       Symbol* name = val->name();
  91       if (name != NULL) {
  92         description = name->as_C_string();
  93       }
  94     }
  95     tty->print("%s = %s", label, description);
  96   }
  97 
  98   // Caller is machine generated code located in traceEventClasses.hpp
  99   // Event<TraceId>::writeEvent() (pseudocode) contains the
 100   // necessary ResourceMark for the resource allocations below.
 101   // See traceEventClasses.xsl for details.
 102   void print_val(const char* label, const Method* const val) {
 103     const char* description = "NULL";
 104     if (val != NULL) {
 105       description = val->name_and_sig_as_C_string();
 106     }
 107     tty->print("%s = %s", label, description);
 108   }
 109 
 110   void print_val(const char* label, float val) const {
 111     tty->print("%s = %f", label, val);
 112   }
 113 
 114   void print_val(const char* label, double val) const {
 115     tty->print("%s = %f", label, val);
 116   }
 117 
 118   void print_val(const char* label, const char* val) const {
 119     tty->print("%s = '%s'", label, val);
 120   }
 121 
 122   void print_val(const char* label, const Klass* val) const;
 123   void print_val(const char* label, const Method* val) const ;
 124   void print_val(const char* label, const ClassLoaderData* cld) const;
 125 };
 126 
 127 #endif // INCLUDE_TRACE
 128 #endif // SHARE_VM_TRACE_TRACESTREAM_HPP