1 /*
   2  * Copyright (c) 2017, 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_JFR_JNI_JFRJAVACALL_HPP
  26 #define SHARE_JFR_JNI_JFRJAVACALL_HPP
  27 
  28 #include "jni.h"
  29 #include "jfr/utilities/jfrAllocation.hpp"
  30 #include "utilities/exceptions.hpp"
  31 #include "utilities/macros.hpp"
  32 
  33 class JavaCallArguments;
  34 class JavaThread;
  35 class JavaValue;
  36 class Klass;
  37 class Symbol;
  38 
  39 class JfrJavaArguments : public StackObj {
  40   friend class JfrJavaCall;
  41  public:
  42   JfrJavaArguments(JavaValue* result);
  43   JfrJavaArguments(JavaValue* result, const char* klass_name, const char* name, const char* signature, TRAPS);
  44   JfrJavaArguments(JavaValue* result, const Klass* klass, const Symbol* name, const Symbol* signature);
  45 
  46   Klass* klass() const;
  47   void set_klass(const char* klass_name, TRAPS);
  48   void set_klass(const Klass* klass);
  49 
  50   Symbol* name() const;
  51   void set_name(const char* name);
  52   void set_name(const Symbol* name);
  53 
  54   Symbol* signature() const;
  55   void set_signature(const char* signature);
  56   void set_signature(const Symbol* signature);
  57 
  58   int array_length() const;
  59   void set_array_length(int length);
  60 
  61   JavaValue* result() const;
  62 
  63   bool has_receiver() const;
  64   void set_receiver(const oop receiver);
  65   void set_receiver(Handle receiver);
  66   oop receiver() const;
  67 
  68   // parameters
  69   void push_oop(const oop obj);
  70   void push_oop(Handle h_obj);
  71   void push_jobject(jobject h);
  72   void push_int(jint i);
  73   void push_double(jdouble d);
  74   void push_long(jlong l);
  75   void push_float(jfloat f);
  76 
  77   int length() const;
  78   const JavaValue& param(int idx) const;
  79 
  80  private:
  81   class Parameters {
  82     friend class JfrJavaArguments;
  83    private:
  84     enum { SIZE = 16};
  85     JavaValue _storage[SIZE];
  86     int _storage_index;
  87     int _java_stack_slots;
  88 
  89     Parameters();
  90     NONCOPYABLE(Parameters);
  91 
  92     void push(const JavaValue& value);
  93     void push_large(const JavaValue& value);
  94 
  95     void push_oop(const oop obj);
  96     void push_oop(Handle h_obj);
  97     void push_jobject(jobject h);
  98     void push_jint(jint i);
  99     void push_jdouble(jdouble d);
 100     void push_jlong(jlong l);
 101     void push_jfloat(jfloat f);
 102 
 103     bool has_receiver() const;
 104     void set_receiver(const oop receiver);
 105     void set_receiver(Handle receiver);
 106     oop receiver() const;
 107 
 108     int length() const;
 109     int java_stack_slots() const;
 110 
 111     void copy(JavaCallArguments& args, TRAPS) const;
 112     const JavaValue& values(int idx) const;
 113   };
 114 
 115   Parameters _params;
 116   const JavaValue* const _result;
 117   const Klass* _klass;
 118   const Symbol* _name;
 119   const Symbol* _signature;
 120   int _array_length;
 121 
 122   int java_call_arg_slots() const;
 123   void copy(JavaCallArguments& args, TRAPS);
 124 };
 125 
 126 class JfrJavaCall : public AllStatic {
 127   friend class JfrJavaSupport;
 128  private:
 129   static void call_static(JfrJavaArguments* args, TRAPS);
 130   static void call_special(JfrJavaArguments* args, TRAPS);
 131   static void call_virtual(JfrJavaArguments* args, TRAPS);
 132 };
 133 
 134 #endif // SHARE_JFR_JNI_JFRJAVACALL_HPP