1 /*
   2  * Copyright (c) 2016, 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_JFR_JNI_JFRJAVASUPPORT_HPP
  26 #define SHARE_VM_JFR_JNI_JFRJAVASUPPORT_HPP
  27 
  28 #include "jfr/jni/jfrJavaCall.hpp"
  29 #include "utilities/exceptions.hpp"
  30 
  31 class Klass;
  32 class JavaThread;
  33 class outputStream;
  34 
  35 class JfrJavaSupport : public AllStatic {
  36  public:
  37   static jobject local_jni_handle(const oop obj, Thread* t);
  38   static jobject local_jni_handle(const jobject handle, Thread* t);
  39   static void destroy_local_jni_handle(const jobject handle);
  40 
  41   static jobject global_jni_handle(const oop obj, Thread* t);
  42   static jobject global_jni_handle(const jobject handle, Thread* t);
  43   static void destroy_global_jni_handle(const jobject handle);
  44 
  45   static oop resolve_non_null(jobject obj);
  46   static void notify_all(jobject obj, TRAPS);
  47   static void set_array_element(jobjectArray arr, jobject element, int index, Thread* t);
  48 
  49   // naked oop result
  50   static void call_static(JfrJavaArguments* args, TRAPS);
  51   static void call_special(JfrJavaArguments* args, TRAPS);
  52   static void call_virtual(JfrJavaArguments* args, TRAPS);
  53 
  54   static void set_field(JfrJavaArguments* args, TRAPS);
  55   static void get_field(JfrJavaArguments* args, TRAPS);
  56   static void new_object(JfrJavaArguments* args, TRAPS);
  57 
  58   // global jni handle result
  59   static void new_object_global_ref(JfrJavaArguments* args, TRAPS);
  60   static void get_field_global_ref(JfrJavaArguments* args, TRAPS);
  61 
  62   // local jni handle result
  63   static void new_object_local_ref(JfrJavaArguments* args, TRAPS);
  64   static void get_field_local_ref(JfrJavaArguments* args, TRAPS);
  65 
  66   static jstring new_string(const char* c_str, TRAPS);
  67   static jobjectArray new_string_array(int length, TRAPS);
  68 
  69   static jobject new_java_lang_Boolean(bool value, TRAPS);
  70   static jobject new_java_lang_Integer(jint value, TRAPS);
  71   static jobject new_java_lang_Long(jlong value, TRAPS);
  72 
  73   // misc
  74   static Klass* klass(const jobject handle);
  75   // caller needs ResourceMark
  76   static const char* c_str(jstring string, Thread* jt);
  77 
  78   // exceptions
  79   static void throw_illegal_state_exception(const char* message, TRAPS);
  80   static void throw_illegal_argument_exception(const char* message, TRAPS);
  81   static void throw_internal_error(const char* message, TRAPS);
  82   static void throw_out_of_memory_error(const char* message, TRAPS);
  83   static void throw_class_format_error(const char* message, TRAPS);
  84 
  85   static jlong jfr_thread_id(jobject target_thread);
  86 
  87   // critical
  88   static void abort(jstring errorMsg, TRAPS);
  89   static void uncaught_exception(jthrowable throwable, Thread* t);
  90 
  91   // asserts
  92   DEBUG_ONLY(static void check_java_thread_in_vm(Thread* t);)
  93   DEBUG_ONLY(static void check_java_thread_in_native(Thread* t);)
  94 
  95   enum CAUSE {
  96     VM_ERROR,
  97     OUT_OF_MEMORY,
  98     STACK_OVERFLOW,
  99     RUNTIME_EXCEPTION,
 100     UNKNOWN,
 101     NOF_CAUSES
 102   };
 103 
 104   static CAUSE cause();
 105 
 106  private:
 107   static CAUSE _cause;
 108   static void set_cause(jthrowable throwable, Thread* t);
 109 };
 110 
 111 #endif // SHARE_VM_JFR_JNI_JFRJAVASUPPORT_HPP