1 /*
  2  * Copyright (c) 2016, 2021, 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_JFRJAVASUPPORT_HPP
 26 #define SHARE_JFR_JNI_JFRJAVASUPPORT_HPP
 27 
 28 #include "jfr/jni/jfrJavaCall.hpp"
 29 #include "utilities/exceptions.hpp"
 30 
 31 class Klass;
 32 class outputStream;
 33 
 34 class JfrJavaSupport : public AllStatic {
 35  public:
 36   static jobject local_jni_handle(const oop obj, JavaThread* t);
 37   static jobject local_jni_handle(const jobject handle, JavaThread* t);
 38   static void destroy_local_jni_handle(jobject handle);
 39 
 40   static jobject global_jni_handle(const oop obj, JavaThread* t);
 41   static jobject global_jni_handle(const jobject handle, JavaThread* t);
 42   static void destroy_global_jni_handle(jobject handle);
 43 
 44   static jweak global_weak_jni_handle(const oop obj, JavaThread* t);
 45   static jweak global_weak_jni_handle(const jobject handle, JavaThread* t);
 46   static void destroy_global_weak_jni_handle(jweak handle);
 47 
 48   static oop resolve_non_null(jobject obj);
 49   static void notify_all(jobject obj, TRAPS);
 50   static void set_array_element(jobjectArray arr, jobject element, int index, JavaThread* t);
 51 
 52   // naked oop result
 53   static void call_static(JfrJavaArguments* args, TRAPS);
 54   static void call_special(JfrJavaArguments* args, TRAPS);
 55   static void call_virtual(JfrJavaArguments* args, TRAPS);
 56 
 57   static void set_field(JfrJavaArguments* args, TRAPS);
 58   static void get_field(JfrJavaArguments* args, TRAPS);
 59   static void new_object(JfrJavaArguments* args, TRAPS);
 60 
 61   // global jni handle result
 62   static void new_object_global_ref(JfrJavaArguments* args, TRAPS);
 63   static void get_field_global_ref(JfrJavaArguments* args, TRAPS);
 64 
 65   // local jni handle result
 66   static void new_object_local_ref(JfrJavaArguments* args, TRAPS);
 67   static void get_field_local_ref(JfrJavaArguments* args, TRAPS);
 68 
 69   static jstring new_string(const char* c_str, TRAPS);
 70   static jobjectArray new_string_array(int length, TRAPS);
 71 
 72   static jobject new_java_lang_Boolean(bool value, TRAPS);
 73   static jobject new_java_lang_Integer(jint value, TRAPS);
 74   static jobject new_java_lang_Long(jlong value, TRAPS);
 75 
 76   // fields
 77   static bool compute_field_offset(int &dest_offset,
 78                                    Klass* klass,
 79                                    Symbol* name_symbol,
 80                                    Symbol* signature_symbol,
 81                                    bool is_static = false,
 82                                    bool allow_super = false);
 83 
 84   // misc
 85   static Klass* klass(const jobject handle);
 86   static const char* c_str(jstring string, JavaThread* jt, bool c_heap = false);
 87   static const char* c_str(oop string, JavaThread* jt, bool c_heap = false);
 88 
 89   // exceptions
 90   static void throw_illegal_state_exception(const char* message, TRAPS);
 91   static void throw_illegal_argument_exception(const char* message, TRAPS);
 92   static void throw_internal_error(const char* message, TRAPS);
 93   static void throw_out_of_memory_error(const char* message, TRAPS);
 94   static void throw_class_format_error(const char* message, TRAPS);
 95   static void throw_runtime_exception(const char* message, TRAPS);
 96 
 97   // visibility graph
 98   static bool is_jdk_jfr_module_available();
 99   static bool is_jdk_jfr_module_available(outputStream* stream, TRAPS);
100 
101   // thread
102   static JavaThread* get_native(jobject thread);
103   static jlong jfr_thread_id(jobject thread);
104   static void exclude(jobject thread);
105   static void include(jobject thread);
106   static bool is_excluded(jobject thread);
107   static bool on_thread_start(JavaThread* jt, jobject vthread = NULL);
108 
109   static jobject get_handler(jobject clazz, TRAPS);
110   static bool set_handler(jobject clazz, jobject handler, TRAPS);
111 
112   // critical
113   static void abort(jstring errorMsg, TRAPS);
114   static void uncaught_exception(jthrowable throwable, JavaThread* t);
115 
116   // asserts
117   DEBUG_ONLY(static void check_java_thread_in_vm(JavaThread* t);)
118   DEBUG_ONLY(static void check_java_thread_in_native(JavaThread* t);)
119   DEBUG_ONLY(static void check_java_thread_in_java(JavaThread* t););
120 
121   enum CAUSE {
122     VM_ERROR,
123     OUT_OF_MEMORY,
124     STACK_OVERFLOW,
125     RUNTIME_EXCEPTION,
126     UNKNOWN,
127     NOF_CAUSES
128   };
129 
130   static CAUSE cause();
131 
132  private:
133   static CAUSE _cause;
134   static void set_cause(jthrowable throwable, JavaThread* t);
135 };
136 
137 #endif // SHARE_JFR_JNI_JFRJAVASUPPORT_HPP