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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ART_RUNTIME_MIRROR_STACK_TRACE_ELEMENT_H_
     18 #define ART_RUNTIME_MIRROR_STACK_TRACE_ELEMENT_H_
     19 
     20 #include "gc_root.h"
     21 #include "object.h"
     22 
     23 namespace art {
     24 
     25 template<class T> class Handle;
     26 struct StackTraceElementOffsets;
     27 
     28 namespace mirror {
     29 
     30 // C++ mirror of java.lang.StackTraceElement
     31 class MANAGED StackTraceElement FINAL : public Object {
     32  public:
     33   String* GetDeclaringClass() REQUIRES_SHARED(Locks::mutator_lock_) {
     34     return GetFieldObject<String>(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, declaring_class_));
     35   }
     36 
     37   String* GetMethodName() REQUIRES_SHARED(Locks::mutator_lock_) {
     38     return GetFieldObject<String>(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, method_name_));
     39   }
     40 
     41   String* GetFileName() REQUIRES_SHARED(Locks::mutator_lock_) {
     42     return GetFieldObject<String>(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, file_name_));
     43   }
     44 
     45   int32_t GetLineNumber() REQUIRES_SHARED(Locks::mutator_lock_) {
     46     return GetField32(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, line_number_));
     47   }
     48 
     49   static StackTraceElement* Alloc(Thread* self,
     50                                   Handle<String> declaring_class,
     51                                   Handle<String> method_name,
     52                                   Handle<String> file_name,
     53                                   int32_t line_number)
     54       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
     55 
     56   static void SetClass(ObjPtr<Class> java_lang_StackTraceElement);
     57   static void ResetClass();
     58   static void VisitRoots(RootVisitor* visitor)
     59       REQUIRES_SHARED(Locks::mutator_lock_);
     60   static Class* GetStackTraceElement() REQUIRES_SHARED(Locks::mutator_lock_) {
     61     DCHECK(!java_lang_StackTraceElement_.IsNull());
     62     return java_lang_StackTraceElement_.Read();
     63   }
     64 
     65  private:
     66   // Field order required by test "ValidateFieldOrderOfJavaCppUnionClasses".
     67   HeapReference<String> declaring_class_;
     68   HeapReference<String> file_name_;
     69   HeapReference<String> method_name_;
     70   int32_t line_number_;
     71 
     72   template<bool kTransactionActive>
     73   void Init(ObjPtr<String> declaring_class,
     74             ObjPtr<String> method_name,
     75             ObjPtr<String> file_name,
     76             int32_t line_number)
     77       REQUIRES_SHARED(Locks::mutator_lock_);
     78 
     79   static GcRoot<Class> java_lang_StackTraceElement_;
     80 
     81   friend struct art::StackTraceElementOffsets;  // for verifying offset information
     82   DISALLOW_IMPLICIT_CONSTRUCTORS(StackTraceElement);
     83 };
     84 
     85 }  // namespace mirror
     86 }  // namespace art
     87 
     88 #endif  // ART_RUNTIME_MIRROR_STACK_TRACE_ELEMENT_H_
     89