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:
GetDeclaringClass()33   String* GetDeclaringClass() REQUIRES_SHARED(Locks::mutator_lock_) {
34     return GetFieldObject<String>(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, declaring_class_));
35   }
36 
GetMethodName()37   String* GetMethodName() REQUIRES_SHARED(Locks::mutator_lock_) {
38     return GetFieldObject<String>(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, method_name_));
39   }
40 
GetFileName()41   String* GetFileName() REQUIRES_SHARED(Locks::mutator_lock_) {
42     return GetFieldObject<String>(OFFSET_OF_OBJECT_MEMBER(StackTraceElement, file_name_));
43   }
44 
GetLineNumber()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_);
GetStackTraceElement()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