36 #include CPU_HEADER(jniTypes)
37
38 // A JavaCallWrapper is constructed before each JavaCall and destructed after the call.
39 // Its purpose is to allocate/deallocate a new handle block and to save/restore the last
40 // Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.
41
42 class JavaCallWrapper: StackObj {
43 friend class VMStructs;
44 private:
45 JavaThread* _thread; // the thread to which this call belongs
46 JNIHandleBlock* _handles; // the saved handle block
47 Method* _callee_method; // to be able to collect arguments if entry frame is top frame
48 oop _receiver; // the receiver of the call (if a non-static call)
49
50 JavaFrameAnchor _anchor; // last thread anchor state that we must restore
51
52 JavaValue* _result; // result value
53
54 public:
55 // Construction/destruction
56 JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS);
57 ~JavaCallWrapper();
58
59 // Accessors
60 JavaThread* thread() const { return _thread; }
61 JNIHandleBlock* handles() const { return _handles; }
62
63 JavaFrameAnchor* anchor(void) { return &_anchor; }
64
65 JavaValue* result() const { return _result; }
66 // GC support
67 Method* callee_method() { return _callee_method; }
68 oop receiver() { return _receiver; }
69 void oops_do(OopClosure* f);
70
71 bool is_first_frame() const { return _anchor.last_Java_sp() == NULL; }
72
73 };
74
75
76 // Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args)
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36 #include CPU_HEADER(jniTypes)
37
38 // A JavaCallWrapper is constructed before each JavaCall and destructed after the call.
39 // Its purpose is to allocate/deallocate a new handle block and to save/restore the last
40 // Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.
41
42 class JavaCallWrapper: StackObj {
43 friend class VMStructs;
44 private:
45 JavaThread* _thread; // the thread to which this call belongs
46 JNIHandleBlock* _handles; // the saved handle block
47 Method* _callee_method; // to be able to collect arguments if entry frame is top frame
48 oop _receiver; // the receiver of the call (if a non-static call)
49
50 JavaFrameAnchor _anchor; // last thread anchor state that we must restore
51
52 JavaValue* _result; // result value
53
54 public:
55 // Construction/destruction
56 JavaCallWrapper(const methodHandle& callee_method, Handle receiver, JavaValue* result, TRAPS);
57 ~JavaCallWrapper();
58
59 // Accessors
60 JavaThread* thread() const { return _thread; }
61 JNIHandleBlock* handles() const { return _handles; }
62
63 JavaFrameAnchor* anchor(void) { return &_anchor; }
64
65 JavaValue* result() const { return _result; }
66 // GC support
67 Method* callee_method() { return _callee_method; }
68 oop receiver() { return _receiver; }
69 void oops_do(OopClosure* f);
70
71 bool is_first_frame() const { return _anchor.last_Java_sp() == NULL; }
72
73 };
74
75
76 // Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args)
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