43 // be difficult to detect/recover from overflow or underflow conditions.
44 // Widening the type and making it signed will help detect these.
45 int32_t _code_length;
46 int32_t _frame_count; // Stackmap frame count
47 StackMapFrame** _frame_array;
48
49 public:
50 StackMapTable(StackMapReader* reader, StackMapFrame* init_frame,
51 u2 max_locals, u2 max_stack,
52 char* code_data, int code_len, TRAPS);
53
54 inline int32_t get_frame_count() const { return _frame_count; }
55 inline int get_offset(int index) const {
56 return _frame_array[index]->offset();
57 }
58
59 // Match and/or update current_frame to the frame in stackmap table with
60 // specified offset. Return true if the two frames match.
61 bool match_stackmap(
62 StackMapFrame* current_frame, int32_t offset,
63 bool match, bool update, ErrorContext* ctx, TRAPS) const;
64 // Match and/or update current_frame to the frame in stackmap table with
65 // specified offset and frame index. Return true if the two frames match.
66 bool match_stackmap(
67 StackMapFrame* current_frame, int32_t offset, int32_t frame_index,
68 bool match, bool update, ErrorContext* ctx, TRAPS) const;
69
70 // Check jump instructions. Make sure there are no uninitialized
71 // instances on backward branch.
72 void check_jump_target(StackMapFrame* frame, int32_t target, TRAPS) const;
73
74 // The following methods are only used inside this class.
75
76 // Returns the frame array index where the frame with offset is stored.
77 int get_index_from_offset(int32_t offset) const;
78
79 // Make sure that there's no uninitialized object exist on backward branch.
80 void check_new_object(
81 const StackMapFrame* frame, int32_t target, TRAPS) const;
82
83 void print_on(outputStream* str) const;
84 };
85
86 class StackMapStream : StackObj {
87 private:
88 Array<u1>* _data;
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43 // be difficult to detect/recover from overflow or underflow conditions.
44 // Widening the type and making it signed will help detect these.
45 int32_t _code_length;
46 int32_t _frame_count; // Stackmap frame count
47 StackMapFrame** _frame_array;
48
49 public:
50 StackMapTable(StackMapReader* reader, StackMapFrame* init_frame,
51 u2 max_locals, u2 max_stack,
52 char* code_data, int code_len, TRAPS);
53
54 inline int32_t get_frame_count() const { return _frame_count; }
55 inline int get_offset(int index) const {
56 return _frame_array[index]->offset();
57 }
58
59 // Match and/or update current_frame to the frame in stackmap table with
60 // specified offset. Return true if the two frames match.
61 bool match_stackmap(
62 StackMapFrame* current_frame, int32_t offset,
63 bool match, bool update, bool handler, ErrorContext* ctx, TRAPS) const;
64 // Match and/or update current_frame to the frame in stackmap table with
65 // specified offset and frame index. Return true if the two frames match.
66 bool match_stackmap(
67 StackMapFrame* current_frame, int32_t offset, int32_t frame_index,
68 bool match, bool update, bool handler, ErrorContext* ctx, TRAPS) const;
69
70 // Check jump instructions. Make sure there are no uninitialized
71 // instances on backward branch.
72 void check_jump_target(StackMapFrame* frame, int32_t target, TRAPS) const;
73
74 // The following methods are only used inside this class.
75
76 // Returns the frame array index where the frame with offset is stored.
77 int get_index_from_offset(int32_t offset) const;
78
79 // Make sure that there's no uninitialized object exist on backward branch.
80 void check_new_object(
81 const StackMapFrame* frame, int32_t target, TRAPS) const;
82
83 void print_on(outputStream* str) const;
84 };
85
86 class StackMapStream : StackObj {
87 private:
88 Array<u1>* _data;
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