52 public:
53
54 ExceptionCache(Handle exception, address pc, address handler);
55
56 Klass* exception_type() { return _exception_type; }
57 ExceptionCache* next() { return _next; }
58 void set_next(ExceptionCache *ec) { _next = ec; }
59
60 address match(Handle exception, address pc);
61 bool match_exception_with_space(Handle exception) ;
62 address test_address(address addr);
63 bool add_address_and_handler(address addr, address handler) ;
64 };
65
66
67 // cache pc descs found in earlier inquiries
68 class PcDescCache VALUE_OBJ_CLASS_SPEC {
69 friend class VMStructs;
70 private:
71 enum { cache_size = 4 };
72 PcDesc* _pc_descs[cache_size]; // last cache_size pc_descs found
73 public:
74 PcDescCache() { debug_only(_pc_descs[0] = NULL); }
75 void reset_to(PcDesc* initial_pc_desc);
76 PcDesc* find_pc_desc(int pc_offset, bool approximate);
77 void add_pc_desc(PcDesc* pc_desc);
78 PcDesc* last_pc_desc() { return _pc_descs[0]; }
79 };
80
81
82 // nmethods (native methods) are the compiled code versions of Java methods.
83 //
84 // An nmethod contains:
85 // - header (the nmethod structure)
86 // [Relocation]
87 // - relocation information
88 // - constant part (doubles, longs and floats used in nmethod)
89 // - oop table
90 // [Code]
91 // - code body
92 // - exception handler
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52 public:
53
54 ExceptionCache(Handle exception, address pc, address handler);
55
56 Klass* exception_type() { return _exception_type; }
57 ExceptionCache* next() { return _next; }
58 void set_next(ExceptionCache *ec) { _next = ec; }
59
60 address match(Handle exception, address pc);
61 bool match_exception_with_space(Handle exception) ;
62 address test_address(address addr);
63 bool add_address_and_handler(address addr, address handler) ;
64 };
65
66
67 // cache pc descs found in earlier inquiries
68 class PcDescCache VALUE_OBJ_CLASS_SPEC {
69 friend class VMStructs;
70 private:
71 enum { cache_size = 4 };
72 // The array elements MUST be volatile! Several threads may modify
73 // and read from the cache concurrently. find_pc_desc_internal has
74 // returned wrong results. C++ compiler (namely xlC12) may duplicate
75 // C++ field accesses if the elements are not volatile.
76 typedef PcDesc* PcDescPtr;
77 volatile PcDescPtr _pc_descs[cache_size]; // last cache_size pc_descs found
78 public:
79 PcDescCache() { debug_only(_pc_descs[0] = NULL); }
80 void reset_to(PcDesc* initial_pc_desc);
81 PcDesc* find_pc_desc(int pc_offset, bool approximate);
82 void add_pc_desc(PcDesc* pc_desc);
83 PcDesc* last_pc_desc() { return _pc_descs[0]; }
84 };
85
86
87 // nmethods (native methods) are the compiled code versions of Java methods.
88 //
89 // An nmethod contains:
90 // - header (the nmethod structure)
91 // [Relocation]
92 // - relocation information
93 // - constant part (doubles, longs and floats used in nmethod)
94 // - oop table
95 // [Code]
96 // - code body
97 // - exception handler
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