Mon, 28 Feb 2011 06:07:12 -0800
7012914: JSR 292 MethodHandlesTest C1: frame::verify_return_pc(return_address) failed: must be a return pc
Reviewed-by: never, bdelsart
1 /*
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25 #ifndef SHARE_VM_CODE_PCDESC_HPP
26 #define SHARE_VM_CODE_PCDESC_HPP
28 #include "memory/allocation.hpp"
30 // PcDescs map a physical PC (given as offset from start of nmethod) to
31 // the corresponding source scope and byte code index.
33 class nmethod;
35 class PcDesc VALUE_OBJ_CLASS_SPEC {
36 friend class VMStructs;
37 private:
38 int _pc_offset; // offset from start of nmethod
39 int _scope_decode_offset; // offset for scope in nmethod
40 int _obj_decode_offset;
42 union PcDescFlags {
43 int word;
44 struct {
45 unsigned int reexecute: 1;
46 unsigned int is_method_handle_invoke: 1;
47 unsigned int return_oop: 1;
48 } bits;
49 bool operator ==(const PcDescFlags& other) { return word == other.word; }
50 } _flags;
52 public:
53 int pc_offset() const { return _pc_offset; }
54 int scope_decode_offset() const { return _scope_decode_offset; }
55 int obj_decode_offset() const { return _obj_decode_offset; }
57 void set_pc_offset(int x) { _pc_offset = x; }
58 void set_scope_decode_offset(int x) { _scope_decode_offset = x; }
59 void set_obj_decode_offset(int x) { _obj_decode_offset = x; }
61 // Constructor (only used for static in nmethod.cpp)
62 // Also used by ScopeDesc::sender()]
63 PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset);
65 enum {
66 // upper and lower exclusive limits real offsets:
67 lower_offset_limit = -1,
68 upper_offset_limit = (unsigned int)-1 >> 1
69 };
71 // Flags
72 bool should_reexecute() const { return _flags.bits.reexecute; }
73 void set_should_reexecute(bool z) { _flags.bits.reexecute = z; }
75 // Does pd refer to the same information as pd?
76 bool is_same_info(const PcDesc* pd) {
77 return _scope_decode_offset == pd->_scope_decode_offset &&
78 _obj_decode_offset == pd->_obj_decode_offset &&
79 _flags == pd->_flags;
80 }
82 bool is_method_handle_invoke() const { return _flags.bits.is_method_handle_invoke; }
83 void set_is_method_handle_invoke(bool z) { _flags.bits.is_method_handle_invoke = z; }
85 bool return_oop() const { return _flags.bits.return_oop; }
86 void set_return_oop(bool z) { _flags.bits.return_oop = z; }
88 // Returns the real pc
89 address real_pc(const nmethod* code) const;
91 void print(nmethod* code);
92 bool verify(nmethod* code);
93 };
95 #endif // SHARE_VM_CODE_PCDESC_HPP