Wed, 08 Apr 2009 00:12:59 -0700
6827505: sizing logic for vtable and itable stubs needs self-check
Summary: Asserts and comments to help maintain the correct sizing of certain stubs
Reviewed-by: kvn
1 /*
2 * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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25 // PcDescs map a physical PC (given as offset from start of nmethod) to
26 // the corresponding source scope and byte code index.
28 class nmethod;
30 class PcDesc VALUE_OBJ_CLASS_SPEC {
31 friend class VMStructs;
32 private:
33 int _pc_offset; // offset from start of nmethod
34 int _scope_decode_offset; // offset for scope in nmethod
35 int _obj_decode_offset;
37 public:
38 int pc_offset() const { return _pc_offset; }
39 int scope_decode_offset() const { return _scope_decode_offset; }
40 int obj_decode_offset() const { return _obj_decode_offset; }
42 void set_pc_offset(int x) { _pc_offset = x; }
43 void set_scope_decode_offset(int x) { _scope_decode_offset = x; }
44 void set_obj_decode_offset(int x) { _obj_decode_offset = x; }
46 // Constructor (only used for static in nmethod.cpp)
47 // Also used by ScopeDesc::sender()]
48 PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset);
50 enum {
51 // upper and lower exclusive limits real offsets:
52 lower_offset_limit = -1,
53 upper_offset_limit = (unsigned int)-1 >> 1
54 };
56 // Returns the real pc
57 address real_pc(const nmethod* code) const;
59 void print(nmethod* code);
60 bool verify(nmethod* code);
61 };