comparison src/share/vm/code/scopeDesc.hpp @ 900:9987d9d5eb0e

6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot Summary: developed a reexecute logic for the interpreter to reexecute the bytecode when deopt happens Reviewed-by: kvn, never, jrose, twisti
author cfang
date Fri, 31 Jul 2009 17:12:33 -0700
parents a61af66fc99e
children 72088be4b386
comparison
equal deleted inserted replaced
0:360d1544d7da 1:2a5b46743100
37 PcDesc* pc_desc = code->pc_desc_at(pc); 37 PcDesc* pc_desc = code->pc_desc_at(pc);
38 assert(pc_desc != NULL, "Must be able to find matching PcDesc"); 38 assert(pc_desc != NULL, "Must be able to find matching PcDesc");
39 DebugInfoReadStream buffer(code, pc_desc->scope_decode_offset()); 39 DebugInfoReadStream buffer(code, pc_desc->scope_decode_offset());
40 int ignore_sender = buffer.read_int(); 40 int ignore_sender = buffer.read_int();
41 _method = methodOop(buffer.read_oop()); 41 _method = methodOop(buffer.read_oop());
42 _bci = buffer.read_bci(); 42 bool dummy_reexecute; //only methodOop and bci are needed!
43 _bci = buffer.read_bci_and_reexecute(dummy_reexecute);
43 } 44 }
44 45
45 methodOop method() { return _method; } 46 methodOop method() { return _method; }
46 int bci() { return _bci; } 47 int bci() { return _bci; }
47 }; 48 };
58 // "obj_decode_offset" argument. (We don't use a default argument to 59 // "obj_decode_offset" argument. (We don't use a default argument to
59 // avoid a .hpp-.hpp dependency.) 60 // avoid a .hpp-.hpp dependency.)
60 ScopeDesc(const nmethod* code, int decode_offset); 61 ScopeDesc(const nmethod* code, int decode_offset);
61 62
62 // JVM state 63 // JVM state
63 methodHandle method() const { return _method; } 64 methodHandle method() const { return _method; }
64 int bci() const { return _bci; } 65 int bci() const { return _bci; }
66 bool should_reexecute() const { return _reexecute; }
65 67
66 GrowableArray<ScopeValue*>* locals(); 68 GrowableArray<ScopeValue*>* locals();
67 GrowableArray<ScopeValue*>* expressions(); 69 GrowableArray<ScopeValue*>* expressions();
68 GrowableArray<MonitorValue*>* monitors(); 70 GrowableArray<MonitorValue*>* monitors();
69 GrowableArray<ScopeValue*>* objects(); 71 GrowableArray<ScopeValue*>* objects();
84 ScopeDesc(const ScopeDesc* parent); 86 ScopeDesc(const ScopeDesc* parent);
85 87
86 // JVM state 88 // JVM state
87 methodHandle _method; 89 methodHandle _method;
88 int _bci; 90 int _bci;
91 bool _reexecute;
89 92
90 // Decoding offsets 93 // Decoding offsets
91 int _decode_offset; 94 int _decode_offset;
92 int _sender_decode_offset; 95 int _sender_decode_offset;
93 int _locals_decode_offset; 96 int _locals_decode_offset;