Mercurial > hg > graal-jvmci-8
comparison src/share/vm/code/scopeDesc.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 9987d9d5eb0e |
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1 /* | |
2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // SimpleScopeDesc is used when all you need to extract from | |
26 // a given pc,nmethod pair is a methodOop and a bci. This is | |
27 // quite a bit faster than allocating a full ScopeDesc, but | |
28 // very limited in abilities. | |
29 | |
30 class SimpleScopeDesc : public StackObj { | |
31 private: | |
32 methodOop _method; | |
33 int _bci; | |
34 | |
35 public: | |
36 SimpleScopeDesc(nmethod* code,address pc) { | |
37 PcDesc* pc_desc = code->pc_desc_at(pc); | |
38 assert(pc_desc != NULL, "Must be able to find matching PcDesc"); | |
39 DebugInfoReadStream buffer(code, pc_desc->scope_decode_offset()); | |
40 int ignore_sender = buffer.read_int(); | |
41 _method = methodOop(buffer.read_oop()); | |
42 _bci = buffer.read_bci(); | |
43 } | |
44 | |
45 methodOop method() { return _method; } | |
46 int bci() { return _bci; } | |
47 }; | |
48 | |
49 // ScopeDescs contain the information that makes source-level debugging of | |
50 // nmethods possible; each scopeDesc describes a method activation | |
51 | |
52 class ScopeDesc : public ResourceObj { | |
53 public: | |
54 // Constructor | |
55 ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset); | |
56 | |
57 // Calls above, giving default value of "serialized_null" to the | |
58 // "obj_decode_offset" argument. (We don't use a default argument to | |
59 // avoid a .hpp-.hpp dependency.) | |
60 ScopeDesc(const nmethod* code, int decode_offset); | |
61 | |
62 // JVM state | |
63 methodHandle method() const { return _method; } | |
64 int bci() const { return _bci; } | |
65 | |
66 GrowableArray<ScopeValue*>* locals(); | |
67 GrowableArray<ScopeValue*>* expressions(); | |
68 GrowableArray<MonitorValue*>* monitors(); | |
69 GrowableArray<ScopeValue*>* objects(); | |
70 | |
71 // Stack walking, returns NULL if this is the outer most scope. | |
72 ScopeDesc* sender() const; | |
73 | |
74 // Returns where the scope was decoded | |
75 int decode_offset() const { return _decode_offset; } | |
76 | |
77 // Tells whether sender() returns NULL | |
78 bool is_top() const; | |
79 // Tells whether sd is equal to this | |
80 bool is_equal(ScopeDesc* sd) const; | |
81 | |
82 private: | |
83 // Alternative constructor | |
84 ScopeDesc(const ScopeDesc* parent); | |
85 | |
86 // JVM state | |
87 methodHandle _method; | |
88 int _bci; | |
89 | |
90 // Decoding offsets | |
91 int _decode_offset; | |
92 int _sender_decode_offset; | |
93 int _locals_decode_offset; | |
94 int _expressions_decode_offset; | |
95 int _monitors_decode_offset; | |
96 | |
97 // Object pool | |
98 GrowableArray<ScopeValue*>* _objects; | |
99 | |
100 // Nmethod information | |
101 const nmethod* _code; | |
102 | |
103 // Decoding operations | |
104 void decode_body(); | |
105 GrowableArray<ScopeValue*>* decode_scope_values(int decode_offset); | |
106 GrowableArray<MonitorValue*>* decode_monitor_values(int decode_offset); | |
107 GrowableArray<ScopeValue*>* decode_object_values(int decode_offset); | |
108 | |
109 DebugInfoReadStream* stream_at(int decode_offset) const; | |
110 | |
111 | |
112 public: | |
113 // Verification | |
114 void verify(); | |
115 | |
116 #ifndef PRODUCT | |
117 public: | |
118 // Printing support | |
119 void print_on(outputStream* st) const; | |
120 void print_on(outputStream* st, PcDesc* pd) const; | |
121 void print_value_on(outputStream* st) const; | |
122 #endif | |
123 }; |