Mercurial > hg > truffle
annotate src/share/vm/code/scopeDesc.hpp @ 1616:38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
Reviewed-by: dcubed, kvn, twisti
| author | never |
|---|---|
| date | Mon, 21 Jun 2010 14:26:17 -0700 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 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()); | |
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42 _bci = buffer.read_bci(); |
| 0 | 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 | |
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55 ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset, bool reexecute, bool return_oop); |
| 0 | 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.) | |
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60 ScopeDesc(const nmethod* code, int decode_offset, bool reexecute, bool return_oop); |
| 0 | 61 |
| 62 // JVM state | |
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63 methodHandle method() const { return _method; } |
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64 int bci() const { return _bci; } |
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65 bool should_reexecute() const { return _reexecute; } |
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66 bool return_oop() const { return _return_oop; } |
| 0 | 67 |
| 68 GrowableArray<ScopeValue*>* locals(); | |
| 69 GrowableArray<ScopeValue*>* expressions(); | |
| 70 GrowableArray<MonitorValue*>* monitors(); | |
| 71 GrowableArray<ScopeValue*>* objects(); | |
| 72 | |
| 73 // Stack walking, returns NULL if this is the outer most scope. | |
| 74 ScopeDesc* sender() const; | |
| 75 | |
| 76 // Returns where the scope was decoded | |
| 77 int decode_offset() const { return _decode_offset; } | |
| 78 | |
| 79 // Tells whether sender() returns NULL | |
| 80 bool is_top() const; | |
| 81 // Tells whether sd is equal to this | |
| 82 bool is_equal(ScopeDesc* sd) const; | |
| 83 | |
| 84 private: | |
| 85 // Alternative constructor | |
| 86 ScopeDesc(const ScopeDesc* parent); | |
| 87 | |
| 88 // JVM state | |
| 89 methodHandle _method; | |
| 90 int _bci; | |
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91 bool _reexecute; |
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92 bool _return_oop; |
| 0 | 93 |
| 94 // Decoding offsets | |
| 95 int _decode_offset; | |
| 96 int _sender_decode_offset; | |
| 97 int _locals_decode_offset; | |
| 98 int _expressions_decode_offset; | |
| 99 int _monitors_decode_offset; | |
| 100 | |
| 101 // Object pool | |
| 102 GrowableArray<ScopeValue*>* _objects; | |
| 103 | |
| 104 // Nmethod information | |
| 105 const nmethod* _code; | |
| 106 | |
| 107 // Decoding operations | |
| 108 void decode_body(); | |
| 109 GrowableArray<ScopeValue*>* decode_scope_values(int decode_offset); | |
| 110 GrowableArray<MonitorValue*>* decode_monitor_values(int decode_offset); | |
| 111 GrowableArray<ScopeValue*>* decode_object_values(int decode_offset); | |
| 112 | |
| 113 DebugInfoReadStream* stream_at(int decode_offset) const; | |
| 114 | |
| 115 | |
| 116 public: | |
| 117 // Verification | |
| 118 void verify(); | |
| 119 | |
| 120 #ifndef PRODUCT | |
| 121 public: | |
| 122 // Printing support | |
| 123 void print_on(outputStream* st) const; | |
| 124 void print_on(outputStream* st, PcDesc* pd) const; | |
| 125 void print_value_on(outputStream* st) const; | |
| 126 #endif | |
| 127 }; |