Mercurial > hg > truffle
annotate src/share/vm/code/scopeDesc.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
| author | johnc |
|---|---|
| date | Wed, 18 Aug 2010 10:59:06 -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 }; |