Mercurial > hg > truffle
annotate src/share/vm/opto/stringopts.hpp @ 6972:bd7a7ce2e264
6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Mon, 12 Nov 2012 14:03:53 -0800 |
| parents | 8f972594effc |
| children |
| rev | line source |
|---|---|
| 1080 | 1 /* |
| 6057 | 2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. |
| 1080 | 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. |
| 1080 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_OPTO_STRINGOPTS_HPP |
| 26 #define SHARE_VM_OPTO_STRINGOPTS_HPP | |
| 27 | |
| 28 #include "opto/node.hpp" | |
| 29 #include "opto/phaseX.hpp" | |
| 30 | |
| 1080 | 31 class StringConcat; |
| 32 | |
| 33 class PhaseStringOpts : public Phase { | |
| 34 friend class StringConcat; | |
| 35 | |
| 36 private: | |
| 37 PhaseGVN* _gvn; | |
| 38 | |
| 39 // List of dead nodes to clean up aggressively at the end | |
| 40 Unique_Node_List dead_worklist; | |
| 41 | |
| 42 // Memory slices needed for code gen | |
| 43 int char_adr_idx; | |
| 44 | |
| 45 // Integer.sizeTable - used for int to String conversion | |
| 46 ciField* size_table_field; | |
| 47 | |
| 48 // A set for use by various stages | |
| 49 VectorSet _visited; | |
| 50 | |
| 51 // Collect a list of all SB.toString calls | |
| 52 Node_List collect_toString_calls(); | |
| 53 | |
| 54 // Examine the use of the SB alloc to see if it can be replace with | |
| 55 // a single string construction. | |
| 56 StringConcat* build_candidate(CallStaticJavaNode* call); | |
| 57 | |
| 58 // Replace all the SB calls in concat with an optimization String allocation | |
| 59 void replace_string_concat(StringConcat* concat); | |
| 60 | |
| 61 // Load the value of a static field, performing any constant folding. | |
| 62 Node* fetch_static_field(GraphKit& kit, ciField* field); | |
| 63 | |
| 64 // Compute the number of characters required to represent the int value | |
| 65 Node* int_stringSize(GraphKit& kit, Node* value); | |
| 66 | |
| 67 // Copy the characters representing value into char_array starting at start | |
| 68 void int_getChars(GraphKit& kit, Node* value, Node* char_array, Node* start, Node* end); | |
| 69 | |
| 70 // Copy of the contents of the String str into char_array starting at index start. | |
| 71 Node* copy_string(GraphKit& kit, Node* str, Node* char_array, Node* start); | |
| 72 | |
| 73 // Clean up any leftover nodes | |
| 74 void record_dead_node(Node* node); | |
| 75 void remove_dead_nodes(); | |
| 76 | |
| 77 PhaseGVN* gvn() { return _gvn; } | |
| 78 | |
| 79 enum { | |
| 80 // max length of constant string copy unrolling in copy_string | |
| 81 unroll_string_copy_length = 6 | |
| 82 }; | |
| 83 | |
| 84 public: | |
| 85 PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist); | |
| 86 }; | |
| 1972 | 87 |
| 88 #endif // SHARE_VM_OPTO_STRINGOPTS_HPP |