Mercurial > hg > truffle
annotate src/share/vm/opto/phase.hpp @ 3249:e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer.
Reviewed-by: kvn, iveresov, never, tonyp, dholmes
| author | johnc |
|---|---|
| date | Thu, 07 Apr 2011 09:53:20 -0700 |
| parents | f95d63e2154a |
| children | ee138854b3a6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, 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 | |
| 1972 | 25 #ifndef SHARE_VM_OPTO_PHASE_HPP |
| 26 #define SHARE_VM_OPTO_PHASE_HPP | |
| 27 | |
| 28 #include "libadt/port.hpp" | |
| 29 #include "runtime/timer.hpp" | |
| 30 | |
| 0 | 31 class Compile; |
| 32 | |
| 33 //------------------------------Phase------------------------------------------ | |
| 34 // Most optimizations are done in Phases. Creating a phase does any long | |
| 35 // running analysis required, and caches the analysis in internal data | |
| 36 // structures. Later the analysis is queried using transform() calls to | |
| 37 // guide transforming the program. When the Phase is deleted, so is any | |
| 38 // cached analysis info. This basic Phase class mostly contains timing and | |
| 39 // memory management code. | |
| 40 class Phase : public StackObj { | |
| 41 public: | |
| 42 enum PhaseNumber { | |
| 43 Compiler, // Top-level compiler phase | |
| 44 Parser, // Parse bytecodes | |
| 45 Remove_Useless, // Remove useless nodes | |
| 46 Optimistic, // Optimistic analysis phase | |
| 47 GVN, // Pessimistic global value numbering phase | |
| 48 Ins_Select, // Instruction selection phase | |
| 49 CFG, // Build a CFG | |
| 418 | 50 BlockLayout, // Linear ordering of blocks |
| 0 | 51 Register_Allocation, // Register allocation, duh |
| 52 LIVE, // Dragon-book LIVE range problem | |
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53 StringOpts, // StringBuilder related optimizations |
| 0 | 54 Interference_Graph, // Building the IFG |
| 55 Coalesce, // Coalescing copies | |
| 56 Ideal_Loop, // Find idealized trip-counted loops | |
| 57 Macro_Expand, // Expand macro nodes | |
| 58 Peephole, // Apply peephole optimizations | |
| 59 last_phase | |
| 60 }; | |
| 61 protected: | |
| 62 enum PhaseNumber _pnum; // Phase number (for stat gathering) | |
| 63 | |
| 64 #ifndef PRODUCT | |
| 65 static int _total_bytes_compiled; | |
| 66 | |
| 67 // accumulated timers | |
| 68 static elapsedTimer _t_totalCompilation; | |
| 69 static elapsedTimer _t_methodCompilation; | |
| 70 static elapsedTimer _t_stubCompilation; | |
| 71 #endif | |
| 72 | |
| 73 // The next timers used for LogCompilation | |
| 74 static elapsedTimer _t_parser; | |
| 75 static elapsedTimer _t_escapeAnalysis; | |
| 76 static elapsedTimer _t_optimizer; | |
| 77 static elapsedTimer _t_idealLoop; | |
| 78 static elapsedTimer _t_ccp; | |
| 79 static elapsedTimer _t_matcher; | |
| 80 static elapsedTimer _t_registerAllocation; | |
| 81 static elapsedTimer _t_output; | |
| 82 | |
| 83 #ifndef PRODUCT | |
| 84 static elapsedTimer _t_graphReshaping; | |
| 85 static elapsedTimer _t_scheduler; | |
| 418 | 86 static elapsedTimer _t_blockOrdering; |
| 0 | 87 static elapsedTimer _t_macroExpand; |
| 88 static elapsedTimer _t_peephole; | |
| 89 static elapsedTimer _t_codeGeneration; | |
| 90 static elapsedTimer _t_registerMethod; | |
| 91 static elapsedTimer _t_temporaryTimer1; | |
| 92 static elapsedTimer _t_temporaryTimer2; | |
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93 static elapsedTimer _t_idealLoopVerify; |
| 0 | 94 |
| 95 // Subtimers for _t_optimizer | |
| 96 static elapsedTimer _t_iterGVN; | |
| 97 static elapsedTimer _t_iterGVN2; | |
| 98 | |
| 99 // Subtimers for _t_registerAllocation | |
| 100 static elapsedTimer _t_ctorChaitin; | |
| 101 static elapsedTimer _t_buildIFGphysical; | |
| 102 static elapsedTimer _t_computeLive; | |
| 103 static elapsedTimer _t_regAllocSplit; | |
| 104 static elapsedTimer _t_postAllocCopyRemoval; | |
| 105 static elapsedTimer _t_fixupSpills; | |
| 106 | |
| 107 // Subtimers for _t_output | |
| 108 static elapsedTimer _t_instrSched; | |
| 109 static elapsedTimer _t_buildOopMaps; | |
| 110 #endif | |
| 111 public: | |
| 112 Compile * C; | |
| 113 Phase( PhaseNumber pnum ); | |
| 114 #ifndef PRODUCT | |
| 115 static void print_timers(); | |
| 116 #endif | |
| 117 }; | |
| 1972 | 118 |
| 119 #endif // SHARE_VM_OPTO_PHASE_HPP |