Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiRedefineClassesTrace.hpp @ 452:00b023ae2d78
6722113: CMS: Incorrect overflow handling during precleaning of Reference lists
Summary: When we encounter marking stack overflow during precleaning of Reference lists, we were using the overflow list mechanism, which can cause problems on account of mutating the mark word of the header because of conflicts with mutator accesses and updates of that field. Instead we should use the usual mechanism for overflow handling in concurrent phases, namely dirtying of the card on which the overflowed object lies. Since precleaning effectively does a form of discovered list processing, albeit with discovery enabled, we needed to adjust some code to be correct in the face of interleaved processing and discovery.
Reviewed-by: apetrusenko, jcoomes
| author | ysr |
|---|---|
| date | Thu, 20 Nov 2008 12:27:41 -0800 |
| parents | d1605aabd0a1 |
| children | 70998f2e05ef |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 2003-2008 Sun Microsystems, Inc. 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 * | |
| 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 // RedefineClasses tracing support via the TraceRedefineClasses | |
| 26 // option. A bit is assigned to each group of trace messages. | |
| 27 // Groups of messages are individually selectable. We have to use | |
| 28 // decimal values on the command line since the command option | |
| 29 // parsing logic doesn't like non-decimal numerics. The HEX values | |
| 30 // are used in the actual RC_TRACE() calls for sanity. To achieve | |
| 31 // the old cumulative behavior, pick the level after the one in | |
| 32 // which you are interested and subtract one, e.g., 33554431 will | |
| 33 // print every tracing message. | |
| 34 // | |
| 35 // 0x00000000 | 0 - default; no tracing messages | |
| 36 // 0x00000001 | 1 - name each target class before loading, after | |
| 37 // loading and after redefinition is completed | |
| 38 // 0x00000002 | 2 - print info if parsing, linking or | |
| 39 // verification throws an exception | |
| 40 // 0x00000004 | 4 - print timer info for the VM operation | |
| 41 // 0x00000008 | 8 - print subclass counter updates | |
| 42 // 0x00000010 | 16 - unused | |
| 43 // 0x00000020 | 32 - unused | |
| 44 // 0x00000040 | 64 - unused | |
| 45 // 0x00000080 | 128 - unused | |
| 46 // 0x00000100 | 256 - previous class weak reference addition | |
| 47 // 0x00000200 | 512 - previous class weak reference mgmt during | |
| 48 // class unloading checks (GC) | |
| 49 // 0x00000400 | 1024 - previous class weak reference mgmt during | |
| 50 // add previous ops (GC) | |
| 51 // 0x00000800 | 2048 - previous class breakpoint mgmt | |
| 52 // 0x00001000 | 4096 - unused | |
| 53 // 0x00002000 | 8192 - unused | |
| 54 // 0x00004000 | 16384 - unused | |
| 55 // 0x00008000 | 32768 - old/new method matching/add/delete | |
| 56 // 0x00010000 | 65536 - impl details: CP size info | |
| 57 // 0x00020000 | 131072 - impl details: CP merge pass info | |
| 58 // 0x00040000 | 262144 - impl details: CP index maps | |
| 59 // 0x00080000 | 524288 - impl details: modified CP index values | |
| 60 // 0x00100000 | 1048576 - impl details: vtable updates | |
| 61 // 0x00200000 | 2097152 - impl details: itable updates | |
| 62 // 0x00400000 | 4194304 - impl details: constant pool cache updates | |
| 63 // 0x00800000 | 8388608 - impl details: methodComparator info | |
| 64 // 0x01000000 | 16777216 - impl details: nmethod evolution info | |
| 65 // 0x02000000 | 33554432 - impl details: annotation updates | |
| 66 // 0x04000000 | 67108864 - impl details: StackMapTable updates | |
|
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d8b3ef7ee3e5
6599425: 4/3 OopMapCache::lookup() can cause later crash or assert() failure
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changeset
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67 // 0x08000000 | 134217728 - impl details: OopMapCache updates |
| 0 | 68 // 0x10000000 | 268435456 - unused |
| 69 // 0x20000000 | 536870912 - unused | |
| 70 // 0x40000000 | 1073741824 - unused | |
| 71 // 0x80000000 | 2147483648 - unused | |
| 72 // | |
| 73 // Note: The ResourceMark is to cleanup resource allocated args. | |
| 74 // The "while (0)" is so we can use semi-colon at end of RC_TRACE(). | |
| 75 #define RC_TRACE(level, args) \ | |
| 76 if ((TraceRedefineClasses & level) != 0) { \ | |
| 77 ResourceMark rm; \ | |
| 78 tty->print("RedefineClasses-0x%x: ", level); \ | |
| 79 tty->print_cr args; \ | |
| 80 } while (0) | |
| 81 | |
| 82 #define RC_TRACE_WITH_THREAD(level, thread, args) \ | |
| 83 if ((TraceRedefineClasses & level) != 0) { \ | |
| 84 ResourceMark rm(thread); \ | |
| 85 tty->print("RedefineClasses-0x%x: ", level); \ | |
| 86 tty->print_cr args; \ | |
| 87 } while (0) | |
| 88 | |
| 89 #define RC_TRACE_MESG(args) \ | |
| 90 { \ | |
| 91 ResourceMark rm; \ | |
| 92 tty->print("RedefineClasses: "); \ | |
| 93 tty->print_cr args; \ | |
| 94 } while (0) | |
| 95 | |
| 96 // Macro for checking if TraceRedefineClasses has a specific bit | |
| 97 // enabled. Returns true if the bit specified by level is set. | |
| 98 #define RC_TRACE_ENABLED(level) ((TraceRedefineClasses & level) != 0) | |
| 99 | |
| 100 // Macro for checking if TraceRedefineClasses has one or more bits | |
| 101 // set in a range of bit values. Returns true if one or more bits | |
| 102 // is set in the range from low..high inclusive. Assumes that low | |
| 103 // and high are single bit values. | |
| 104 // | |
| 105 // ((high << 1) - 1) | |
| 106 // Yields a mask that removes bits greater than the high bit value. | |
| 107 // This algorithm doesn't work with highest bit. | |
| 108 // ~(low - 1) | |
| 109 // Yields a mask that removes bits lower than the low bit value. | |
| 110 #define RC_TRACE_IN_RANGE(low, high) \ | |
| 111 (((TraceRedefineClasses & ((high << 1) - 1)) & ~(low - 1)) != 0) | |
| 112 | |
| 113 // Timer support macros. Only do timer operations if timer tracing | |
| 114 // is enabled. The "while (0)" is so we can use semi-colon at end of | |
| 115 // the macro. | |
| 116 #define RC_TIMER_START(t) \ | |
| 117 if (RC_TRACE_ENABLED(0x00000004)) { \ | |
| 118 t.start(); \ | |
| 119 } while (0) | |
| 120 #define RC_TIMER_STOP(t) \ | |
| 121 if (RC_TRACE_ENABLED(0x00000004)) { \ | |
| 122 t.stop(); \ | |
| 123 } while (0) |