Mercurial > hg > graal-compiler
annotate src/share/vm/prims/jvmtiRedefineClassesTrace.hpp @ 3917:eca1193ca245
4965777: GC changes to support use of discovered field for pending references
Summary: If and when the reference handler thread is able to use the discovered field to link reference objects in its pending list, so will GC. In that case, GC will scan through this field once a reference object has been placed on the pending list, but not scan that field before that stage, as the field is used by the concurrent GC thread to link discovered objects. When ReferenceHandleR thread does not use the discovered field for the purpose of linking the elements in the pending list, as would be the case in older JDKs, the JVM will fall back to the old behaviour of using the next field for that purpose.
Reviewed-by: jcoomes, mchung, stefank
| author | ysr |
|---|---|
| date | Wed, 07 Sep 2011 13:55:42 -0700 |
| parents | f95d63e2154a |
| children | 8d9fc28831cc |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2003, 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_PRIMS_JVMTIREDEFINECLASSESTRACE_HPP |
| 26 #define SHARE_VM_PRIMS_JVMTIREDEFINECLASSESTRACE_HPP | |
| 27 | |
| 0 | 28 // RedefineClasses tracing support via the TraceRedefineClasses |
| 29 // option. A bit is assigned to each group of trace messages. | |
| 30 // Groups of messages are individually selectable. We have to use | |
| 31 // decimal values on the command line since the command option | |
| 32 // parsing logic doesn't like non-decimal numerics. The HEX values | |
| 33 // are used in the actual RC_TRACE() calls for sanity. To achieve | |
| 34 // the old cumulative behavior, pick the level after the one in | |
| 35 // which you are interested and subtract one, e.g., 33554431 will | |
| 36 // print every tracing message. | |
| 37 // | |
| 38 // 0x00000000 | 0 - default; no tracing messages | |
| 39 // 0x00000001 | 1 - name each target class before loading, after | |
| 40 // loading and after redefinition is completed | |
| 41 // 0x00000002 | 2 - print info if parsing, linking or | |
| 42 // verification throws an exception | |
| 43 // 0x00000004 | 4 - print timer info for the VM operation | |
| 44 // 0x00000008 | 8 - print subclass counter updates | |
| 45 // 0x00000010 | 16 - unused | |
| 46 // 0x00000020 | 32 - unused | |
| 47 // 0x00000040 | 64 - unused | |
| 48 // 0x00000080 | 128 - unused | |
| 49 // 0x00000100 | 256 - previous class weak reference addition | |
| 50 // 0x00000200 | 512 - previous class weak reference mgmt during | |
| 51 // class unloading checks (GC) | |
| 52 // 0x00000400 | 1024 - previous class weak reference mgmt during | |
| 53 // add previous ops (GC) | |
| 54 // 0x00000800 | 2048 - previous class breakpoint mgmt | |
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55 // 0x00001000 | 4096 - detect calls to obsolete methods |
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56 // 0x00002000 | 8192 - fail a guarantee() in addition to detection |
| 0 | 57 // 0x00004000 | 16384 - unused |
| 58 // 0x00008000 | 32768 - old/new method matching/add/delete | |
| 59 // 0x00010000 | 65536 - impl details: CP size info | |
| 60 // 0x00020000 | 131072 - impl details: CP merge pass info | |
| 61 // 0x00040000 | 262144 - impl details: CP index maps | |
| 62 // 0x00080000 | 524288 - impl details: modified CP index values | |
| 63 // 0x00100000 | 1048576 - impl details: vtable updates | |
| 64 // 0x00200000 | 2097152 - impl details: itable updates | |
| 65 // 0x00400000 | 4194304 - impl details: constant pool cache updates | |
| 66 // 0x00800000 | 8388608 - impl details: methodComparator info | |
| 67 // 0x01000000 | 16777216 - impl details: nmethod evolution info | |
| 68 // 0x02000000 | 33554432 - impl details: annotation updates | |
| 69 // 0x04000000 | 67108864 - impl details: StackMapTable updates | |
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70 // 0x08000000 | 134217728 - impl details: OopMapCache updates |
| 0 | 71 // 0x10000000 | 268435456 - unused |
| 72 // 0x20000000 | 536870912 - unused | |
| 73 // 0x40000000 | 1073741824 - unused | |
| 74 // 0x80000000 | 2147483648 - unused | |
| 75 // | |
| 76 // Note: The ResourceMark is to cleanup resource allocated args. | |
| 77 // The "while (0)" is so we can use semi-colon at end of RC_TRACE(). | |
| 78 #define RC_TRACE(level, args) \ | |
| 79 if ((TraceRedefineClasses & level) != 0) { \ | |
| 80 ResourceMark rm; \ | |
| 81 tty->print("RedefineClasses-0x%x: ", level); \ | |
| 82 tty->print_cr args; \ | |
| 83 } while (0) | |
| 84 | |
| 85 #define RC_TRACE_WITH_THREAD(level, thread, args) \ | |
| 86 if ((TraceRedefineClasses & level) != 0) { \ | |
| 87 ResourceMark rm(thread); \ | |
| 88 tty->print("RedefineClasses-0x%x: ", level); \ | |
| 89 tty->print_cr args; \ | |
| 90 } while (0) | |
| 91 | |
| 92 #define RC_TRACE_MESG(args) \ | |
| 93 { \ | |
| 94 ResourceMark rm; \ | |
| 95 tty->print("RedefineClasses: "); \ | |
| 96 tty->print_cr args; \ | |
| 97 } while (0) | |
| 98 | |
| 99 // Macro for checking if TraceRedefineClasses has a specific bit | |
| 100 // enabled. Returns true if the bit specified by level is set. | |
| 101 #define RC_TRACE_ENABLED(level) ((TraceRedefineClasses & level) != 0) | |
| 102 | |
| 103 // Macro for checking if TraceRedefineClasses has one or more bits | |
| 104 // set in a range of bit values. Returns true if one or more bits | |
| 105 // is set in the range from low..high inclusive. Assumes that low | |
| 106 // and high are single bit values. | |
| 107 // | |
| 108 // ((high << 1) - 1) | |
| 109 // Yields a mask that removes bits greater than the high bit value. | |
| 110 // This algorithm doesn't work with highest bit. | |
| 111 // ~(low - 1) | |
| 112 // Yields a mask that removes bits lower than the low bit value. | |
| 113 #define RC_TRACE_IN_RANGE(low, high) \ | |
| 114 (((TraceRedefineClasses & ((high << 1) - 1)) & ~(low - 1)) != 0) | |
| 115 | |
| 116 // Timer support macros. Only do timer operations if timer tracing | |
| 117 // is enabled. The "while (0)" is so we can use semi-colon at end of | |
| 118 // the macro. | |
| 119 #define RC_TIMER_START(t) \ | |
| 120 if (RC_TRACE_ENABLED(0x00000004)) { \ | |
| 121 t.start(); \ | |
| 122 } while (0) | |
| 123 #define RC_TIMER_STOP(t) \ | |
| 124 if (RC_TRACE_ENABLED(0x00000004)) { \ | |
| 125 t.stop(); \ | |
| 126 } while (0) | |
| 1972 | 127 |
| 128 #endif // SHARE_VM_PRIMS_JVMTIREDEFINECLASSESTRACE_HPP |