1 /* 2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_PRIMS_JVMTIREDEFINECLASSESTRACE_HPP 26 #define SHARE_VM_PRIMS_JVMTIREDEFINECLASSESTRACE_HPP 27 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 55 // 0x00001000 | 4096 - detect calls to obsolete methods 56 // 0x00002000 | 8192 - fail a guarantee() in addition to detection 57 // 0x00004000 | 16384 - detect old/obsolete methods in metadata 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 70 // 0x08000000 | 134217728 - impl details: OopMapCache updates 71 // 0x10000000 | 268435456 - unused 72 // 0x20000000 | 536870912 - unused 73 // 0x40000000 | 1073741824 - unused 74 // 0x80000000 | 2147483648 - unused 75 76 // Macro for checking if TraceRedefineClasses has a specific bit 77 // enabled. Returns true if the bit specified by level is set. 78 #define RC_TRACE_ENABLED(level) ((TraceRedefineClasses & level) != 0) 79 80 // Macro for checking if TraceRedefineClasses has one or more bits 81 // set in a range of bit values. Returns true if one or more bits 82 // is set in the range from low..high inclusive. Assumes that low 83 // and high are single bit values. 84 // 85 // ((high << 1) - 1) 86 // Yields a mask that removes bits greater than the high bit value. 87 // This algorithm doesn't work with highest bit. 88 // ~(low - 1) 89 // Yields a mask that removes bits lower than the low bit value. 90 #define RC_TRACE_IN_RANGE(low, high) \ 91 (((TraceRedefineClasses & ((high << 1) - 1)) & ~(low - 1)) != 0) 92 93 // Note: The ResourceMark is to cleanup resource allocated args. 94 // The "do {...} while (0)" is so we can use semi-colon at end of RC_TRACE(). 95 #define RC_TRACE(level, args) do { \ 96 if (RC_TRACE_ENABLED(level)) { \ 97 ResourceMark rm; \ 98 tty->print("RedefineClasses-0x%x: ", level); \ 99 tty->print_cr args; \ 100 } \ 101 } while (0) 102 103 #define RC_TRACE_NO_CR(level, args) do { \ 104 if (RC_TRACE_ENABLED(level)) { \ 105 ResourceMark rm; \ 106 tty->print("RedefineClasses-0x%x: ", level); \ 107 tty->print args; \ 108 } \ 109 } while (0) 110 111 #define RC_TRACE_WITH_THREAD(level, thread, args) do { \ 112 if (RC_TRACE_ENABLED(level)) { \ 113 ResourceMark rm(thread); \ 114 tty->print("RedefineClasses-0x%x: ", level); \ 115 tty->print_cr args; \ 116 } \ 117 } while (0) 118 119 #define RC_TRACE_MESG(args) do { \ 120 ResourceMark rm; \ 121 tty->print("RedefineClasses: "); \ 122 tty->print_cr args; \ 123 } while (0) 124 125 // Timer support macros. Only do timer operations if timer tracing is enabled. 126 // The "do {...} while (0)" is so we can use semi-colon at end of the macro. 127 #define RC_TIMER_START(t) do { \ 128 if (RC_TRACE_ENABLED(0x00000004)) { \ 129 t.start(); \ 130 } \ 131 } while (0) 132 #define RC_TIMER_STOP(t) do { \ 133 if (RC_TRACE_ENABLED(0x00000004)) { \ 134 t.stop(); \ 135 } \ 136 } while (0) 137 138 #endif // SHARE_VM_PRIMS_JVMTIREDEFINECLASSESTRACE_HPP 139