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1 /* |
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2 * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 |
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25 // RedefineClasses tracing support via the TraceRedefineClasses |
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26 // option. A bit is assigned to each group of trace messages. |
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27 // Groups of messages are individually selectable. We have to use |
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28 // decimal values on the command line since the command option |
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29 // parsing logic doesn't like non-decimal numerics. The HEX values |
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30 // are used in the actual RC_TRACE() calls for sanity. To achieve |
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31 // the old cumulative behavior, pick the level after the one in |
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32 // which you are interested and subtract one, e.g., 33554431 will |
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33 // print every tracing message. |
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34 // |
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35 // 0x00000000 | 0 - default; no tracing messages |
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36 // 0x00000001 | 1 - name each target class before loading, after |
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37 // loading and after redefinition is completed |
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38 // 0x00000002 | 2 - print info if parsing, linking or |
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39 // verification throws an exception |
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40 // 0x00000004 | 4 - print timer info for the VM operation |
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41 // 0x00000008 | 8 - print subclass counter updates |
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42 // 0x00000010 | 16 - unused |
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43 // 0x00000020 | 32 - unused |
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44 // 0x00000040 | 64 - unused |
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45 // 0x00000080 | 128 - unused |
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46 // 0x00000100 | 256 - previous class weak reference addition |
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47 // 0x00000200 | 512 - previous class weak reference mgmt during |
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48 // class unloading checks (GC) |
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49 // 0x00000400 | 1024 - previous class weak reference mgmt during |
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50 // add previous ops (GC) |
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51 // 0x00000800 | 2048 - previous class breakpoint mgmt |
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52 // 0x00001000 | 4096 - unused |
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53 // 0x00002000 | 8192 - unused |
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54 // 0x00004000 | 16384 - unused |
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55 // 0x00008000 | 32768 - old/new method matching/add/delete |
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56 // 0x00010000 | 65536 - impl details: CP size info |
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57 // 0x00020000 | 131072 - impl details: CP merge pass info |
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58 // 0x00040000 | 262144 - impl details: CP index maps |
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59 // 0x00080000 | 524288 - impl details: modified CP index values |
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60 // 0x00100000 | 1048576 - impl details: vtable updates |
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61 // 0x00200000 | 2097152 - impl details: itable updates |
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62 // 0x00400000 | 4194304 - impl details: constant pool cache updates |
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63 // 0x00800000 | 8388608 - impl details: methodComparator info |
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64 // 0x01000000 | 16777216 - impl details: nmethod evolution info |
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65 // 0x02000000 | 33554432 - impl details: annotation updates |
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66 // 0x04000000 | 67108864 - impl details: StackMapTable updates |
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67 // 0x08000000 | 134217728 - unused |
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68 // 0x10000000 | 268435456 - unused |
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69 // 0x20000000 | 536870912 - unused |
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70 // 0x40000000 | 1073741824 - unused |
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71 // 0x80000000 | 2147483648 - unused |
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72 // |
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73 // Note: The ResourceMark is to cleanup resource allocated args. |
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74 // The "while (0)" is so we can use semi-colon at end of RC_TRACE(). |
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75 #define RC_TRACE(level, args) \ |
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76 if ((TraceRedefineClasses & level) != 0) { \ |
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77 ResourceMark rm; \ |
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78 tty->print("RedefineClasses-0x%x: ", level); \ |
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79 tty->print_cr args; \ |
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80 } while (0) |
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81 |
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82 #define RC_TRACE_WITH_THREAD(level, thread, args) \ |
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83 if ((TraceRedefineClasses & level) != 0) { \ |
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84 ResourceMark rm(thread); \ |
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85 tty->print("RedefineClasses-0x%x: ", level); \ |
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86 tty->print_cr args; \ |
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87 } while (0) |
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88 |
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89 #define RC_TRACE_MESG(args) \ |
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90 { \ |
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91 ResourceMark rm; \ |
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92 tty->print("RedefineClasses: "); \ |
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93 tty->print_cr args; \ |
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94 } while (0) |
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95 |
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96 // Macro for checking if TraceRedefineClasses has a specific bit |
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97 // enabled. Returns true if the bit specified by level is set. |
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98 #define RC_TRACE_ENABLED(level) ((TraceRedefineClasses & level) != 0) |
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99 |
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100 // Macro for checking if TraceRedefineClasses has one or more bits |
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101 // set in a range of bit values. Returns true if one or more bits |
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102 // is set in the range from low..high inclusive. Assumes that low |
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103 // and high are single bit values. |
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104 // |
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105 // ((high << 1) - 1) |
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106 // Yields a mask that removes bits greater than the high bit value. |
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107 // This algorithm doesn't work with highest bit. |
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108 // ~(low - 1) |
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109 // Yields a mask that removes bits lower than the low bit value. |
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110 #define RC_TRACE_IN_RANGE(low, high) \ |
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111 (((TraceRedefineClasses & ((high << 1) - 1)) & ~(low - 1)) != 0) |
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112 |
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113 // Timer support macros. Only do timer operations if timer tracing |
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114 // is enabled. The "while (0)" is so we can use semi-colon at end of |
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115 // the macro. |
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116 #define RC_TIMER_START(t) \ |
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117 if (RC_TRACE_ENABLED(0x00000004)) { \ |
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118 t.start(); \ |
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119 } while (0) |
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120 #define RC_TIMER_STOP(t) \ |
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121 if (RC_TRACE_ENABLED(0x00000004)) { \ |
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122 t.stop(); \ |
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123 } while (0) |