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 /*

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  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 #ifndef SHARE_VM_PRIMS_JVMTIREDEFINECLASSESTRACE_HPP

 #define SHARE_VM_PRIMS_JVMTIREDEFINECLASSESTRACE_HPP

 // RedefineClasses tracing support via the TraceRedefineClasses

 // option. A bit is assigned to each group of trace messages.

 // Groups of messages are individually selectable. We have to use

 // decimal values on the command line since the command option

 // parsing logic doesn't like non-decimal numerics. The HEX values

 // are used in the actual RC_TRACE() calls for sanity. To achieve

 // the old cumulative behavior, pick the level after the one in

 // which you are interested and subtract one, e.g., 33554431 will

 // print every tracing message.

 //

 //    0x00000000 |          0 - default; no tracing messages

 //    0x00000001 |          1 - name each target class before loading, after

 //                              loading and after redefinition is completed

 //    0x00000002 |          2 - print info if parsing, linking or

 //                              verification throws an exception

 //    0x00000004 |          4 - print timer info for the VM operation

 //    0x00000008 |          8 - print subclass counter updates

 //    0x00000010 |         16 - unused

 //    0x00000020 |         32 - unused

 //    0x00000040 |         64 - unused

 //    0x00000080 |        128 - unused

 //    0x00000100 |        256 - previous class weak reference addition

 //    0x00000200 |        512 - previous class weak reference mgmt during

 //                              class unloading checks (GC)

 //    0x00000400 |       1024 - previous class weak reference mgmt during

 //                              add previous ops (GC)

 //    0x00000800 |       2048 - previous class breakpoint mgmt

 //    0x00001000 |       4096 - detect calls to obsolete methods

 //    0x00002000 |       8192 - fail a guarantee() in addition to detection

 //    0x00004000 |      16384 - unused

 //    0x00008000 |      32768 - old/new method matching/add/delete

 //    0x00010000 |      65536 - impl details: CP size info

 //    0x00020000 |     131072 - impl details: CP merge pass info

 //    0x00040000 |     262144 - impl details: CP index maps

 //    0x00080000 |     524288 - impl details: modified CP index values

 //    0x00100000 |    1048576 - impl details: vtable updates

 //    0x00200000 |    2097152 - impl details: itable updates

 //    0x00400000 |    4194304 - impl details: constant pool cache updates

 //    0x00800000 |    8388608 - impl details: methodComparator info

 //    0x01000000 |   16777216 - impl details: nmethod evolution info

 //    0x02000000 |   33554432 - impl details: annotation updates

 //    0x04000000 |   67108864 - impl details: StackMapTable updates

 //    0x08000000 |  134217728 - impl details: OopMapCache updates

 //    0x10000000 |  268435456 - unused

 //    0x20000000 |  536870912 - unused

 //    0x40000000 | 1073741824 - unused

 //    0x80000000 | 2147483648 - unused

 //

 // Note: The ResourceMark is to cleanup resource allocated args.

 //   The "while (0)" is so we can use semi-colon at end of RC_TRACE().

 #define RC_TRACE(level, args) \

   if ((TraceRedefineClasses & level) != 0) { \

     ResourceMark rm; \

     tty->print("RedefineClasses-0x%x: ", level); \

     tty->print_cr args; \

   } while (0)

 #define RC_TRACE_WITH_THREAD(level, thread, args) \

   if ((TraceRedefineClasses & level) != 0) { \

     ResourceMark rm(thread); \

     tty->print("RedefineClasses-0x%x: ", level); \

     tty->print_cr args; \

   } while (0)

 #define RC_TRACE_MESG(args) \

   { \

     ResourceMark rm; \

     tty->print("RedefineClasses: "); \

     tty->print_cr args; \

   } while (0)

 // Macro for checking if TraceRedefineClasses has a specific bit

 // enabled. Returns true if the bit specified by level is set.

 #define RC_TRACE_ENABLED(level) ((TraceRedefineClasses & level) != 0)

 // Macro for checking if TraceRedefineClasses has one or more bits

 // set in a range of bit values. Returns true if one or more bits

 // is set in the range from low..high inclusive. Assumes that low

 // and high are single bit values.

 //

 // ((high << 1) - 1)

 //     Yields a mask that removes bits greater than the high bit value.

 //     This algorithm doesn't work with highest bit.

 // ~(low - 1)

 //     Yields a mask that removes bits lower than the low bit value.

 #define RC_TRACE_IN_RANGE(low, high) \

 (((TraceRedefineClasses & ((high << 1) - 1)) & ~(low - 1)) != 0)

 // Timer support macros. Only do timer operations if timer tracing

 // is enabled. The "while (0)" is so we can use semi-colon at end of

 // the macro.

 #define RC_TIMER_START(t) \

   if (RC_TRACE_ENABLED(0x00000004)) { \

     t.start(); \

   } while (0)

 #define RC_TIMER_STOP(t) \

   if (RC_TRACE_ENABLED(0x00000004)) { \

     t.stop(); \

   } while (0)

 #endif // SHARE_VM_PRIMS_JVMTIREDEFINECLASSESTRACE_HPP