RFR: 8153535: Convert TraceRedefineClasses to Unified Logging

[Robbin Ehn]

Hi all,

Please review this.

This changeset moves redefine classes tracing to UL.

Bug: https://bugs.openjdk.java.net/browse/JDK-8153535
Webrev: http://cr.openjdk.java.net/~rehn/8153535/rev_01/webrev/

Passes testsuits 
jdk/test/:jdk_jdi,hotspot/test/:hotspot_all,nsk.jvmti.testlist,nsk.jdi.testlist 
with:
-Xlog:redefine+class*=trace
(a few test won't run with extra options)

-XX:TraceRedefineClasses=xyz turns on (aliased with) 
"-Xlog:redefine+class*=info" and emits a warning.
(xyz is ignored)

Thanks!

/Robbin

Example of useage:
-Xlog:redefine+class+constantpool*=debug
-Xlog:redefine+class+load=info
-Xlog:redefine+class*=debug,redefine+class+iklass*=trace

Here is an example from a test:

[20.279s][debug][redefine,class,update,vtables     ] vtable method 
update: getOptions(()Ljava/util/Properties;), updated default = false
[20.279s][debug][redefine,class,subclass           ] updated count in 
subclass=nsk.share.jvmti.ArgumentHandler to 197
[20.279s][info ][redefine,class,load               ] redefined 
name=nsk.share.ArgumentParser, count=99 (avail_mem=6311580K)
[20.285s][trace][redefine,class,obsolete,mark      ] EMCP_cnt=8, 
obsolete_cnt=0
[20.285s][trace][redefine,class,iklass,add         ] adding previous 
version ref for nsk.share.jvmti.ArgumentHandler, EMCP_cnt=8
[20.285s][trace][redefine,class,iklass,add         ] scratch class not 
added; no methods are running
[20.285s][info ][redefine,class,update             ] adjust: 
name=nsk.share.jvmti.ArgumentHandler
[20.285s][debug][redefine,class,update,constantpool] cpc entry update: 
getAgentOptionsString(()Ljava/lang/String;)
[20.285s][info ][redefine,class,update             ] adjust: 
name=nsk.share.jvmti.ArgumentHandler
[20.285s][debug][redefine,class,update,constantpool] cpc entry update: 
<init>(([Ljava/lang/String;)V)
[20.285s][info ][redefine,class,load               ] redefined 
name=nsk.share.jvmti.ArgumentHandler, count=198 (avail_mem=6311580K)
[20.291s][trace][redefine,class,obsolete,mark      ] EMCP_cnt=3, 
obsolete_cnt=0
[20.291s][trace][redefine,class,iklass,add         ] adding previous 
version ref for nsk.share.jvmti.JVMTITest, EMCP_cnt=3
[20.291s][trace][redefine,class,iklass,add         ] scratch class not 
added; no methods are running
[20.291s][info ][redefine,class,update             ] adjust: 
name=nsk.share.jvmti.JVMTITest
[20.291s][debug][redefine,class,update,constantpool] cpc entry update: 
commonInit(([Ljava/lang/String;)[Ljava/lang/String;)
[20.291s][info ][redefine,class,load               ] redefined 
name=nsk.share.jvmti.JVMTITest, count=99 (avail_mem=6311580K)
[20.297s][trace][redefine,class,obsolete,mark      ] EMCP_cnt=3, 
obsolete_cnt=0
[20.297s][trace][redefine,class,iklass,add         ] adding previous 
version ref for nsk.share.TestBug, EMCP_cnt=3

Mapping:

RC_TRACE_MESG = "redefine, class, update" - info

0x00000001 = "redefine, class, load" - info
0x00000001 = "redefine, class, load" - debug

0x00000002 = "redefine, class, load, exceptions" - info
0x00000004 = "redefine, class, timer" - info
0x00000008 = "redefine, class, subclass" - debug

0x00000100 = "redefine, class, obsolete, mark" - trace
0x00000200 = "redefine, class, iklass, purge" - trace
0x00000400 = "redefine, class, iklass, add" - trace
0x00000800 = "redefine, class, breakpoint" - debug

0x00001000->0x00002000 = "redefine, class, obsolete" - trace
0x00001000 = "redefine, class, obsolete" - trace
0x00002000 = REMOVED

0x00004000 = "redefine, class, obsolete, metadata" - trace
0x00004000 = "redefine, class, dump" - trace

0x00008000 = "redefine, class, normalize" - trace

0x00010000 = "redefine, class, constantpool" - info
0x00020000 = "redefine, class, constantpool" - debug
0x00040000 = "redefine, class, constantpool" - trace
0x00080000 = "redefine, class, constantpool" - trace

0x00100000-0x00400000 = "redefine, class, update" - info
0x00100000 = "redefine, class, update, vtables" - debug
0x00200000 = "redefine, class, update, itables" - debug
0x00400000 = "redefine, class, update, constantpool" - debug

0x00800000 = "redefine, class, methodcomparator" - debug

0x01000000 = "redefine, class, nmethod" - debug
0x02000000 = "redefine, class, annotation" - debug
0x04000000 = "redefine, class, stackmap" - debug
0x08000000 = "redefine, class, oopmap" - debug