Now there are a lot of log tags [1], and it looks like many more will be added. I start to wonder what 'ihop' or 'rt' would do ...
Would it make sense to add help information that can be printed to the user, like
#define LOG_TAG_LIST \
LOG_TAG(alloc, "this prints something about alloc") \
LOG_TAG(age, "blah blah") \
$ java -Xlog:help=alloc
alloc - this prints something about alloc
$ java -Xlog:help=all
alloc - this prints something about alloc
age - blah blah
-----------------
[1] The list of log tags as of today in jdk9/hs-rt/hotspot
#define LOG_TAG_LIST \
LOG_TAG(alloc) \
LOG_TAG(age) \
LOG_TAG(barrier) \
LOG_TAG(bot) \
LOG_TAG(census) \
LOG_TAG(classhisto) \
LOG_TAG(classinit) \
LOG_TAG(comp) \
LOG_TAG(compaction) \
LOG_TAG(cpu) \
LOG_TAG(cset) \
LOG_TAG(defaultmethods) \
LOG_TAG(ergo) \
LOG_TAG(exceptions) \
LOG_TAG(exit) \
LOG_TAG(freelist) \
LOG_TAG(gc) \
LOG_TAG(heap) \
LOG_TAG(humongous) \
LOG_TAG(ihop) \
LOG_TAG(jni) \
LOG_TAG(liveness) \
LOG_TAG(logging) \
LOG_TAG(marking) \
LOG_TAG(metaspace) \
LOG_TAG(monitorinflation) \
LOG_TAG(phases) \
LOG_TAG(plab) \
LOG_TAG(promotion) \
LOG_TAG(ref) \
LOG_TAG(refine) \
LOG_TAG(region) \
LOG_TAG(remset) \
LOG_TAG(rt) \
LOG_TAG(safepoint) \
LOG_TAG(scavenge) \
LOG_TAG(scrub) \
LOG_TAG(start) \
LOG_TAG(state) \
LOG_TAG(stats) \
LOG_TAG(stringdedup) \
LOG_TAG(survivor) \
LOG_TAG(svc) \
LOG_TAG(sweep) \
LOG_TAG(task) \
LOG_TAG(tlab) \
LOG_TAG(time) \
LOG_TAG(verify) \
LOG_TAG(vmoperation)
Would it make sense to add help information that can be printed to the user, like
#define LOG_TAG_LIST \
LOG_TAG(alloc, "this prints something about alloc") \
LOG_TAG(age, "blah blah") \
$ java -Xlog:help=alloc
alloc - this prints something about alloc
$ java -Xlog:help=all
alloc - this prints something about alloc
age - blah blah
-----------------
[1] The list of log tags as of today in jdk9/hs-rt/hotspot
#define LOG_TAG_LIST \
LOG_TAG(alloc) \
LOG_TAG(age) \
LOG_TAG(barrier) \
LOG_TAG(bot) \
LOG_TAG(census) \
LOG_TAG(classhisto) \
LOG_TAG(classinit) \
LOG_TAG(comp) \
LOG_TAG(compaction) \
LOG_TAG(cpu) \
LOG_TAG(cset) \
LOG_TAG(defaultmethods) \
LOG_TAG(ergo) \
LOG_TAG(exceptions) \
LOG_TAG(exit) \
LOG_TAG(freelist) \
LOG_TAG(gc) \
LOG_TAG(heap) \
LOG_TAG(humongous) \
LOG_TAG(ihop) \
LOG_TAG(jni) \
LOG_TAG(liveness) \
LOG_TAG(logging) \
LOG_TAG(marking) \
LOG_TAG(metaspace) \
LOG_TAG(monitorinflation) \
LOG_TAG(phases) \
LOG_TAG(plab) \
LOG_TAG(promotion) \
LOG_TAG(ref) \
LOG_TAG(refine) \
LOG_TAG(region) \
LOG_TAG(remset) \
LOG_TAG(rt) \
LOG_TAG(safepoint) \
LOG_TAG(scavenge) \
LOG_TAG(scrub) \
LOG_TAG(start) \
LOG_TAG(state) \
LOG_TAG(stats) \
LOG_TAG(stringdedup) \
LOG_TAG(survivor) \
LOG_TAG(svc) \
LOG_TAG(sweep) \
LOG_TAG(task) \
LOG_TAG(tlab) \
LOG_TAG(time) \
LOG_TAG(verify) \
LOG_TAG(vmoperation)
- relates to
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JDK-8150894 Unused -Xlog tag sequences are silently ignored.
-
- Resolved
-
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JDK-8145024 Require LOG_ prefix to all Unified Logging tags in the source code
-
- Closed
-