RFR 8151939: VM_Version_init() print buffer is too small

[Coleen Phillimore]

I removed ancient logging from the signal handler and left a corrected 
comment instead.

open webrev at http://cr.openjdk.java.net/~coleenp/8151939.02/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8151939

Thanks,
Coleen

On 4/5/16 7:37 PM, Coleen Phillimore wrote:
> Summary: Increase buffer size, use logging to print out version and os 
> information
>
> This replaces several -XX:+PrintMiscellaneous -XX:+Verbose to -Xlog:os 
> or -Xlog:os+cpu.  Most use info level logging because it's only 
> printed once at the beginning, except where printing is in the signal 
> handler, which uses debug level.  Also, errors in setup use info level 
> (not warning) since they never printed the warnings before without 
> PrintMiscellaneous and Verbose.
>
> busaa027% java -Xlog:os -version
> [0.008s][info][os] SafePoint Polling address: 0x00007fde1d37f000
> [0.008s][info][os] Memory Serialize Page address: 0x00007fde1d37d000
> [0.009s][info][os] HotSpot is running with glibc 2.12, NPTL 2.12
> java version "9-internal"
> Java(TM) SE Runtime Environment (fastdebug build 
> 9-internal+0-2016-04-05-170806.cphillim.jdk9.vm-version)
> Java HotSpot(TM) 64-Bit Server VM (fastdebug build 
> 9-internal+0-2016-04-05-170806.cphillim.jdk9.vm-version-coleen, mixed 
> mode)
>
> busaa027% java -Xlog:os,os+cpu -version
> [0.008s][info][os] SafePoint Polling address: 0x00007f49c021f000
> [0.008s][info][os] Memory Serialize Page address: 0x00007f49c021d000
> [0.009s][info][os] HotSpot is running with glibc 2.12, NPTL 2.12
> [0.011s][info][os,cpu] Logical CPUs per core: 2
> [0.011s][info][os,cpu] L1 data cache line size: 64
> [0.011s][info][os,cpu] UseSSE=4  UseAVX=2  UseAES=1 
> MaxVectorSize=64Allocation prefetching: PREFETCHNTA at distance 192, 4 
> lines of 64 bytes
> [0.011s][info][os,cpu] PrefetchCopyIntervalInBytes 576
> [0.011s][info][os,cpu] PrefetchScanIntervalInBytes 576
> [0.011s][info][os,cpu] PrefetchFieldsAhead 1
> [0.011s][info][os,cpu] ContendedPaddingWidth 128
> [0.011s][info][os,cpu] CPU:total 72 (18 cores per cpu, 2 threads per 
> core) family 6 model 63 stepping 2, cmov, cx8, fxsr, mmx, sse, sse2, 
> sse3, ssse3, sse4.1, sse4.2, popcnt, avx, avx2, aes, clmul, erms, 
> lzcnt, ht, tsc, tscinvbit, bmi1, bmi2
> [0.011s][info][os,cpu] CPU Model and flags from /proc/cpuinfo:
> [0.011s][info][os,cpu] model name    : Intel(R) Xeon(R) CPU E5-2699 v3 
> @ 2.30GHz
> [0.011s][info][os,cpu] flags        : fpu vme de pse tsc msr pae mce 
> cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse 
> sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc 
> arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf 
> eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 fma 
> cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt 
> tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb 
> xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase 
> tsc_adjust bmi1 avx2 smep bmi2 erms invpcid
> java version "9-internal"
> Java(TM) SE Runtime Environment (fastdebug build 
> 9-internal+0-2016-04-05-170806.cphillim.jdk9.vm-version)
> Java HotSpot(TM) 64-Bit Server VM (fastdebug build 
> 9-internal+0-2016-04-05-170806.cphillim.jdk9.vm-version-coleen, mixed 
> mode)
>
> open webrev at http://cr.openjdk.java.net/~coleenp/8151939.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8151939
>
> Tested in rbt and jprt.
>
> Thanks,
> Coleen