Hi,
After doing a lot of research, i think i just found a way to start
debugging java code on redhatlinux7.0. But still i cant run it properly.
I do this,
java -Xdebug -Djava.compiler=NONE
-Xbootclasspath/a:/vol03/jdk1.2.2/lib/tools.jar:/vol03/jdk1.2.2/jre/lib/rt.jar
-Xrunjdwp:transport=dt_socket,server=y,suspend=y
O/P is
Agent password=igh85
Listening for transport dt_socket at address: 3538
After that i start jdb in another terminal.
jdb -attach 3490
O/P is
Initializing jdb...
VM Started: No frames on the current call stack
main[1]
If i run the command next assuming that the debuging has started , the
jdb comes out and so does the program
Now can anybody explain why does this happen.
Also i had run gdb on a hung jdb. It showed a following stack trace
after issuing command where. I think the thread goes in sigsuspend.
I dont know wether this is the proper way. But sill somebody from
blackdon can have a look at it.
#0 0x400c4c82 in __sigsuspend (set=0xbffff138)
at ../sysdeps/unix/sysv/linux/sigsuspend.c:45
#1 0x401fba55 in __pthread_wait_for_restart_signal (self=0x40205180)
at pthread.c:898
#2 0x401f7d89 in pthread_cond_wait (cond=0x804e818, mutex=0x804e800)
at restart.h:34
#3 0x40087223 in condvarWait (condvar=0x804e818, mutex=0x804e800,
wtype=CONDVAR_WAIT)
at
../../../../../src/solaris/hpi/native_threads/src/condvar_md.c:121
#4 0x4008666f in sysMonitorWait (self=0x804caa8, mid=0x804e800,
millis=-1)
at
../../../../../src/solaris/hpi/native_threads/src/monitor_md.c:325
#5 0x400643e0 in monitorWait2 (ee=0x804ca28, key=1089168048, millis=-1)
at ../../../../src/share/javavm/runtime/monitor_cache.c:873
#6 0x40058660 in JVM_MonitorWait (env=0x804ca28, obj=0x804cee0,
millis=0)
at ../../../../src/share/javavm/runtime/jvm.c:1476
#7 0x4006d485 in args_done ()
from /vol03/jdk1.2.2/jre/lib/i386/classic/libjvm.so
#8 0x4003d3c2 in invokeJNINativeMethod (o=0x40eb62b0, mb=0x8097c40,
args_size=3, ee=0x804ca28)
at ../../../../src/share/javavm/runtime/classruntime.c:493
#9 0x40073ecb in ivqw_not_ijn6 ()
from /vol03/jdk1.2.2/jre/lib/i386/classic/libjvm.so
#10 0x40eb5d50 in ?? ()
#11 0x81b0ec0 in ?? ()
#12 0x40eb69c8 in ?? ()
#13 0x817aa20 in ?? ()
#14 0x40eae040 in ?? ()
#15 0x817ece0 in ?? ()
Thanks and Regards
Amol
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