Using IPCS commands

The Interactive Problem Control System (IPCS) is a tool provided in z/OS® to help you diagnose software failures. IPCS provides formatting and analysis support for dumps and traces produced by z/OS.

Here are some sample IPCS commands that you might find useful during your debugging sessions. In this case, the address space of interest is ASID(x'7D').
ip verbx ledata 'nthreads(*)'
This command provides the stack traces for the TCBs in the dump.
ip setd asid(x'007d')
This command is to set the default ASID; for example, to set the default asid to x'007d'.
ip verbx ledata 'all,asid(007d),tcb(tttttt)'
In this command, the all report formats out key LE control blocks such as CAA, PCB, ZMCH, CIB. In particular, the CIB/ZMCH captures the PSW and GPRs at the time the program check occurred.
ip verbx ledata 'cee,asid(007d),tcb(tttttt)'
This command formats out the traceback for one specific thread.
ip summ regs asid(x'007d')
This command formats out the TCB/RB structure for the address space. It is rarely useful for JVM debugging.
ip verbx sumdump
Then issue find 'slip regs sa' to locate the GPRs and PSW at the time a SLIP TRAP is matched. This command is useful for the case where you set a SA (Storage Alter) trap to catch an overlay of storage.
ip omvsdata process detail asid(x'007d')
This command generates a report for the process showing the thread status from a USS kernel perspective. It requires the USS kernel address space memory to be available in the dump, therefore it works only for SVC dumps, not TDUMPs.
ip select all
This command generates a list of the address spaces in the system at the time of the dump, so that you can tie up the ASID with the JOBNAME.
ip systrace asid(x'007d') time(gmt)
This command formats out the system trace entries for all threads in this address space. It is useful for diagnosing loops. time(gmt) converts the TOD Clock entries in the system trace to a human readable form.

For further information about IPCS, see the z/OS documentation (z/OS V1R7.0 MVS IPCS Commands).