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Dump Reading. IBM Resource for Dump Reading Gary Dexter’s PDF 03.ibm.com/systems/resources/servers_es erver_zseries_zos_le_conference_pdf_sw.

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Presentation on theme: "Dump Reading. IBM Resource for Dump Reading Gary Dexter’s PDF 03.ibm.com/systems/resources/servers_es erver_zseries_zos_le_conference_pdf_sw."— Presentation transcript:

1 Dump Reading

2 IBM Resource for Dump Reading Gary Dexter’s PDF 03.ibm.com/systems/resources/servers_es erver_zseries_zos_le_conference_pdf_sw a8208.pdfhttp://www- 03.ibm.com/systems/resources/servers_es erver_zseries_zos_le_conference_pdf_sw a8208.pdf IBM’s Language Environment Page

3 Background Terms Process -Collection of Resources (LE message file, library code/data) unaffected by HLL semantics, logically independent address space Enclave -Collection of Routines(Load modules, Heap, external data) defines scope of HLL semantics, first routine is designated "main" Thread -"thread" of execution (Stack, raised conditions) share the resources of the enclaveProcessEnclaveThread Process Enclave Thread

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15 SYSUDUMP Reading Display Filter View Print Options Help SDSF OUTPUT DISPLAY CSUP004C JOB04905 DSID 108 LINE 0 COLUMNS COMMAND INPUT ===> SCROLL ===> CSR ********************************* TOP OF DATA ********************************** JOB CSUP004C STEP STEP020 TIME DATE ID = 000 COMPLETION CODE USER = 4039 REASON CODE = PSW AT ENTRY TO ABEND 078D DD3E ILC 02 INTC 000D PSW LOAD MODULE ADDRESS = 0474D000 OFFSET = 000C0D3E NAME=CEEPLPKA ASCB: 00FBA ASCB..... ASCB FWDP FBA580 BWDP FB7080 LTC SYNC ACD IOSP R01C WQI ASID A R SRMF LL5 +002A DPH F0 TCBE LDA FF16E10 RSM HASI A CSCB F70200 TSB EJS EWST..... C5DD3E45 0DC06500 JSTL ECB +005C TLCH DUMP FFD90 AFFN..... FFFF RCT TMCH ASXB FDDF8 SWCT DSP RSV SRBS LLWQ RCT LSWQ QECB MECB OUC FMCT LEVL FL2A HRE

16 Display Filter View Print Options Help SDSF OUTPUT DISPLAY CSUP004C JOB04905 DSID 108 LINE 0 COLUMNS COMMAND INPUT ===> f entry SCROLL ===> CSR ********************************* TOP OF DATA ********************************** JOB CSUP004C STEP STEP020 TIME DATE ID = 000 COMPLETION CODE USER = 4039 REASON CODE = PSW AT ENTRY TO ABEND 078D DD3E ILC 02 INTC 000D PSW LOAD MODULE ADDRESS = 0474D000 OFFSET = 000C0D3E NAME=CEEPLPKA ASCB: 00FBA ASCB..... ASCB FWDP FBA580 BWDP FB7080 LTC SYNC ACD IOSP R01C WQI

17 REGISTERS AT ENTRY TO ABEND FLOATING POINT REGISTER VALUES FPC GPR VALUES FC D B EC D2A D A45E EC 0480DC B B BA ACCESS REGISTER VALUES A0EE

18 Display Filter View Print Options Help SDSF OUTPUT DISPLAY CSUP004C JOB04905 DSID 108 LINE 2,381 COLUMNS COMMAND INPUT ===> SCROLL ===> CSR 64-BIT GPR VALUES FC D JOB CSUP004C STEP STEP020 TIME DATE ID = EC D A45E EC B B BA B B B B B 00024BA0 1900B FD CB 00024BC B B

19 Exercise 1 Run program CSU.PUBLIC.PROGRAMS(SIMPLE) Why did it abend? Look at the option card. What does the “TEST” parm do? Which COBOL instruction caused the abend? Which assembler instruction caused the abend? Find the assembled instruction in the dump. What Base/Displacement address is involved in the abend? Find Y in the dump. At abend, what are the contents of Z?

20 Exercise 2 Run program CSU.PUBLIC.PROGRAMS(SIMPLE) Why did it abend? Why isn’t there a CEEDUMP? Issue a F ENTRY to find the storage dump area. Which instruction caused the abend? What fields are involved? What are the contents of the fields? Find the SAVE area in the dump. Find the literal pool in the dump.

21 Exercise 3 Run program CEE3DMP. Find the BLW and offset for x, y, and z Find these fields in the CEEDUMP. Which assembler instruction caused the dump? Which COBOL instruction caused the dump?

22 Exercise 4 Run program CEEGTST. This program acquires getmain storage. Move X, Y, and Z to the acquired storage area. Perform the arithmetic with the newly copied fields. Move the data back to regular storage and print the results.


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