APAR status
Closed as program error.
Error description
Error Message: None . Stack Trace: The GPF appears to be a branch to a bad address, from libjava.so::getBoottime(). bp: 0x0000005098cfb580 pc: 0x00000000153b9766 ExtraSymbolsModule::CELQHROD+0x266 bp: 0x0000005098cfb780 pc: 0xbaadf00ddeadbeef libjsig.so::j9copyright+0xbaadefbd2440052f bp: 0x0000005098cfb8c0 pc: 0x000000007c71cb90 /java/java11_bit64_sr16_fp0/J11.0_64/lib/libjava.so::getBoottime +0xb0 bp: 0x0000005098cfb9c0 pc: 0x000000007c71cc6c /java/java11_bit64_sr16_fp0/J11.0_64/lib/libjava.so::os_initNati ve+0x24 bp: 0x0000005098cfbac0 pc: 0x000000007c71bc6c /java/java11_bit64_sr16_fp0/J11.0_64/lib/libjava.so::Java_java_l ang_ProcessHandleImpl_initNative+0x74 bp: 0x0000005098cfbbc0 pc: 0x000000007c800b70 /java/java11_bit64_sr16_fp0/J11.0_64/lib/default/libj9vm29.so::F FISYS+0x570 bp: 0x0000005098cfc280 pc: 0x000000007cb18c82 ExtraSymbolsModule::ffi_call+0x56a bp: 0x0000005098cfc380 pc: 0x000000007c93f1f2 /java/java11_bit64_sr16_fp0/J11.0_64/lib/default/libj9vm29.so::b ytecodeLoopCompressed+0x28692 bp: 0x0000005098cfcbc0 pc: 0x000000007c800176 /java/java11_bit64_sr16_fp0/J11.0_64/lib/default/libj9vm29.so::c _cInterpreter+0x7e bp: 0x0000005098cfd140 pc: 0x000000007c80b5d6 /java/java11_bit64_sr16_fp0/J11.0_64/lib/default/libj9vm29.so::s endClinit+0x54e .
Local fix
Problem summary
The availability of proc/stat file and the value of bootTime in the file are suspected to be the reason for crash and handling of the same in ProcessHandleImpl_zos.c file has fixed the issue
Problem conclusion
The code had adapted getBootTime() to z/OS by calling fgets() instead of getline(). But it missed a detail i.e., NULL cannot be passed as the first argument to fgets() (which getline() does accept). It either needs to allocate line on the stack or heap. So the completion of the z/OS adaptation of getBoottime() is done by stack allocating line and also not calling free() on it, because it is allocated on the stack . This APAR will be fixed in the following Releases: . IBM Semeru Runtimes 11 11.0.19.0 . Contact your IBM Product's Service Team for these Service Refreshes and Fix Packs. For those running stand-alone, information about the available maintenance can be found at: https://www.ibm.com/support/pages/java-sdk
Temporary fix
Comments
APAR Information
APAR number
IJ46958
Reported component name
OPENJDK CLASS L
Reported component ID
621800100
Reported release
B00
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2023-05-24
Closed date
2023-06-01
Last modified date
2023-06-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
OPENJDK CLASS L
Fixed component ID
621800100
Applicable component levels
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSNVBF","label":"Runtimes for Java Technology"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]
Document Information
Modified date:
02 June 2023