IV78992: JVM CRASHES ON 32-BIT LINUX X86 PLATFORM BECAUSE THE STACK POINT ER IS NOT 16-BYTE ALIGNED

APAR status

• Closed as program error.

Error description

• Error Message: A GPF event is received.
  .
  Stack Trace: At the time of failing, the EIP register points to
  an MMX instruction and the ESP register is not 16-byte aligned:
  
          (gdb) x/i 0xd4736dee
          0xd4736dee:     movapd %xmm3,0x20(%esp)
  
          (gdb) info registers
          ......
          esp            0xf7474c28       0xf7474c28
          eip            0xd4736dee       0xd4736dee
          ......
  .
  

Local fix

Problem summary

• The problem is caused when a native library requires the stack
  point to be 16-byte aligned but it is called by JVM without a
  properly aligned stack pointer.
  

Problem conclusion

• The JVM has been updated to ensure the stack pointer is 16-byte
  aligned when it calls external native libraries.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR2 FP10  (8.0.2.10)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  Service Refreshes and Fix Packs can be found at:
             https://www.ibm.com/developerworks/java/jdk/
  

Temporary fix

Comments

APAR Information

• 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

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R270 PSY

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