IJ54626: JVM UNEXPECTEDLY TERMINATES ON WINDOWS

APAR status

• Closed as program error.

Error description

• Error Message: When running on Windows with control flow guard
  enabled the JVM may stop unexpectedly. None of the usual crash
  data is generated.
  .
  Stack Trace: N/A
  .
  

Local fix

• The problem can be avoided by any of:
  Use -Xrs on the JVM command line
  Use -Xjit:disableTraps on the JVM command line
  Disable control flow guard
  

Problem summary

• As part of Microsoft's control flow guard technology a check is
  made that the stack pointer points to a valid range of the C
  stack on returning from a signal handler. This is incompatible
  with the normal operation of the JVM which may call a signal
  handler while the stack pointer is pointing to the Java stack
  (this being unknown to the operating system and not within the C
  stack area). As a result CFG terminates the process without
  opportunity to generate the usual crash data.
  

Problem conclusion

• The JVM has been updated to detect whether Microsoft's CFG is
  enabled. If CFG is active, the JVM will operate without relying
  on signal handlers during normal execution, resolving the
  conflict.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtimes
     21              21.0.7.0
     17              17.0.15.0
     11              11.0.27.0
  IBM SDK, Java Technology Edition
     8    SR8 FP50  (8.0.8.50)
  .
  Downloads and supplementary documentation can be found at the
  following locations:
  - For non z/OS operating systems:
    - IBM Semeru Runtimes, Version 11 and later
      https://www.ibm.com/semeru-runtimes/downloads/
    - IBM SDK, Java Technology Edition, Version 8
      https://www.ibm.com/support/pages/java-sdk-downloads/
  - For the z/OS operating system:
    - Java SDK Products on z/OS
      https://www.ibm.com/support/pages/java-sdk-products-zos
  

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

  JIT

• Fixed component ID

  620700124

Applicable component levels