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  1. JDK
  2. JDK-8169373

Work around linux NPTL stack guard error

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Details

    • Bug
    • Resolution: Fixed
    • P3
    • 9
    • 9
    • hotspot
    • None
    • b151
    • linux

    Description

      In the Linux NPTL pthread implementation the guard size mechanism is not implemented properly. The posix standard requires to add the size of the guard pages to the stack size, instead Linux takes the space out of 'stacksize'.

      The Posix standard http://pubs.opengroup.org/onlinepubs/9699919799/
      says "the implementation allocates extra memory at the overflow end of the stack". The linux man page https://linux.die.net/man/3/pthread_attr_setguardsize says "As at glibc 2.8, the NPTL threading implementation includes the guard area within the stack size allocation, rather than allocating extra space at the end of the stack, as POSIX.1 requires".

      I encounter this problem in runtime/Thread/TooSmallStackSize.java on ppc with 64K pages. _compiler_thread_min_stack_allowed is 128K on ppc, and ppc specifies two OS guard pages. The VM crashes in pthread creation because there is no usable space
      in the thread stack after allocating the guard pages.

      This fix adapts the requested stack size on Linux by the size of the guard pages to mimick proper behaviour.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8140520 segfault on solaris-amd64 with "-XX:VMThreadStackSize=1" option

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8273373 Zero: Cannot invoke JVM in primordial threads on Zero

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8280059 Incorrect glibc version is used in a comment in os_linux.cpp

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8175342 assert(InstanceKlass::cast(k)->is_initialized()) failed: need to increase java_thread_min_stack_allowed calculation

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-6675312 Linux glibc stack guard-pages can overlap with hotspot guard pages

          • P3 - Major loss of function.
          • Closed

          Enhancement - null JDK-8288631 Avoid applying Linux NPTL stack guard workaround for glibc 2.27+

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8170655 [posix] Fix minimum stack size computations

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

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              goetz Goetz Lindenmaier
              goetz Goetz Lindenmaier
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                Updated:
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