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  1. JDK
  2. JDK-8253649

Potential bug in os::split_reserved_memory on windows

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Details

    • Bug
    • Resolution: Duplicate
    • P4
    • 17
    • 16
    • hotspot
    • None

    Description

      The code looks like this on windows:
        release_memory(base, size);
        attempt_reserve_memory_at(split, base);
        attempt_reserve_memory_at(size - split, split_address);

      After the release and before the re-reservations, another thread could reserve that memory. Investigate the effects of this.

      We've had similar bugs in the past, where memory are temporarily unmapped and non-JVM threads reserves memory in the requested area.

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. JDK-8255917 runtime/cds/SharedBaseAddress.java failed "assert(reserved_rgn != 0LL) failed: No reserved region"

          • P3 - Major loss of function.
          • Resolved
          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8255978 [windows] os::release_memory may not release the full range

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8257040 [posix] os::split_reserved_memory will not work as expected on SysV shm

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

          Enhancement - null JDK-8245035 Clean up os::split_reserved_memory()

          • 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-8256729 [windows] runtime/cds/SharedBaseAddress.java: assert on split_reserved_memory

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8256079 Heterogeneous Heap may fail silently on Windows

          • P3 - Major loss of function.
          • Closed

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            People

              minqi Yumin Qi
              stefank Stefan Karlsson
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              Dates

                Created:
                Updated:
                Resolved: