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  1. JDK
  2. JDK-8244538

Undefined behaviour in JDK 8u HotSpot

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      In several places in HotSpot, the C++ code has Undefined Behaviour. This includes null pointer dereferences and accesses to objects outside their lifetimes.

      While many of these bugs are fixed are fixed in later releases, the changes are intrusive and extensive, and arguably too much for a stable (not to say vintage) project like OpenJDK 8. Therefore, in order to allow 8u to build on new versions of GCC we should use the following build-time options if they are available:

      -fno-lifetime-dse -fno-delete-null-pointer-checks

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. JDK-8233880 Support compilers with multi-digit major version numbers

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8034812 remove IDX_INIT macro hack in Node class

          • 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-8151841 Build needs additional flags to compile with GCC 6

          • 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-8160399 is_oop_or_null involves undefined behavior

          • 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-8164984 Improper use of is_oop in production code

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

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              sgehwolf Severin Gehwolf
              aph Andrew Haley
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