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  1. JDK
  2. JDK-8253469

ARM32 Zero: replace usages of __sync_synchronize() with OrderAccess::fence

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    • b18

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      In atomic_bsd_zero.hpp and atomic_linux_zero.hpp there are uses of __sync_synchronize(). However, orderAccess_*_zero.hpp calls the kernel helper, because:

      /*
       * ARM Kernel helper for memory barrier.
       * Using __asm __volatile ("":::"memory") does not work reliable on ARM
       * and gcc __sync_synchronize(); implementation does not use the kernel
       * helper for all gcc versions so it is unreliable to use as well.
       */

      We need to clean this up to use OrderAccess::fence().

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              shade Aleksey Shipilev
              shade Aleksey Shipilev
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