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Do not create the opcache shm mapping too close to the heap #14793

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Do not create the opcache shm mapping too close to the heap #14793

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Commits on Jul 3, 2024

  1. Fix the JIT buffer relocation failure at the corner case (php#11266) 

    Avoid missing possible candidates due to the large address range of the free segment.
Eg, 

48000000-49400000 r-xs 08000000 00:0f 39322841               segment1
7ffff2ec8000-7ffff2f49000 rw-p 00000000 00:00 0              segment2
7ffff6fae000-7ffff735c000 r-xp 00200000 08:02 11538515       /usr/local/sbin/php-fpm

original code will miss the opportunity between [7ffff2ec** - 7ffff2ec8000].

Fix issue php#11265.

Signed-off-by: Long, Tao <tao.long@intel.com>
Signed-off-by: Dmitry Stogov <dmitrystogov@gmail.com>
    @LoongT4o @arnaud-lb
    LoongT4o authored and arnaud-lb committed Jul 3, 2024
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Commits on Jul 5, 2024

  1. Hint the opcache shm mapping location only when JIT is enabled

    @arnaud-lb
    arnaud-lb committed Jul 5, 2024
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