Petr Sumbera 7c6f08945f Improve shared_alloc_shm.c strategy to support OPcache JIT on Solaris ...

The SysV shared memory allocator in OPcache hardcodes a maximum segment size of
32MB (SEG_ALLOC_SIZE_MAX). If the JIT buffer exceeds this, which it does with
the default 64MB size, startup will fail with "Insufficient shared memory!".

The allocator will now try allocating a contiguous buffer first, and only then
use segmentation by searching for continuously smaller powers of 2.

Fixes GH-20718
Closes GH-20719

2026-02-09 14:58:13 +01:00

4.7 KiB

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