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sj-i/ffi_callback_memory_exhaustion.php

Created February 28, 2023 14:34
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Passing a callback to PHP FFI eats up memory because some internal data is not released until the end of the request
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ffi_callback_memory_exhaustion.php
<?php
use FFI\CData;
$ffi = FFI::cdef('void qsort(void *base, size_t num, size_t size, int (*compare)(const void*, const void*));');
$arr = FFI::new('int[2]');
$arr[0] = 1;
$arr[1] = 2;
while (true) {
$ffi->qsort($arr, 2, FFI::sizeof($arr[0]), fn(CData $a, CData $b) => 0);
}
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