Probe OPcache from inside a PHPStan run

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: Sander Muller

.github/workflows/probe.yml

@@ -23,9 +23,16 @@ jobs:
           coverage: none
           tools: composer
       - run: (cd bench/project && composer install -q --no-interaction)
-      - name: phar as Composer installed it
-        run: php -d opcache.enable_cli=1 -d opcache.validate_timestamps=1 -d opcache.file_update_protection=0 -d opcache.max_file_size=0 probe/mtime.php bench/project/vendor/phpstan/phpstan/phpstan.phar
-      - name: default file_update_protection
-        run: php -d opcache.enable_cli=1 -d opcache.validate_timestamps=1 probe/mtime.php bench/project/vendor/phpstan/phpstan/phpstan.phar
-      - name: phar file dates
-        run: ls -la --time-style=full-iso bench/project/vendor/phpstan/phpstan/ 2>/dev/null || ls -laT bench/project/vendor/phpstan/phpstan/
+      - name: Inside PHPStan, stock / timestamps off / timestamps on
+        run: |
+          PKG=bench/project/vendor/phpstan/phpstan
+          mkdir -p "$RUNNER_TEMP/fc0" "$RUNNER_TEMP/fcv"
+          for arm in stock fc0 fcv; do cp -R $PKG "$RUNNER_TEMP/arm-$arm"; done
+          php -d phar.readonly=0 bench/make-arm.php "$RUNNER_TEMP/arm-fc0/phpstan.phar" sha512 "$RUNNER_TEMP/fc0"
+          php -d phar.readonly=0 bench/make-arm.php "$RUNNER_TEMP/arm-fcv/phpstan.phar" sha512 "$RUNNER_TEMP/fcv" vts
+          cd probe/proj
+          for arm in stock fc0 fcv; do for run in 1 2; do
+            echo "== $arm run $run"
+            php "$RUNNER_TEMP/arm-$arm/phpstan.phar" analyse -c phpstan.neon --debug --no-progress 2>&1 | grep PROBE || true
+          done; done
+          find "$RUNNER_TEMP/fcv" -name '*.bin' | wc -l

probe/proj/bootstrap.php

@@ -0,0 +1,15 @@
+<?php
+$f = (new ReflectionClass(\PHPStan\Analyser\MutatingScope::class))->getFileName();
+$st = opcache_get_status(true);
+$phar = 0; $plain = 0;
+foreach ($st['scripts'] ?? [] as $path => $_) { str_starts_with($path, 'phar://') ? $phar++ : $plain++; }
+fwrite(STDERR, 'PROBE ' . json_encode([
+	'os' => PHP_OS, 'file' => $f,
+	'stat_mtime' => @stat($f)['mtime'] ?? null,
+	'filemtime' => @filemtime($f),
+	'is_cached' => opcache_is_script_cached($f),
+	'shm_scripts_phar' => $phar, 'shm_scripts_plain' => $plain,
+	'vts' => ini_get('opcache.validate_timestamps'), 'fc' => ini_get('opcache.file_cache'),
+	'turbo' => extension_loaded('phpstan_turbo'),
+	'wrappers' => stream_get_wrappers(),
+], JSON_UNESCAPED_SLASHES) . "\n");

probe/proj/phpstan.neon

@@ -0,0 +1,4 @@
+parameters:
+    level: max
+    paths: [src]
+    bootstrapFiles: [bootstrap.php]

probe/proj/src/Foo.php

@@ -0,0 +1,3 @@
+<?php declare(strict_types = 1);
+namespace App;
+final class Foo { public function bar(int $a): int { return $a * 2; } }