Load opcache extension if it is loadable

src/Psalm/Internal/Fork/PsalmRestarter.php

@@ -2,19 +2,28 @@
 
 namespace Psalm\Internal\Fork;
 
+use Composer\XdebugHandler\Process;
 use Composer\XdebugHandler\XdebugHandler;
 
 use function array_filter;
 use function array_merge;
 use function array_splice;
+use function defined;
 use function extension_loaded;
+use function fgets;
 use function file_get_contents;
 use function file_put_contents;
+use function function_exists;
 use function implode;
 use function in_array;
 use function ini_get;
+use function is_resource;
 use function preg_replace;
+use function proc_close;
+use function proc_open;
+use function trim;
 
+use const PHP_BINARY;
 use const PHP_VERSION_ID;
 
 /**
@@ -23,6 +32,7 @@ use const PHP_VERSION_ID;
 class PsalmRestarter extends XdebugHandler
 {
     private bool $required = false;
+    private ?bool $needOPcache = null;
 
     /**
      * @var string[]
@@ -40,6 +50,41 @@ class PsalmRestarter extends XdebugHandler
         $this->disabled_extensions = array_merge($this->disabled_extensions, $disable_extensions);
     }
 
+    /**
+     * Returns true if the opcache extension is not currently loaded and *can* be loaded.
+     */
+    private function canAndNeedToLoadOpcache(): bool
+    {
+        if (function_exists('opcache_get_status')) {
+            return false;
+        }
+        if ($this->needOPcache !== null) {
+            return $this->needOPcache;
+        }
+        $cmd = [PHP_BINARY, '-n', '-dzend_extension=opcache', '-r', 'var_dump(function_exists("opcache_get_status"));'];
+
+        if (PHP_VERSION_ID >= 70400) {
+            $cmd = $cmd;
+        } else {
+            $cmd = Process::escapeShellCommand($cmd);
+            if (defined('PHP_WINDOWS_VERSION_BUILD')) {
+                // Outer quotes required on cmd string below PHP 8
+                $cmd = '"'.$cmd.'"';
+            }
+        }
+
+        $process = proc_open($cmd, [['pipe', 'r'], ['pipe', 'w'], ['pipe', 'w']], $pipes);
+        $this->needOPcache =
+            isset($pipes[1])
+            && trim(fgets($pipes[1]) ?: '') === 'bool(true)';
+
+        if (is_resource($process)) {
+            proc_close($process);
+        }
+
+        return $this->needOPcache;
+    }
+
     /**
      * No type hint to allow xdebug-handler v1 and v2 usage
      *
@@ -53,23 +98,25 @@ class PsalmRestarter extends XdebugHandler
             static fn(string $extension): bool => extension_loaded($extension)
         );
 
-        if (PHP_VERSION_ID >= 8_00_00 && (extension_loaded('opcache') || extension_loaded('Zend OPcache'))) {
+        if ($this->canAndNeedToLoadOpcache()) {
-            // restart to enable JIT if it's not configured in the optimal way
+            return true;
-            if (!in_array(ini_get('opcache.enable_cli'), ['1', 'true', true, 1])) {
+        }
-                return true;
-            }
 
-            if (((int) ini_get('opcache.jit')) !== 1205) {
+        // restart to enable JIT if it's not configured in the optimal way
-                return true;
+        if (!in_array(ini_get('opcache.enable_cli'), ['1', 'true', true, 1])) {
-            }
+            return true;
+        }
 
-            if (((int) ini_get('opcache.jit')) === 0) {
+        if (((int) ini_get('opcache.jit')) !== 1205) {
-                return true;
+            return true;
-            }
+        }
 
-            if (ini_get('opcache.optimization_level') !== '0x7FFEBFFF') {
+        if (((int) ini_get('opcache.jit')) === 0) {
-                return true;
+            return true;
-            }
+        }
+
+        if (ini_get('opcache.optimization_level') !== '0x7FFEBFFF') {
+            return true;
         }
 
         return $default || $this->required;
@@ -92,28 +139,27 @@ class PsalmRestarter extends XdebugHandler
             file_put_contents($this->tmpIni, $content);
         }
 
-        $additional_options = [];
-
-        // executed in the parent process (before restart)
-        // if it wasn't loaded then we apparently don't have opcache installed and there's no point trying
-        // to tweak it
-        // If we're running on 7.4 there's no JIT available
-        if (PHP_VERSION_ID >= 8_00_00 && (extension_loaded('opcache') || extension_loaded('Zend OPcache'))) {
-            $additional_options = [
-                '-dopcache.enable_cli=true',
-                '-dopcache.jit_buffer_size=512M',
-                '-dopcache.jit=1205',
-                '-dopcache.optimization_level=0x7FFEBFFF',
-            ];
-        }
-
         array_splice(
             $command,
             1,
             0,
-            $additional_options,
+            [
+                '-dopcache.enable_cli=true',
+                '-dopcache.jit_buffer_size=512M',
+                '-dopcache.jit=1205',
+                '-dopcache.optimization_level=0x7FFEBFFF',
+            ],
         );
 
+        if ($this->canAndNeedToLoadOpcache()) {
+            array_splice(
+                $command,
+                1,
+                0,
+                ['-dzend_extension=opcache'],
+            );
+        }
+
         parent::restart($command);
     }
 }