Restart process when pcov or tideways extension is loaded

.github/workflows/e2e-tests.yml

@@ -2028,6 +2028,23 @@ jobs:
               ../bashunit -a contains 'Foo.php:11:Instantiated class Ds\Vector not found.' "$OUTPUT"
               ../bashunit -a contains 'Bar.php:15:Call to an undefined method Ds\Pair<string, int>::copy().' "$OUTPUT"
               ../bashunit -a not_contains 'Ds\Seq' "$OUTPUT"
+          - script: |
+              echo "<?php echo 'Hello 1';" > test.php
+              XDEBUG_HANDLER_DEBUG=1 bin/phpstan analyse test.php 2>&1 | tee -a output.txt
+              e2e/bashunit -a file_contains output.txt "Process restarting"
+            coverage: "pcov"
+          - script: |
+              echo "<?php echo 'Hello 2';" > test.php
+              XDEBUG_HANDLER_DEBUG=1 bin/phpstan analyse test.php 2>&1 | tee -a output.txt
+              e2e/bashunit -a file_contains output.txt "Process restarting"
+            coverage: "pcov"
+            ini-values: "pcov.enabled=1"
+          - script: |
+              echo "<?php echo 'Hello 3';" > test.php
+              XDEBUG_HANDLER_DEBUG=1 bin/phpstan analyse test.php 2>&1 | tee -a output.txt
+              e2e/bashunit -a file_not_contains output.txt "Process restarting"
+            coverage: "pcov"
+            ini-values: "pcov.enabled=0"
 
     steps:
       - name: Harden the runner (Audit all outbound calls)
@@ -2041,7 +2058,8 @@ jobs:
       - name: "Install PHP"
         uses: "shivammathur/setup-php@eb7c497e18156a6bbabfef1d3a82760b9eda3962" # 2.40.0
         with:
-          coverage: "none"
+          coverage: ${{ matrix.coverage || 'none' }}
+          ini-values: ${{ matrix.ini-values || '' }}
           php-version: "8.2"
           tools: ${{ matrix.tools }}
           extensions: ${{ matrix.extensions }}

src/Command/CommandHelper.php

@@ -3,7 +3,6 @@
 namespace PHPStan\Command;
 
 use Composer\Semver\Semver;
-use Composer\XdebugHandler\XdebugHandler;
 use Nette\DI\Helpers;
 use Nette\DI\InvalidConfigurationException;
 use Nette\DI\ServiceCreationException;
@@ -32,6 +31,7 @@
 use PHPStan\Internal\DirectoryCreator;
 use PHPStan\Internal\DirectoryCreatorException;
 use PHPStan\Process\ForkedChildCrashReporter;
+use PHPStan\Process\ProcessRestarter;
 use PHPStan\ShouldNotHappenException;
 use ReflectionClass;
 use Symfony\Component\Console\Input\InputInterface;
@@ -104,22 +104,22 @@ public static function begin(
 		$errorOutput = new SymfonyOutput($symfonyErrorOutput, new SymfonyStyle(new ErrorsConsoleStyle($input, $symfonyErrorOutput)));
 
 		if (!$allowXdebug) {
-			$xdebug = new XdebugHandler('phpstan');
+			$xdebug = new ProcessRestarter('phpstan');
 			$xdebug->setPersistent();
 			$xdebug->check();
 			unset($xdebug);
 		}
 
 		if ($allowXdebug) {
-			if (!XdebugHandler::isXdebugActive()) {
+			if (!ProcessRestarter::isXdebugActive()) {
 				$errorOutput->getStyle()->note('You are running with "--xdebug" enabled, but the Xdebug PHP extension is not active. The process will not halt at breakpoints.');
 			} else {
 				$errorOutput->getStyle()->note("You are running with \"--xdebug\" enabled, and the Xdebug PHP extension is active.\nThe process will halt at breakpoints, but PHPStan will run much slower.\nUse this only if you are debugging PHPStan itself or your custom extensions.");
 			}
-		} elseif (XdebugHandler::isXdebugActive()) {
+		} elseif (ProcessRestarter::isXdebugActive()) {
 			$errorOutput->getStyle()->note('The Xdebug PHP extension is active, but "--xdebug" is not used. This may slow down performance and the process will not halt at breakpoints.');
 		} elseif ($debugEnabled) {
-			$v = XdebugHandler::getSkippedVersion();
+			$v = ProcessRestarter::getSkippedVersion();
 			if ($v !== '') {
 				$errorOutput->getStyle()->note(
 					"The Xdebug PHP extension is active, but \"--xdebug\" is not used.\n" .

src/Process/ProcessRestarter.php

@@ -0,0 +1,56 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Process;
+
+use Composer\XdebugHandler\XdebugHandler;
+use Override;
+use function count;
+use function extension_loaded;
+use function file_get_contents;
+use function file_put_contents;
+use function ini_get;
+use function preg_replace;
+use const PHP_EOL;
+
+// see https://github.com/composer/xdebug-handler/issues/174
+final class ProcessRestarter extends XdebugHandler
+{
+
+	/** @var array<string> */
+	private array $extensions = [];
+
+	#[Override]
+	protected function requiresRestart(bool $default): bool
+	{
+		// pcov has a perf impact similar to xdebug, so we want to disable it
+		if (extension_loaded('pcov') && ini_get('pcov.enabled') === '1') {
+			$this->extensions[] = 'pcov';
+		}
+
+		// tideways hooks deep in the php engine, so it can segfault when running phpstan with turbo.
+		if (extension_loaded('tideways')) {
+			$this->extensions[] = 'tideways';
+		}
+
+		return $default || count($this->extensions) > 0;
+	}
+
+	#[Override]
+	protected function restart(array $command): void
+	{
+		if (count($this->extensions) > 0) {
+			$content = file_get_contents((string) $this->tmpIni);
+
+			if ($content !== false) {
+				foreach ($this->extensions as $extension) {
+					$regex = '/^\s*((?:zend_)?extension\s*=.*' . $extension . '.*)$/mi';
+					$content = preg_replace($regex, ';$1', $content) . PHP_EOL;
+				}
+				file_put_contents((string) $this->tmpIni, $content);
+			}
+		}
+
+		parent::restart($command);
+	}
+
+}