mirror of
https://we.phorge.it/source/arcanist.git
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e95afd1d00
Summary: Ref T13100. Ref T13586. These options have been in production for a while and seem to consistently improve behavior, downgrading segfaults to runtime errors. Make them global options for all CLI environments. See next change for web enviornments. Test Plan: Ran `arc`. Maniphest Tasks: T13586, T13100 Differential Revision: https://secure.phabricator.com/D21566
131 lines
5.1 KiB
PHP
131 lines
5.1 KiB
PHP
<?php
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function __arcanist_init_script__() {
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// Adjust the runtime language configuration to be reasonable and inline with
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// expectations. We do this first, then load libraries.
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// There may be some kind of auto-prepend script configured which starts an
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// output buffer. Discard any such output buffers so messages can be sent to
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// stdout (if a user wants to capture output from a script, there are a large
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// number of ways they can accomplish it legitimately; historically, we ran
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// into this on only one install which had some bizarre configuration, but it
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// was difficult to diagnose because the symptom is "no messages of any
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// kind").
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while (ob_get_level() > 0) {
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ob_end_clean();
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}
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error_reporting(E_ALL | E_STRICT);
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$config_map = array(
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// Always display script errors. Without this, they may not appear, which is
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// unhelpful when users encounter a problem. On the web this is a security
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// concern because you don't want to expose errors to clients, but in a
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// script context we always want to show errors.
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'display_errors' => true,
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// Send script error messages to the server's `error_log` setting.
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'log_errors' => true,
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// Set the error log to the default, so errors go to stderr. Without this
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// errors may end up in some log, and users may not know where the log is
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// or check it.
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'error_log' => null,
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// XDebug raises a fatal error if the call stack gets too deep, but the
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// default setting is 100, which we may exceed legitimately with module
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// includes (and in other cases, like recursive filesystem operations
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// applied to 100+ levels of directory nesting). Stop it from triggering:
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// we explicitly limit recursive algorithms which should be limited.
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//
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// After Feb 2014, XDebug interprets a value of 0 to mean "do not allow any
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// function calls". Previously, 0 effectively disabled this check. For
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// context, see T5027.
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'xdebug.max_nesting_level' => PHP_INT_MAX,
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// Don't limit memory, doing so just generally just prevents us from
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// processing large inputs without many tangible benefits.
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'memory_limit' => -1,
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// See T13296. On macOS under PHP 7.3.x, PCRE currently segfaults after
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// "fork()" if "pcre.jit" is enabled.
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'pcre.jit' => 0,
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// See PHI1894. This option was introduced in PHP 7.4, and removes the
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// "args" value from exception backtraces. We have some unit tests which
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// inspect "args", and this option generally obscures useful debugging
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// information without any benefit in the context of Phabricator.
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'zend.exception_ignore_args' => 0,
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// See T13100. We'd like the regex engine to fail, rather than segfault,
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// if handed a pathological regular expression.
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'pcre.backtrack_limit' => 10000,
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'pcre.recusion_limit' => 10000,
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// NOTE: Phabricator applies a similar set of startup options for Web
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// environments in "PhabricatorStartup". Changes here may also be
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// appropriate to apply there.
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);
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foreach ($config_map as $config_key => $config_value) {
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ini_set($config_key, $config_value);
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}
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$php_version = phpversion();
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$min_version = '5.5.0';
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if (version_compare($php_version, $min_version, '<')) {
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echo sprintf(
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'UPGRADE PHP: '.
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'The installed version of PHP ("%s") is too old to run Arcanist. '.
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'Update PHP to at least the minimum required version ("%s").',
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$php_version,
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$min_version);
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echo "\n";
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exit(1);
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}
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if (!ini_get('date.timezone')) {
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// If the timezone isn't set, PHP issues a warning whenever you try to parse
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// a date (like those from Git or Mercurial logs), even if the date contains
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// timezone information (like "PST" or "-0700") which makes the
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// environmental timezone setting is completely irrelevant. We never rely on
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// the system timezone setting in any capacity, so prevent PHP from flipping
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// out by setting it to a safe default (UTC) if it isn't set to some other
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// value.
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date_default_timezone_set('UTC');
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}
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// Adjust `include_path`.
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ini_set('include_path', implode(PATH_SEPARATOR, array(
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dirname(dirname(__FILE__)).'/externals/includes',
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ini_get('include_path'),
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)));
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// Disable the insanely dangerous XML entity loader by default.
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// PHP 8 deprecates this function and disables this by default; remove once
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// PHP 7 is no longer supported or a future version has removed the function
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// entirely.
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if (function_exists('libxml_disable_entity_loader')) {
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@libxml_disable_entity_loader(true);
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}
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$root = dirname(dirname(dirname(__FILE__)));
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require_once $root.'/src/init/init-library.php';
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PhutilErrorHandler::initialize();
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// If "variables_order" excludes "E", silently repair it so that $_ENV has
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// the values we expect.
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PhutilExecutionEnvironment::repairMissingVariablesOrder();
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$router = PhutilSignalRouter::initialize();
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$handler = new PhutilBacktraceSignalHandler();
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$router->installHandler('phutil.backtrace', $handler);
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$handler = new PhutilConsoleMetricsSignalHandler();
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$router->installHandler('phutil.winch', $handler);
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}
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__arcanist_init_script__();
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