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187356fea5
Summary: Depends on D20140. Ref T13250. Currently, the top-level exception handler doesn't dump stacks because we might not be in debug mode, and we might double-extra-super fatal if we call `PhabricatorEnv:...` to try to figure out if we're in debug mode or not. We can get around this by setting a flag on the Sink once we're able to confirm that we're in debug mode. Then it's okay for the top-level error handler to show traces. There's still some small possibility that showing a trace could make us double-super-fatal since we have to call a little more code, but AphrontStackTraceView is pretty conservative about what it does and 99% of the time this is a huge improvement. Test Plan: {F6205122} Reviewers: amckinley Reviewed By: amckinley Maniphest Tasks: T13250 Differential Revision: https://secure.phabricator.com/D20142
102 lines
3.2 KiB
PHP
102 lines
3.2 KiB
PHP
<?php
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phabricator_startup();
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$fatal_exception = null;
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try {
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PhabricatorStartup::beginStartupPhase('libraries');
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PhabricatorStartup::loadCoreLibraries();
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PhabricatorStartup::beginStartupPhase('purge');
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PhabricatorCaches::destroyRequestCache();
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PhabricatorStartup::beginStartupPhase('sink');
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$sink = new AphrontPHPHTTPSink();
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// PHP introduced a "Throwable" interface in PHP 7 and began making more
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// runtime errors throw as "Throwable" errors. This is generally good, but
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// makes top-level exception handling that is compatible with both PHP 5
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// and PHP 7 a bit tricky.
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// In PHP 5, "Throwable" does not exist, so "catch (Throwable $ex)" catches
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// nothing.
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// In PHP 7, various runtime conditions raise an Error which is a Throwable
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// but NOT an Exception, so "catch (Exception $ex)" will not catch them.
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// To cover both cases, we "catch (Exception $ex)" to catch everything in
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// PHP 5, and most things in PHP 7. Then, we "catch (Throwable $ex)" to catch
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// everything else in PHP 7. For the most part, we only need to do this at
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// the top level.
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$main_exception = null;
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try {
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PhabricatorStartup::beginStartupPhase('run');
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AphrontApplicationConfiguration::runHTTPRequest($sink);
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} catch (Exception $ex) {
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$main_exception = $ex;
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} catch (Throwable $ex) {
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$main_exception = $ex;
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}
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if ($main_exception) {
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$response_exception = null;
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try {
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$response = new AphrontUnhandledExceptionResponse();
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$response->setException($main_exception);
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$response->setShowStackTraces($sink->getShowStackTraces());
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PhabricatorStartup::endOutputCapture();
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$sink->writeResponse($response);
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} catch (Exception $ex) {
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$response_exception = $ex;
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} catch (Throwable $ex) {
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$response_exception = $ex;
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}
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// If we hit a rendering exception, ignore it and throw the original
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// exception. It is generally more interesting and more likely to be
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// the root cause.
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if ($response_exception) {
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throw $main_exception;
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}
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}
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} catch (Exception $ex) {
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$fatal_exception = $ex;
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} catch (Throwable $ex) {
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$fatal_exception = $ex;
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}
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if ($fatal_exception) {
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PhabricatorStartup::didEncounterFatalException(
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'Core Exception',
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$fatal_exception,
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false);
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}
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function phabricator_startup() {
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// Load the PhabricatorStartup class itself.
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$t_startup = microtime(true);
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$root = dirname(dirname(__FILE__));
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require_once $root.'/support/startup/PhabricatorStartup.php';
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// Load client limit classes so the preamble can configure limits.
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require_once $root.'/support/startup/PhabricatorClientLimit.php';
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require_once $root.'/support/startup/PhabricatorClientRateLimit.php';
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require_once $root.'/support/startup/PhabricatorClientConnectionLimit.php';
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// If the preamble script exists, load it.
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$t_preamble = microtime(true);
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$preamble_path = $root.'/support/preamble.php';
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if (file_exists($preamble_path)) {
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require_once $preamble_path;
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}
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$t_hook = microtime(true);
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PhabricatorStartup::didStartup($t_startup);
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PhabricatorStartup::recordStartupPhase('startup.init', $t_startup);
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PhabricatorStartup::recordStartupPhase('preamble', $t_preamble);
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PhabricatorStartup::recordStartupPhase('hook', $t_hook);
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}
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