PhutilBacktraceSignalHandler.php
e94f6e738e2dproduction

PhutilBacktraceSignalHandler.php
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			<?php

			/**
			* Signal handler for SIGHUP which prints the current backtrace out to a
			* file. This is particularly helpful in debugging hung/spinning processes.
			*/
			final class PhutilBacktraceSignalHandler extends PhutilSignalHandler {

			public function canHandleSignal(PhutilSignalRouter $router, $signo) {
			return ($signo === SIGHUP);
			}

			public function handleSignal(PhutilSignalRouter $router, $signo) {
			$e = new Exception();
			$pid = getmypid();
			// Some Phabricator daemons may not be attached to a terminal.
			Filesystem::writeFile(
			sys_get_temp_dir().'/phabricator_backtrace_'.$pid,
			$e->getTraceAsString());
			}

			}