#!/bin/bash

function p_invoke() {
	valgrind --tool=callgrind                         \
		--trace-children=yes                          \
		--callgrind-out-file=/tmp/callgrind.out.%p    \
		--cache-sim=yes                               \
		--instr-atstart=no                            \
		/nginx/objs/nginx                             \
			-e /tmp/error.log                         \
			-c /nginx.conf                            \
			-g "daemon off;"
}

function invoke() {
	/nginx/objs/nginx     \
		-e /tmp/error.log \
		-c /nginx.conf    \
		-g "daemon off;"  \
		$@
}

function sigint_handler() {
	echo "sigint received. trigger again to kill."
	invoke -s quit
	trap - INT
}

function sigcont_handler() {
	echo "sigcont received. reloading nginx."
	invoke -s reload
}

trap 'sigint_handler' INT
trap 'sigcont_handler' CONT

# enable tracing
echo 1 > /proc/sys/kernel/yama/ptrace_scope

p_invoke &

wait
echo "NGINX down. waiting to find it again"
sleep 0.5
wait $(cat /tmp/pid)
echo "NGINX is GONE. waiting until signalled"
sleep infinity