Oleg Elifantiev Olegas

Debugging & Profiling Node.js - Moved! Click here to be redirected to the new location.

The prep-script.sh will setup the latest Node and install the latest perf version on your Linux box.

When you want to generate the flame graph, run the following (folder locations taken from install script):

sudo sysctl kernel.kptr_restrict=0
# May also have to do the following:
# (additional reading http://unix.stackexchange.com/questions/14227/do-i-need-root-admin-permissions-to-run-userspace-perf-tool-perf-events-ar )
sudo sysctl kernel.perf_event_paranoid=0

	#!/bin/sh
	#
	# This hook does two things:
	#
	# 1. update the "info" files that allow the list of references to be
	# queries over dumb transports such as http
	#
	# 2. if this repository looks like it is a non-bare repository, and
	# the checked-out branch is pushed to, then update the working copy.
	# This makes "push" function somewhat similarly to darcs and bzr.

	$ cat test.js
	function foo () { while (true) { } }
	function bar () { return foo(); }
	bar();
	$ node test.js &
	$ gdb attach $(pidof node)
	0x00000bf778c63d5f in ?? ()
	(gdb) b v8::internal::Runtime_StackGuard
	Breakpoint 1 at 0x84a1f0
	(gdb) print 'v8::V8::TerminateExecution'(0)