mary marchini mmarchini

new Promise
console.log

Goals

When a promise is rejected with no catch handler attached, it should:

Aborting with error code for unhandled rejection to generate core-dump
Get stack trace from the point where the error was thrown
Inspecting arguments, closures and variables

Current State

$ node benchmark/compare.js --old ./node-master --new ./node-hack-the-stack http > compare-hack-the-stack.http.csv
$ cat compare-hack-the-stack.http.csv  | Rscript benchmark/compare.R
                                                                                                confidence improvement accuracy (*)    (**)   (***)
 http/bench-parser.js n=100000 len=16                                                                          -1.17 %       ±3.73%  ±4.96%  ±6.46%
 http/bench-parser.js n=100000 len=32                                                                          -1.55 %       ±3.19%  ±4.24%  ±5.52%
 http/bench-parser.js n=100000 len=4                                                                           -2.90 %       ±4.20%  ±5.59%  ±7.27%
 http/bench-parser.js n=100000 len=8                                                                           -2.39 %       ±3.41%  ±4.54%  ±5.91%
 http/check_invalid_header_char.js n=1000000 input=''

	# Uncomment deb-src lines on /etc/apt/sources.list
	sudo apt-get update

	# Or replace ~/glibc with preferred path to store libc source
	mkdir -p ~/glibc
	cd ~/glibc

	sudo apt-get install -y dpkg-dev
	sudo apt-get build-deps libc6
	apt-get source libc6

	// Node v10.15.3
	uprobe:/home/mmarchini/.nvm/versions/node/v10.15.3/bin/node:_ZN2v88internal17Builtin_JsonParseEiPPNS0_6ObjectEPNS0_7IsolateE
	{
	// Load constants
	$kPointerSize = (uint32)(1 << (*uaddr("v8dbg_PointerSizeLog2")));
	$stringLengthOffset = (uint32)*uaddr("v8dbg_class_String__length__SMI");
	$kTag = (uint32)*uaddr("v8dbg_HeapObjectTag");
	$kTagMask = (uint32)*uaddr("v8dbg_SmiTagMask");
	$kShiftSize = (uint32)*uaddr("v8dbg_SmiShiftSize");

	$ make LDFLAGS=-static NO_PERF_READ_VDSO32=1 NO_PERF_READ_VDSOX32=1 NO_JVMTI=1
	BUILD: Doing 'make -j8' parallel build
	HOSTCC fixdep.o
	HOSTLD fixdep-in.o
	LINK fixdep

	Auto-detecting system features:
	... dwarf: [ on ]
	... dwarf_getlocations: [ on ]
	... glibc: [ on ]

	(lldb) target create "/home/mmarchini/.nvm/versions/node/v12.3.0/bin/node" --core "core.frame-scenario.1"
	Core file '/home/mmarchini/workspace/nodejs/llnode/core.frame-scenario.1' (x86_64) was loaded.
	(lldb) plugin load '/home/mmarchini/workspace/nodejs/llnode/llnode.so'
	(lldb) settings set prompt '(llnode) '
	(llnode) command script import diagnose_unwind
	bind: Invalid command `enable-meta-key'.
	The "diagnose-unwind" command has been installed, type "help diagnose-unwind" for detailed help.
	(llnode) diagnose-unwind
	LLDB version lldb version 6.0.1
	Unwind diagnostics for thread 1

	#include <v8.h>
	#include <v8-postmortem.h>
	#include <napi.h>
	#include <lldb/API/SBDebugger.h>
	#include <lldb/API/SBTarget.h>
	#include <lldb/API/SBProcess.h>

	#include <iostream>

	using lldb::addr_t;

	'use strict';

	const http = require('http');
	const port = 3000;

	class Visit {
	constructor(visit_id, headers) {
	this.visit_id = visit_id;
	this.headers = headers;
	}

	#!/usr/bin/env zsh

	local LAMBDA="%(?,%{$fg_bold[green]%}λ,%{$fg_bold[red]%}λ)"

	function get_pwd(){
	git_root=$PWD
	while [[ $git_root != / && ! -e $git_root/.git ]]; do
	git_root=$git_root:h
	done
	if [[ $git_root = / ]]; then