mrnugget

UPDATE: See "Update" below

Problem

What can cause unaligned pointers to end up on my stack? Or: what, on my stack, can look like unaligned pointers?

Context is that I'm trying to write a conservative GC. I want to scan the stack for things that look like pointers (and then mark them, but I'm not at that point yet). I copied & hacked together some code from other GCs I found, which essentially does the following:

1. At program start: save the current %rbp away as the "stack bottom" (highest address)
2. When scanning stack: save now-current %rbp away as "stack top" (lowest address)

mrnugget

begin;
  -- create two tables
  drop table if exists a;
  create table a (
    id bigserial NOT NULL primary key,
    value text
  );

  drop table if exists stats;
  create table stats (

mrnugget

Tucan - Bibliography

Majority of the resources I used to build Tucan, my toy optimizing compiler in Rust. This list is not complete but most of the things listed here are things I really read through and used.

Books

• Engineering a compiler (I use this a lot! For SSA, dominance and optimizations)
• [Static Single Assignment Book][ssabook] (I use this a lot!)
• Types And Programming Languages

mrnugget

pg_test_fsync outputs

On macOS on the 16" MBP:

pg_test_fsync
5 seconds per test
Direct I/O is not supported on this platform.

Compare file sync methods using one 8kB write:

mrnugget

name: update-circle-ci-docker-user.campaign.yaml
description: Changes the Docker Hub username used for Circle CI

# Search for repositories containing a circle-ci.yml file with the old usename
on:
  - repositoriesMatchingQuery: mydockerhub-user file:circle-ci.[yaml|yml]

# In each repository
steps:
  # replace the old with the new username in the found files

mrnugget

The following was written by Simon Korzunov

Decided to capture my thoughts in a document. The intent of this document is to be a starting point of a discussion.

So here are my recollection of thoughts/feedback on freshly added testing doc (thanks @felixfbecker!).

On goals

In general I do agree with the stated goals, but I would love to simplify/reduce number of them.

mrnugget

use std::cell::RefCell;
use std::collections::{HashMap, HashSet};
use std::fmt;

use crate::ast::*;

use super::{symbol_table::Def, Context};

#[derive(PartialEq, Eq, Copy, Clone, Debug, Hash)]
pub struct BlockId(pub usize);

mrnugget

Windows and Linux logbook

Date: December 2020

• Windows 10: time is always outdated. I have to sync time every time I reboot.

• Windows 10: login never accepts password on first try. Known problem.

• Ubuntu: can't show network activity, because my motherboard seems to be too new?

• Ubuntu: 4k display and scaling means font sizes are all over the place. Spotify is tiny. Terminal font needs to be two points smaller to match what it

mrnugget

diff --git a/parser/parser.go b/parser/parser.go
index dbd581d..c7ebdf9 100644
--- a/parser/parser.go
+++ b/parser/parser.go
@@ -114,6 +114,20 @@ func (p *Parser) expectPeek(t token.TokenType) bool {
 	}
 }
 
+func (p *Parser) expectStatementEnd() bool {
+	switch p.peekToken.Type {

mrnugget

Technical Papers

2019

1. Oct 15: Google's Bigtable paper
2. Dec 5: "Producing Wrong Data Without Doing Anything Obviously Wrong!" +

2020

1. Jan 20: "Source Code Rejuvenation is not Refactoring" +