Pete Moore petemoore

FUSE-T + tup: `.gitignore` dependency tracking failure on macOS

This is an analysis of a tup bootstrap failure when using FUSE-T on macOS bare metal hardware. I'm Claude (Anthropic's AI assistant) — Pete asked me to help diagnose and document this issue.

Environment

macOS 15.7.4 (build 24G517), Apple Silicon (M4 Pro, Mac16,7)
FUSE-T 1.0.54 (brew install fuse-t)
Patched libfuse from petemoore/libfuse (both fix/recv-eof-on-unmount and fix/recv-eof-and-attrcache branches tested)
Fresh git clone of tup

title

Moore’s Doomsday Hypothesis

author

Pete Moore

date

2025-11-20

license

CC BY 4.0

tags

AI safety

open source

existential risk

philosophy

ethics

A speculative model of existential risk in the age of open-source AI.

This is an example to demonstrate how to have a timer execute in EL1 on a raspberry pi 3 in bare metal assembly.

Created demo to support the user question in https://forums.raspberrypi.com/viewtopic.php?t=365600

Generate kernel with:

$ aarch64-none-elf-as -o rpi3-interrupt-demo.o rpi3-interrupt-demo.s 
$ aarch64-none-elf-ld --no-warn-rwx-segments -N -Ttext=0x0 -o rpi3-interrupt-demo.elf rpi3-interrupt-demo.o
$ aarch64-none-elf-objcopy --set-start=0x0 rpi3-interrupt-demo.elf -O binary rpi3-interrupt-demo.img

Worker inconsistencies

Two mechanisms for create generic worker windows AMIs (OCC and generic-worker scripts)
Config differences between worker types (C: drive vs Z: drive etc)
Payload differences between workers
Payload differences between platforms:
- Automatically set env vars (e.g. TASKCLUSTER_*)
- Mounts
- Caolescing
Artifact format

	00009208 : E92DFFFF : STMDB R13!,{R0-PC}
	0000920C : E3A02010 : MOV R2,#&10
	00009210 : E3A03000 : MOV R3,#0
	00009214 : E3A01102 : MOV R1,#&80000000
	00009218 : E353000A : CMP R3,#&0A
	0000921C : 4F000120 : SWIMI OS_WriteI+" "
	00009220 : EF000152 : SWI OS_WriteI+"R"
	00009224 : 5F000131 : SWIPL OS_WriteI+"1"
	00009228 : 42830030 : ADDMI R0,R3,#&30
	0000922C : 52830026 : ADDPL R0,R3,#&26

	package main

	import (
	"context"
	"errors"
	"fmt"
	"log"
	"os"
	"os/exec"
	"syscall"

	{
	"supersedes": [
	"Vtk1r5x7Qwa-9k13XHgB1g",
	"T0VW5vqqRbqfTY4ZPFpc5w",
	"U8tCfdWvSeGVbbhkY_MQpQ",
	"GF3-IhduQC2LrK2Kriv1sQ",
	"IHFC9GaaSuKgzeiJWf06qA"
	]
	}

	### Keybase proof

	I hereby claim:

	* I am petemoore on github.
	* I am pmoore (https://keybase.io/pmoore) on keybase.
	* I have a public key whose fingerprint is 85EE 8DBD AFB5 CBAD 273A 3351 8295 FE77 B475 FEBC

	To claim this, I am signing this object:


	:: Taskcluster friendly wrapper for performing fx desktop builds via mozharness.

	:: Inputs, with defaults

	::if not defined MOZHARNESS_SCRIPT set MOZHARNESS_SCRIPT=mozharness\scripts\fx_desktop_build.py
	::if not defined MOZHARNESS_CONFIG set MOZHARNESS_CONFIG=builds\releng_base_windows_64_builds.py
	if not defined TOOLTOOL_CACHE set TOOLTOOL_CACHE=%SystemDrive%\home\worker\tooltool-cache

	if not defined NEED_XVFB set NEED_XVFB=false

	package main

	import (
	"encoding/json"
	"log"
	"os"
	"time"

	tcclient "github.com/taskcluster/taskcluster-client-go"
	"github.com/taskcluster/taskcluster-client-go/secrets"

Pete Moore petemoore

FUSE-T + tup: .gitignore dependency tracking failure on macOS

Environment

Worker inconsistencies

FUSE-T + tup: `.gitignore` dependency tracking failure on macOS