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@mike-myers-tob
mike-myers-tob / Working GDB on macOS 11.md
Last active May 21, 2025 14:15
Steps to get GDB actually working in April 2021 on macOS (Intel x86-64 only)

Debug with GDB on macOS 11

The big reason to do this is that LLDB has no ability to "follow-fork-mode child", in other words, a multi-process target that doesn't have a single-process mode (or, a bug that only manifests when in multi-process mode) is going to be difficult or impossible to debug, especially if you have to run the target over and over in order to make the bug manifest. If you have a repeatable bug, no big deal, break on the fork from the parent process and attach to the child in a second lldb instance. Otherwise, read on.

Install GDB

Don't make the mistake of thinking you can just brew install gdb. Currently this is version 10.2 and it's mostly broken, with at least two annoying bugs as of April 29th 2021, but the big one is https://sourceware.org/bugzilla/show_bug.cgi?id=24069

$ xcode-select install  # install the XCode command-line tools
@Barakat
Barakat / pdburl.py
Created January 26, 2020 10:30
Locating PDB file URL in Microsoft Symbol Server
#!python3
import pefile
SYMBOLS_SERVER = 'https://msdl.microsoft.com/download/symbols'
def main():
pe = pefile.PE('C:/Windows/System32/kernel32.dll', fast_load=True)
pe.parse_data_directories()
for directory in pe.DIRECTORY_ENTRY_DEBUG:
@RussellCollins
RussellCollins / example_permission_setter.sh
Created December 2, 2015 08:56
Set write and read external storage permission prior to a test run so that a screenshot on fail listener can work on device targets running Android 6.0+
SDK=`adb shell getprop ro.build.version.sdk | tr -d '\r'`
echo "Device SDK level is: " $SDK
if (( "$SDK" >= 23 )) ; then
echo "Enabling read and write external storage permissions before running tests on Android 6.0+"
adb shell pm grant com.replace.with.your.app.package android.permission.WRITE_EXTERNAL_STORAGE
adb shell pm grant com.replace.with.your.app.package android.permission.READ_EXTERNAL_STORAGE
fi
@karpathy
karpathy / min-char-rnn.py
Last active March 5, 2026 03:44
Minimal character-level language model with a Vanilla Recurrent Neural Network, in Python/numpy
"""
Minimal character-level Vanilla RNN model. Written by Andrej Karpathy (@karpathy)
BSD License
"""
import numpy as np
# data I/O
data = open('input.txt', 'r').read() # should be simple plain text file
chars = list(set(data))
data_size, vocab_size = len(data), len(chars)