From COMS 4157 Advanced Systems Programming

Malloctupus: A Memory Allocator Library

Assignment | Repo
A custom memory allocator library in C

• Implicit free list allocator
• Explicit free list
• Segregated free list

Greptile: Multi-Threaded grep

Assignment | Repo
Multi-threaded command-line search tool

• POSIX regex matching
• Directory traversal, handling file permissions, symlinks, and hidden files
• Multi-threaded parallelization

Cowchat: A Chat Server

Assignment | Repo
Multi-room, real-time chat server and client application

• Socket networking and protocol parsing
• Multi-client server concurrency with poll and select
• State management and broadcast routing

Ladebug: A Rudimentary Debugger

Assignment | Repo
Functional, scriptable command-line debugger, a subset of gdb

• Process control and tracing via ptrace system call
• Register inspection and software breakpoints by replacing instruction with interrupt opcode
• ELF Symbol table parsing and scripted automation

Seald: A Simple Linker

Assignment | Repo
Static linker, subset of ld

• ELF object file parsing
• Symbol resolution and global symbol table across different source files
• Object relocation and executable layout calculation

Zookeeper: A Container Manager

Zookeeper | Repo

• Namespace isolation and virtualization
• File system permissions and resource limits with cgruops
• System call filtering via seccomp