Welcome to My Malloc

Task

Create your own implementation of the malloc families functions in order to allocate memory:

• my_malloc
• my_free
• my_calloc
• my_realloc

Description

How did we solve it? See:

Design doc

Installation

In your project directory:

1. git clone https://git.us.qwasar.io/my_malloc_168649_if1t4-/my_malloc.git

2. cd my_malloc && make test run_tests to confirm all tests are passing

3. cd .. && touch main.c and add the following:

   #include "./my_malloc/inc/main.h" and `make`:
   
   int main() {
       void* ptr = my_malloc(100);
       printf("ptr: %p\n", ptr);
   
       return 0;
   }

4. touch Makefile and add the following then make:

   CC = gcc
   CFLAGS = -Wall -Wextra -Werror -fsanitize=address -g3 -I./my_malloc/include -I./include
   LDFLAGS := -L./my_malloc/build/lib -lmymalloc
   SRCDIR = ./my_malloc/src
   BUILDDIR = ./my_malloc/build
   LIBDIR = $(BUILDDIR)/lib
   LIBRARY = $(LIBDIR)/libmymalloc.a
   
   # Collect all source files recursively from my_malloc/src
   SOURCES := $(shell find $(SRCDIR) -name '*.c')
   OBJECTS := $(patsubst $(SRCDIR)/%.c, $(BUILDDIR)/src/%.o, $(SOURCES))
   
   # Ensure build directories exist
   $(shell mkdir -p $(LIBDIR))
   $(shell mkdir -p $(BUILDDIR)/src)
   
   all: $(LIBRARY) my_project
   
   $(LIBRARY): $(OBJECTS)
     $(AR) rcs $@ $^
   
   $(BUILDDIR)/src/%.o: $(SRCDIR)/%.c
     @mkdir -p $(dir $@)
     $(CC) $(CFLAGS) -c -o $@ $<
   
   my_project: $(BUILDDIR)/main.o $(LIBRARY)
     $(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
   
   $(BUILDDIR)/main.o: main.c
     @mkdir -p $(dir $@)
     $(CC) $(CFLAGS) -c -o $@ $<
   
   clean:
     rm -rf $(BUILDDIR)
   
   .PHONY: all clean

Usage

run ./my_project to test malloc functions directly in your main

The Core Team

Rebecca Whipple Silverstein and Mathius Johnson

Made at Qwasar SV -- Software Engineering School <img alt='Qwasar SV -- Software Engineering School's Logo' src='https://storage.googleapis.com/qwasar-public/qwasar-logo_50x50.png' width='20px' />