Added hw3 skeleton code

hw3/.gitignore

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+mm_test
+core

hw3/Makefile

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+#
+# WARNING
+#
+# You should NOT edit this file, to change compiler flags, defines, etc.
+# The hw3 autograder will replace this Makefile with a fresh copy.
+#
+SRCS=mm_alloc.c mm_test.c
+EXECUTABLES=mm_test
+
+CC=gcc
+CFLAGS=-g -Wall
+LDFLAGS=
+
+OBJS=$(SRCS:.c=.o)
+
+all: $(EXECUTABLES)
+
+$(EXECUTABLES): $(OBJS)
+	$(CC) $(CFLAGS) $(OBJS) $(LDFLAGS) -o $@
+
+.c.o:
+	$(CC) $(CFLAGS) -c $< -o $@
+
+clean:
+	rm -rf $(EXECUTABLES) $(OBJS)

hw3/mm_alloc.c

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+/*
+ * mm_alloc.c
+ *
+ * Stub implementations of the mm_* routines.
+ */
+
+#include "mm_alloc.h"
+#include <stdlib.h>
+
+void *mm_malloc(size_t size) {
+    /* YOUR CODE HERE */
+    return NULL;
+}
+
+void *mm_realloc(void *ptr, size_t size) {
+    /* YOUR CODE HERE */
+    return NULL;
+}
+
+void mm_free(void *ptr) {
+    /* YOUR CODE HERE */
+}

hw3/mm_alloc.h

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+/*
+ * mm_alloc.h
+ *
+ * Exports a clone of the interface documented in "man 3 malloc".
+ */
+
+#pragma once
+
+#include <stdlib.h>
+
+void *mm_malloc(size_t size);
+void *mm_realloc(void *ptr, size_t size);
+void mm_free(void *ptr);

hw3/mm_test.c

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+/**
+ * A simple test harness for memory alloction. You should augment this with your
+ * own tests.
+ */
+
+#include <stdio.h>
+#include "mm_alloc.h"
+
+int main(int argc, char **argv) {
+    int *data;
+    data = (int *) mm_malloc(4);
+    data[0] = 1;
+    mm_free(data);
+    printf("malloc() basic test passed!\n");
+    return 0;
+}