the-die · the-die · Sep 26, 2022 · Jan 8, 2023 · Feb 1, 2023
diff --git a/.gitignore b/.gitignore
@@ -15,3 +15,13 @@ mkfs
 kernel/kernel
 user/usys.S
 .gdbinit
+myapi.key
+*-handin.tar.gz
+xv6.out*
+.vagrant/
+submissions/
+ph
+barrier
+/lab-*.json
+.DS_Store
+.cache
diff --git a/Makefile b/Makefile
@@ -1,14 +1,16 @@
+
+# To compile and run with a lab solution, set the lab name in conf/lab.mk
+# (e.g., LAB=util).  Run make grade to test solution with the lab's
+# grade script (e.g., grade-lab-util).
+
+-include conf/lab.mk
+
 K=kernel
 U=user
 
 OBJS = \
   $K/entry.o \
-  $K/start.o \
-  $K/console.o \
-  $K/printf.o \
-  $K/uart.o \
   $K/kalloc.o \
-  $K/spinlock.o \
   $K/string.o \
   $K/main.o \
   $K/vm.o \
@@ -30,6 +32,34 @@ OBJS = \
   $K/plic.o \
   $K/virtio_disk.o
 
+OBJS_KCSAN = \
+  $K/start.o \
+  $K/console.o \
+  $K/printf.o \
+  $K/uart.o \
+  $K/spinlock.o
+
+ifdef KCSAN
+OBJS_KCSAN += \
+	$K/kcsan.o
+endif
+
+ifeq ($(LAB),$(filter $(LAB), lock))
+OBJS += \
+	$K/stats.o\
+	$K/sprintf.o
+endif
+
+
+ifeq ($(LAB),net)
+OBJS += \
+	$K/e1000.o \
+	$K/net.o \
+	$K/sysnet.o \
+	$K/pci.o
+endif
+
+
 # riscv64-unknown-elf- or riscv64-linux-gnu-
 # perhaps in /opt/riscv/bin
 #TOOLPREFIX = 
@@ -57,12 +87,28 @@ OBJCOPY = $(TOOLPREFIX)objcopy
 OBJDUMP = $(TOOLPREFIX)objdump
 
 CFLAGS = -Wall -Werror -O -fno-omit-frame-pointer -ggdb -gdwarf-2
+
+ifdef LAB
+LABUPPER = $(shell echo $(LAB) | tr a-z A-Z)
+XCFLAGS += -DSOL_$(LABUPPER) -DLAB_$(LABUPPER)
+endif
+
+CFLAGS += $(XCFLAGS)
 CFLAGS += -MD
 CFLAGS += -mcmodel=medany
 CFLAGS += -ffreestanding -fno-common -nostdlib -mno-relax
 CFLAGS += -I.
 CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
 
+ifeq ($(LAB),net)
+CFLAGS += -DNET_TESTS_PORT=$(SERVERPORT)
+endif
+
+ifdef KCSAN
+CFLAGS += -DKCSAN
+KCSANFLAG = -fsanitize=thread
+endif
+
 # Disable PIE when possible (for Ubuntu 16.10 toolchain)
 ifneq ($(shell $(CC) -dumpspecs 2>/dev/null | grep -e '[^f]no-pie'),)
 CFLAGS += -fno-pie -no-pie
@@ -73,11 +119,17 @@ endif
 
 LDFLAGS = -z max-page-size=4096
 
-$K/kernel: $(OBJS) $K/kernel.ld $U/initcode
-	$(LD) $(LDFLAGS) -T $K/kernel.ld -o $K/kernel $(OBJS) 
+$K/kernel: $(OBJS) $(OBJS_KCSAN) $K/kernel.ld $U/initcode
+	$(LD) $(LDFLAGS) -T $K/kernel.ld -o $K/kernel $(OBJS) $(OBJS_KCSAN)
 	$(OBJDUMP) -S $K/kernel > $K/kernel.asm
 	$(OBJDUMP) -t $K/kernel | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > $K/kernel.sym
 
+$(OBJS): EXTRAFLAG := $(KCSANFLAG)
+
+$K/%.o: $K/%.c
+	$(CC) $(CFLAGS) $(EXTRAFLAG) -c -o $@ $<
+
+
 $U/initcode: $U/initcode.S
 	$(CC) $(CFLAGS) -march=rv64g -nostdinc -I. -Ikernel -c $U/initcode.S -o $U/initcode.o
 	$(LD) $(LDFLAGS) -N -e start -Ttext 0 -o $U/initcode.out $U/initcode.o
@@ -89,6 +141,10 @@ tags: $(OBJS) _init
 
 ULIB = $U/ulib.o $U/usys.o $U/printf.o $U/umalloc.o
 
+ifeq ($(LAB),$(filter $(LAB), lock))
+ULIB += $U/statistics.o
+endif
+
 _%: %.o $(ULIB)
 	$(LD) $(LDFLAGS) -T $U/user.ld -o $@ $^
 	$(OBJDUMP) -S $@ > $*.asm
@@ -107,7 +163,7 @@ $U/_forktest: $U/forktest.o $(ULIB)
 	$(OBJDUMP) -S $U/_forktest > $U/forktest.asm
 
 mkfs/mkfs: mkfs/mkfs.c $K/fs.h $K/param.h
-	gcc -Werror -Wall -I. -o mkfs/mkfs mkfs/mkfs.c
+	gcc $(XCFLAGS) -Werror -Wall -I. -o mkfs/mkfs mkfs/mkfs.c
 
 # Prevent deletion of intermediate files, e.g. cat.o, after first build, so
 # that disk image changes after first build are persistent until clean.  More
@@ -132,9 +188,79 @@ UPROGS=\
 	$U/_grind\
 	$U/_wc\
 	$U/_zombie\
+	$U/_alarmtest\
+
+
+ifeq ($(LAB),$(filter $(LAB), lock))
+UPROGS += \
+	$U/_stats
+endif
+
+ifeq ($(LAB),traps)
+UPROGS += \
+	$U/_call\
+	$U/_bttest
+endif
+
+ifeq ($(LAB),lazy)
+UPROGS += \
+	$U/_lazytests
+endif
+
+ifeq ($(LAB),cow)
+UPROGS += \
+	$U/_cowtest
+endif
+
+ifeq ($(LAB),thread)
+UPROGS += \
+	$U/_uthread
 
-fs.img: mkfs/mkfs README $(UPROGS)
-	mkfs/mkfs fs.img README $(UPROGS)
+$U/uthread_switch.o : $U/uthread_switch.S
+	$(CC) $(CFLAGS) -c -o $U/uthread_switch.o $U/uthread_switch.S
+
+$U/_uthread: $U/uthread.o $U/uthread_switch.o $(ULIB)
+	$(LD) $(LDFLAGS) -N -e main -Ttext 0 -o $U/_uthread $U/uthread.o $U/uthread_switch.o $(ULIB)
+	$(OBJDUMP) -S $U/_uthread > $U/uthread.asm
+
+ph: notxv6/ph.c
+	gcc -o ph -g -O2 $(XCFLAGS) notxv6/ph.c -pthread
+
+barrier: notxv6/barrier.c
+	gcc -o barrier -g -O2 $(XCFLAGS) notxv6/barrier.c -pthread
+endif
+
+ifeq ($(LAB),pgtbl)
+UPROGS += \
+	$U/_pgtbltest
+endif
+
+ifeq ($(LAB),lock)
+UPROGS += \
+	$U/_kalloctest\
+	$U/_bcachetest
+endif
+
+ifeq ($(LAB),fs)
+UPROGS += \
+	$U/_bigfile
+endif
+
+
+
+ifeq ($(LAB),net)
+UPROGS += \
+	$U/_nettests
+endif
+
+UEXTRA=
+ifeq ($(LAB),util)
+	UEXTRA += user/xargstest.sh
+endif
+
+
+fs.img: mkfs/mkfs README $(UEXTRA) $(UPROGS)
+	mkfs/mkfs fs.img README $(UEXTRA) $(UPROGS)
 
 -include kernel/*.d user/*.d
 
@@ -144,7 +270,8 @@ clean:
 	$U/initcode $U/initcode.out $K/kernel fs.img \
 	mkfs/mkfs .gdbinit \
         $U/usys.S \
-	$(UPROGS)
+	$(UPROGS) \
+	ph barrier
 
 # try to generate a unique GDB port
 GDBPORT = $(shell expr `id -u` % 5000 + 25000)
@@ -155,12 +282,22 @@ QEMUGDB = $(shell if $(QEMU) -help | grep -q '^-gdb'; \
 ifndef CPUS
 CPUS := 3
 endif
+ifeq ($(LAB),fs)
+CPUS := 1
+endif
+
+FWDPORT = $(shell expr `id -u` % 5000 + 25999)
 
 QEMUOPTS = -machine virt -bios none -kernel $K/kernel -m 128M -smp $(CPUS) -nographic
 QEMUOPTS += -global virtio-mmio.force-legacy=false
 QEMUOPTS += -drive file=fs.img,if=none,format=raw,id=x0
 QEMUOPTS += -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0
 
+ifeq ($(LAB),net)
+QEMUOPTS += -netdev user,id=net0,hostfwd=udp::$(FWDPORT)-:2000 -object filter-dump,id=net0,netdev=net0,file=packets.pcap
+QEMUOPTS += -device e1000,netdev=net0,bus=pcie.0
+endif
+
 qemu: $K/kernel fs.img
 	$(QEMU) $(QEMUOPTS)
 
@@ -171,3 +308,102 @@ qemu-gdb: $K/kernel .gdbinit fs.img
 	@echo "*** Now run 'gdb' in another window." 1>&2
 	$(QEMU) $(QEMUOPTS) -S $(QEMUGDB)
 
+ifeq ($(LAB),net)
+# try to generate a unique port for the echo server
+SERVERPORT = $(shell expr `id -u` % 5000 + 25099)
+
+server:
+	python3 server.py $(SERVERPORT)
+
+ping:
+	python3 ping.py $(FWDPORT)
+endif
+
+##
+##  FOR testing lab grading script
+##
+
+ifneq ($(V),@)
+GRADEFLAGS += -v
+endif
+
+print-gdbport:
+	@echo $(GDBPORT)
+
+grade:
+	@echo $(MAKE) clean
+	@$(MAKE) clean || \
+          (echo "'make clean' failed.  HINT: Do you have another running instance of xv6?" && exit 1)
+	./grade-lab-$(LAB) $(GRADEFLAGS)
+
+##
+## FOR web handin
+##
+
+
+WEBSUB := https://6828.scripts.mit.edu/2022/handin.py
+
+handin: tarball-pref myapi.key
+	@SUF=$(LAB); \
+	curl -f -F file=@lab-$$SUF-handin.tar.gz -F key=\<myapi.key $(WEBSUB)/upload \
+	    > /dev/null || { \
+		echo ; \
+		echo Submit seems to have failed.; \
+		echo Please go to $(WEBSUB)/ and upload the tarball manually.; }
+
+handin-check:
+	@if ! test -d .git; then \
+		echo No .git directory, is this a git repository?; \
+		false; \
+	fi
+	@if test "$$(git symbolic-ref HEAD)" != refs/heads/$(LAB); then \
+		git branch; \
+		read -p "You are not on the $(LAB) branch.  Hand-in the current branch? [y/N] " r; \
+		test "$$r" = y; \
+	fi
+	@if ! git diff-files --quiet || ! git diff-index --quiet --cached HEAD; then \
+		git status -s; \
+		echo; \
+		echo "You have uncomitted changes.  Please commit or stash them."; \
+		false; \
+	fi
+	@if test -n "`git status -s`"; then \
+		git status -s; \
+		read -p "Untracked files will not be handed in.  Continue? [y/N] " r; \
+		test "$$r" = y; \
+	fi
+
+UPSTREAM := $(shell git remote -v | grep -m 1 "xv6-labs-2022" | awk '{split($$0,a," "); print a[1]}')
+
+tarball: handin-check
+	git archive --format=tar HEAD | gzip > lab-$(LAB)-handin.tar.gz
+
+tarball-pref: handin-check
+	@SUF=$(LAB); \
+	git archive --format=tar HEAD > lab-$$SUF-handin.tar; \
+	git diff $(UPSTREAM)/$(LAB) > /tmp/lab-$$SUF-diff.patch; \
+	tar -rf lab-$$SUF-handin.tar /tmp/lab-$$SUF-diff.patch; \
+	gzip -c lab-$$SUF-handin.tar > lab-$$SUF-handin.tar.gz; \
+	rm lab-$$SUF-handin.tar; \
+	rm /tmp/lab-$$SUF-diff.patch; \
+
+myapi.key:
+	@echo Get an API key for yourself by visiting $(WEBSUB)/
+	@read -p "Please enter your API key: " k; \
+	if test `echo "$$k" |tr -d '\n' |wc -c` = 32 ; then \
+		TF=`mktemp -t tmp.XXXXXX`; \
+		if test "x$$TF" != "x" ; then \
+			echo "$$k" |tr -d '\n' > $$TF; \
+			mv -f $$TF $@; \
+		else \
+			echo mktemp failed; \
+			false; \
+		fi; \
+	else \
+		echo Bad API key: $$k; \
+		echo An API key should be 32 characters long.; \
+		false; \
+	fi;
+
+
+.PHONY: handin tarball tarball-pref clean grade handin-check