Add saving process state from ptrace and add script to automate it

README.md

@@ -1,13 +1,16 @@
 # Checkpointing
+## Requirements
+This system was tested on linux with kernel version >= 6.11.5. 
 
 ## Setup
 
 in `/get-tasks`:
 
 ```
 make
-make install
+make install 
 ```
+(use `make reinstall` to reinstall the kernel extension)
 
 in `/app`:
 
@@ -21,8 +24,13 @@ in `/`:
 gcc hello-world.c -O3 -no-pie -fno-pic -static
 ```
 
-## Run
+Anywhere:
+```
+echo 0 | sudo tee /proc/sys/kernel/randomize_va_space # disables ASLR
+```
 
+## Run
+### GDP & kernel extension
 in `/`:
 
 ```
@@ -40,3 +48,9 @@ sudo ./target/debug/app read <PID>
 sudo ./target/debug/app dump <PID> hello.proc
 sudo ./target/debug/app restore hello.proc
 ```
+
+### ptrace only
+in `/app`
+```
+sudo ./run.sh
+```

app/run.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+SESSION_NAME="runner"
+
+# Setup tmux session
+tmux new-session -d -s $SESSION_NAME
+tmux split-window -h -t $SESSION_NAME
+
+# Starts a.out in the second pane and retrieves the pid of the process
+tmux send-keys -t $SESSION_NAME:0.1 "cd .." C-m
+tmux send-keys -t $SESSION_NAME:0.1 "./a.out & echo \$! > /tmp/a_out_pid" C-m
+sleep 2
+
+A_OUT_PID=$(cat /tmp/a_out_pid)
+rm -f /tmp/a_out_pid
+
+echo "PID of a.out: $A_OUT_PID"
+
+# starts the restore process using the pid found
+tmux send-keys -t $SESSION_NAME:0.0  "./target/debug/app ptrace-restore $A_OUT_PID hello.proc" C-m
+
+# Attach to tmux and setup kill-session on exit
+tmux set-option -t $SESSION_NAME destroy-unattached off
+tmux set-option -t $SESSION_NAME remain-on-exit off
+tmux set-hook -t $SESSION_NAME pane-exited "kill-session"
+
+tmux attach-session -t $SESSION_NAME