add debugging script i used

it is a watermark script that uses mspdebug to autostep through a program.
i reimplemented it directly into mspdebug on http://github.com/poelzi/mspdebug but maybe it gets usefull one day.
it is on both implementations extremly slow :-)

tools/step_crash_detector.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+
+"""
+This script runs the chronos firmware through the debugger msp430-debugger
+step by step until the firmware jumps until a watermark (means it restarted)
+.
+It then stops so you see the traceback of PC addresses
+"""
+
+WATERMARK = 0x800a
+outbuffer = []
+
+import subprocess
+import os, re, sys
+
+pop = subprocess.Popen(["mspdebug","rf2500"], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
+pop.stdin.write("sym import build/eZChronos.dbg.elf\n")
+
+INPUT_LINE = re.compile(r'''\(mspdebug\) .*''')
+PC_MATCH = re.compile(r'''PC: ([0-9a-fA-F]+)''')
+
+started = False
+
+def loop_until():
+    global started
+    i = 0
+    while True:
+        buf = pop.stdout.readline()
+        #sys.stdout.write(buf)
+        outbuffer.append(buf)
+        search = PC_MATCH.search(buf)
+        if search:
+            pos = int(search.group(1), 16)
+            if pos >= WATERMARK and not started:
+                started = True
+                print " ####################################### STARTED #################################"
+            if pos < WATERMARK and started:
+                print " ############################### UNDER WATERMARK DETECTED ########################"
+                # print outbuffer
+                for line in outbuffer:
+                    sys.stdout.write(line)
+                return
+            print search.group(0)
+            if i == 10:
+                # trunkate outbuffer to 10000 lines
+                del outbuffer[:len(outbuffer)-10000]
+
+        if INPUT_LINE.match(buf):
+            pop.stdin.write("step\n")
+            #sys.stdout.write("step\n")
+        i = i+1%5000
+
+
+try:
+    while True:
+        loop_until()
+        ignore = False
+        while True:
+            buf = pop.stdout.readline()
+            sys.stdout.write(buf)
+            if INPUT_LINE.match(buf):
+                #if ignore:
+                #    ignore = False
+                #else:
+                    command = raw_input(">>> ")
+                    if command == "restart":
+                        started = False
+                        pop.stdin.write("step\n")
+                        sys.stdout.write("step\n")
+                        break
+                    if command == "continue":
+                        pop.stdin.write("step\n")
+                        sys.stdout.write("step\n")
+                        break
+                    elif command == "exit":
+                        raise KeyboardInterrupt
+                    else:
+                        pop.stdin.write("%s\n" %command)
+                        ignore = True
+        
+    #pop.stdin.write("step\n")
+except KeyboardInterrupt:
+    print "kill %s" %pop.pid
+    pop.terminate()