Add frame pointer markup to grokdump.

tools/grokdump.py

 #!/usr/bin/env python
 #
 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 742 matching lines @@
       return self.exception_context.eip
 
   def ExceptionSP(self):
     if self.arch == MD_CPU_ARCHITECTURE_AMD64:
       return self.exception_context.rsp
     elif self.arch == MD_CPU_ARCHITECTURE_ARM:
       return self.exception_context.sp
     elif self.arch == MD_CPU_ARCHITECTURE_X86:
       return self.exception_context.esp
 
+  def ExceptionFP(self):
+    if self.arch == MD_CPU_ARCHITECTURE_AMD64:
+      return self.exception_context.rbp
+    elif self.arch == MD_CPU_ARCHITECTURE_ARM:
+      return None
+    elif self.arch == MD_CPU_ARCHITECTURE_X86:
+      return self.exception_context.ebp
+
   def FormatIntPtr(self, value):
     if self.arch == MD_CPU_ARCHITECTURE_AMD64:
       return "%016x" % value
     elif self.arch == MD_CPU_ARCHITECTURE_ARM:
       return "%08x" % value
     elif self.arch == MD_CPU_ARCHITECTURE_X86:
       return "%08x" % value
 
   def PointerSize(self):
     if self.arch == MD_CPU_ARCHITECTURE_AMD64:
@@ skipping 1171 matching lines @@
   if options.command:
     InspectionShell(reader, heap).onecmd(options.command)
 
   if options.shell:
     try:
       InspectionShell(reader, heap).cmdloop("type help to get help")
     except KeyboardInterrupt:
       print "Kthxbye."
   elif not options.command:
     if reader.exception is not None:
+      frame_pointer = reader.ExceptionFP()
       print "Annotated stack (from exception.esp to bottom):"
       for slot in xrange(stack_top, stack_bottom, reader.PointerSize()):
         maybe_address = reader.ReadUIntPtr(slot)
         heap_object = heap.FindObject(maybe_address)
         maybe_symbol = reader.FindSymbol(maybe_address)
+        if slot == frame_pointer:
+          maybe_symbol = "<---- frame pointer"
+          frame_pointer = maybe_address
         print "%s: %s %s" % (reader.FormatIntPtr(slot),
                              reader.FormatIntPtr(maybe_address),
                              maybe_symbol or "")
         if heap_object:
           heap_object.Print(Printer())
           print
 
   reader.Dispose()
 
 
@@ skipping 13 matching lines @@
   options, args = parser.parse_args()
   if os.path.exists(options.objdump):
     disasm.OBJDUMP_BIN = options.objdump
     OBJDUMP_BIN = options.objdump
   else:
     print "Cannot find %s, falling back to default objdump" % options.objdump
   if len(args) != 1:
     parser.print_help()
     sys.exit(1)
   AnalyzeMinidump(options, args[0])