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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@1028 626c5289-ae23-0410-ae9c-e8d60b6d4f22
This commit is contained in:
Dave Beazley
parent
6c052b692b
commit
a41924d0ea
7 changed files with 339 additions and 67 deletions
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@ -1,36 +1,179 @@
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# -----------------------------------------------------------------------------
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# Wad port-mortem debugger
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# WAD Post-mortem debugger
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#
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# This program can be used to walk up and down the call stack of a mixed
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# Python-C program. The following commands are supported:
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#
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# w - A stack traceback
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# u - Go up the call stack
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# d - Go down the call stack
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# e - Edit a file
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# c - Clear the debugger.
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#
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# David Beazley
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# Copyright (C) 2001
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# University of Chicago
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# All Rights Reserved
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# -----------------------------------------------------------------------------
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import sys
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import os
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import traceback
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import types
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import linecache
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_last_exc = None
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print "**************************************************"
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print "* WAD Post-Mortem Debugger *"
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print "**************************************************"
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# Save a local copy of the last exception and value objects from sys
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_last_type = sys.last_type
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_last_value = sys.last_value
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_last_traceback = sys.last_traceback
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_last_level = 0
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frame = None
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print "WAD port-mortem"
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_cstack = None # Stack of C-only code
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_pystack = None # Stack of Python only code
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_combined_stack = None # Combined C-python stack
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_allmode = 0 # Show entire C stack
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# Generalized object for holding stack frames
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class wad_frame:
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def __init__(self,frame, n = 0):
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if isinstance(frame,types.TupleType):
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# A Python traceback object
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self.file = frame[0]
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self.line = frame[1]
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self.name = frame[2]
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self.argstr = frame[3]
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self.frameno = n
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# Make the debugging string
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self.debugstr = "#%-3d [ Python ] in %s in %s, line %d" % (self.frameno, self.argstr, self.file, self.line)
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# Try to get source data
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self.source = "%s, Line %d\n\n" % (self.file, self.line)
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for i in range(self.line-2,self.line+3):
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l = linecache.getline(self.file,i)
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if not l: l = '\n'
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if (i == self.line):
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self.source += " => "
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else:
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self.source += " "
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self.source += l
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elif hasattr(frame,"__WAD__"):
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# A WAD traceback object
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self.file = frame.__FILE__
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self.line = frame.__LINE__
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self.name = frame.__NAME__
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self.debugstr = frame.__WHERE__
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self.source = frame.__SOURCE__
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def __str__(self):
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return self.debugstr.strip()
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def output(self):
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print self
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if self.source:
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print "\n%s" % (self.source,)
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def wad_build_info():
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global _last_type,_last_value, _last_traceback, _cstack, _combined_stack,_pystack
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_last_type = None
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_last_value = None
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_last_traceback = None
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_cstack = None
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_combined_stack = []
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# Check to see if any exception is defined
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if not sys.last_type:
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print "No exception has occurred."
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return
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# Save a copy of previous exception
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_last_type = sys.last_type
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_last_value = sys.last_value
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_last_traceback = sys.last_traceback
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_last_level = 0
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start_frame = 0
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# Test to see what kind of object it is
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if issubclass(_last_type,StandardError):
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# Python exception
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print "Python exception"
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elif hasattr(_last_value[0],"__WAD__"):
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# A wad exception frame object
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w = sys.last_value[0]
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i = 0
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_cstack = []
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while not w[i].__LAST__:
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start_frame += 1
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wf = wad_frame(w[i])
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_cstack.append(wf)
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i = i + 1
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# wf = wad_frame(w[i])
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# _cstack.append(wf)
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# start_frame += 1
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# Build the rest of the c stack
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_combined_stack = _cstack[:]
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while i < len(w):
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wf = wad_frame(w[i])
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_cstack.append(wf)
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i = i + 1
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else:
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print "Unknown error"
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# Build the Python call stack
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_pystack = []
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t = sys.last_traceback
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tp = None
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while hasattr(t,"tb_frame"):
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tp = t
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t = t.tb_next
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fr = traceback.extract_stack(tp.tb_frame)
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for i in range(len(fr),0,-1):
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f = wad_frame(fr[i-1], start_frame)
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start_frame += 1
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_pystack.append(f)
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_combined_stack.extend(_pystack)
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wad_build_info()
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class where_impl:
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def __init__(self):
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self.all = 0;
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self.cstack = 0
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def __repr__(self):
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global _last_exc, _last_level, frame
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if sys.last_value:
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if not _last_exc:
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_last_exc = sys.last_value[0]
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_last_level = 0
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global _combined_stack, _cstack, _last_level
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if (self.cstack):
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stack = _cstack
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else:
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stack = _combined_stack
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else:
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raise RuntimeError,"No pending error."
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if (self.all):
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print repr(_last_exc)
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else:
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print str(_last_exc)
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frame = _last_exc
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if not stack:
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print "No current exception."
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return ""
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last_source = None
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for i in range(len(stack),0,-1):
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f = stack[i-1]
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print f
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if (f.source):
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last_source = f.source
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_last_level = i-1
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if last_source: print "\n%s" % last_source
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return ""
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def __getattr__(self,name):
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try:
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@ -39,10 +182,14 @@ class where_impl:
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raise AttributeError
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def __getitem__(self,n):
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global frame, _last_level
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frame = _last_exc[n]
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global _last_level, _cstack, _combined_stack
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if (self.cstack):
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stack = _cstack
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else:
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stack = _combined_stack
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_last_level = n
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return frame
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stack[_last_level].output()
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return None
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def __len__(self):
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return len(frame)
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@ -53,12 +200,16 @@ w = where
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class up_impl:
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def __repr__(self):
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global _last_exc, _last_level, frame
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if not _last_exc:
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global _last_level, _combined_stack, _cstack
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if where.cstack:
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stack = _cstack
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else:
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stack = _combined_stack
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if not stack:
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return ""
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_last_level += 1
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print repr(_last_exc[_last_level])
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frame = _last_exc[_last_level]
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stack[_last_level].output()
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return ""
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up = up_impl()
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@ -66,12 +217,16 @@ u = up
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class down_impl:
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def __repr__(self):
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global _last_exc, _last_level, frame
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if not _last_exc:
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global _last_level, _combined_stack, _cstack
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if where.cstack:
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stack = _cstack
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else:
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stack = _combined_stack
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if not stack:
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return ""
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_last_level -= 1
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print repr(_last_exc[_last_level])
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frame = _last_exc[_last_level]
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stack[_last_level].output()
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return ""
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down = down_impl()
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@ -86,3 +241,26 @@ class clear_impl:
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clear = clear_impl()
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c = clear
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class edit_impl:
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def __repr__(self):
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global _last_level, _combined_stack, _cstack
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if where.cstack:
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stack = _cstack
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else:
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stack = _combined_stack
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if not stack:
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return ""
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f = stack[_last_level]
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e = os.getenv("EDITOR","emacs")
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if f.file:
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os.system("%s +%d %s" % (e,f.line,f.file))
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return ""
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edit = edit_impl()
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e = edit
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repr(w)
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