GdbTerminal.py

   1 #!/usr/bin/python
   2 #shuber, 2008-06-04
   3
   4 __author__ = "shuber"
   5
   6
   7 import gtk
   8 import os
   9 import re
  10 import string
  11 import sys
  12 import time
  13
  14 import DbgTerminal
  15
  16
  17 class GdbTerminal (DbgTerminal.DbgTerminal):
  18
  19
  20         def __init__(self, clientCmd):
  21                 DbgTerminal.DbgTerminal.__init__(self, clientCmd)
  22
  23         def getArgv(self):
  24                 return ["gdb", "--fullname", string.split(self.clientCmd)[0]]
  25
  26         def setRun(self):
  27                 argv = string.join(string.split(self.clientCmd)[1:])
  28                 self.feed_child("run " + argv + "\n")
  29
  30         def setContinue(self):
  31                 self.feed_child("cont\n");
  32
  33         def setStepover(self):
  34                 self.feed_child("next\n");
  35
  36         def setStepin(self):
  37                 self.feed_child("step\n");
  38
  39         def setStepout(self):
  40                 bt = self.getBacktrace()
  41
  42                 if len(bt) < 2:
  43                         self.setContinue()
  44
  45                 else:
  46                         #Get the second line
  47                         sec = bt[1]
  48
  49                         #Check if it is a backtrace line
  50                         if re.compile("^#1\s+.*\s\S+:\d+$").search(sec):
  51                                 pos = string.split(sec)[-1]
  52                                 self.feed_child("advance %s\n" % pos)
  53
  54
  55         def setQuit(self):
  56                 self.feed_child("quit\n")
  57                 self.waitForNewline()
  58                 self.feed_child("y\n");
  59
  60         def setPty(self, pty):
  61                 ttyname = os.ttyname(pty)
  62                 self.__getAnswerFromCmd("set inferior-tty %s\n" % (ttyname,))
  63
  64         def setBreakpoint(self, file, lineno, condition=None):
  65                 his = self.getHistoryLen()
  66                 if condition==None:
  67                         self.feed_child("break %s:%s\n" % (file, str(lineno)))
  68                 else:
  69                         self.feed_child("break %s:%s if %s\n" % \
  70                                         (file, str(lineno), condition))
  71
  72                 rx = "^Breakpoint |^No |^\(gdb\) "
  73                 his, response = self.waitForRx(rx, his)
  74
  75                 answer = None
  76
  77                 if response[0:10] == "Breakpoint":
  78                         answer = string.split(response)[1].strip()
  79
  80                 #Wants an answer: "No"
  81                 if response[0:14] == "No source file":
  82                         self.feed_child("n\n");
  83
  84                 #Wait again for (gdb)...
  85                 self.waitForPrompt(his)
  86
  87                 return answer
  88
  89
  90         def delBreakpoint(self, breakpoint):
  91                 self.__getAnswerFromCmd("del breakpoint %s\n" % (breakpoint,))
  92
  93
  94         def getBreakpoints(self):
  95                 bplines = self.__getAnswerFromCmd("info breakpoints\n")
  96
  97                 rxbp = re.compile("^\d+\s+breakpoint")
  98                 rxpos = re.compile("^.*at\s+\S+:\d+$")
  99                 rxcond = re.compile("^\s+stop only if")
 100
 101                 bpnts = []
 102                 i = 1
 103
 104                 #Parse the resulting lines
 105                 while i<len(bplines):
 106                         line = bplines[i]
 107
 108                         if not rxbp.search(line):
 109                                 i += 1
 110                                 continue
 111
 112                         #Get number of breakpoint
 113                         no = string.split(line)[0]
 114
 115                         #This line does not contain the file!
 116                         #Check for next line...
 117                         if not rxpos.search(line):
 118                                 i += 1
 119                                 line = bplines[i]
 120                         if not rxpos.search(line):
 121                                 i += 1
 122                                 continue
 123
 124                         pos = string.split(line)[-1]
 125                         [file,lineno] = string.split(pos,":")
 126                         cond = None
 127
 128                         #Look for conditions
 129                         if i+1<len(bplines) and rxcond.search(bplines[i+1]):
 130                                 i +=1
 131                                 line = bplines[i]
 132                                 cond = string.join(string.split(line," if ")[1:], " if ")
 133                                 cond = cond.strip()
 134
 135                         bpnts += [[no, file, lineno, cond]]
 136                         i += 1
 137
 138                 return bpnts
 139
 140
 141
 142         def getExpression(self, expr):
 143                 answer = self.__getAnswerFromCmd("print " + expr + "\n")
 144                 answer = answer[-1]
 145
 146                 if len(string.split(answer, "=")) == 1:
 147                         return answer.strip()
 148
 149                 split = string.split(answer, "=")
 150                 return string.join(split[1:], "=").strip()
 151
 152
 153         def listCodeSnippet(self):
 154                 return self.__getAnswerFromCmd("list\n")
 155
 156         def getBacktrace(self):
 157                 return self.__getAnswerFromCmd("bt\n")
 158
 159         def waitForPrompt(self, his):
 160                 rx = "^\(gdb\)"
 161                 return self.waitForRx(rx,his)
 162
 163         def __getAnswerFromCmd(self, cmd):
 164                 starthis = self.getHistoryLen()
 165                 self.feed_child(cmd)
 166                 endhis, response = self.waitForPrompt(starthis)
 167
 168                 return self.history[starthis:endhis]
 169
 170
 171         def testForActivity(self, his):
 172                 """Test whether debugger got active again"""
 173
 174                 line = self.history[his]
 175
 176                 if string.find(line, "\x1a\x1a") == 0:
 177                         tuples = string.split(line[2:], ":")
 178                         tuples[1] = int(tuples[1])
 179                         return "break", [tuples[0], int(tuples[1])]
 180
 181                 if string.find(line, "Program exited") == 0:
 182                         code = string.split(line)[-1]
 183
 184                         codeno = 0
 185
 186                         #Parse the octal number
 187                         if code[0] == "O":
 188                                 code = code[1:-1]
 189                                 for c in code:
 190                                         codeno = codeno*8 + int(c)
 191
 192                         return "exited", codeno
 193
 194                 return None
 195
 196
 197         def testForInactivity(self, his):
 198                 """Test whether debugger got inactive"""
 199                 line = self.history[his]
 200
 201                 if string.find(line, "Starting program:") == 0:
 202                         prog = string.join( string.split(line)[1:])
 203                         return "started", prog
 204
 205                 if string.find(line, "Continuing.") == 0:
 206                         return "continued", None
 207
 208                 if string.find(line, "\x1a\x1a") == 0:
 209                         rxcont = re.compile("^\(gdb\)\s+(cont|step|next|stepi|nexti|advance)")
 210
 211                         if rxcont.search(self.history[his-1]):
 212                                 return "stepped", None
 213                         if rxcont.search(self.history[his-2]):
 214                                 return "stepped", None
 215
 216                 return None
 217
 218
 219
 220
 221
 222
 223
 224
 225 if __name__ == "__main__":
 226
 227
 228         dbgterm = GdbTerminal(string.join(sys.argv[1:]))
 229         dbgwnd = DbgTerminal.DbgWindow(dbgterm)
 230
 231         gtk.main()
 232
 233
 234
 235