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+:\d+$")
  99                 rxcond = re.compile("^\s+stop only if")
 100
 101                 bpnts = []
 102
 103                 try:
 104                         i = 1
 105
 106                         #Parse the resulting lines
 107                         while i<len(bplines):
 108
 109                                 line = bplines[i]
 110                                 while not rxbp.search(line):
 111                                         i += 1
 112                                         line = bplines[i]
 113
 114                                 #Get number of breakpoint
 115                                 no = string.split(line)[0]
 116
 117                                 #This line does not contain the file!
 118                                 #Check for next line...
 119                                 while not rxpos.search(line):
 120                                         i += 1
 121                                         line = bplines[i]
 122
 123                                 pos = string.split(line)[-1]
 124                                 [file,lineno] = string.split(pos,":")
 125                                 cond = None
 126
 127                                 #Look for conditions
 128                                 if i+1<len(bplines) and rxcond.search(bplines[i+1]):
 129                                         i +=1
 130                                         line = bplines[i]
 131                                         cond = string.join(string.split(line," if ")[1:], " if ")
 132                                         cond = cond.strip()
 133
 134                                 bpnts += [[no, file, lineno, cond]]
 135                                 i += 1
 136
 137                 except IndexError:
 138                         pass
 139
 140                 return bpnts
 141
 142
 143
 144         def getExpression(self, expr):
 145                 answer = self.__getAnswerFromCmd("print " + expr + "\n")
 146                 answer = answer[-1]
 147
 148                 if len(string.split(answer, "=")) == 1:
 149                         return answer.strip()
 150
 151                 split = string.split(answer, "=")
 152                 return string.join(split[1:], "=").strip()
 153
 154
 155         def listCodeSnippet(self):
 156                 return self.__getAnswerFromCmd("list\n")
 157
 158         def getBacktrace(self):
 159
 160                 stack = []
 161                 answ = self.__getAnswerFromCmd("bt\n")
 162
 163                 rxstartfull = re.compile("^\#\d+\s+0x[0-9a-f]+\s+in\s+\S+\s+\(")
 164                 rxstartshort = re.compile("^\#\d+\s+\S+\s+\(")
 165                 rxpos = re.compile("at \S+:\d+$")
 166
 167                 try:
 168
 169                         i=0
 170                         while i<len(answ):
 171                                 line = answ[i]
 172
 173                                 while not rxstartfull.search(line) and not rxstartshort.search(line):
 174                                         print "Warning: '", line, "' does not match bt entry."
 175                                         i+=1
 176                                         line = answ[i]
 177
 178                                 parts = line.split()
 179
 180                                 if rxstartfull.search(line):
 181                                         func = parts[3]
 182                                         addr = parts[1]
 183                                 else:
 184                                         func = parts[1]
 185                                         addr = None
 186
 187
 188                                 #Search for file position
 189                                 while not rxpos.search(line):
 190                                         i+=1
 191                                         line = answ[i]
 192
 193                                 parts = line.split()
 194                                 pos = parts[-1]
 195                                 [file,lineno] = pos.split(":")
 196
 197                                 stack += [[addr,func,file,lineno]]
 198
 199                                 i+=1
 200
 201                 except IndexError:
 202                         pass
 203
 204                 return stack
 205
 206         def waitForPrompt(self, his):
 207                 rx = "^\(gdb\)"
 208                 return self.waitForRx(rx,his)
 209
 210         def __getAnswerFromCmd(self, cmd):
 211                 starthis = self.getHistoryLen()
 212                 self.feed_child(cmd)
 213                 endhis, response = self.waitForPrompt(starthis)
 214
 215                 return self.history[starthis:endhis]
 216
 217
 218         def testForActivity(self, his):
 219                 """Test whether debugger got active again"""
 220
 221                 line = self.history[his]
 222
 223                 if string.find(line, "\x1a\x1a") == 0:
 224                         tuples = string.split(line[2:], ":")
 225                         tuples[1] = int(tuples[1])
 226                         return "break", [tuples[0], int(tuples[1])]
 227
 228                 if string.find(line, "Program exited") == 0:
 229                         code = string.split(line)[-1]
 230
 231                         codeno = 0
 232
 233                         #Parse the octal number
 234                         if code[0] == "O":
 235                                 code = code[1:-1]
 236                                 for c in code:
 237                                         codeno = codeno*8 + int(c)
 238
 239                         return "exited", codeno
 240
 241                 return None
 242
 243
 244         def testForInactivity(self, his):
 245                 """Test whether debugger got inactive"""
 246                 line = self.history[his]
 247
 248                 if string.find(line, "Starting program:") == 0:
 249                         prog = string.join( string.split(line)[1:])
 250                         return "started", prog
 251
 252                 if string.find(line, "Continuing.") == 0:
 253                         return "continued", None
 254
 255                 if string.find(line, "\x1a\x1a") == 0:
 256                         rxcont = re.compile("^\(gdb\)\s+(cont|step|next|stepi|nexti|advance)")
 257
 258                         if rxcont.search(self.history[his-1]):
 259                                 return "stepped", None
 260                         if rxcont.search(self.history[his-2]):
 261                                 return "stepped", None
 262
 263                 return None
 264
 265
 266
 267
 268
 269
 270
 271
 272 if __name__ == "__main__":
 273
 274
 275         dbgterm = GdbTerminal(string.join(sys.argv[1:]))
 276         dbgwnd = DbgTerminal.DbgWindow(dbgterm)
 277
 278         gtk.main()
 279
 280
 281
 282