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#! /usr/bin/python2.7 # objgraph # # Read "nm -o" input (on IRIX: "nm -Bo") of a set of libraries or modules # and print various interesting listings, such as: # # - which names are used but not defined in the set (and used where), # - which names are defined in the set (and where), # - which modules use which other modules, # - which modules are used by which other modules. # # Usage: objgraph [-cdu] [file] ... # -c: print callers per objectfile # -d: print callees per objectfile # -u: print usage of undefined symbols # If none of -cdu is specified, all are assumed. # Use "nm -o" to generate the input (on IRIX: "nm -Bo"), # e.g.: nm -o /lib/libc.a | objgraph import sys import os import getopt import re # Types of symbols. # definitions = 'TRGDSBAEC' externals = 'UV' ignore = 'Nntrgdsbavuc' # Regular expression to parse "nm -o" output. # matcher = re.compile('(.*):\t?........ (.) (.*)$') # Store "item" in "dict" under "key". # The dictionary maps keys to lists of items. # If there is no list for the key yet, it is created. # def store(dict, key, item): if dict.has_key(key): dict[key].append(item) else: dict[key] = [item] # Return a flattened version of a list of strings: the concatenation # of its elements with intervening spaces. # def flat(list): s = '' for item in list: s = s + ' ' + item return s[1:] # Global variables mapping defined/undefined names to files and back. # file2undef = {} def2file = {} file2def = {} undef2file = {} # Read one input file and merge the data into the tables. # Argument is an open file. # def readinput(fp): while 1: s = fp.readline() if not s: break # If you get any output from this line, # it is probably caused by an unexpected input line: if matcher.search(s) < 0: s; continue # Shouldn't happen (ra, rb), (r1a, r1b), (r2a, r2b), (r3a, r3b) = matcher.regs[:4] fn, name, type = s[r1a:r1b], s[r3a:r3b], s[r2a:r2b] if type in definitions: store(def2file, name, fn) store(file2def, fn, name) elif type in externals: store(file2undef, fn, name) store(undef2file, name, fn) elif not type in ignore: print fn + ':' + name + ': unknown type ' + type # Print all names that were undefined in some module and where they are # defined. # def printcallee(): flist = file2undef.keys() flist.sort() for filename in flist: print filename + ':' elist = file2undef[filename] elist.sort() for ext in elist: if len(ext) >= 8: tabs = '\t' else: tabs = '\t\t' if not def2file.has_key(ext): print '\t' + ext + tabs + ' *undefined' else: print '\t' + ext + tabs + flat(def2file[ext]) # Print for each module the names of the other modules that use it. # def printcaller(): files = file2def.keys() files.sort() for filename in files: callers = [] for label in file2def[filename]: if undef2file.has_key(label): callers = callers + undef2file[label] if callers: callers.sort() print filename + ':' lastfn = '' for fn in callers: if fn <> lastfn: print '\t' + fn lastfn = fn else: print filename + ': unused' # Print undefined names and where they are used. # def printundef(): undefs = {} for filename in file2undef.keys(): for ext in file2undef[filename]: if not def2file.has_key(ext): store(undefs, ext, filename) elist = undefs.keys() elist.sort() for ext in elist: print ext + ':' flist = undefs[ext] flist.sort() for filename in flist: print '\t' + filename # Print warning messages about names defined in more than one file. # def warndups(): savestdout = sys.stdout sys.stdout = sys.stderr names = def2file.keys() names.sort() for name in names: if len(def2file[name]) > 1: print 'warning:', name, 'multiply defined:', print flat(def2file[name]) sys.stdout = savestdout # Main program # def main(): try: optlist, args = getopt.getopt(sys.argv[1:], 'cdu') except getopt.error: sys.stdout = sys.stderr print 'Usage:', os.path.basename(sys.argv[0]), print '[-cdu] [file] ...' print '-c: print callers per objectfile' print '-d: print callees per objectfile' print '-u: print usage of undefined symbols' print 'If none of -cdu is specified, all are assumed.' print 'Use "nm -o" to generate the input (on IRIX: "nm -Bo"),' print 'e.g.: nm -o /lib/libc.a | objgraph' return 1 optu = optc = optd = 0 for opt, void in optlist: if opt == '-u': optu = 1 elif opt == '-c': optc = 1 elif opt == '-d': optd = 1 if optu == optc == optd == 0: optu = optc = optd = 1 if not args: args = ['-'] for filename in args: if filename == '-': readinput(sys.stdin) else: readinput(open(filename, 'r')) # warndups() # more = (optu + optc + optd > 1) if optd: if more: print '---------------All callees------------------' printcallee() if optu: if more: print '---------------Undefined callees------------' printundef() if optc: if more: print '---------------All Callers------------------' printcaller() return 0 # Call the main program. # Use its return value as exit status. # Catch interrupts to avoid stack trace. # if __name__ == '__main__': try: sys.exit(main()) except KeyboardInterrupt: sys.exit(1)
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