![Jeff Morriss](/assets/img/avatar_default.png)
There are a few things in here which could still use attention. Don't regenerate anything now. Change-Id: I283c224d3523212144707fca3d6265916cb11792 Reviewed-on: https://code.wireshark.org/review/205 Reviewed-by: Jeff Morriss <jeff.morriss.ws@gmail.com>
336 lines
8.8 KiB
Python
Executable file
336 lines
8.8 KiB
Python
Executable file
#!/usr/bin/env python
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#
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# Looks for registration routines in the protocol dissectors,
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# and assembles C code to call all the routines.
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#
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# This is a Python version of the make-reg-dotc shell script.
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# Running the shell script on Win32 is very very slow because of
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# all the process-launching that goes on --- multiple greps and
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# seds for each input file. I wrote this python version so that
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# less processes would have to be started.
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import os
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import sys
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import re
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import pickle
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import hashlib
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from stat import *
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VERSION_KEY = '_VERSION'
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CUR_VERSION = '$Id$'
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#
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# The first argument is the directory in which the source files live.
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#
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srcdir = sys.argv[1]
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#
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# The second argument is either "plugin" or "dissectors"; if it's
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# "plugin", we build a plugin.c for a plugin, and if it's
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# "dissectors", we build a register.c for libwireshark.
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#
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registertype = sys.argv[2]
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if registertype in ("plugin", "plugin_wtap"):
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final_filename = "plugin.c"
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cache_filename = None
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preamble = """\
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/*
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* Do not modify this file. Changes will be overwritten.
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*
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* Generated automatically from %s.
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*/
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""" % (sys.argv[0])
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elif registertype in ("dissectors", "dissectorsinfile"):
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final_filename = "register.c"
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cache_filename = "register-cache.pkl"
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preamble = """\
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/*
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* Do not modify this file. Changes will be overwritten.
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*
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* Generated automatically by the "register.c" target in
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* epan/dissectors/Makefile or Makefile.nmake using
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* %s
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* and information in epan/dissectors/register-cache.pkl.
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*
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* You can force this file to be regenerated completely by deleting
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* it along with epan/dissectors/register-cache.pkl.
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*/
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""" % (sys.argv[0])
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else:
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print(("Unknown output type '%s'" % registertype))
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sys.exit(1)
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#
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# All subsequent arguments are the files to scan
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# or the name of a file containing the files to scan
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#
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if registertype == "dissectorsinfile":
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try:
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dissector_f = open(sys.argv[3])
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except IOError:
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print(("Unable to open input file '%s'" % sys.argv[3]))
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sys.exit(1)
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files = [line.rstrip() for line in dissector_f]
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else:
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files = sys.argv[3:]
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# Create the proper list of filenames
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filenames = []
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for file in files:
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if os.path.isfile(file):
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filenames.append(file)
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else:
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filenames.append(os.path.join(srcdir, file))
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if len(filenames) < 1:
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print("No files found")
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sys.exit(1)
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# Look through all files, applying the regex to each line.
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# If the pattern matches, save the "symbol" section to the
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# appropriate set.
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regs = {
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'proto_reg': set(),
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'handoff_reg': set(),
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'wtap_register': set(),
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}
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# For those that don't know Python, r"" indicates a raw string,
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# devoid of Python escapes.
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proto_regex = r"(?P<symbol>proto_register_[_A-Za-z0-9]+)\s*\(\s*void\s*\)[^;]*$"
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handoff_regex = r"(?P<symbol>proto_reg_handoff_[_A-Za-z0-9]+)\s*\(\s*void\s*\)[^;]*$"
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wtap_reg_regex = r"(?P<symbol>wtap_register_[_A-Za-z0-9]+)\s*\([^;]+$"
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# This table drives the pattern-matching and symbol-harvesting
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patterns = [
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( 'proto_reg', re.compile(proto_regex, re.MULTILINE) ),
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( 'handoff_reg', re.compile(handoff_regex, re.MULTILINE) ),
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( 'wtap_register', re.compile(wtap_reg_regex, re.MULTILINE) ),
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]
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# Open our registration symbol cache
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cache = None
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if cache_filename:
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try:
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cache_file = open(cache_filename, 'rb')
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cache = pickle.load(cache_file)
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cache_file.close()
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if VERSION_KEY not in cache or cache[VERSION_KEY] != CUR_VERSION:
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cache = {VERSION_KEY: CUR_VERSION}
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except:
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cache = {VERSION_KEY: CUR_VERSION}
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print(("Registering %d files, %d cached" % (len(filenames), len(list(cache.keys()))-1)))
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# Grep
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cache_hits = 0
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cache_misses = 0
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for filename in filenames:
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file = open(filename)
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cur_mtime = os.fstat(file.fileno())[ST_MTIME]
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if cache and filename in cache:
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cdict = cache[filename]
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if cur_mtime == cdict['mtime']:
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cache_hits += 1
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# print "Pulling %s from cache" % (filename)
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regs['proto_reg'] |= set(cdict['proto_reg'])
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regs['handoff_reg'] |= set(cdict['handoff_reg'])
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regs['wtap_register'] |= set(cdict['wtap_register'])
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file.close()
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continue
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# We don't have a cache entry
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if cache is not None:
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cache_misses += 1
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cache[filename] = {
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'mtime': cur_mtime,
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'proto_reg': [],
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'handoff_reg': [],
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'wtap_register': [],
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}
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# print "Searching %s" % (filename)
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# Read the whole file into memory
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contents = file.read()
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for action in patterns:
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regex = action[1]
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for match in regex.finditer(contents):
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symbol = match.group("symbol")
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sym_type = action[0]
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regs[sym_type].add(symbol)
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if cache is not None:
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# print "Caching %s for %s: %s" % (sym_type, filename, symbol)
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cache[filename][sym_type].append(symbol)
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# We're done with the file contents
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contets = ""
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file.close()
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if cache is not None and cache_filename is not None:
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cache_file = open(cache_filename, 'wb')
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pickle.dump(cache, cache_file)
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cache_file.close()
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print(("Cache hits: %d, misses: %d" % (cache_hits, cache_misses)))
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# Make sure we actually processed something
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if len(regs['proto_reg']) < 1:
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print("No protocol registrations found")
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sys.exit(1)
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# Convert the sets into sorted lists to make the output pretty
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regs['proto_reg'] = sorted(regs['proto_reg'])
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regs['handoff_reg'] = sorted(regs['handoff_reg'])
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regs['wtap_register'] = sorted(regs['wtap_register'])
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reg_code = ""
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reg_code += preamble
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# Make the routine to register all protocols
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if registertype == "plugin" or registertype == "plugin_wtap":
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reg_code += """
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#include "config.h"
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#include <gmodule.h>
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#include "moduleinfo.h"
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/* plugins are DLLs */
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#define WS_BUILD_DLL
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#include "ws_symbol_export.h"
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#ifndef ENABLE_STATIC
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WS_DLL_PUBLIC_DEF void plugin_register (void);
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WS_DLL_PUBLIC_DEF const gchar version[] = VERSION;
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/* Start the functions we need for the plugin stuff */
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WS_DLL_PUBLIC_DEF void
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plugin_register (void)
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{
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"""
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else:
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reg_code += """
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#include "register.h"
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void
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register_all_protocols(register_cb cb, gpointer client_data)
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{
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"""
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for symbol in regs['proto_reg']:
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if registertype == "plugin" or registertype == "plugin_wtap":
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reg_code += " {extern void %s (void); %s ();}\n" % (symbol, symbol)
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else:
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reg_code += " {extern void %s (void); if(cb) (*cb)(RA_REGISTER, \"%s\", client_data); %s ();}\n" % (symbol, symbol, symbol)
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reg_code += "}\n"
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# Make the routine to register all protocol handoffs
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if registertype == "plugin" or registertype == "plugin_wtap":
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reg_code += """
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WS_DLL_PUBLIC_DEF void plugin_reg_handoff(void);
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WS_DLL_PUBLIC_DEF void
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plugin_reg_handoff(void)
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{
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"""
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else:
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reg_code += """
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void
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register_all_protocol_handoffs(register_cb cb, gpointer client_data)
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{
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"""
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for symbol in regs['handoff_reg']:
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if registertype == "plugin" or registertype == "plugin_wtap":
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reg_code += " {extern void %s (void); %s ();}\n" % (symbol, symbol)
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else:
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reg_code += " {extern void %s (void); if(cb) (*cb)(RA_HANDOFF, \"%s\", client_data); %s ();}\n" % (symbol, symbol, symbol)
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reg_code += "}\n"
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if registertype == "plugin":
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reg_code += "#endif\n"
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elif registertype == "plugin_wtap":
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reg_code += """
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WS_DLL_PUBLIC_DEF void
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register_wtap_module(void)
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{
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"""
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for symbol in regs['wtap_register']:
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line = " {extern void %s (void); %s ();}\n" % (symbol, symbol)
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reg_code += line
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reg_code += """
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}
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#endif
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"""
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else:
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reg_code += """
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static gulong proto_reg_count(void)
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{
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return %(proto_reg_len)d;
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}
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static gulong handoff_reg_count(void)
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{
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return %(handoff_reg_len)d;
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}
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gulong register_count(void)
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{
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return proto_reg_count() + handoff_reg_count();
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}
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""" % {
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'proto_reg_len': len(regs['proto_reg']),
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'handoff_reg_len': len(regs['handoff_reg'])
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}
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# Compare current and new content and update the file if anything has changed.
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try: # Python >= 2.6, >= 3.0
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reg_code_bytes = bytes(reg_code.encode('utf-8'))
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except:
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reg_code_bytes = reg_code
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new_hash = hashlib.sha1(reg_code_bytes).hexdigest()
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try:
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fh = open(final_filename, 'rb')
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cur_hash = hashlib.sha1(fh.read()).hexdigest()
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fh.close()
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except:
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cur_hash = ''
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try:
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if new_hash != cur_hash:
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print(('Updating ' + final_filename))
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fh = open(final_filename, 'w')
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fh.write(reg_code)
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fh.close()
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else:
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print((final_filename + ' unchanged.'))
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os.utime(final_filename, None)
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except OSError:
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sys.exit('Unable to write ' + final_filename + '.\n')
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#
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# Editor modelines - http://www.wireshark.org/tools/modelines.html
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#
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# Local variables:
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# c-basic-offset: 4
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# indent-tabs-mode: nil
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# End:
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#
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# vi: set shiftwidth=4 expandtab:
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# :indentSize=4:noTabs=true:
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#
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