Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 1 | #!/usr/bin/env python |
| 2 | |
| 3 | __doc__ = ''' |
| 4 | fsm-to-dot: convert FSM definitons to graph images |
| 5 | |
| 6 | Usage: |
| 7 | ./fsm-to-dot.py ~/openbsc/openbsc/src/libvlr/*.c |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 8 | for f in *.dot ; do dot -Tpng "$f" > "$f.png"; done |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 9 | # dot comes from 'apt-get install graphviz' |
| 10 | |
| 11 | Looks for osmo_fsm finite state machine definitions and madly parses .c files |
| 12 | to draw graphs of them. This uses wild regexes that rely on coding style etc.. |
| 13 | No proper C parsing is done here (pycparser sucked, unfortunately). |
| 14 | ''' |
| 15 | |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 16 | import sys, re, os |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 17 | |
| 18 | def err(msg): |
| 19 | sys.stderr.write(msg + '\n') |
| 20 | |
| 21 | class listdict(object): |
| 22 | def __getattr__(ld, name): |
| 23 | if name == 'add': |
| 24 | return ld.__getattribute__(name) |
| 25 | return ld.__dict__.__getattribute__(name) |
| 26 | |
| 27 | def _have(ld, name): |
| 28 | l = ld.__dict__.get(name) |
| 29 | if not l: |
| 30 | l = [] |
| 31 | ld.__dict__[name] = l |
| 32 | return l |
| 33 | |
| 34 | def add(ld, name, item): |
| 35 | l = ld._have(name) |
| 36 | l.append(item) |
| 37 | return ld |
| 38 | |
| 39 | def add_dict(ld, d): |
| 40 | for k,v in d.items(): |
| 41 | ld.add(k, v) |
| 42 | |
| 43 | def __setitem__(ld, name, val): |
| 44 | return ld.__dict__.__setitem__(name, val) |
| 45 | |
| 46 | def __getitem__(ld, name): |
| 47 | return ld.__dict__.__getitem__(name) |
| 48 | |
| 49 | def __str__(ld): |
| 50 | return ld.__dict__.__str__() |
| 51 | |
| 52 | def __repr__(ld): |
| 53 | return ld.__dict__.__repr__() |
| 54 | |
| 55 | def update(ld, other_ld): |
| 56 | for name, items in other_ld.items(): |
| 57 | ld.extend(name, items) |
| 58 | return ld |
| 59 | |
| 60 | def extend(ld, name, vals): |
| 61 | l = ld._have(name) |
| 62 | l.extend(vals) |
| 63 | return ld |
| 64 | |
| 65 | re_state_start = re.compile(r'\[([A-Z_][A-Z_0-9]*)\]') |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 66 | re_event_alternatives = [ |
| 67 | re.compile(r'\(1 *<< *([A-Z_][A-Z_0-9]*)\)'), |
| 68 | re.compile(r'S\(([A-Z_][A-Z_0-9]*)\)'), |
| 69 | ] |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 70 | re_action = re.compile(r'.action *= *([a-z_][a-z_0-9]*)') |
| 71 | |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 72 | re_insane_dot_name_chars = re.compile('[^a-zA-Z_]') |
| 73 | |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 74 | def state_starts(line): |
| 75 | m = re_state_start.search(line) |
| 76 | if m: |
| 77 | return m.group(1) |
| 78 | return None |
| 79 | |
| 80 | def in_event_starts(line): |
| 81 | return line.find('in_event_mask') >= 0 |
| 82 | |
| 83 | def out_state_starts(line): |
| 84 | return line.find('out_state_mask') >= 0 |
| 85 | |
| 86 | def states_or_events(line): |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 87 | results = [] |
| 88 | for one_re in re_event_alternatives: |
| 89 | results.extend(one_re.findall(line)) |
| 90 | return results |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 91 | |
| 92 | def parse_action(line): |
| 93 | a = re_action.findall(line) |
| 94 | if a: |
| 95 | return a[0] |
| 96 | return None |
| 97 | |
| 98 | def _common_prefix(a, b): |
| 99 | for l in reversed(range(1,len(a))): |
| 100 | aa = a[:l+1] |
| 101 | if b.startswith(aa): |
| 102 | return aa |
| 103 | return '' |
| 104 | |
| 105 | def common_prefix(strs): |
| 106 | if not strs: |
| 107 | return '' |
| 108 | p = None |
| 109 | for s in strs: |
| 110 | if p is None: |
| 111 | p = s |
| 112 | continue |
| 113 | p = _common_prefix(p, s) |
| 114 | if not p: |
| 115 | return '' |
| 116 | return p |
| 117 | |
| 118 | KIND_STATE = 'KIND_STATE' |
| 119 | KIND_FUNC = 'KIND_FUNC' |
| 120 | KIND_FSM = 'KIND_FSM' |
| 121 | BOX_SHAPES = { |
| 122 | KIND_STATE : None, |
| 123 | KIND_FUNC : 'box', |
| 124 | KIND_FSM : 'box3d', |
| 125 | } |
| 126 | |
| 127 | class Event: |
| 128 | def __init__(event, name): |
| 129 | event.name = name |
| 130 | event.short_name = name |
| 131 | |
| 132 | def __cmp__(event, other): |
| 133 | return cmp(event.name, other.name) |
| 134 | |
| 135 | class Edge: |
| 136 | def __init__(edge, to_state, event_name=None, style=None, action=None): |
| 137 | edge.to_state = to_state |
| 138 | edge.style = style |
| 139 | edge.events = [] |
| 140 | edge.actions = [] |
| 141 | edge.add_event_name(event_name) |
| 142 | edge.add_action(action) |
| 143 | |
| 144 | def add_event_name(edge, event_name): |
| 145 | if not event_name: |
| 146 | return |
| 147 | edge.add_event(Event(event_name)) |
| 148 | |
| 149 | def add_event(edge, event): |
| 150 | if not event: |
| 151 | return |
| 152 | if event in edge.events: |
| 153 | return |
| 154 | edge.events.append(event) |
| 155 | |
| 156 | def add_events(edge, events): |
| 157 | for event in events: |
| 158 | edge.add_event(event) |
| 159 | |
| 160 | def add_action(edge, action): |
| 161 | if not action or action in edge.actions: |
| 162 | return |
| 163 | edge.actions.append(action) |
| 164 | |
| 165 | def add_actions(edge, actions): |
| 166 | for action in actions: |
| 167 | edge.add_action(action) |
| 168 | |
| 169 | def event_names(edge): |
| 170 | return sorted([event.name for event in edge.events]) |
| 171 | |
| 172 | def event_labels(edge): |
| 173 | return sorted([event.short_name for event in edge.events]) |
| 174 | |
| 175 | def action_labels(edge): |
| 176 | return sorted([action + '()' for action in edge.actions]) |
| 177 | |
| 178 | def has_event_name(edge, event_name): |
| 179 | return event_name in edge.event_names() |
| 180 | |
| 181 | class State: |
| 182 | name = None |
| 183 | short_name = None |
| 184 | action = None |
| 185 | label = None |
| 186 | in_event_names = None |
| 187 | out_state_names = None |
| 188 | out_edges = None |
| 189 | kind = None |
| 190 | |
| 191 | def __init__(state): |
| 192 | state.in_event_names = [] |
| 193 | state.out_state_names = [] |
| 194 | state.out_edges = [] |
| 195 | state.kind = KIND_STATE |
| 196 | |
| 197 | def add_out_edge(state, edge): |
| 198 | for out_edge in state.out_edges: |
| 199 | if out_edge.to_state is edge.to_state: |
| 200 | if out_edge.style == edge.style: |
| 201 | out_edge.add_events(edge.events) |
| 202 | out_edge.add_actions(edge.actions) |
| 203 | return |
| 204 | # sanity |
| 205 | if out_edge.to_state.get_label() == edge.to_state.get_label(): |
| 206 | raise Exception('Two distinct states exist with identical labels.') |
| 207 | state.out_edges.append(edge) |
| 208 | |
| 209 | def get_label(state): |
| 210 | if state.label: |
| 211 | return state.label |
| 212 | l = [state.short_name] |
| 213 | if state.action: |
| 214 | if state.short_name == state.action: |
| 215 | l = [] |
| 216 | l.append(state.action + '()') |
| 217 | return r'\n'.join(l) |
| 218 | |
| 219 | def event_names(state): |
| 220 | event_names = [] |
| 221 | for out_edge in state.out_edges: |
| 222 | event_names.extend(out_edge.event_names()) |
| 223 | return event_names |
| 224 | |
| 225 | def shape_str(state): |
| 226 | shape = BOX_SHAPES.get(state.kind, None) |
| 227 | if not shape: |
| 228 | return '' |
| 229 | return ',shape=%s' % shape |
| 230 | |
| 231 | def __repr__(state): |
| 232 | return 'State(name=%r,short_name=%r,out=%d)' % (state.name, state.short_name, len(state.out_edges)) |
| 233 | |
| 234 | class Fsm: |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 235 | def __init__(fsm, struct_name, string_name, states_struct_name, from_file=None): |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 236 | fsm.states = [] |
| 237 | fsm.struct_name = struct_name |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 238 | fsm.string_name = string_name |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 239 | fsm.states_struct_name = states_struct_name |
| 240 | fsm.from_file = from_file |
| 241 | fsm.action_funcs = set() |
| 242 | fsm.event_names = set() |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 243 | fsm.dot_name = fsm.all_names_sanitized() |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 244 | |
| 245 | def parse_states(fsm, src): |
| 246 | state = None |
| 247 | started = None |
| 248 | |
| 249 | IN_EVENTS = 'events' |
| 250 | OUT_STATES = 'states' |
| 251 | |
| 252 | lines = src.splitlines() |
| 253 | |
| 254 | for line in lines: |
| 255 | state_name = state_starts(line) |
| 256 | if state_name: |
| 257 | state = State() |
| 258 | fsm.states.append(state) |
| 259 | started = None |
| 260 | state.name = state_name |
| 261 | |
| 262 | if in_event_starts(line): |
| 263 | started = IN_EVENTS |
| 264 | if out_state_starts(line): |
| 265 | started = OUT_STATES |
| 266 | |
| 267 | if not state or not started: |
| 268 | continue |
| 269 | |
| 270 | tokens = states_or_events(line) |
| 271 | if started == IN_EVENTS: |
| 272 | state.in_event_names.extend(tokens) |
| 273 | elif started == OUT_STATES: |
| 274 | state.out_state_names.extend(tokens) |
| 275 | else: |
| 276 | err('ignoring: %r' % tokens) |
| 277 | |
| 278 | a = parse_action(line) |
| 279 | if a: |
| 280 | state.action = a |
| 281 | |
| 282 | |
| 283 | for state in fsm.states: |
| 284 | if state.action: |
| 285 | fsm.action_funcs.add(state.action) |
| 286 | if state.in_event_names: |
| 287 | fsm.event_names.update(state.in_event_names) |
| 288 | |
| 289 | fsm.make_states_short_names() |
| 290 | fsm.ref_out_states() |
| 291 | |
| 292 | def make_states_short_names(fsm): |
| 293 | p = common_prefix([s.name for s in fsm.states]) |
| 294 | for s in fsm.states: |
| 295 | s.short_name = s.name[len(p):] |
| 296 | return p |
| 297 | |
| 298 | def make_events_short_names(fsm): |
| 299 | p = common_prefix(fsm.event_names) |
| 300 | for state in fsm.states: |
| 301 | for edge in state.out_edges: |
| 302 | for event in edge.events: |
| 303 | event.short_name = event.name[len(p):] |
| 304 | |
| 305 | def ref_out_states(fsm): |
| 306 | for state in fsm.states: |
| 307 | for e in [Edge(fsm.find_state_by_name(n, True)) for n in state.out_state_names]: |
| 308 | state.add_out_edge(e) |
| 309 | |
| 310 | def find_state_by_name(fsm, name, strict=False): |
| 311 | for state in fsm.states: |
| 312 | if state.name == name: |
| 313 | return state |
| 314 | if strict: |
| 315 | raise Exception("State not found: %r" % name); |
| 316 | return None |
| 317 | |
| 318 | def find_state_by_action(fsm, action): |
| 319 | for state in fsm.states: |
| 320 | if state.action == action: |
| 321 | return state |
| 322 | return None |
| 323 | |
| 324 | def add_special_state(fsm, additional_states, name, in_state=None, |
| 325 | out_state=None, event_name=None, kind=KIND_FUNC, |
| 326 | state_action=None, label=None, edge_action=None): |
| 327 | additional_state = None |
| 328 | for s in additional_states: |
| 329 | if s.short_name == name: |
| 330 | additional_state = s |
| 331 | break; |
| 332 | |
| 333 | if not additional_state: |
| 334 | for s in fsm.states: |
| 335 | if s.short_name == name: |
| 336 | additional_state = s |
| 337 | break; |
| 338 | |
| 339 | if kind == KIND_FUNC and not state_action: |
| 340 | state_action = name |
| 341 | |
| 342 | if not additional_state: |
| 343 | additional_state = State() |
| 344 | additional_state.short_name = name |
| 345 | additional_state.action = state_action |
| 346 | additional_state.kind = kind |
| 347 | additional_state.label = label |
| 348 | additional_states.append(additional_state) |
| 349 | |
| 350 | if out_state: |
| 351 | additional_state.out_state_names.append(out_state.name) |
| 352 | additional_state.add_out_edge(Edge(out_state, event_name, 'dotted', |
| 353 | action=edge_action)) |
| 354 | |
| 355 | if in_state: |
| 356 | in_state.out_state_names.append(additional_state.name) |
| 357 | in_state.add_out_edge(Edge(additional_state, event_name, 'dotted', |
| 358 | action=edge_action)) |
| 359 | |
| 360 | |
| 361 | def find_event_edges(fsm, c_files): |
| 362 | # enrich state transitions between the states with event labels |
| 363 | func_to_state_transitions = listdict() |
| 364 | for c_file in c_files: |
| 365 | func_to_state_transitions.update( c_file.find_state_transitions(fsm.event_names) ) |
| 366 | |
| 367 | # edges between explicit states |
| 368 | for state in fsm.states: |
| 369 | transitions = func_to_state_transitions.get(state.action) |
| 370 | if not transitions: |
| 371 | continue |
| 372 | |
| 373 | for to_state_name, event_name in transitions: |
| 374 | if not event_name: |
| 375 | continue |
| 376 | for out_edge in state.out_edges: |
| 377 | if out_edge.to_state.name == to_state_name: |
| 378 | out_edge.add_event_name(event_name) |
| 379 | |
| 380 | additional_states = [] |
| 381 | |
| 382 | |
| 383 | # functions that aren't state actions but still effect state transitions |
| 384 | for func_name, transitions in func_to_state_transitions.items(): |
| 385 | if func_name in fsm.action_funcs: |
| 386 | continue |
| 387 | for to_state_name, event_name in transitions: |
| 388 | to_state = fsm.find_state_by_name(to_state_name) |
| 389 | if not to_state: |
| 390 | continue |
| 391 | fsm.add_special_state(additional_states, func_name, None, to_state, event_name) |
| 392 | |
| 393 | |
| 394 | event_sources = c_files.find_event_sources(fsm.event_names) |
| 395 | |
| 396 | for state in fsm.states: |
| 397 | |
| 398 | for in_event_name in state.in_event_names: |
| 399 | funcs_for_in_event = event_sources.get(in_event_name) |
| 400 | if not funcs_for_in_event: |
| 401 | continue |
| 402 | |
| 403 | found = False |
| 404 | for out_edge in state.out_edges: |
| 405 | if out_edge.has_event_name(in_event_name): |
| 406 | out_edge.action = r'\n'.join([(f + '()') for f in funcs_for_in_event |
| 407 | if f != state.action]) |
| 408 | |
| 409 | # if any functions that don't belong to a state trigger events, add |
| 410 | # them to the graph as well |
| 411 | additional_funcs = [f for f in funcs_for_in_event if f not in fsm.action_funcs] |
| 412 | for af in additional_funcs: |
| 413 | fsm.add_special_state(additional_states, af, None, state, in_event_name) |
| 414 | |
| 415 | fsm.states.extend(additional_states) |
| 416 | |
| 417 | # do any existing action functions by chance call other action functions? |
| 418 | for state in fsm.states: |
| 419 | if not state.action: |
| 420 | continue |
| 421 | callers = c_files.find_callers(state.action) |
| 422 | if not callers: |
| 423 | continue |
| 424 | for other_state in fsm.states: |
| 425 | if other_state.action in callers: |
| 426 | other_state.add_out_edge(Edge(state, None, 'dotted')) |
| 427 | |
| 428 | def add_fsm_alloc(fsm, c_files): |
| 429 | |
| 430 | allocating_funcs = [] |
| 431 | for c_file in c_files: |
| 432 | allocating_funcs.extend(c_file.fsm_allocators.get(fsm.struct_name, [])) |
| 433 | |
| 434 | starting_state = None |
| 435 | if fsm.states: |
| 436 | # assume the first state starts |
| 437 | starting_state = fsm.states[0] |
| 438 | |
| 439 | additional_states = [] |
| 440 | for func_name in allocating_funcs: |
| 441 | fsm.add_special_state(additional_states, func_name, None, starting_state) |
| 442 | |
| 443 | fsm.states.extend(additional_states) |
| 444 | |
| 445 | def add_cross_fsm_links(fsm, fsms, c_files, fsm_meta): |
| 446 | for state in fsm.states: |
| 447 | if not state.action: |
| 448 | continue |
| 449 | if state.kind == KIND_FSM: |
| 450 | continue |
| 451 | callers = c_files.find_callers(state.action) |
| 452 | |
| 453 | if state.kind == KIND_FUNC: |
| 454 | callers.append(state.action) |
| 455 | |
| 456 | if not callers: |
| 457 | continue |
| 458 | |
| 459 | for caller in callers: |
| 460 | for calling_fsm in fsms: |
| 461 | if calling_fsm is fsm: |
| 462 | continue |
| 463 | calling_state = calling_fsm.find_state_by_action(caller) |
| 464 | if not calling_state: |
| 465 | continue |
| 466 | if calling_state.kind == KIND_FSM: |
| 467 | continue |
| 468 | |
| 469 | label = None |
| 470 | if state.kind == KIND_STATE: |
| 471 | label=fsm.struct_name + ': ' + state.short_name |
| 472 | edge_action = caller |
| 473 | if calling_state.action == edge_action: |
| 474 | edge_action = None |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 475 | calling_fsm.add_special_state(calling_fsm.states, fsm.dot_name, |
| 476 | calling_state, kind=KIND_FSM, edge_action=edge_action, label=' '.join(fsm.all_names())) |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 477 | |
| 478 | label = None |
| 479 | if calling_state.kind == KIND_STATE: |
| 480 | label=calling_fsm.struct_name + ': ' + calling_state.short_name |
| 481 | edge_action = caller |
| 482 | if state.action == edge_action: |
| 483 | edge_action = None |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 484 | fsm.add_special_state(fsm.states, calling_fsm.dot_name, None, |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 485 | state, kind=KIND_FSM, edge_action=edge_action, |
| 486 | label=label) |
| 487 | |
| 488 | # meta overview |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 489 | meta_called_fsm = fsm_meta.have_state(fsm.dot_name, KIND_FSM) |
| 490 | meta_calling_fsm = fsm_meta.have_state(calling_fsm.dot_name, KIND_FSM) |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 491 | meta_calling_fsm.add_out_edge(Edge(meta_called_fsm)) |
| 492 | |
| 493 | |
| 494 | def have_state(fsm, name, kind=KIND_STATE): |
| 495 | state = fsm.find_state_by_name(name) |
| 496 | if not state: |
| 497 | state = State() |
| 498 | state.name = name |
| 499 | state.short_name = name |
| 500 | state.kind = kind |
| 501 | fsm.states.append(state) |
| 502 | return state |
| 503 | |
| 504 | def to_dot(fsm): |
| 505 | out = ['digraph G {', 'rankdir=LR;'] |
| 506 | |
| 507 | for state in fsm.states: |
| 508 | out.append('%s [label="%s"%s]' % (state.short_name, state.get_label(), |
| 509 | state.shape_str())) |
| 510 | |
| 511 | for state in fsm.states: |
| 512 | for out_edge in state.out_edges: |
| 513 | attrs = [] |
| 514 | labels = [] |
| 515 | if out_edge.events: |
| 516 | labels.extend(out_edge.event_labels()) |
| 517 | if out_edge.actions: |
| 518 | labels.extend(out_edge.action_labels()) |
| 519 | if labels: |
| 520 | attrs.append('label="%s"' % (r'\n'.join(labels))) |
| 521 | if out_edge.style: |
| 522 | attrs.append('style=%s'% out_edge.style) |
| 523 | attrs_str = '' |
| 524 | if attrs: |
| 525 | attrs_str = ' [%s]' % (','.join(attrs)) |
| 526 | out.append('%s->%s%s' % (state.short_name, out_edge.to_state.short_name, attrs_str)) |
| 527 | |
| 528 | out.append('}\n') |
| 529 | |
| 530 | return '\n'.join(out) |
| 531 | |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 532 | def all_names(fsm): |
| 533 | n = [] |
| 534 | if fsm.from_file: |
| 535 | n.append(os.path.basename(fsm.from_file.path)) |
| 536 | if fsm.struct_name: |
| 537 | n.append(fsm.struct_name) |
| 538 | if fsm.string_name: |
| 539 | n.append(fsm.string_name) |
| 540 | return n |
| 541 | |
| 542 | def all_names_sanitized(fsm, sep='_'): |
| 543 | n = sep.join(fsm.all_names()) |
| 544 | n = re_insane_dot_name_chars.sub('_', n) |
| 545 | return n |
| 546 | |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 547 | def write_dot_file(fsm): |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 548 | dot_path = '%s.dot' % ('_'.join(fsm.all_names())) |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 549 | f = open(dot_path, 'w') |
| 550 | f.write(fsm.to_dot()) |
| 551 | f.close() |
| 552 | print(dot_path) |
| 553 | |
| 554 | |
| 555 | re_fsm = re.compile(r'struct osmo_fsm ([a-z_][a-z_0-9]*) =') |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 556 | re_fsm_string_name = re.compile(r'\bname = "([^"]*)"') |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 557 | re_fsm_states_struct_name = re.compile(r'\bstates = ([a-z_][a-z_0-9]*)\W*,') |
| 558 | re_fsm_states = re.compile(r'struct osmo_fsm_state ([a-z_][a-z_0-9]*)\[\] =') |
| 559 | re_func = re.compile(r'(\b[a-z_][a-z_0-9]*\b)\([^)]*\)\W*^{', re.MULTILINE) |
| 560 | re_state_trigger = re.compile(r'osmo_fsm_inst_state_chg\([^,]+,\W*([A-Z_][A-Z_0-9]*)\W*,', re.M) |
| 561 | re_fsm_alloc = re.compile(r'osmo_fsm_inst_alloc[_child]*\(\W*&([a-z_][a-z_0-9]*),', re.M) |
| 562 | re_fsm_event_dispatch = re.compile(r'osmo_fsm_inst_dispatch\(\W*[^,]+,\W*([A-Z_][A-Z_0-9]*)\W*,', re.M) |
| 563 | |
| 564 | class CFile(): |
| 565 | def __init__(c_file, path): |
| 566 | c_file.path = path |
| 567 | c_file.src = open(path).read() |
| 568 | c_file.funcs = {} |
| 569 | c_file.fsm_allocators = listdict() |
| 570 | |
| 571 | def extract_block(c_file, brace_open, brace_close, start): |
| 572 | pos = 0 |
| 573 | try: |
| 574 | src = c_file.src |
| 575 | block_start = src.find(brace_open, start) |
| 576 | |
| 577 | pos = block_start |
| 578 | level = 1 |
| 579 | while level > 0: |
| 580 | pos += 1 |
| 581 | if src[pos] == brace_open: |
| 582 | level += 1 |
| 583 | elif src[pos] == brace_close: |
| 584 | level -= 1 |
| 585 | |
| 586 | return src[block_start+1:pos] |
| 587 | except: |
| 588 | print("Error while trying to extract a code block from %r char pos %d" % (c_file.path, pos)) |
| 589 | print("Block start at char pos %d" % block_start) |
| 590 | try: |
| 591 | print(src[block_start - 20 : block_start + 20]) |
| 592 | print('...') |
| 593 | print(src[pos - 20 : pos + 20]) |
| 594 | except: |
| 595 | pass |
| 596 | return '' |
| 597 | |
| 598 | |
| 599 | def find_fsms(c_file): |
| 600 | fsms = [] |
| 601 | for m in re_fsm.finditer(c_file.src): |
| 602 | struct_name = m.group(1) |
| 603 | struct_def = c_file.extract_block('{', '}', m.start()) |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 604 | string_name = (re_fsm_string_name.findall(struct_def) or [None])[0] |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 605 | states_struct_name = re_fsm_states_struct_name.findall(struct_def)[0] |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 606 | fsm = Fsm(struct_name, string_name, states_struct_name, c_file) |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 607 | fsms.append(fsm) |
| 608 | return fsms |
| 609 | |
| 610 | def find_fsm_states(c_file, fsms): |
| 611 | for m in re_fsm_states.finditer(c_file.src): |
| 612 | states_struct_name = m.group(1) |
| 613 | for fsm in fsms: |
| 614 | if states_struct_name == fsm.states_struct_name: |
| 615 | fsm.parse_states(c_file.extract_block('{', '}', m.start())) |
| 616 | |
| 617 | def parse_functions(c_file): |
| 618 | funcs = {} |
| 619 | for m in re_func.finditer(c_file.src): |
| 620 | name = m.group(1) |
| 621 | func_src = c_file.extract_block('{', '}', m.start()) |
| 622 | funcs[name] = func_src |
| 623 | c_file.funcs = funcs |
| 624 | c_file.find_fsm_allocators() |
| 625 | |
| 626 | def find_callers(c_file, func_name): |
| 627 | func_call = func_name + '(' |
| 628 | callers = [] |
| 629 | for func_name, src in c_file.funcs.items(): |
| 630 | if src.find(func_call) >= 0: |
| 631 | callers.append(func_name) |
| 632 | return callers |
| 633 | |
| 634 | def find_fsm_allocators(c_file): |
| 635 | c_file.fsm_allocators = listdict() |
| 636 | for func_name, src in c_file.funcs.items(): |
| 637 | for m in re_fsm_alloc.finditer(src): |
| 638 | fsm_struct_name = m.group(1) |
| 639 | c_file.fsm_allocators.add(fsm_struct_name, func_name) |
| 640 | |
| 641 | def find_state_transitions(c_file, event_names): |
| 642 | TO_STATE = 'TO_STATE' |
| 643 | EVENT = 'EVENT' |
| 644 | func_to_state_transitions = listdict() |
| 645 | |
| 646 | for func_name, src in c_file.funcs.items(): |
| 647 | found_tokens = [] |
| 648 | |
| 649 | for m in re_state_trigger.finditer(src): |
| 650 | to_state = m.group(1) |
| 651 | found_tokens.append((m.start(), TO_STATE, to_state)) |
| 652 | |
| 653 | for event in event_names: |
| 654 | re_event = re.compile(r'\b(' + event + r')\b') |
| 655 | for m in re_event.finditer(src): |
| 656 | event = m.group(1) |
| 657 | found_tokens.append((m.start(), EVENT, event)) |
| 658 | |
| 659 | found_tokens = sorted(found_tokens) |
| 660 | |
| 661 | last_event = None |
| 662 | for start, kind, name in found_tokens: |
| 663 | if kind == EVENT: |
| 664 | last_event = name |
| 665 | else: |
| 666 | func_to_state_transitions.add(func_name, (name, last_event)) |
| 667 | |
| 668 | return func_to_state_transitions |
| 669 | |
| 670 | |
| 671 | def find_event_sources(c_file, event_names): |
| 672 | c_file.event_sources = listdict() |
| 673 | for func_name, src in c_file.funcs.items(): |
| 674 | for m in re_fsm_event_dispatch.finditer(src): |
| 675 | event_name = m.group(1) |
| 676 | c_file.event_sources.add(event_name, func_name) |
| 677 | |
| 678 | class CFiles(list): |
| 679 | |
| 680 | def find_callers(c_files, func_name): |
| 681 | callers = [] |
| 682 | for c_file in c_files: |
| 683 | callers.extend(c_file.find_callers(func_name)) |
| 684 | return callers |
| 685 | |
| 686 | def find_func_to_state_transitions(c_files): |
| 687 | func_to_state_transitions = listdict() |
| 688 | for c_file in c_files: |
| 689 | func_to_state_transitions.update( c_file.find_state_transitions(fsm.event_names) ) |
| 690 | return func_to_state_transitions |
| 691 | |
| 692 | def find_event_sources(c_files, event_names): |
| 693 | event_sources = listdict() |
| 694 | for c_file in c_files: |
| 695 | for event, sources in c_file.event_sources.items(): |
| 696 | if event in event_names: |
| 697 | event_sources.extend(event, sources) |
| 698 | return event_sources |
| 699 | |
| 700 | c_files = CFiles() |
| 701 | paths_seen = set() |
| 702 | for path in sys.argv[1:]: |
| 703 | if path in paths_seen: |
| 704 | continue |
| 705 | paths_seen.add(path) |
| 706 | c_file = CFile(path) |
| 707 | c_files.append(c_file) |
| 708 | |
| 709 | for c_file in c_files: |
| 710 | c_file.parse_functions() |
| 711 | |
| 712 | fsms = [] |
| 713 | for c_file in c_files: |
| 714 | fsms.extend(c_file.find_fsms()) |
| 715 | |
| 716 | for c_file in c_files: |
| 717 | c_file.find_fsm_states(fsms) |
| 718 | c_file.find_event_sources(fsms) |
| 719 | |
| 720 | for fsm in fsms: |
| 721 | fsm.find_event_edges(c_files) |
| 722 | fsm.add_fsm_alloc(c_files) |
| 723 | |
Neels Hofmeyr | a568af2 | 2017-10-23 04:03:19 +0200 | [diff] [blame] | 724 | fsm_meta = Fsm("meta", None, "meta") |
Neels Hofmeyr | 0898a00 | 2016-11-16 14:36:29 +0100 | [diff] [blame] | 725 | for fsm in fsms: |
| 726 | fsm.add_cross_fsm_links(fsms, c_files, fsm_meta) |
| 727 | |
| 728 | for fsm in fsms: |
| 729 | fsm.make_events_short_names() |
| 730 | |
| 731 | for fsm in fsms: |
| 732 | fsm.write_dot_file() |
| 733 | |
| 734 | fsm_meta.write_dot_file() |
| 735 | |
| 736 | |
| 737 | # vim: tabstop=2 shiftwidth=2 expandtab |