| 1 | # |
|---|
| 2 | # Copyright (C) Lynn Tran, Jiachen Zhang 2018 |
|---|
| 3 | # |
|---|
| 4 | # utils-gdb.py -- |
|---|
| 5 | # |
|---|
| 6 | # Author : Lynn Tran |
|---|
| 7 | # Created On : Mon Oct 1 22:06:09 2018 |
|---|
| 8 | # Last Modified By : Peter A. Buhr |
|---|
| 9 | # Last Modified On : Sat Jan 19 14:16:10 2019 |
|---|
| 10 | # Update Count : 11 |
|---|
| 11 | # |
|---|
| 12 | |
|---|
| 13 | """ |
|---|
| 14 | To run this extension, the python name has to be as same as one of the loaded library |
|---|
| 15 | Additionally, the file must exist in a folder which is in gdb's safe path |
|---|
| 16 | """ |
|---|
| 17 | import collections |
|---|
| 18 | import gdb |
|---|
| 19 | import re |
|---|
| 20 | |
|---|
| 21 | # set these signal handlers with some settings (nostop, noprint, pass) |
|---|
| 22 | gdb.execute('handle SIGALRM nostop noprint pass') |
|---|
| 23 | gdb.execute('handle SIGUSR1 nostop noprint pass') |
|---|
| 24 | |
|---|
| 25 | CfaTypes = collections.namedtuple('CfaTypes', 'cluster_ptr processor_ptr thread_ptr int_ptr thread_state') |
|---|
| 26 | |
|---|
| 27 | class ThreadInfo: |
|---|
| 28 | tid = 0 |
|---|
| 29 | cluster = None |
|---|
| 30 | value = None |
|---|
| 31 | |
|---|
| 32 | def __init__(self, cluster, value): |
|---|
| 33 | self.cluster = cluster |
|---|
| 34 | self.value = value |
|---|
| 35 | |
|---|
| 36 | def is_system(self): |
|---|
| 37 | return False |
|---|
| 38 | |
|---|
| 39 | # A named tuple representing information about a stack |
|---|
| 40 | StackInfo = collections.namedtuple('StackInfo', 'sp fp pc') |
|---|
| 41 | |
|---|
| 42 | # A global variable to keep track of stack information as one switches from one |
|---|
| 43 | # task to another task |
|---|
| 44 | STACK = [] |
|---|
| 45 | |
|---|
| 46 | not_supported_error_msg = "Not a supported command for this language" |
|---|
| 47 | |
|---|
| 48 | def is_cforall(): |
|---|
| 49 | return True |
|---|
| 50 | |
|---|
| 51 | def get_cfa_types(): |
|---|
| 52 | # GDB types for various structures/types in CFA |
|---|
| 53 | return CfaTypes(cluster_ptr = gdb.lookup_type('struct cluster').pointer(), |
|---|
| 54 | processor_ptr = gdb.lookup_type('struct processor').pointer(), |
|---|
| 55 | thread_ptr = gdb.lookup_type('struct $thread').pointer(), |
|---|
| 56 | int_ptr = gdb.lookup_type('int').pointer(), |
|---|
| 57 | thread_state = gdb.lookup_type('enum __Coroutine_State')) |
|---|
| 58 | |
|---|
| 59 | def get_addr(addr): |
|---|
| 60 | """ |
|---|
| 61 | NOTE: sketchy solution to retrieve address. There is a better solution... |
|---|
| 62 | @addr: str of an address that can be in a format 0xfffff <type of the object |
|---|
| 63 | at this address> |
|---|
| 64 | Return: str of just the address |
|---|
| 65 | """ |
|---|
| 66 | str_addr = str(addr) |
|---|
| 67 | ending_addr_index = str_addr.find('<') |
|---|
| 68 | if ending_addr_index == -1: |
|---|
| 69 | return str(addr) |
|---|
| 70 | return str_addr[:ending_addr_index].strip() |
|---|
| 71 | |
|---|
| 72 | def print_usage(obj): |
|---|
| 73 | print(obj.__doc__) |
|---|
| 74 | |
|---|
| 75 | def parse(args): |
|---|
| 76 | """ |
|---|
| 77 | Split the argument list in string format, where each argument is separated |
|---|
| 78 | by whitespace delimiter, to a list of arguments like argv |
|---|
| 79 | @args: str of arguments |
|---|
| 80 | Return: |
|---|
| 81 | [] if args is an empty string |
|---|
| 82 | list if args is not empty |
|---|
| 83 | """ |
|---|
| 84 | # parse the string format of arguments and return a list of arguments |
|---|
| 85 | argv = args.split(' ') |
|---|
| 86 | if len(argv) == 1 and argv[0] == '': |
|---|
| 87 | return [] |
|---|
| 88 | return argv |
|---|
| 89 | |
|---|
| 90 | def get_cluster_root(): |
|---|
| 91 | """ |
|---|
| 92 | Return: gdb.Value of globalClusters.root (is an address) |
|---|
| 93 | """ |
|---|
| 94 | cluster_root = gdb.parse_and_eval('_X11mainClusterPS7cluster_1') |
|---|
| 95 | if cluster_root.address == 0x0: |
|---|
| 96 | print('No clusters, program terminated') |
|---|
| 97 | return cluster_root |
|---|
| 98 | |
|---|
| 99 | def get_sched_lock(): |
|---|
| 100 | """ |
|---|
| 101 | Return: gdb.Value of __scheduler_lock |
|---|
| 102 | """ |
|---|
| 103 | lock = gdb.parse_and_eval('_X16__scheduler_lockPS20__scheduler_RWLock_t_1') |
|---|
| 104 | if lock.address == 0x0: |
|---|
| 105 | print('No scheduler lock, program terminated') |
|---|
| 106 | return lock |
|---|
| 107 | |
|---|
| 108 | def all_clusters(): |
|---|
| 109 | if not is_cforall(): |
|---|
| 110 | return None |
|---|
| 111 | |
|---|
| 112 | cluster_root = get_cluster_root() |
|---|
| 113 | if cluster_root.address == 0x0: |
|---|
| 114 | return |
|---|
| 115 | |
|---|
| 116 | curr = cluster_root |
|---|
| 117 | ret = [curr] |
|---|
| 118 | |
|---|
| 119 | while True: |
|---|
| 120 | curr = curr['_X4nodeS26__cluster____dbg_node_cltr_1']['_X4nextPS7cluster_1'] |
|---|
| 121 | if curr == cluster_root: |
|---|
| 122 | break |
|---|
| 123 | |
|---|
| 124 | ret.append(curr) |
|---|
| 125 | |
|---|
| 126 | return ret |
|---|
| 127 | |
|---|
| 128 | def all_processors(): |
|---|
| 129 | if not is_cforall(): |
|---|
| 130 | return None |
|---|
| 131 | |
|---|
| 132 | cfa_t = get_cfa_types() |
|---|
| 133 | |
|---|
| 134 | # get processors from registration to the RWlock |
|---|
| 135 | lock = get_sched_lock() |
|---|
| 136 | |
|---|
| 137 | #get number of elements |
|---|
| 138 | count = lock['_X5readyVj_1'] |
|---|
| 139 | |
|---|
| 140 | #find all the procs |
|---|
| 141 | raw_procs = [lock['_X4dataPS21__scheduler_lock_id_t_1'][i]['_X6handleVPS16__processor_id_t_1'] for i in range(count)] |
|---|
| 142 | |
|---|
| 143 | # pre cast full procs |
|---|
| 144 | procs = [p.cast(cfa_t.processor_ptr) for p in raw_procs if p['_X9full_procb_1']] |
|---|
| 145 | |
|---|
| 146 | # sort procs by clusters |
|---|
| 147 | return sorted(procs, key=lambda p: p['_X4cltrPS7cluster_1']) |
|---|
| 148 | |
|---|
| 149 | def tls_for_pthread(pthrd): |
|---|
| 150 | prev = gdb.selected_thread() |
|---|
| 151 | inf = gdb.selected_inferior() |
|---|
| 152 | |
|---|
| 153 | thrd = inf.thread_from_thread_handle( pthrd ) |
|---|
| 154 | thrd.switch() |
|---|
| 155 | tls = gdb.parse_and_eval('&_X9kernelTLSS16KernelThreadData_1') |
|---|
| 156 | |
|---|
| 157 | prev.switch() |
|---|
| 158 | return tls |
|---|
| 159 | |
|---|
| 160 | def tls_for_proc(proc): |
|---|
| 161 | return tls_for_pthread(proc['_X13kernel_threadm_1']) |
|---|
| 162 | |
|---|
| 163 | def thread_for_pthread(pthrd): |
|---|
| 164 | return tls_for_pthread(pthrd)['_X11this_threadVPS7$thread_1'] |
|---|
| 165 | |
|---|
| 166 | def thread_for_proc(proc): |
|---|
| 167 | return tls_for_proc(proc)['_X11this_threadVPS7$thread_1'] |
|---|
| 168 | |
|---|
| 169 | |
|---|
| 170 | |
|---|
| 171 | def find_curr_thread(): |
|---|
| 172 | # btstr = gdb.execute('bt', to_string = True).splitlines() |
|---|
| 173 | # if len(btstr) == 0: |
|---|
| 174 | # print('error') |
|---|
| 175 | # return None |
|---|
| 176 | # return btstr[0].split('this=',1)[1].split(',')[0].split(')')[0] |
|---|
| 177 | return None |
|---|
| 178 | |
|---|
| 179 | def lookup_cluster(name = None): |
|---|
| 180 | """ |
|---|
| 181 | Look up a cluster given its ID |
|---|
| 182 | @name: str |
|---|
| 183 | Return: gdb.Value |
|---|
| 184 | """ |
|---|
| 185 | if not is_cforall(): |
|---|
| 186 | return None |
|---|
| 187 | |
|---|
| 188 | root = get_cluster_root() |
|---|
| 189 | if root.address == 0x0: |
|---|
| 190 | return None |
|---|
| 191 | |
|---|
| 192 | if not name: |
|---|
| 193 | return root |
|---|
| 194 | |
|---|
| 195 | # lookup for the task associated with the id |
|---|
| 196 | cluster = None |
|---|
| 197 | curr = root |
|---|
| 198 | while True: |
|---|
| 199 | if curr['_X4namePKc_1'].string() == name: |
|---|
| 200 | cluster = curr.address |
|---|
| 201 | break |
|---|
| 202 | curr = curr['_X4nodeS26__cluster____dbg_node_cltr_1']['_X4nextPS7cluster_1'] |
|---|
| 203 | if curr == root or curr == 0x0: |
|---|
| 204 | break |
|---|
| 205 | |
|---|
| 206 | if not cluster: |
|---|
| 207 | print("Cannot find a cluster with the name: {}.".format(name)) |
|---|
| 208 | return None |
|---|
| 209 | |
|---|
| 210 | return cluster |
|---|
| 211 | |
|---|
| 212 | def lookup_threads_by_cluster(cluster): |
|---|
| 213 | # Iterate through a circular linked list of threads and accumulate them in an array |
|---|
| 214 | threads = [] |
|---|
| 215 | |
|---|
| 216 | cfa_t = get_cfa_types() |
|---|
| 217 | root = cluster['_X7threadsS8__dllist_S7$thread__1']['_X4headPY15__TYPE_generic__1'].cast(cfa_t.thread_ptr) |
|---|
| 218 | |
|---|
| 219 | if root == 0x0 or root.address == 0x0: |
|---|
| 220 | print('There are no tasks for cluster: {}'.format(cluster)) |
|---|
| 221 | return threads |
|---|
| 222 | |
|---|
| 223 | curr = root |
|---|
| 224 | tid = 0 |
|---|
| 225 | sid = -1 |
|---|
| 226 | |
|---|
| 227 | while True: |
|---|
| 228 | t = ThreadInfo(cluster, curr) |
|---|
| 229 | if t.is_system(): |
|---|
| 230 | t.tid = sid |
|---|
| 231 | sid -= 1 |
|---|
| 232 | else: |
|---|
| 233 | t.tid = tid |
|---|
| 234 | tid += 1 |
|---|
| 235 | |
|---|
| 236 | threads.append(t) |
|---|
| 237 | |
|---|
| 238 | curr = curr['node']['next'] |
|---|
| 239 | if curr == root or curr == 0x0: |
|---|
| 240 | break |
|---|
| 241 | |
|---|
| 242 | return threads |
|---|
| 243 | |
|---|
| 244 | def system_thread(thread): |
|---|
| 245 | return False |
|---|
| 246 | |
|---|
| 247 | def adjust_stack(pc, fp, sp): |
|---|
| 248 | # pop sp, fp, pc from global stack |
|---|
| 249 | gdb.execute('set $pc = {}'.format(pc)) |
|---|
| 250 | gdb.execute('set $rbp = {}'.format(fp)) |
|---|
| 251 | gdb.execute('set $sp = {}'.format(sp)) |
|---|
| 252 | |
|---|
| 253 | ############################ COMMAND IMPLEMENTATION ######################### |
|---|
| 254 | |
|---|
| 255 | class Clusters(gdb.Command): |
|---|
| 256 | """Cforall: Display currently known clusters |
|---|
| 257 | Usage: |
|---|
| 258 | info clusters : print out all the clusters |
|---|
| 259 | """ |
|---|
| 260 | |
|---|
| 261 | def __init__(self): |
|---|
| 262 | super(Clusters, self).__init__('info clusters', gdb.COMMAND_USER) |
|---|
| 263 | |
|---|
| 264 | def print_cluster(self, cluster_name, cluster_address): |
|---|
| 265 | print('{:>20} {:>20}'.format(cluster_name, cluster_address)) |
|---|
| 266 | |
|---|
| 267 | #entry point from gdb |
|---|
| 268 | def invoke(self, arg, from_tty): |
|---|
| 269 | if not is_cforall(): |
|---|
| 270 | return |
|---|
| 271 | |
|---|
| 272 | if arg: |
|---|
| 273 | print("info clusters does not take arguments") |
|---|
| 274 | print_usage(self) |
|---|
| 275 | return |
|---|
| 276 | |
|---|
| 277 | self.print_cluster('Name', 'Address') |
|---|
| 278 | |
|---|
| 279 | for c in all_clusters(): |
|---|
| 280 | self.print_cluster(c['_X4namePKc_1'].string(), str(c)) |
|---|
| 281 | |
|---|
| 282 | print("") |
|---|
| 283 | |
|---|
| 284 | ############ |
|---|
| 285 | class Processors(gdb.Command): |
|---|
| 286 | """Cforall: Display currently known processors |
|---|
| 287 | Usage: |
|---|
| 288 | info processors : print out all the processors |
|---|
| 289 | info processors <cluster_name> : print out all processors in a given cluster |
|---|
| 290 | """ |
|---|
| 291 | |
|---|
| 292 | def __init__(self): |
|---|
| 293 | super(Processors, self).__init__('info processors', gdb.COMMAND_USER) |
|---|
| 294 | |
|---|
| 295 | def print_processor(self, processor): |
|---|
| 296 | should_stop = processor['_X12do_terminateVb_1'] |
|---|
| 297 | if not should_stop: |
|---|
| 298 | midle = processor['_X6$linksS7$dlinks_S9processor__1']['_X4nextS9$mgd_link_Y13__tE_generic___1']['_X4elemPY13__tE_generic__1'] != 0x0 |
|---|
| 299 | end = processor['_X6$linksS7$dlinks_S9processor__1']['_X4nextS9$mgd_link_Y13__tE_generic___1']['_X10terminatorPv_1'] != 0x0 |
|---|
| 300 | |
|---|
| 301 | status = 'Idle' if midle or end else 'Active' |
|---|
| 302 | else: |
|---|
| 303 | stop_count = processor['_X10terminatedS9semaphore_1']['_X5counti_1'] |
|---|
| 304 | status_str = 'Last Thread' if stop_count >= 0 else 'Terminating' |
|---|
| 305 | status = '{}({},{})'.format(status_str, should_stop, stop_count) |
|---|
| 306 | |
|---|
| 307 | print('{:>20} {:>11} {:<7} {:<}'.format( |
|---|
| 308 | processor['_X4namePKc_1'].string(), |
|---|
| 309 | status, |
|---|
| 310 | str(processor['_X18pending_preemptionb_1']), |
|---|
| 311 | str(processor) |
|---|
| 312 | )) |
|---|
| 313 | tls = tls_for_proc( processor ) |
|---|
| 314 | thrd = tls['_X11this_threadVPS7$thread_1'] |
|---|
| 315 | if thrd != 0x0: |
|---|
| 316 | tname = '{} {}'.format(thrd['self_cor']['name'].string(), str(thrd)) |
|---|
| 317 | else: |
|---|
| 318 | tname = None |
|---|
| 319 | |
|---|
| 320 | print('{:>20} {}'.format('Thread', tname)) |
|---|
| 321 | print('{:>20} {}'.format('TLS', tls)) |
|---|
| 322 | |
|---|
| 323 | #entry point from gdb |
|---|
| 324 | def invoke(self, arg, from_tty): |
|---|
| 325 | if not is_cforall(): |
|---|
| 326 | return |
|---|
| 327 | |
|---|
| 328 | if not arg: |
|---|
| 329 | clusters = all_clusters() |
|---|
| 330 | else: |
|---|
| 331 | clusters = [lookup_cluster(arg)] |
|---|
| 332 | |
|---|
| 333 | if not clusters: |
|---|
| 334 | print("No Cluster matching arguments found") |
|---|
| 335 | return |
|---|
| 336 | |
|---|
| 337 | procs = all_processors() |
|---|
| 338 | |
|---|
| 339 | print('{:>20} {:>11} {:<7} {}'.format('Processor', '', 'Pending', 'Object')) |
|---|
| 340 | print('{:>20} {:>11} {:<7} {}'.format('Name', 'Status', 'Yield', 'Address')) |
|---|
| 341 | cl = None |
|---|
| 342 | for p in procs: |
|---|
| 343 | # if this is a different cluster print it |
|---|
| 344 | if cl != p['_X4cltrPS7cluster_1']: |
|---|
| 345 | if cl: |
|---|
| 346 | print() |
|---|
| 347 | cl = p['_X4cltrPS7cluster_1'] |
|---|
| 348 | print('Cluster {}'.format(cl['_X4namePKc_1'].string())) |
|---|
| 349 | |
|---|
| 350 | # print the processor information |
|---|
| 351 | self.print_processor(p) |
|---|
| 352 | |
|---|
| 353 | print() |
|---|
| 354 | |
|---|
| 355 | ############ |
|---|
| 356 | class Threads(gdb.Command): |
|---|
| 357 | """Cforall: Display currently known threads |
|---|
| 358 | Usage: |
|---|
| 359 | cfathreads : print Main Cluster threads, application threads only |
|---|
| 360 | cfathreads all : print all clusters, all threads |
|---|
| 361 | cfathreads <clusterName> : print cluster threads, application threads only |
|---|
| 362 | """ |
|---|
| 363 | def __init__(self): |
|---|
| 364 | # The first parameter of the line below is the name of the command. You |
|---|
| 365 | # can call it 'uc++ task' |
|---|
| 366 | super(Threads, self).__init__('info cfathreads', gdb.COMMAND_USER) |
|---|
| 367 | |
|---|
| 368 | def print_formatted(self, marked, tid, name, state, address): |
|---|
| 369 | print('{:>1} {:>4} {:>20} {:>10} {:>20}'.format('*' if marked else ' ', tid, name, state, address)) |
|---|
| 370 | |
|---|
| 371 | def print_thread(self, thread, tid, marked): |
|---|
| 372 | cfa_t = get_cfa_types() |
|---|
| 373 | self.print_formatted(marked, tid, thread['self_cor']['name'].string(), str(thread['state'].cast(cfa_t.thread_state)), str(thread)) |
|---|
| 374 | |
|---|
| 375 | def print_threads_by_cluster(self, cluster, print_system = False): |
|---|
| 376 | # Iterate through a circular linked list of tasks and print out its |
|---|
| 377 | # name along with address associated to each cluster |
|---|
| 378 | threads = lookup_threads_by_cluster(cluster) |
|---|
| 379 | if not threads: |
|---|
| 380 | return |
|---|
| 381 | |
|---|
| 382 | running_thread = find_curr_thread() |
|---|
| 383 | if running_thread is None: |
|---|
| 384 | print('Could not identify current thread') |
|---|
| 385 | |
|---|
| 386 | self.print_formatted(False, '', 'Name', 'State', 'Address') |
|---|
| 387 | |
|---|
| 388 | for t in threads: |
|---|
| 389 | if not t.is_system() or print_system: |
|---|
| 390 | self.print_thread(t.value, t.tid, t.value == running_thread if running_thread else False) |
|---|
| 391 | |
|---|
| 392 | print() |
|---|
| 393 | |
|---|
| 394 | def print_all_threads(self): |
|---|
| 395 | for c in all_clusters(): |
|---|
| 396 | self.print_threads_by_cluster(c, False) |
|---|
| 397 | |
|---|
| 398 | def invoke(self, arg, from_tty): |
|---|
| 399 | """ |
|---|
| 400 | @arg: str |
|---|
| 401 | @from_tty: bool |
|---|
| 402 | """ |
|---|
| 403 | if not is_cforall(): |
|---|
| 404 | return |
|---|
| 405 | |
|---|
| 406 | if not arg: |
|---|
| 407 | cluster = lookup_cluster() |
|---|
| 408 | if not cluster: |
|---|
| 409 | print("Could not find Main Cluster") |
|---|
| 410 | return |
|---|
| 411 | |
|---|
| 412 | # only tasks and main |
|---|
| 413 | self.print_threads_by_cluster(cluster, False) |
|---|
| 414 | |
|---|
| 415 | elif arg == 'all': |
|---|
| 416 | # all threads, all clusters |
|---|
| 417 | self.print_all_threads() |
|---|
| 418 | |
|---|
| 419 | else: |
|---|
| 420 | cluster = lookup_cluster(arg) |
|---|
| 421 | if not cluster: |
|---|
| 422 | print("Could not find cluster '{}'".format(arg)) |
|---|
| 423 | return |
|---|
| 424 | |
|---|
| 425 | # all tasks, specified cluster |
|---|
| 426 | self.print_threads_by_cluster(cluster, True) |
|---|
| 427 | |
|---|
| 428 | |
|---|
| 429 | ############ |
|---|
| 430 | class Thread(gdb.Command): |
|---|
| 431 | """Cforall: Switch to specified user threads |
|---|
| 432 | Usage: |
|---|
| 433 | cfathread <id> : switch stack to thread id on main cluster |
|---|
| 434 | cfathread 0x<address> : switch stack to thread on any cluster |
|---|
| 435 | cfathread <id> <clusterName> : switch stack to thread on specified cluster |
|---|
| 436 | """ |
|---|
| 437 | def __init__(self): |
|---|
| 438 | # The first parameter of the line below is the name of the command. You |
|---|
| 439 | # can call it 'uc++ task' |
|---|
| 440 | super(Thread, self).__init__('cfathread', gdb.COMMAND_USER) |
|---|
| 441 | |
|---|
| 442 | ############################ AUXILIARY FUNCTIONS ######################### |
|---|
| 443 | |
|---|
| 444 | def switchto(self, thread): |
|---|
| 445 | """Change to a new task by switching to a different stack and manually |
|---|
| 446 | adjusting sp, fp and pc |
|---|
| 447 | @task_address: str |
|---|
| 448 | 2 supported format: |
|---|
| 449 | in hex format |
|---|
| 450 | <hex_address>: literal hexadecimal address |
|---|
| 451 | Ex: 0xffffff |
|---|
| 452 | in name of the pointer to the task |
|---|
| 453 | "task_name": pointer of the variable name of the cluster |
|---|
| 454 | Ex: T* s -> task_name = s |
|---|
| 455 | Return: gdb.value of the cluster's address |
|---|
| 456 | """ |
|---|
| 457 | try: |
|---|
| 458 | if not gdb.lookup_symbol('__cfactx_switch'): |
|---|
| 459 | print('__cfactx_switch symbol is unavailable') |
|---|
| 460 | return |
|---|
| 461 | except: |
|---|
| 462 | print('here 3') |
|---|
| 463 | |
|---|
| 464 | cfa_t = get_cfa_types() |
|---|
| 465 | |
|---|
| 466 | state = thread['state'].cast(cfa_t.thread_state) |
|---|
| 467 | try: |
|---|
| 468 | if state == gdb.parse_and_eval('Halted'): |
|---|
| 469 | print('Cannot switch to a terminated thread') |
|---|
| 470 | return |
|---|
| 471 | |
|---|
| 472 | if state == gdb.parse_and_eval('Start'): |
|---|
| 473 | print('Cannjot switch to a thread not yet run') |
|---|
| 474 | return |
|---|
| 475 | except: |
|---|
| 476 | print("here 2") |
|---|
| 477 | return |
|---|
| 478 | |
|---|
| 479 | |
|---|
| 480 | context = thread['context'] |
|---|
| 481 | |
|---|
| 482 | |
|---|
| 483 | |
|---|
| 484 | # must be at frame 0 to set pc register |
|---|
| 485 | gdb.execute('select-frame 0') |
|---|
| 486 | if gdb.selected_frame().architecture().name() != 'i386:x86-64': |
|---|
| 487 | print('gdb debugging only supported for i386:x86-64 for now') |
|---|
| 488 | return |
|---|
| 489 | |
|---|
| 490 | # gdb seems to handle things much better if we pretend we just entered the context switch |
|---|
| 491 | # pretend the pc is __cfactx_switch and adjust the sp, base pointer doesn't need to change |
|---|
| 492 | # lookup for sp,fp and uSwitch |
|---|
| 493 | xsp = context['SP'] + 40 # 40 = 5 64bit registers : %r15, %r14, %r13, %r12, %rbx WARNING: x64 specific |
|---|
| 494 | xfp = context['FP'] |
|---|
| 495 | |
|---|
| 496 | # convert string so we can strip out the address |
|---|
| 497 | try: |
|---|
| 498 | xpc = get_addr(gdb.parse_and_eval('__cfactx_switch').address) |
|---|
| 499 | except: |
|---|
| 500 | print("here") |
|---|
| 501 | return |
|---|
| 502 | |
|---|
| 503 | # push sp, fp, pc into a global stack |
|---|
| 504 | global STACK |
|---|
| 505 | sp = gdb.parse_and_eval('$sp') |
|---|
| 506 | fp = gdb.parse_and_eval('$fp') |
|---|
| 507 | pc = gdb.parse_and_eval('$pc') |
|---|
| 508 | stack_info = StackInfo(sp = sp, fp = fp, pc = pc) |
|---|
| 509 | STACK.append(stack_info) |
|---|
| 510 | |
|---|
| 511 | # update registers for new task |
|---|
| 512 | # print('switching to {} ({}) : [{}, {}, {}]'.format(thread['self_cor']['name'].string(), str(thread), str(xsp), str(xfp), str(xpc))) |
|---|
| 513 | print('switching to thread {} ({})'.format(str(thread), thread['self_cor']['name'].string())) |
|---|
| 514 | gdb.execute('set $rsp={}'.format(xsp)) |
|---|
| 515 | gdb.execute('set $rbp={}'.format(xfp)) |
|---|
| 516 | gdb.execute('set $pc={}'.format(xpc)) |
|---|
| 517 | |
|---|
| 518 | def find_matching_gdb_thread_id(): |
|---|
| 519 | """ |
|---|
| 520 | Parse the str from info thread to get the number |
|---|
| 521 | """ |
|---|
| 522 | info_thread_str = gdb.execute('info thread', to_string=True).splitlines() |
|---|
| 523 | for thread_str in info_thread_str: |
|---|
| 524 | if thread_str.find('this={}'.format(task)) != -1: |
|---|
| 525 | thread_id_pattern = r'^\*?\s+(\d+)\s+Thread' |
|---|
| 526 | # retrive gdb thread id |
|---|
| 527 | return re.match(thread_id_pattern, thread_str).group(1) |
|---|
| 528 | |
|---|
| 529 | # check if the task is running or not |
|---|
| 530 | if task_state == gdb.parse_and_eval('uBaseTask::Running'): |
|---|
| 531 | # find the equivalent thread from info thread |
|---|
| 532 | gdb_thread_id = find_matching_gdb_thread_id() |
|---|
| 533 | if gdb_thread_id is None: |
|---|
| 534 | print('cannot find the thread id to switch to') |
|---|
| 535 | return |
|---|
| 536 | # switch to that thread based using thread command |
|---|
| 537 | gdb.execute('thread {}'.format(gdb_thread_id)) |
|---|
| 538 | |
|---|
| 539 | def switchto_id(self, tid, cluster): |
|---|
| 540 | """ |
|---|
| 541 | @cluster: cluster object |
|---|
| 542 | @tid: int |
|---|
| 543 | """ |
|---|
| 544 | threads = lookup_threads_by_cluster( cluster ) |
|---|
| 545 | |
|---|
| 546 | for t in threads: |
|---|
| 547 | if t.tid == tid: |
|---|
| 548 | self.switchto(t.value) |
|---|
| 549 | return |
|---|
| 550 | |
|---|
| 551 | print("Cound not find thread by id '{}'".format(tid)) |
|---|
| 552 | |
|---|
| 553 | def invoke(self, arg, from_tty): |
|---|
| 554 | """ |
|---|
| 555 | @arg: str |
|---|
| 556 | @from_tty: bool |
|---|
| 557 | """ |
|---|
| 558 | if not is_cforall(): |
|---|
| 559 | return |
|---|
| 560 | |
|---|
| 561 | argv = parse(arg) |
|---|
| 562 | if argv[0].isdigit(): |
|---|
| 563 | cname = " ".join(argv[1:]) if len(argv) > 1 else None |
|---|
| 564 | cluster = lookup_cluster(cname) |
|---|
| 565 | if not cluster: |
|---|
| 566 | print("Could not find cluster '{}'".format(cname if cname else "Main Cluster")) |
|---|
| 567 | return |
|---|
| 568 | |
|---|
| 569 | try: |
|---|
| 570 | tid = int(argv[0]) |
|---|
| 571 | except: |
|---|
| 572 | print("'{}' not a valid thread id".format(argv[0])) |
|---|
| 573 | print_usage(self) |
|---|
| 574 | return |
|---|
| 575 | |
|---|
| 576 | # by id, userCluster |
|---|
| 577 | self.switchto_id(tid, cluster) |
|---|
| 578 | |
|---|
| 579 | elif argv[0].startswith('0x') or argv[0].startswith('0X'): |
|---|
| 580 | self.switchto(argv[0]) # by address, any cluster |
|---|
| 581 | |
|---|
| 582 | ############ |
|---|
| 583 | class PrevThread(gdb.Command): |
|---|
| 584 | """Switch back to previous task on the stack""" |
|---|
| 585 | usage_msg = 'prevtask' |
|---|
| 586 | |
|---|
| 587 | def __init__(self): |
|---|
| 588 | super(PrevThread, self).__init__('prevtask', gdb.COMMAND_USER) |
|---|
| 589 | |
|---|
| 590 | def invoke(self, arg, from_tty): |
|---|
| 591 | """ |
|---|
| 592 | @arg: str |
|---|
| 593 | @from_tty: bool |
|---|
| 594 | """ |
|---|
| 595 | global STACK |
|---|
| 596 | if len(STACK) != 0: |
|---|
| 597 | # must be at frame 0 to set pc register |
|---|
| 598 | gdb.execute('select-frame 0') |
|---|
| 599 | |
|---|
| 600 | # pop stack |
|---|
| 601 | stack_info = STACK.pop() |
|---|
| 602 | pc = get_addr(stack_info.pc) |
|---|
| 603 | sp = stack_info.sp |
|---|
| 604 | fp = stack_info.fp |
|---|
| 605 | |
|---|
| 606 | # pop sp, fp, pc from global stack |
|---|
| 607 | adjust_stack(pc, fp, sp) |
|---|
| 608 | |
|---|
| 609 | # must be at C++ frame to access C++ vars |
|---|
| 610 | gdb.execute('frame 1') |
|---|
| 611 | else: |
|---|
| 612 | print('empty stack') |
|---|
| 613 | |
|---|
| 614 | class ResetOriginFrame(gdb.Command): |
|---|
| 615 | """Reset to the origin frame prior to continue execution again""" |
|---|
| 616 | usage_msg = 'resetOriginFrame' |
|---|
| 617 | def __init__(self): |
|---|
| 618 | super(ResetOriginFrame, self).__init__('reset', gdb.COMMAND_USER) |
|---|
| 619 | |
|---|
| 620 | def invoke(self, arg, from_tty): |
|---|
| 621 | """ |
|---|
| 622 | @arg: str |
|---|
| 623 | @from_tty: bool |
|---|
| 624 | """ |
|---|
| 625 | global STACK |
|---|
| 626 | if len(STACK) != 0: |
|---|
| 627 | stack_info = STACK.pop(0) |
|---|
| 628 | STACK.clear() |
|---|
| 629 | pc = get_addr(stack_info.pc) |
|---|
| 630 | sp = stack_info.sp |
|---|
| 631 | fp = stack_info.fp |
|---|
| 632 | |
|---|
| 633 | # pop sp, fp, pc from global stack |
|---|
| 634 | adjust_stack(pc, fp, sp) |
|---|
| 635 | |
|---|
| 636 | # must be at C++ frame to access C++ vars |
|---|
| 637 | gdb.execute('frame 1') |
|---|
| 638 | #else: |
|---|
| 639 | #print('reset: empty stack') #probably does not have to print msg |
|---|
| 640 | |
|---|
| 641 | Clusters() |
|---|
| 642 | Processors() |
|---|
| 643 | ResetOriginFrame() |
|---|
| 644 | PrevThread() |
|---|
| 645 | Threads() |
|---|
| 646 | Thread() |
|---|
| 647 | |
|---|
| 648 | # Local Variables: # |
|---|
| 649 | # mode: Python # |
|---|
| 650 | # End: # |
|---|
