| 1 | # |
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| 2 | # Copyright (C) Lynn Tran, Jiachen Zhang 2018 |
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| 3 | # |
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| 4 | # utils-gdb.py -- |
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| 5 | # |
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| 6 | # Author : Lynn Tran |
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| 7 | # Created On : Mon Oct 1 22:06:09 2018 |
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| 8 | # Last Modified By : Peter A. Buhr |
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| 9 | # Last Modified On : Sat Jan 19 14:16:10 2019 |
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| 10 | # Update Count : 11 |
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| 11 | # |
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| 12 | |
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| 13 | """ |
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| 14 | To run this extension, the python name has to be as same as one of the loaded library |
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| 15 | Additionally, the file must exist in a folder which is in gdb's safe path |
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| 16 | """ |
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| 17 | import collections |
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| 18 | import gdb |
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| 19 | import re |
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| 20 | |
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| 21 | # set these signal handlers with some settings (nostop, noprint, pass) |
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| 22 | gdb.execute('handle SIGALRM nostop noprint pass') |
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| 23 | gdb.execute('handle SIGUSR1 nostop noprint pass') |
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| 24 | |
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| 25 | CfaTypes = collections.namedtuple('CfaTypes', 'cluster_ptr processor_ptr thread_ptr int_ptr thread_state') |
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| 26 | |
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| 27 | class ThreadInfo: |
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| 28 | tid = 0 |
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| 29 | cluster = None |
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| 30 | value = None |
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| 31 | |
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| 32 | def __init__(self, cluster, value): |
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| 33 | self.cluster = cluster |
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| 34 | self.value = value |
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| 35 | |
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| 36 | def is_system(self): |
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| 37 | return False |
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| 38 | |
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| 39 | # A named tuple representing information about a stack |
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| 40 | StackInfo = collections.namedtuple('StackInfo', 'sp fp pc') |
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| 41 | |
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| 42 | # A global variable to keep track of stack information as one switches from one |
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| 43 | # task to another task |
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| 44 | STACK = [] |
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| 45 | |
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| 46 | # A global variable to keep all system task name |
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| 47 | SysTask_Name = ["uLocalDebuggerReader", "uLocalDebugger", "uProcessorTask", "uBootTask", "uSystemTask", |
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| 48 | "uProcessorTask", "uPthread", "uProfiler"] |
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| 49 | |
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| 50 | not_supported_error_msg = "Not a supported command for this language" |
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| 51 | |
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| 52 | def is_cforall(): |
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| 53 | return True |
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| 54 | |
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| 55 | def get_cfa_types(): |
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| 56 | # GDB types for various structures/types in CFA |
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| 57 | return CfaTypes(cluster_ptr = gdb.lookup_type('struct cluster').pointer(), |
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| 58 | processor_ptr = gdb.lookup_type('struct processor').pointer(), |
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| 59 | thread_ptr = gdb.lookup_type('struct $thread').pointer(), |
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| 60 | int_ptr = gdb.lookup_type('int').pointer(), |
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| 61 | thread_state = gdb.lookup_type('enum __Coroutine_State')) |
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| 62 | |
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| 63 | def get_addr(addr): |
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| 64 | """ |
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| 65 | NOTE: sketchy solution to retrieve address. There is a better solution... |
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| 66 | @addr: str of an address that can be in a format 0xfffff <type of the object |
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| 67 | at this address> |
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| 68 | Return: str of just the address |
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| 69 | """ |
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| 70 | str_addr = str(addr) |
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| 71 | ending_addr_index = str_addr.find('<') |
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| 72 | if ending_addr_index == -1: |
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| 73 | return str(addr) |
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| 74 | return str_addr[:ending_addr_index].strip() |
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| 75 | |
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| 76 | def print_usage(obj): |
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| 77 | print(obj.__doc__) |
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| 78 | |
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| 79 | def parse(args): |
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| 80 | """ |
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| 81 | Split the argument list in string format, where each argument is separated |
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| 82 | by whitespace delimiter, to a list of arguments like argv |
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| 83 | @args: str of arguments |
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| 84 | Return: |
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| 85 | [] if args is an empty string |
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| 86 | list if args is not empty |
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| 87 | """ |
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| 88 | # parse the string format of arguments and return a list of arguments |
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| 89 | argv = args.split(' ') |
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| 90 | if len(argv) == 1 and argv[0] == '': |
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| 91 | return [] |
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| 92 | return argv |
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| 93 | |
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| 94 | def get_cluster_root(): |
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| 95 | """ |
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| 96 | Return: gdb.Value of globalClusters.root (is an address) |
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| 97 | """ |
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| 98 | cluster_root = gdb.parse_and_eval('_X11mainClusterPS7cluster_1') |
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| 99 | if cluster_root.address == 0x0: |
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| 100 | print('No clusters, program terminated') |
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| 101 | return cluster_root |
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| 102 | |
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| 103 | def find_curr_thread(): |
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| 104 | # btstr = gdb.execute('bt', to_string = True).splitlines() |
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| 105 | # if len(btstr) == 0: |
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| 106 | # print('error') |
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| 107 | # return None |
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| 108 | # return btstr[0].split('this=',1)[1].split(',')[0].split(')')[0] |
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| 109 | return None |
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| 110 | |
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| 111 | def all_clusters(): |
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| 112 | if not is_cforall(): |
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| 113 | return None |
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| 114 | |
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| 115 | cluster_root = get_cluster_root() |
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| 116 | if cluster_root.address == 0x0: |
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| 117 | return |
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| 118 | |
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| 119 | curr = cluster_root |
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| 120 | ret = [curr] |
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| 121 | |
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| 122 | while True: |
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| 123 | curr = curr['_X4nodeS26__cluster____dbg_node_cltr_1']['_X4nextPS7cluster_1'] |
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| 124 | if curr == cluster_root: |
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| 125 | break |
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| 126 | |
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| 127 | ret.append(curr) |
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| 128 | |
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| 129 | return ret |
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| 130 | |
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| 131 | |
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| 132 | def lookup_cluster(name = None): |
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| 133 | """ |
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| 134 | Look up a cluster given its ID |
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| 135 | @name: str |
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| 136 | Return: gdb.Value |
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| 137 | """ |
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| 138 | if not is_cforall(): |
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| 139 | return None |
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| 140 | |
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| 141 | root = get_cluster_root() |
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| 142 | if root.address == 0x0: |
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| 143 | return None |
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| 144 | |
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| 145 | if not name: |
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| 146 | return root |
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| 147 | |
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| 148 | # lookup for the task associated with the id |
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| 149 | cluster = None |
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| 150 | curr = root |
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| 151 | while True: |
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| 152 | if curr['_X4namePKc_1'].string() == name: |
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| 153 | cluster = curr.address |
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| 154 | break |
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| 155 | curr = curr['_X4nodeS26__cluster____dbg_node_cltr_1']['_X4nextPS7cluster_1'] |
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| 156 | if curr == root or curr == 0x0: |
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| 157 | break |
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| 158 | |
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| 159 | if not cluster: |
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| 160 | print("Cannot find a cluster with the name: {}.".format(name)) |
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| 161 | return None |
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| 162 | |
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| 163 | return cluster |
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| 164 | |
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| 165 | def lookup_threads_by_cluster(cluster): |
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| 166 | # Iterate through a circular linked list of threads and accumulate them in an array |
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| 167 | threads = [] |
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| 168 | |
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| 169 | cfa_t = get_cfa_types() |
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| 170 | root = cluster['_X7threadsS8__dllist_S7$thread__1']['_X4headPY15__TYPE_generic__1'].cast(cfa_t.thread_ptr) |
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| 171 | |
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| 172 | if root == 0x0 or root.address == 0x0: |
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| 173 | print('There are no tasks for cluster: {}'.format(cluster)) |
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| 174 | return threads |
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| 175 | |
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| 176 | curr = root |
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| 177 | tid = 0 |
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| 178 | sid = -1 |
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| 179 | |
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| 180 | while True: |
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| 181 | t = ThreadInfo(cluster, curr) |
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| 182 | if t.is_system(): |
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| 183 | t.tid = sid |
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| 184 | sid -= 1 |
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| 185 | else: |
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| 186 | t.tid = tid |
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| 187 | tid += 1 |
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| 188 | |
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| 189 | threads.append(t) |
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| 190 | |
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| 191 | curr = curr['node']['next'] |
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| 192 | if curr == root or curr == 0x0: |
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| 193 | break |
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| 194 | |
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| 195 | return threads |
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| 196 | |
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| 197 | def system_thread(thread): |
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| 198 | return False |
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| 199 | |
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| 200 | def adjust_stack(pc, fp, sp): |
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| 201 | # pop sp, fp, pc from global stack |
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| 202 | gdb.execute('set $pc = {}'.format(pc)) |
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| 203 | gdb.execute('set $rbp = {}'.format(fp)) |
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| 204 | gdb.execute('set $sp = {}'.format(sp)) |
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| 205 | |
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| 206 | ############################ COMMAND IMPLEMENTATION ######################### |
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| 207 | |
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| 208 | class Clusters(gdb.Command): |
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| 209 | """Cforall: Display currently known clusters |
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| 210 | Usage: |
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| 211 | info clusters : print out all the clusters |
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| 212 | """ |
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| 213 | |
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| 214 | def __init__(self): |
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| 215 | super(Clusters, self).__init__('info clusters', gdb.COMMAND_USER) |
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| 216 | |
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| 217 | def print_cluster(self, cluster_name, cluster_address): |
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| 218 | print('{:>20} {:>20}'.format(cluster_name, cluster_address)) |
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| 219 | |
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| 220 | #entry point from gdb |
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| 221 | def invoke(self, arg, from_tty): |
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| 222 | if not is_cforall(): |
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| 223 | return |
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| 224 | |
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| 225 | if arg: |
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| 226 | print("info clusters does not take arguments") |
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| 227 | print_usage(self) |
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| 228 | return |
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| 229 | |
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| 230 | self.print_cluster('Name', 'Address') |
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| 231 | |
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| 232 | for c in all_clusters(): |
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| 233 | self.print_cluster(c['_X4namePKc_1'].string(), str(c)) |
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| 234 | |
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| 235 | print("") |
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| 236 | |
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| 237 | ############ |
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| 238 | class Processors(gdb.Command): |
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| 239 | """Cforall: Display currently known processors |
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| 240 | Usage: |
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| 241 | info processors : print out all the processors in the Main Cluster |
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| 242 | info processors all : print out all processors in all clusters |
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| 243 | info processors <cluster_name> : print out all processors in a given cluster |
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| 244 | """ |
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| 245 | |
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| 246 | def __init__(self): |
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| 247 | super(Processors, self).__init__('info processors', gdb.COMMAND_USER) |
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| 248 | |
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| 249 | def print_processor(self, name, status, pending, address): |
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| 250 | print('{:>20} {:>11} {:>13} {:>20}'.format(name, status, pending, address)) |
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| 251 | |
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| 252 | def iterate_procs(self, root, active): |
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| 253 | if root == 0x0: |
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| 254 | return |
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| 255 | |
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| 256 | cfa_t = get_cfa_types() |
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| 257 | curr = root |
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| 258 | |
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| 259 | while True: |
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| 260 | processor = curr |
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| 261 | should_stop = processor['_X12do_terminateVb_1'] |
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| 262 | stop_count = processor['_X10terminatedS9semaphore_1']['_X5counti_1'] |
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| 263 | if not should_stop: |
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| 264 | status = 'Active' if active else 'Idle' |
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| 265 | else: |
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| 266 | status_str = 'Last Thread' if stop_count >= 0 else 'Terminating' |
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| 267 | status = '{}({},{})'.format(status_str, should_stop, stop_count) |
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| 268 | |
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| 269 | self.print_processor(processor['_X4namePKc_1'].string(), |
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| 270 | status, str(processor['_X18pending_preemptionb_1']), str(processor) |
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| 271 | ) |
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| 272 | |
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| 273 | curr = curr['_X4nodeS28__processor____dbg_node_proc_1']['_X4nextPS9processor_1'] |
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| 274 | |
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| 275 | if curr == root or curr == 0x0: |
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| 276 | break |
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| 277 | |
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| 278 | #entry point from gdb |
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| 279 | def invoke(self, arg, from_tty): |
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| 280 | if not is_cforall(): |
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| 281 | return |
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| 282 | |
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| 283 | if not arg: |
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| 284 | clusters = [lookup_cluster(None)] |
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| 285 | elif arg == "all": |
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| 286 | clusters = all_clusters() |
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| 287 | else: |
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| 288 | clusters = [lookup_cluster(arg)] |
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| 289 | |
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| 290 | if not clusters: |
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| 291 | print("No Cluster matching arguments found") |
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| 292 | return |
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| 293 | |
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| 294 | cfa_t = get_cfa_types() |
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| 295 | for cluster in clusters: |
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| 296 | print('Cluster: "{}"({})'.format(cluster['_X4namePKc_1'].string(), cluster.cast(cfa_t.cluster_ptr))) |
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| 297 | |
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| 298 | active_root = cluster.cast(cfa_t.cluster_ptr) \ |
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| 299 | ['_X5procsS8__dllist_S9processor__1'] \ |
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| 300 | ['_X4headPY15__TYPE_generic__1'] \ |
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| 301 | .cast(cfa_t.processor_ptr) |
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| 302 | |
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| 303 | idle_root = cluster.cast(cfa_t.cluster_ptr) \ |
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| 304 | ['_X5idlesS8__dllist_S9processor__1'] \ |
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| 305 | ['_X4headPY15__TYPE_generic__1'] \ |
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| 306 | .cast(cfa_t.processor_ptr) |
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| 307 | |
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| 308 | if idle_root != 0x0 or active_root != 0x0: |
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| 309 | self.print_processor('Name', 'Status', 'Pending Yield', 'Address') |
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| 310 | self.iterate_procs(active_root, True) |
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| 311 | self.iterate_procs(idle_root, False) |
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| 312 | else: |
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| 313 | print("No processors on cluster") |
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| 314 | |
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| 315 | print() |
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| 316 | |
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| 317 | ############ |
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| 318 | class Threads(gdb.Command): |
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| 319 | """Cforall: Display currently known threads |
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| 320 | Usage: |
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| 321 | cfathreads : print Main Cluster threads, application threads only |
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| 322 | cfathreads all : print all clusters, all threads |
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| 323 | cfathreads <clusterName> : print cluster threads, application threads only |
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| 324 | """ |
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| 325 | def __init__(self): |
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| 326 | # The first parameter of the line below is the name of the command. You |
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| 327 | # can call it 'uc++ task' |
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| 328 | super(Threads, self).__init__('info cfathreads', gdb.COMMAND_USER) |
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| 329 | |
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| 330 | def print_formatted(self, marked, tid, name, state, address): |
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| 331 | print('{:>1} {:>4} {:>20} {:>10} {:>20}'.format('*' if marked else ' ', tid, name, state, address)) |
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| 332 | |
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| 333 | def print_thread(self, thread, tid, marked): |
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| 334 | cfa_t = get_cfa_types() |
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| 335 | self.print_formatted(marked, tid, thread['self_cor']['name'].string(), str(thread['state'].cast(cfa_t.thread_state)), str(thread)) |
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| 336 | |
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| 337 | def print_threads_by_cluster(self, cluster, print_system = False): |
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| 338 | # Iterate through a circular linked list of tasks and print out its |
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| 339 | # name along with address associated to each cluster |
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| 340 | threads = lookup_threads_by_cluster(cluster) |
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| 341 | if not threads: |
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| 342 | return |
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| 343 | |
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| 344 | running_thread = find_curr_thread() |
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| 345 | if running_thread is None: |
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| 346 | print('Could not identify current thread') |
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| 347 | |
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| 348 | self.print_formatted(False, '', 'Name', 'State', 'Address') |
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| 349 | |
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| 350 | for t in threads: |
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| 351 | if not t.is_system() or print_system: |
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| 352 | self.print_thread(t.value, t.tid, t.value == running_thread if running_thread else False) |
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| 353 | |
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| 354 | print() |
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| 355 | |
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| 356 | def print_all_threads(self): |
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| 357 | for c in all_clusters(): |
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| 358 | self.print_threads_by_cluster(c, False) |
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| 359 | |
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| 360 | def invoke(self, arg, from_tty): |
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| 361 | """ |
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| 362 | @arg: str |
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| 363 | @from_tty: bool |
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| 364 | """ |
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| 365 | if not is_cforall(): |
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| 366 | return |
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| 367 | |
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| 368 | if not arg: |
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| 369 | cluster = lookup_cluster() |
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| 370 | if not cluster: |
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| 371 | print("Could not find Main Cluster") |
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| 372 | return |
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| 373 | |
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| 374 | # only tasks and main |
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| 375 | self.print_threads_by_cluster(cluster, False) |
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| 376 | |
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| 377 | elif arg == 'all': |
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| 378 | # all threads, all clusters |
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| 379 | self.print_all_threads() |
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| 380 | |
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| 381 | else: |
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| 382 | cluster = lookup_cluster(arg) |
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| 383 | if not cluster: |
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| 384 | print("Could not find cluster '{}'".format(arg)) |
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| 385 | return |
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| 386 | |
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| 387 | # all tasks, specified cluster |
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| 388 | self.print_threads_by_cluster(cluster, True) |
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| 389 | |
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| 390 | |
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| 391 | ############ |
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| 392 | class Thread(gdb.Command): |
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| 393 | """Cforall: Switch to specified user threads |
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| 394 | Usage: |
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| 395 | cfathread <id> : switch stack to thread id on main cluster |
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| 396 | cfathread 0x<address> : switch stack to thread on any cluster |
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| 397 | cfathread <id> <clusterName> : switch stack to thread on specified cluster |
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| 398 | """ |
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| 399 | def __init__(self): |
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| 400 | # The first parameter of the line below is the name of the command. You |
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| 401 | # can call it 'uc++ task' |
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| 402 | super(Thread, self).__init__('cfathread', gdb.COMMAND_USER) |
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| 403 | |
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| 404 | ############################ AUXILIARY FUNCTIONS ######################### |
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| 405 | |
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| 406 | def switchto(self, thread): |
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| 407 | """Change to a new task by switching to a different stack and manually |
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| 408 | adjusting sp, fp and pc |
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| 409 | @task_address: str |
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| 410 | 2 supported format: |
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| 411 | in hex format |
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| 412 | <hex_address>: literal hexadecimal address |
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| 413 | Ex: 0xffffff |
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| 414 | in name of the pointer to the task |
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| 415 | "task_name": pointer of the variable name of the cluster |
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| 416 | Ex: T* s -> task_name = s |
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| 417 | Return: gdb.value of the cluster's address |
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| 418 | """ |
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| 419 | try: |
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| 420 | if not gdb.lookup_symbol('__cfactx_switch'): |
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| 421 | print('__cfactx_switch symbol is unavailable') |
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| 422 | return |
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| 423 | except: |
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| 424 | print('here 3') |
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| 425 | |
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| 426 | cfa_t = get_cfa_types() |
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| 427 | |
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| 428 | state = thread['state'].cast(cfa_t.thread_state) |
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| 429 | try: |
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| 430 | if state == gdb.parse_and_eval('Halted'): |
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| 431 | print('Cannot switch to a terminated thread') |
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| 432 | return |
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| 433 | |
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| 434 | if state == gdb.parse_and_eval('Start'): |
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| 435 | print('Cannjot switch to a thread not yet run') |
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| 436 | return |
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| 437 | except: |
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| 438 | print("here 2") |
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| 439 | return |
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| 440 | |
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| 441 | |
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| 442 | context = thread['context'] |
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| 443 | |
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| 444 | # lookup for sp,fp and uSwitch |
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| 445 | xsp = context['SP'] + 48 |
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| 446 | xfp = context['FP'] |
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| 447 | |
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| 448 | # convert string so we can strip out the address |
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| 449 | try: |
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| 450 | xpc = get_addr(gdb.parse_and_eval('__cfactx_switch').address + 28) |
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| 451 | except: |
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| 452 | print("here") |
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| 453 | return |
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| 454 | |
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| 455 | # must be at frame 0 to set pc register |
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| 456 | gdb.execute('select-frame 0') |
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| 457 | |
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| 458 | # push sp, fp, pc into a global stack |
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| 459 | global STACK |
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| 460 | sp = gdb.parse_and_eval('$sp') |
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| 461 | fp = gdb.parse_and_eval('$fp') |
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| 462 | pc = gdb.parse_and_eval('$pc') |
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| 463 | stack_info = StackInfo(sp = sp, fp = fp, pc = pc) |
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| 464 | STACK.append(stack_info) |
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| 465 | |
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| 466 | # update registers for new task |
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| 467 | print('switching to ') |
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| 468 | gdb.execute('set $rsp={}'.format(xsp)) |
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| 469 | gdb.execute('set $rbp={}'.format(xfp)) |
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| 470 | gdb.execute('set $pc={}'.format(xpc)) |
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| 471 | |
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| 472 | def find_matching_gdb_thread_id(): |
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| 473 | """ |
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| 474 | Parse the str from info thread to get the number |
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| 475 | """ |
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| 476 | info_thread_str = gdb.execute('info thread', to_string=True).splitlines() |
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| 477 | for thread_str in info_thread_str: |
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| 478 | if thread_str.find('this={}'.format(task)) != -1: |
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| 479 | thread_id_pattern = r'^\*?\s+(\d+)\s+Thread' |
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| 480 | # retrive gdb thread id |
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| 481 | return re.match(thread_id_pattern, thread_str).group(1) |
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| 482 | |
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| 483 | # check if the task is running or not |
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| 484 | if task_state == gdb.parse_and_eval('uBaseTask::Running'): |
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| 485 | # find the equivalent thread from info thread |
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| 486 | gdb_thread_id = find_matching_gdb_thread_id() |
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| 487 | if gdb_thread_id is None: |
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| 488 | print('cannot find the thread id to switch to') |
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| 489 | return |
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| 490 | # switch to that thread based using thread command |
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| 491 | gdb.execute('thread {}'.format(gdb_thread_id)) |
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| 492 | |
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| 493 | def switchto_id(self, tid, cluster): |
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| 494 | """ |
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| 495 | @cluster: cluster object |
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| 496 | @tid: int |
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| 497 | """ |
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| 498 | threads = lookup_threads_by_cluster( cluster ) |
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| 499 | |
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| 500 | for t in threads: |
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| 501 | if t.tid == tid: |
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| 502 | self.switchto(t.value) |
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| 503 | return |
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| 504 | |
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| 505 | print("Cound not find thread by id '{}'".format(tid)) |
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| 506 | |
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| 507 | def invoke(self, arg, from_tty): |
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| 508 | """ |
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| 509 | @arg: str |
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| 510 | @from_tty: bool |
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| 511 | """ |
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| 512 | if not is_cforall(): |
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| 513 | return |
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| 514 | |
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| 515 | argv = parse(arg) |
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| 516 | print(argv) |
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| 517 | if argv[0].isdigit(): |
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| 518 | cname = " ".join(argv[1:]) if len(argv) > 1 else None |
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| 519 | cluster = lookup_cluster(cname) |
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| 520 | if not cluster: |
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| 521 | print("Could not find cluster '{}'".format(cname if cname else "Main Cluster")) |
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| 522 | return |
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| 523 | |
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| 524 | try: |
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| 525 | tid = int(argv[0]) |
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| 526 | except: |
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| 527 | print("'{}' not a valid thread id".format(argv[0])) |
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| 528 | print_usage(self) |
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| 529 | return |
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| 530 | |
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| 531 | # by id, userCluster |
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| 532 | self.switchto_id(tid, cluster) |
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| 533 | |
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| 534 | elif argv[0].startswith('0x') or argv[0].startswith('0X'): |
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| 535 | self.switchto(argv[0]) # by address, any cluster |
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| 536 | |
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| 537 | ############ |
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| 538 | class PrevThread(gdb.Command): |
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| 539 | """Switch back to previous task on the stack""" |
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| 540 | usage_msg = 'prevtask' |
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| 541 | |
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| 542 | def __init__(self): |
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| 543 | super(PrevThread, self).__init__('prevtask', gdb.COMMAND_USER) |
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| 544 | |
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| 545 | def invoke(self, arg, from_tty): |
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| 546 | """ |
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| 547 | @arg: str |
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| 548 | @from_tty: bool |
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| 549 | """ |
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| 550 | global STACK |
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| 551 | if len(STACK) != 0: |
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| 552 | # must be at frame 0 to set pc register |
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| 553 | gdb.execute('select-frame 0') |
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| 554 | |
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| 555 | # pop stack |
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| 556 | stack_info = STACK.pop() |
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| 557 | pc = get_addr(stack_info.pc) |
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| 558 | sp = stack_info.sp |
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| 559 | fp = stack_info.fp |
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| 560 | |
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| 561 | # pop sp, fp, pc from global stack |
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| 562 | adjust_stack(pc, fp, sp) |
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| 563 | |
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| 564 | # must be at C++ frame to access C++ vars |
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| 565 | gdb.execute('frame 1') |
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| 566 | else: |
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| 567 | print('empty stack') |
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| 568 | |
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| 569 | class ResetOriginFrame(gdb.Command): |
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| 570 | """Reset to the origin frame prior to continue execution again""" |
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| 571 | usage_msg = 'resetOriginFrame' |
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| 572 | def __init__(self): |
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| 573 | super(ResetOriginFrame, self).__init__('reset', gdb.COMMAND_USER) |
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| 574 | |
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| 575 | def invoke(self, arg, from_tty): |
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| 576 | """ |
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| 577 | @arg: str |
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| 578 | @from_tty: bool |
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| 579 | """ |
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| 580 | global STACK |
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| 581 | if len(STACK) != 0: |
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| 582 | stack_info = STACK.pop(0) |
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| 583 | STACK.clear() |
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| 584 | pc = get_addr(stack_info.pc) |
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| 585 | sp = stack_info.sp |
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| 586 | fp = stack_info.fp |
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| 587 | |
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| 588 | # pop sp, fp, pc from global stack |
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| 589 | adjust_stack(pc, fp, sp) |
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| 590 | |
|---|
| 591 | # must be at C++ frame to access C++ vars |
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| 592 | gdb.execute('frame 1') |
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| 593 | #else: |
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| 594 | #print('reset: empty stack') #probably does not have to print msg |
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| 595 | |
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| 596 | Clusters() |
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| 597 | Processors() |
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| 598 | ResetOriginFrame() |
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| 599 | PrevThread() |
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| 600 | Threads() |
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| 601 | Thread() |
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| 602 | |
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| 603 | # Local Variables: # |
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| 604 | # mode: Python # |
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| 605 | # End: # |
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