| 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 |  | 
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| 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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