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 yield_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 | not_supported_error_msg = "Not a supported command for this language" |
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47 | |
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48 | def is_cforall(): |
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49 | return True |
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50 | |
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51 | def get_cfa_types(): |
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52 | # GDB types for various structures/types in CFA |
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53 | return CfaTypes(cluster_ptr = gdb.lookup_type('struct cluster').pointer(), |
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54 | processor_ptr = gdb.lookup_type('struct processor').pointer(), |
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55 | thread_ptr = gdb.lookup_type('struct thread$').pointer(), |
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56 | int_ptr = gdb.lookup_type('int').pointer(), |
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57 | thread_state = gdb.lookup_type('enum __Coroutine_State'), |
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58 | yield_state = gdb.lookup_type('enum __Preemption_Reason')) |
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59 | |
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60 | def get_addr(addr): |
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61 | """ |
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62 | NOTE: sketchy solution to retrieve address. There is a better solution... |
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63 | @addr: str of an address that can be in a format 0xfffff <type of the object |
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64 | at this address> |
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65 | Return: str of just the address |
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66 | """ |
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67 | str_addr = str(addr) |
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68 | ending_addr_index = str_addr.find('<') |
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69 | if ending_addr_index == -1: |
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70 | return str(addr) |
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71 | return str_addr[:ending_addr_index].strip() |
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72 | |
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73 | def print_usage(obj): |
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74 | print(obj.__doc__) |
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75 | |
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76 | def parse(args): |
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77 | """ |
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78 | Split the argument list in string format, where each argument is separated |
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79 | by whitespace delimiter, to a list of arguments like argv |
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80 | @args: str of arguments |
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81 | Return: |
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82 | [] if args is an empty string |
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83 | list if args is not empty |
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84 | """ |
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85 | # parse the string format of arguments and return a list of arguments |
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86 | argv = args.split(' ') |
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87 | if len(argv) == 1 and argv[0] == '': |
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88 | return [] |
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89 | return argv |
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90 | |
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91 | class ClusterIter: |
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92 | def __init__(self, root): |
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93 | self.curr = None |
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94 | self.root = root |
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95 | |
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96 | def __iter__(self): |
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97 | return self |
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98 | |
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99 | def __next__(self): |
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100 | # Clusters form a cycle |
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101 | # If we haven't seen the root yet, then the root is the first |
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102 | if not self.curr: |
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103 | self.curr = self.root |
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104 | return self.curr |
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105 | |
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106 | # if we already saw the root, then go forward |
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107 | self.curr = self.curr['_X4nodeS26__cluster____dbg_node_cltr_1']['_X4nextPS7cluster_1'] |
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108 | |
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109 | # if we reached the root again, then we are done |
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110 | if self.curr == self.root: |
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111 | raise StopIteration |
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112 | |
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113 | # otherwise return the next |
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114 | return self.curr |
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115 | |
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116 | def all_clusters(): |
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117 | """ |
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118 | Return: a list of all the clusters as an iterator. |
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119 | obtained from gdb.Value of globalClusters.root (is an address) |
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120 | """ |
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121 | if not is_cforall(): |
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122 | return [] |
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123 | |
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124 | cluster_root = gdb.parse_and_eval('_X11mainClusterPS7cluster_1') |
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125 | if cluster_root.address == 0x0: |
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126 | print('No clusters, program terminated') |
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127 | return [] |
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128 | |
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129 | return ClusterIter(cluster_root) |
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130 | |
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131 | class ProcIter: |
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132 | def __init__(self, root): |
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133 | self.curr = None |
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134 | self.root = root |
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135 | |
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136 | def __iter__(self): |
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137 | return self |
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138 | |
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139 | def check(self): |
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140 | # check if this is the last value |
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141 | addr = int(self.curr) |
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142 | mask = 1 << ((8 * int(gdb.parse_and_eval('sizeof(void*)'))) - 1) |
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143 | if 0 != (mask & addr): |
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144 | raise StopIteration |
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145 | |
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146 | def __next__(self): |
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147 | cfa_t = get_cfa_types() |
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148 | |
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149 | # Processors form a cycle |
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150 | # If we haven't seen the root yet, then the root is the first |
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151 | if not self.curr: |
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152 | my_next = self.root |
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153 | self.curr = my_next.cast(cfa_t.processor_ptr) |
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154 | |
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155 | #check if this is an empty list |
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156 | self.check() |
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157 | |
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158 | return self.curr |
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159 | |
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160 | # if we already saw the root, then go forward |
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161 | my_next = self.curr['_X4link']['_X4nextPY13__tE_generic__1'] |
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162 | self.curr = my_next.cast(cfa_t.processor_ptr) |
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163 | |
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164 | #check if we reached the end |
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165 | self.check() |
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166 | |
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167 | # otherwise return the next |
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168 | return self.curr |
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169 | |
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170 | def start_from_dlist(dlist): |
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171 | fs = dlist.type.fields() |
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172 | if len(fs) != 1: |
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173 | print("Error, can't understand dlist type for", dlist, dlist.name, dlist.type) |
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174 | return None |
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175 | |
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176 | return dlist[fs[0]] |
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177 | |
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178 | def proc_list(cluster): |
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179 | """ |
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180 | Return: for a given processor, return the active and idle processors, as 2 iterators |
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181 | """ |
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182 | cfa_t = get_cfa_types() |
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183 | proclist = cluster['_X5procsS19__cluster_proc_list_1'] |
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184 | |
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185 | idle = start_from_dlist(proclist['_X5idlesS5dlist_S9processorS5dlink_S9processor___1']) |
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186 | active = start_from_dlist(proclist['_X7activesS5dlist_S9processorS5dlink_S9processor___1']) |
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187 | return ProcIter(active.cast(cfa_t.processor_ptr)), ProcIter(idle.cast(cfa_t.processor_ptr)) |
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188 | |
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189 | def all_processors(): |
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190 | procs = [] |
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191 | for c in all_clusters(): |
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192 | active, idle = proc_list(c) |
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193 | for p in active: |
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194 | procs.append(p) |
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195 | |
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196 | for p in idle: |
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197 | procs.append(p) |
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198 | |
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199 | print(procs) |
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200 | return procs |
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201 | |
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202 | def tls_for_pthread(pthrd): |
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203 | prev = gdb.selected_thread() |
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204 | inf = gdb.selected_inferior() |
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205 | |
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206 | thrd = inf.thread_from_thread_handle( pthrd ) |
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207 | thrd.switch() |
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208 | tls = gdb.parse_and_eval('&_X9kernelTLSS16KernelThreadData_1') |
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209 | |
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210 | prev.switch() |
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211 | return tls |
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212 | |
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213 | def tls_for_proc(proc): |
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214 | return proc['_X10local_dataPS16KernelThreadData_1'] |
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215 | |
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216 | def thread_for_pthread(pthrd): |
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217 | return tls_for_pthread(pthrd)['_X11this_threadVPS7thread$_1'] |
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218 | |
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219 | def thread_for_proc(proc): |
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220 | return tls_for_proc(proc)['_X11this_threadVPS7thread$_1'] |
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221 | |
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222 | |
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223 | |
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224 | def find_curr_thread(): |
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225 | # btstr = gdb.execute('bt', to_string = True).splitlines() |
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226 | # if len(btstr) == 0: |
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227 | # print('error') |
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228 | # return None |
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229 | # return btstr[0].split('this=',1)[1].split(',')[0].split(')')[0] |
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230 | return None |
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231 | |
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232 | def lookup_cluster(name = None): |
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233 | """ |
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234 | Look up one or more cluster given a name |
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235 | @name: str |
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236 | Return: gdb.Value |
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237 | """ |
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238 | if not is_cforall(): |
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239 | return None |
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240 | |
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241 | clusters = all_clusters() |
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242 | if not clusters: |
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243 | return None |
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244 | |
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245 | if not name: |
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246 | return clusters.root |
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247 | |
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248 | # lookup for the task associated with the id |
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249 | found = [c for c in clusters if c['_X4namePKc_1'].string() == name] |
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250 | |
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251 | if not found: |
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252 | print("Cannot find a cluster with the name: {}.".format(name)) |
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253 | return None |
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254 | |
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255 | return found |
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256 | |
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257 | |
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258 | def lookup_threads_by_cluster(cluster): |
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259 | # Iterate through a circular linked list of threads and accumulate them in an array |
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260 | threads = [] |
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261 | |
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262 | cfa_t = get_cfa_types() |
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263 | root = cluster['_X7threadsS8__dllist_S7thread$__1']['_X4headPY15__TYPE_generic__1'].cast(cfa_t.thread_ptr) |
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264 | |
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265 | if root == 0x0 or root.address == 0x0: |
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266 | print('There are no tasks for cluster: {}'.format(cluster)) |
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267 | return threads |
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268 | |
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269 | curr = root |
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270 | tid = 0 |
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271 | sid = -1 |
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272 | |
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273 | while True: |
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274 | t = ThreadInfo(cluster, curr) |
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275 | if t.is_system(): |
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276 | t.tid = sid |
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277 | sid -= 1 |
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278 | else: |
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279 | t.tid = tid |
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280 | tid += 1 |
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281 | |
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282 | threads.append(t) |
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283 | |
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284 | curr = curr['node']['next'] |
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285 | if curr == root or curr == 0x0: |
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286 | break |
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287 | |
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288 | return threads |
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289 | |
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290 | def system_thread(thread): |
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291 | return False |
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292 | |
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293 | def adjust_stack(pc, fp, sp): |
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294 | # pop sp, fp, pc from global stack |
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295 | gdb.execute('set $pc = {}'.format(pc)) |
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296 | gdb.execute('set $rbp = {}'.format(fp)) |
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297 | gdb.execute('set $sp = {}'.format(sp)) |
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298 | |
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299 | ############################ COMMAND IMPLEMENTATION ######################### |
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300 | |
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301 | class Clusters(gdb.Command): |
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302 | """Cforall: Display currently known clusters |
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303 | Usage: |
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304 | info clusters : print out all the clusters |
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305 | """ |
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306 | |
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307 | def __init__(self): |
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308 | super(Clusters, self).__init__('info clusters', gdb.COMMAND_USER) |
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309 | |
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310 | def print_cluster(self, cluster_name, cluster_address): |
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311 | print('{:>20} {:>20}'.format(cluster_name, cluster_address)) |
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312 | |
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313 | #entry point from gdb |
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314 | def invoke(self, arg, from_tty): |
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315 | if not is_cforall(): |
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316 | return |
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317 | |
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318 | if arg: |
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319 | print("info clusters does not take arguments") |
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320 | print_usage(self) |
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321 | return |
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322 | |
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323 | self.print_cluster('Name', 'Address') |
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324 | |
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325 | for c in all_clusters(): |
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326 | self.print_cluster(c['_X4namePKc_1'].string(), str(c)) |
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327 | |
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328 | print("") |
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329 | |
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330 | ############ |
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331 | class Processors(gdb.Command): |
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332 | """Cforall: Display currently known processors |
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333 | Usage: |
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334 | info processors : print out all the processors |
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335 | info processors <cluster_name> : print out all processors in a given cluster |
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336 | """ |
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337 | |
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338 | def __init__(self): |
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339 | super(Processors, self).__init__('info processors', gdb.COMMAND_USER) |
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340 | |
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341 | def print_processor(self, processor, in_stats): |
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342 | should_stop = processor['_X12do_terminateVb_1'] |
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343 | if not should_stop: |
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344 | status = in_stats |
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345 | else: |
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346 | stop_count = processor['_X10terminatedS9semaphore_1']['_X5counti_1'] |
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347 | status_str = 'Last Thread' if stop_count >= 0 else 'Terminating' |
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348 | status = '{}({},{})'.format(status_str, should_stop, stop_count) |
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349 | |
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350 | print('{:>20} {:>11} {:<7} {:<}'.format( |
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351 | processor['_X4namePKc_1'].string(), |
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352 | status, |
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353 | str(processor['_X18pending_preemptionb_1']), |
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354 | str(processor) |
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355 | )) |
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356 | tls = tls_for_proc( processor ) |
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357 | thrd = tls['_X11this_threadVPS7thread$_1'] |
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358 | if thrd != 0x0: |
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359 | tname = '{} {}'.format(thrd['self_cor']['name'].string(), str(thrd)) |
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360 | else: |
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361 | tname = None |
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362 | |
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363 | print('{:>20} {}'.format('Thread', tname)) |
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364 | print('{:>20} {}'.format('TLS', tls)) |
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365 | |
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366 | #entry point from gdb |
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367 | def invoke(self, arg, from_tty): |
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368 | if not is_cforall(): |
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369 | return |
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370 | |
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371 | if not arg: |
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372 | clusters = all_clusters() |
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373 | else: |
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374 | clusters = [lookup_cluster(arg)] |
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375 | |
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376 | if not clusters: |
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377 | print("No Cluster matching arguments found") |
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378 | return |
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379 | |
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380 | print('{:>20} {:>11} {:<7} {}'.format('Processor', '', 'Pending', 'Object')) |
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381 | print('{:>20} {:>11} {:<7} {}'.format('Name', 'Status', 'Yield', 'Address')) |
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382 | for c in clusters: |
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383 | print('Cluster {}'.format(c['_X4namePKc_1'].string())) |
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384 | |
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385 | active, idle = proc_list(c) |
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386 | # print the processor information |
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387 | for p in active: |
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388 | self.print_processor(p, 'Active') |
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389 | |
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390 | for p in idle: |
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391 | self.print_processor(p, 'Idle') |
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392 | |
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393 | print() |
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394 | |
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395 | print() |
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396 | |
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397 | ############ |
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398 | class Threads(gdb.Command): |
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399 | """Cforall: Display currently known threads |
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400 | Usage: |
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401 | cfathreads : print Main Cluster threads, application threads only |
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402 | cfathreads all : print all clusters, all threads |
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403 | cfathreads <clusterName> : print cluster threads, application threads only |
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404 | """ |
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405 | def __init__(self): |
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406 | # The first parameter of the line below is the name of the command. You |
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407 | # can call it 'uc++ task' |
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408 | super(Threads, self).__init__('info cfathreads', gdb.COMMAND_USER) |
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409 | |
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410 | def print_formatted(self, marked, tid, name, state, address): |
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411 | print('{:>1} {:>4} {:>20} {:>10} {:>20}'.format('*' if marked else ' ', tid, name, state, address)) |
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412 | |
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413 | def print_thread(self, thread, tid, marked): |
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414 | cfa_t = get_cfa_types() |
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415 | ys = str(thread['preempted'].cast(cfa_t.yield_state)) |
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416 | if ys == '_X15__NO_PREEMPTIONKM19__Preemption_Reason_1': |
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417 | state = str(thread['state'].cast(cfa_t.thread_state)) |
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418 | elif ys == '_X18__ALARM_PREEMPTIONKM19__Preemption_Reason_1': |
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419 | state = 'preempted' |
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420 | elif ys == '_X19__MANUAL_PREEMPTIONKM19__Preemption_Reason_1': |
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421 | state = 'yield' |
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422 | elif ys == '_X17__POLL_PREEMPTIONKM19__Preemption_Reason_1': |
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423 | state = 'poll' |
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424 | else: |
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425 | print("error: thread {} in undefined preemption state {}".format(thread, ys)) |
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426 | state = 'error' |
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427 | self.print_formatted(marked, tid, thread['self_cor']['name'].string(), state, str(thread)) |
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428 | |
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429 | def print_threads_by_cluster(self, cluster, print_system = False): |
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430 | # Iterate through a circular linked list of tasks and print out its |
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431 | # name along with address associated to each cluster |
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432 | threads = lookup_threads_by_cluster(cluster) |
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433 | if not threads: |
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434 | return |
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435 | |
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436 | running_thread = find_curr_thread() |
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437 | if running_thread is None: |
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438 | print('Could not identify current thread') |
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439 | |
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440 | self.print_formatted(False, '', 'Name', 'State', 'Address') |
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441 | |
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442 | for t in threads: |
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443 | if not t.is_system() or print_system: |
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444 | self.print_thread(t.value, t.tid, t.value == running_thread if running_thread else False) |
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445 | |
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446 | print() |
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447 | |
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448 | def print_all_threads(self): |
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449 | for c in all_clusters(): |
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450 | self.print_threads_by_cluster(c, False) |
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451 | |
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452 | def invoke(self, arg, from_tty): |
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453 | """ |
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454 | @arg: str |
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455 | @from_tty: bool |
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456 | """ |
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457 | if not is_cforall(): |
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458 | return |
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459 | |
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460 | if not arg: |
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461 | cluster = lookup_cluster() |
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462 | if not cluster: |
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463 | print("Could not find Main Cluster") |
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464 | return |
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465 | |
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466 | # only tasks and main |
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467 | self.print_threads_by_cluster(cluster, False) |
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468 | |
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469 | elif arg == 'all': |
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470 | # all threads, all clusters |
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471 | self.print_all_threads() |
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472 | |
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473 | else: |
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474 | cluster = lookup_cluster(arg) |
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475 | if not cluster: |
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476 | print("No matching cluster") |
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477 | return |
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478 | |
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479 | # all tasks, specified cluster |
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480 | self.print_threads_by_cluster(cluster, True) |
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481 | |
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482 | |
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483 | ############ |
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484 | class Thread(gdb.Command): |
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485 | """Cforall: Switch to specified user threads |
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486 | Usage: |
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487 | cfathread <id> : switch stack to thread id on main cluster |
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488 | cfathread 0x<address> : switch stack to thread on any cluster |
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489 | cfathread <id> <clusterName> : switch stack to thread on specified cluster |
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490 | """ |
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491 | def __init__(self): |
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492 | # The first parameter of the line below is the name of the command. You |
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493 | # can call it 'uc++ task' |
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494 | super(Thread, self).__init__('cfathread', gdb.COMMAND_USER) |
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495 | |
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496 | ############################ AUXILIARY FUNCTIONS ######################### |
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497 | |
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498 | def switchto(self, thread): |
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499 | """Change to a new task by switching to a different stack and manually |
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500 | adjusting sp, fp and pc |
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501 | @task_address: str |
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502 | 2 supported format: |
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503 | in hex format |
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504 | <hex_address>: literal hexadecimal address |
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505 | Ex: 0xffffff |
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506 | in name of the pointer to the task |
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507 | "task_name": pointer of the variable name of the cluster |
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508 | Ex: T* s -> task_name = s |
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509 | Return: gdb.value of the cluster's address |
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510 | """ |
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511 | try: |
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512 | if not gdb.lookup_symbol('__cfactx_switch'): |
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513 | print('__cfactx_switch symbol is unavailable') |
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514 | return |
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515 | except: |
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516 | print('here 3') |
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517 | |
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518 | cfa_t = get_cfa_types() |
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519 | |
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520 | state = thread['state'].cast(cfa_t.thread_state) |
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521 | try: |
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522 | if state == gdb.parse_and_eval('Halted'): |
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523 | print('Cannot switch to a terminated thread') |
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524 | return |
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525 | |
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526 | if state == gdb.parse_and_eval('Start'): |
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527 | print('Cannjot switch to a thread not yet run') |
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528 | return |
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529 | except: |
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530 | print("here 2") |
---|
531 | return |
---|
532 | |
---|
533 | |
---|
534 | context = thread['context'] |
---|
535 | |
---|
536 | |
---|
537 | |
---|
538 | # must be at frame 0 to set pc register |
---|
539 | gdb.execute('select-frame 0') |
---|
540 | if gdb.selected_frame().architecture().name() != 'i386:x86-64': |
---|
541 | print('gdb debugging only supported for i386:x86-64 for now') |
---|
542 | return |
---|
543 | |
---|
544 | # gdb seems to handle things much better if we pretend we just entered the context switch |
---|
545 | # pretend the pc is __cfactx_switch and adjust the sp, base pointer doesn't need to change |
---|
546 | # lookup for sp,fp and uSwitch |
---|
547 | xsp = context['SP'] + 40 # 40 = 5 64bit registers : %r15, %r14, %r13, %r12, %rbx WARNING: x64 specific |
---|
548 | xfp = context['FP'] |
---|
549 | |
---|
550 | # convert string so we can strip out the address |
---|
551 | try: |
---|
552 | xpc = get_addr(gdb.parse_and_eval('__cfactx_switch').address) |
---|
553 | except: |
---|
554 | print("here") |
---|
555 | return |
---|
556 | |
---|
557 | # push sp, fp, pc into a global stack |
---|
558 | global STACK |
---|
559 | sp = gdb.parse_and_eval('$sp') |
---|
560 | fp = gdb.parse_and_eval('$fp') |
---|
561 | pc = gdb.parse_and_eval('$pc') |
---|
562 | stack_info = StackInfo(sp = sp, fp = fp, pc = pc) |
---|
563 | STACK.append(stack_info) |
---|
564 | |
---|
565 | # update registers for new task |
---|
566 | # print('switching to {} ({}) : [{}, {}, {}]'.format(thread['self_cor']['name'].string(), str(thread), str(xsp), str(xfp), str(xpc))) |
---|
567 | print('switching to thread {} ({})'.format(str(thread), thread['self_cor']['name'].string())) |
---|
568 | gdb.execute('set $rsp={}'.format(xsp)) |
---|
569 | gdb.execute('set $rbp={}'.format(xfp)) |
---|
570 | gdb.execute('set $pc={}'.format(xpc)) |
---|
571 | |
---|
572 | def find_matching_gdb_thread_id(): |
---|
573 | """ |
---|
574 | Parse the str from info thread to get the number |
---|
575 | """ |
---|
576 | info_thread_str = gdb.execute('info thread', to_string=True).splitlines() |
---|
577 | for thread_str in info_thread_str: |
---|
578 | if thread_str.find('this={}'.format(task)) != -1: |
---|
579 | thread_id_pattern = r'^\*?\s+(\d+)\s+Thread' |
---|
580 | # retrive gdb thread id |
---|
581 | return re.match(thread_id_pattern, thread_str).group(1) |
---|
582 | |
---|
583 | # check if the task is running or not |
---|
584 | if task_state == gdb.parse_and_eval('uBaseTask::Running'): |
---|
585 | # find the equivalent thread from info thread |
---|
586 | gdb_thread_id = find_matching_gdb_thread_id() |
---|
587 | if gdb_thread_id is None: |
---|
588 | print('cannot find the thread id to switch to') |
---|
589 | return |
---|
590 | # switch to that thread based using thread command |
---|
591 | gdb.execute('thread {}'.format(gdb_thread_id)) |
---|
592 | |
---|
593 | def switchto_id(self, tid, cluster): |
---|
594 | """ |
---|
595 | @cluster: cluster object |
---|
596 | @tid: int |
---|
597 | """ |
---|
598 | threads = lookup_threads_by_cluster( cluster ) |
---|
599 | |
---|
600 | for t in threads: |
---|
601 | if t.tid == tid: |
---|
602 | self.switchto(t.value) |
---|
603 | return |
---|
604 | |
---|
605 | print("Cound not find thread by id '{}'".format(tid)) |
---|
606 | |
---|
607 | def invoke(self, arg, from_tty): |
---|
608 | """ |
---|
609 | @arg: str |
---|
610 | @from_tty: bool |
---|
611 | """ |
---|
612 | if not is_cforall(): |
---|
613 | return |
---|
614 | |
---|
615 | argv = parse(arg) |
---|
616 | if argv[0].isdigit(): |
---|
617 | cname = " ".join(argv[1:]) if len(argv) > 1 else None |
---|
618 | cluster = lookup_cluster(cname) |
---|
619 | if not cluster: |
---|
620 | print("Could not find cluster '{}'".format(cname if cname else "Main Cluster")) |
---|
621 | return |
---|
622 | |
---|
623 | try: |
---|
624 | tid = int(argv[0]) |
---|
625 | except: |
---|
626 | print("'{}' not a valid thread id".format(argv[0])) |
---|
627 | print_usage(self) |
---|
628 | return |
---|
629 | |
---|
630 | # by id, userCluster |
---|
631 | self.switchto_id(tid, cluster) |
---|
632 | |
---|
633 | elif argv[0].startswith('0x') or argv[0].startswith('0X'): |
---|
634 | self.switchto(argv[0]) # by address, any cluster |
---|
635 | |
---|
636 | ############ |
---|
637 | class PrevThread(gdb.Command): |
---|
638 | """Switch back to previous task on the stack""" |
---|
639 | usage_msg = 'prevtask' |
---|
640 | |
---|
641 | def __init__(self): |
---|
642 | super(PrevThread, self).__init__('prevtask', gdb.COMMAND_USER) |
---|
643 | |
---|
644 | def invoke(self, arg, from_tty): |
---|
645 | """ |
---|
646 | @arg: str |
---|
647 | @from_tty: bool |
---|
648 | """ |
---|
649 | global STACK |
---|
650 | if len(STACK) != 0: |
---|
651 | # must be at frame 0 to set pc register |
---|
652 | gdb.execute('select-frame 0') |
---|
653 | |
---|
654 | # pop stack |
---|
655 | stack_info = STACK.pop() |
---|
656 | pc = get_addr(stack_info.pc) |
---|
657 | sp = stack_info.sp |
---|
658 | fp = stack_info.fp |
---|
659 | |
---|
660 | # pop sp, fp, pc from global stack |
---|
661 | adjust_stack(pc, fp, sp) |
---|
662 | |
---|
663 | # must be at C++ frame to access C++ vars |
---|
664 | gdb.execute('frame 1') |
---|
665 | else: |
---|
666 | print('empty stack') |
---|
667 | |
---|
668 | class ResetOriginFrame(gdb.Command): |
---|
669 | """Reset to the origin frame prior to continue execution again""" |
---|
670 | usage_msg = 'resetOriginFrame' |
---|
671 | def __init__(self): |
---|
672 | super(ResetOriginFrame, self).__init__('reset', gdb.COMMAND_USER) |
---|
673 | |
---|
674 | def invoke(self, arg, from_tty): |
---|
675 | """ |
---|
676 | @arg: str |
---|
677 | @from_tty: bool |
---|
678 | """ |
---|
679 | global STACK |
---|
680 | if len(STACK) != 0: |
---|
681 | stack_info = STACK.pop(0) |
---|
682 | STACK.clear() |
---|
683 | pc = get_addr(stack_info.pc) |
---|
684 | sp = stack_info.sp |
---|
685 | fp = stack_info.fp |
---|
686 | |
---|
687 | # pop sp, fp, pc from global stack |
---|
688 | adjust_stack(pc, fp, sp) |
---|
689 | |
---|
690 | # must be at C++ frame to access C++ vars |
---|
691 | gdb.execute('frame 1') |
---|
692 | #else: |
---|
693 | #print('reset: empty stack') #probably does not have to print msg |
---|
694 | |
---|
695 | Clusters() |
---|
696 | Processors() |
---|
697 | ResetOriginFrame() |
---|
698 | PrevThread() |
---|
699 | Threads() |
---|
700 | Thread() |
---|
701 | |
---|
702 | # Local Variables: # |
---|
703 | # mode: Python # |
---|
704 | # End: # |
---|