| 1 | """
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| 2 | To run this extension, the python name has to be as same as one of the loaded library
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| 3 | Additionally, the file must exist in a folder which is in gdb's safe path
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| 4 | """
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| 5 | import collections
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| 6 | import gdb
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| 7 |
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| 8 | # set these signal handlers with some settings (nostop, noprint, pass)
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| 9 | gdb.execute('handle SIGALRM nostop noprint pass')
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| 10 | gdb.execute('handle SIGUSR1 nostop noprint pass')
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| 11 |
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| 12 | # GDB types for various structures/types in uC++
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| 13 | uCluster_ptr_type = gdb.lookup_type('uCluster').pointer()
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| 14 | uClusterDL_ptr_type = gdb.lookup_type('uClusterDL').pointer()
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| 15 | uBaseTask_ptr_type = gdb.lookup_type('uBaseTask').pointer()
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| 16 | uBaseTaskDL_ptr_type = gdb.lookup_type('uBaseTaskDL').pointer()
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| 17 | int_ptr_type = gdb.lookup_type('int').pointer()
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| 18 |
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| 19 | # A named tuple representing information about a stack
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| 20 | StackInfo = collections.namedtuple('StackInfo', 'sp fp pc')
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| 21 |
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| 22 | # A global variable to keep track of stack information as one context switches
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| 23 | # from one task to another task
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| 24 | STACK = []
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| 25 |
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| 26 | # A global variable to keep all system task name
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| 27 | SysTask_Name = ["uLocalDebuggerReader", "uLocalDebugger", "uProcessorTask", "uBootTask", "uSystemTask",
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| 28 | "uProcessorTask", "uPthread", "uProfiler"]
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| 29 |
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| 30 | def get_addr(addr):
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| 31 | """
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| 32 | NOTE: sketchy solution to retrieve address. There is a better solution...
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| 33 | @addr: str of an address that can be in a format 0xfffff <type of the object
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| 34 | at this address>
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| 35 | Return: str of just the address
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| 36 | """
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| 37 | str_addr = str(addr)
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| 38 | ending_addr_index = str_addr.find('<')
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| 39 | if ending_addr_index == -1:
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| 40 | return str(addr)
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| 41 | return str_addr[:ending_addr_index].strip()
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| 42 |
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| 43 | def print_usage(msg):
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| 44 | """
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| 45 | Print out usage message
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| 46 | @msg: str
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| 47 | """
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| 48 | print('Usage: ' + msg)
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| 49 |
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| 50 | def get_argv_list(args):
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| 51 | """
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| 52 | Split the argument list in string format, where each argument is separated
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| 53 | by whitespace delimiter, to a list of arguments like argv
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| 54 | @args: str of arguments
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| 55 | Return:
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| 56 | [] if args is an empty string
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| 57 | list if args is not empty
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| 58 | """
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| 59 | # parse the string format of arguments and return a list of arguments
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| 60 | argv = args.split(' ')
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| 61 | if len(argv) == 1 and argv[0] == '':
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| 62 | return []
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| 63 | return argv
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| 64 |
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| 65 | def get_cluster_root():
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| 66 | """
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| 67 | Return: gdb.Value of globalClusters.root (is an address)
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| 68 | """
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| 69 | cluster_root = gdb.parse_and_eval('uKernelModule::globalClusters.root')
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| 70 | if cluster_root.address == 0x0:
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| 71 | print('No clusters, program terminated')
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| 72 | return cluster_root
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| 73 |
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| 74 | def lookup_cluster_by_name(cluster_name):
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| 75 | """
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| 76 | Look up a cluster given its ID
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| 77 | @cluster_name: str
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| 78 | Return: gdb.Value
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| 79 | """
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| 80 | cluster_root = get_cluster_root()
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| 81 | if cluster_root.address == 0x0:
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| 82 | return cluster_root.address
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| 83 |
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| 84 | # lookup for the task associated with the id
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| 85 | cluster = 0x0
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| 86 | curr = cluster_root
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| 87 | while True:
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| 88 | if curr['cluster_']['name'].string() == cluster_name:
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| 89 | cluster = curr['cluster_'].address
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| 90 | break
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| 91 | curr = curr['next'].cast(uClusterDL_ptr_type)
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| 92 | if curr == cluster_root:
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| 93 | break
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| 94 |
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| 95 | if cluster == 0x0:
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| 96 | print("Cannot find a cluster with the name: {}.".format(cluster_name))
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| 97 | return cluster
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| 98 |
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| 99 | ############################ COMMAND IMPLEMENTATION #########################
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| 100 |
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| 101 | class Clusters(gdb.Command):
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| 102 | """Print out the list of available clusters"""
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| 103 | usage_msg = 'cluster'
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| 104 | def __init__(self):
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| 105 | super(Clusters, self).__init__('clusters', gdb.COMMAND_USER)
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| 106 |
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| 107 | def invoke(self, arg, from_tty):
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| 108 | """
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| 109 | Iterate through a circular linked list of clusters and print out its
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| 110 | name along with address associated to each cluster
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| 111 | @arg: str
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| 112 | @from_tty: bool
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| 113 | """
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| 114 | argv = get_argv_list(arg)
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| 115 | if len(argv) != 0:
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| 116 | print_usage(self.usage_msg)
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| 117 | return
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| 118 |
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| 119 | cluster_root = get_cluster_root()
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| 120 | if cluster_root.address == 0x0:
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| 121 | return
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| 122 | curr = cluster_root
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| 123 | print('{:>20}{:>18}'.format('Name', 'Address'))
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| 124 |
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| 125 | while True:
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| 126 | print('{:>20}{:>18}'.format(curr['cluster_']['name'].string(),
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| 127 | str(curr['cluster_'].reference_value())[1:]))
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| 128 | curr = curr['next'].cast(uClusterDL_ptr_type)
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| 129 | if curr == cluster_root:
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| 130 | break
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| 131 |
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| 132 | class ClusterProcessors(gdb.Command):
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| 133 | """Display a list of all info about all available processors on a particular cluster"""
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| 134 | usage_msg = 'processors <cluster_name>'
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| 135 | def __init__(self):
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| 136 | super(ClusterProcessors, self).__init__('processors', gdb.COMMAND_USER)
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| 137 |
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| 138 | def invoke(self, arg, from_tty):
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| 139 | """
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| 140 | Iterate through a circular linked list of tasks and print out all
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| 141 | info about each processor in that cluster
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| 142 | @arg: str
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| 143 | @from_tty: bool
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| 144 | """
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| 145 | argv = get_argv_list(arg)
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| 146 | if len(argv) > 1:
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| 147 | print_usage(self.usage_msg)
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| 148 | return
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| 149 |
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| 150 | if len(argv) == 0:
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| 151 | cluster_address = lookup_cluster_by_name("userCluster")
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| 152 | else:
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| 153 | cluster_address = lookup_cluster_by_name(argv[0])
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| 154 |
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| 155 | if cluster_address == 0x0:
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| 156 | return
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| 157 |
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| 158 | processor_root = cluster_address.cast(uCluster_ptr_type)['processorsOnCluster']['root']
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| 159 | if processor_root.address == 0x0:
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| 160 | print('There are no processors for cluster at address: {}'.format(cluster_address))
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| 161 | return
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| 162 |
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| 163 | uProcessorDL_ptr_type = gdb.lookup_type('uProcessorDL').pointer()
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| 164 | print('{:>18}{:>20}{:>20}{:>20}'.format('Address', 'PID', 'Preemption', 'Spin'))
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| 165 | curr = processor_root
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| 166 |
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| 167 | while True:
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| 168 | processor = curr['processor_']
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| 169 | print('{:>18}{:>20}{:>20}{:>20}'.format(get_addr(processor.address),
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| 170 | str(processor['pid']), str(processor['preemption']),
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| 171 | str(processor['spin'])))
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| 172 |
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| 173 | curr = curr['next'].cast(uProcessorDL_ptr_type)
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| 174 | if curr == processor_root:
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| 175 | break
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| 176 |
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| 177 | class Task(gdb.Command):
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| 178 | usage_msg = """
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| 179 | task : print userCluster tasks, application tasks only
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| 180 | task <clusterName> : print cluster tasks, application tasks only
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| 181 | task all : print all clusters, all tasks
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| 182 | task <id> : context switch to task id on userCluster
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| 183 | task 0x<address> : context switch to task on any cluster
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| 184 | task <id> <clusterName> : context switch to task on specified cluster
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| 185 | """
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| 186 | def __init__(self):
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| 187 | # The first parameter of the line below is the name of the command. You
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| 188 | # can call it 'uc++ task'
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| 189 | super(Task, self).__init__('task', gdb.COMMAND_USER)
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| 190 |
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| 191 | ############################ AUXILIARY FUNCTIONS #########################
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| 192 |
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| 193 | def print_tasks_by_cluster_all(self, cluster_address):
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| 194 | """
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| 195 | Display a list of all info about all available tasks on a particular cluster
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| 196 | @cluster_address: gdb.Value
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| 197 | """
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| 198 | cluster_address = cluster_address.cast(uCluster_ptr_type)
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| 199 | task_root = cluster_address['tasksOnCluster']['root']
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| 200 |
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| 201 | if task_root.address == 0x0:
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| 202 | print('There are no tasks for cluster at address: {}'.format(cluster_address))
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| 203 | return
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| 204 |
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| 205 | print('{:>4}{:>20}{:>18}{:>25}'.format('ID', 'Task Name', 'Address', 'State'))
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| 206 | curr = task_root
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| 207 | task_id = 0
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| 208 | systask_id = -1
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| 209 |
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| 210 | btstr = gdb.execute('bt', to_string = True)
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| 211 | break_addr = btstr.splitlines()[0].split('this=',1)[1].split(',')[0].split(')')[0]
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| 212 |
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| 213 | while True:
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| 214 | global SysTask_Name
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| 215 | if (curr['task_']['name'].string() in SysTask_Name):
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| 216 | if str(curr['task_'].reference_value())[1:] == break_addr:
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| 217 | print(
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| 218 | ('{:>4}{:>20}{:>18}{:>25}'.format('* '+str(systask_id), curr['task_']['name'].string(),
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| 219 | str(curr['task_'].reference_value())[1:],
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| 220 | str(curr['task_']['state']))
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| 221 | )
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| 222 | )
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| 223 | else:
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| 224 | print(
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| 225 | ('{:>4}{:>20}{:>18}{:>25}'.format(systask_id, curr['task_']['name'].string(),
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| 226 | str(curr['task_'].reference_value())[1:],
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| 227 | str(curr['task_']['state']))
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| 228 | )
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| 229 | )
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| 230 | systask_id -= 1
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| 231 | else:
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| 232 | if str(curr['task_'].reference_value())[1:] == break_addr:
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| 233 | print('{:>4}{:>20}{:>18}{:>25}'.format('* '+str(task_id), curr['task_']['name'].string(),
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| 234 | str(curr['task_'].reference_value())[1:],
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| 235 | str(curr['task_']['state']))
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| 236 | )
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| 237 | else:
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| 238 | print('{:>4}{:>20}{:>18}{:>25}'.format(task_id, curr['task_']['name'].string(),
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| 239 | str(curr['task_'].reference_value())[1:],
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| 240 | str(curr['task_']['state']))
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| 241 | )
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| 242 | task_id += 1
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| 243 |
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| 244 | curr = curr['next'].cast(uBaseTaskDL_ptr_type)
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| 245 | if curr == task_root:
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| 246 | break
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| 247 |
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| 248 | def print_tasks_by_cluster_address_all(self, cluster_address):
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| 249 | """
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| 250 | Display a list of all info about all available tasks on a particular cluster
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| 251 | @cluster_address: str
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| 252 | """
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| 253 | # Iterate through a circular linked list of tasks and print out its
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| 254 | # name along with address associated to each cluster
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| 255 |
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| 256 | # convert hex string to hex number
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| 257 | try:
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| 258 | hex_addr = int(cluster_address, 16)
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| 259 | except:
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| 260 | print_usage(self.usage_msg)
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| 261 | return
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| 262 |
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| 263 | cluster_address = gdb.Value(hex_addr)
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| 264 | self.print_tasks_by_cluster_all(cluster_address)
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| 265 |
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| 266 | def print_tasks_by_cluster_address(self, cluster_address):
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| 267 | """
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| 268 | Display a list of limited info about all available tasks on a particular cluster
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| 269 | @cluster_address: str
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| 270 | """
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| 271 | # Iterate through a circular linked list of tasks and print out its
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| 272 | # name along with address associated to each cluster
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| 273 |
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| 274 | # convert hex string to hex number
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| 275 | try:
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| 276 | hex_addr = int(cluster_address, 16)
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| 277 | except:
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| 278 | print_usage(self.usage_msg)
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| 279 | return
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| 280 |
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| 281 | cluster_address = gdb.Value(hex_addr).cast(uCluster_ptr_type)
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| 282 | task_root = cluster_address['tasksOnCluster']['root']
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| 283 |
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| 284 | if task_root.address == 0x0:
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| 285 | print('There are no tasks for cluster at address: {}'.format(cluster_address))
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| 286 | return
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| 287 |
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| 288 | print('{:>4}{:>20}{:>18}{:>25}'.format('ID', 'Task Name', 'Address', 'State'))
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| 289 | curr = task_root
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| 290 | task_id = 0
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| 291 | btstr = gdb.execute('bt', to_string = True)
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| 292 | break_addr = btstr.splitlines()[0].split('this=',1)[1].split(',')[0].split(')')[0]
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| 293 |
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| 294 | while True:
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| 295 | global SysTask_Name
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| 296 | if (curr['task_']['name'].string() not in SysTask_Name):
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| 297 | if str(curr['task_'].reference_value())[1:] == break_addr:
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| 298 | print(
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| 299 | ('{:>4}{:>20}{:>18}{:>25}'.format('* '+str(task_id), curr['task_']['name'].string(),
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| 300 | str(curr['task_'].reference_value())[1:],
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| 301 | str(curr['task_']['state']))
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| 302 | )
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| 303 | )
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| 304 | else:
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| 305 | print('{:>4}{:>20}{:>18}{:>25}'.format(task_id, curr['task_']['name'].string(),
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| 306 | str(curr['task_'].reference_value())[1:],
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| 307 | str(curr['task_']['state']))
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| 308 | )
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| 309 |
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| 310 | curr = curr['next'].cast(uBaseTaskDL_ptr_type)
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| 311 | task_id += 1
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| 312 | if curr == task_root:
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| 313 | break
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| 314 | else:
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| 315 | curr = curr['next'].cast(uBaseTaskDL_ptr_type)
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| 316 | if curr == task_root:
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| 317 | break
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| 318 |
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| 319 | ############################ COMMAND FUNCTIONS #########################
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| 320 |
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| 321 | def print_user_tasks(self):
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| 322 | """Iterate only userCluster, print only tasks and main"""
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| 323 |
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| 324 | cluster_address = lookup_cluster_by_name("userCluster")
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| 325 | if cluster_address == 0x0:
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| 326 | return
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| 327 |
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| 328 | self.print_tasks_by_cluster_address(str(cluster_address))
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| 329 |
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| 330 |
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| 331 | def print_all_tasks(self):
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| 332 | """Iterate through each cluster, iterate through all tasks and print out info about all the tasks
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| 333 | in those clusters"""
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| 334 | cluster_root = get_cluster_root()
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| 335 | if cluster_root.address == 0x0:
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| 336 | return
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| 337 |
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| 338 | curr = cluster_root
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| 339 | print('{:>20}{:>18}'.format('Cluster Name', 'Address'))
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| 340 |
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| 341 | while True:
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| 342 | addr = str(curr['cluster_'].reference_value())[1:]
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| 343 | print('{:>20}{:>18}'.format(curr['cluster_']['name'].string(), addr))
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| 344 |
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| 345 | self.print_tasks_by_cluster_address_all(addr)
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| 346 | curr = curr['next'].cast(uClusterDL_ptr_type)
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| 347 | if curr == cluster_root:
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| 348 | break
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| 349 |
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| 350 | def pushtask_by_address(self, task_address):
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| 351 | """Change to a new task by switching to a different stack and manually
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| 352 | adjusting sp, fp and pc
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| 353 | @task_address: str
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| 354 | 2 supported format:
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| 355 | in hex format
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| 356 | <hex_address>: literal hexadecimal address
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| 357 | Ex: 0xffffff
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| 358 | in name of the pointer to the task
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| 359 | "task_name": pointer of the variable name of the cluster
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| 360 | Ex: T* s -> task_name = s
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| 361 | Return: gdb.value of the cluster's address
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| 362 | """
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| 363 | # Task address has a format "task_address", which implies that it is the
|
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| 364 | # name of the variable, and it needs to be evaluated
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| 365 | if task_address.startswith('"') and task_address.endswith('"'):
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| 366 | task = gdb.parse_and_eval(task_address.replace('"', ''))
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| 367 | else:
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| 368 | # Task address format does not include the quotation marks, which implies
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| 369 | # that it is a hex address
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| 370 | # convert hex string to hex number
|
|---|
| 371 | try:
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| 372 | hex_addr = int(task_address, 16)
|
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| 373 | except:
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| 374 | print_usage(self.usage_msg)
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| 375 | return
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| 376 | task_address = gdb.Value(hex_addr)
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| 377 | task = task_address.cast(uBaseTask_ptr_type)
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| 378 |
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| 379 | uContext_t_ptr_type = gdb.lookup_type('UPP::uMachContext::uContext_t').pointer()
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| 380 |
|
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| 381 | task_state = task['state']
|
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| 382 | if task_state == gdb.parse_and_eval('uBaseTask::Terminate'):
|
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| 383 | print('Cannot switch to a terminated thread')
|
|---|
| 384 | return
|
|---|
| 385 | task_context = task['context'].cast(uContext_t_ptr_type)
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| 386 |
|
|---|
| 387 | # lookup for sp,fp and uSwitch
|
|---|
| 388 | xsp = task_context['SP'] + 48
|
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| 389 | xfp = task_context['FP']
|
|---|
| 390 | if not gdb.lookup_symbol('uSwitch'):
|
|---|
| 391 | print('uSwitch symbol is unavailable')
|
|---|
| 392 | return
|
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| 393 |
|
|---|
| 394 | # convert string so we can strip out the address
|
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| 395 | xpc = get_addr(gdb.parse_and_eval('uSwitch').address + 28)
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| 396 | # must be at frame 0 to set pc register
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| 397 | gdb.execute('select-frame 0')
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| 398 |
|
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| 399 | # push sp, fp, pc into a global stack
|
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| 400 | global STACK
|
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| 401 | sp = gdb.parse_and_eval('$sp')
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| 402 | fp = gdb.parse_and_eval('$fp')
|
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| 403 | pc = gdb.parse_and_eval('$pc')
|
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| 404 | stack_info = StackInfo(sp = sp, fp = fp, pc = pc)
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| 405 | STACK.append(stack_info)
|
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| 406 |
|
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| 407 | # update registers for new task
|
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| 408 | gdb.execute('set $rsp={}'.format(xsp))
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| 409 | gdb.execute('set $rbp={}'.format(xfp))
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| 410 | gdb.execute('set $pc={}'.format(xpc))
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| 411 |
|
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| 412 | def pushtask_by_id(self, task_id, cluster_name):
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| 413 | """
|
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| 414 | @cluster_name: str
|
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| 415 | @task_id: str
|
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| 416 | """
|
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| 417 | try:
|
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| 418 | task_id = int(task_id)
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| 419 | except:
|
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| 420 | print_usage(self.usage_msg)
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| 421 | return
|
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| 422 |
|
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| 423 | # retrieve the address associated with the cluster name
|
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| 424 | cluster_address = lookup_cluster_by_name(cluster_name)
|
|---|
| 425 | if cluster_address == 0x0:
|
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| 426 | return
|
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| 427 |
|
|---|
| 428 | task_root = cluster_address.cast(uCluster_ptr_type)['tasksOnCluster']['root']
|
|---|
| 429 | if task_root.address == 0x0:
|
|---|
| 430 | print('There are no tasks on this cluster')
|
|---|
| 431 | return
|
|---|
| 432 |
|
|---|
| 433 | user_id = 0
|
|---|
| 434 | task_addr = None
|
|---|
| 435 | systask_id = -1 # system search id starts with negative
|
|---|
| 436 |
|
|---|
| 437 | # lookup for the task associated with the id
|
|---|
| 438 | global SysTask_Name
|
|---|
| 439 | if (task_id >= 0 and cluster_name == "systemCluster"):
|
|---|
| 440 | print('internal error: systemCluster does not have ID >= 0')
|
|---|
| 441 | return
|
|---|
| 442 | #id is a system task
|
|---|
| 443 | elif task_id < 0:
|
|---|
| 444 | curr = task_root
|
|---|
| 445 | rootflag = False
|
|---|
| 446 | while (curr['task_']['name'].string() not in SysTask_Name):
|
|---|
| 447 | curr = curr['next'].cast(uBaseTaskDL_ptr_type)
|
|---|
| 448 | if curr == task_root:
|
|---|
| 449 | rootflag = True
|
|---|
| 450 | break
|
|---|
| 451 | if rootflag == False:
|
|---|
| 452 | if task_id == systask_id:
|
|---|
| 453 | task_addr = str(curr['task_'].address)
|
|---|
| 454 | else:
|
|---|
| 455 | while True:
|
|---|
| 456 | curr = curr['next'].cast(uBaseTaskDL_ptr_type)
|
|---|
| 457 |
|
|---|
| 458 | if (curr['task_']['name'].string() in SysTask_Name):
|
|---|
| 459 | systask_id -= 1
|
|---|
| 460 | if curr == task_root:
|
|---|
| 461 | break
|
|---|
| 462 | if task_id == systask_id:
|
|---|
| 463 | task_addr = str(curr['task_'].address)
|
|---|
| 464 | break
|
|---|
| 465 |
|
|---|
| 466 | if curr == task_root:
|
|---|
| 467 | break
|
|---|
| 468 | #id is a user task
|
|---|
| 469 | else:
|
|---|
| 470 | curr = task_root
|
|---|
| 471 | rootflag = False
|
|---|
| 472 | while (curr['task_']['name'].string() in SysTask_Name):
|
|---|
| 473 | curr = curr['next'].cast(uBaseTaskDL_ptr_type)
|
|---|
| 474 | if curr == task_root:
|
|---|
| 475 | rootflag = True
|
|---|
| 476 | break
|
|---|
| 477 | if rootflag == False:
|
|---|
| 478 | if task_id == user_id:
|
|---|
| 479 | task_addr = str(curr['task_'].address)
|
|---|
| 480 | else:
|
|---|
| 481 | while True:
|
|---|
| 482 | curr = curr['next'].cast(uBaseTaskDL_ptr_type)
|
|---|
| 483 |
|
|---|
| 484 | if (curr['task_']['name'].string() not in SysTask_Name):
|
|---|
| 485 | user_id += 1
|
|---|
| 486 | if curr == task_root:
|
|---|
| 487 | break
|
|---|
| 488 | if task_id == user_id:
|
|---|
| 489 | task_addr = str(curr['task_'].address)
|
|---|
| 490 | break
|
|---|
| 491 |
|
|---|
| 492 | if curr == task_root:
|
|---|
| 493 | break
|
|---|
| 494 |
|
|---|
| 495 | if not task_addr:
|
|---|
| 496 | print("Cannot find task ID: {}. Only have {} tasks".format(task_id,user_id))
|
|---|
| 497 | else:
|
|---|
| 498 | self.pushtask_by_address(task_addr)
|
|---|
| 499 |
|
|---|
| 500 | def print_tasks_by_cluster_name(self, cluster_name):
|
|---|
| 501 | """
|
|---|
| 502 | Print out all the tasks available in the specified cluster
|
|---|
| 503 | @cluster_name: str
|
|---|
| 504 | """
|
|---|
| 505 | cluster_address = lookup_cluster_by_name(cluster_name)
|
|---|
| 506 | if cluster_address == 0x0:
|
|---|
| 507 | return
|
|---|
| 508 |
|
|---|
| 509 | self.print_tasks_by_cluster_all(cluster_address)
|
|---|
| 510 |
|
|---|
| 511 | def invoke(self, arg, from_tty):
|
|---|
| 512 | """
|
|---|
| 513 | @arg: str
|
|---|
| 514 | @from_tty: bool
|
|---|
| 515 | """
|
|---|
| 516 | argv = get_argv_list(arg)
|
|---|
| 517 | if len(argv) == 0:
|
|---|
| 518 | # print tasks
|
|---|
| 519 | self.print_user_tasks() # only tasks and main
|
|---|
| 520 | elif len(argv) == 1:
|
|---|
| 521 | # push task
|
|---|
| 522 | if argv[0].isdigit():
|
|---|
| 523 | self.pushtask_by_id(argv[0], "userCluster") # by id, userCluster
|
|---|
| 524 | elif argv[0].startswith('0x') or argv[0].startswith('0X'):
|
|---|
| 525 | self.pushtask_by_address(argv[0]) # by address, any cluster
|
|---|
| 526 | # print tasks
|
|---|
| 527 | elif argv[0] == 'all':
|
|---|
| 528 | self.print_all_tasks() # all tasks, all clusters
|
|---|
| 529 | else:
|
|---|
| 530 | self.print_tasks_by_cluster_name(argv[0]) # all tasks, specified cluster
|
|---|
| 531 | elif len(argv) == 2:
|
|---|
| 532 | # push task
|
|---|
| 533 | self.pushtask_by_id(argv[0], argv[1]) # by id, specified cluster
|
|---|
| 534 | else:
|
|---|
| 535 | print('parse error')
|
|---|
| 536 | print_usage(self.usage_msg)
|
|---|
| 537 |
|
|---|
| 538 | class PrevTask(gdb.Command):
|
|---|
| 539 | """Switch back to previous task on the stack"""
|
|---|
| 540 | usage_msg = 'prevtask <task_address>'
|
|---|
| 541 |
|
|---|
| 542 | def __init__(self):
|
|---|
| 543 | super(PrevTask, self).__init__('prevtask', gdb.COMMAND_USER)
|
|---|
| 544 |
|
|---|
| 545 | def invoke(self, arg, from_tty):
|
|---|
| 546 | """
|
|---|
| 547 | @arg: str
|
|---|
| 548 | @from_tty: bool
|
|---|
| 549 | """
|
|---|
| 550 | global STACK
|
|---|
| 551 | if len(STACK) != 0:
|
|---|
| 552 | # must be at frame 0 to set pc register
|
|---|
| 553 | gdb.execute('select-frame 0')
|
|---|
| 554 |
|
|---|
| 555 | # pop stack
|
|---|
| 556 | stack_info = STACK.pop()
|
|---|
| 557 | pc = get_addr(stack_info.pc)
|
|---|
| 558 | sp = stack_info.sp
|
|---|
| 559 | fp = stack_info.fp
|
|---|
| 560 |
|
|---|
| 561 | # pop sp, fp, pc from global stack
|
|---|
| 562 | gdb.execute('set $pc = {}'.format(pc))
|
|---|
| 563 | gdb.execute('set $rbp = {}'.format(fp))
|
|---|
| 564 | gdb.execute('set $sp = {}'.format(sp))
|
|---|
| 565 |
|
|---|
| 566 | # must be at C++ frame to access C++ vars
|
|---|
| 567 | gdb.execute('frame 1')
|
|---|
| 568 | else:
|
|---|
| 569 | print('empty stack')
|
|---|
| 570 |
|
|---|
| 571 | class ResetOriginFrame(gdb.Command):
|
|---|
| 572 | """Reset to the origin frame prior to continue execution again"""
|
|---|
| 573 | usage_msg = 'resetOriginFrame'
|
|---|
| 574 | def __init__(self):
|
|---|
| 575 | super(ResetOriginFrame, self).__init__('reset', gdb.COMMAND_USER)
|
|---|
| 576 |
|
|---|
| 577 | def invoke(self, arg, from_tty):
|
|---|
| 578 | """
|
|---|
| 579 | @arg: str
|
|---|
| 580 | @from_tty: bool
|
|---|
| 581 | """
|
|---|
| 582 | global STACK
|
|---|
| 583 | if len(STACK) != 0:
|
|---|
| 584 | stack_info = STACK.pop(0)
|
|---|
| 585 | STACK.clear()
|
|---|
| 586 | pc = get_addr(stack_info.pc)
|
|---|
| 587 | sp = stack_info.sp
|
|---|
| 588 | fp = stack_info.fp
|
|---|
| 589 |
|
|---|
| 590 | # pop sp, fp, pc from global stack
|
|---|
| 591 | gdb.execute('set $pc = {}'.format(pc))
|
|---|
| 592 | gdb.execute('set $rbp = {}'.format(fp))
|
|---|
| 593 | gdb.execute('set $sp = {}'.format(sp))
|
|---|
| 594 |
|
|---|
| 595 | # must be at C++ frame to access C++ vars
|
|---|
| 596 | gdb.execute('frame 1')
|
|---|
| 597 | #else:
|
|---|
| 598 | #print('reset: empty stack') #probably does not have to print msg
|
|---|
| 599 |
|
|---|
| 600 | Clusters()
|
|---|
| 601 | ClusterProcessors()
|
|---|
| 602 | PrevTask()
|
|---|
| 603 | ResetOriginFrame()
|
|---|
| 604 | Task()
|
|---|
