gdb/linux/cpus.py

4 #  per-cpu tools
6 # Copyright (c) Siemens AG, 2011-2013
27         return gdb.selected_thread().num - 1
30         if tid > (0x100000000 - MAX_CPUS - 2):
31             return 0x100000000 - tid - 2
33             return tasks.get_thread_info(tasks.get_task_by_pid(tid))['cpu']
35         raise gdb.GdbError("Sorry, obtaining the current CPU is not yet "
39 def per_cpu(var_ptr, cpu):  argument
40     if cpu == -1:
41         cpu = get_current_cpu()
43         offset = gdb.parse_and_eval(
44             "trap_block[{0}].__per_cpu_base".format(str(cpu)))
47             offset = gdb.parse_and_eval(
48                 "__per_cpu_offset[{0}]".format(str(cpu)))
51             offset = 0
52     pointer = var_ptr.cast(utils.get_long_type()) + offset
81     entry = -1
98         cpu = entry * bits_per_entry + bit
103         yield int(cpu)
107     for cpu in cpu_list("__cpu_online_mask"):
108         yield cpu
112     for cpu in cpu_list("__cpu_present_mask"):
113         yield cpu
117     for cpu in cpu_list("__cpu_possible_mask"):
118         yield cpu
122     for cpu in cpu_list("__cpu_active_mask"):
123         yield cpu
127     """List CPU status arrays
129 Displays the known state of each CPU based on the kernel masks
133         super(LxCpus, self).__init__("lx-cpus", gdb.COMMAND_DATA)
146     """Return per-cpu variable.
148 $lx_per_cpu("VAR"[, CPU]): Return the per-cpu variable called VAR for the
149 given CPU number. If CPU is omitted, the CPU of the current context is used.
155     def invoke(self, var_name, cpu=-1):  argument
157         return per_cpu(var_ptr, cpu)
162 def get_current_task(cpu):  argument
173             return per_cpu(var_ptr, cpu).dereference()
204 $lx_current([CPU]): Return the per-cpu task variable for the given CPU
205 number. If CPU is omitted, the CPU of the current context is used."""
210     def invoke(self, cpu=-1):  argument
211         return get_current_task(cpu)