92 lines
3.1 KiB
Python
92 lines
3.1 KiB
Python
from gdb.printing import PrettyPrinter, register_pretty_printer
|
|
import gdb
|
|
|
|
class KthreadPrettyPrinter(object):
|
|
|
|
def __init__(self, val):
|
|
self.val = val
|
|
|
|
def to_string(self):
|
|
result = ""
|
|
name = self.val["name"]
|
|
state = self.val["state"]
|
|
# Should get PC on stack for non-current thread otherwise will only get address in cpu_context_switch
|
|
cpuState = self.val["cpuState"]
|
|
cmdline = "info line *%s"%int(cpuState["eip"].cast(gdb.lookup_type("long").pointer()))
|
|
line = gdb.execute(cmdline, to_string=True)
|
|
#line = gdb.find_pc_line(int(cpuState["eip"].cast(gdb.lookup_type("long").pointer()).referenced_value()))
|
|
currentThread = gdb.parse_and_eval("currentThread")
|
|
if self.val == currentThread:
|
|
result += "->"
|
|
else:
|
|
result += " "
|
|
result += "Addr: 0x%x, name: %s, state: %s, PC: %s" % (self.val, name, state, line)
|
|
return result
|
|
|
|
|
|
class CustomPrettyPrinterLocator(PrettyPrinter):
|
|
"""Given a gdb.Value, search for a custom pretty printer"""
|
|
|
|
def __init__(self):
|
|
super(CustomPrettyPrinterLocator, self).__init__(
|
|
"matos_pretty_printers", []
|
|
)
|
|
|
|
def __call__(self, val):
|
|
"""Return the custom formatter if the type can be handled"""
|
|
|
|
typename = gdb.types.get_basic_type(val.type).tag
|
|
if typename is None:
|
|
typename = val.type.name
|
|
|
|
if typename == "kthread":
|
|
return KthreadPrettyPrinter(val)
|
|
|
|
|
|
class KthreadListDumpCmd(gdb.Command):
|
|
"""Prints the kthread list"""
|
|
|
|
def __init__(self):
|
|
super(KthreadListDumpCmd, self).__init__(
|
|
"kthread_list_dump", gdb.COMMAND_USER
|
|
)
|
|
|
|
def _kthread_list_to_str(self, val):
|
|
"""Walk through the Kthread list.
|
|
|
|
We will simply follow the 'next' pointers until we encounter the HEAD again
|
|
"""
|
|
idx = 0
|
|
head = val
|
|
kthread_ptr = val
|
|
result = ""
|
|
while kthread_ptr != 0 and (idx == 0 or kthread_ptr != head) :
|
|
result += "\n%d: %s" % (idx, KthreadPrettyPrinter(kthread_ptr).to_string())
|
|
kthread_ptr = kthread_ptr["next"]
|
|
idx += 1
|
|
result = ("Found a Linked List with %d kthread:" % idx) + result
|
|
return result
|
|
|
|
def complete(self, text, word):
|
|
# We expect the argument passed to be a symbol so fallback to the
|
|
# internal tab-completion handler for symbols
|
|
return gdb.COMPLETE_SYMBOL
|
|
|
|
def invoke(self, args, from_tty):
|
|
# We can pass args here and use Python CLI utilities like argparse
|
|
# to do argument parsing
|
|
print("Args Passed: %s" % args)
|
|
if args:
|
|
kthread_ptr_val = gdb.parse_and_eval(args)
|
|
else:
|
|
kthread_ptr_val = gdb.parse_and_eval("currentThread")
|
|
if str(kthread_ptr_val.type) != "struct kthread *":
|
|
print("Expected pointer argument of type (struct kthread *)")
|
|
return
|
|
|
|
print(self._kthread_list_to_str(kthread_ptr_val))
|
|
|
|
register_pretty_printer(None, CustomPrettyPrinterLocator(), replace=True)
|
|
KthreadListDumpCmd()
|
|
|