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# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2023 MediaTek Inc.
#
# Authors:
# Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
#
import gdb
from linux import utils, constants
if constants.LX_CONFIG_STACKDEPOT:
stack_record_type = utils.CachedType('struct stack_record')
DEPOT_STACK_ALIGN = 4
def help():
t = """Usage: lx-stack_depot_lookup [Hex handle value]
Example:
lx-stack_depot_lookup 0x00c80300\n"""
gdb.write("Unrecognized command\n")
raise gdb.GdbError(t)
def stack_depot_fetch(handle):
global DEPOT_STACK_ALIGN
global stack_record_type
stack_depot_disabled = gdb.parse_and_eval('stack_depot_disabled')
if stack_depot_disabled:
raise gdb.GdbError("stack_depot_disabled\n")
handle_parts_t = gdb.lookup_type("union handle_parts")
parts = handle.cast(handle_parts_t)
offset = parts['offset'] << DEPOT_STACK_ALIGN
pools_num = gdb.parse_and_eval('pools_num')
if handle == 0:
raise gdb.GdbError("handle is 0\n")
pool_index = parts['pool_index_plus_1'] - 1
if pool_index >= pools_num:
gdb.write("pool index %d out of bounds (%d) for stack id 0x%08x\n" % (parts['pool_index'], pools_num, handle))
return gdb.Value(0), 0
stack_pools = gdb.parse_and_eval('stack_pools')
try:
pool = stack_pools[pool_index]
stack = (pool + gdb.Value(offset).cast(utils.get_size_t_type())).cast(stack_record_type.get_type().pointer())
size = int(stack['size'].cast(utils.get_ulong_type()))
return stack['entries'], size
except Exception as e:
gdb.write("%s\n" % e)
return gdb.Value(0), 0
def stack_depot_print(handle):
if not constants.LX_CONFIG_STACKDEPOT:
raise gdb.GdbError("CONFIG_STACKDEPOT is not enabled")
entries, nr_entries = stack_depot_fetch(handle)
if nr_entries > 0:
for i in range(0, nr_entries):
try:
gdb.execute("x /i 0x%x" % (int(entries[i])))
except Exception as e:
gdb.write("%s\n" % e)
class StackDepotLookup(gdb.Command):
"""Search backtrace by handle"""
def __init__(self):
if constants.LX_CONFIG_STACKDEPOT:
super(StackDepotLookup, self).__init__("lx-stack_depot_lookup", gdb.COMMAND_SUPPORT)
def invoke(self, args, from_tty):
if not constants.LX_CONFIG_STACKDEPOT:
raise gdb.GdbError('CONFIG_STACKDEPOT is not set')
argv = gdb.string_to_argv(args)
if len(argv) == 1:
handle = int(argv[0], 16)
stack_depot_print(gdb.Value(handle).cast(utils.get_uint_type()))
else:
help()
StackDepotLookup()
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