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Merge tag 'input-for-v6.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor...
[linux.git] / scripts / gdb / linux / stackdepot.py
1 # SPDX-License-Identifier: GPL-2.0
2 #
3 # Copyright (c) 2023 MediaTek Inc.
4 #
5 # Authors:
6 #  Kuan-Ying Lee <[email protected]>
7 #
8
9 import gdb
10 from linux import utils, constants
11
12 if constants.LX_CONFIG_STACKDEPOT:
13     stack_record_type = utils.CachedType('struct stack_record')
14     DEPOT_STACK_ALIGN = 4
15
16 def stack_depot_fetch(handle):
17     global DEPOT_STACK_ALIGN
18     global stack_record_type
19
20     stack_depot_disabled = gdb.parse_and_eval('stack_depot_disabled')
21
22     if stack_depot_disabled:
23         raise gdb.GdbError("stack_depot_disabled\n")
24
25     handle_parts_t = gdb.lookup_type("union handle_parts")
26     parts = handle.cast(handle_parts_t)
27     offset = parts['offset'] << DEPOT_STACK_ALIGN
28     pool_index_cached = gdb.parse_and_eval('pool_index')
29
30     if parts['pool_index'] > pool_index_cached:
31         gdb.write("pool index %d out of bounds (%d) for stack id 0x%08x\n" % (parts['pool_index'], pool_index_cached, handle))
32         return gdb.Value(0), 0
33
34     stack_pools = gdb.parse_and_eval('stack_pools')
35
36     try:
37         pool = stack_pools[parts['pool_index']]
38         stack = (pool + gdb.Value(offset).cast(utils.get_size_t_type())).cast(stack_record_type.get_type().pointer())
39         size = int(stack['size'].cast(utils.get_ulong_type()))
40         return stack['entries'], size
41     except Exception as e:
42         gdb.write("%s\n" % e)
43         return gdb.Value(0), 0
44
45 def stack_depot_print(handle):
46     if not constants.LX_CONFIG_STACKDEPOT:
47         raise gdb.GdbError("CONFIG_STACKDEPOT is not enabled")
48
49     entries, nr_entries = stack_depot_fetch(handle)
50     if nr_entries > 0:
51         for i in range(0, nr_entries):
52             try:
53                 gdb.execute("x /i 0x%x" % (int(entries[i])))
54             except Exception as e:
55                 gdb.write("%s\n" % e)
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