Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1# SPDX-License-Identifier: GPL-2.0
2#
3# Copyright (c) 2023 MediaTek Inc.
4#
5# Authors:
6# Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
7#
8
9import gdb
10from linux import utils, constants
11
12if constants.LX_CONFIG_STACKDEPOT:
13 stack_record_type = utils.CachedType('struct stack_record')
14 DEPOT_STACK_ALIGN = 4
15
16def 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 pools_num = gdb.parse_and_eval('pools_num')
29
30 if handle == 0:
31 raise gdb.GdbError("handle is 0\n")
32
33 pool_index = parts['pool_index_plus_1'] - 1
34 if pool_index >= pools_num:
35 gdb.write("pool index %d out of bounds (%d) for stack id 0x%08x\n" % (parts['pool_index'], pools_num, handle))
36 return gdb.Value(0), 0
37
38 stack_pools = gdb.parse_and_eval('stack_pools')
39
40 try:
41 pool = stack_pools[pool_index]
42 stack = (pool + gdb.Value(offset).cast(utils.get_size_t_type())).cast(stack_record_type.get_type().pointer())
43 size = int(stack['size'].cast(utils.get_ulong_type()))
44 return stack['entries'], size
45 except Exception as e:
46 gdb.write("%s\n" % e)
47 return gdb.Value(0), 0
48
49def stack_depot_print(handle):
50 if not constants.LX_CONFIG_STACKDEPOT:
51 raise gdb.GdbError("CONFIG_STACKDEPOT is not enabled")
52
53 entries, nr_entries = stack_depot_fetch(handle)
54 if nr_entries > 0:
55 for i in range(0, nr_entries):
56 try:
57 gdb.execute("x /i 0x%x" % (int(entries[i])))
58 except Exception as e:
59 gdb.write("%s\n" % e)