The patch titled
Subject: scripts/gdb: add 'lx-stack_depot_lookup' command.
has been added to the -mm mm-nonmm-unstable branch. Its filename is
scripts-gdb-add-lx-stack_depot_lookup-command.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/scripts-gdb-add-lx-stack_depot_lookup-command.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Kuan-Ying Lee <kuan-ying.lee@xxxxxxxxxxxxx>
Subject: scripts/gdb: add 'lx-stack_depot_lookup' command.
Date: Tue, 23 Jul 2024 14:49:00 +0800
This command allows users to quickly retrieve a stacktrace using a handle
obtained from a memory coredump.
Example output:
(gdb) lx-stack_depot_lookup 0x00c80300
0xffff8000807965b4 <kmem_cache_alloc_noprof+660>: mov x20, x0
0xffff800081a077d8 <kmem_cache_oob_alloc+76>: mov x1, x0
0xffff800081a079a0 <test_version_show+100>: cbnz w0, 0xffff800081a07968 <test_version_show+44>
0xffff800082f4a3fc <kobj_attr_show+60>: ldr x19, [sp, #16]
0xffff800080a0fb34 <sysfs_kf_seq_show+460>: ldp x3, x4, [sp, #96]
0xffff800080a0a550 <kernfs_seq_show+296>: ldp x19, x20, [sp, #16]
0xffff8000808e7b40 <seq_read_iter+836>: mov w5, w0
0xffff800080a0b8ac <kernfs_fop_read_iter+804>: mov x23, x0
0xffff800080914a48 <copy_splice_read+972>: mov x6, x0
0xffff8000809151c4 <do_splice_read+348>: ldr x21, [sp, #32]
Link: https://lkml.kernel.org/r/20240723064902.124154-5-kuan-ying.lee@xxxxxxxxxxxxx
Signed-off-by: Kuan-Ying Lee <kuan-ying.lee@xxxxxxxxxxxxx>
Cc: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Cc: Kieran Bingham <kbingham@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/gdb/linux/stackdepot.py | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
--- a/scripts/gdb/linux/stackdepot.py~scripts-gdb-add-lx-stack_depot_lookup-command
+++ a/scripts/gdb/linux/stackdepot.py
@@ -13,6 +13,13 @@ 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
@@ -57,3 +64,23 @@ def stack_depot_print(handle):
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()
_
Patches currently in -mm which might be from kuan-ying.lee@xxxxxxxxxxxxx are
scripts-gdb-fix-timerlist-parsing-issue.patch
scripts-gdb-add-iteration-function-for-rbtree.patch
scripts-gdb-fix-lx-mounts-command-error.patch
scripts-gdb-add-lx-stack_depot_lookup-command.patch
scripts-gdb-add-lx-kasan_mem_to_shadow-command.patch
