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tools/gdb: add info shm command

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(gdb) info shm
  /var/shm/xms:bq-325-1044165565 memsize: 1536000, paddr: 0x41de3970
  /var/shm/xms:bq-325-2123092606 memsize: 1536000, paddr: 0x41f5a9a8
  /var/shm/xms:fakemq-325-1835096569 memsize: 12, paddr: 0x420d19e0
(gdb)

Signed-off-by: xuxingliang <xuxingliang@xiaomi.com>
This commit is contained in:
xuxingliang 2024-09-05 17:12:34 +08:00 • committed by Xiang Xiao
parent 4e2ad314d7
commit 992d5e0127
1 changed files with 66 additions and 2 deletions
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68
tools/gdb/fs.py
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@ -19,12 +19,12 @@
############################################################################
import argparse
import enum
import gdb
import utils
FSNODEFLAG_TYPE_MASK = utils.get_symbol_value("FSNODEFLAG_TYPE_MASK")
FSNODEFLAG_TYPE_MOUNTPT = utils.get_symbol_value("FSNODEFLAG_TYPE_MOUNTPT")
CONFIG_PSEUDOFS_FILE = utils.get_symbol_value("CONFIG_PSEUDOFS_FILE")
CONFIG_PSEUDOFS_ATTRIBUTES = utils.get_symbol_value("CONFIG_PSEUDOFS_ATTRIBUTES")
@ -33,6 +33,35 @@ CONFIG_FS_BACKTRACE = utils.get_symbol_value("CONFIG_FS_BACKTRACE")
CONFIG_NFILE_DESCRIPTORS_PER_BLOCK = int(
utils.get_symbol_value("CONFIG_NFILE_DESCRIPTORS_PER_BLOCK")
)
CONFIG_FS_SHMFS = utils.get_symbol_value("CONFIG_FS_SHMFS")
class InodeType(enum.Enum):
# define FSNODEFLAG_TYPE_PSEUDODIR 0x00000000 /* Pseudo dir (default) */
# define FSNODEFLAG_TYPE_DRIVER 0x00000001 /* Character driver */
# define FSNODEFLAG_TYPE_BLOCK 0x00000002 /* Block driver */
# define FSNODEFLAG_TYPE_MOUNTPT 0x00000003 /* Mount point */
# define FSNODEFLAG_TYPE_NAMEDSEM 0x00000004 /* Named semaphore */
# define FSNODEFLAG_TYPE_MQUEUE 0x00000005 /* Message Queue */
# define FSNODEFLAG_TYPE_SHM 0x00000006 /* Shared memory region */
# define FSNODEFLAG_TYPE_MTD 0x00000007 /* Named MTD driver */
# define FSNODEFLAG_TYPE_SOFTLINK 0x00000008 /* Soft link */
# define FSNODEFLAG_TYPE_SOCKET 0x00000009 /* Socket */
# define FSNODEFLAG_TYPE_PIPE 0x0000000a /* Pipe */
# define FSNODEFLAG_TYPE_NAMEDEVENT 0x0000000b /* Named event group */
PSEUDODIR = 0
DRIVER = 1
BLOCK = 2
MOUNTPT = 3
NAMEDSEM = 4
MQUEUE = 5
SHM = 6
MTD = 7
SOFTLINK = 8
SOCKET = 9
PIPE = 10
NAMEDEVENT = 11
UNKNOWN = 12
def get_inode_name(inode):
@ -55,6 +84,19 @@ def inode_getpath(inode):
return name
def inode_gettype(inode) -> InodeType:
if not inode:
return InodeType.UNKNOWN
type = int(inode["i_flags"] & FSNODEFLAG_TYPE_MASK)
# check if it's a valid type in InodeType
if type in [e.value for e in InodeType]:
return InodeType(type)
return InodeType.UNKNOWN
def get_file(tcb, fd):
group = tcb["group"]
filelist = group["tg_filelist"]
@ -183,7 +225,7 @@ class Mount(gdb.Command):
super(Mount, self).__init__("mount", gdb.COMMAND_USER)
def mountpt_filter(self, node, path):
if node["i_flags"] & FSNODEFLAG_TYPE_MASK == FSNODEFLAG_TYPE_MOUNTPT:
if inode_gettype(node) == InodeType.MOUNTPT:
statfs = node["u"]["i_mops"]["statfs"]
funcname = gdb.block_for_pc(int(statfs)).function.print_name
fstype = funcname.split("_")[0]
@ -295,9 +337,31 @@ class ForeachInode(gdb.Command):
self.print_inode_info(arg["root_inode"], 1, "")
class InfoShmfs(gdb.Command):
"""Show share memory usage"""
def __init__(self):
super(InfoShmfs, self).__init__("info shm", gdb.COMMAND_USER)
def shm_filter(self, node, path):
if inode_gettype(node) != InodeType.SHM:
return
obj = node["i_private"].cast(gdb.lookup_type("struct shmfs_object_s").pointer())
length = obj["length"]
paddr = obj["paddr"]
print(f" {path} memsize: {length}, paddr: {paddr}")
def invoke(self, args, from_tty):
foreach_inode(self.shm_filter)
Fdinfo()
if not utils.get_symbol_value("CONFIG_DISABLE_MOUNTPOINT"):
Mount()
ForeachInode()
if CONFIG_FS_SHMFS:
InfoShmfs()