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6620999f0d
vmap_area does not exist on no-MMU, therefore the GDB scripts fail to
load:
Traceback (most recent call last):
File "<...>/vmlinux-gdb.py", line 51, in <module>
import linux.vmalloc
File "<...>/scripts/gdb/linux/vmalloc.py", line 14, in <module>
vmap_area_ptr_type = vmap_area_type.get_type().pointer()
^^^^^^^^^^^^^^^^^^^^^^^^^
File "<...>/scripts/gdb/linux/utils.py", line 28, in get_type
self._type = gdb.lookup_type(self._name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
gdb.error: No struct type named vmap_area.
To fix this, disable the command and add an informative error message if
CONFIG_MMU is not defined, following the example of lx-slabinfo.
Link: https://lkml.kernel.org/r/20231031202235.2655333-2-ben.wolsieffer@hefring.com
Fixes: 852622bf36 ("scripts/gdb/vmalloc: add vmallocinfo support")
Signed-off-by: Ben Wolsieffer <ben.wolsieffer@hefring.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
60 lines
2.1 KiB
Python
60 lines
2.1 KiB
Python
# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (c) 2023 MediaTek Inc.
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#
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# Authors:
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# Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
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#
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import gdb
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import re
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from linux import lists, utils, stackdepot, constants, mm
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if constants.LX_CONFIG_MMU:
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vmap_area_type = utils.CachedType('struct vmap_area')
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vmap_area_ptr_type = vmap_area_type.get_type().pointer()
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def is_vmalloc_addr(x):
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pg_ops = mm.page_ops().ops
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addr = pg_ops.kasan_reset_tag(x)
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return addr >= pg_ops.VMALLOC_START and addr < pg_ops.VMALLOC_END
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class LxVmallocInfo(gdb.Command):
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"""Show vmallocinfo"""
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def __init__(self):
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super(LxVmallocInfo, self).__init__("lx-vmallocinfo", gdb.COMMAND_DATA)
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def invoke(self, arg, from_tty):
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if not constants.LX_CONFIG_MMU:
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raise gdb.GdbError("Requires MMU support")
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vmap_area_list = gdb.parse_and_eval('vmap_area_list')
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for vmap_area in lists.list_for_each_entry(vmap_area_list, vmap_area_ptr_type, "list"):
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if not vmap_area['vm']:
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gdb.write("0x%x-0x%x %10d vm_map_ram\n" % (vmap_area['va_start'], vmap_area['va_end'],
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vmap_area['va_end'] - vmap_area['va_start']))
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continue
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v = vmap_area['vm']
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gdb.write("0x%x-0x%x %10d" % (v['addr'], v['addr'] + v['size'], v['size']))
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if v['caller']:
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gdb.write(" %s" % str(v['caller']).split(' ')[-1])
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if v['nr_pages']:
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gdb.write(" pages=%d" % v['nr_pages'])
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if v['phys_addr']:
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gdb.write(" phys=0x%x" % v['phys_addr'])
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if v['flags'] & constants.LX_VM_IOREMAP:
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gdb.write(" ioremap")
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if v['flags'] & constants.LX_VM_ALLOC:
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gdb.write(" vmalloc")
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if v['flags'] & constants.LX_VM_MAP:
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gdb.write(" vmap")
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if v['flags'] & constants.LX_VM_USERMAP:
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gdb.write(" user")
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if v['flags'] & constants.LX_VM_DMA_COHERENT:
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gdb.write(" dma-coherent")
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if is_vmalloc_addr(v['pages']):
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gdb.write(" vpages")
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gdb.write("\n")
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LxVmallocInfo()
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