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0e1b240a4b
Add support for printing the backtrace of stackdepot handle. This is the preparation patch for dumping page_owner, slabtrace usage. Link: https://lkml.kernel.org/r/20230808083020.22254-6-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
55 lines
1.7 KiB
Python
55 lines
1.7 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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from linux import utils, constants
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if constants.LX_CONFIG_STACKDEPOT:
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stack_record_type = utils.CachedType('struct stack_record')
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DEPOT_STACK_ALIGN = 4
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def stack_depot_fetch(handle):
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global DEPOT_STACK_ALIGN
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global stack_record_type
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stack_depot_disabled = gdb.parse_and_eval('stack_depot_disabled')
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if stack_depot_disabled:
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raise gdb.GdbError("stack_depot_disabled\n")
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handle_parts_t = gdb.lookup_type("union handle_parts")
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parts = handle.cast(handle_parts_t)
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offset = parts['offset'] << DEPOT_STACK_ALIGN
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pool_index_cached = gdb.parse_and_eval('pool_index')
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if parts['pool_index'] > pool_index_cached:
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gdb.write("pool index %d out of bounds (%d) for stack id 0x%08x\n" % (parts['pool_index'], pool_index_cached, handle))
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return gdb.Value(0), 0
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stack_pools = gdb.parse_and_eval('stack_pools')
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try:
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pool = stack_pools[parts['pool_index']]
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stack = (pool + gdb.Value(offset).cast(utils.get_size_t_type())).cast(stack_record_type.get_type().pointer())
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size = int(stack['size'].cast(utils.get_ulong_type()))
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return stack['entries'], size
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except Exception as e:
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gdb.write("%s\n" % e)
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return gdb.Value(0), 0
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def stack_depot_print(handle):
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if not constants.LX_CONFIG_STACKDEPOT:
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raise gdb.GdbError("CONFIG_STACKDEPOT is not enabled")
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entries, nr_entries = stack_depot_fetch(handle)
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if nr_entries > 0:
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for i in range(0, nr_entries):
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try:
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gdb.execute("x /i 0x%x" % (int(entries[i])))
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except Exception as e:
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gdb.write("%s\n" % e)
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