60 lines
1.4 KiB
Python
60 lines
1.4 KiB
Python
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#
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# gdb helper commands and functions for Linux kernel debugging
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#
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# VFS tools
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#
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# Copyright (c) 2023 Glenn Washburn
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# Copyright (c) 2016 Linaro Ltd
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#
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# Authors:
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# Glenn Washburn <development@efficientek.com>
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# Kieran Bingham <kieran.bingham@linaro.org>
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#
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# This work is licensed under the terms of the GNU GPL version 2.
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#
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import gdb
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from linux import utils
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def dentry_name(d):
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parent = d['d_parent']
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if parent == d or parent == 0:
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return ""
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p = dentry_name(d['d_parent']) + "/"
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return p + d['d_iname'].string()
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class DentryName(gdb.Function):
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"""Return string of the full path of a dentry.
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$lx_dentry_name(PTR): Given PTR to a dentry struct, return a string
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of the full path of the dentry."""
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def __init__(self):
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super(DentryName, self).__init__("lx_dentry_name")
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def invoke(self, dentry_ptr):
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return dentry_name(dentry_ptr)
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DentryName()
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dentry_type = utils.CachedType("struct dentry")
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class InodeDentry(gdb.Function):
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"""Return dentry pointer for inode.
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$lx_i_dentry(PTR): Given PTR to an inode struct, return a pointer to
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the associated dentry struct, if there is one."""
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def __init__(self):
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super(InodeDentry, self).__init__("lx_i_dentry")
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def invoke(self, inode_ptr):
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d_u = inode_ptr["i_dentry"]["first"]
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if d_u == 0:
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return ""
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return utils.container_of(d_u, dentry_type.get_type().pointer(), "d_u")
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InodeDentry()
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