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2524b7dfb0
Add a python script which implements the bulk of this functionality. Over time, this would ideally evolve into a library of python routines which can be used to inspect kernel data structures and automate some debugging tasks, similar to jhb's out-of-tree scripts, but written in a somewhat nicer language and with better integration into the kgdb command prompt. Note that kgdb currently won't auto-load scripts in this directory. This should perhaps change in the future. It probably also makes more sense to have a crashinfo.py which provides all the kgdb output that we want to include in core.txt, rather than having crashinfo.sh pipe in several commands. Reviewed by: avg, imp Discussed with: jhb MFC after: 3 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D33817
64 lines
1.5 KiB
Python
64 lines
1.5 KiB
Python
#-
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# Copyright (c) 2022 The FreeBSD Foundation
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#
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# This software was developed by Mark Johnston under sponsorship from the
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# FreeBSD Foundation.
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#
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import gdb
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def symval(name):
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return gdb.lookup_global_symbol(name).value()
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def tid_to_gdb_thread(tid):
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for thread in gdb.inferiors()[0].threads():
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if thread.ptid[2] == tid:
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return thread
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else:
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return None
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def all_pcpus():
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mp_maxid = symval("mp_maxid")
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cpuid_to_pcpu = symval("cpuid_to_pcpu")
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cpu = 0
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while cpu <= mp_maxid:
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pcpu = cpuid_to_pcpu[cpu]
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if pcpu:
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yield pcpu
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cpu = cpu + 1
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class acttrace(gdb.Command):
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def __init__(self):
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super(acttrace, self).__init__("acttrace", gdb.COMMAND_USER)
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def invoke(self, arg, from_tty):
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# Save the current thread so that we can switch back after.
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curthread = gdb.selected_thread()
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for pcpu in all_pcpus():
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td = pcpu['pc_curthread']
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tid = td['td_tid']
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gdb_thread = tid_to_gdb_thread(tid)
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if gdb_thread is None:
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print("failed to find GDB thread with TID {}".format(tid))
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else:
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gdb_thread.switch()
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p = td['td_proc']
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print("Tracing command {} pid {} tid {} (CPU {})".format(
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p['p_comm'], p['p_pid'], td['td_tid'], pcpu['pc_cpuid']))
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gdb.execute("bt")
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print()
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curthread.switch()
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# Registers the command with gdb, doesn't do anything.
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acttrace()
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