Christopher Haster
0b804c092b
These just invoke the existing dbg*.py python scripts, but allow quick references to variables in the debugginged process: (gdb) dbgflags o file->b.o.flags LFS3_O_RDWR 0x00000002 Open a file as read and write LFS3_o_REG 0x10000000 Type = regular-file LFS3_o_UNSYNC 0x01000000 File's metadata does not match disk Quite neat and useful! This works by injecting dbg.gdb.py via gdb -x, which includes the necessary python hooks to add these commands to gdb. This can be overridden/extended with test.py/bench.py's --gdb-script flag. Currently limited to scripts that seem the most useful for process internals: - dbgerr - Decode littlefs error codes - dbgflags - Decode littlefs flags - dbgtag - Decode littlefs tags
98 lines
2.6 KiB
Python
98 lines
2.6 KiB
Python
#
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# hooks for gdb:
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# (gdb) source ./scripts/dbg.gdb.py
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#
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#
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# dbgerr
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class DbgErr(gdb.Command):
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"""Decode littlefs error codes. See -h/--help for more info."""
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def __init__(self):
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super().__init__("dbgerr",
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gdb.COMMAND_DATA,
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gdb.COMPLETE_EXPRESSION)
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def invoke(self, args, *_):
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args = args.split()
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# find nonflags
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nonflags = []
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for i, a in enumerate(args):
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if not a.startswith('-'):
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nonflags.append(i)
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# parse and eval
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for i, n in enumerate(nonflags):
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try:
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args[n] = '%d' % gdb.parse_and_eval(args[n])
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except gdb.error as e:
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raise gdb.GdbError(e)
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# execute
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gdb.execute(' '.join(['!./scripts/dbgerr.py'] + args))
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DbgErr()
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# dbgflags
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class DbgFlags(gdb.Command):
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"""Decode littlefs flags. See -h/--help for more info."""
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def __init__(self):
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super().__init__("dbgflags",
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gdb.COMMAND_DATA,
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gdb.COMPLETE_EXPRESSION)
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def invoke(self, args, *_):
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args = args.split()
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# hack, but don't eval if -l or --list specified
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if '-l' not in args and '--list' not in args:
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# find nonflags
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nonflags = []
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for i, a in enumerate(args):
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if not a.startswith('-'):
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nonflags.append(i)
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# parse and eval
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for i, n in enumerate(nonflags):
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# dbgflags is special in that first arg may be prefix
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if i > 0 or len(nonflags) <= 1:
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try:
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args[n] = '%d' % gdb.parse_and_eval(args[n])
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except gdb.error as e:
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raise gdb.GdbError(e)
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# execute
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gdb.execute(' '.join(['!./scripts/dbgflags.py'] + args))
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DbgFlags()
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# dbgtag
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class DbgTag(gdb.Command):
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"""Decode littlefs tags. See -h/--help for more info."""
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def __init__(self):
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super().__init__("dbgtag",
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gdb.COMMAND_DATA,
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gdb.COMPLETE_EXPRESSION)
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def invoke(self, args, *_):
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args = args.split()
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# find nonflags
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nonflags = []
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for i, a in enumerate(args):
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if not a.startswith('-'):
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nonflags.append(i)
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# parse and eval
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for i, n in enumerate(nonflags):
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try:
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args[n] = '%d' % gdb.parse_and_eval(args[n])
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except gdb.error as e:
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raise gdb.GdbError(e)
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# execute
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gdb.execute(' '.join(['!./scripts/dbgtag.py'] + args))
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DbgTag()
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