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74 lines
2.0 KiB
Plaintext
74 lines
2.0 KiB
Plaintext
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Online doc for writing mi commands in python.
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https://sourceware.org/gdb/current/onlinedocs/gdb.html/GDB_002fMI-Commands-In-Python.html#GDB_002fMI-Commands-In-Python
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The following code snippet shows how some trivial MI commands can be implemented in Python:
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class MIEcho(gdb.MICommand):
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"""Echo arguments passed to the command."""
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def __init__(self, name, mode):
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self._mode = mode
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super(MIEcho, self).__init__(name)
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def invoke(self, argv):
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if self._mode == 'dict':
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return { 'dict': { 'argv' : argv } }
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elif self._mode == 'list':
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return { 'list': argv }
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else:
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return { 'string': ", ".join(argv) }
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MIEcho("-echo-dict", "dict")
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MIEcho("-echo-list", "list")
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MIEcho("-echo-string", "string")
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The last three lines instantiate the class three times, creating three new GDB/MI commands -echo-dict, -echo-list, and -echo-string. Each time a subclass of gdb.MICommand is instantiated, the new command is automatically registered with GDB.
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Source the py file at the gdb prompt.
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(gdb) source MIEcho.py
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Depending on how the Python code is read into GDB, you may need to import the gdb module explicitly.
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The following example shows a GDB session in which the above commands have been added:
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(gdb)
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-echo-dict abc def ghi
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^done,dict={argv=["abc","def","ghi"]}
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(gdb)
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-echo-list abc def ghi
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^done,list=["abc","def","ghi"]
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(gdb)
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-echo-string abc def ghi
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^done,string="abc, def, ghi"
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(gdb)
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Here's a simple non-MI command added with python to gdb.
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class HelloWorld (gdb.Command):
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"""Greet the whole world."""
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def __init__ (self):
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super (HelloWorld, self).__init__ ("hello-world", gdb.COMMAND_USER)
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def invoke (self, arg, from_tty):
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print ("Hello, World!")
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HelloWorld ()
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Put it in a .py file and load it in gdb.
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(gdb) source HelloWorld.py
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Then execute it.
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(gdb) hello-world
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Hello, World!
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