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91 lines
2.6 KiB
ReStructuredText
91 lines
2.6 KiB
ReStructuredText
.. _gdb_plugin:
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===========
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GDB Plug-In
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===========
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Debugging LVGL with GDB
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-----------------------
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To facilitate debugging LVGL with GDB, a GDB plugin is provided. This plugin
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can be found in the ``lvgl/scripts/gdb`` directory. The GDB plugin can be used
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with any target where GDB is available. For example, you can use it to debug a
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device connected to a PC via JLink, which provides a GDB server. Additionally,
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if your device crashes and you have a core dump, you can use GDB to analyze the
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core dump. To load the LVGL GDB plugin within GDB's command line, type the
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following command:
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``source lvgl/scripts/gdb/gdbinit.py``
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Example of usage:
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.. code:: bash
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(gdb) source lvgl/scripts/gdb/gdbinit.py
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(gdb) dump obj -L 2
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obj@0x60700000dd10 (0,0,799,599)
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tabview@0x608000204ca0 (0,0,799,599)
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obj@0x607000025da0 (0,0,799,69)
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obj@0x607000025e80 (0,70,799,599)
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obj@0x60700002bd70 (743,543,791,591)
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btn@0x60700002c7f0 (747,547,787,587)
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keyboard@0x60d0000f7040 (0,300,799,599)
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dropdown-list@0x608000205420 (0,0,129,129)
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label@0x60d0000f7ba0 (22,22,56,39)
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(gdb)
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The plugin provides the following commands.
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- ``dump obj``: Dump the object tree.
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- ``info style``: Show the object's style.
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Dump obj tree
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-------------
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``dump obj``: Dump the object tree.
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``dump obj -L 2``: Dump the object tree with a depth of 2.
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``dump obj -a 0x60700000dd10``: Dump the object tree starting from the specified address.
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Show obj's style
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----------------
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This command can dump the object's local style, since style value is a union, it's displayed in all possible formats.
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``info style address_of_obj``: Show the object's style.
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Example:
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.. code:: bash
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(gdb) info style 0x60700000dd10
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32 = {num = 90, ptr = 0x5a, color = {blue = 90 'Z', green = 0 '\000', red = 0 '\000'}}
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158 = {num = 32767, ptr = 0x7fff, color = {blue = 255 '\377', green = 127 '\177', red = 0 '\000'}}
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(gdb) p lv_global->disp_default->act_scr
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$4 = (lv_obj_t *) 0x60700000dd10
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(gdb) info style $4
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32 = {num = 90, ptr = 0x5a, color = {blue = 90 'Z', green = 0 '\000', red = 0 '\000'}}
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158 = {num = 32767, ptr = 0x7fff, color = {blue = 255 '\377', green = 127 '\177', red = 0 '\000'}}
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(gdb)
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Connect to Debugger
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-------------------
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This command provides the ability to connect and debug GDB Python Script using IDE.
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Connect to ``PyCharm`` / ``VSCode`` / ``Eclipse(not support yet)``
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``debugger -t pycharm``
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``debugger -t vscode``
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``debugger -t eclipse``
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How to use it specifically, search ``pydevd_pycharm`` / ``debugpy`` for details.
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