[Lldb-commits] [PATCH] D99744: [lldb] Update test.rst with a paragraph about pdb

Dave Lee via Phabricator via lldb-commits lldb-commits at lists.llvm.org
Thu Apr 1 09:31:48 PDT 2021

kastiglione created this revision.
kastiglione added reviewers: JDevlieghere, jingham.
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Debugging tests sometimes involves debugging the Python source. This adds a paragraph to
the "Debugging Test Failures" section about using `pdb`, and also describes how to run
lldb commands from pdb.

  rG LLVM Github Monorepo



Index: lldb/docs/resources/test.rst
--- lldb/docs/resources/test.rst
+++ lldb/docs/resources/test.rst
@@ -373,7 +373,20 @@
 On non-Windows platforms, you can use the ``-d`` option to ``dotest.py`` which
-will cause the script to wait for a while until a debugger is attached.
+will cause the script to print out the pid of the test and wait for a while
+until a debugger is attached. Then run ``lldb -p <pid>`` to attach.
+To instead debug a test's python source, edit the test and insert
+``import pdb; pdb.set_trace()`` at the point you want to start debugging. In
+addition to pdb's debugging facilities, lldb commands can be executed with the
+help of an lldb alias. For example ``lldb bt`` and ``lldb v some_var``. Add
+this line to your ``~/.pdbrc``:
+alias lldb self.dbg.HandleCommand("%*")
 Debugging Test Failures on Windows

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