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authorEmanuele Giuseppe Esposito <eesposit@redhat.com>2021-08-09 11:01:07 +0200
committerHanna Reitz <hreitz@redhat.com>2021-09-01 12:57:31 +0200
commite92ecc322cd60be749309afda0d17d464961a230 (patch)
tree4b174f1b08fe4b004bfe9c7f10d3fb29e720d74f
parent4d14db0468b7b6495aae1d9de4efe2dc1d5c513d (diff)
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docs/devel/testing: add -gdb option to the debugging section of QEMU iotests
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <20210809090114.64834-10-eesposit@redhat.com> Signed-off-by: Hanna Reitz <hreitz@redhat.com>
-rw-r--r--docs/devel/testing.rst11
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst
index 8359f2a..01e1919 100644
--- a/docs/devel/testing.rst
+++ b/docs/devel/testing.rst
@@ -229,6 +229,17 @@ Debugging a test case
The following options to the ``check`` script can be useful when debugging
a failing test:
+* ``-gdb`` wraps every QEMU invocation in a ``gdbserver``, which waits for a
+ connection from a gdb client. The options given to ``gdbserver`` (e.g. the
+ address on which to listen for connections) are taken from the ``$GDB_OPTIONS``
+ environment variable. By default (if ``$GDB_OPTIONS`` is empty), it listens on
+ ``localhost:12345``.
+ It is possible to connect to it for example with
+ ``gdb -iex "target remote $addr"``, where ``$addr`` is the address
+ ``gdbserver`` listens on.
+ If the ``-gdb`` option is not used, ``$GDB_OPTIONS`` is ignored,
+ regardless of whether it is set or not.
+
* ``-d`` (debug) just increases the logging verbosity, showing
for example the QMP commands and answers.