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Diffstat (limited to 'docs/devel/testing')
| -rw-r--r-- | docs/devel/testing/functional.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/docs/devel/testing/functional.rst b/docs/devel/testing/functional.rst index 6b5d0c5b98..b8ad7b0bf7 100644 --- a/docs/devel/testing/functional.rst +++ b/docs/devel/testing/functional.rst @@ -176,6 +176,16 @@ primarily depend on the value of the ``qemu_bin`` class attribute. If it is not explicitly set by the test code, its default value will be the result the QEMU_TEST_QEMU_BINARY environment variable. +Debugging hung QEMU +^^^^^^^^^^^^^^^^^^^ + +When test cases go wrong it may be helpful to debug a stalled QEMU +process. While the QEMUMachine class owns the primary QMP monitor +socket, it is possible to request a second QMP monitor be created +by setting the ``QEMU_TEST_QMP_BACKDOOR`` env variable to refer +to a UNIX socket name. The ``qmp-shell`` command can then be +attached to the stalled QEMU to examine its live state. + Attribute reference ------------------- |