[PATCH 0/5] enhance debugging with qtest framework

[qemu_oss--- via <qemu-devel@nongnu.org>]

This series is a follow-up of the following previous series:
https://lists.gnu.org/archive/html/qemu-devel/2020-10/msg02251.html
The 9p patches of the previous series have already been merged.

This series consists of 2 parts:

1. libqos patch 1 removes a limitation of the qtest/libqos subsystem:
   support for more than one device using the same (official) QEMU device
   name.

   Like discussed in the previous series, if nobody finds this patch useful
   then just ignore it. I needed it in the previou series before but
   eventually decided for a different approach and personally don't need it
   in near future.

2. Patches 2 to 5 enhance debugging issues with the qtest framework. I would
   appreciate if they got merged, because I still find them useful while
   working on new test cases.

Changes of these patches from derived series:

  * Squashed previous patches 1 & 2 -> [patch 1].

  * Dropped ANSI color escape sequences [patch 3].

  * Squashed previous patches 4 & 5 -> [patch 3].

  * Extended commit log to provide more details about purpose [patch 4].

Christian Schoenebeck (5):
  libqos/qgraph: add qos_node_create_driver_named()
  libqos/qgraph_internal: add qos_printf() and qos_printf_literal()
  tests/qtest/qos-test: dump qos graph if verbose
  tests/qtest/qos-test: dump environment variables if verbose
  tests/qtest/qos-test: dump QEMU command if verbose

 tests/qtest/libqos/qgraph.c          | 99 +++++++++++++++++++++++++++-
 tests/qtest/libqos/qgraph.h          | 36 ++++++++++
 tests/qtest/libqos/qgraph_internal.h | 12 ++++
 tests/qtest/qos-test.c               | 15 ++++-
 4 files changed, 158 insertions(+), 4 deletions(-)

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2.20.1