[PATCH v3 1/2] support: Add support for running tests in a multi-threaded environment

[Florian Weimer]

* Arjun Shankar:

> It can be useful to be able to write a single-threaded test but run it
> as part of a multi-threaded program simply to exercise glibc
> synchronization code paths, e.g. the malloc implementation.
>
> This commit adds support to enable this kind of testing.  Tests that
> define TEST_IN_THREAD, either as TEST_THREAD_MAIN or TEST_THREAD_WORKER,
> and then use support infrastructure (by including test-driver.c) will be
> accordingly run in either the main thread, or in a second "worker"
> thread while the other thread waits.
>
> This can be used in new tests, or to easily make and run copies of
> existing tests without modifying the tests themselves.
> ---
>  support/Makefile                         |  1 +
>  support/support_test_in_thread_wrapper.c | 96 ++++++++++++++++++++++++
>  support/support_test_main.c              | 25 ++++--
>  support/test-driver.c                    |  8 ++
>  support/test-driver.h                    | 12 +++
>  5 files changed, 136 insertions(+), 6 deletions(-)
>  create mode 100644 support/support_test_in_thread_wrapper.c
>

This looks okay to me.

Reviewed-by: Florian Weimer <fweimer@redhat.com>

Thanks,
Florian