diff options
Diffstat (limited to 'lib/igt_aux.h')
| -rw-r--r-- | lib/igt_aux.h | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/lib/igt_aux.h b/lib/igt_aux.h index f66de721..faaf56ac 100644 --- a/lib/igt_aux.h +++ b/lib/igt_aux.h @@ -43,13 +43,34 @@ void igt_stop_signal_helper(void); void igt_fork_hang_detector(int fd); void igt_stop_hang_detector(void); -struct igt_sigiter { +struct __igt_sigiter { unsigned pass; }; -bool igt_sigiter_continue(struct igt_sigiter *iter, bool interrupt); -#define igt_interruptible(E) \ - for (struct igt_sigiter iter__={}; igt_sigiter_continue(&iter__, (E)); ) +bool __igt_sigiter_continue(struct __igt_sigiter *iter, bool interrupt); + +/** + * igt_while_interruptible: + * @enable: enable igt_ioctl interrupting or not + * + * Provides control flow such that all drmIoctl() (strictly igt_ioctl()) + * within the loop are forcibly injected with signals (SIGRTMIN). + * + * This is useful to exercise ioctl error paths, at least where those can be + * exercises by interrupting blocking waits, like stalling for the gpu. + * + * The code block attached to this macro is run in a loop with doubling the + * interrupt timeout on each ioctl for every run, until no ioctl gets + * interrupted any more. The starting timeout is taken to be the signal delivery + * latency, measured at runtime. This way the any ioctls called from this code + * block should be exhaustively tested for all signal interruption paths. + * + * Note that since this overloads the igt_ioctl(), this method is not useful + * for widespread signal injection, for example providing coverage of + * pagefaults. To interrupt everything, see igt_fork_signal_helper(). + */ +#define igt_while_interruptible(enable) \ + for (struct __igt_sigiter iter__={}; __igt_sigiter_continue(&iter__, (enable)); ) #define igt_timeout(T) \ for (struct timespec t__={}; igt_seconds_elapsed(&t__) < (T); ) |