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lib/igt_aux: Divert ioctls for signal injection

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To simplify and speed up running interruptible tests, use a custom
ioctl() function that control the signaling and detect when we need no
more iterations to trigger an interruption.

We use a realtime timer to inject the signal after a certain delay,
increasing the delay on every loop to try and exercise different code
paths within the function. The first delay is very short such that we
hopefully enter the kernel with a pending signal.

Clients should use

struct igt_sigiter iter = {};
while (igt_sigiter_repeat(&iter, enable_interrupts=true))
	do_test()

to automatically repeat the test until we can inject no more signals
into the ioctls. This is condensed into a macro

igt_interruptible(enable_interrupts=true)
	do_test();

for convenience.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2016-03-19 13:04:02 +00:00
parent c1fed522ae
commit d545610861
10 changed files with 217 additions and 7 deletions
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debugger/Makefile.am
+1 -1
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@@ -15,4 +15,4 @@ AM_CFLAGS = \
$(LIBUNWIND_CFLAGS) \
$(CWARNFLAGS)
LDADD = $(top_builddir)/lib/libintel_tools.la $(DRM_LIBS) $(PCIACCESS_LIBS) $(CAIRO_LIBS) $(LIBUNWIND_LIBS)
LDADD = $(top_builddir)/lib/libintel_tools.la $(DRM_LIBS) $(PCIACCESS_LIBS) $(CAIRO_LIBS) $(LIBUNWIND_LIBS) $(TIMER_LIBS)