gallium/ddebug: new pipe for hang detection and driver state dumping (v2)

v2: lots of improvements

This is like identity or trace, but simpler. It doesn't wrap most states.

Run with:
  GALLIUM_DDEBUG=1000 [executable]
where "executable" is the app and "1000" is in miliseconds, meaning that
the context will be considered hung if a fence fails to signal in 1000 ms.

If that happens, all shaders, context states, bound resources, draw
parameters, and driver debug information (if any) will be dumped into:
  /home/$username/dd_dumps/$processname_$pid_$index.

Note that the context is flushed after every draw/clear/copy/blit operation
and then waited for to find the exact call that hangs.

You can also do:
  GALLIUM_DDEBUG=always
to do the dumping after every draw/clear/copy/blit operation without
flushing and waiting.

Examples of driver states that can be dumped are:
- Hardware status registers saying which hw block is busy (hung).
- Disassembled shaders in a human-readable form.
- The last submitted command buffer in a human-readable form.

v2: drop pipe-loader changes, drop SConscript
    rename dd.h -> dd_pipe.h

Acked-by: Christian König <[email protected]>
Acked-by: Alex Deucher <[email protected]>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/gallium/drivers/ddebug/Makefile.am b/src/gallium/drivers/ddebug/Makefile.am
new file mode 100644
index 00000000000..f0e1662d0bd
--- /dev/null
+++ b/src/gallium/drivers/ddebug/Makefile.am
@@ -0,0 +1,9 @@
+include Makefile.sources
+include $(top_srcdir)/src/gallium/Automake.inc
+
+AM_CFLAGS = \
+	$(GALLIUM_DRIVER_CFLAGS)
+
+noinst_LTLIBRARIES = libddebug.la
+
+libddebug_la_SOURCES = $(C_SOURCES)