gallium: implement bounds checking for constant buffers

Plumb the constant buffer sizes down into the tgsi interpreter where
we can do bounds checking.  Optional debug code warns upon out-of-bounds
reading.  Plus add a few other assertions in the TGSI interpreter.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.h b/src/gallium/auxiliary/tgsi/tgsi_exec.h
index ccf80ca6fd9..6dee362d589 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.h
@@ -253,7 +253,10 @@ struct tgsi_exec_machine
    struct tgsi_sampler           **Samplers;
 
    unsigned                      ImmLimit;
+
    const void *Consts[PIPE_MAX_CONSTANT_BUFFERS];
+   unsigned ConstsSize[PIPE_MAX_CONSTANT_BUFFERS];
+
    const struct tgsi_token       *Tokens;   /**< Declarations, instructions */
    unsigned                      Processor; /**< TGSI_PROCESSOR_x */
 
@@ -367,6 +370,13 @@ tgsi_set_exec_mask(struct tgsi_exec_machine *mach,
 }
 
 
+extern void
+tgsi_exec_set_constant_buffers(struct tgsi_exec_machine *mach,
+                               unsigned num_bufs,
+                               const void **bufs,
+                               const unsigned *buf_sizes);
+
+
 #if defined __cplusplus
 } /* extern "C" */
 #endif