gallium: in drivers, make copy of tokens passed to pipe->create_vs/fs_state()

The caller can then free the token array immediately.

5 files changed, 60 insertions, 9 deletions

diff --git a/src/gallium/auxiliary/draw/draw_vs_exec.c b/src/gallium/auxiliary/draw/draw_vs_exec.c
index 54a2b2ab040..7a02f6334b1 100644
--- a/src/gallium/auxiliary/draw/draw_vs_exec.c
+++ b/src/gallium/auxiliary/draw/draw_vs_exec.c
@@ -39,6 +39,7 @@
 #include "draw_vs.h"
 
 #include "tgsi/util/tgsi_parse.h"
+#include "tgsi/util/tgsi_scan.h"
 
 
 struct exec_vertex_shader {
@@ -165,21 +166,23 @@ draw_create_vs_exec(struct draw_context *draw,
 		    const struct pipe_shader_state *state)
 {
    struct exec_vertex_shader *vs = CALLOC_STRUCT( exec_vertex_shader );
-   uint nt = tgsi_num_tokens(state->tokens);
 
    if (vs == NULL) 
       return NULL;
 
    /* we make a private copy of the tokens */
-   vs->base.state.tokens = mem_dup(state->tokens, nt * sizeof(state->tokens[0]));
-   tgsi_scan_shader(state->tokens, &vs->base.info);
+   vs->base.state.tokens = tgsi_dup_tokens(state->tokens);
+   if (!vs->base.state.tokens) {
+      FREE(vs);
+      return NULL;
+   }
 
+   tgsi_scan_shader(state->tokens, &vs->base.info);
 
    vs->base.prepare = vs_exec_prepare;
    vs->base.run_linear = vs_exec_run_linear;
    vs->base.delete = vs_exec_delete;
    vs->machine = &draw->machine;
 
-
    return &vs->base;
 }
diff --git a/src/gallium/auxiliary/draw/draw_vs_llvm.c b/src/gallium/auxiliary/draw/draw_vs_llvm.c
index dcada665143..be6907ed042 100644
--- a/src/gallium/auxiliary/draw/draw_vs_llvm.c
+++ b/src/gallium/auxiliary/draw/draw_vs_llvm.c
@@ -138,14 +138,17 @@ draw_create_vs_llvm(struct draw_context *draw,
 		    const struct pipe_shader_state *templ)
 {
    struct draw_llvm_vertex_shader *vs;
-   uint nt = tgsi_num_tokens(templ->tokens);
 
    vs = CALLOC_STRUCT( draw_llvm_vertex_shader );
    if (vs == NULL) 
       return NULL;
 
    /* we make a private copy of the tokens */
-   vs->base.state.tokens = mem_dup(templ->tokens, nt * sizeof(templ->tokens[0]));
+   vs->base.state.tokens = tgsi_dup_tokens(templ->tokens);
+   if (!vs->base.state.tokens) {
+      FREE(vs);
+      return NULL;
+   }
 
    tgsi_scan_shader(vs->base.state.tokens, &vs->base.info);
 
diff --git a/src/gallium/auxiliary/draw/draw_vs_sse.c b/src/gallium/auxiliary/draw/draw_vs_sse.c
index a57c938fbf1..5929ea76b23 100644
--- a/src/gallium/auxiliary/draw/draw_vs_sse.c
+++ b/src/gallium/auxiliary/draw/draw_vs_sse.c
@@ -188,7 +188,6 @@ draw_create_vs_sse(struct draw_context *draw,
                           const struct pipe_shader_state *templ)
 {
    struct draw_sse_vertex_shader *vs;
-   uint nt = tgsi_num_tokens(templ->tokens);
 
    if (!rtasm_cpu_has_sse2())
       return NULL;
@@ -198,7 +197,9 @@ draw_create_vs_sse(struct draw_context *draw,
       return NULL;
 
    /* we make a private copy of the tokens */
-   vs->base.state.tokens = mem_dup(templ->tokens, nt * sizeof(templ->tokens[0]));
+   vs->base.state.tokens = tgsi_dup_tokens(templ->tokens);
+   if (!vs->base.state.tokens)
+      goto fail;
 
    tgsi_scan_shader(templ->tokens, &vs->base.info);
 
diff --git a/src/gallium/auxiliary/tgsi/util/tgsi_parse.c b/src/gallium/auxiliary/tgsi/util/tgsi_parse.c
index 5bea7738401..5c0b0bfd61b 100644
--- a/src/gallium/auxiliary/tgsi/util/tgsi_parse.c
+++ b/src/gallium/auxiliary/tgsi/util/tgsi_parse.c
@@ -330,3 +330,18 @@ tgsi_num_tokens(const struct tgsi_token *tokens)
    }
    return 0;
 }
+
+
+/**
+ * Make a new copy of a token array.
+ */
+struct tgsi_token *
+tgsi_dup_tokens(const struct tgsi_token *tokens)
+{
+   unsigned n = tgsi_num_tokens(tokens);
+   unsigned bytes = n * sizeof(struct tgsi_token);
+   struct tgsi_token *new_tokens = (struct tgsi_token *) MALLOC(bytes);
+   if (new_tokens)
+      memcpy(new_tokens, tokens, bytes);
+   return new_tokens;
+}
diff --git a/src/gallium/auxiliary/tgsi/util/tgsi_parse.h b/src/gallium/auxiliary/tgsi/util/tgsi_parse.h
index 15e76feb7ca..41021010936 100644
--- a/src/gallium/auxiliary/tgsi/util/tgsi_parse.h
+++ b/src/gallium/auxiliary/tgsi/util/tgsi_parse.h
@@ -1,4 +1,31 @@
-#if !defined TGSI_PARSE_H
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#ifndef TGSI_PARSE_H
 #define TGSI_PARSE_H
 
 #include "pipe/p_shader_tokens.h"
@@ -118,6 +145,8 @@ tgsi_parse_token(
 unsigned
 tgsi_num_tokens(const struct tgsi_token *tokens);
 
+struct tgsi_token *
+tgsi_dup_tokens(const struct tgsi_token *tokens);
 
 #if defined __cplusplus
 }