Close memory leaks in glsl_type (constructor and get_array_instance)

Add a talloc ctx to both get_array_instance and the glsl_type
constructor in order to be able to call talloc_size instead of
malloc.

This fix now makes glsl-orangebook-ch06-bump.frag 99.99% leak free:

	total heap usage: 55,623 allocs, 55,615

Only 8 missing frees now.

6 files changed, 25 insertions, 18 deletions

diff --git a/ast_function.cpp b/ast_function.cpp
index 9550d4d..761af00 100644
--- a/ast_function.cpp
+++ b/ast_function.cpp
@@ -279,7 +279,8 @@ process_array_constructor(exec_list *instructions,
 
    if (constructor_type->length == 0) {
       constructor_type =
-	 glsl_type::get_array_instance(constructor_type->element_type(),
+	 glsl_type::get_array_instance(state,
+				       constructor_type->element_type(),
 				       parameter_count);
       assert(constructor_type != NULL);
       assert(constructor_type->length == parameter_count);
diff --git a/ast_to_hir.cpp b/ast_to_hir.cpp
index eafc9e8..38e344f 100644
--- a/ast_to_hir.cpp
+++ b/ast_to_hir.cpp
@@ -506,7 +506,8 @@ do_assignment(exec_list *instructions, struct _mesa_glsl_parse_state *state,
 			     var->max_array_access);
 	 }
 
-	 var->type = glsl_type::get_array_instance(lhs->type->element_type(),
+	 var->type = glsl_type::get_array_instance(state,
+						   lhs->type->element_type(),
 						   rhs->type->array_size());
       }
    }
@@ -1409,7 +1410,7 @@ process_array_type(const glsl_type *base, ast_node *array_size,
       }
    }
 
-   return glsl_type::get_array_instance(base, length);
+   return glsl_type::get_array_instance(state, base, length);
 }
 
 
diff --git a/glsl_types.cpp b/glsl_types.cpp
index 7dcb4a4..d1b9dc6 100644
--- a/glsl_types.cpp
+++ b/glsl_types.cpp
@@ -574,7 +574,7 @@ _mesa_glsl_initialize_constructors(exec_list *instructions,
 }
 
 
-glsl_type::glsl_type(const glsl_type *array, unsigned length) :
+glsl_type::glsl_type(void *ctx, const glsl_type *array, unsigned length) :
    base_type(GLSL_TYPE_ARRAY),
    sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
    sampler_type(0),
@@ -588,7 +588,7 @@ glsl_type::glsl_type(const glsl_type *array, unsigned length) :
     * NUL.
     */
    const unsigned name_length = strlen(array->name) + 10 + 3;
-   char *const n = (char *) malloc(name_length);
+   char *const n = (char *) talloc_size(ctx, name_length);
 
    if (length == 0)
       snprintf(n, name_length, "%s[]", array->name);
@@ -691,9 +691,10 @@ glsl_type::array_key_hash(const void *a)
 
 
 const glsl_type *
-glsl_type::get_array_instance(const glsl_type *base, unsigned array_size)
+glsl_type::get_array_instance(void *ctx, const glsl_type *base,
+			      unsigned array_size)
 {
-   const glsl_type key(base, array_size);
+   const glsl_type key(ctx, base, array_size);
 
    if (array_types == NULL) {
       array_types = hash_table_ctor(64, array_key_hash, array_key_compare);
@@ -701,7 +702,7 @@ glsl_type::get_array_instance(const glsl_type *base, unsigned array_size)
 
    const glsl_type *t = (glsl_type *) hash_table_find(array_types, & key);
    if (t == NULL) {
-      t = new glsl_type(base, array_size);
+      t = new glsl_type(ctx, base, array_size);
 
       hash_table_insert(array_types, (void *) t, t);
    }
diff --git a/glsl_types.h b/glsl_types.h
index 939c173..baec763 100644
--- a/glsl_types.h
+++ b/glsl_types.h
@@ -198,7 +198,8 @@ struct glsl_type {
    /**
     * Get the instance of an array type
     */
-   static const glsl_type *get_array_instance(const glsl_type *base,
+   static const glsl_type *get_array_instance(void *ctx,
+					      const glsl_type *base,
 					      unsigned elements);
 
    /**
@@ -387,7 +388,7 @@ private:
    /**
     * Constructor for array types
     */
-   glsl_type(const glsl_type *array, unsigned length);
+   glsl_type(void *ctx, const glsl_type *array, unsigned length);
 
    /** Hash table containing the known array types. */
    static struct hash_table *array_types;
diff --git a/ir_reader.cpp b/ir_reader.cpp
index d6985c4..7383c42 100644
--- a/ir_reader.cpp
+++ b/ir_reader.cpp
@@ -138,7 +138,7 @@ read_type(_mesa_glsl_parse_state *st, s_expression *expr)
 	    return NULL;
 	 }
 
-	 return glsl_type::get_array_instance(base_type, size->value());
+	 return glsl_type::get_array_instance(st, base_type, size->value());
       } else if (strcmp(type_sym->value(), "struct") == 0) {
 	 assert(false); // FINISHME
       } else {
diff --git a/ir_variable.cpp b/ir_variable.cpp
index fabd856..15a4a92 100644
--- a/ir_variable.cpp
+++ b/ir_variable.cpp
@@ -104,7 +104,7 @@ generate_110_uniforms(exec_list *instructions,
     * FINISHME: for now.
     */
    const glsl_type *const mat4_array_type =
-      glsl_type::get_array_instance(glsl_type::mat4_type, 4);
+      glsl_type::get_array_instance(symtab, glsl_type::mat4_type, 4);
 
    add_variable("gl_TextureMatrix", ir_var_uniform, -1, mat4_array_type,
 		instructions, symtab);
@@ -122,7 +122,8 @@ generate_110_uniforms(exec_list *instructions,
     * FINISHME: at least 8, so hard-code 8 for now.
     */
    const glsl_type *const light_source_array_type =
-      glsl_type::get_array_instance(symtab->get_type("gl_LightSourceParameters"), 8);
+      glsl_type::get_array_instance(symtab,
+				    symtab->get_type("gl_LightSourceParameters"), 8);
 
    add_variable("gl_LightSource", ir_var_uniform, -1, light_source_array_type,
 		instructions, symtab);
@@ -157,7 +158,7 @@ generate_110_vs_variables(exec_list *instructions,
     * FINISHME: for now.
     */
    const glsl_type *const vec4_array_type =
-      glsl_type::get_array_instance(glsl_type::vec4_type, 4);
+      glsl_type::get_array_instance(symtab, glsl_type::vec4_type, 4);
 
    add_variable("gl_TexCoord", ir_var_out, VERT_RESULT_TEX0, vec4_array_type,
 		instructions, symtab);
@@ -179,6 +180,7 @@ static void
 generate_130_vs_variables(exec_list *instructions,
 			  glsl_symbol_table *symtab)
 {
+   void *ctx = symtab;
    generate_120_vs_variables(instructions, symtab);
 
    for (unsigned i = 0; i < Elements(builtin_130_vs_variables); i++) {
@@ -190,7 +192,7 @@ generate_130_vs_variables(exec_list *instructions,
     * FINISHME: the value of GL_MAX_CLIP_DISTANCES.
     */
    const glsl_type *const clip_distance_array_type =
-      glsl_type::get_array_instance(glsl_type::float_type, 8);
+      glsl_type::get_array_instance(ctx, glsl_type::float_type, 8);
 
    /* FINISHME: gl_ClipDistance needs a real location assigned. */
    add_variable("gl_ClipDistance", ir_var_out, -1, clip_distance_array_type,
@@ -240,7 +242,7 @@ generate_110_fs_variables(exec_list *instructions,
     * FINISHME: for now.
     */
    const glsl_type *const vec4_array_type =
-      glsl_type::get_array_instance(glsl_type::vec4_type, 4);
+      glsl_type::get_array_instance(symtab, glsl_type::vec4_type, 4);
 
    add_variable("gl_TexCoord", ir_var_in, FRAG_ATTRIB_TEX0, vec4_array_type,
 		instructions, symtab);
@@ -256,7 +258,7 @@ generate_ARB_draw_buffers_fs_variables(exec_list *instructions,
     * FINISHME: at least 1, so hard-code 1 for now.
     */
    const glsl_type *const vec4_array_type =
-      glsl_type::get_array_instance(glsl_type::vec4_type, 1);
+      glsl_type::get_array_instance(symtab, glsl_type::vec4_type, 1);
 
    ir_variable *const fd =
       add_variable("gl_FragData", ir_var_out, FRAG_RESULT_DATA0,
@@ -279,13 +281,14 @@ static void
 generate_130_fs_variables(exec_list *instructions,
 			  glsl_symbol_table *symtab)
 {
+   void *ctx = symtab;
    generate_120_fs_variables(instructions, symtab);
 
    /* FINISHME: The size of this array is implementation dependent based on
     * FINISHME: the value of GL_MAX_CLIP_DISTANCES.
     */
    const glsl_type *const clip_distance_array_type =
-      glsl_type::get_array_instance(glsl_type::float_type, 8);
+      glsl_type::get_array_instance(ctx, glsl_type::float_type, 8);
 
    /* FINISHME: gl_ClipDistance needs a real location assigned. */
    add_variable("gl_ClipDistance", ir_var_in, -1, clip_distance_array_type,