diff options
| -rw-r--r-- | src/glsl/glsl_parser_extras.cpp | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/src/glsl/glsl_parser_extras.cpp b/src/glsl/glsl_parser_extras.cpp index e5c2dfee364..2d94d3554cd 100644 --- a/src/glsl/glsl_parser_extras.cpp +++ b/src/glsl/glsl_parser_extras.cpp @@ -1487,7 +1487,7 @@ _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader, if (shader->InfoLog) ralloc_free(shader->InfoLog); - shader->symbols = state->symbols; + shader->symbols = new(shader->ir) glsl_symbol_table; shader->CompileStatus = !state->error; shader->InfoLog = state->info_log; shader->Version = state->language_version; @@ -1500,6 +1500,30 @@ _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader, /* Retain any live IR, but trash the rest. */ reparent_ir(shader->ir, shader->ir); + /* Destroy the symbol table. Create a new symbol table that contains only + * the variables and functions that still exist in the IR. The symbol + * table will be used later during linking. + * + * There must NOT be any freed objects still referenced by the symbol + * table. That could cause the linker to dereference freed memory. + * + * We don't have to worry about types or interface-types here because those + * are fly-weights that are looked up by glsl_type. + */ + foreach_in_list (ir_instruction, ir, shader->ir) { + switch (ir->ir_type) { + case ir_type_function: + shader->symbols->add_function((ir_function *) ir); + break; + case ir_type_variable: + shader->symbols->add_variable((ir_variable *) ir); + break; + default: + break; + } + } + + delete state->symbols; ralloc_free(state); } |