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Prevent shader crash if invalid builtin used after array member accessor

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(cherry picked from commit 3a70566b15)
This commit is contained in:
Yuri Roubinsky
2020-02-07 14:50:11 +03:00
committed by Rémi Verschelde
parent 388adac947
commit 3b2490f19c
2 changed files with 34 additions and 12 deletions
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34
servers/visual/shader_language.cpp
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@@ -2986,14 +2986,32 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
bool is_const = false;
int array_size = 0;
if (!_find_identifier(p_block, p_builtin_types, identifier, &data_type, &ident_type, &is_const, &array_size)) {
_set_error("Unknown identifier in expression: " + String(identifier));
return NULL;
}
if (p_block && p_block->block_tag != SubClassTag::TAG_GLOBAL) {
int idx = 0;
bool found = false;
if (ident_type == IDENTIFIER_FUNCTION) {
_set_error("Can't use function as identifier: " + String(identifier));
return NULL;
while (builtin_func_defs[idx].name) {
if (builtin_func_defs[idx].tag == p_block->block_tag && builtin_func_defs[idx].name == identifier) {
found = true;
break;
}
idx++;
}
if (!found) {
_set_error("Unknown identifier in expression: " + String(identifier));
return NULL;
}
} else {
if (!_find_identifier(p_block, p_builtin_types, identifier, &data_type, &ident_type, &is_const, &array_size)) {
_set_error("Unknown identifier in expression: " + String(identifier));
return NULL;
}
if (ident_type == IDENTIFIER_FUNCTION) {
_set_error("Can't use function as identifier: " + String(identifier));
return NULL;
}
}
Node *index_expression = NULL;
@@ -3009,7 +3027,9 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
if (tk.type == TK_PERIOD) {
completion_class = TAG_ARRAY;
p_block->block_tag = SubClassTag::TAG_ARRAY;
call_expression = _parse_and_reduce_expression(p_block, p_builtin_types);
p_block->block_tag = SubClassTag::TAG_GLOBAL;
if (!call_expression)
return NULL;
data_type = call_expression->get_datatype();