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Merge pull request #89990 from dalexeev/gds-reset-uninit-local-vars

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GDScript: Fix uninitialized local variables not being reset
This commit is contained in:
Rémi Verschelde 2024-04-24 18:54:56 +02:00
commit 69a23e64e4
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GPG Key ID: C3336907360768E1
10 changed files with 190 additions and 73 deletions
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88
modules/gdscript/gdscript_byte_codegen.cpp
View File

@ -45,8 +45,8 @@ uint32_t GDScriptByteCodeGenerator::add_parameter(const StringName &p_name, bool
}
uint32_t GDScriptByteCodeGenerator::add_local(const StringName &p_name, const GDScriptDataType &p_type) {
int stack_pos = locals.size() + RESERVED_STACK;
locals.push_back(StackSlot(p_type.builtin_type));
int stack_pos = locals.size() + GDScriptFunction::FIXED_ADDRESSES_MAX;
locals.push_back(StackSlot(p_type.builtin_type, p_type.can_contain_object()));
add_stack_identifier(p_name, stack_pos);
return stack_pos;
}
@ -122,7 +122,7 @@ uint32_t GDScriptByteCodeGenerator::add_temporary(const GDScriptDataType &p_type
List<int> &pool = temporaries_pool[temp_type];
if (pool.is_empty()) {
StackSlot new_temp(temp_type);
StackSlot new_temp(temp_type, p_type.can_contain_object());
int idx = temporaries.size();
pool.push_back(idx);
temporaries.push_back(new_temp);
@ -136,15 +136,14 @@ uint32_t GDScriptByteCodeGenerator::add_temporary(const GDScriptDataType &p_type
void GDScriptByteCodeGenerator::pop_temporary() {
ERR_FAIL_COND(used_temporaries.is_empty());
int slot_idx = used_temporaries.back()->get();
const StackSlot &slot = temporaries[slot_idx];
if (slot.type == Variant::NIL) {
if (temporaries[slot_idx].can_contain_object) {
// Avoid keeping in the stack long-lived references to objects,
// which may prevent RefCounted objects from being freed.
// which may prevent `RefCounted` objects from being freed.
// However, the cleanup will be performed an the end of the
// statement, to allow object references to survive chaining.
temporaries_pending_clear.push_back(slot_idx);
temporaries_pending_clear.insert(slot_idx);
}
temporaries_pool[slot.type].push_back(slot_idx);
temporaries_pool[temporaries[slot_idx].type].push_back(slot_idx);
used_temporaries.pop_back();
}
@ -187,7 +186,7 @@ GDScriptFunction *GDScriptByteCodeGenerator::write_end() {
append_opcode(GDScriptFunction::OPCODE_END);
for (int i = 0; i < temporaries.size(); i++) {
int stack_index = i + max_locals + RESERVED_STACK;
int stack_index = i + max_locals + GDScriptFunction::FIXED_ADDRESSES_MAX;
for (int j = 0; j < temporaries[i].bytecode_indices.size(); j++) {
opcodes.write[temporaries[i].bytecode_indices[j]] = stack_index | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
}
@ -398,7 +397,7 @@ GDScriptFunction *GDScriptByteCodeGenerator::write_end() {
if (debug_stack) {
function->stack_debug = stack_debug;
}
function->_stack_size = RESERVED_STACK + max_locals + temporaries.size();
function->_stack_size = GDScriptFunction::FIXED_ADDRESSES_MAX + max_locals + temporaries.size();
function->_instruction_args_size = instr_args_max;
#ifdef DEBUG_ENABLED
@ -945,6 +944,11 @@ void GDScriptByteCodeGenerator::write_assign(const Address &p_target, const Addr
}
}
void GDScriptByteCodeGenerator::write_assign_null(const Address &p_target) {
append_opcode(GDScriptFunction::OPCODE_ASSIGN_NULL);
append(p_target);
}
void GDScriptByteCodeGenerator::write_assign_true(const Address &p_target) {
append_opcode(GDScriptFunction::OPCODE_ASSIGN_TRUE);
append(p_target);
@ -1579,9 +1583,8 @@ void GDScriptByteCodeGenerator::write_for(const Address &p_variable, bool p_use_
if (p_use_conversion) {
write_assign_with_conversion(p_variable, temp);
const GDScriptDataType &type = p_variable.type;
if (type.kind != GDScriptDataType::BUILTIN || type.builtin_type == Variant::ARRAY || type.builtin_type == Variant::DICTIONARY) {
write_assign_false(temp); // Can contain RefCounted, so clear it.
if (p_variable.type.can_contain_object()) {
clear_address(temp); // Can contain `RefCounted`, so clear it.
}
}
}
@ -1746,21 +1749,54 @@ void GDScriptByteCodeGenerator::end_block() {
pop_stack_identifiers();
}
void GDScriptByteCodeGenerator::clean_temporaries() {
List<int>::Element *E = temporaries_pending_clear.front();
while (E) {
// The temporary may have been re-used as something else than an object
// since it was added to the list. In that case, there's no need to clear it.
int slot_idx = E->get();
const StackSlot &slot = temporaries[slot_idx];
if (slot.type == Variant::NIL) {
write_assign_false(Address(Address::TEMPORARY, slot_idx));
void GDScriptByteCodeGenerator::clear_temporaries() {
for (int slot_idx : temporaries_pending_clear) {
// The temporary may have been re-used as something else since it was added to the list.
// In that case, there's **no** need to clear it.
if (temporaries[slot_idx].can_contain_object) {
clear_address(Address(Address::TEMPORARY, slot_idx)); // Can contain `RefCounted`, so clear it.
}
List<int>::Element *next = E->next();
E->erase();
E = next;
}
temporaries_pending_clear.clear();
}
void GDScriptByteCodeGenerator::clear_address(const Address &p_address) {
// Do not check `is_local_dirty()` here! Always clear the address since the codegen doesn't track the compiler.
// Also, this method is used to initialize local variables of built-in types, since they cannot be `null`.
if (p_address.type.has_type && p_address.type.kind == GDScriptDataType::BUILTIN) {
switch (p_address.type.builtin_type) {
case Variant::BOOL:
write_assign_false(p_address);
break;
case Variant::ARRAY:
if (p_address.type.has_container_element_type(0)) {
write_construct_typed_array(p_address, p_address.type.get_container_element_type(0), Vector<GDScriptCodeGenerator::Address>());
} else {
write_construct(p_address, p_address.type.builtin_type, Vector<GDScriptCodeGenerator::Address>());
}
break;
case Variant::NIL:
case Variant::OBJECT:
write_assign_null(p_address);
break;
default:
write_construct(p_address, p_address.type.builtin_type, Vector<GDScriptCodeGenerator::Address>());
break;
}
} else {
write_assign_null(p_address);
}
if (p_address.mode == Address::LOCAL_VARIABLE) {
dirty_locals.erase(p_address.address);
}
}
// Returns `true` if the local has been re-used and not cleaned up with `clear_address()`.
bool GDScriptByteCodeGenerator::is_local_dirty(const Address &p_address) const {
ERR_FAIL_COND_V(p_address.mode != Address::LOCAL_VARIABLE, false);
return dirty_locals.has(p_address.address);
}
GDScriptByteCodeGenerator::~GDScriptByteCodeGenerator() {

19
modules/gdscript/gdscript_byte_codegen.h
View File

@ -38,15 +38,14 @@
class GDScriptByteCodeGenerator : public GDScriptCodeGenerator {
struct StackSlot {
Variant::Type type = Variant::NIL;
bool can_contain_object = true;
Vector<int> bytecode_indices;
StackSlot() = default;
StackSlot(Variant::Type p_type) :
type(p_type) {}
StackSlot(Variant::Type p_type, bool p_can_contain_object) :
type(p_type), can_contain_object(p_can_contain_object) {}
};
const static int RESERVED_STACK = 3; // For self, class, and nil.
struct CallTarget {
Address target;
bool is_new_temporary = false;
@ -85,9 +84,11 @@ class GDScriptByteCodeGenerator : public GDScriptCodeGenerator {
RBMap<StringName, int> local_constants;
Vector<StackSlot> locals;
HashSet<int> dirty_locals;
Vector<StackSlot> temporaries;
List<int> used_temporaries;
List<int> temporaries_pending_clear;
HashSet<int> temporaries_pending_clear;
RBMap<Variant::Type, List<int>> temporaries_pool;
List<GDScriptFunction::StackDebug> stack_debug;
@ -193,6 +194,9 @@ class GDScriptByteCodeGenerator : public GDScriptCodeGenerator {
ERR_PRINT("Leaving block with non-zero temporary variables: " + itos(used_temporaries.size()));
}
#endif
for (int i = current_locals; i < locals.size(); i++) {
dirty_locals.insert(i + GDScriptFunction::FIXED_ADDRESSES_MAX);
}
locals.resize(current_locals);
if (debug_stack) {
for (const KeyValue<StringName, int> &E : block_identifiers) {
@ -455,7 +459,9 @@ public:
virtual uint32_t add_or_get_name(const StringName &p_name) override;
virtual uint32_t add_temporary(const GDScriptDataType &p_type) override;
virtual void pop_temporary() override;
virtual void clean_temporaries() override;
virtual void clear_temporaries() override;
virtual void clear_address(const Address &p_address) override;
virtual bool is_local_dirty(const Address &p_address) const override;
virtual void start_parameters() override;
virtual void end_parameters() override;
@ -496,6 +502,7 @@ public:
virtual void write_get_static_variable(const Address &p_target, const Address &p_class, int p_index) override;
virtual void write_assign(const Address &p_target, const Address &p_source) override;
virtual void write_assign_with_conversion(const Address &p_target, const Address &p_source) override;
virtual void write_assign_null(const Address &p_target) override;
virtual void write_assign_true(const Address &p_target) override;
virtual void write_assign_false(const Address &p_target) override;
virtual void write_assign_default_parameter(const Address &p_dst, const Address &p_src, bool p_use_conversion) override;

5
modules/gdscript/gdscript_codegen.h
View File

@ -73,7 +73,9 @@ public:
virtual uint32_t add_or_get_name(const StringName &p_name) = 0;
virtual uint32_t add_temporary(const GDScriptDataType &p_type) = 0;
virtual void pop_temporary() = 0;
virtual void clean_temporaries() = 0;
virtual void clear_temporaries() = 0;
virtual void clear_address(const Address &p_address) = 0;
virtual bool is_local_dirty(const Address &p_address) const = 0;
virtual void start_parameters() = 0;
virtual void end_parameters() = 0;
@ -114,6 +116,7 @@ public:
virtual void write_get_static_variable(const Address &p_target, const Address &p_class, int p_index) = 0;
virtual void write_assign(const Address &p_target, const Address &p_source) = 0;
virtual void write_assign_with_conversion(const Address &p_target, const Address &p_source) = 0;
virtual void write_assign_null(const Address &p_target) = 0;
virtual void write_assign_true(const Address &p_target) = 0;
virtual void write_assign_false(const Address &p_target) = 0;
virtual void write_assign_default_parameter(const Address &dst, const Address &src, bool p_use_conversion) = 0;

74
modules/gdscript/gdscript_compiler.cpp
View File

@ -1826,7 +1826,7 @@ GDScriptCodeGenerator::Address GDScriptCompiler::_parse_match_pattern(CodeGen &c
ERR_FAIL_V_MSG(p_previous_test, "Reaching the end of pattern compilation without matching a pattern.");
}
List<GDScriptCodeGenerator::Address> GDScriptCompiler::_add_locals_in_block(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block) {
List<GDScriptCodeGenerator::Address> GDScriptCompiler::_add_block_locals(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block) {
List<GDScriptCodeGenerator::Address> addresses;
for (int i = 0; i < p_block->locals.size(); i++) {
if (p_block->locals[i].type == GDScriptParser::SuiteNode::Local::PARAMETER || p_block->locals[i].type == GDScriptParser::SuiteNode::Local::FOR_VARIABLE) {
@ -1838,27 +1838,25 @@ List<GDScriptCodeGenerator::Address> GDScriptCompiler::_add_locals_in_block(Code
return addresses;
}
// Avoid keeping in the stack long-lived references to objects, which may prevent RefCounted objects from being freed.
void GDScriptCompiler::_clear_addresses(CodeGen &codegen, const List<GDScriptCodeGenerator::Address> &p_addresses) {
for (const List<GDScriptCodeGenerator::Address>::Element *E = p_addresses.front(); E; E = E->next()) {
GDScriptDataType type = E->get().type;
// If not an object and cannot contain an object, no need to clear.
if (type.kind != GDScriptDataType::BUILTIN || type.builtin_type == Variant::ARRAY || type.builtin_type == Variant::DICTIONARY) {
codegen.generator->write_assign_false(E->get());
// Avoid keeping in the stack long-lived references to objects, which may prevent `RefCounted` objects from being freed.
void GDScriptCompiler::_clear_block_locals(CodeGen &codegen, const List<GDScriptCodeGenerator::Address> &p_locals) {
for (const GDScriptCodeGenerator::Address &local : p_locals) {
if (local.type.can_contain_object()) {
codegen.generator->clear_address(local);
}
}
}
Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block, bool p_add_locals, bool p_reset_locals) {
Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block, bool p_add_locals, bool p_clear_locals) {
Error err = OK;
GDScriptCodeGenerator *gen = codegen.generator;
List<GDScriptCodeGenerator::Address> block_locals;
gen->clean_temporaries();
gen->clear_temporaries();
codegen.start_block();
if (p_add_locals) {
block_locals = _add_locals_in_block(codegen, p_block);
block_locals = _add_block_locals(codegen, p_block);
}
for (int i = 0; i < p_block->statements.size(); i++) {
@ -1873,7 +1871,7 @@ Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::Sui
case GDScriptParser::Node::MATCH: {
const GDScriptParser::MatchNode *match = static_cast<const GDScriptParser::MatchNode *>(s);
codegen.start_block();
codegen.start_block(); // Add an extra block, since the binding pattern and @special variables belong to the branch scope.
// Evaluate the match expression.
GDScriptCodeGenerator::Address value = codegen.add_local("@match_value", _gdtype_from_datatype(match->test->get_datatype(), codegen.script));
@ -1914,7 +1912,7 @@ Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::Sui
codegen.start_block(); // Create an extra block around for binds.
// Add locals in block before patterns, so temporaries don't use the stack address for binds.
List<GDScriptCodeGenerator::Address> branch_locals = _add_locals_in_block(codegen, branch->block);
List<GDScriptCodeGenerator::Address> branch_locals = _add_block_locals(codegen, branch->block);
#ifdef DEBUG_ENABLED
// Add a newline before each branch, since the debugger needs those.
@ -1961,7 +1959,7 @@ Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::Sui
return err;
}
_clear_addresses(codegen, branch_locals);
_clear_block_locals(codegen, branch_locals);
codegen.end_block(); // Get out of extra block.
}
@ -2003,7 +2001,8 @@ Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::Sui
case GDScriptParser::Node::FOR: {
const GDScriptParser::ForNode *for_n = static_cast<const GDScriptParser::ForNode *>(s);
codegen.start_block();
codegen.start_block(); // Add an extra block, since the iterator and @special variables belong to the loop scope.
GDScriptCodeGenerator::Address iterator = codegen.add_local(for_n->variable->name, _gdtype_from_datatype(for_n->variable->get_datatype(), codegen.script));
gen->start_for(iterator.type, _gdtype_from_datatype(for_n->list->get_datatype(), codegen.script));
@ -2021,14 +2020,21 @@ Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::Sui
gen->write_for(iterator, for_n->use_conversion_assign);
err = _parse_block(codegen, for_n->loop);
// Loop variables must be cleared even when `break`/`continue` is used.
List<GDScriptCodeGenerator::Address> loop_locals = _add_block_locals(codegen, for_n->loop);
//_clear_block_locals(codegen, loop_locals); // Inside loop, before block - for `continue`. // TODO
err = _parse_block(codegen, for_n->loop, false); // Don't add locals again.
if (err) {
return err;
}
gen->write_endfor();
codegen.end_block();
_clear_block_locals(codegen, loop_locals); // Outside loop, after block - for `break` and normal exit.
codegen.end_block(); // Get out of extra block.
} break;
case GDScriptParser::Node::WHILE: {
const GDScriptParser::WhileNode *while_n = static_cast<const GDScriptParser::WhileNode *>(s);
@ -2046,12 +2052,19 @@ Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::Sui
codegen.generator->pop_temporary();
}
err = _parse_block(codegen, while_n->loop);
// Loop variables must be cleared even when `break`/`continue` is used.
List<GDScriptCodeGenerator::Address> loop_locals = _add_block_locals(codegen, while_n->loop);
//_clear_block_locals(codegen, loop_locals); // Inside loop, before block - for `continue`. // TODO
err = _parse_block(codegen, while_n->loop, false); // Don't add locals again.
if (err) {
return err;
}
gen->write_endwhile();
_clear_block_locals(codegen, loop_locals); // Outside loop, after block - for `break` and normal exit.
} break;
case GDScriptParser::Node::BREAK: {
gen->write_break();
@ -2134,21 +2147,16 @@ Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::Sui
codegen.generator->pop_temporary();
}
initialized = true;
} else if (local_type.has_type) {
// Initialize with default for type.
if (local_type.has_container_element_type(0)) {
codegen.generator->write_construct_typed_array(local, local_type.get_container_element_type(0), Vector<GDScriptCodeGenerator::Address>());
initialized = true;
} else if (local_type.kind == GDScriptDataType::BUILTIN) {
codegen.generator->write_construct(local, local_type.builtin_type, Vector<GDScriptCodeGenerator::Address>());
initialized = true;
}
// The `else` branch is for objects, in such case we leave it as `null`.
} else if ((local_type.has_type && local_type.kind == GDScriptDataType::BUILTIN) || codegen.generator->is_local_dirty(local)) {
// Initialize with default for the type. Built-in types must always be cleared (they cannot be `null`).
// Objects and untyped variables are assigned to `null` only if the stack address has been re-used and not cleared.
codegen.generator->clear_address(local);
initialized = true;
}
// Assigns a null for the unassigned variables in loops.
// Don't check `is_local_dirty()` since the variable must be assigned to `null` **on each iteration**.
if (!initialized && p_block->is_in_loop) {
codegen.generator->write_construct(local, Variant::NIL, Vector<GDScriptCodeGenerator::Address>());
codegen.generator->clear_address(local);
}
} break;
case GDScriptParser::Node::CONSTANT: {
@ -2180,11 +2188,11 @@ Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::Sui
} break;
}
gen->clean_temporaries();
gen->clear_temporaries();
}
if (p_add_locals && p_reset_locals) {
_clear_addresses(codegen, block_locals);
if (p_add_locals && p_clear_locals) {
_clear_block_locals(codegen, block_locals);
}
codegen.end_block();

6
modules/gdscript/gdscript_compiler.h
View File

@ -153,9 +153,9 @@ class GDScriptCompiler {
GDScriptCodeGenerator::Address _parse_expression(CodeGen &codegen, Error &r_error, const GDScriptParser::ExpressionNode *p_expression, bool p_root = false, bool p_initializer = false);
GDScriptCodeGenerator::Address _parse_match_pattern(CodeGen &codegen, Error &r_error, const GDScriptParser::PatternNode *p_pattern, const GDScriptCodeGenerator::Address &p_value_addr, const GDScriptCodeGenerator::Address &p_type_addr, const GDScriptCodeGenerator::Address &p_previous_test, bool p_is_first, bool p_is_nested);
List<GDScriptCodeGenerator::Address> _add_locals_in_block(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block);
void _clear_addresses(CodeGen &codegen, const List<GDScriptCodeGenerator::Address> &p_addresses);
Error _parse_block(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block, bool p_add_locals = true, bool p_reset_locals = true);
List<GDScriptCodeGenerator::Address> _add_block_locals(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block);
void _clear_block_locals(CodeGen &codegen, const List<GDScriptCodeGenerator::Address> &p_locals);
Error _parse_block(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block, bool p_add_locals = true, bool p_clear_locals = true);
GDScriptFunction *_parse_function(Error &r_error, GDScript *p_script, const GDScriptParser::ClassNode *p_class, const GDScriptParser::FunctionNode *p_func, bool p_for_ready = false, bool p_for_lambda = false);
GDScriptFunction *_make_static_initializer(Error &r_error, GDScript *p_script, const GDScriptParser::ClassNode *p_class);
Error _parse_setter_getter(GDScript *p_script, const GDScriptParser::ClassNode *p_class, const GDScriptParser::VariableNode *p_variable, bool p_is_setter);

7
modules/gdscript/gdscript_disassembler.cpp
View File

@ -360,6 +360,13 @@ void GDScriptFunction::disassemble(const Vector<String> &p_code_lines) const {
incr += 3;
} break;
case OPCODE_ASSIGN_NULL: {
text += "assign ";
text += DADDR(1);
text += " = null";
incr += 2;
} break;
case OPCODE_ASSIGN_TRUE: {
text += "assign ";
text += DADDR(1);

28
modules/gdscript/gdscript_function.h
View File

@ -78,17 +78,17 @@ public:
if (valid && builtin_type == Variant::ARRAY && has_container_element_type(0)) {
Array array = p_variant;
if (array.is_typed()) {
GDScriptDataType array_container_type = get_container_element_type(0);
const GDScriptDataType &elem_type = container_element_types[0];
Variant::Type array_builtin_type = (Variant::Type)array.get_typed_builtin();
StringName array_native_type = array.get_typed_class_name();
Ref<Script> array_script_type_ref = array.get_typed_script();
if (array_script_type_ref.is_valid()) {
valid = (array_container_type.kind == SCRIPT || array_container_type.kind == GDSCRIPT) && array_container_type.script_type == array_script_type_ref.ptr();
valid = (elem_type.kind == SCRIPT || elem_type.kind == GDSCRIPT) && elem_type.script_type == array_script_type_ref.ptr();
} else if (array_native_type != StringName()) {
valid = array_container_type.kind == NATIVE && array_container_type.native_type == array_native_type;
valid = elem_type.kind == NATIVE && elem_type.native_type == array_native_type;
} else {
valid = array_container_type.kind == BUILTIN && array_container_type.builtin_type == array_builtin_type;
valid = elem_type.kind == BUILTIN && elem_type.builtin_type == array_builtin_type;
}
} else {
valid = false;
@ -147,6 +147,25 @@ public:
return false;
}
bool can_contain_object() const {
if (has_type && kind == BUILTIN) {
switch (builtin_type) {
case Variant::ARRAY:
if (has_container_element_type(0)) {
return container_element_types[0].can_contain_object();
}
return true;
case Variant::DICTIONARY:
case Variant::NIL:
case Variant::OBJECT:
return true;
default:
return false;
}
}
return true;
}
void set_container_element_type(int p_index, const GDScriptDataType &p_element_type) {
ERR_FAIL_COND(p_index < 0);
while (p_index >= container_element_types.size()) {
@ -218,6 +237,7 @@ public:
OPCODE_SET_STATIC_VARIABLE, // Only for GDScript.
OPCODE_GET_STATIC_VARIABLE, // Only for GDScript.
OPCODE_ASSIGN,
OPCODE_ASSIGN_NULL,
OPCODE_ASSIGN_TRUE,
OPCODE_ASSIGN_FALSE,
OPCODE_ASSIGN_TYPED_BUILTIN,

11
modules/gdscript/gdscript_vm.cpp
View File

@ -234,6 +234,7 @@ void (*type_init_function_table[])(Variant *) = {
&&OPCODE_SET_STATIC_VARIABLE, \
&&OPCODE_GET_STATIC_VARIABLE, \
&&OPCODE_ASSIGN, \
&&OPCODE_ASSIGN_NULL, \
&&OPCODE_ASSIGN_TRUE, \
&&OPCODE_ASSIGN_FALSE, \
&&OPCODE_ASSIGN_TYPED_BUILTIN, \
@ -1256,6 +1257,16 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
}
DISPATCH_OPCODE;
OPCODE(OPCODE_ASSIGN_NULL) {
CHECK_SPACE(2);
GET_VARIANT_PTR(dst, 0);
*dst = Variant();
ip += 2;
}
DISPATCH_OPCODE;
OPCODE(OPCODE_ASSIGN_TRUE) {
CHECK_SPACE(2);
GET_VARIANT_PTR(dst, 0);

21
modules/gdscript/tests/scripts/runtime/features/reset_uninit_local_vars.gd Normal file
View File

@ -0,0 +1,21 @@
# GH-89958
func test():
if true:
@warning_ignore("unused_variable")
var a = 1
@warning_ignore("unused_variable")
var b := 1
@warning_ignore("unused_variable")
var c := 1
if true:
@warning_ignore("unassigned_variable")
var a
print(a)
@warning_ignore("unassigned_variable")
var b
print(b)
@warning_ignore("unassigned_variable")
var c: Object
print(c)

4
modules/gdscript/tests/scripts/runtime/features/reset_uninit_local_vars.out Normal file
View File

@ -0,0 +1,4 @@
GDTEST_OK
<null>
<null>
<null>