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godot/modules/gdscript/gd_function.cpp
Hein-Pieter van Braam 8064fbb174 Fix a crash in gdscript callbacks 
This fixes a crash running the 'goltorus' project.
2017-08-27 23:49:13 +02:00

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/*************************************************************************/
/* gd_function.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* 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, sublicense, 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 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 NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 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. */
/*************************************************************************/
#include "gd_function.h"
#include "gd_functions.h"
#include "gd_script.h"
#include "os/os.h"
Variant *GDFunction::_get_variant(int p_address, GDInstance *p_instance, GDScript *p_script, Variant &self, Variant *p_stack, String &r_error) const {
int address = p_address & ADDR_MASK;
//sequential table (jump table generated by compiler)
switch ((p_address & ADDR_TYPE_MASK) >> ADDR_BITS) {
case ADDR_TYPE_SELF: {
if (!p_instance) {
r_error = "Cannot access self without instance.";
return NULL;
}
return &self;
} break;
case ADDR_TYPE_CLASS: {
return &p_script->_static_ref;
} break;
case ADDR_TYPE_MEMBER: {
//member indexing is O(1)
if (!p_instance) {
r_error = "Cannot access member without instance.";
return NULL;
}
return &p_instance->members[address];
} break;
case ADDR_TYPE_CLASS_CONSTANT: {
//todo change to index!
GDScript *o = p_script;
ERR_FAIL_INDEX_V(address, _global_names_count, NULL);
const StringName *sn = &_global_names_ptr[address];
while (o) {
GDScript *s = o;
while (s) {
Map<StringName, Variant>::Element *E = s->constants.find(*sn);
if (E) {
return &E->get();
}
s = s->_base;
}
o = o->_owner;
}
ERR_EXPLAIN("GDCompiler bug..");
ERR_FAIL_V(NULL);
} break;
case ADDR_TYPE_LOCAL_CONSTANT: {
ERR_FAIL_INDEX_V(address, _constant_count, NULL);
return &_constants_ptr[address];
} break;
case ADDR_TYPE_STACK:
case ADDR_TYPE_STACK_VARIABLE: {
ERR_FAIL_INDEX_V(address, _stack_size, NULL);
return &p_stack[address];
} break;
case ADDR_TYPE_GLOBAL: {
ERR_FAIL_INDEX_V(address, GDScriptLanguage::get_singleton()->get_global_array_size(), NULL);
return &GDScriptLanguage::get_singleton()->get_global_array()[address];
} break;
case ADDR_TYPE_NIL: {
return &nil;
} break;
}
ERR_EXPLAIN("Bad Code! (Addressing Mode)");
ERR_FAIL_V(NULL);
return NULL;
}
String GDFunction::_get_call_error(const Variant::CallError &p_err, const String &p_where, const Variant **argptrs) const {
String err_text;
if (p_err.error == Variant::CallError::CALL_ERROR_INVALID_ARGUMENT) {
int errorarg = p_err.argument;
err_text = "Invalid type in " + p_where + ". Cannot convert argument " + itos(errorarg + 1) + " from " + Variant::get_type_name(argptrs[errorarg]->get_type()) + " to " + Variant::get_type_name(p_err.expected) + ".";
} else if (p_err.error == Variant::CallError::CALL_ERROR_TOO_MANY_ARGUMENTS) {
err_text = "Invalid call to " + p_where + ". Expected " + itos(p_err.argument) + " arguments.";
} else if (p_err.error == Variant::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS) {
err_text = "Invalid call to " + p_where + ". Expected " + itos(p_err.argument) + " arguments.";
} else if (p_err.error == Variant::CallError::CALL_ERROR_INVALID_METHOD) {
err_text = "Invalid call. Nonexistent " + p_where + ".";
} else if (p_err.error == Variant::CallError::CALL_ERROR_INSTANCE_IS_NULL) {
err_text = "Attempt to call " + p_where + " on a null instance.";
} else {
err_text = "Bug, call error: #" + itos(p_err.error);
}
return err_text;
}
static String _get_var_type(const Variant *p_type) {
String basestr;
if (p_type->get_type() == Variant::OBJECT) {
Object *bobj = *p_type;
if (!bobj) {
basestr = "null instance";
} else {
#ifdef DEBUG_ENABLED
if (ObjectDB::instance_validate(bobj)) {
if (bobj->get_script_instance())
basestr = bobj->get_class() + " (" + bobj->get_script_instance()->get_script()->get_path().get_file() + ")";
else
basestr = bobj->get_class();
} else {
basestr = "previously freed instance";
}
#else
basestr = "Object";
#endif
}
} else {
basestr = Variant::get_type_name(p_type->get_type());
}
return basestr;
}
Variant GDFunction::call(GDInstance *p_instance, const Variant **p_args, int p_argcount, Variant::CallError &r_err, CallState *p_state) {
if (!_code_ptr) {
return Variant();
}
r_err.error = Variant::CallError::CALL_OK;
Variant self;
Variant retvalue;
Variant *stack = NULL;
Variant **call_args;
int defarg = 0;
#ifdef DEBUG_ENABLED
//GDScriptLanguage::get_singleton()->calls++;
#endif
uint32_t alloca_size = 0;
GDScript *_class;
int ip = 0;
int line = _initial_line;
if (p_state) {
//use existing (supplied) state (yielded)
stack = (Variant *)p_state->stack.ptr();
call_args = (Variant **)&p_state->stack.ptr()[sizeof(Variant) * p_state->stack_size]; //ptr() to avoid bounds check
line = p_state->line;
ip = p_state->ip;
alloca_size = p_state->stack.size();
_class = p_state->_class;
p_instance = p_state->instance;
defarg = p_state->defarg;
self = p_state->self;
//stack[p_state->result_pos]=p_state->result; //assign stack with result
} else {
if (p_argcount != _argument_count) {
if (p_argcount > _argument_count) {
r_err.error = Variant::CallError::CALL_ERROR_TOO_MANY_ARGUMENTS;
r_err.argument = _argument_count;
return Variant();
} else if (p_argcount < _argument_count - _default_arg_count) {
r_err.error = Variant::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS;
r_err.argument = _argument_count - _default_arg_count;
return Variant();
} else {
defarg = _argument_count - p_argcount;
}
}
alloca_size = sizeof(Variant *) * _call_size + sizeof(Variant) * _stack_size;
if (alloca_size) {
uint8_t *aptr = (uint8_t *)alloca(alloca_size);
if (_stack_size) {
stack = (Variant *)aptr;
for (int i = 0; i < p_argcount; i++)
memnew_placement(&stack[i], Variant(*p_args[i]));
for (int i = p_argcount; i < _stack_size; i++)
memnew_placement(&stack[i], Variant);
} else {
stack = NULL;
}
if (_call_size) {
call_args = (Variant **)&aptr[sizeof(Variant) * _stack_size];
} else {
call_args = NULL;
}
} else {
stack = NULL;
call_args = NULL;
}
if (p_instance) {
if (p_instance->base_ref && static_cast<Reference *>(p_instance->owner)->is_referenced()) {
self = REF(static_cast<Reference *>(p_instance->owner));
} else {
self = p_instance->owner;
}
_class = p_instance->script.ptr();
} else {
_class = _script;
}
}
String err_text;
#ifdef DEBUG_ENABLED
if (ScriptDebugger::get_singleton())
GDScriptLanguage::get_singleton()->enter_function(p_instance, this, stack, &ip, &line);
#define CHECK_SPACE(m_space) \
ERR_BREAK((ip + m_space) > _code_size)
#define GET_VARIANT_PTR(m_v, m_code_ofs) \
Variant *m_v; \
m_v = _get_variant(_code_ptr[ip + m_code_ofs], p_instance, _class, self, stack, err_text); \
if (!m_v) \
break;
#else
#define CHECK_SPACE(m_space)
#define GET_VARIANT_PTR(m_v, m_code_ofs) \
Variant *m_v; \
m_v = _get_variant(_code_ptr[ip + m_code_ofs], p_instance, _class, self, stack, err_text);
#endif
#ifdef DEBUG_ENABLED
uint64_t function_start_time;
uint64_t function_call_time;
if (GDScriptLanguage::get_singleton()->profiling) {
function_start_time = OS::get_singleton()->get_ticks_usec();
function_call_time = 0;
profile.call_count++;
profile.frame_call_count++;
}
#endif
bool exit_ok = false;
while (ip < _code_size) {
int last_opcode = _code_ptr[ip];
switch (_code_ptr[ip]) {
case OPCODE_OPERATOR: {
CHECK_SPACE(5);
bool valid;
Variant::Operator op = (Variant::Operator)_code_ptr[ip + 1];
ERR_BREAK(op >= Variant::OP_MAX);
GET_VARIANT_PTR(a, 2);
GET_VARIANT_PTR(b, 3);
GET_VARIANT_PTR(dst, 4);
#ifdef DEBUG_ENABLED
Variant ret;
Variant::evaluate(op, *a, *b, ret, valid);
#else
Variant::evaluate(op, *a, *b, *dst, valid);
#endif
if (!valid) {
#ifdef DEBUG_ENABLED
if (ret.get_type() == Variant::STRING) {
//return a string when invalid with the error
err_text = ret;
err_text += " in operator '" + Variant::get_operator_name(op) + "'.";
} else {
err_text = "Invalid operands '" + Variant::get_type_name(a->get_type()) + "' and '" + Variant::get_type_name(b->get_type()) + "' in operator '" + Variant::get_operator_name(op) + "'.";
}
#endif
break;
}
#ifdef DEBUG_ENABLED
*dst = ret;
#endif
ip += 5;
continue;
}
case OPCODE_EXTENDS_TEST: {
CHECK_SPACE(4);
GET_VARIANT_PTR(a, 1);
GET_VARIANT_PTR(b, 2);
GET_VARIANT_PTR(dst, 3);
#ifdef DEBUG_ENABLED
if (a->get_type() != Variant::OBJECT || a->operator Object *() == NULL) {
err_text = "Left operand of 'is' is not an instance of anything.";
break;
}
if (b->get_type() != Variant::OBJECT || b->operator Object *() == NULL) {
err_text = "Right operand of 'is' is not a class.";
break;
}
#endif
Object *obj_A = *a;
Object *obj_B = *b;
GDScript *scr_B = Object::cast_to<GDScript>(obj_B);
bool extends_ok = false;
if (scr_B) {
//if B is a script, the only valid condition is that A has an instance which inherits from the script
//in other situation, this shoul return false.
if (obj_A->get_script_instance() && obj_A->get_script_instance()->get_language() == GDScriptLanguage::get_singleton()) {
GDScript *cmp = static_cast<GDScript *>(obj_A->get_script_instance()->get_script().ptr());
//bool found=false;
while (cmp) {
if (cmp == scr_B) {
//inherits from script, all ok
extends_ok = true;
break;
}
cmp = cmp->_base;
}
}
} else {
GDNativeClass *nc = Object::cast_to<GDNativeClass>(obj_B);
if (!nc) {
err_text = "Right operand of 'is' is not a class (type: '" + obj_B->get_class() + "').";
break;
}
extends_ok = ClassDB::is_parent_class(obj_A->get_class_name(), nc->get_name());
}
*dst = extends_ok;
ip += 4;
continue;
}
case OPCODE_SET: {
CHECK_SPACE(3);
GET_VARIANT_PTR(dst, 1);
GET_VARIANT_PTR(index, 2);
GET_VARIANT_PTR(value, 3);
bool valid;
dst->set(*index, *value, &valid);
if (!valid) {
String v = index->operator String();
if (v != "") {
v = "'" + v + "'";
} else {
v = "of type '" + _get_var_type(index) + "'";
}
err_text = "Invalid set index " + v + " (on base: '" + _get_var_type(dst) + "').";
break;
}
ip += 4;
continue;
}
case OPCODE_GET: {
CHECK_SPACE(3);
GET_VARIANT_PTR(src, 1);
GET_VARIANT_PTR(index, 2);
GET_VARIANT_PTR(dst, 3);
bool valid;
#ifdef DEBUG_ENABLED
//allow better error message in cases where src and dst are the same stack position
Variant ret = src->get(*index, &valid);
#else
*dst = src->get(*index, &valid);
#endif
if (!valid) {
String v = index->operator String();
if (v != "") {
v = "'" + v + "'";
} else {
v = "of type '" + _get_var_type(index) + "'";
}
err_text = "Invalid get index " + v + " (on base: '" + _get_var_type(src) + "').";
break;
}
#ifdef DEBUG_ENABLED
*dst = ret;
#endif
ip += 4;
continue;
}
case OPCODE_SET_NAMED: {
CHECK_SPACE(3);
GET_VARIANT_PTR(dst, 1);
GET_VARIANT_PTR(value, 3);
int indexname = _code_ptr[ip + 2];
ERR_BREAK(indexname < 0 || indexname >= _global_names_count);
const StringName *index = &_global_names_ptr[indexname];
bool valid;
dst->set_named(*index, *value, &valid);
if (!valid) {
String err_type;
err_text = "Invalid set index '" + String(*index) + "' (on base: '" + _get_var_type(dst) + "').";
break;
}
ip += 4;
continue;
}
case OPCODE_GET_NAMED: {
CHECK_SPACE(4);
GET_VARIANT_PTR(src, 1);
GET_VARIANT_PTR(dst, 3);
int indexname = _code_ptr[ip + 2];
ERR_BREAK(indexname < 0 || indexname >= _global_names_count);
const StringName *index = &_global_names_ptr[indexname];
bool valid;
#ifdef DEBUG_ENABLED
//allow better error message in cases where src and dst are the same stack position
Variant ret = src->get_named(*index, &valid);
#else
*dst = src->get_named(*index, &valid);
#endif
if (!valid) {
if (src->has_method(*index)) {
err_text = "Invalid get index '" + index->operator String() + "' (on base: '" + _get_var_type(src) + "'). Did you mean '." + index->operator String() + "()' ?";
} else {
err_text = "Invalid get index '" + index->operator String() + "' (on base: '" + _get_var_type(src) + "').";
}
break;
}
#ifdef DEBUG_ENABLED
*dst = ret;
#endif
ip += 4;
continue;
}
case OPCODE_SET_MEMBER: {
CHECK_SPACE(3);
int indexname = _code_ptr[ip + 1];
ERR_BREAK(indexname < 0 || indexname >= _global_names_count);
const StringName *index = &_global_names_ptr[indexname];
GET_VARIANT_PTR(src, 2);
bool valid;
bool ok = ClassDB::set_property(p_instance->owner, *index, *src, &valid);
#ifdef DEBUG_ENABLED
if (!ok) {
err_text = "Internal error setting property: " + String(*index);
break;
} else if (!valid) {
err_text = "Error setting property '" + String(*index) + "' with value of type " + Variant::get_type_name(src->get_type()) + ".";
break;
}
#endif
ip += 3;
continue;
}
case OPCODE_GET_MEMBER: {
CHECK_SPACE(3);
int indexname = _code_ptr[ip + 1];
ERR_BREAK(indexname < 0 || indexname >= _global_names_count);
const StringName *index = &_global_names_ptr[indexname];
GET_VARIANT_PTR(dst, 2);
bool ok = ClassDB::get_property(p_instance->owner, *index, *dst);
#ifdef DEBUG_ENABLED
if (!ok) {
err_text = "Internal error getting property: " + String(*index);
break;
}
#endif
ip += 3;
continue;
}
case OPCODE_ASSIGN: {
CHECK_SPACE(3);
GET_VARIANT_PTR(dst, 1);
GET_VARIANT_PTR(src, 2);
*dst = *src;
ip += 3;
continue;
}
case OPCODE_ASSIGN_TRUE: {
CHECK_SPACE(2);
GET_VARIANT_PTR(dst, 1);
*dst = true;
ip += 2;
continue;
}
case OPCODE_ASSIGN_FALSE: {
CHECK_SPACE(2);
GET_VARIANT_PTR(dst, 1);
*dst = false;
ip += 2;
continue;
}
case OPCODE_CONSTRUCT: {
CHECK_SPACE(2);
Variant::Type t = Variant::Type(_code_ptr[ip + 1]);
int argc = _code_ptr[ip + 2];
CHECK_SPACE(argc + 2);
Variant **argptrs = call_args;
for (int i = 0; i < argc; i++) {
GET_VARIANT_PTR(v, 3 + i);
argptrs[i] = v;
}
GET_VARIANT_PTR(dst, 3 + argc);
Variant::CallError err;
*dst = Variant::construct(t, (const Variant **)argptrs, argc, err);
if (err.error != Variant::CallError::CALL_OK) {
err_text = _get_call_error(err, "'" + Variant::get_type_name(t) + "' constructor", (const Variant **)argptrs);
break;
}
ip += 4 + argc;
//construct a basic type
continue;
}
case OPCODE_CONSTRUCT_ARRAY: {
CHECK_SPACE(1);
int argc = _code_ptr[ip + 1];
Array array; //arrays are always shared
array.resize(argc);
CHECK_SPACE(argc + 2);
for (int i = 0; i < argc; i++) {
GET_VARIANT_PTR(v, 2 + i);
array[i] = *v;
}
GET_VARIANT_PTR(dst, 2 + argc);
*dst = array;
ip += 3 + argc;
continue;
}
case OPCODE_CONSTRUCT_DICTIONARY: {
CHECK_SPACE(1);
int argc = _code_ptr[ip + 1];
Dictionary dict; //arrays are always shared
CHECK_SPACE(argc * 2 + 2);
for (int i = 0; i < argc; i++) {
GET_VARIANT_PTR(k, 2 + i * 2 + 0);
GET_VARIANT_PTR(v, 2 + i * 2 + 1);
dict[*k] = *v;
}
GET_VARIANT_PTR(dst, 2 + argc * 2);
*dst = dict;
ip += 3 + argc * 2;
continue;
}
case OPCODE_CALL_RETURN:
case OPCODE_CALL: {
CHECK_SPACE(4);
bool call_ret = _code_ptr[ip] == OPCODE_CALL_RETURN;
int argc = _code_ptr[ip + 1];
GET_VARIANT_PTR(base, 2);
int nameg = _code_ptr[ip + 3];
ERR_BREAK(nameg < 0 || nameg >= _global_names_count);
const StringName *methodname = &_global_names_ptr[nameg];
ERR_BREAK(argc < 0);
ip += 4;
CHECK_SPACE(argc + 1);
Variant **argptrs = call_args;
for (int i = 0; i < argc; i++) {
GET_VARIANT_PTR(v, i);
argptrs[i] = v;
}
#ifdef DEBUG_ENABLED
uint64_t call_time;
if (GDScriptLanguage::get_singleton()->profiling) {
call_time = OS::get_singleton()->get_ticks_usec();
}
#endif
Variant::CallError err;
if (call_ret) {
GET_VARIANT_PTR(ret, argc);
base->call_ptr(*methodname, (const Variant **)argptrs, argc, ret, err);
} else {
base->call_ptr(*methodname, (const Variant **)argptrs, argc, NULL, err);
}
#ifdef DEBUG_ENABLED
if (GDScriptLanguage::get_singleton()->profiling) {
function_call_time += OS::get_singleton()->get_ticks_usec() - call_time;
}
#endif
if (err.error != Variant::CallError::CALL_OK) {
String methodstr = *methodname;
String basestr = _get_var_type(base);
if (methodstr == "call") {
if (argc >= 1) {
methodstr = String(*argptrs[0]) + " (via call)";
if (err.error == Variant::CallError::CALL_ERROR_INVALID_ARGUMENT) {
err.argument -= 1;
}
}
} else if (methodstr == "free") {
if (err.error == Variant::CallError::CALL_ERROR_INVALID_METHOD) {
if (base->is_ref()) {
err_text = "Attempted to free a reference.";
break;
} else if (base->get_type() == Variant::OBJECT) {
err_text = "Attempted to free a locked object (calling or emitting).";
break;
}
}
}
err_text = _get_call_error(err, "function '" + methodstr + "' in base '" + basestr + "'", (const Variant **)argptrs);
break;
}
//_call_func(NULL,base,*methodname,ip,argc,p_instance,stack);
ip += argc + 1;
continue;
}
case OPCODE_CALL_BUILT_IN: {
CHECK_SPACE(4);
GDFunctions::Function func = GDFunctions::Function(_code_ptr[ip + 1]);
int argc = _code_ptr[ip + 2];
ERR_BREAK(argc < 0);
ip += 3;
CHECK_SPACE(argc + 1);
Variant **argptrs = call_args;
for (int i = 0; i < argc; i++) {
GET_VARIANT_PTR(v, i);
argptrs[i] = v;
}
GET_VARIANT_PTR(dst, argc);
Variant::CallError err;
GDFunctions::call(func, (const Variant **)argptrs, argc, *dst, err);
if (err.error != Variant::CallError::CALL_OK) {
String methodstr = GDFunctions::get_func_name(func);
if (dst->get_type() == Variant::STRING) {
//call provided error string
err_text = "Error calling built-in function '" + methodstr + "': " + String(*dst);
} else {
err_text = _get_call_error(err, "built-in function '" + methodstr + "'", (const Variant **)argptrs);
}
break;
}
ip += argc + 1;
continue;
}
case OPCODE_CALL_SELF: {
break;
}
case OPCODE_CALL_SELF_BASE: {
CHECK_SPACE(2);
int self_fun = _code_ptr[ip + 1];
#ifdef DEBUG_ENABLED
if (self_fun < 0 || self_fun >= _global_names_count) {
err_text = "compiler bug, function name not found";
break;
}
#endif
const StringName *methodname = &_global_names_ptr[self_fun];
int argc = _code_ptr[ip + 2];
CHECK_SPACE(2 + argc + 1);
Variant **argptrs = call_args;
for (int i = 0; i < argc; i++) {
GET_VARIANT_PTR(v, i + 3);
argptrs[i] = v;
}
GET_VARIANT_PTR(dst, argc + 3);
const GDScript *gds = _script;
const Map<StringName, GDFunction *>::Element *E = NULL;
while (gds->base.ptr()) {
gds = gds->base.ptr();
E = gds->member_functions.find(*methodname);
if (E)
break;
}
Variant::CallError err;
if (E) {
*dst = E->get()->call(p_instance, (const Variant **)argptrs, argc, err);
} else if (gds->native.ptr()) {
if (*methodname != GDScriptLanguage::get_singleton()->strings._init) {
MethodBind *mb = ClassDB::get_method(gds->native->get_name(), *methodname);
if (!mb) {
err.error = Variant::CallError::CALL_ERROR_INVALID_METHOD;
} else {
*dst = mb->call(p_instance->owner, (const Variant **)argptrs, argc, err);
}
} else {
err.error = Variant::CallError::CALL_OK;
}
} else {
if (*methodname != GDScriptLanguage::get_singleton()->strings._init) {
err.error = Variant::CallError::CALL_ERROR_INVALID_METHOD;
} else {
err.error = Variant::CallError::CALL_OK;
}
}
if (err.error != Variant::CallError::CALL_OK) {
String methodstr = *methodname;
err_text = _get_call_error(err, "function '" + methodstr + "'", (const Variant **)argptrs);
break;
}
ip += 4 + argc;
continue;
}
case OPCODE_YIELD:
case OPCODE_YIELD_SIGNAL: {
int ipofs = 1;
if (_code_ptr[ip] == OPCODE_YIELD_SIGNAL) {
CHECK_SPACE(4);
ipofs += 2;
} else {
CHECK_SPACE(2);
}
Ref<GDFunctionState> gdfs = memnew(GDFunctionState);
gdfs->function = this;
gdfs->state.stack.resize(alloca_size);
//copy variant stack
for (int i = 0; i < _stack_size; i++) {
memnew_placement(&gdfs->state.stack[sizeof(Variant) * i], Variant(stack[i]));
}
gdfs->state.stack_size = _stack_size;
gdfs->state.self = self;
gdfs->state.alloca_size = alloca_size;
gdfs->state._class = _class;
gdfs->state.ip = ip + ipofs;
gdfs->state.line = line;
gdfs->state.instance_id = (p_instance && p_instance->get_owner()) ? p_instance->get_owner()->get_instance_id() : 0;
gdfs->state.script_id = _class->get_instance_id();
//gdfs->state.result_pos=ip+ipofs-1;
gdfs->state.defarg = defarg;
gdfs->state.instance = p_instance;
gdfs->function = this;
retvalue = gdfs;
if (_code_ptr[ip] == OPCODE_YIELD_SIGNAL) {
GET_VARIANT_PTR(argobj, 1);
GET_VARIANT_PTR(argname, 2);
//do the oneshot connect
if (argobj->get_type() != Variant::OBJECT) {
err_text = "First argument of yield() not of type object.";
break;
}
if (argname->get_type() != Variant::STRING) {
err_text = "Second argument of yield() not a string (for signal name).";
break;
}
Object *obj = argobj->operator Object *();
String signal = argname->operator String();
#ifdef DEBUG_ENABLED
if (!obj) {
err_text = "First argument of yield() is null.";
break;
}
if (ScriptDebugger::get_singleton()) {
if (!ObjectDB::instance_validate(obj)) {
err_text = "First argument of yield() is a previously freed instance.";
break;
}
}
if (signal.length() == 0) {
err_text = "Second argument of yield() is an empty string (for signal name).";
break;
}
#endif
Error err = obj->connect(signal, gdfs.ptr(), "_signal_callback", varray(gdfs), Object::CONNECT_ONESHOT);
if (err != OK) {
err_text = "Error connecting to signal: " + signal + " during yield().";
break;
}
}
exit_ok = true;
break;
}
case OPCODE_YIELD_RESUME: {
CHECK_SPACE(2);
if (!p_state) {
err_text = ("Invalid Resume (bug?)");
break;
}
GET_VARIANT_PTR(result, 1);
*result = p_state->result;
ip += 2;
continue;
}
case OPCODE_JUMP: {
CHECK_SPACE(2);
int to = _code_ptr[ip + 1];
ERR_BREAK(to < 0 || to > _code_size);
ip = to;
continue;
}
case OPCODE_JUMP_IF: {
CHECK_SPACE(3);
GET_VARIANT_PTR(test, 1);
bool valid;
bool result = test->booleanize(valid);
#ifdef DEBUG_ENABLED
if (!valid) {
err_text = "cannot evaluate conditional expression of type: " + Variant::get_type_name(test->get_type());
break;
}
#endif
if (result) {
int to = _code_ptr[ip + 2];
ERR_BREAK(to < 0 || to > _code_size);
ip = to;
continue;
}
ip += 3;
continue;
}
case OPCODE_JUMP_IF_NOT: {
CHECK_SPACE(3);
GET_VARIANT_PTR(test, 1);
bool valid;
bool result = test->booleanize(valid);
#ifdef DEBUG_ENABLED
if (!valid) {
err_text = "cannot evaluate conditional expression of type: " + Variant::get_type_name(test->get_type());
break;
}
#endif
if (!result) {
int to = _code_ptr[ip + 2];
ERR_BREAK(to < 0 || to > _code_size);
ip = to;
continue;
}
ip += 3;
continue;
}
case OPCODE_JUMP_TO_DEF_ARGUMENT: {
CHECK_SPACE(2);
ip = _default_arg_ptr[defarg];
continue;
}
case OPCODE_RETURN: {
CHECK_SPACE(2);
GET_VARIANT_PTR(r, 1);
retvalue = *r;
exit_ok = true;
break;
}
case OPCODE_ITERATE_BEGIN: {
CHECK_SPACE(8); //space for this an regular iterate
GET_VARIANT_PTR(counter, 1);
GET_VARIANT_PTR(container, 2);
bool valid;
if (!container->iter_init(*counter, valid)) {
if (!valid) {
err_text = "Unable to iterate on object of type " + Variant::get_type_name(container->get_type()) + "'.";
break;
}
int jumpto = _code_ptr[ip + 3];
ERR_BREAK(jumpto < 0 || jumpto > _code_size);
ip = jumpto;
continue;
}
GET_VARIANT_PTR(iterator, 4);
*iterator = container->iter_get(*counter, valid);
if (!valid) {
err_text = "Unable to obtain iterator object of type " + Variant::get_type_name(container->get_type()) + "'.";
break;
}
ip += 5; //skip regular iterate which is always next
continue;
}
case OPCODE_ITERATE: {
CHECK_SPACE(4);
GET_VARIANT_PTR(counter, 1);
GET_VARIANT_PTR(container, 2);
bool valid;
if (!container->iter_next(*counter, valid)) {
if (!valid) {
err_text = "Unable to iterate on object of type " + Variant::get_type_name(container->get_type()) + "' (type changed since first iteration?).";
break;
}
int jumpto = _code_ptr[ip + 3];
ERR_BREAK(jumpto < 0 || jumpto > _code_size);
ip = jumpto;
continue;
}
GET_VARIANT_PTR(iterator, 4);
*iterator = container->iter_get(*counter, valid);
if (!valid) {
err_text = "Unable to obtain iterator object of type " + Variant::get_type_name(container->get_type()) + "' (but was obtained on first iteration?).";
break;
}
ip += 5; //loop again
continue;
}
case OPCODE_ASSERT: {
CHECK_SPACE(2);
GET_VARIANT_PTR(test, 1);
#ifdef DEBUG_ENABLED
bool valid;
bool result = test->booleanize(valid);
if (!valid) {
err_text = "cannot evaluate conditional expression of type: " + Variant::get_type_name(test->get_type());
break;
}
if (!result) {
err_text = "Assertion failed.";
break;
}
#endif
ip += 2;
continue;
}
case OPCODE_BREAKPOINT: {
#ifdef DEBUG_ENABLED
if (ScriptDebugger::get_singleton()) {
GDScriptLanguage::get_singleton()->debug_break("Breakpoint Statement", true);
}
#endif
ip += 1;
continue;
}
case OPCODE_LINE: {
CHECK_SPACE(2);
line = _code_ptr[ip + 1];
ip += 2;
if (ScriptDebugger::get_singleton()) {
// line
bool do_break = false;
if (ScriptDebugger::get_singleton()->get_lines_left() > 0) {
if (ScriptDebugger::get_singleton()->get_depth() <= 0)
ScriptDebugger::get_singleton()->set_lines_left(ScriptDebugger::get_singleton()->get_lines_left() - 1);
if (ScriptDebugger::get_singleton()->get_lines_left() <= 0)
do_break = true;
}
if (ScriptDebugger::get_singleton()->is_breakpoint(line, source))
do_break = true;
if (do_break) {
GDScriptLanguage::get_singleton()->debug_break("Breakpoint", true);
}
ScriptDebugger::get_singleton()->line_poll();
}
continue;
}
case OPCODE_END: {
exit_ok = true;
break;
}
default: {
err_text = "Illegal opcode " + itos(_code_ptr[ip]) + " at address " + itos(ip);
break;
}
}
if (exit_ok)
break;
//error
// function, file, line, error, explanation
String err_file;
if (p_instance)
err_file = p_instance->script->path;
else if (_class)
err_file = _class->path;
if (err_file == "")
err_file = "<built-in>";
String err_func = name;
if (p_instance && p_instance->script->name != "")
err_func = p_instance->script->name + "." + err_func;
int err_line = line;
if (err_text == "") {
err_text = "Internal Script Error! - opcode #" + itos(last_opcode) + " (report please).";
}
if (!GDScriptLanguage::get_singleton()->debug_break(err_text, false)) {
// debugger break did not happen
_err_print_error(err_func.utf8().get_data(), err_file.utf8().get_data(), err_line, err_text.utf8().get_data(), ERR_HANDLER_SCRIPT);
}
break;
}
#ifdef DEBUG_ENABLED
if (GDScriptLanguage::get_singleton()->profiling) {
uint64_t time_taken = OS::get_singleton()->get_ticks_usec() - function_start_time;
profile.total_time += time_taken;
profile.self_time += time_taken - function_call_time;
profile.frame_total_time += time_taken;
profile.frame_self_time += time_taken - function_call_time;
GDScriptLanguage::get_singleton()->script_frame_time += time_taken - function_call_time;
}
#endif
if (ScriptDebugger::get_singleton())
GDScriptLanguage::get_singleton()->exit_function();
if (_stack_size) {
//free stack
for (int i = 0; i < _stack_size; i++)
stack[i].~Variant();
}
return retvalue;
}
const int *GDFunction::get_code() const {
return _code_ptr;
}
int GDFunction::get_code_size() const {
return _code_size;
}
Variant GDFunction::get_constant(int p_idx) const {
ERR_FAIL_INDEX_V(p_idx, constants.size(), "<errconst>");
return constants[p_idx];
}
StringName GDFunction::get_global_name(int p_idx) const {
ERR_FAIL_INDEX_V(p_idx, global_names.size(), "<errgname>");
return global_names[p_idx];
}
int GDFunction::get_default_argument_count() const {
return default_arguments.size();
}
int GDFunction::get_default_argument_addr(int p_idx) const {
ERR_FAIL_INDEX_V(p_idx, default_arguments.size(), -1);
return default_arguments[p_idx];
}
StringName GDFunction::get_name() const {
return name;
}
int GDFunction::get_max_stack_size() const {
return _stack_size;
}
struct _GDFKC {
int order;
List<int> pos;
};
struct _GDFKCS {
int order;
StringName id;
int pos;
bool operator<(const _GDFKCS &p_r) const {
return order < p_r.order;
}
};
void GDFunction::debug_get_stack_member_state(int p_line, List<Pair<StringName, int> > *r_stackvars) const {
int oc = 0;
Map<StringName, _GDFKC> sdmap;
for (const List<StackDebug>::Element *E = stack_debug.front(); E; E = E->next()) {
const StackDebug &sd = E->get();
if (sd.line > p_line)
break;
if (sd.added) {
if (!sdmap.has(sd.identifier)) {
_GDFKC d;
d.order = oc++;
d.pos.push_back(sd.pos);
sdmap[sd.identifier] = d;
} else {
sdmap[sd.identifier].pos.push_back(sd.pos);
}
} else {
ERR_CONTINUE(!sdmap.has(sd.identifier));
sdmap[sd.identifier].pos.pop_back();
if (sdmap[sd.identifier].pos.empty())
sdmap.erase(sd.identifier);
}
}
List<_GDFKCS> stackpositions;
for (Map<StringName, _GDFKC>::Element *E = sdmap.front(); E; E = E->next()) {
_GDFKCS spp;
spp.id = E->key();
spp.order = E->get().order;
spp.pos = E->get().pos.back()->get();
stackpositions.push_back(spp);
}
stackpositions.sort();
for (List<_GDFKCS>::Element *E = stackpositions.front(); E; E = E->next()) {
Pair<StringName, int> p;
p.first = E->get().id;
p.second = E->get().pos;
r_stackvars->push_back(p);
}
}
GDFunction::GDFunction()
: function_list(this) {
_stack_size = 0;
_call_size = 0;
rpc_mode = ScriptInstance::RPC_MODE_DISABLED;
name = "<anonymous>";
#ifdef DEBUG_ENABLED
_func_cname = NULL;
if (GDScriptLanguage::get_singleton()->lock) {
GDScriptLanguage::get_singleton()->lock->lock();
}
GDScriptLanguage::get_singleton()->function_list.add(&function_list);
if (GDScriptLanguage::get_singleton()->lock) {
GDScriptLanguage::get_singleton()->lock->unlock();
}
profile.call_count = 0;
profile.self_time = 0;
profile.total_time = 0;
profile.frame_call_count = 0;
profile.frame_self_time = 0;
profile.frame_total_time = 0;
profile.last_frame_call_count = 0;
profile.last_frame_self_time = 0;
profile.last_frame_total_time = 0;
#endif
}
GDFunction::~GDFunction() {
#ifdef DEBUG_ENABLED
if (GDScriptLanguage::get_singleton()->lock) {
GDScriptLanguage::get_singleton()->lock->lock();
}
GDScriptLanguage::get_singleton()->function_list.remove(&function_list);
if (GDScriptLanguage::get_singleton()->lock) {
GDScriptLanguage::get_singleton()->lock->unlock();
}
#endif
}
/////////////////////
Variant GDFunctionState::_signal_callback(const Variant **p_args, int p_argcount, Variant::CallError &r_error) {
#ifdef DEBUG_ENABLED
if (state.instance_id && !ObjectDB::get_instance(state.instance_id)) {
ERR_EXPLAIN("Resumed after yield, but class instance is gone");
ERR_FAIL_V(Variant());
}
if (state.script_id && !ObjectDB::get_instance(state.script_id)) {
ERR_EXPLAIN("Resumed after yield, but script is gone");
ERR_FAIL_V(Variant());
}
#endif
Variant arg;
r_error.error = Variant::CallError::CALL_OK;
ERR_FAIL_COND_V(!function, Variant());
if (p_argcount == 0) {
r_error.error = Variant::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS;
r_error.argument = 1;
return Variant();
} else if (p_argcount == 1) {
//noooneee
} else if (p_argcount == 2) {
arg = *p_args[0];
} else {
Array extra_args;
for (int i = 0; i < p_argcount - 1; i++) {
extra_args.push_back(*p_args[i]);
}
arg = extra_args;
}
Ref<GDFunctionState> self = *p_args[p_argcount - 1];
if (self.is_null()) {
r_error.error = Variant::CallError::CALL_ERROR_INVALID_ARGUMENT;
r_error.argument = p_argcount - 1;
r_error.expected = Variant::OBJECT;
return Variant();
}
state.result = arg;
Variant ret = function->call(NULL, NULL, 0, r_error, &state);
bool completed = true;
// If the return value is a GDFunctionState reference,
// then the function did yield again after resuming.
if (ret.is_ref()) {
GDFunctionState *gdfs = Object::cast_to<GDFunctionState>(ret);
if (gdfs && gdfs->function == function)
completed = false;
}
function = NULL; //cleaned up;
state.result = Variant();
if (completed) {
emit_signal("completed", ret);
}
return ret;
}
bool GDFunctionState::is_valid(bool p_extended_check) const {
if (function == NULL)
return false;
if (p_extended_check) {
//class instance gone?
if (state.instance_id && !ObjectDB::get_instance(state.instance_id))
return false;
//script gone?
if (state.script_id && !ObjectDB::get_instance(state.script_id))
return false;
}
return true;
}
Variant GDFunctionState::resume(const Variant &p_arg) {
ERR_FAIL_COND_V(!function, Variant());
#ifdef DEBUG_ENABLED
if (state.instance_id && !ObjectDB::get_instance(state.instance_id)) {
ERR_EXPLAIN("Resumed after yield, but class instance is gone");
ERR_FAIL_V(Variant());
}
if (state.script_id && !ObjectDB::get_instance(state.script_id)) {
ERR_EXPLAIN("Resumed after yield, but script is gone");
ERR_FAIL_V(Variant());
}
#endif
state.result = p_arg;
Variant::CallError err;
Variant ret = function->call(NULL, NULL, 0, err, &state);
bool completed = true;
// If the return value is a GDFunctionState reference,
// then the function did yield again after resuming.
if (ret.is_ref()) {
GDFunctionState *gdfs = Object::cast_to<GDFunctionState>(ret);
if (gdfs && gdfs->function == function)
completed = false;
}
function = NULL; //cleaned up;
state.result = Variant();
if (completed) {
emit_signal("completed", ret);
}
return ret;
}
void GDFunctionState::_bind_methods() {
ClassDB::bind_method(D_METHOD("resume", "arg"), &GDFunctionState::resume, DEFVAL(Variant()));
ClassDB::bind_method(D_METHOD("is_valid", "extended_check"), &GDFunctionState::is_valid, DEFVAL(false));
ClassDB::bind_vararg_method(METHOD_FLAGS_DEFAULT, "_signal_callback", &GDFunctionState::_signal_callback, MethodInfo("_signal_callback"));
ADD_SIGNAL(MethodInfo("completed", PropertyInfo(Variant::NIL, "result")));
}
GDFunctionState::GDFunctionState() {
function = NULL;
}
GDFunctionState::~GDFunctionState() {
if (function != NULL) {
//never called, deinitialize stack
for (int i = 0; i < state.stack_size; i++) {
Variant *v = (Variant *)&state.stack[sizeof(Variant) * i];
v->~Variant();
}
}
}
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