remove `_s` in `Frame`

include/pocketpy/frame.h

@@ -79,7 +79,6 @@ using ValueStack = ValueStackImpl<PK_VM_STACK_SIZE>;
 struct Frame {
     int _ip;
     int _next_ip;
-    ValueStack* _s;
     // This is for unwinding only, use `actual_sp_base()` for value stack access
     PyObject** _sp_base;
 
@@ -91,14 +90,14 @@ struct Frame {
     NameDict& f_globals() noexcept { return _module->attr(); }
     PyObject* f_closure_try_get(StrName name);
 
-    Frame(ValueStack* _s, PyObject** p0, const CodeObject* co, PyObject* _module, PyObject* _callable)
-            : _ip(-1), _next_ip(0), _s(_s), _sp_base(p0), co(co), _module(_module), _callable(_callable), _locals(co, p0) { }
+    Frame(PyObject** p0, const CodeObject* co, PyObject* _module, PyObject* _callable)
+            : _ip(-1), _next_ip(0), _sp_base(p0), co(co), _module(_module), _callable(_callable), _locals(co, p0) { }
 
-    Frame(ValueStack* _s, PyObject** p0, const CodeObject* co, PyObject* _module, PyObject* _callable, FastLocals _locals)
-            : _ip(-1), _next_ip(0), _s(_s), _sp_base(p0), co(co), _module(_module), _callable(_callable), _locals(_locals) { }
+    Frame(PyObject** p0, const CodeObject* co, PyObject* _module, PyObject* _callable, FastLocals _locals)
+            : _ip(-1), _next_ip(0), _sp_base(p0), co(co), _module(_module), _callable(_callable), _locals(_locals) { }
 
-    Frame(ValueStack* _s, PyObject** p0, const CodeObject_& co, PyObject* _module)
-            : _ip(-1), _next_ip(0), _s(_s), _sp_base(p0), co(co.get()), _module(_module), _callable(nullptr), _locals(co.get(), p0) {}
+    Frame(PyObject** p0, const CodeObject_& co, PyObject* _module)
+            : _ip(-1), _next_ip(0), _sp_base(p0), co(co.get()), _module(_module), _callable(nullptr), _locals(co.get(), p0) {}
 
     int next_bytecode() {
         _ip = _next_ip++;
@@ -109,13 +108,14 @@ struct Frame {
     }
 
     PyObject** actual_sp_base() const { return _locals.a; }
-    int stack_size() const { return _s->_sp - actual_sp_base(); }
-    ArgsView stack_view() const { return ArgsView(actual_sp_base(), _s->_sp); }
+
+    int stack_size(ValueStack* _s) const { return _s->_sp - actual_sp_base(); }
+    ArgsView stack_view(ValueStack* _s) const { return ArgsView(actual_sp_base(), _s->_sp); }
 
     void jump_abs(int i){ _next_ip = i; }
-    bool jump_to_exception_handler();
-    int _exit_block(int i);
-    void jump_abs_break(int target);
+    bool jump_to_exception_handler(ValueStack*);
+    int _exit_block(ValueStack*, int);
+    void jump_abs_break(ValueStack*, int);
 
     void _gc_mark() const {
         PK_OBJ_MARK(_module);

include/pocketpy/vm.h

@@ -172,7 +172,7 @@ public:
 
     template<typename ...Args>
     PyObject* _exec(Args&&... args){
-        callstack.emplace(&s_data, s_data._sp, std::forward<Args>(args)...);
+        callstack.emplace(s_data._sp, std::forward<Args>(args)...);
         return _run_top_frame();
     }
 

src/ceval.cpp

@@ -529,13 +529,13 @@ __NEXT_STEP:;
         frame->jump_abs(byte.arg);
         DISPATCH();
     TARGET(LOOP_BREAK)
-        frame->jump_abs_break(byte.arg);
+        frame->jump_abs_break(&s_data, byte.arg);
         DISPATCH();
     TARGET(GOTO) {
         StrName _name(byte.arg);
         int index = co->labels.try_get_likely_found(_name);
         if(index < 0) RuntimeError(_S("label ", _name.escape(), " not found"));
-        frame->jump_abs_break(index);
+        frame->jump_abs_break(&s_data, index);
     } DISPATCH();
     /*****************************************/
     TARGET(FSTRING_EVAL){
@@ -651,7 +651,7 @@ __NEXT_STEP:;
         if(_0 != StopIteration){
             PUSH(_0);
         }else{
-            frame->jump_abs_break(byte.arg);
+            frame->jump_abs_break(&s_data, byte.arg);
         }
     } DISPATCH();
     /*****************************************/

src/frame.cpp

@@ -23,7 +23,7 @@ namespace pkpy{
         return fn._closure->try_get(name);
     }
 
-    bool Frame::jump_to_exception_handler(){
+    bool Frame::jump_to_exception_handler(ValueStack* _s){
         // try to find a parent try block
         int block = co->iblocks[_ip];
         while(block >= 0){
@@ -34,24 +34,24 @@ namespace pkpy{
         PyObject* obj = _s->popx();         // pop exception object
         // get the stack size of the try block
         int _stack_size = co->blocks[block].base_stack_size;
-        if(stack_size() < _stack_size) throw std::runtime_error(_S("invalid state: ", stack_size(), '<', _stack_size).str());
+        if(stack_size(_s) < _stack_size) throw std::runtime_error(_S("invalid state: ", stack_size(_s), '<', _stack_size).str());
         _s->reset(actual_sp_base() + _locals.size() + _stack_size);          // rollback the stack   
         _s->push(obj);                                      // push exception object
         _next_ip = co->blocks[block].end;
         return true;
     }
 
-    int Frame::_exit_block(int i){
+    int Frame::_exit_block(ValueStack* _s, int i){
         auto type = co->blocks[i].type;
         if(type==CodeBlockType::FOR_LOOP || type==CodeBlockType::CONTEXT_MANAGER) _s->pop();
         return co->blocks[i].parent;
     }
 
-    void Frame::jump_abs_break(int target){
+    void Frame::jump_abs_break(ValueStack* _s, int target){
         int i = co->iblocks[_ip];
         _next_ip = target;
         if(_next_ip >= co->codes.size()){
-            while(i>=0) i = _exit_block(i);
+            while(i>=0) i = _exit_block(_s, i);
         }else{
             // BUG (solved)
             // for i in range(4):
@@ -59,7 +59,7 @@ namespace pkpy{
             // # if there is no op here, the block check will fail
             // while i: --i
             int next_block = co->iblocks[target];
-            while(i>=0 && i!=next_block) i = _exit_block(i);
+            while(i>=0 && i!=next_block) i = _exit_block(_s, i);
             if(i!=next_block) throw std::runtime_error("invalid jump");
         }
     }

src/iter.cpp

@@ -43,10 +43,10 @@ namespace pkpy{
     PyObject* Generator::next(VM* vm){
         if(state == 2) return vm->StopIteration;
         // reset frame._sp_base
-        frame._sp_base = frame._s->_sp;
-        frame._locals.a = frame._s->_sp;
+        frame._sp_base = vm->s_data._sp;
+        frame._locals.a = vm->s_data._sp;
         // restore the context
-        for(PyObject* obj: s_backup) frame._s->push(obj);
+        for(PyObject* obj: s_backup) vm->s_data.push(obj);
         s_backup.clear();
         vm->callstack.push(std::move(frame));
 
@@ -61,8 +61,8 @@ namespace pkpy{
         if(ret == PY_OP_YIELD){
             // backup the context
             frame = std::move(vm->callstack.top());
-            ret = frame._s->popx();
-            for(PyObject* obj: frame.stack_view()) s_backup.push_back(obj);
+            ret = vm->s_data.popx();
+            for(PyObject* obj: frame.stack_view(&vm->s_data)) s_backup.push_back(obj);
             vm->_pop_frame();
             state = 1;
             if(ret == vm->StopIteration) state = 2;

src/vm.cpp

@@ -931,7 +931,7 @@ PyObject* VM::vectorcall(int ARGC, int KWARGC, bool op_call){
         if(co->is_generator){
             s_data.reset(p0);
             return _py_generator(
-                Frame(&s_data, nullptr, co, fn._module, callable),
+                Frame(nullptr, co, fn._module, callable),
                 ArgsView(buffer, buffer + co_nlocals)
             );
         }
@@ -941,7 +941,7 @@ PyObject* VM::vectorcall(int ARGC, int KWARGC, bool op_call){
         for(int j=0; j<co_nlocals; j++) _base[j] = buffer[j];
 
 __FAST_CALL:
-        callstack.emplace(&s_data, p0, co, fn._module, callable, FastLocals(co, args.begin()));
+        callstack.emplace(p0, co, fn._module, callable, FastLocals(co, args.begin()));
         if(op_call) return PY_OP_CALL;
         return _run_top_frame();
         /*****************_py_call*****************/
@@ -1244,7 +1244,7 @@ void VM::_raise(bool re_raise){
         e._ip_on_error = frame->_ip;
         e._code_on_error = (void*)frame->co;
     }
-    bool ok = frame->jump_to_exception_handler();
+    bool ok = frame->jump_to_exception_handler(&s_data);
 
     int actual_ip = frame->_ip;
     if(e._ip_on_error >= 0 && e._code_on_error == (void*)frame->co) actual_ip = e._ip_on_error;