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jscript: Store function arguments on JS stack and transfer them to variable object only when needed. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2016-07-28 18:44:43 +02:00 committed by Alexandre Julliard
parent ba2e025b94
commit 5e4d3826ec
5 changed files with 160 additions and 83 deletions
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133
dlls/jscript/engine.c
View File

@ -267,13 +267,8 @@ HRESULT scope_push(scope_chain_t *scope, jsdisp_t *jsobj, IDispatch *obj, scope_
IDispatch_AddRef(obj);
new_scope->jsobj = jsobj;
new_scope->obj = obj;
if(scope) {
scope_addref(scope);
new_scope->next = scope;
}else {
new_scope->next = NULL;
}
new_scope->frame = NULL;
new_scope->next = scope ? scope_addref(scope) : NULL;
*ret = new_scope;
return S_OK;
@ -427,6 +422,34 @@ static HRESULT equal2_values(jsval_t lval, jsval_t rval, BOOL *ret)
return S_OK;
}
/*
* Transfers local variables from stack to variable object.
* It's slow, so we want to avoid it as much as possible.
*/
HRESULT detach_variable_object(script_ctx_t *ctx, call_frame_t *frame)
{
unsigned i;
HRESULT hres;
if(!frame->base_scope || !frame->base_scope->frame)
return S_OK;
TRACE("detaching %p\n", frame);
assert(frame == frame->base_scope->frame);
assert(frame->variable_obj == frame->base_scope->jsobj);
frame->base_scope->frame = NULL;
for(i = 0; i < frame->function->param_cnt; i++) {
hres = jsdisp_propput_name(frame->variable_obj, frame->function->params[i], ctx->stack[frame->arguments_off+i]);
if(FAILED(hres))
return hres;
}
return S_OK;
}
static BOOL lookup_global_members(script_ctx_t *ctx, BSTR identifier, exprval_t *ret)
{
named_item_t *item;
@ -459,6 +482,11 @@ static HRESULT identifier_eval(script_ctx_t *ctx, BSTR identifier, exprval_t *re
if(ctx->call_ctx) {
for(scope = ctx->call_ctx->scope; scope; scope = scope->next) {
if(scope->frame) {
hres = detach_variable_object(ctx, scope->frame);
if(FAILED(hres))
return hres;
}
if(scope->jsobj)
hres = jsdisp_get_id(scope->jsobj, identifier, fdexNameImplicit, &id);
else
@ -2379,8 +2407,10 @@ OP_LIST
#undef X
};
static void release_call_frame(call_frame_t *frame)
static void pop_call_frame(script_ctx_t *ctx)
{
call_frame_t *frame = ctx->call_ctx;
if(frame->arguments_obj) {
/* Reset arguments value to cut the reference cycle. Note that since all activation contexts have
* their own arguments property, it's impossible to use prototype's one during name lookup */
@ -2388,14 +2418,28 @@ static void release_call_frame(call_frame_t *frame)
jsdisp_propput_name(frame->variable_obj, argumentsW, jsval_undefined());
jsdisp_release(frame->arguments_obj);
}
if(frame->scope) {
/* If current scope will be kept alive, we need to transfer local variables to its variable object. */
if(frame->scope->ref > 1) {
HRESULT hres = detach_variable_object(ctx, frame);
if(FAILED(hres))
ERR("Failed to detach variable object: %08x\n", hres);
}
scope_release(frame->scope);
}
frame->stack_base -= frame->pop_locals;
stack_popn(ctx, frame->pop_locals);
ctx->call_ctx = frame->prev_frame;
if(frame->function_instance)
jsdisp_release(frame->function_instance);
if(frame->variable_obj)
jsdisp_release(frame->variable_obj);
if(frame->this_obj)
IDispatch_Release(frame->this_obj);
if(frame->scope)
scope_release(frame->scope);
jsval_release(frame->ret);
release_bytecode(frame->bytecode);
heap_free(frame);
@ -2417,9 +2461,8 @@ static HRESULT unwind_exception(script_ctx_t *ctx, HRESULT exception_hres)
stack_popn(ctx, ctx->stack_top-frame->stack_base);
ctx->call_ctx = frame->prev_frame;
flags = frame->flags;
release_call_frame(frame);
pop_call_frame(ctx);
if(!(flags & EXEC_RETURN_TO_INTERP))
return exception_hres;
}
@ -2492,14 +2535,13 @@ static HRESULT enter_bytecode(script_ctx_t *ctx, jsval_t *r)
assert(ctx->stack_top == frame->stack_base);
assert(frame->scope == frame->base_scope);
ctx->call_ctx = frame->prev_frame;
if(return_to_interp) {
clear_ret(ctx->call_ctx);
ctx->call_ctx->ret = steal_ret(frame);
clear_ret(frame->prev_frame);
frame->prev_frame->ret = steal_ret(frame);
}else if(r) {
*r = steal_ret(frame);
}
release_call_frame(frame);
pop_call_frame(ctx);
if(!return_to_interp)
break;
}else {
@ -2547,8 +2589,41 @@ static HRESULT bind_event_target(script_ctx_t *ctx, function_code_t *func, jsdis
return hres;
}
static HRESULT setup_scope(script_ctx_t *ctx, call_frame_t *frame, unsigned argc, jsval_t *argv)
{
unsigned i;
jsval_t v;
HRESULT hres;
frame->arguments_off = ctx->stack_top;
for(i = 0; i < argc; i++) {
hres = jsval_copy(argv[i], &v);
if(SUCCEEDED(hres))
hres = stack_push(ctx, v);
if(FAILED(hres)) {
stack_popn(ctx, i);
return hres;
}
}
/* If fewer than declared arguments were passed, fill remaining with undefined value. */
for(; i < frame->function->param_cnt; i++) {
hres = stack_push(ctx, jsval_undefined());
if(FAILED(hres)) {
stack_popn(ctx, i);
return hres;
}
}
frame->pop_locals = i;
frame->base_scope->frame = frame;
return S_OK;
}
HRESULT exec_source(script_ctx_t *ctx, DWORD flags, bytecode_t *bytecode, function_code_t *function, scope_chain_t *scope,
IDispatch *this_obj, jsdisp_t *function_instance, jsdisp_t *variable_obj, jsdisp_t *arguments_obj, jsval_t *r)
IDispatch *this_obj, jsdisp_t *function_instance, jsdisp_t *variable_obj, unsigned argc, jsval_t *argv,
jsdisp_t *arguments_obj, jsval_t *r)
{
call_frame_t *frame;
unsigned i;
@ -2595,18 +2670,34 @@ HRESULT exec_source(script_ctx_t *ctx, DWORD flags, bytecode_t *bytecode, functi
}
}
if(ctx->call_ctx && (flags & EXEC_EVAL)) {
hres = detach_variable_object(ctx, ctx->call_ctx);
if(FAILED(hres))
return hres;
}
frame = heap_alloc_zero(sizeof(*frame));
if(!frame)
return E_OUTOFMEMORY;
frame->bytecode = bytecode_addref(bytecode);
frame->function = function;
frame->ip = function->instr_off;
frame->stack_base = ctx->stack_top;
frame->ret = jsval_undefined();
if(scope)
if(scope) {
frame->base_scope = frame->scope = scope_addref(scope);
if(!(flags & (EXEC_GLOBAL|EXEC_EVAL))) {
hres = setup_scope(ctx, frame, argc, argv);
if(FAILED(hres)) {
heap_free(frame);
return hres;
}
}
}
frame->bytecode = bytecode_addref(bytecode);
frame->ip = function->instr_off;
frame->stack_base = ctx->stack_top;
if(this_obj)
frame->this_obj = this_obj;
else if(ctx->host_global)

9
dlls/jscript/engine.h
View File

@ -178,6 +178,7 @@ typedef struct _scope_chain_t {
LONG ref;
jsdisp_t *jsobj;
IDispatch *obj;
struct _call_frame_t *frame;
struct _scope_chain_t *next;
} scope_chain_t;
@ -208,17 +209,23 @@ typedef struct _call_frame_t {
jsdisp_t *arguments_obj;
DWORD flags;
unsigned pop_locals;
unsigned arguments_off;
bytecode_t *bytecode;
function_code_t *function;
struct _call_frame_t *prev_frame;
} call_frame_t;
HRESULT detach_variable_object(script_ctx_t*,call_frame_t*) DECLSPEC_HIDDEN;
#define EXEC_GLOBAL 0x0001
#define EXEC_CONSTRUCTOR 0x0002
#define EXEC_RETURN_TO_INTERP 0x0004
#define EXEC_EVAL 0x0008
HRESULT exec_source(script_ctx_t*,DWORD,bytecode_t*,function_code_t*,scope_chain_t*,IDispatch*,
jsdisp_t*,jsdisp_t*,jsdisp_t*,jsval_t*) DECLSPEC_HIDDEN;
jsdisp_t*,jsdisp_t*,unsigned,jsval_t*,jsdisp_t*,jsval_t*) DECLSPEC_HIDDEN;
HRESULT create_source_function(script_ctx_t*,bytecode_t*,function_code_t*,scope_chain_t*,jsdisp_t**) DECLSPEC_HIDDEN;

93
dlls/jscript/function.c
View File

@ -39,7 +39,7 @@ typedef struct {
typedef struct {
jsdisp_t jsdisp;
FunctionInstance *function;
jsdisp_t *var_obj;
scope_chain_t *scope;
} ArgumentsInstance;
static inline FunctionInstance *function_from_jsdisp(jsdisp_t *jsdisp)
@ -65,21 +65,6 @@ static const WCHAR applyW[] = {'a','p','p','l','y',0};
static const WCHAR callW[] = {'c','a','l','l',0};
static const WCHAR argumentsW[] = {'a','r','g','u','m','e','n','t','s',0};
static HRESULT init_parameters(jsdisp_t *var_disp, FunctionInstance *function, unsigned argc, jsval_t *argv)
{
DWORD i=0;
HRESULT hres;
for(i=0; i < function->func_code->param_cnt; i++) {
hres = jsdisp_propput_name(var_disp, function->func_code->params[i],
i < argc ? argv[i] : jsval_undefined());
if(FAILED(hres))
return hres;
}
return S_OK;
}
static HRESULT Arguments_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
jsval_t *r)
{
@ -91,8 +76,10 @@ static void Arguments_destructor(jsdisp_t *jsdisp)
{
ArgumentsInstance *arguments = (ArgumentsInstance*)jsdisp;
TRACE("(%p)\n", arguments);
jsdisp_release(&arguments->function->dispex);
jsdisp_release(arguments->var_obj);
scope_release(arguments->scope);
heap_free(arguments);
}
@ -108,8 +95,15 @@ static HRESULT Arguments_idx_get(jsdisp_t *jsdisp, unsigned idx, jsval_t *res)
TRACE("%p[%u]\n", arguments, idx);
if(arguments->scope->frame) {
HRESULT hres;
hres = detach_variable_object(jsdisp->ctx, arguments->scope->frame);
if(FAILED(hres))
return hres;
}
/* FIXME: Accessing by name won't work for duplicated argument names */
return jsdisp_propget_name(arguments->var_obj, arguments->function->func_code->params[idx], res);
return jsdisp_propget_name(arguments->scope->jsobj, arguments->function->func_code->params[idx], res);
}
static HRESULT Arguments_idx_put(jsdisp_t *jsdisp, unsigned idx, jsval_t val)
@ -118,8 +112,15 @@ static HRESULT Arguments_idx_put(jsdisp_t *jsdisp, unsigned idx, jsval_t val)
TRACE("%p[%u] = %s\n", arguments, idx, debugstr_jsval(val));
if(arguments->scope->frame) {
HRESULT hres;
hres = detach_variable_object(jsdisp->ctx, arguments->scope->frame);
if(FAILED(hres))
return hres;
}
/* FIXME: Accessing by name won't work for duplicated argument names */
return jsdisp_propput_name(arguments->var_obj, arguments->function->func_code->params[idx], val);
return jsdisp_propput_name(arguments->scope->jsobj, arguments->function->func_code->params[idx], val);
}
static const builtin_info_t Arguments_info = {
@ -133,7 +134,7 @@ static const builtin_info_t Arguments_info = {
Arguments_idx_put
};
static HRESULT create_arguments(script_ctx_t *ctx, FunctionInstance *calee, jsdisp_t *var_obj,
static HRESULT create_arguments(script_ctx_t *ctx, FunctionInstance *calee, scope_chain_t *scope,
unsigned argc, jsval_t *argv, jsdisp_t **ret)
{
ArgumentsInstance *args;
@ -154,7 +155,7 @@ static HRESULT create_arguments(script_ctx_t *ctx, FunctionInstance *calee, jsdi
jsdisp_addref(&calee->dispex);
args->function = calee;
args->var_obj = jsdisp_addref(var_obj);
args->scope = scope_addref(scope);
/* Store unnamed arguments directly in arguments object */
for(i = calee->length; i < argc; i++) {
@ -182,25 +183,6 @@ static HRESULT create_arguments(script_ctx_t *ctx, FunctionInstance *calee, jsdi
return S_OK;
}
static HRESULT create_var_disp(script_ctx_t *ctx, FunctionInstance *function, unsigned argc, jsval_t *argv, jsdisp_t **ret)
{
jsdisp_t *var_disp;
HRESULT hres;
hres = create_dispex(ctx, NULL, NULL, &var_disp);
if(FAILED(hres))
return hres;
hres = init_parameters(var_disp, function, argc, argv);
if(FAILED(hres)) {
jsdisp_release(var_disp);
return hres;
}
*ret = var_disp;
return S_OK;
}
static HRESULT invoke_source(script_ctx_t *ctx, FunctionInstance *function, IDispatch *this_obj, unsigned argc, jsval_t *argv,
BOOL is_constructor, BOOL caller_execs_source, jsval_t *r)
{
@ -218,24 +200,22 @@ static HRESULT invoke_source(script_ctx_t *ctx, FunctionInstance *function, IDis
return E_FAIL;
}
hres = create_var_disp(ctx, function, argc, argv, &var_disp);
hres = create_dispex(ctx, NULL, NULL, &var_disp);
if(FAILED(hres))
return hres;
hres = create_arguments(ctx, function, var_disp, argc, argv, &arg_disp);
if(FAILED(hres)) {
jsdisp_release(var_disp);
return hres;
}
hres = jsdisp_propput(var_disp, argumentsW, PROPF_DONTDELETE, jsval_obj(arg_disp));
if(FAILED(hres)) {
jsdisp_release(arg_disp);
jsdisp_release(var_disp);
return hres;
}
hres = scope_push(function->scope_chain, var_disp, to_disp(var_disp), &scope);
jsdisp_release(var_disp);
if(FAILED(hres))
return hres;
hres = create_arguments(ctx, function, scope, argc, argv, &arg_disp);
if(FAILED(hres)) {
scope_release(scope);
return hres;
}
hres = jsdisp_propput(scope->jsobj, argumentsW, PROPF_DONTDELETE, jsval_obj(arg_disp));
if(SUCCEEDED(hres)) {
DWORD exec_flags = 0;
@ -244,13 +224,12 @@ static HRESULT invoke_source(script_ctx_t *ctx, FunctionInstance *function, IDis
if(is_constructor)
exec_flags |= EXEC_CONSTRUCTOR;
hres = exec_source(ctx, exec_flags, function->code, function->func_code, scope, this_obj,
&function->dispex, var_disp, arg_disp, r);
&function->dispex, scope->jsobj, argc, argv, arg_disp, r);
scope_release(scope);
}
jsdisp_release(arg_disp);
jsdisp_release(var_disp);
scope_release(scope);
return hres;
}

4
dlls/jscript/global.c
View File

@ -189,7 +189,7 @@ HRESULT JSGlobal_eval(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned a
jsval_t *r)
{
call_frame_t *frame;
DWORD exec_flags = 0;
DWORD exec_flags = EXEC_EVAL;
bytecode_t *code;
const WCHAR *src;
HRESULT hres;
@ -229,7 +229,7 @@ HRESULT JSGlobal_eval(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned a
if(flags & DISPATCH_JSCRIPT_CALLEREXECSSOURCE)
exec_flags |= EXEC_RETURN_TO_INTERP;
hres = exec_source(ctx, exec_flags, code, &code->global_code, frame->scope,
frame->this_obj, NULL, frame->variable_obj, NULL, r);
frame->this_obj, NULL, frame->variable_obj, 0, NULL, NULL, r);
release_bytecode(code);
return hres;
}

4
dlls/jscript/jscript.c
View File

@ -107,7 +107,7 @@ static HRESULT exec_global_code(JScript *This, bytecode_t *code)
IActiveScriptSite_OnEnterScript(This->site);
clear_ei(This->ctx);
hres = exec_source(This->ctx, EXEC_GLOBAL, code, &code->global_code, NULL, NULL, NULL, This->ctx->global, NULL, NULL);
hres = exec_source(This->ctx, EXEC_GLOBAL, code, &code->global_code, NULL, NULL, NULL, This->ctx->global, 0, NULL, NULL, NULL);
IActiveScriptSite_OnLeaveScript(This->site);
return hres;
@ -773,7 +773,7 @@ static HRESULT WINAPI JScriptParse_ParseScriptText(IActiveScriptParse *iface,
IActiveScriptSite_OnEnterScript(This->site);
clear_ei(This->ctx);
hres = exec_source(This->ctx, EXEC_GLOBAL, code, &code->global_code, NULL, NULL, NULL, This->ctx->global, NULL, &r);
hres = exec_source(This->ctx, EXEC_GLOBAL, code, &code->global_code, NULL, NULL, NULL, This->ctx->global, 0, NULL, NULL, &r);
if(SUCCEEDED(hres)) {
if(pvarResult)
hres = jsval_to_variant(r, pvarResult);