JSString*
jsd_GetValueString(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
JSExceptionState* exceptionState;
JSCrossCompartmentCall *call = NULL;
jsval stringval;
JSString *string;
JSBool needWrap;
JSObject *scopeObj;
if(jsdval->string)
return jsdval->string;
/* Reuse the string without copying or re-rooting it */
if(JSVAL_IS_STRING(jsdval->val)) {
jsdval->string = JSVAL_TO_STRING(jsdval->val);
return jsdval->string;
}
JS_BeginRequest(cx);
/* Objects call JS_ValueToString in their own compartment. */
scopeObj = JSVAL_IS_OBJECT(jsdval->val) ? JSVAL_TO_OBJECT(jsdval->val) : jsdc->glob;
call = JS_EnterCrossCompartmentCall(cx, scopeObj);
if(!call) {
JS_EndRequest(cx);
return NULL;
}
exceptionState = JS_SaveExceptionState(cx);
string = JS_ValueToString(cx, jsdval->val);
JS_RestoreExceptionState(cx, exceptionState);
JS_LeaveCrossCompartmentCall(call);
call = NULL;
if(string) {
stringval = STRING_TO_JSVAL(string);
call = JS_EnterCrossCompartmentCall(cx, jsdc->glob);
}
if(!string || !call || !JS_WrapValue(cx, &stringval)) {
if(call)
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(cx);
return NULL;
}
jsdval->string = JSVAL_TO_STRING(stringval);
if(!JS_AddNamedStringRoot(cx, &jsdval->string, "ValueString"))
jsdval->string = NULL;
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(cx);
return jsdval->string;
}
const char*
jsd_GetValueClassName(JSDContext* jsdc, JSDValue* jsdval)
{
jsval val = jsdval->val;
JSCrossCompartmentCall *call = NULL;
if(!jsdval->className && JSVAL_IS_OBJECT(val))
{
JSObject* obj;
if(!(obj = JSVAL_TO_OBJECT(val)))
return NULL;
JS_BeginRequest(jsdc->dumbContext);
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, obj);
if(!call) {
JS_EndRequest(jsdc->dumbContext);
return NULL;
}
if(JS_GET_CLASS(jsdc->dumbContext, obj))
jsdval->className = JS_GET_CLASS(jsdc->dumbContext, obj)->name;
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(jsdc->dumbContext);
}
return jsdval->className;
}
JSDValue*
jsd_GetValueParent(JSDContext* jsdc, JSDValue* jsdval)
{
JSCrossCompartmentCall *call = NULL;
if(!(CHECK_BIT_FLAG(jsdval->flags, GOT_PARENT)))
{
JSObject* obj;
JSObject* parent;
JS_ASSERT(!jsdval->parent);
SET_BIT_FLAG(jsdval->flags, GOT_PARENT);
if(!JSVAL_IS_OBJECT(jsdval->val))
return NULL;
if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
return NULL;
JS_BeginRequest(jsdc->dumbContext);
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, obj);
if(!call) {
JS_EndRequest(jsdc->dumbContext);
return NULL;
}
parent = JS_GetParent(jsdc->dumbContext,obj);
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(jsdc->dumbContext);
if(!parent)
return NULL;
jsdval->parent = jsd_NewValue(jsdc, OBJECT_TO_JSVAL(parent));
}
if(jsdval->parent)
jsdval->parent->nref++;
return jsdval->parent;
}
JSDValue*
jsd_GetValuePrototype(JSDContext* jsdc, JSDValue* jsdval)
{
JSCrossCompartmentCall *call = NULL;
if(!(CHECK_BIT_FLAG(jsdval->flags, GOT_PROTO)))
{
JSObject* obj;
JSObject* proto;
JS_ASSERT(!jsdval->proto);
SET_BIT_FLAG(jsdval->flags, GOT_PROTO);
if(!JSVAL_IS_OBJECT(jsdval->val))
return NULL;
if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
return NULL;
JS_BeginRequest(jsdc->dumbContext);
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, obj);
if(!call) {
JS_EndRequest(jsdc->dumbContext);
return NULL;
}
proto = JS_GetPrototype(jsdc->dumbContext, obj);
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(jsdc->dumbContext);
if(!proto)
return NULL;
jsdval->proto = jsd_NewValue(jsdc, OBJECT_TO_JSVAL(proto));
}
if(jsdval->proto)
jsdval->proto->nref++;
return jsdval->proto;
}
void
jsd_RefreshValue(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
JSCrossCompartmentCall *call = NULL;
if(jsdval->string)
{
/* if the jsval is a string, then we didn't need to root the string */
if(!JSVAL_IS_STRING(jsdval->val))
{
JS_BeginRequest(cx);
call = JS_EnterCrossCompartmentCall(cx, jsdc->glob);
if(!call) {
JS_EndRequest(cx);
return;
}
JS_RemoveStringRoot(cx, &jsdval->string);
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(cx);
}
jsdval->string = NULL;
}
jsdval->funName = NULL;
jsdval->className = NULL;
DROP_CLEAR_VALUE(jsdc, jsdval->proto);
DROP_CLEAR_VALUE(jsdc, jsdval->parent);
DROP_CLEAR_VALUE(jsdc, jsdval->ctor);
_freeProps(jsdc, jsdval);
jsdval->flags = 0;
}
void
jsd_DropValue(JSDContext* jsdc, JSDValue* jsdval)
{
JSCrossCompartmentCall *call = NULL;
JS_ASSERT(jsdval->nref > 0);
if(0 == --jsdval->nref)
{
jsd_RefreshValue(jsdc, jsdval);
if(JSVAL_IS_GCTHING(jsdval->val))
{
JS_BeginRequest(jsdc->dumbContext);
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, jsdc->glob);
if(!call) {
JS_EndRequest(jsdc->dumbContext);
return;
}
JS_RemoveValueRoot(jsdc->dumbContext, &jsdval->val);
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(jsdc->dumbContext);
}
free(jsdval);
}
}
JSString*
jsd_GetValueFunctionId(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
JSFunction* fun;
JSExceptionState* exceptionState;
JSCrossCompartmentCall *call = NULL;
if(!jsdval->funName && jsd_IsValueFunction(jsdc, jsdval))
{
JS_BeginRequest(cx);
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, JSVAL_TO_OBJECT(jsdval->val));
if(!call) {
JS_EndRequest(cx);
return NULL;
}
exceptionState = JS_SaveExceptionState(cx);
fun = JSD_GetValueFunction(jsdc, jsdval);
JS_RestoreExceptionState(cx, exceptionState);
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(cx);
if(!fun)
return NULL;
jsdval->funName = JS_GetFunctionId(fun);
/* For compatibility we return "anonymous", not an empty string here. */
if (!jsdval->funName)
jsdval->funName = JS_GetAnonymousString(jsdc->jsrt);
}
return jsdval->funName;
}
JSBool
jsd_IsValueNative(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
JSFunction* fun;
JSExceptionState* exceptionState;
JSCrossCompartmentCall *call = NULL;
if(jsd_IsValueFunction(jsdc, jsdval))
{
JSBool ok = JS_FALSE;
JS_BeginRequest(cx);
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, JSVAL_TO_OBJECT(jsdval->val));
if(!call) {
JS_EndRequest(cx);
return JS_FALSE;
}
exceptionState = JS_SaveExceptionState(cx);
fun = JSD_GetValueFunction(jsdc, jsdval);
JS_RestoreExceptionState(cx, exceptionState);
if(fun)
ok = JS_GetFunctionScript(cx, fun) ? JS_FALSE : JS_TRUE;
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(cx);
JS_ASSERT(fun);
return ok;
}
return !JSVAL_IS_PRIMITIVE(jsdval->val);
}
static JSBool _buildProps(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
JSObject *obj;
JSPropertyDescArray pda;
uintN i;
JSCrossCompartmentCall *call = NULL;
JS_ASSERT(JS_CLIST_IS_EMPTY(&jsdval->props));
JS_ASSERT(!(CHECK_BIT_FLAG(jsdval->flags, GOT_PROPS)));
JS_ASSERT(JSVAL_IS_OBJECT(jsdval->val));
if(JSVAL_IS_PRIMITIVE(jsdval->val))
return JS_FALSE;
obj = JSVAL_TO_OBJECT(jsdval->val);
JS_BeginRequest(cx);
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, obj);
if(!call)
{
JS_EndRequest(jsdc->dumbContext);
return JS_FALSE;
}
if(!JS_GetPropertyDescArray(cx, obj, &pda))
{
JS_EndRequest(cx);
JS_LeaveCrossCompartmentCall(call);
return JS_FALSE;
}
for(i = 0; i < pda.length; i++)
{
JSDProperty* prop = _newProperty(jsdc, &pda.array[i], 0);
if(!prop)
{
_freeProps(jsdc, jsdval);
break;
}
JS_APPEND_LINK(&prop->links, &jsdval->props);
}
JS_PutPropertyDescArray(cx, &pda);
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(cx);
SET_BIT_FLAG(jsdval->flags, GOT_PROPS);
return !JS_CLIST_IS_EMPTY(&jsdval->props);
}
/*
* Create a new JSD value referring to a jsval. Copy string values into the
* JSD compartment. Leave all other GCTHINGs in their native compartments
* and access them through cross-compartment calls.
*/
JSDValue*
jsd_NewValue(JSDContext* jsdc, jsval val)
{
JSDValue* jsdval;
JSCrossCompartmentCall *call = NULL;
if(!(jsdval = (JSDValue*) calloc(1, sizeof(JSDValue))))
return NULL;
if(JSVAL_IS_GCTHING(val))
{
JSBool ok;
JS_BeginRequest(jsdc->dumbContext);
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, jsdc->glob);
if(!call) {
JS_EndRequest(jsdc->dumbContext);
free(jsdval);
return NULL;
}
ok = JS_AddNamedValueRoot(jsdc->dumbContext, &jsdval->val, "JSDValue");
if(ok && JSVAL_IS_STRING(val)) {
if(!JS_WrapValue(jsdc->dumbContext, &val)) {
ok = JS_FALSE;
}
}
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(jsdc->dumbContext);
if(!ok)
{
free(jsdval);
return NULL;
}
}
jsdval->val = val;
jsdval->nref = 1;
JS_INIT_CLIST(&jsdval->props);
return jsdval;
}
/*
* Retrieve a JSFunction* from a JSDValue*. This differs from
* JS_ValueToFunction by fully unwrapping the object first.
*/
JSFunction*
jsd_GetValueFunction(JSDContext* jsdc, JSDValue* jsdval)
{
JSObject *obj;
JSFunction *fun;
JSCrossCompartmentCall *call = NULL;
if (!JSVAL_IS_OBJECT(jsdval->val))
return NULL;
if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
return NULL;
obj = JS_UnwrapObject(obj);
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, obj);
if (!call)
return NULL;
fun = JS_ValueToFunction(jsdc->dumbContext, OBJECT_TO_JSVAL(obj));
JS_LeaveCrossCompartmentCall(call);
return fun;
}
JSDScript*
jsd_GetScriptForValue(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
jsval val = jsdval->val;
JSFunction* fun = NULL;
JSExceptionState* exceptionState;
JSScript* script = NULL;
JSDScript* jsdscript;
JSCrossCompartmentCall *call = NULL;
if (!jsd_IsValueFunction(jsdc, jsdval))
return NULL;
JS_BeginRequest(cx);
call = JS_EnterCrossCompartmentCall(cx, JSVAL_TO_OBJECT(val));
if (!call) {
JS_EndRequest(cx);
return NULL;
}
exceptionState = JS_SaveExceptionState(cx);
fun = JSD_GetValueFunction(jsdc, jsdval);
JS_RestoreExceptionState(cx, exceptionState);
if (fun)
script = JS_GetFunctionScript(cx, fun);
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(cx);
if (!script)
return NULL;
JSD_LOCK_SCRIPTS(jsdc);
jsdscript = jsd_FindJSDScript(jsdc, script);
JSD_UNLOCK_SCRIPTS(jsdc);
return jsdscript;
}
JSDValue*
jsd_GetValueConstructor(JSDContext* jsdc, JSDValue* jsdval)
{
JSCrossCompartmentCall *call = NULL;
if(!(CHECK_BIT_FLAG(jsdval->flags, GOT_CTOR)))
{
JSObject* obj;
JSObject* proto;
JSObject* ctor;
JS_ASSERT(!jsdval->ctor);
SET_BIT_FLAG(jsdval->flags, GOT_CTOR);
if(!JSVAL_IS_OBJECT(jsdval->val))
return NULL;
if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
return NULL;
proto = JS_GetPrototype(obj);
if(!proto)
return NULL;
JS_BeginRequest(jsdc->dumbContext);
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, obj);
if(!call) {
JS_EndRequest(jsdc->dumbContext);
return NULL;
}
ctor = JS_GetConstructor(jsdc->dumbContext,proto);
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(jsdc->dumbContext);
if(!ctor)
return NULL;
jsdval->ctor = jsd_NewValue(jsdc, OBJECT_TO_JSVAL(ctor));
}
if(jsdval->ctor)
jsdval->ctor->nref++;
return jsdval->ctor;
}
JSDProperty*
jsd_GetValueProperty(JSDContext* jsdc, JSDValue* jsdval, JSString* name)
{
JSContext* cx = jsdc->dumbContext;
JSDProperty* jsdprop;
JSDProperty* iter = NULL;
JSObject* obj;
uintN attrs = 0;
JSBool found;
JSPropertyDesc pd;
const jschar * nameChars;
size_t nameLen;
jsval val, nameval;
jsid nameid;
JSCrossCompartmentCall *call = NULL;
if(!jsd_IsValueObject(jsdc, jsdval))
return NULL;
/* If we already have the prop, then return it */
while(NULL != (jsdprop = jsd_IterateProperties(jsdc, jsdval, &iter)))
{
JSString* propName = jsd_GetValueString(jsdc, jsdprop->name);
if(propName) {
intN result;
if (JS_CompareStrings(cx, propName, name, &result) && !result)
return jsdprop;
}
JSD_DropProperty(jsdc, jsdprop);
}
/* Not found in property list, look it up explicitly */
if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
return NULL;
if (!(nameChars = JS_GetStringCharsZAndLength(cx, name, &nameLen)))
return NULL;
JS_BeginRequest(cx);
call = JS_EnterCrossCompartmentCall(cx, obj);
if(!call) {
JS_EndRequest(cx);
return NULL;
}
JS_GetUCPropertyAttributes(cx, obj, nameChars, nameLen, &attrs, &found);
if (!found)
{
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(cx);
return NULL;
}
JS_ClearPendingException(cx);
if(!JS_GetUCProperty(cx, obj, nameChars, nameLen, &val))
{
if (JS_IsExceptionPending(cx))
{
if (!JS_GetPendingException(cx, &pd.value))
{
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(cx);
return NULL;
}
pd.flags = JSPD_EXCEPTION;
}
else
{
pd.flags = JSPD_ERROR;
pd.value = JSVAL_VOID;
}
}
else
{
pd.value = val;
}
JS_LeaveCrossCompartmentCall(call);
JS_EndRequest(cx);
nameval = STRING_TO_JSVAL(name);
if (!JS_ValueToId(cx, nameval, &nameid) ||
!JS_IdToValue(cx, nameid, &pd.id)) {
return NULL;
}
pd.slot = pd.spare = 0;
pd.alias = JSVAL_NULL;
pd.flags |= (attrs & JSPROP_ENUMERATE) ? JSPD_ENUMERATE : 0
| (attrs & JSPROP_READONLY) ? JSPD_READONLY : 0
| (attrs & JSPROP_PERMANENT) ? JSPD_PERMANENT : 0;
return _newProperty(jsdc, &pd, JSDPD_HINTED);
}
ScriptInterface_impl::ScriptInterface_impl(const char* nativeScopeName, const shared_ptr<ScriptRuntime>& runtime) :
m_runtime(runtime)
{
JSBool ok;
m_cx = JS_NewContext(m_runtime->m_rt, STACK_CHUNK_SIZE);
ENSURE(m_cx);
// For GC debugging:
// JS_SetGCZeal(m_cx, 2);
JS_SetContextPrivate(m_cx, NULL);
JS_SetErrorReporter(m_cx, ErrorReporter);
uint32 options = 0;
options |= JSOPTION_STRICT; // "warn on dubious practice"
options |= JSOPTION_XML; // "ECMAScript for XML support: parse <!-- --> as a token"
options |= JSOPTION_VAROBJFIX; // "recommended" (fixes variable scoping)
// Enable method JIT, unless script profiling/debugging is enabled (since profiling/debugging
// hooks are incompatible with the JIT)
// TODO: Verify what exactly is incompatible
if (!g_ScriptProfilingEnabled && !g_JSDebuggerEnabled)
{
options |= JSOPTION_METHODJIT;
// Some other JIT flags to experiment with:
options |= JSOPTION_JIT;
options |= JSOPTION_PROFILING;
}
JS_SetOptions(m_cx, options);
JS_SetVersion(m_cx, JSVERSION_LATEST);
// Threadsafe SpiderMonkey requires that we have a request before doing anything much
JS_BeginRequest(m_cx);
// We only want a single compartment per runtime
if (m_runtime->m_compartmentGlobal)
{
m_call = JS_EnterCrossCompartmentCall(m_cx, m_runtime->m_compartmentGlobal);
m_glob = JS_NewGlobalObject(m_cx, &global_class);
}
else
{
m_call = NULL;
m_glob = JS_NewCompartmentAndGlobalObject(m_cx, &global_class, NULL);
m_runtime->m_compartmentGlobal = m_glob;
}
ok = JS_InitStandardClasses(m_cx, m_glob);
ENSURE(ok);
JS_DefineProperty(m_cx, m_glob, "global", OBJECT_TO_JSVAL(m_glob), NULL, NULL, JSPROP_ENUMERATE | JSPROP_READONLY
| JSPROP_PERMANENT);
m_nativeScope = JS_DefineObject(m_cx, m_glob, nativeScopeName, NULL, NULL, JSPROP_ENUMERATE | JSPROP_READONLY
| JSPROP_PERMANENT);
JS_DefineFunction(m_cx, m_glob, "print", ::print, 0, JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT);
JS_DefineFunction(m_cx, m_glob, "log", ::logmsg, 1, JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT);
JS_DefineFunction(m_cx, m_glob, "warn", ::warn, 1, JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT);
JS_DefineFunction(m_cx, m_glob, "error", ::error, 1, JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT);
JS_DefineFunction(m_cx, m_glob, "deepcopy", ::deepcopy, 1, JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT);
Register("ProfileStart", ::ProfileStart, 1);
Register("ProfileStop", ::ProfileStop, 0);
}
static JSDContext*
_newJSDContext(JSRuntime* jsrt,
JSD_UserCallbacks* callbacks,
void* user,
JSObject* scopeobj)
{
JSDContext* jsdc = NULL;
JSCrossCompartmentCall *call = NULL;
JSBool ok;
if( ! jsrt )
return NULL;
if( ! _validateUserCallbacks(callbacks) )
return NULL;
jsdc = (JSDContext*) calloc(1, sizeof(JSDContext));
if( ! jsdc )
goto label_newJSDContext_failure;
if( ! JSD_INIT_LOCKS(jsdc) )
goto label_newJSDContext_failure;
JS_INIT_CLIST(&jsdc->links);
jsdc->jsrt = jsrt;
if( callbacks )
memcpy(&jsdc->userCallbacks, callbacks, callbacks->size);
jsdc->user = user;
#ifdef JSD_HAS_DANGEROUS_THREAD
jsdc->dangerousThread = _dangerousThread;
#endif
JS_INIT_CLIST(&jsdc->threadsStates);
JS_INIT_CLIST(&jsdc->sources);
JS_INIT_CLIST(&jsdc->removedSources);
jsdc->sourceAlterCount = 1;
if( ! jsd_CreateAtomTable(jsdc) )
goto label_newJSDContext_failure;
if( ! jsd_InitObjectManager(jsdc) )
goto label_newJSDContext_failure;
if( ! jsd_InitScriptManager(jsdc) )
goto label_newJSDContext_failure;
jsdc->dumbContext = JS_NewContext(jsdc->jsrt, 256);
if( ! jsdc->dumbContext )
goto label_newJSDContext_failure;
JS_BeginRequest(jsdc->dumbContext);
JS_SetOptions(jsdc->dumbContext, JS_GetOptions(jsdc->dumbContext) | JSOPTION_ALLOW_XML);
jsdc->glob = JS_NewCompartmentAndGlobalObject(jsdc->dumbContext, &global_class, NULL);
if( ! jsdc->glob )
goto label_newJSDContext_failure;
call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, jsdc->glob);
if( ! call )
goto label_newJSDContext_failure;
if ( ! JS_AddNamedObjectRoot(jsdc->dumbContext, &jsdc->glob, "JSD context global") )
goto label_newJSDContext_failure;
ok = JS_InitStandardClasses(jsdc->dumbContext, jsdc->glob);
JS_LeaveCrossCompartmentCall(call);
if( ! ok )
goto label_newJSDContext_failure;
JS_EndRequest(jsdc->dumbContext);
jsdc->data = NULL;
jsdc->inited = JS_TRUE;
JSD_LOCK();
JS_INSERT_LINK(&jsdc->links, &_jsd_context_list);
JSD_UNLOCK();
return jsdc;
label_newJSDContext_failure:
if( jsdc ) {
if ( jsdc->dumbContext && jsdc->glob )
JS_RemoveObjectRootRT(JS_GetRuntime(jsdc->dumbContext), &jsdc->glob);
jsd_DestroyObjectManager(jsdc);
jsd_DestroyAtomTable(jsdc);
if( jsdc->dumbContext )
JS_EndRequest(jsdc->dumbContext);
free(jsdc);
}
return NULL;
}
