void X86AsmGenerator::storeArrayIemHandler(){
int backTimes = -1;
SymbolTableItem *storeArray = curSymbolTable->getItem(curMidCode.arg1, 0, backTimes);
int itemSize = 0;
if (storeArray->symbolType == arrayInteger) {
itemSize = INTEGER_SIZE;
}else if (storeArray->symbolType == arrayChar) {
itemSize = CHAR_SIZE;
}else {
errorGlobal(WAIT_FOR_DEFINE);
}
if (backTimes == 0) {
genX86Asm("pop eax"); //val
genX86Asm("pop ecx"); //offset
genX86Asm("mov ebx, ebp");
genX86Asm("sub ebx, " + intToString(storeArray->addr));
genX86Asm("imul ecx, ecx, " + intToString(itemSize)); //offset*itemsize
genX86Asm("sub ebx, ecx");
genX86Asm("mov DWORD ptr [ebx], eax");
} else if (backTimes > 0) {
setDynamicBaseAddrReg(backTimes);
genX86Asm("pop eax"); //val
genX86Asm("pop ecx"); //offset
genX86Asm("sub ebx, " + intToString(storeArray->addr));
genX86Asm("imul ecx, ecx, " + intToString(itemSize)); //offset*itemsize
genX86Asm("sub ebx, ecx");
genX86Asm("mov DWORD ptr [ebx], eax");
} else {
errorGlobal(WAIT_FOR_DEFINE);
}
}
void
AutoJSAPI::ReportException()
{
MOZ_ASSERT(OwnsErrorReporting(), "This is not our exception to report!");
if (!HasException()) {
return;
}
// AutoJSAPI uses a JSAutoNullableCompartment, and may be in a null
// compartment when the destructor is called. However, the JS engine
// requires us to be in a compartment when we fetch the pending exception.
// In this case, we enter the privileged junk scope and don't dispatch any
// error events.
JS::Rooted<JSObject*> errorGlobal(cx(), JS::CurrentGlobalOrNull(cx()));
if (!errorGlobal)
errorGlobal = xpc::PrivilegedJunkScope();
JSAutoCompartment ac(cx(), errorGlobal);
nsCOMPtr<nsPIDOMWindow> win = xpc::WindowGlobalOrNull(errorGlobal);
JS::Rooted<JS::Value> exn(cx());
js::ErrorReport jsReport(cx());
if (StealException(&exn) && jsReport.init(cx(), exn)) {
nsRefPtr<xpc::ErrorReport> xpcReport = new xpc::ErrorReport();
xpcReport->Init(jsReport.report(), jsReport.message(),
nsContentUtils::IsCallerChrome(),
win ? win->WindowID() : 0);
if (win) {
DispatchScriptErrorEvent(win, JS_GetRuntime(cx()), xpcReport, exn);
} else {
xpcReport->LogToConsole();
}
} else {
NS_WARNING("OOMed while acquiring uncaught exception from JSAPI");
}
}
void
AutoJSAPI::ReportException()
{
MOZ_ASSERT(OwnsErrorReporting(), "This is not our exception to report!");
if (!HasException()) {
return;
}
// AutoJSAPI uses a JSAutoNullableCompartment, and may be in a null
// compartment when the destructor is called. However, the JS engine
// requires us to be in a compartment when we fetch the pending exception.
// In this case, we enter the privileged junk scope and don't dispatch any
// error events.
JS::Rooted<JSObject*> errorGlobal(cx(), JS::CurrentGlobalOrNull(cx()));
if (!errorGlobal) {
if (mIsMainThread) {
errorGlobal = xpc::PrivilegedJunkScope();
} else {
errorGlobal = workers::GetCurrentThreadWorkerGlobal();
}
}
JSAutoCompartment ac(cx(), errorGlobal);
JS::Rooted<JS::Value> exn(cx());
js::ErrorReport jsReport(cx());
if (StealException(&exn) && jsReport.init(cx(), exn)) {
if (mIsMainThread) {
RefPtr<xpc::ErrorReport> xpcReport = new xpc::ErrorReport();
RefPtr<nsGlobalWindow> win = xpc::WindowGlobalOrNull(errorGlobal);
nsPIDOMWindowInner* inner = win ? win->AsInner() : nullptr;
xpcReport->Init(jsReport.report(), jsReport.message(),
nsContentUtils::IsCallerChrome(),
inner ? inner->WindowID() : 0);
if (inner) {
DispatchScriptErrorEvent(inner, JS_GetRuntime(cx()), xpcReport, exn);
} else {
xpcReport->LogToConsole();
}
} else {
// On a worker, we just use the worker error reporting mechanism and don't
// bother with xpc::ErrorReport. This will ensure that all the right
// events (which are a lot more complicated than in the window case) get
// fired.
workers::WorkerPrivate* worker = workers::GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(worker);
MOZ_ASSERT(worker->GetJSContext() == cx());
// Before invoking ReportError, put the exception back on the context,
// because it may want to put it in its error events and has no other way
// to get hold of it. After we invoke ReportError, clear the exception on
// cx(), just in case ReportError didn't.
JS_SetPendingException(cx(), exn);
worker->ReportError(cx(), jsReport.message(), jsReport.report());
ClearException();
}
} else {
NS_WARNING("OOMed while acquiring uncaught exception from JSAPI");
ClearException();
}
}
AutoJSAPI::~AutoJSAPI()
{
if (mOwnErrorReporting) {
MOZ_ASSERT(NS_IsMainThread(), "See corresponding assertion in TakeOwnershipOfErrorReporting()");
JS::ContextOptionsRef(cx()).setDontReportUncaught(mOldDontReportUncaught);
if (HasException()) {
// AutoJSAPI uses a JSAutoNullableCompartment, and may be in a null
// compartment when the destructor is called. However, the JS engine
// requires us to be in a compartment when we fetch the pending exception.
// In this case, we enter the privileged junk scope and don't dispatch any
// error events.
JS::Rooted<JSObject*> errorGlobal(cx(), JS::CurrentGlobalOrNull(cx()));
if (!errorGlobal)
errorGlobal = xpc::PrivilegedJunkScope();
JSAutoCompartment ac(cx(), errorGlobal);
nsCOMPtr<nsPIDOMWindow> win = xpc::WindowGlobalOrNull(errorGlobal);
const char *category = nsContentUtils::IsCallerChrome() ? "chrome javascript"
: "content javascript";
JS::Rooted<JS::Value> exn(cx());
js::ErrorReport jsReport(cx());
if (StealException(&exn) && jsReport.init(cx(), exn)) {
nsRefPtr<xpc::ErrorReport> xpcReport = new xpc::ErrorReport();
xpcReport->Init(jsReport.report(), jsReport.message(), category,
win ? win->WindowID() : 0);
if (win) {
DispatchScriptErrorEvent(win, JS_GetRuntime(cx()), xpcReport, exn);
} else {
xpcReport->LogToConsole();
}
} else {
NS_WARNING("OOMed while acquiring uncaught exception from JSAPI");
}
}
}
if (mOldErrorReporter.isSome()) {
JS_SetErrorReporter(JS_GetRuntime(cx()), mOldErrorReporter.value());
}
}
void
AutoJSAPI::ReportException()
{
if (!HasException()) {
return;
}
// AutoJSAPI uses a JSAutoNullableCompartment, and may be in a null
// compartment when the destructor is called. However, the JS engine
// requires us to be in a compartment when we fetch the pending exception.
// In this case, we enter the privileged junk scope and don't dispatch any
// error events.
JS::Rooted<JSObject*> errorGlobal(cx(), JS::CurrentGlobalOrNull(cx()));
if (!errorGlobal) {
if (mIsMainThread) {
errorGlobal = xpc::PrivilegedJunkScope();
} else {
errorGlobal = workers::GetCurrentThreadWorkerGlobal();
}
}
JSAutoCompartment ac(cx(), errorGlobal);
JS::Rooted<JS::Value> exn(cx());
js::ErrorReport jsReport(cx());
if (StealException(&exn) &&
jsReport.init(cx(), exn, js::ErrorReport::WithSideEffects)) {
if (mIsMainThread) {
RefPtr<xpc::ErrorReport> xpcReport = new xpc::ErrorReport();
RefPtr<nsGlobalWindow> win = xpc::WindowGlobalOrNull(errorGlobal);
if (!win) {
// We run addons in a separate privileged compartment, but they still
// expect to trigger the onerror handler of their associated DOM Window.
win = xpc::AddonWindowOrNull(errorGlobal);
}
nsPIDOMWindowInner* inner = win ? win->AsInner() : nullptr;
xpcReport->Init(jsReport.report(), jsReport.toStringResult().c_str(),
nsContentUtils::IsCallerChrome(),
inner ? inner->WindowID() : 0);
if (inner && jsReport.report()->errorNumber != JSMSG_OUT_OF_MEMORY) {
JS::RootingContext* rcx = JS::RootingContext::get(cx());
DispatchScriptErrorEvent(inner, rcx, xpcReport, exn);
} else {
JS::Rooted<JSObject*> stack(cx(),
xpc::FindExceptionStackForConsoleReport(inner, exn));
xpcReport->LogToConsoleWithStack(stack);
}
} else {
// On a worker, we just use the worker error reporting mechanism and don't
// bother with xpc::ErrorReport. This will ensure that all the right
// events (which are a lot more complicated than in the window case) get
// fired.
workers::WorkerPrivate* worker = workers::GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(worker);
MOZ_ASSERT(worker->GetJSContext() == cx());
// Before invoking ReportError, put the exception back on the context,
// because it may want to put it in its error events and has no other way
// to get hold of it. After we invoke ReportError, clear the exception on
// cx(), just in case ReportError didn't.
JS_SetPendingException(cx(), exn);
worker->ReportError(cx(), jsReport.toStringResult(), jsReport.report());
ClearException();
}
} else {
NS_WARNING("OOMed while acquiring uncaught exception from JSAPI");
ClearException();
}
}
void X86AsmGenerator::pushRefHandler(){
//push var reference
int backTimes = -1;
SymbolTableItem *pushedVar = curSymbolTable->getItem(curMidCode.arg1, 0, backTimes);
int relativeAddr = -pushedVar->addr;
string rAddr = relativeAddr >= 0 ? "+" + intToString(relativeAddr) : intToString(relativeAddr);
if (pushedVar->isRef) {
if (backTimes == 0) {
genX86Asm("push DWORD ptr [ebp" + rAddr + "]");
} else if (backTimes > 0) {
setDynamicBaseAddrReg(backTimes);
genX86Asm("push DWORD ptr [ebx" + rAddr + "]");
} else {
//小于零错误,该错误应该在语义分析阶段就已经进行了处理.
}
} else {
if (pushedVar->symbolType == integersym || pushedVar->symbolType == charsym) {
if (backTimes == 0) {
genX86Asm("lea eax, [ebp" + rAddr + "]");
genX86Asm("push eax");
} else if (backTimes > 0) {
setDynamicBaseAddrReg(backTimes);
genX86Asm("lea eax, [ebx" + rAddr + "]");
genX86Asm("push eax");
} else {
}
}else if (pushedVar->symbolType == arrayInteger || pushedVar->symbolType == arrayChar) {
backTimes = -1;
SymbolTableItem *arr = curSymbolTable->getItem(curMidCode.arg1, 0, backTimes);
int itemSize = 0;
if (arr->symbolType == arrayInteger) {
itemSize = INTEGER_SIZE;
}else if (arr->symbolType == arrayChar) {
itemSize = CHAR_SIZE;
}else {
errorGlobal(WAIT_FOR_DEFINE);
}
if (backTimes == 0) {
genX86Asm("pop ecx"); //offset
genX86Asm("imul ecx, ecx, " + intToString(itemSize)); //offset*itemsize
genX86Asm("mov ebx, ebp");
genX86Asm("sub ebx, " + intToString(arr->addr));
genX86Asm("sub ebx, ecx");
genX86Asm("push ebx");
} else if (backTimes > 0) {
setDynamicBaseAddrReg(backTimes);
genX86Asm("pop ecx"); //offset
genX86Asm("imul ecx, ecx, " + intToString(itemSize)); //offset*itemsize
genX86Asm("sub ebx, " + intToString(arr->addr));
genX86Asm("sub ebx, ecx");
genX86Asm("push ebx");
} else {
}
}
}
}
