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Make check for valid resumption value a bit more legible.

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This commit is contained in:
Jim Blandy 2011-05-23 15:01:24 -07:00
parent fd054f5c39
commit 041108b07b
1 changed files with 13 additions and 7 deletions
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20
js/src/jsdbg.cpp
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@ -392,13 +392,19 @@ Debug::parseResumptionValue(AutoCompartment &ac, bool ok, const Value &rv, Value
const Shape *shape;
jsid returnId = ATOM_TO_JSID(cx->runtime->atomState.returnAtom);
jsid throwId = ATOM_TO_JSID(cx->runtime->atomState.throwAtom);
if (!rv.isObject() ||
!(obj = &rv.toObject())->isObject() ||
!(shape = obj->lastProperty())->previous() ||
shape->previous()->previous() ||
(shape->propid != returnId && shape->propid != throwId) ||
!shape->isDataDescriptor())
{
bool okResumption = rv.isObject();
if (okResumption) {
obj = &rv.toObject();
okResumption = obj->isObject();
}
if (okResumption) {
shape = obj->lastProperty();
okResumption = shape->previous() &&
!shape->previous()->previous() &&
(shape->propid == returnId || shape->propid == throwId) &&
shape->isDataDescriptor();
}
if (!okResumption) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEBUG_BAD_RESUMPTION);
return handleUncaughtException(ac, vp, callHook);
}