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ircd::js: Fix pending exception propagation on interleaving stack.

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This commit is contained in:
Jason Volk 2016-11-10 12:19:37 -08:00
parent c558df48bc
commit a44e6f701f
2 changed files with 34 additions and 4 deletions
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2
include/ircd/js/error.h
View file

@ -44,6 +44,8 @@ struct jserror
jserror(generate_skip_t);
jserror(const JSErrorReport &);
jserror(const char *fmt = " ", ...) AFP(2, 3);
jserror(JSObject &);
jserror(JSObject *const &);
jserror(const JS::Value &);
};

36
ircd/js.cc
View file

@ -1685,6 +1685,18 @@ ircd::js::jserror::jserror(const JS::Value &val)
{
}
ircd::js::jserror::jserror(JSObject *const &obj)
:ircd::js::error{generate_skip}
,val{obj? JS::ObjectValue(*obj) : JS::UndefinedValue() }
{
}
ircd::js::jserror::jserror(JSObject &obj)
:ircd::js::error{generate_skip}
,val{JS::ObjectValue(obj)}
{
}
ircd::js::jserror::jserror(generate_skip_t)
:ircd::js::error(generate_skip)
,val{}
@ -1759,7 +1771,8 @@ void
ircd::js::jserror::set_pending()
const
{
JS_SetPendingException(*cx, value(val));
JS_SetPendingException(*cx, &val);
save_exception(*cx, *JS_ErrorFromException(*cx, object(val.get())));
}
void
@ -1819,6 +1832,14 @@ ircd::js::jserror::create(JSErrorReport &report)
throw error("Failed to construct jserror exception!");
}
JS::Rooted<JSObject *> obj(*cx);
if(unlikely(!JS_ValueToObject(*cx, &val, &obj)))
throw error("Failed to convert value to object on exception!");
JS::Rooted<JS::Value> msgv(*cx, JS::StringValue(msg));
if(unlikely(!JS_SetProperty(*cx, obj, "message", msgv)))
throw error("Failed to set jserror.message property on exception!");
generate_what_our(report);
}
@ -2553,7 +2574,11 @@ ircd::js::save_exception(context &c,
const JSErrorReport &report)
{
if(c.except)
throw error("(internal error): Won't overwrite saved exception");
{
//throw error("(internal error): Won't overwrite saved exception");
log.warning("save_exception(): Dropping unrestored exception @ %p", (const void *)c.except);
JS_DropExceptionState(*cx, c.except);
}
c.except = JS_SaveExceptionState(c),
c.report = report;
@ -2993,17 +3018,20 @@ ircd::js::runtime::handle_error(JSContext *const ctx,
noexcept
{
assert(report);
/*
log.debug("JSContext(%p) Error report: %s [%s]",
(const void *)ctx,
msg,
debug(*report).c_str());
*/
/*
log.critical("Unhandled: JSContext(%p): %s [%s]",
(const void *)ctx,
msg,
debug(*report).c_str());
*/
//TODO: warnings
if(!JSREPORT_IS_EXCEPTION(report->flags))
return;
save_exception(our(ctx), *report);
}