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Bug 1181619. Make sure we've entered a microtask before we call nsJSUtils::EvaluateString, and put those microtasks outside the relevant AutoEntryScripts so we report any possible exceptions before doing the microtask checkpoint. r=bholley

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This commit is contained in:
Boris Zbarsky 2015-07-09 02:41:43 -04:00
parent de55ddcd67
commit 7d8173071e
7 changed files with 21 additions and 1 deletions
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14
dom/base/crashtests/1181619.html Normal file
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@ -0,0 +1,14 @@
<!DOCTYPE html>
<body>
<script>
var obs = new MutationObserver(function() {
// Just need something here to assert exception is not pending. Any
// binding method will do.
console.log("hello");
});
obs.observe(document.body, { childList: true });
</script>
<script>
noSuchMethodYo();
</script>
</body>

1
dom/base/crashtests/crashtests.list
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@ -203,3 +203,4 @@ load xhr_html_nullresponse.html
load structured_clone_container_throws.html
load 1154598.xhtml
load 1157995.html
load 1181619.html

1
dom/base/nsGlobalWindow.cpp
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@ -12014,6 +12014,7 @@ nsGlobalWindow::RunTimeoutHandler(nsTimeout* aTimeout,
// New script entry point required, due to the "Create a script" sub-step of
// http://www.whatwg.org/specs/web-apps/current-work/#timer-initialisation-steps
nsAutoMicroTask mt;
AutoEntryScript entryScript(this, reason, true, aScx->GetNativeContext());
entryScript.TakeOwnershipOfErrorReporting();
JS::CompileOptions options(entryScript.cx());

3
dom/base/nsJSUtils.cpp
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@ -174,6 +174,8 @@ nsJSUtils::EvaluateString(JSContext* aCx,
MOZ_ASSERT(js::GetGlobalForObjectCrossCompartment(aEvaluationGlobal) ==
aEvaluationGlobal);
MOZ_ASSERT_IF(aOffThreadToken, aCompileOptions.noScriptRval);
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(nsContentUtils::IsInMicroTask());
// Unfortunately, the JS engine actually compiles scripts with a return value
// in a different, less efficient way. Furthermore, it can't JIT them in many
@ -183,7 +185,6 @@ nsJSUtils::EvaluateString(JSContext* aCx,
// aCompileOptions.noScriptRval set to true.
aRetValue.setUndefined();
nsAutoMicroTask mt;
nsresult rv = NS_OK;
nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();

1
dom/base/nsScriptLoader.cpp
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@ -1113,6 +1113,7 @@ nsScriptLoader::EvaluateScript(nsScriptLoadRequest* aRequest,
// New script entry point required, due to the "Create a script" sub-step of
// http://www.whatwg.org/specs/web-apps/current-work/#execute-the-script-block
nsAutoMicroTask mt;
AutoEntryScript entryScript(globalObject, "<script> element", true,
context->GetNativeContext());
entryScript.TakeOwnershipOfErrorReporting();

1
dom/jsurl/nsJSProtocolHandler.cpp
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@ -250,6 +250,7 @@ nsresult nsJSThunk::EvaluateScript(nsIChannel *aChannel,
// New script entry point required, due to the "Create a script" step of
// http://www.whatwg.org/specs/web-apps/current-work/#javascript-protocol
nsAutoMicroTask mt;
AutoEntryScript entryScript(innerGlobal, "javascript: URI", true,
scriptContext->GetNativeContext());
// We want to make sure we report any exceptions that happen before we

1
dom/plugins/base/nsNPAPIPlugin.cpp
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@ -1479,6 +1479,7 @@ _evaluate(NPP npp, NPObject* npobj, NPString *script, NPVariant *result)
return false;
}
nsAutoMicroTask mt;
dom::AutoEntryScript aes(win, "NPAPI NPN_evaluate");
aes.TakeOwnershipOfErrorReporting();
JSContext* cx = aes.cx();