Bug 220868 – REGRESSION (r271731): Unchecked JS exception under GlobalObject::moduleLoaderFetch

• Status: RESOLVED
• Resolution: FIXED
• Component: JavaScriptCore

[Ryan Haddad]

After https://trac.webkit.org/changeset/271731/webkit landed, the debug JSC bot has thousands of test failing with the following:

ERROR: Unchecked JS exception:
    This scope can throw a JS exception: resolve @ ./runtime/JSPromise.cpp:162
        (ExceptionScope::m_recursionDepth was 13)
    But the exception was unchecked as of this scope: moduleLoaderFetch @ /Volumes/Data/slave/catalina-debug/build/Source/JavaScriptCore/jsc.cpp:1184
        (ExceptionScope::m_recursionDepth was 12)

Unchecked exception detected at:
    1   0x10796343e JSC::VM::verifyExceptionCheckNeedIsSatisfied(unsigned int, JSC::ExceptionEventLocation&)
    2   0x10752de11 JSC::CatchScope::~CatchScope()
    3   0x10752db65 JSC::CatchScope::~CatchScope()
    4   0x105b17bf3 GlobalObject::moduleLoaderFetch(JSC::JSGlobalObject*, JSC::JSModuleLoader*, JSC::JSValue, JSC::JSValue, JSC::JSValue)
    5   0x1077755b5 JSC::JSModuleLoader::fetch(JSC::JSGlobalObject*, JSC::JSValue, JSC::JSValue, JSC::JSValue)
    6   0x10777b51d JSC::moduleLoaderFetch(JSC::JSGlobalObject*, JSC::CallFrame*)
    7   0x5af48d801178
    8   0x1062f4eb2 llint_entry
    9   0x1062f4eb2 llint_entry
    10  0x1062f4eb2 llint_entry
    11  0x1062f4eb2 llint_entry
    12  0x1062f4eb2 llint_entry
    13  0x1062f4eb2 llint_entry
    14  0x1062d3740 vmEntryToJavaScript
    15  0x1071bfefb JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
    16  0x1071c06b7 JSC::Interpreter::executeCall(JSC::JSGlobalObject*, JSC::JSObject*, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
    17  0x10752d90d JSC::call(JSC::JSGlobalObject*, JSC::JSValue, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
    18  0x107774a22 JSC::JSModuleLoader::requestImportModule(JSC::JSGlobalObject*, JSC::Identifier const&, JSC::JSValue, JSC::JSValue)
    19  0x1075a5495 JSC::importModule(JSC::JSGlobalObject*, JSC::Identifier const&, JSC::JSValue, JSC::JSValue)
    20  0x105b170df GlobalObject::moduleLoaderImportModule(JSC::JSGlobalObject*, JSC::JSModuleLoader*, JSC::JSString*, JSC::JSValue, JSC::SourceOrigin const&)
    21  0x107774c0f JSC::JSModuleLoader::importModule(JSC::JSGlobalObject*, JSC::JSString*, JSC::JSValue, JSC::SourceOrigin const&)
    22  0x107711830 JSC::globalFuncImportModule(JSC::JSGlobalObject*, JSC::CallFrame*)
    23  0x5af48d801178
    24  0x1062f4eb2 llint_entry
    25  0x1062d3740 vmEntryToJavaScript
    26  0x1071bfefb JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
    27  0x1071bf452 JSC::Interpreter::executeProgram(JSC::SourceCode const&, JSC::JSGlobalObject*, JSC::JSObject*)
    28  0x1075a43b7 JSC::evaluate(JSC::JSGlobalObject*, JSC::SourceCode const&, JSC::JSValue, WTF::NakedPtr<JSC::Exception>&)
    29  0x105b8dab3 runWithOptions(GlobalObject*, CommandLine&, bool&)
    30  0x105b491ea jscmain(int, char**)::$_10::operator()(JSC::VM&, GlobalObject*, bool&) const
    31  0x105b1d7a3 int runJSC<jscmain(int, char**)::$_10>(CommandLine const&, bool, jscmain(int, char**)::$_10 const&)
    32  0x105b1b1f2 jscmain(int, char**)
    33  0x105b1af2e main
    34  0x7fff6e98ecc9 start


https://build.webkit.org/builders/Apple-Catalina-Debug-JSC-Tests/builds/2224/steps/jscore-test/logs/stdio

[Radar WebKit Bug Importer]

<rdar://problem/73506709>

[Yusuke Suzuki]

Created attachment 418179 [details]
Patch

[Mark Lam]

Comment on attachment 418179 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=418179&action=review

r=me

> Source/JavaScriptCore/wasm/js/JSWebAssembly.cpp:244
> +            JSC::instantiate(vm, globalObject, promise, module, importObject, moduleKey, resolveKind, creationMode);

I think we don't need this JSC:: qualifier.

[Yusuke Suzuki]

Comment on attachment 418179 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=418179&action=review

>> Source/JavaScriptCore/wasm/js/JSWebAssembly.cpp:244
>> +            JSC::instantiate(vm, globalObject, promise, module, importObject, moduleKey, resolveKind, creationMode);
> 
> I think we don't need this JSC:: qualifier.

Removed

[Yusuke Suzuki]

Committed r271766: <https://trac.webkit.org/changeset/271766>