Bug 1649603 Comment 0 Edit History

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Original comment by

Beth Rennie [:beth] (she/her)

on 2020-06-30 14:32:18 PDT

+++ This bug was initially created as a clone of Bug #1649601 +++

According to [this startup profile](https://profiler.firefox.com/public/d98453450a6af863afe97dd16ba14e40d885e317/marker-table/?file=profile_startup_about_home_paint%2Fstartup%2Fcycle_0.profile&globalTrackOrder=3-0-1-2&localTrackOrderByPid=15549-2-3-0-1~15626-1-0~15607-1-0~&markerSearch=osfile&thread=0&v=4), ExtensionsSettingStore.jsm runs during startup and imports osfile.jsm. We should migrate this to the new IOUtils replacement for osfile.jsm when possible.

Stack:
```
(root) []
XREMain::XRE_main []
XREMain::XRE_main(int, char**, mozilla::BootstrapConfig const&) [libxul.so]
XREMain::XRE_mainRun() [libxul.so]
nsAppStartup::Run() [libxul.so]
nsBaseAppShell::Run() [libxul.so]
MessageLoop::Run() [libxul.so]
mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) [libxul.so]
nsThread::ProcessNextEvent(bool, bool*) [libxul.so]
mozilla::CycleCollectedJSContext::AfterProcessTask(unsigned int) [libxul.so]
promise callback []
mozilla::PromiseJobRunnable::Run(mozilla::AutoSlowOperation&) [libxul.so]
mozilla::dom::PromiseJobCallback::Call(mozilla::dom::BindingCallContext&, JS::Handle<JS::Value>, mozilla::ErrorResult&) [libxul.so]
JS::Call(JSContext*, JS::Handle<JS::Value>, JS::Handle<JS::Value>, JS::HandleValueArray const&, JS::MutableHandle<JS::Value>) [libxul.so]
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
PromiseReactionJob(JSContext*, unsigned int, JS::Value*) [libxul.so]
AsyncFunctionResume(JSContext*, JS::Handle<js::AsyncFunctionGeneratorObject*>, ResumeKind, JS::Handle<JS::Value>) [libxul.so]
js::CallSelfHostedFunction(JSContext*, JS::Handle<js::PropertyName*>, JS::Handle<JS::Value>, js::AnyInvokeArgs const&, JS::MutableHandle<JS::Value>) [libxul.so]
js::Call(JSContext*, JS::Handle<JS::Value>, JS::Handle<JS::Value>, js::AnyInvokeArgs const&, JS::MutableHandle<JS::Value>, js::CallReason) [libxul.so]
js::RunScript []
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
AsyncFunctionNext [self-hosted:688:26]
asyncEmitManifestEntry [resource://gre/modules/ExtensionCommon.jsm:1542:30]
0xff4eaa5dbc7 []
js::jit::DoCallFallback(JSContext*, js::jit::BaselineFrame*, js::jit::ICCall_Fallback*, unsigned int, JS::Value*, JS::MutableHandle<JS::Value>) [libxul.so]
js::RunScript []
onManifestEntry [chrome://browser/content/parent/ext-commands.js:20:23]
loadCommands [resource://gre/modules/ExtensionShortcuts.jsm:165:14]
loadCommands/this.commands< [resource://gre/modules/ExtensionShortcuts.jsm:171:27]
loadCommandsFromStorage [resource://gre/modules/ExtensionShortcuts.jsm:256:31]
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
Interpret(JSContext*, js::RunState&) [libxul.so]
js::NativeGetExistingProperty(JSContext*, JS::Handle<JSObject*>, JS::Handle<js::NativeObject*>, JS::Handle<js::Shape*>, JS::MutableHandle<JS::Value>) [libxul.so]
js::CallGetter(JSContext*, JS::Handle<JS::Value>, JS::Handle<JS::Value>, JS::MutableHandle<JS::Value>) [libxul.so]
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
mozilla::dom::module_getter::ModuleGetter(JSContext*, unsigned int, JS::Value*) [libxul.so]
mozJSComponentLoader::Import(JSContext*, nsTSubstring<char> const&, JS::MutableHandle<JSObject*>, JS::MutableHandle<JSObject*>, bool) [libxul.so]
component loader load module []
mozJSComponentLoader::ObjectForLocation(ComponentLoaderInfo&, nsIFile*, JS::MutableHandle<JSObject*>, JS::MutableHandle<JSScript*>, char**, bool, JS::MutableHandle<JS::Value>) [libxul.so]
js::ExecuteInJSMEnvironment(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>) [libxul.so]
js::ExecuteInJSMEnvironment(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>, JS::Handle<JS::StackGCVector<JSObject*, js::TempAllocPolicy> >) [libxul.so]
ExecuteInExtensibleLexicalEnvironment(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>) [libxul.so]
js::RunScript []
> resource://gre/modules/ExtensionSettingsStore.jsm []
js::ExecuteKernel(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>, JS::Handle<JS::Value>, js::AbstractFramePtr, JS::MutableHandle<JS::Value>) [libxul.so]
Interpret(JSContext*, js::RunState&) [libxul.so]
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
ChromeUtils.import []
mozilla::dom::ChromeUtils_Binding::import(JSContext*, unsigned int, JS::Value*) [libxul.so]
> ChromeUtils::Import resource://gre/modules/osfile.jsm []
mozilla::dom::ChromeUtils::Import(mozilla::dom::GlobalObject const&, nsTSubstring<char16_t> const&, mozilla::dom::Optional<JS::Handle<JSObject*> > const&, JS::MutableHandle<JSObject*>, mozilla::ErrorResult&) [libxul.so]
mozJSComponentLoader::Import(JSContext*, nsTSubstring<char> const&, JS::MutableHandle<JSObject*>, JS::MutableHandle<JSObject*>, bool) [libxul.so]
profiler_get_backtrace() [libxul.so]
Registers::SyncPopulate() [libxul.so]
```

Revision 1 by

Beth Rennie [:beth] (she/her)

on 2020-06-30 14:32:43 PDT

According to [this startup profile](https://profiler.firefox.com/public/d98453450a6af863afe97dd16ba14e40d885e317/marker-table/?file=profile_startup_about_home_paint%2Fstartup%2Fcycle_0.profile&globalTrackOrder=3-0-1-2&localTrackOrderByPid=15549-2-3-0-1~15626-1-0~15607-1-0~&markerSearch=osfile&thread=0&v=4), ExtensionsSettingStore.jsm runs during startup and imports osfile.jsm. We should migrate this to the new IOUtils replacement for osfile.jsm when possible.

Stack:
```
(root) []
XREMain::XRE_main []
XREMain::XRE_main(int, char**, mozilla::BootstrapConfig const&) [libxul.so]
XREMain::XRE_mainRun() [libxul.so]
nsAppStartup::Run() [libxul.so]
nsBaseAppShell::Run() [libxul.so]
MessageLoop::Run() [libxul.so]
mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) [libxul.so]
nsThread::ProcessNextEvent(bool, bool*) [libxul.so]
mozilla::CycleCollectedJSContext::AfterProcessTask(unsigned int) [libxul.so]
promise callback []
mozilla::PromiseJobRunnable::Run(mozilla::AutoSlowOperation&) [libxul.so]
mozilla::dom::PromiseJobCallback::Call(mozilla::dom::BindingCallContext&, JS::Handle<JS::Value>, mozilla::ErrorResult&) [libxul.so]
JS::Call(JSContext*, JS::Handle<JS::Value>, JS::Handle<JS::Value>, JS::HandleValueArray const&, JS::MutableHandle<JS::Value>) [libxul.so]
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
PromiseReactionJob(JSContext*, unsigned int, JS::Value*) [libxul.so]
AsyncFunctionResume(JSContext*, JS::Handle<js::AsyncFunctionGeneratorObject*>, ResumeKind, JS::Handle<JS::Value>) [libxul.so]
js::CallSelfHostedFunction(JSContext*, JS::Handle<js::PropertyName*>, JS::Handle<JS::Value>, js::AnyInvokeArgs const&, JS::MutableHandle<JS::Value>) [libxul.so]
js::Call(JSContext*, JS::Handle<JS::Value>, JS::Handle<JS::Value>, js::AnyInvokeArgs const&, JS::MutableHandle<JS::Value>, js::CallReason) [libxul.so]
js::RunScript []
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
AsyncFunctionNext [self-hosted:688:26]
asyncEmitManifestEntry [resource://gre/modules/ExtensionCommon.jsm:1542:30]
0xff4eaa5dbc7 []
js::jit::DoCallFallback(JSContext*, js::jit::BaselineFrame*, js::jit::ICCall_Fallback*, unsigned int, JS::Value*, JS::MutableHandle<JS::Value>) [libxul.so]
js::RunScript []
onManifestEntry [chrome://browser/content/parent/ext-commands.js:20:23]
loadCommands [resource://gre/modules/ExtensionShortcuts.jsm:165:14]
loadCommands/this.commands< [resource://gre/modules/ExtensionShortcuts.jsm:171:27]
loadCommandsFromStorage [resource://gre/modules/ExtensionShortcuts.jsm:256:31]
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
Interpret(JSContext*, js::RunState&) [libxul.so]
js::NativeGetExistingProperty(JSContext*, JS::Handle<JSObject*>, JS::Handle<js::NativeObject*>, JS::Handle<js::Shape*>, JS::MutableHandle<JS::Value>) [libxul.so]
js::CallGetter(JSContext*, JS::Handle<JS::Value>, JS::Handle<JS::Value>, JS::MutableHandle<JS::Value>) [libxul.so]
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
mozilla::dom::module_getter::ModuleGetter(JSContext*, unsigned int, JS::Value*) [libxul.so]
mozJSComponentLoader::Import(JSContext*, nsTSubstring<char> const&, JS::MutableHandle<JSObject*>, JS::MutableHandle<JSObject*>, bool) [libxul.so]
component loader load module []
mozJSComponentLoader::ObjectForLocation(ComponentLoaderInfo&, nsIFile*, JS::MutableHandle<JSObject*>, JS::MutableHandle<JSScript*>, char**, bool, JS::MutableHandle<JS::Value>) [libxul.so]
js::ExecuteInJSMEnvironment(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>) [libxul.so]
js::ExecuteInJSMEnvironment(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>, JS::Handle<JS::StackGCVector<JSObject*, js::TempAllocPolicy> >) [libxul.so]
ExecuteInExtensibleLexicalEnvironment(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>) [libxul.so]
js::RunScript []
> resource://gre/modules/ExtensionSettingsStore.jsm []
js::ExecuteKernel(JSContext*, JS::Handle<JSScript*>, JS::Handle<JSObject*>, JS::Handle<JS::Value>, js::AbstractFramePtr, JS::MutableHandle<JS::Value>) [libxul.so]
Interpret(JSContext*, js::RunState&) [libxul.so]
js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) [libxul.so]
ChromeUtils.import []
mozilla::dom::ChromeUtils_Binding::import(JSContext*, unsigned int, JS::Value*) [libxul.so]
> ChromeUtils::Import resource://gre/modules/osfile.jsm []
mozilla::dom::ChromeUtils::Import(mozilla::dom::GlobalObject const&, nsTSubstring<char16_t> const&, mozilla::dom::Optional<JS::Handle<JSObject*> > const&, JS::MutableHandle<JSObject*>, mozilla::ErrorResult&) [libxul.so]
mozJSComponentLoader::Import(JSContext*, nsTSubstring<char> const&, JS::MutableHandle<JSObject*>, JS::MutableHandle<JSObject*>, bool) [libxul.so]
profiler_get_backtrace() [libxul.so]
Registers::SyncPopulate() [libxul.so]
```

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