922102 - unreported memory in nsSupportsStringImpl

Status: NEW

(Core :: DOM: Core & HTML, defect, P5)

Description

[Nathan Froyd [:froydnj]]

Seen on fresh startup; hard to see where the *actual* problem is because DMD doesn't trace far enough back in the stack.  I think this might be related to session (re)store; I have a lot of open tabs.  But it's a pretty big chunk of memory, so worth reporting.

Unreported: 1 block in stack trace record 2 of 5,590
 10,600,448 bytes (10,596,950 requested / 3,498 slop)
 2.39% of the heap (5.99% cumulative);  7.93% of unreported (19.91% cumulative)
 Allocated at
   replace_malloc (/home/froydnj/src/mozilla-central-official/memory/replace/dmd/DMD.cpp:1227) 0x7fdcb0f20f44
   nsStringBuffer::Alloc(unsigned long) (/home/froydnj/src/mozilla-central-official/xpcom/string/src/nsSubstring.cpp:183) 0x7fdcadb3ebd3
   nsAString_internal::MutatePrep(unsigned int, unsigned short**, unsigned int*) (/home/froydnj/src/mozilla-central-official/xpcom/string/src/nsTSubstring.cpp:132) 0x7fdcadb3edfb
   nsAString_internal::ReplacePrepInternal(unsigned int, unsigned int, unsigned int, unsigned int) (/home/froydnj/src/mozilla-central-official/xpcom/string/src/nsTSubstring.cpp:168) 0x7fdcadb3ee3e
   nsAString_internal::Assign(unsigned short const*, unsigned int, mozilla::fallible_t const&) (/home/froydnj/src/mozilla-central-official/xpcom/string/src/nsTSubstring.cpp:319) 0x7fdcadb3f2b2
   nsAString_internal::Assign(nsAString_internal const&, mozilla::fallible_t const&) (/home/froydnj/src/mozilla-central-official/xpcom/string/src/nsTSubstring.cpp:394) 0x7fdcadb3f1ec
   nsAString_internal::Assign(nsAString_internal const&) (/home/froydnj/src/mozilla-central-official/xpcom/string/src/nsTSubstring.cpp:355) 0x7fdcadb3f62c
   nsSupportsStringImpl::SetData(nsAString_internal const&) (/home/froydnj/src/mozilla-central-official/xpcom/ds/nsSupportsPrimitives.cpp:140) 0x7fdcadb0a2bf
   NS_InvokeByIndex (/home/froydnj/src/mozilla-central-official/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_x86_64_unix.cpp:164) 0x7fdcadb38b23
   CallMethodHelper::Invoke() (/home/froydnj/src/mozilla-central-official/js/xpconnect/src/XPCWrappedNative.cpp:2804) 0x7fdcad5964aa
   XPC_WN_GetterSetter(JSContext*, unsigned int, JS::Value*) (/home/froydnj/src/mozilla-central-official/js/xpconnect/src/XPCWrappedNativeJSOps.cpp:1335) 0x7fdcad599fa0
   CallJSNative (/home/froydnj/src/mozilla-central-official/js/src/jscntxtinlines.h:218) 0x7fdcae140653
   js::Invoke(JSContext*, JS::Value const&, JS::Value const&, unsigned int, JS::Value*, JS::MutableHandle<JS::Value>) (/home/froydnj/src/mozilla-central-official/js/src/vm/Interpreter.cpp:512) 0x7fdcae1425cd
   js::InvokeGetterOrSetter(JSContext*, JSObject*, JS::Value, unsigned int, JS::Value*, JS::MutableHandle<JS::Value>) (/home/froydnj/src/mozilla-central-official/js/src/vm/Interpreter.cpp:584) 0x7fdcae1426fd
   js_NativeSet(JSContext*, JS::Handle<JSObject*>, JS::Handle<JSObject*>, JS::Handle<js::Shape*>, bool, JS::MutableHandle<JS::Value>) (/home/froydnj/src/mozilla-central-official/js/src/jsobj.cpp:4113) 0x7fdcae28a054
   js::baseops::SetPropertyHelper(JSContext*, JS::Handle<JSObject*>, JS::Handle<JSObject*>, JS::Handle<long>, unsigned int, JS::MutableHandle<JS::Value>, bool) (/home/froydnj/src/mozilla-central-official/js/src/jsobj.cpp:4717) 0x7fdcae28ed59
   SetPropertyOperation (/home/froydnj/src/mozilla-central-official/js/src/vm/Interpreter.cpp:338) 0x7fdcae136843
   RunScript (/home/froydnj/src/mozilla-central-official/js/src/vm/Interpreter.cpp:419) 0x7fdcae1402c6
   RunScript (/home/froydnj/src/mozilla-central-official/js/src/vm/Interpreter.cpp:388) 0x7fdcae140587
   js::CallOrConstructBoundFunction(JSContext*, unsigned int, JS::Value*) (/home/froydnj/src/mozilla-central-official/js/src/jsfun.cpp:1254) 0x7fdcae24b88e
   CallJSNative (/home/froydnj/src/mozilla-central-official/js/src/jscntxtinlines.h:218) 0x7fdcae140653
   js::Invoke(JSContext*, JS::Value const&, JS::Value const&, unsigned int, JS::Value*, JS::MutableHandle<JS::Value>) (/home/froydnj/src/mozilla-central-official/js/src/vm/Interpreter.cpp:512) 0x7fdcae1425cd
   js::DirectProxyHandler::call(JSContext*, JS::Handle<JSObject*>, JS::CallArgs const&) (/home/froydnj/src/mozilla-central-official/js/src/jsproxy.cpp:451) 0x7fdcae2ada18
   js::CrossCompartmentWrapper::call(JSContext*, JS::Handle<JSObject*>, JS::CallArgs const&) (/home/froydnj/src/mozilla-central-official/js/src/jswrapper.cpp:454) 0x7fdcae2fa26f

Comment 1

[Boris Zbarsky [:bzbarsky]]

Clearly needs a JS stack.  :(

Comment 2

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1472046

Move all DOM bugs that haven't been updated in more than 3 years and has no one currently assigned to P5.

If you have questions, please contact :mdaly.