601490 - Firefox hangs. Sample from Activity Monitor included.

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[Max]

User-Agent:       Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:2.0b6) Gecko/20100101 Firefox/4.0b6
Build Identifier: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:2.0b6) Gecko/20100101 Firefox/4.0b6

Often I'm reading a website and suddenly the page won't scroll, as if the page isn't entirely loaded, but the scroll bar shows lots more below. Then the spinning "app not responding" ball appears. FF won't respond to anything, and I have to Force Quit.

I disabled Flash because it was implicated in earlier occurrences, but FF still hangs. I have disabled all extensions except AdBlock and those from mozilla. 

Attached is a sample from Activity Monitor with the hopes that someone can see what's happening. This could probably be attached to another bug, but it's definitely critical because it makes FF unusable and the tabs aren't repopulated after restart.

Reproducible: Sometimes

Steps to Reproduce:
Try to scroll webpage.

No apparent immediate cause; user is reading a webpage that appears fully loaded. No particular website (but often NYTimes, because I read it a lot). 
Actual Results:  
FF hangs.

Expected Results:  
Page scrolls down.

Sampling process 1392 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling firefox-bin (pid 1392) every 1 millisecond
Call graph:
    755 Thread_2507
      228 XRE_AddStaticComponent
        227 XRE_AddStaticComponent
        1 PR_GetCurrentThread
          1 pthread_getspecific
            1 pthread_getspecific
      127 mozilla::scache::NS_NewBufferFromStorageStream(nsIStorageStream*, char**, unsigned int*)
        121 mozilla::scache::NS_NewBufferFromStorageStream(nsIStorageStream*, char**, unsigned int*)
        2 calloc
          2 malloc_zone_calloc
            1 malloc_zone_calloc
            1 szone_calloc
              1 tiny_malloc_from_free_list
                1 tiny_malloc_from_free_list
        1 JS_ObjectIsFunction
          1 JS_ObjectIsFunction
        1 __memcpy
          1 __memcpy
        1 free
          1 szone_free
            1 tiny_free_list_add_ptr
              1 tiny_free_list_add_ptr
        1 mozilla::scache::NS_NewBufferFromStorageStream(nsIStorageStream*, char**, unsigned int*)
          1 mozilla::scache::NS_NewBufferFromStorageStream(nsIStorageStream*, char**, unsigned int*)
      126 DumpJSValue
        89 DumpJSValue
        7 NS_InvokeByIndex_P
          5 NS_InvokeByIndex_P
          2 NS_GetXPTCallStub_P
            2 NS_GetXPTCallStub_P
        6 PR_ExitMonitor
          3 PR_ExitMonitor
          2 PR_Unlock
            2 pthread_mutex_unlock
              2 pthread_mutex_unlock
          1 pthread_self
            1 pthread_self
        6 free
          3 szone_size
            3 szone_size
          2 szone_free
            2 szone_free
          1 __spin_lock
            1 __spin_lock
        5 PR_EnterMonitor
          2 PR_Lock
            2 pthread_mutex_lock
              2 pthread_mutex_lock
          1 PR_EnterMonitor
          1 pthread_equal
            1 pthread_equal
          1 pthread_self
            1 pthread_self
        4 mozilla::scache::NS_NewBufferFromStorageStream(nsIStorageStream*, char**, unsigned int*)
          4 mozilla::scache::NS_NewBufferFromStorageStream(nsIStorageStream*, char**, unsigned int*)
        2 NS_StringSetDataRange_P
          2 NS_StringSetDataRange_P
        1 JS_IsExceptionPending
          1 JS_IsExceptionPending
        1 PR_Lock
          1 pthread_mutex_lock
            1 pthread_mutex_lock
        1 dyld_stub_free
          1 dyld_stub_free
        1 js_fgets(char*, int, __sFILE*)
          1 js_fgets(char*, int, __sFILE*)
        1 nsPrintSession::Release()
          1 nsPrintSession::Release()
        1 objc_exception_try_exit
          1 objc_exception_try_exit
        1 pthread_self
          1 pthread_self
      87 JS_HashTableRemove
        59 JS_HashTableRemove
          59 JS_HashTableRemove
        15 JS_HashTableRemove
        4 JS_sprintf_append
          4 JS_sprintf_append
        4 js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
          3 js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
          1 js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
            1 js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
        2 __memcpy
          2 __memcpy
        1 __bzero
          1 __bzero
        1 js_CloneDensePrimitiveArray(JSContext*, JSObject*, JSObject**)
          1 js_CloneDensePrimitiveArray(JSContext*, JSObject*, JSObject**)
        1 js_IsDensePrimitiveArray(JSObject*)
          1 js_IsDensePrimitiveArray(JSObject*)
      21 0x0
        18 DumpJSValue
          18 DumpJSValue
        2 NS_InvokeByIndex_P
          2 NS_InvokeByIndex_P
        1 PR_Now
          1 PR_Now
      18 JS_sprintf_append
        16 JS_sprintf_append
        1 PR_Unlock
          1 __spin_lock
            1 __spin_lock
        1 js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
          1 js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
      15 nsPrintSession::Release()
        12 nsPrintSession::Release()
        2 __memcpy
          2 __memcpy
        1 malloc
          1 malloc_zone_malloc
            1 szone_malloc
              1 szone_malloc
      11 0x3
        11 DumpJSValue
          11 DumpJSValue
      11 NS_InvokeByIndex_P
        9 NS_InvokeByIndex_P
        1 dyld_stub_PR_AtomicDecrement
          1 dyld_stub_PR_AtomicDecrement
        1 free
          1 szone_size
            1 szone_size
      10 0x6
        6 DumpJSValue
          6 DumpJSValue
        3 NS_DebugBreak_P
          3 NS_DebugBreak_P
        1 mozilla::scache::NS_NewBufferFromStorageStream(nsIStorageStream*, char**, unsigned int*)
          1 mozilla::scache::NS_NewBufferFromStorageStream(nsIStorageStream*, char**, unsigned int*)
      8 DumpJSEval
        8 DumpJSEval
      8 JSObject::getCompartment(JSContext*)
        8 JSObject::getCompartment(JSContext*)
      7 catch_exception_raise
        7 catch_exception_raise
      7 js_Enumerate(JSContext*, JSObject*, JSIterateOp, js::Value*, int*)
        7 js_Enumerate(JSContext*, JSObject*, JSIterateOp, js::Value*, int*)
      6 js_fgets(char*, int, __sFILE*)
        4 js_fgets(char*, int, __sFILE*)
        2 malloc
          2 malloc_zone_malloc
            2 szone_malloc
              1 szone_malloc
              1 tiny_malloc_from_free_list
                1 tiny_malloc_from_free_list
      5 0x1c
        3 DumpJSValue
          3 DumpJSValue
        2 NS_StringSetDataRange_P
          1 NS_StringSetDataRange_P
          1 nsPrintSession::Release()
            1 nsPrintSession::Release()
      5 PR_Now
        4 PR_Now
        1 __commpage_gettimeofday
          1 __commpage_gettimeofday
      4 JS_GetFrameFunctionObject
        4 JS_GetFrameFunctionObject
      4 NS_Alloc_P
        2 dyld_stub_malloc
          2 dyld_stub_malloc
        2 malloc
          1 malloc
          1 malloc_zone_malloc
            1 malloc_zone_malloc
      3 JS_ObjectIsFunction
        3 JS_ObjectIsFunction
      3 js_GetScriptLineExtent(JSScript*)
        3 js_GetScriptLineExtent(JSScript*)
      2 0x1
        2 DumpJSValue
          2 DumpJSValue
      2 DumpJSObject
        2 DumpJSObject
      2 JS_IsExceptionPending
        2 JS_IsExceptionPending
      2 NS_StringSetDataRange_P
        2 NS_StringSetDataRange_P
      2 js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
        2 js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
      2 js_GetterOnlyPropertyStub(JSContext*, JSObject*, int, unsigned long long*)
        2 js_GetterOnlyPropertyStub(JSContext*, JSObject*, int, unsigned long long*)
      2 memset
        2 memset
      2 moz_xmalloc
        2 malloc
          2 malloc_zone_malloc
            1 __spin_lock
              1 __spin_lock
            1 szone_malloc
              1 small_malloc_from_free_list
                1 small_malloc_from_free_list
      1 0x248767d0
        1 nsPrintSession::Release()
          1 nsPrintSession::Release()
      1 0x5
        1 DumpJSValue
          1 DumpJSValue
      1 0x73636968
        1 0x15
          1 catch_exception_raise
            1 PR_StringToNetAddr
              1 PR_SetError
                1 PR_SetError
      1 JS_BeginRequest
        1 JS_BeginRequest
      1 JS_CallFunctionValue
        1 JS_CallFunctionValue
      1 JS_DHashTableOperate
        1 JS_DHashTableOperate
      1 JS_DefinePropertyById
        1 js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
          1 js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
      1 JS_FrameIterator
        1 JS_FrameIterator
      1 JS_GetFunctionScript
        1 JS_GetFunctionScript
      1 JS_GetGlobalForObject
        1 JS_GetGlobalForObject
      1 JS_GetScriptFilenameFlags
        1 JS_GetScriptFilenameFlags
      1 JS_IsRunning
        1 JS_IsRunning
      1 JS_SetReservedSlot
        1 JS_SetReservedSlot
      1 NS_CycleCollectorForget2_P
        1 NS_CycleCollectorForget2_P
      1 NS_CycleCollectorSuspect2_P
        1 NS_CycleCollectorSuspect2_P
      1 NS_Realloc_P
        1 realloc
          1 malloc_zone_realloc
            1 __spin_lock
              1 __spin_lock
      1 PR_Lock
        1 PR_Lock
      1 XRE_AddManifestLocation
        1 XRE_AddManifestLocation
      1 bcmp
        1 bcmp
      1 free
        1 szone_free
          1 szone_free
      1 js_IsDensePrimitiveArray(JSObject*)
        1 js_IsDensePrimitiveArray(JSObject*)
      1 js_ObjectToOuterObject
        1 js_ObjectToOuterObject
      1 js_TraceContext(JSTracer*, JSContext*)
        1 js_TraceContext(JSTracer*, JSContext*)
      1 js_ValueToIterator(JSContext*, unsigned int, js::Value*)
        1 js_ValueToIterator(JSContext*, unsigned int, js::Value*)
      1 memcpy
        1 memcpy
    755 Thread_2603
      755 thread_start
        755 catch_exception_raise
          755 mach_msg
            755 mach_msg_trap
              755 mach_msg_trap
    755 Thread_2703
      755 kevent
        755 kevent
    755 Thread_2803
      755 XRE_AddStaticComponent
        755 PR_WaitCondVar
          755 PRP_NakedNotify
            755 pthread_cond_timedwait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_2903
      755 thread_start
        755 _pthread_start
          755 js_ValueToSource(JSContext*, js::Value const&)
            755 PR_WaitCondVar
              755 pthread_cond_wait$UNIX2003
                755 __semwait_signal
                  755 __semwait_signal
    755 Thread_2a03
      755 DumpJSValue
        755 PR_WaitCondVar
          755 PRP_NakedNotify
            755 pthread_cond_timedwait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_2b03
      755 XRE_AddStaticComponent
        755 PR_Wait
          755 PR_WaitCondVar
            755 pthread_cond_wait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_2c03
      755 XRE_AddStaticComponent
        755 PR_Wait
          755 PR_WaitCondVar
            755 pthread_cond_wait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_2d03
      755 PR_WaitCondVar
        755 pthread_cond_wait$UNIX2003
          755 __semwait_signal
            755 __semwait_signal
    755 Thread_2e03
      755 DumpJSValue
        755 PR_WaitCondVar
          755 pthread_cond_wait$UNIX2003
            755 __semwait_signal
              755 __semwait_signal
    755 Thread_2f03
      755 XRE_AddStaticComponent
        755 PR_Wait
          755 PR_WaitCondVar
            755 pthread_cond_wait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_3003
      755 XRE_AddStaticComponent
        755 PR_Wait
          755 PR_WaitCondVar
            755 pthread_cond_wait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_3103
      755 XRE_AddStaticComponent
        755 PR_Wait
          755 PR_WaitCondVar
            755 pthread_cond_wait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_3203
      755 XRE_AddStaticComponent
        755 PR_Wait
          755 PR_WaitCondVar
            755 pthread_cond_wait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_3303
      755 XRE_AddStaticComponent
        755 PR_Wait
          755 PR_WaitCondVar
            755 pthread_cond_wait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_3403
      755 XRE_AddStaticComponent
        755 PR_Wait
          755 PR_WaitCondVar
            755 pthread_cond_wait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_3503
      755 XRE_AddStaticComponent
        755 PR_Wait
          755 PR_WaitCondVar
            755 pthread_cond_wait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_3603
      755 catch_exception_raise
        755 PR_Poll
          755 select$DARWIN_EXTSN
            755 select$DARWIN_EXTSN
    755 Thread_3703
      755 catch_exception_raise
        755 PR_WaitCondVar
          755 PRP_NakedNotify
            755 pthread_cond_timedwait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_3803
      755 catch_exception_raise
        755 PR_WaitCondVar
          755 PRP_NakedNotify
            755 pthread_cond_timedwait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal
    755 Thread_3903
      755 catch_exception_raise
        755 PR_WaitCondVar
          755 PRP_NakedNotify
            755 pthread_cond_timedwait$UNIX2003
              755 __semwait_signal
                755 __semwait_signal

Total number in stack (recursive counted multiple, when >=5):
        17       PR_WaitCondVar
        17       __semwait_signal
        12       pthread_cond_wait$UNIX2003
        11       XRE_AddStaticComponent
        9       DumpJSValue
        9       PR_Wait
        7       catch_exception_raise
        5       PRP_NakedNotify
        5       js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)
        5       pthread_cond_timedwait$UNIX2003

Sort by top of stack, same collapsed (when >= 5):
        __semwait_signal        12835
        kevent        755
        mach_msg_trap        755
        select$DARWIN_EXTSN        755
        XRE_AddStaticComponent        227
        DumpJSValue        130
        mozilla::scache::NS_NewBufferFromStorageStream(nsIStorageStream*, char**, unsigned int*)        127
        JS_HashTableRemove        74
        JS_sprintf_append        20
        NS_InvokeByIndex_P        16
        nsPrintSession::Release()        15
        DumpJSEval        8
        JSObject::getCompartment(JSContext*)        8
        js_GetClassPrototype(JSContext*, JSObject*, JSProtoKey, JSObject**, js::Class*)        8
        catch_exception_raise        7
        js_Enumerate(JSContext*, JSObject*, JSIterateOp, js::Value*, int*)        7
        NS_StringSetDataRange_P        5
        PR_Now        5
        __memcpy        5
        js_fgets(char*, int, __sFILE*)        5
Sample analysis of process 1392 written to file /dev/stdout

Comment 1

[Liz Compton [:liz]]

I forgot to copy the user agent string, but I was using Firefox 4 beta 6 on a Windows 7 machine.

I don't know whether it's the same problem, but every time I try to use beta 6 it hangs forever and I have to close it. Here's the error message:

Description:
  A problem caused this program to stop interacting with Windows.

Problem signature:
  Problem Event Name:	AppHangB1
  Application Name:	firefox.exe
  Application Version:	2.0.0.3909
  Application Timestamp:	4c8fa718
  Hang Signature:	c2e9
  Hang Type:	0
  OS Version:	6.1.7600.2.0.0.256.48
  Locale ID:	1033
  Additional Hang Signature 1:	c2e9a177902c925ae53f0a3a6839c2fa
  Additional Hang Signature 2:	30df
  Additional Hang Signature 3:	30df86a52a985ac920069a88de39d725
  Additional Hang Signature 4:	c2e9
  Additional Hang Signature 5:	c2e9a177902c925ae53f0a3a6839c2fa
  Additional Hang Signature 6:	30df
  Additional Hang Signature 7:	30df86a52a985ac920069a88de39d725

Read our privacy statement online:
  http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409

If the online privacy statement is not available, please read our privacy statement offline:
  C:\Windows\system32\en-US\erofflps.txt

Comment 2

[Alexey]

Do you have a Roboform plugin >= v.6.9.96???
I know bug of Roboform when Firefox 3.*.* hangs up (cpu 100%) because Roboform installed. Tested more more times and same results -> bug in Roboform plugin

Comment 3

[Liz Compton [:liz]]

I'm not sure which of us you're asking, but I don't.

Comment 4

[Tyler Downer [He/Him]]

This bug was reported using a pre-release version of Firefox 4. Now that Firefox 4.0.1 final has been released, can you please update and retest your bug? A fresh profile would be a good starting place to test, 
http://support.mozilla.com/kb/Managing+profiles. If you continue to see the issue, can you please update this bug with your results?

Filter: firefox4prebugsunco

Comment 5

[Liz Compton [:liz]]

I don't have the problem anymore.

Comment 6

[Swarnava Sengupta (:Swarnava)]

cant reproduce on Firefox 11, 12b4,13 and 14

for support please ask question in https://support.mozilla.org/questions/new

Comment 7

[Hermann Schaefer]

I have simular problems. The longer Firefox (no matter what versions, but it got worse!) runs, the more it stalls completely. Other processes continue to work without a problem, but Firefox can stall for more than a minute. Switching between windows, tabs, reloading pages, scrolling in pages - the longer Firefox runs (for several hours to days with quite some windows and tabs open) the more often it takes its time..
Restarting Firefox "cures" the problem every time.