[Interest] QtBluetoothSocket write() crashes on Android after sending a few messages
Krzysztof Lesiak
wave.dev at hotmail.com
Tue Apr 18 18:33:22 CEST 2017
Alright, since my responses didn't go to the mailing list but to Thiago directly, I'm posting them here once again.
Here's the crash log from logcat:
04-03 11:03:29.598 31623 31643 F libc : Fatal signal 7 (SIGBUS), code 2, fault addr 0x9ef84000 in tid 31643 (QtThread)
04-03 11:03:29.703 468 468 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
04-03 11:03:29.703 468 468 F DEBUG : CM Version: '13.1.4-ZNH2KAS5FE-paella'
04-03 11:03:29.703 468 468 F DEBUG : Build fingerprint: 'bq/Aquaris_X5/Aquaris_X5:6.0.1/MHC19Q/ZNH2KAS5FE:user/release-keys'
04-03 11:03:29.703 468 468 F DEBUG : Revision: '0'
04-03 11:03:29.703 468 468 F DEBUG : ABI: 'arm'
04-03 11:03:29.703 468 468 F DEBUG : pid: 31623, tid: 31643, name: QtThread >>> net.armsofsorrow.expressionist <<<
04-03 11:03:29.703 468 468 F DEBUG : signal 7 (SIGBUS), code 2 (BUS_ADRERR), fault addr 0x9ef84000
04-03 11:03:29.726 468 468 F DEBUG : r0 9ef6776c r1 00000000 r2 00004b44 r3 9ef83ff0
04-03 11:03:29.727 468 468 F DEBUG : r4 9ef6776c r5 9ef676f0 r6 b3f96309 r7 9ef677d0
04-03 11:03:29.727 468 468 F DEBUG : r8 00000000 r9 9ef67700 sl b8c72298 fp 9ef6776c
04-03 11:03:29.727 468 468 F DEBUG : ip 00000000 sp 9ef67688 lr b5bfbc9d pc b6ceadec cpsr 28070010
04-03 11:03:29.747 468 468 F DEBUG :
04-03 11:03:29.747 468 468 F DEBUG : backtrace:
04-03 11:03:29.748 468 468 F DEBUG : #00 pc 00016dec /system/lib/libc.so (memset+48)
04-03 11:03:29.748 468 468 F DEBUG : #01 pc 00009c99 /system/lib/libunwind.so (_Uarm_local_access_addr_space_init+8)
04-03 11:03:29.748 468 468 F DEBUG : #02 pc 000091b7 /system/lib/libunwind.so
04-03 11:03:29.748 468 468 F DEBUG : #03 pc 00002b5f /system/lib/libunwind.so (unw_map_local_create+30)
04-03 11:03:29.748 468 468 F DEBUG : #04 pc 0000501f /system/lib/libbacktrace.so (_ZN14UnwindMapLocal5BuildEv+4)
04-03 11:03:29.748 468 468 F DEBUG : #05 pc 000050c1 /system/lib/libbacktrace.so (_ZN12BacktraceMap6CreateEib+64)
04-03 11:03:29.748 468 468 F DEBUG : #06 pc 00003311 /system/lib/libbacktrace.so (_ZN9BacktraceC1EiiP12BacktraceMap+40)
04-03 11:03:29.748 468 468 F DEBUG : #07 pc 0000335d /system/lib/libbacktrace.so (_ZN9Backtrace6CreateEiiP12BacktraceMap+60)
04-03 11:03:29.748 468 468 F DEBUG : #08 pc 0035a3f1 /system/lib/libart.so (_ZN3art15DumpNativeStackERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEEiPKcPNS_9ArtMethodEPv+112)
04-03 11:03:29.748 468 468 F DEBUG : #09 pc 0033af87 /system/lib/libart.so (_ZNK3art6Thread4DumpERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEE+138)
04-03 11:03:29.748 468 468 F DEBUG : #10 pc 0024de23 /system/lib/libart.so (_ZN3art9JavaVMExt8JniAbortEPKcS2_+750)
04-03 11:03:29.748 468 468 F DEBUG : #11 pc 0024e4c7 /system/lib/libart.so (_ZN3art9JavaVMExt9JniAbortVEPKcS2_St9__va_list+54)
04-03 11:03:29.748 468 468 F DEBUG : #12 pc 000fbc9d /system/lib/libart.so (_ZN3art11ScopedCheck6AbortFEPKcz+28)
04-03 11:03:29.748 468 468 F DEBUG : #13 pc 00100aa3 /system/lib/libart.so (_ZN3art11ScopedCheck5CheckERNS_18ScopedObjectAccessEbPKcPNS_12JniValueTypeE.constprop.95+4894)
04-03 11:03:29.749 468 468 F DEBUG : #14 pc 0010a6d5 /system/lib/libart.so (_ZN3art8CheckJNI17NewPrimitiveArrayEPKcP7_JNIEnviNS_9Primitive4TypeE+364)
04-03 11:03:29.749 468 468 F DEBUG : #15 pc 00067400 /data/app/net.armsofsorrow.expressionist-1/lib/arm/libQt5Bluetooth.so
04-03 11:03:30.203 468 468 F DEBUG :
04-03 11:03:30.203 468 468 F DEBUG : Tombstone written to: /data/tombstones/tombstone_00
I didn't manage to get any meaningful stack trace when debugging with QtCreator; it reports a SIGSEGV and drops down to disassembly without a trace.
________________________________
From: Krzysztof Lesiak <wave.dev at hotmail.com>
Sent: Monday, April 17, 2017 11:17 PM
To: Thiago Macieira
Subject: Re: [Interest] QtBluetoothSocket write() crashes on Android after sending a few messages
I remember having the same problem with an older device with the app running on dalvik. However, I don't have it anymore and thus, can't get any meaningful output.
Is there something I can do to get a more precise trace to find out where that abort is coming from (or whatever else that could help in this case)?
On Apr 18, 2017 1:07 AM, Thiago Macieira <thiago.macieira at intel.com> wrote:
Java does, but this isn't Java. This is a C++ library, whose purpose happens
to be to run a Java VM.
It looks like the Qt code caused an abort (frame #12 is
art::ScopedCheck::AbortF), and when trying to do a stack dump, ART crashed.
It's a double fault.
On segunda-feira, 17 de abril de 2017 16:04:09 PDT Krzysztof Lesiak wrote:
> Doesn't java usually throw exceptions, though, instead of segfaulting? Could
> it be some error inside the JNI wrapper code?
> Also, I've noticed that the crash always happens after the same number of
> iterations (I think it was 1620), which is particularly weird, but that
> actually allowed me to reliably step into the sources.
> On Apr 18, 2017
> 12:53 AM, Thiago Macieira <thiago.macieira at intel.com> wrote:
> On segunda-feira, 17 de abril de 2017 15:49:22 PDT Krzysztof Lesiak wrote:
>
> > It's never reported, neither in logcat, nor in the debugger. When I step
> > through the sources, the crashing line is in
> > QBluetoothSocketPrivate::writeData (qbluetoothsocket_android.cpp, line
> > 628)
>
> >
> >
> > "outputStream.callMethod<void>("write", "([BII)V", nativeData, 0,
> > (qint32)maxSize);"
> >
> >
> >
> >
> > This goes down into QAndroidJniObject template instances and crashes
> > somewhere inside there, which goes beyond my current understanding.
>
>
> Mine too. I haven't done Java since the mid-1990s.
> --
> Thiago Macieira - thiago.macieira (AT) intel.com
> Software Architect - Intel Open Source Technology Center
>
--
Thiago Macieira - thiago.macieira (AT) intel.com
Software Architect - Intel Open Source Technology Center
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20170418/c1d93a6d/attachment.html>
More information about the Interest
mailing list