How debugger with Qt on target from host?



  • Hi,
    I am using the debugger on Remote (board Freescale iMX53 with ARM cpu) with QT.

    Debugging a Qt_PlainC (simple program with printf (“hello world”)) program with Qt Creator 2.4.1 (based on Qt 4.7.4-32 bit) on a remote arm target (imx53 Quick start board) shows the following errors:
    1)The execution it is not stopped automatically at the program 1° execution line (like Eclipse)
    2)If a BreakPoint is inserted, the program is stopped correctly at the breakpoint (and the values of variables are correct) but the program cannot resume ed the error : "Cannot continue degugged process:unknown error" appears.

    The shared libraries on the arm target have been generated with an updated LTIB from Freescale and are correct because the same "Hello word" program debugged with Eclipse work perfectly

    Below the Application Output

    Remote process started.
    Process /opt/Qt_PlainC/bin/Qt_PlainC created; pid = 3150
    Listening on port 10000
    Remote debugging from host 192.168.123.1
    Unable to find dynamic linker breakpoint function.
    GDB will be unable to debug shared library initializers
    and track explicitly loaded dynamic code./lib/libm.so.6': Shared library architecture unknown is not compatible with target architecture arm. .dynamic section for "/lib/libm.so.6" is not at the expected address (wrong library or version mismatch?)/lib/libgcc_s.so.1': Shared library architecture unknown is not compatible with target architecture arm.
    .dynamic section for "/lib/libgcc_s.so.1" is not at the expected address (wrong library or version mismatch?)
    `/lib/libc.so.6': Shared library architecture unknown is not compatible with target architecture arm.
    .dynamic section for "/lib/libc.so.6" is not at the expected address (wrong library or version mismatch?)
    Could not load shared library symbols for 2 libraries, e.g. /lib/libstdc++.so.6.
    Use the "info sharedlibrary" command to see the complete listing.
    Do you need "set solib-search-path" or "set sysroot"?Detaching from inferior
    Hello World!
    Debuggin



  • The error in case 1) might be that you did not hit the <F10> key to start debugging-with-stop-at-main, but something else.

    The error in case 2) might be that you did not specify the sysroot properly. It pretty much looks like you did not set any at all, so gdb found a file /lib/libc.so.6, but that's the one from your host system, not a copy of one from your target system.

    Check your tool chain settings in Qt Creator, and if that does not help, post a full debugger log (contents of the right pane of Windows->Views->Debugger Log).



  • how do you connect the host to the device from QtCreator?
    when I try to define the the linux device in qtcreator > Tools > Options > Linux Devices, i get this message:
    "Connecting to host...
    SSH connection failure: Timeout waiting for reply from server.
    Device test failed."
    I need to debug on ARM32 system...



  • Can you connect to the device using ssh, from a normal shell, without entering a password (i.e. using authorized_keys)?



  • yes, i use the command: ssh -o ‘StrictHostKeyChecking no’ root@1.0.0.1

    when i go to Debug > Start Debugging > Attach to Remote Debug Server, and init the host and port, and all other attributes, I insert into debug mode, but the program does not stop in the breakpoints i put in the files on host. when i pause the debug it stop in assembler code.

    The output i get for the debug is:
    Could not load shared library symbols for 48 libraries, e.g. /usr/lib/libglib-2.0.so.0.
    Use the “info sharedlibrary” command to see the complete listing.
    Do you need “set solib-search-path” or “set sysroot”?Unable to find dynamic linker breakpoint function.
    GDB will be unable to debug shared library initializers
    and track explicitly loaded dynamic code.
    .



    1. Try change your setup in a way that allows ssh connection without any extra options.

    2. This looks like you either did not specify the sysroot correctly, or the sysroot misses some libraries. At the very least, copy the contents of /lib/* from the target to $sysroot/lib/* on the host.



    1. what do you mean "ssh connection without any extra options"?

    2. I init the sysyroot to be the directory to the copy of the target root on the host, and I get this error:
      "Unable to find dynamic linker breakpoint function.
      GDB will be unable to debug shared library initializers
      and track explicitly loaded dynamic code."

    I can't find any information about the right arguments for the debbuger...



    1. Just ssh root@1.0.0.1, no -o ‘StrictHostKeyChecking no’

    2. Pastebin the debugger log and put a link here (contents of the right pane of Windows->Views->Debugger Log)



    1. when I try only ssh root@1.0.0.1 , I get this message:
      "RSA host key for 1.0.0.1 has changed and you have requested strict checking.
      Host key verification failed."

    2. The copy of the board root is /ROOT
      The executable and the file for debug are in /DEBUG-ROOT/MyProject
      the debug output :
      dQUIT DEBUGGER REQUESTED IN STATE 11
      dState changed from InferiorRunOk(11) to InferiorStopRequested(13).
      dCALL: INTERRUPT INFERIOR
      sStop requested...
      dTRYING TO INTERRUPT INFERIOR
      <83-exec-interrupt

    83^done
    *stopped,reason="signal-received",signal-name="SIGINT",signal-meaning="Interrupt",frame={addr="0x2c80e550",func="??",args=[]},thread-id="1",stopped-threads="all"
    dNOTE: INFERIOR STOP OK
    dNOTE: ... WHILE DYING.
    dNOTE: ... FORWARDING TO 'STOP OK'.
    dState changed from InferiorStopRequested(13) to InferiorStopOk(14).
    dState changed from InferiorStopOk(14) to InferiorShutdownRequested(17).
    dQUEUE: SHUTDOWN INFERIOR
    dNOTE: ... IGNORING STOP MESSAGE
    dCALL: SHUTDOWN INFERIOR
    <84detach
    &"detach\n"
    ~"Ending remote debugging.\n"
    =thread-group-exited,id="i1"
    sThread group i1 exited
    =library-unloaded,id="/lib/ld-linux.so.3",target-name="/lib/ld-linux.so.3",host-name="/home/eyal/Desktop/ROOT/lib/ld-linux.so.3",thread-group="i1"
    sLibrary /lib/ld-linux.so.3 unloaded
    84^done
    dINFERIOR SUCCESSFULLY SHUT DOWN
    dState changed from InferiorShutdownRequested(17) to InferiorShutdownOk(19).
    dState changed from InferiorShutdownOk(19) to EngineShutdownRequested(20).
    dQUEUE: SHUTDOWN ENGINE
    dCALL: SHUTDOWN ENGINE
    dINITIATE GDBENGINE SHUTDOWN IN STATE 0, PROC: 2
    <85-gdb-exit
    85^exit
    dGDB CLAIMS EXIT; WAITING
    dGDB PROCESS FINISHED, status 0, code 0
    dNOTE: ENGINE SHUTDOWN OK
    dState changed from EngineShutdownRequested(20) to EngineShutdownOk(22).
    dState changed from EngineShutdownOk(22) to DebuggerFinished(23).
    dQUEUE: FINISH DEBUGGER
    dNOTE: FINISH DEBUGGER
    dHANDLE RUNCONTROL FINISHED
    sDebugger finished.
    dATTEMPT SYNC
    sStarting debugger 'GdbEngine' for ABI 'unknown-unknown-unknown-unknown-unknown'...
    dStart parameters: 'Remote: "1.0.0.1:1234"' mode: 6
    dABI: unknown-unknown-unknown-unknown-unknown
    dExecutable: /DEBUG-ROOT/MyProject
    dDebugger: /home/eyal/QtSDK/pythongdb/gdb
    dQML server: 127.0.0.1:3768
    dRemote: 1.0.0.1:1234, arm
    dGnu target: arm-none-linux-gnueabi
    dSysroot: /home/eyal/Desktop/ROOT
    dDebug Source Loaction: /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/corelib:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/gui:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/network:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/v8:/home/eyal/Desktop/ROOT/usr/src/debug/qtdeclarative/src/declarative/qml
    dSymbol file:
    dDumper libraries:
    d



  • dDebugger settings:
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    dUseMessageBoxForSignals: true (default: true)
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    dShowThreadNames: true (default: false) ***
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    dAlwaysAdjustModulesColumnWidths: false (default: false)
    dState changed from DebuggerNotReady(0) to EngineSetupRequested(1).
    dQUEUE: SETUP ENGINE
    dCALL: SETUP ENGINE
    dTRYING TO START ADAPTER
    dENABLING TEST CASE: 0
    dSTARTING /home/eyal/QtSDK/pythongdb/gdb -i mi
    dGDB STARTED, INITIALIZING IT
    <86show version
    <87-list-features
    <88set print object on
    <89set breakpoint pending on
    <90set print elements 10000
    <91set overload-resolution off
    <92handle SIGSEGV nopass stop print
    <93set unwindonsignal on
    <94pwd
    <95set width 0
    <96set height 0
    <97set auto-solib-add on
    <98-interpreter-exec console "maintenance set internal-warning quit no"
    <99-interpreter-exec console "maintenance set internal-error quit no"
    <100-interpreter-exec console "disassemble 0 0"
    <101-interpreter-exec console "python execfile('/home/eyal/QtSDK/QtCreator/share/qtcreator/dumper/bridge.py')"
    <102-interpreter-exec console "python execfile('/home/eyal/QtSDK/QtCreator/share/qtcreator/dumper/dumper.py')"
    <103-interpreter-exec console "python execfile('/home/eyal/QtSDK/QtCreator/share/qtcreator/dumper/qttypes.py')"
    <104-interpreter-exec console "bbsetup"
    dADAPTER SUCCESSFULLY STARTED
    dNOTE: ENGINE SETUP OK
    dState changed from EngineSetupRequested(1) to EngineSetupOk(3).
    dQUEUE: SETUP INFERIOR
    dState changed from EngineSetupOk(3) to InferiorSetupRequested(4).
    dQUEUE: SETUP INFERIOR
    dCALL: SETUP INFERIOR
    sSetting up inferior...
    <105set debug-file-directory /home/eyal/debug.txt
    <106directory /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/corelib
    <107directory /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/gui
    <108directory /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/network
    <109directory /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/v8
    <110directory /home/eyal/Desktop/ROOT/usr/src/debug/qtdeclarative/src/declarative/qml
    <111set architecture arm
    <112set gnutarget arm-none-linux-gnueabi
    <113set sysroot /home/eyal/Desktop/ROOT
    <114set target-async on
    <115-file-exec-and-symbols "/DEBUG-ROOT/MyProject"

    =thread-group-added,id="i1"



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    ~"http://www.gnu.org/software/gdb/bugs/.\n"
    &"/home/eyal/.gdbinit:1: Error in sourced command file:\n"
    &"192.168.23.44:1234: Network is unreachable.\n"
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    86^done
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    dand "show warranty" for details.
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    dFor bug reporting instructions, please see:
    dhttp://www.gnu.org/software/gdb/bugs/.
    dGNU gdb (GDB) 7.2
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    dLicense GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
    dThis is free software: you are free to change and redistribute it.
    dThere is NO WARRANTY, to the extent permitted by law. Type "show copying"
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    dThis GDB was configured as "--host=i686-pc-linux-gnu --target=arm-none-linux-gnueabi".
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    dUSING GDB VERSION: 70200, BUILD: 2010
    87^done,features=["frozen-varobjs","pending-breakpoints","thread-info","python"]
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    99^done
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    101^done
    102^done
    103^done
    ~"dumpers=[{type="QLinkedList",formats=""},{type="QSize",formats=""},{type="QFileInfo",formats=""},{type="QAbstractItemModel",formats=""},{type="std__stack",formats=""},{type="QTextDocument",formats=""},{type="QTJSC__JSValue",formats=""},{type="__gnu_cxx__hash_set",formats=""},{type="QStringList",formats=""},{type="QRegion",formats=""},{type="std__wstring",formats=""},{type="QString",formats="Inline,Separate Window",editable="true"},{type="QTextCodec",formats=""},{type="QBasicAtomicInt",formats=""},{type="QScriptValue",formats=""},{type="QTime",formats=""},{type="QSharedData",formats=""},{type="std__vector",formats="",editable="true"},{type="QRegExp",formats=""},{type="QTextCursor",formats=""},{type="QxXmlAttributes",formats=""},{type="QDateTime",formats=""},{type="QList",formats=""},{type="QStandardItem",formats=""},{type="std__deque",formats=""},{type="QFixed",formats=""},{type="QHash",formats=""},{type="QSharedPointer",formats=""},{type="QUrl",formats=""},{type="std__set",formats=""},{type="std__list",formats=""},{type="std__basic_string",formats=""},{type="QPoint",formats=""},{type="QHostAddress",formats=""},{type="QStack",formats=""},{type="QScopedPointer",formats=""},{type="QRectF",formats=""},{type="QMultiMap",formats=""},{type="QMapNode",formats=""},{type="QModelIndex",formats="Normal,Enhanced"},{type="QLocale",formats=""},{type="QSharedDataPointer",formats=""},{type="QVariant",formats=""},{type="string",formats="",editable="true"},{type="QBasicAtomicPointer",formats=""},{type="QVector",formats="",editable="true"},{type="QDate",formats=""},{type="QFile",formats=""},{type="QAtomicInt",formats=""},{type="TBuf",formats=""},{type="QWeakPointer",formats=""},{type="QSizeF",formats=""},{type="__m128



  • ",formats="As Floats,As Doubles"},{type="boost__optional",formats=""},{type="wstring",formats=""},{type="QPointF",formats=""},{type="TLitC",formats=""},{type="QRect",formats=""},{type="QByteArray",formats=""},{type="QMap",formats=""},{type="boost__shared_ptr",formats=""},{type="QChar",formats=""},{type="QDir",formats=""},{type="QPixmap",formats=""},{type="QFlags",formats=""},{type="std__map",formats=""},{type="QHashNode",formats=""},{type="QTemporaryFile",formats=""},{type="QObject",formats=""},{type="Eigen__Matrix",formats=""},{type="std__string",formats="",editable="true"},{type="QImage",formats="Normal,Displayed"},{type="QSet",formats=""},],hasInferiorThreadList="1"\n"

    104^done
    &"set debug-file-directory /home/eyal/debug.txt\n"
    105^done
    &"directory /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/corelib\n"
    &"Warning: /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/corelib: No such file or directory.\n"
    ~"Source directories searched: /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/corelib:$cdir:$cwd\n"
    106^done
    &"directory /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/gui\n"
    &"Warning: /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/gui: No such file or directory.\n"
    ~"Source directories searched: /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/gui:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/corelib:$cdir:$cwd\n"
    107^done
    &"directory /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/network\n"
    &"Warning: /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/network: No such file or directory.\n"
    ~"Source directories searched: /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/network:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/gui:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/corelib:$cdir:$cwd\n"
    108^done
    &"directory /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/v8\n"
    &"Warning: /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/v8: No such file or directory.\n"
    ~"Source directories searched: /home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/v8:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/network:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/gui:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/corelib:$cdir:$cwd\n"
    109^done
    &"directory /home/eyal/Desktop/ROOT/usr/src/debug/qtdeclarative/src/declarative/qml\n"
    &"Warning: /home/eyal/Desktop/ROOT/usr/src/debug/qtdeclarative/src/declarative/qml: No such file or directory.\n"
    ~"Source directories searched: /home/eyal/Desktop/ROOT/usr/src/debug/qtdeclarative/src/declarative/qml:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/v8:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/network:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/gui:/home/eyal/Desktop/ROOT/usr/src/debug/qt5base/src/corelib:$cdir:$cwd\n"
    110^done
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    111^done
    &"set gnutarget arm-none-linux-gnueabi\n"
    112^done
    &"set sysroot /home/eyal/Desktop/ROOT\n"
    113^done
    &"set target-async on\n"
    114^done
    115^done
    <116target remote 1.0.0.1:1234
    &"target remote 1.0.0.1:1234\n"
    ~"Remote debugging using 1.0.0.1:1234\n"
    =thread-group-started,id="i1",pid="42000"
    sThread group i1 created
    dTaking notice of pid 42000
    =thread-created,id="1",group-id="i1"
    sThread 1 created
    =library-loaded,id="/lib/ld-linux.so.3",target-name="/lib/ld-linux.so.3",host-name="/home/eyal/Desktop/ROOT/lib/ld-linux.so.3",symbols-loaded="0",thread-group="i1"
    sLibrary /lib/ld-linux.so.3 loaded
    ~"Reading symbols from /home/eyal/Desktop/ROOT/lib/ld-linux.so.3..."
    sReading /home/eyal/Desktop/ROOT/lib/ld-linux.so.3......
    ~"(no debugging symbols found)...done.\n"
    ~"Loaded symbols for /home/eyal/Desktop/ROOT/lib/ld-linux.so.3\n"
    ~"0x2c80e550 in ?? ()\n"
    *stopped,frame={addr="0x2c80e550",func="??",args=[]},thread-id="1",stopped-threads="all"
    116^done
    dINFERIOR STARTED
    sAttached to stopped application
    sSetting breakpoints...
    dSetting breakpoints...
    <117-break-insert -f ""operandslistmanageritem.cpp":58"
    <118-break-insert -f ""operandslistmanageritem.cpp":152"
    <119-break-insert -f ""recentlyusedappsupdateritem.cpp":21"
    dATTEMPT SYNC
    &"No symbol table is loaded. Use the "file" command.\n"
    117^done,bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="<PENDING>",pending="\\"operandslistmanageritem.cpp":58",times="0",original-location="\\"operandslistmanageritem.cpp":58"}
    &"No symbol table is loaded. Use the "file" command.\n"
    118^done,bkpt={number="2",type="breakpoint",disp="keep",enabled="y",addr="<PENDING>",pending="\\"operandslistmanageritem.cpp":152",times="0",original-location="\\"operandslistmanageritem.cpp":152"}
    &"No symbol table is loaded. Use the "file" command.\n"
    119^done,bkpt={number="3",type="breakpoint",disp="keep",enabled="y",addr="<PENDING>",pending="\\"recentlyusedappsupdateritem.cpp":21",times="0",original-location="\\"recentlyusedappsupdateritem.cpp":21"}
    dALL COMMANDS DONE; INVOKING CALLBACK



  • <120maint print msymbols /tmp/gdb_ns_.Ny2370

    &"maint print msymbols /tmp/gdb_ns_.Ny2370\n"
    120^done
    dFOUND NON-NAMESPACED QT
    <121-break-insert -f 'qWarning'
    <122-break-insert -f 'qFatal'
    &"Function "qWarning" not defined.\n"
    121^done,bkpt={number="4",type="breakpoint",disp="keep",enabled="y",addr="<PENDING>",pending="'qWarning'",times="0",original-location="'qWarning'"}
    &"Function "qFatal" not defined.\n"
    122^done,bkpt={number="5",type="breakpoint",disp="keep",enabled="y",addr="<PENDING>",pending="'qFatal'",times="0",original-location="'qFatal'"}
    <123-break-commands 5 return
    dNOTE: INFERIOR SETUP OK
    dState changed from InferiorSetupRequested(4) to InferiorSetupOk(6).
    dState changed from InferiorSetupOk(6) to EngineRunRequested(7).
    dQUEUE: RUN ENGINE
    dCALL: RUN ENGINE
    dNOTE: ENGINE RUN AND INFERIOR STOP OK
    dState changed from EngineRunRequested(7) to InferiorStopOk(14).
    dNOTE: INFERIOR RUN REQUESTED
    dState changed from InferiorStopOk(14) to InferiorRunRequested(10).
    sRunning requested...
    <124-exec-continue
    123^done
    124^running
    dNOTE: INFERIOR RUN OK
    dState changed from InferiorRunRequested(10) to InferiorRunOk(11).
    *running,thread-id="all"



  • Hi everyone,

    I'm currently having the same issues as you with settings sysroot path since I'm using QtCreator 2.5.1 (before I used 2.2.1 and no problem at all with remote debugging).

    Have you successully find out this issue? I'm curious about the solution!

    Thanks



  • Hi Noth35 ,

    Sorry but i didn't figure out how to fix this and make it work....
    however, I understand that we need to config this property to be the directory of the copy of the device filesystem on the computer(the root of filesystem).
    when I config this i get into debug mode, but the debbuger can't stop on breakpoints...

    I will be happy to know if you will find solution for this isue.



  • Hi goli,

    Thanks for your reply. I did really hope you had the solution.
    I'll continue to look for a way to set it, I will reply if I'll find something...

    So you debug with printf/qdebug ;)?


  • Moderators

    In Qt Creator 2.5 the sysroot is part of the Qt version. Since that is not an ideal place in 2.6 we have moved it again;-)

    Sorry for the inconvenience. I think the 2.6 version will fix quite a few issues wrt. remote devices and hope we can keep things in this area a bit more stable going forward.



  • Thanks for your reply.

    Is that also true for version 2.4? Seems to have same issue with it...
    I'll keep using previous version of QtCreator, awaiting 2.6.


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