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Debug shared object on remote device with QtCreator?

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  • jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #2

    Does the library contain debug symbols?
    You need a debug build of that library.

    https://forum.qt.io/topic/113070/qt-code-of-conduct

    fl0mllF 1 Reply Last reply
    0
    • jsulmJ jsulm

      Does the library contain debug symbols?
      You need a debug build of that library.

      fl0mllF Offline
      fl0mllF Offline
      fl0mll
      wrote on last edited by
      #3

      @jsulm yes both are enabled for debug target.

      fl0mllF 1 Reply Last reply
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      • jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by jsulm
        #4

        What happens if you try to step into the library?
        Do you see assembler code?
        And does your app link against the debug build of that library?

        https://forum.qt.io/topic/113070/qt-code-of-conduct

        fl0mllF 2 Replies Last reply
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        • fl0mllF fl0mll

          @jsulm yes both are enabled for debug target.

          fl0mllF Offline
          fl0mllF Offline
          fl0mll
          wrote on last edited by
          #5

          @fl0mll I tried the same application on desktop build and this works.

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          • jsulmJ jsulm

            What happens if you try to step into the library?
            Do you see assembler code?
            And does your app link against the debug build of that library?

            fl0mllF Offline
            fl0mllF Offline
            fl0mll
            wrote on last edited by
            #6

            @jsulm If I step into the QtCreator wait for some seconds and returns at the next line. If I try the same on Desktop it steps into the library code.

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            • jsulmJ jsulm

              What happens if you try to step into the library?
              Do you see assembler code?
              And does your app link against the debug build of that library?

              fl0mllF Offline
              fl0mllF Offline
              fl0mll
              wrote on last edited by
              #7

              @jsulm

              Do you see assembler code?
              no
              And does your app link against the debug build of that library?
              yes, because the build folder includes name debug.

              I checked the output again and I get some console outputs:

              Could not load shared library symbols for 2 libraries, e.g. /usr/bin/QSettingsDemo.
              Use the "info sharedlibrary" command to see the complete listing.
              Do you need "set solib-search-path" or "set sysroot"?File "/usr/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libstdc++.so.6.0.19-gdb.py" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load".
              
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              • jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on last edited by
                #8

                You should check with ldd whether your app really links against debug build of that library. Being built in the debug directory does not mean it is linked against debug build of a library.

                https://forum.qt.io/topic/113070/qt-code-of-conduct

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                • jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #9

                  "Could not load shared library symbols for 2 libraries, e.g. /usr/bin/QSettingsDemo" - that says that these two libraries do not contain symbols (release build).

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  fl0mllF 1 Reply Last reply
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                  • jsulmJ jsulm

                    "Could not load shared library symbols for 2 libraries, e.g. /usr/bin/QSettingsDemo" - that says that these two libraries do not contain symbols (release build).

                    fl0mllF Offline
                    fl0mllF Offline
                    fl0mll
                    wrote on last edited by
                    #10

                    @jsulm I got this output with ldd

                    ldd /usr/lib/libDemoLibrary.so.1.0.0
                    checking sub-depends for '/usr/lib/libQtNetwork.so.4'
                    checking sub-depends for '/usr/lib/libQtCore.so.4'
                    checking sub-depends for '/lib/libpthread.so.0'
                    	ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0xb6f02000)
                    	libdl.so.0 => /lib/libdl.so.0 (0xb6ef6000)
                    	libc.so.0 => /lib/libc.so.0 (0xb6ea8000)
                    checking sub-depends for '/usr/lib/libstdc++.so.6'
                    checking sub-depends for '/lib/libm.so.0'
                    	libc.so.0 => /lib/libc.so.0 (0xb6f54000)
                    	ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0xb6fa2000)
                    checking sub-depends for '/lib/libgcc_s.so.1'
                    checking sub-depends for '/lib/libc.so.0'
                    	ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0xb6f52000)
                    checking sub-depends for '/lib/libdl.so.0'
                    	libc.so.0 => /lib/libc.so.0 (0xb6f77000)
                    	ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0xb6fc5000)
                    checking sub-depends for '/lib/librt.so.0'
                    	libc.so.0 => /lib/libc.so.0 (0xb6f3e000)
                    	libdl.so.0 => /lib/libdl.so.0 (0xb6f32000)
                    	libpthread.so.0 => /lib/libpthread.so.0 (0xb6f17000)
                    	ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0xb6f8c000)
                    	libQtNetwork.so.4 => /usr/lib/libQtNetwork.so.4 (0x00000000)
                    	libQtCore.so.4 => /usr/lib/libQtCore.so.4 (0x00000000)
                    	libpthread.so.0 => /lib/libpthread.so.0 (0x00000000)
                    	libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00000000)
                    	libm.so.0 => /lib/libm.so.0 (0x00000000)
                    	libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00000000)
                    	libc.so.0 => /lib/libc.so.0 (0x00000000)
                    	libdl.so.0 => /lib/libdl.so.0 (0x00000000)
                    	librt.so.0 => /lib/librt.so.0 (0x00000000)
                    	/lib/ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0x00000000)
                    	/lib/ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0x00000000)
                    
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                    • jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by
                      #11

                      I actually meant to use ldd with the executable.
                      Is /usr/lib/libDemoLibrary.so.1.0.0 the library you want to debug?
                      Is it built in debug or release mode?
                      What does "nm /usr/lib/libDemoLibrary.so.1.0.0" say?

                      https://forum.qt.io/topic/113070/qt-code-of-conduct

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                      • fl0mllF Offline
                        fl0mllF Offline
                        fl0mll
                        wrote on last edited by fl0mll
                        #12

                        @jsulm I found a nice information http://visualgdb.com/gdbreference/commands/set_solib-search-path

                        Now I set the solib-search-path on the gdb Additional Startup Commands and it works. It takes some seconds before it could step into but it works.

                        This way is not comfortable so is there a way to add this to the .pro file?

                        1 Reply Last reply
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