V2 Add DWARF support to the rtemstoolkit and put it to use.

[Chris Johns]

On 10/5/18 8:47 am, Cillian O'Donnell wrote:
> Just running covoar there, we seem to be running into some problems at the
> source line lookup stage

Thank you for testing this. I assume it builds OK and we can run it?

> cpod at cpod ~/development/rtems/leon3 $ covoar -S
> /home/cpod/development/rtems/test/rtems-tools/tester/rtems/testing/coverage/score-symbols.ini
> -O /home/cpod/coverage_test/test/score
> -E/home/cpod/development/rtems/test/rtems-tools/tester/rtems/testing/coverage/Explanations.txt
> -p RTEMS-5 -v sparc-rtems5/c/leon3/testsuites/samples/hello/hello.exe
> Processing multiple executable/coverage file pairs
> Coverage Format : html
> Target          : sparc-rtems5
> 
> Coverage file sparc-rtems5/c/leon3/testsuites/samples/hello/hello.cov for
> executable: sparc-rtems5/c/leon3/testsuites/samples/hello/hello.exe
> Loading symbol sets:
> /home/cpod/development/rtems/test/rtems-tools/tester/rtems/testing/coverage/score-symbols.ini
>  Symbol set: score
>  Loading library: sparc-rtems5/c/leon3/cpukit/score/libscore.a
> cache:load-sym: object files: 192
> cache:load-sym: symbols: 382
> Analyzing 382 symbols
> Extracting information from: sparc-rtems5/c/leon3/testsuites/samples/hello/hello.exe
> Created unified coverage map for _RTEMS_Lock_allocator (0x0 - 0x13)
> Created unified coverage map for _RTEMS_Unlock_allocator (0x0 - 0x13)
> Created unified coverage map for _API_Mutex_Lock (0x0 - 0x2f)
> Created unified coverage map for _API_Mutex_Unlock (0x0 - 0x2f)
> Created unified coverage map for _Chain_Initialize (0x0 - 0x4f)
> Created unified coverage map for _Freechain_Initialize (0x0 - 0x33)
> Created unified coverage map for _Freechain_Get (0x0 - 0x77)
> Created unified coverage map for _Freechain_Put (0x0 - 0x27)
> Created unified coverage map for _Heap_Allocate_aligned_with_boundary (0x0 - 0x23f)
> ................
> ...............
> ...............
> Branch always taken found in_Workspace_Handler_initialization (0x4000ab8c -
> 0x4000ab8f)
> Branch never taken found in _Workspace_Handler_initialization (0x1073785764 -
> 0x1073785767)
> Branch never taken found in _Workspace_Handler_initialization (0x1073785776 -
> 0x1073785779)
> Calculate statistics
> Looking up source lines for uncovered ranges and branches
> Looking up source lines for uncovered ranges in CSWTCH.1
> terminate called after throwing an instance of 'rld::error'
> Aborted
> 
> --------------------
> GDB
> --------------------
> 
> (gdb) bt
> #0  0x00007ffff74aa428 in __GI_raise (sig=sig at entry=6)
>     at ../sysdeps/unix/sysv/linux/raise.c:54
> #1  0x00007ffff74ac02a in __GI_abort () at abort.c:89
> #2  0x00007ffff7ae484d in __gnu_cxx::__verbose_terminate_handler() ()
>    from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
> #3  0x00007ffff7ae26b6 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
> #4  0x00007ffff7ae2701 in std::terminate() ()
>    from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
> #5  0x00007ffff7ae2919 in __cxa_throw ()
>    from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
> #6  0x000000000042ad4a in rld::dwarf::address::path[abi:cxx11]() const (
>     this=this at entry=0x7fffffffcc10) at ../rtemstoolkit/rld-dwarf.cpp:129
> #7  0x000000000042dfad in rld::dwarf::file::get_source (this=this at entry=0x6be568,
>     addr=<optimized out>, source_file="unknown", source_line=@0x7fffffffccdc: -1)
>     at ../rtemstoolkit/rld-dwarf.cpp:860
> #8  0x000000000040d541 in Coverage::ExecutableInfo::getSourceAndLine (
>     this=this at entry=0x6be3c0, address=<optimized out>, line="")
>     at ../tester/covoar/ExecutableInfo.cc:134
> #9  0x000000000040a115 in Coverage::DesiredSymbols::determineSourceLines (
>     this=this at entry=0xafee70, theRanges=theRanges at entry=0xd626f0,
>     theExecutable=0x6be3c0) at ../tester/covoar/DesiredSymbols.cc:411
> #10 0x000000000040a24f in Coverage::DesiredSymbols::findSourceForUncovered (
>     this=0xafee70) at ../tester/covoar/DesiredSymbols.cc:440
> #11 0x0000000000406028 in main (argc=<optimized out>, argv=<optimized out>)
>     at ../tester/covoar/covoar.cc:526

This looks like an exception being thrown in a destructor path.

> 
> I'll attach a trace file I'm using to debug, hopefully you can use this. It has
> to go with hello.exe in the build directory

Thank you for this. I will try and see what I find.

Chris