[lldb-dev] Failing BreakpointIDTestCase

[Filipe Cabecinhas]

It's not that I think the bug will be forgotten (I don't), but if it's
mostly related to clang trunk, I think the best place would be llvm.org/bugs
.

But thanks for confirming and filing it.

Regards,

  Filipe



On Mon, Oct 29, 2012 at 10:17 AM, Greg Clayton <gclayton at apple.com> wrote:

> Filipe, thanks for pointing this out. I filed a bug on this internally
> here at apple (<rdar://problem/12592135>).
>
> Greg
>
> On Oct 26, 2012, at 12:28 PM, Filipe Cabecinhas <filcab at gmail.com> wrote:
>
> > So, we have a problem with the debug information:
> >
> > There are two TAG_inlined_subroutine DIEs for the ToT clang, one of them
> with an AT_ranges.
> > For the Xcode clang, we have three DIEs (which makes sense, since we
> have three sum() calls).
> >
> > Example lldb interaction:
> > Compiled with make CC=$(xcrun -f clang)
> > ± ../../../../build/Debug/lldb a.out
> > Current executable set to 'a.out' (x86_64).
> > (lldb) b sum
> > Breakpoint 1: 3 locations.
> > (lldb) breakpoint list
> > Current breakpoints:
> > 1: name = 'sum', locations = 3
> >   1.1: where = a.out`foo(int, int) + 99 [inlined] sum(int, int) at
> main.cpp:49, address = 0x0000000100000d43, unresolved, hit count = 0
> >   1.2: where = a.out`foo(int, int) + 131 [inlined] sum(int, int) at
> main.cpp:51, address = 0x0000000100000d63, unresolved, hit count = 0
> >   1.3: where = a.out`foo(int, int) + 155 [inlined] sum(int, int) at
> main.cpp:51, address = 0x0000000100000d7b, unresolved, hit count = 0
> >
> >
> > Compiled with make (clang is ToT):
> > ± ../../../../build/Debug/lldb a.out
> > Current executable set to 'a.out' (x86_64).
> > (lldb) b sum
> > Breakpoint 1: where = a.out`foo(int, int) + 99 [inlined] sum(int, int)
> at main.cpp:49, address = 0x0000000100000d43
> > (lldb) breakpoint list
> > Current breakpoints:
> > 1: name = 'sum', locations = 1
> >   1.1: where = a.out`foo(int, int) + 99 [inlined] sum(int, int) at
> main.cpp:49, address = 0x0000000100000d43, unresolved, hit count = 0
> >
> > So, should we bring this to the clang bugs page?
> > I'm sending the dwarfdump of both files attached.
> >
> > Regards,
> >
> >   Filipe
> >
> >
> >
> > On Fri, Oct 26, 2012 at 12:19 PM, Filipe Cabecinhas <filcab at gmail.com>
> wrote:
> > Hi Jim,
> >
> > I just did an update to lldb and re-ran the test. Same result...
> >
> > But...
> >
> > If I use Xcode's clang (by passing -C $(xcrun -f clang)), it works.
> > If I use ToT clang (just updated and ran make install), it fails.
> >
> > Attached are both log files. The problem is that, with ToT clang,
> breakpoint location 2.2 doesn't exist. Only 2.1.
> >
> > Regards,
> >
> >   Filipe
> >
> >
> >
> >
> > On Thu, Oct 25, 2012 at 5:55 PM, Jim Ingham <jingham at apple.com> wrote:
> > This test case succeeds for me using TOT lldb and some fairly recent
> clang.  So it looks like the failure is due to some bug or difference in
> the debug output.  It would be easier to figure out what is going on if I
> could reproduce the failure.  What clang version are you using?
> >
> > Jim
> >
> >
> > On Oct 25, 2012, at 4:41 PM, Filipe Cabecinhas <filcab at gmail.com> wrote:
> >
> > > Hi all,
> > >
> > > This test-case is failing (Mac OS X Mountain Lion, latest Xcode
> released, built using xcodebuild):
> > > ./dotest.py -v -d -A x86_64 -C clang -v -t -f
> BreakpointIDTestCase.test_with_dsym
> > >
> > > From what I can tell, after LLDB finds the DIE that has the inlined
> sum() function, it stops looking, although there is another inlined sum()
> function.
> > > With that, the breakpoint will only resolve to one location.
> > >
> > > At least I think that is what's happening. I'm not an expert on DWARF
> ;-)
> > >
> > > Could you have a look at it, please?
> > >
> > > Thanks,
> > >
> > >   Filipe
> > >
> > > _______________________________________________
> > > lldb-dev mailing list
> > > lldb-dev at cs.uiuc.edu
> > > http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
> >
> >
> >
> >
> >
> <dwarfdump-ToT-clang.log><dwarfdump-Xcode-clang.log>_______________________________________________
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> > lldb-dev at cs.uiuc.edu
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>
>
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