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Subject: Re: GDB 7.5 on OS X 10.7
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From: Tristan Gingold <gingold@adacore.com>
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Date: Fri, 31 Aug 2012 09:19:00 -0000
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To: Kaushik Srenevasan <ks@sysenter.org>
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On Aug 31, 2012, at 6:37 AM, Kaushik Srenevasan wrote:

> Is GDB (7.5) known to work on OS X 10.7? I compiled it from GIT with
> all defaults except the prefix but don't seem to be able to get even
> the basic commands (bt, break) to work.

Yes, it is known to work (I use it every days).  However there is still man=
y issues because it is not heavily used.
In particular, I rarely debug dylibs.

Tristan.

>=20
>  file ~/src/jdk7/build/macosx-x86_64-debug/bin/java
>  set args -classpath ~/src/tmp helloworld
>  catch load libjvm
>=20
> Catchpoint 1
>  Inferior loaded
> /Users/ks/src/jdk7/build/macosx-x86_64-debug/lib/server/libjvm.dylib
> 0x00007fff5fc0b269 in ?? ()
> (gdb) bt
> #0  0x00007fff5fc0b269 in ?? ()
> #1  0x00007fff5fc0b24d in ?? ()
> #2  0x00000001000d1a50 in ?? ()
> #3  0x00007fff5fc3b560 in ?? ()
> #4  0x00000001000d1f20 in ?? ()
> #5  0x00007fff5fc0540e in ?? ()
> #6  0x0000000101800000 in ?? ()
> #7  0x0000000100200300 in ?? ()
> #8  0x0000000050403138 in ?? ()
> #9  0x00007fff5fc052ea in ?? ()
> #10 0x0000000100200260 in ?? ()
> #11 0x00000001000d1ae8 in ?? ()
> #12 0x0000000000000000 in ?? ()
> (gdb) break LRG::set_mask
> Cannot access memory at address 0x141be0
>=20
> It looks like break was able to find the symbol's address. The address
> however looks suspect to me. The target (if that matters) is a debug
> build of the OpenJDK.
>=20
>            --- Kaushik