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Re: status of Darwin support
Joel Brobecker wrote:
>> Joel would probably know. My best guess is that even if Darwin support
>> is much better now, the MI incompatibilities would mean that you
>> wouldn't be able to drop FSF's GDB in place of Apple's for Xcode.
>
> Actually, I won't know that much more. Tristan is the one who looks
> after that port. As far as I know, we're using it internally, to
> debug GNAT for instance, and it seems to be working well. Thiago
> is right about the bunch of local additions that Apple made to GDB,
> though.
Hmm, I have problems with shared libraries. One thing is that the
shared library is only found when it's in the current directory,
otherwise:
(gdb) r
Starting program: /Users/twisti/bsd-port/hotspot/build/bsd/bsd_i486_compiler2/jvmg/gamma
dyld: Library not loaded: libjvm.dylib
Referenced from: /Users/twisti/bsd-port/hotspot/build/bsd/bsd_i486_compiler2/jvmg/gamma
Reason: image not found
Even if the path to the library is in DYLD_LIBRARY_PATH. The other
problem is that debugging symbols for shared libraries are not loaded.
I can set a breakpoint in the main executable and debug it:
(gdb) c
Continuing.
Breakpoint 2, CreateExecutionEnvironment (_argcp=0xbffff630, _argvp=0xbffff634, jrepath=0xbffff194 "", so_jrepath=1024, jvmpath=0xbfffed94 "", so_jvmpath=1024,
original_argv=0x1005c0) at /Users/twisti/bsd-port/hotspot/src/os/bsd/launcher/java_md.c:238
238 char *execname = NULL;
(gdb) bt
#0 CreateExecutionEnvironment (_argcp=0xbffff630, _argvp=0xbffff634, jrepath=0xbffff194 "", so_jrepath=1024, jvmpath=0xbfffed94 "", so_jvmpath=1024, original_argv=0x1005c0)
at /Users/twisti/bsd-port/hotspot/src/os/bsd/launcher/java_md.c:238
#1 0x00001ce6 in main (argc=2, argv=0xbffff654) at /Users/twisti/bsd-port/hotspot/src/os/bsd/launcher/java.c:250
But an assert in the shared library gives:
Current thread is 2954858496
Dumping core ...
[New Thread 0x1f03 of process 71094]
[New Thread 0x2003 of process 71094]
[New Thread 0x2103 of process 71094]
[New Thread 0x2203 of process 71094]
[New Thread 0x2303 of process 71094]
[New Thread 0x2403 of process 71094]
Program received signal SIGABRT, Aborted.
0x95bd046e in ?? ()
(gdb) info threads
7 Thread 0x2403 of process 71094 0x95bd046e in ?? ()
6 Thread 0x2303 of process 71094 0x95ca5136 in ?? ()
5 Thread 0x2203 of process 71094 0x95bc92c2 in ?? ()
4 Thread 0x2103 of process 71094 0x95bd046e in ?? ()
3 Thread 0x2003 of process 71094 0x95bd046e in ?? ()
2 Thread 0x1f03 of process 71094 0x95bd046e in ?? ()
* 1 Thread 0x1d03 of process 71094 0x95bd046e in ?? ()
(gdb) bt
#0 0x95bd046e in ?? ()
#1 0x95bfb3e6 in ?? ()
#2 0x00001803 in ?? ()
#3 0x00001903 in ?? ()
#4 0x00000000 in ?? ()
And yes, it has debugging symbols. Anything I can do to change that?
-- Christian