[LLVMdev] Fwd: Building VMKit

[Joshua Warner]

On Tue, Jul 20, 2010 at 12:28 PM, Minas Abrahamyan <minas.subs at gmail.com>wrote:

> On Tue, Jul 20, 2010 at 6:56 PM, Joshua Warner <joshuawarner32 at gmail.com>
> wrote:
> > Hi Minas,
> >
> > I tried recompiling Classpath with -fno-omit-frame-pointer, and now,
> instead
> > of printing an error message, j3 just segfaults in
> > "j3::JnjvmClassLoader::loadClassFromAsciiz(char const*, bool, bool) ()"
> >
>
> Could you please run it under gdb like
> $ gdb --args ./j3 HelloWorld
> and print here backtrace at fall?
>
>
Below is the output of the gdb session:

$ gdb --args ./j3 HelloWorld
GNU gdb (GDB) 7.1-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html
>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/jowarner/code/vmkit/Release+Asserts/bin/j3...(no
debugging symbols found)...done.
(gdb) r
Starting program: /home/jowarner/code/vmkit/Release+Asserts/bin/j3
HelloWorld
[Thread debugging using libthread_db enabled]
[New Thread 0x1200ff700 (LWP 16322)]
[New Thread 0x1201ff700 (LWP 16323)]
[New Thread 0x1202ff700 (LWP 16324)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x1200ff700 (LWP 16322)]
0x000000000052d725 in j3::JnjvmClassLoader::loadClassFromAsciiz(char const*,
bool, bool) ()
(gdb) bt
#0  0x000000000052d725 in j3::JnjvmClassLoader::loadClassFromAsciiz(char
const*, bool, bool) ()
#1  0x0000000000558633 in FindClass(_Jv_JNIEnv*, char const*) ()
#2  0x00007ffff60d531d in JNI_OnLoad () from
/usr/lib/classpath/libjavanio.so
#3  0x000000000055d558 in callOnLoad ()
#4  0x0000000000569630 in Java_java_lang_VMRuntime_nativeLoad ()
#5  0x00007ffff7f07491 in ?? ()
#6  0x0000000000000000 in ?? ()
(gdb) list
1    events.c: No such file or directory.
    in events.c
(gdb) f 1
#1  0x0000000000558633 in FindClass(_Jv_JNIEnv*, char const*) ()
(gdb) list
1    in events.c
(gdb)


> > I ran llcj under strace and found that it is not even opening the input
> or
> > output files, but is otherwise running normally.
> Let's make things clear (to me):
> Have you pass these steps:
> http://vmkit.llvm.org/use_aot.html  - Java Ahead of Time (AOT) Compilation
> ?
>

I followed those instructions - no different result.


>
> If yes, how is it finished process of making glibj.zip into native code?
> I didn't pass it on my 64-bit machine. Interesting if you get there
>

I'm not sure what you mean.  There were no errors in the build, and both
llcj and vmcj seem otherwise functional (they both run and print usage
information just fine).


>
> > Updating to the latest SVN version (revision 108831) didn't change
> anything
> > (I was only a few days out of date).
> >
> > I'm not sure where to go from here.  Does this fit with any of the known
> > problems under 64-bit linux?
>
> Not know yet :)
>
> >
> > Thanks,
> > Joshua
>
> Thanks,
> Minas
>
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