[fedora-java] rawhide issues

[Andrew Haley]

Andrew Haley writes:
 > Andrew Haley writes:
 >  > Anthony Green writes:
 >  >  > I see the following issues with rawhide (on x86) right now...
 >  >  > 
 >  >  > * I'm not getting any stack traces, just <<No stacktrace available>>
 >  >  > 
 >  >  > 
 >  >  > * Eclipse fails and the log contains the following errors (with no
 >  >  > stacktraces):
 >  >  > 
 >  >  > java.lang.IllegalAccessError: org.xml.sax.helpers.NamespaceSupport$Context: org.xml.sax.helpers.NamespaceSupport.EMPTY_ENUMERATION
 >  >  > 
 >  >  > java.lang.Exception: Cannot initialize Update Configurator
 >  >  > 
 >  >  > java.lang.IllegalStateException: Bundle initial at reference:file:plugins/org.eclipse.core.runtime_3.1.1.jar/ [1] is not active.
 >  >  > 
 >  >  > 
 >  >  > * aot-compile-rpm is using -mcpu=i686, but -mcpu is deprecated in GCC 4.1.  I can't see where this comes from.
 >  >  > 
 >  >  > 
 >  >  > Any ideas?
 >  > 
 >  > gcc is emitting bad unwinder data for some routines.  This isn't a bug
 >  > in the gcc unwinder itself, because gdb has the same problems.  Look
 >  > at Frame 7 and Frame 9:
 > 
 > BTW, I don't have this problem when building gcc from FSF sources.

You'll have to make your window hugely wide to read this mail.

Here's the difference.  On the left, we have gcc version 4.1.0 20051212 (prerelease), 
on the right we have gcc version 4.1.0 20051214 (Red Hat 4.1.0-0.9)

The one on the right is the one that works.

You'll note that the bad one uses three push instructions and then
sets CFA offset to 12.  This is wrong AFAICS: the original CFA offset
at function entry is 4, so if you push three registers, the CFA offset
should be 16.  The code on the right subtracts 12 from sp --
allocating three words -- and then sets CFA offset to 16.  This one is
correct, and we get a Java stacktrace.

Both built on the same box.  However, the 4.1 build was
i686-pc-linux-gnu, and the RPM build was i386-pc-linux-gnu.  I'm
guessing that is the *real* difference, and I'm investigating building
4.1 branch with host=i386-pc-linux-gnu.

Andrew.


00a328f8 <java.lang.Throwable.Throwable(java.lang.String)>:                                                       00a50db0 <java.lang.Throwable.Throwable(java.lang.String)>:							    
  a328f8:       56                      push   %esi								    a50db0:       83 ec 0c                sub    $0xc,%esp							    
  a328f9:       53                      push   %ebx								    a50db3:       89 5c 24 04             mov    %ebx,0x4(%esp)							    
  a328fa:       50                      push   %eax								    a50db7:       e8 a9 41 dc ff          call   814f65 <__i686.get_pc_thunk.bx>					    
  a328fb:       e8 00 00 00 00          call   a32900 <java.lang.Throwable.Throwable(java.lang.String)+0x8>	    a50dbc:       81 c3 fc 5d 6f 00       add    $0x6f5dfc,%ebx							    
  a32900:       5b                      pop    %ebx								    a50dc2:       89 74 24 08             mov    %esi,0x8(%esp)							    
  a32901:       81 c3 20 9b 65 00       add    $0x659b20,%ebx							    a50dc6:       8b 74 24 10             mov    0x10(%esp),%esi							    
  a32907:       8b 74 24 10             mov    0x10(%esp),%esi							    a50dca:       89 34 24                mov    %esi,(%esp)							    
  a3290b:       89 34 24                mov    %esi,(%esp)							    a50dcd:       e8 36 14 dc ff          call   812208 <java.lang.Object.Object()@plt>				    
  a3290e:       e8 8d ed dd ff          call   8116a0 <java.lang.Object.Object()@plt>				    a50dd2:       89 34 24                mov    %esi,(%esp)							    
  a32913:       89 34 24                mov    %esi,(%esp)							    a50dd5:       e8 6e a7 da ff          call   7fb548 <java.lang.Throwable.finit$()@plt>			    
  a32916:       e8 c5 82 dc ff          call   7fabe0 <java.lang.Throwable.finit$()@plt>			    a50dda:       8b 06                   mov    (%esi),%eax							    
  a3291b:       8b 06                   mov    (%esi),%eax							    a50ddc:       89 34 24                mov    %esi,(%esp)							    
  a3291d:       89 34 24                mov    %esi,(%esp)							    a50ddf:       ff 50 3c                call   *0x3c(%eax)							    
  a32920:       ff 50 3c                call   *0x3c(%eax)							    a50de2:       8b 44 24 14             mov    0x14(%esp),%eax							    
  a32923:       8b 44 24 14             mov    0x14(%esp),%eax							    a50de6:       89 46 04                mov    %eax,0x4(%esi)							    
  a32927:       89 46 04                mov    %eax,0x4(%esi)							    a50de9:       8b 5c 24 04             mov    0x4(%esp),%ebx							    
  a3292a:       5e                      pop    %esi								    a50ded:       8b 74 24 08             mov    0x8(%esp),%esi							    
  a3292b:       5b                      pop    %ebx								    a50df1:       83 c4 0c                add    $0xc,%esp							    
  a3292c:       5e                      pop    %esi								    a50df4:       c3                      ret    									    
  a3292d:       c3                      ret    									
														
00058f08 0000001c 0003252c FDE cie=000269e0 pc=00a328f8..00a3292e						  														    
  Augmentation data:     00 00 00 00										  00053714 0000001c 0002f1f4 FDE cie=00024524 pc=00a50d90..00a50db0						    
														    Augmentation data:     00 00 00 00										    
  DW_CFA_advance_loc: 1 to 00a328f9										  														    
  DW_CFA_def_cfa_offset: 8											    DW_CFA_advance_loc: 1 to 00a50d91										    
  DW_CFA_advance_loc: 1 to 00a328fa										    DW_CFA_def_cfa_offset: 8											    
  DW_CFA_def_cfa_offset: 12											    DW_CFA_offset: r3 at cfa-8											    
  DW_CFA_offset: r3 at cfa-12											    DW_CFA_advance_loc: 14 to 00a50d9f										    
  DW_CFA_offset: r6 at cfa-8											    DW_CFA_def_cfa_offset: 16											    
  DW_CFA_nop													    DW_CFA_nop													    
														    DW_CFA_nop													    
00058f08 0000001c 0003252c FDE cie=000269e0 pc=00a328f8..00a3292e						    DW_CFA_nop													    
   LOC   CFA      r3   r6   ra   										  														    
00a328f8 r4+4     u    u    c-4  										  
00a328f9 r4+8     u    u    c-4  										  00053714 0000001c 0002f1f4 FDE cie=00024524 pc=00a50d90..00a50db0	   
00a328fa r4+12    c-12 c-8  c-4  										     LOC   CFA      r3   ra   						   
														  00a50d90 r4+4     u    c-4  						   
														  00a50d91 r4+8     c-8  c-4  						   
														  00a50d9f r4+16    c-8  c-4