Re: [PATCH/i386newframe] amd64newframe

[Elena Zannoni <ezannoni at redhat dot com>]

Mark Kettenis writes:
 > Folks,
 > 
 > I've checked in on my i386newframe branch a major overhaul of the
 > x86-64 (sub)target to make it fit into the new frame unwindig
 > framework.  I've tried very hard to reduce the gratuitous differences
 > between the i386 and x86_64 stuff, and cleaned things up quite a bit.
 > However, this code is *untested*.  The code compiles, that is, I can
 > build a x86_64-linux cross-debugger on my i386-unknown-freebsd4.7
 > system (actually I can't since the final link fails because of a
 > problem with the way we do our shared library support).  It would be
 > great if someone could provide me with access to an amd64 system.  If
 > it's running *BSD, I can probably add the necessary support for it to
 > GDB.  Otherwise I'd appreciate it if someone could test this code on
 > x86_64-linux.
 > 
 > Mark
 > 
 > 
 > Index: ChangeLog
 > from  Mark Kettenis  <kettenis@gnu.org>
 >  
 > 	Revise the x86_64 (sub)taget.
                              ^^^^^^^
                               typo (meager contribution...:)

I don't know if I can grant you access to some hardware, I'll see what
I can do.  However I have tried to run the gdb testsuite.

It is not running too well, I had to kill it because it was hanging,
like this below:



Breakpoint 26, marker2 (a=99) at /home/ezannoni/kettenis-branch/src/gdb/testsuite/gdb.base/break.c:49
49      int marker2 (a) int a; { return (1); }
The program being debugged stopped while in a function called from GDB.
When the function (marker2) is done executing, GDB will silently
stop (instead of continuing to evaluate the expression containing
the function call).
(gdb) PASS: gdb.base/break.exp: hit breakpoint on called function
bt
#0  marker2 (a=99) at /home/ezannoni/kettenis-branch/src/gdb/testsuite/gdb.base/break.c:49
#1  <function called from gdb>
This frame inner-to next frame (corrupt stack?)
(gdb) PASS: gdb.base/break.exp: backtrace while in called function
finish
Run till exit from #0  marker2 (a=99) at /home/ezannoni/kettenis-branch/src/gdb/testsuite/gdb.base/break.c:49
/home/ezannoni/kettenis-branch/src/gdb/dummy-frame.c:317: internal-error: dummy_frame_prev_register: Assertion `dummy != NULL' failed.
A problem internal to GDB has been detected.  Further
debugging may prove unreliable.
Quit this debugging session? (y or n) FAIL: gdb.base/break.exp: (timeout) finish from called function
delete breakpoints
Please answer y or n.
Quit this debugging session? (y or n) ERROR: Delete all breakpoints in delete_breakpoints (timeout)
break main
Please answer y or n.
Quit this debugging session? (y or n) UNRESOLVED: gdb.base/break.exp: setting breakpoint at main (timeout)


I get the same internal error also in the inferior function calls tests:

(gdb) PASS: gdb.base/call-ar-st.exp: run until breakpoint set at a line
print print_double_array(double_array)
array_d :
=========

0.000000  
23.456700  46.913400  70.370100  93.826800  117.283500  140.740200  164.196900  187.653600  


/home/ezannoni/kettenis-branch/src/gdb/dummy-frame.c:317: internal-error: dummy_frame_prev_register: Assertion `dummy != NULL' failed.
A problem internal to GDB has been detected.  Further
debugging may prove unreliable.
Quit this debugging session? (y or n) FAIL: gdb.base/call-ar-st.exp: print print_double_array(double_array) (pattern 5 + sentinel) (timeout)
print print_char_array(char_array)



(gdb) p t_char_values(0,0)
/home/ezannoni/kettenis-branch/src/gdb/dummy-frame.c:317: internal-error: dummy_frame_prev_register: Assertion `dummy != NULL' failed.
A problem internal to GDB has been detected.  Further
debugging may prove unreliable.
Quit this debugging session? (y or n) ERROR: Got interactive prompt.
UNRESOLVED: gdb.base/callfuncs.exp: p t_char_values(0,0)



print 'A' == iso_8859_1_string[8]
$9 = 0
(gdb) FAIL: gdb.base/charset.exp: check value of parsed character literal in ISO-8859-1
print "abcdefABCDEF012345"
/home/ezannoni/kettenis-branch/src/gdb/dummy-frame.c:317: internal-error: dummy_frame_prev_register: Assertion `dummy != NULL' failed.
A problem internal to GDB has been detected.  Further
debugging may prove unreliable.
Quit this debugging session? (y or n) Please answer y or n.
Quit this debugging session? (y or n) Create a core file of GDB? (y or n) Please answer y or n.
Create a core file of GDB? (y or n) Please answer y or n.
Create a core file of GDB? (y or n) ERROR: Got interactive prompt.
UNRESOLVED: gdb.base/charset.exp: parse string literal in ISO-8859-1
ERROR: Got interactive prompt.


It seems to occur at any inferior function call.


Let me see if I can dig further.

elena