[Bug ada/42141] New: ACATS C9A009G failure

[gcc at coreland dot ath dot cx]

Version was marked as 4.5.0 but is really SVN r154285.

Currently, C9A009G seems to be failing due to a segmentation fault.

Other tests failed in the last build at:

http://gcc.coreland.ath.cx/r154285_2009-11-18_103532/

...but this appeared to be the simplest.

A backtrace from gdb:

(gdb) r
Starting program: /gnat/svn/obj/c9a009g 
[New LWP 100782]
[New Thread 0x800a020b0 (LWP 100782)]
[New Thread 0x800a02240 (LWP 100608)]

,.,. C9A009G ACATS 2.5 09-11-22 11:15:41
---- C9A009G MASTER COMPLETED BUT NOT TERMINATED.
[New Thread 0x800a023d0 (LWP 101454)]
[New Thread 0x800b0b0b0 (LWP 101455)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x800b0b0b0 (LWP 101455)]
0x00007fffff9fdb69 in ?? ()
(gdb) bt
#0  0x00007fffff9fdb69 in ?? ()
#1  0x000000000040f600 in system__tasking__stages__task_wrapper
(self_id=0x800b04000) at s-tassta.adb:1190
#2  0x00000008006774d1 in pthread_getprio () from /lib/libthr.so.3
#3  0x0000000000000000 in ?? ()
Error accessing memory address 0x7fffff7fd000: Bad address.

Stepping through the code with the following breakpoints:

Num     Type           Disp Enb Address            What
1       breakpoint     keep y   <MULTIPLE>         0x0000000000407559
        breakpoint already hit 3 times
1.1                         y     0x0000000000407559 in c9a009g at
c9a009g.adb:34
1.2                         y     0x0000000000407559 in c9a009g at
c9a009g.adb:34
1.3                         y     0x0000000000407609 in c9a009g at
c9a009g.adb:34
2       breakpoint     keep y   0x000000000040f485 in
system.tasking.stages.task_wrapper at s-tassta.adb:1006
        breakpoint already hit 3 times

Got me as far as:

Breakpoint 2, system.tasking.stages.task_wrapper (self_id=0x800b04000) at
s-tassta.adb:1006
...
1190             Self_ID.Common.Task_Entry_Point (Self_ID.Common.Task_Arg);

The next step caused the program to segfault.


-- 
           Summary: ACATS C9A009G failure
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ada
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gcc at coreland dot ath dot cx
  GCC host triplet: x86_64-unknown-freebsd7.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42141