[Bug bootstrap/14462] [3.5 Regression] a-calend.adb:396:33: warning: value not in range of type "Ada.Calendar.Day_Duration"

[dave at hiauly1 dot hia dot nrc dot ca]

------- Additional Comments From dave at hiauly1 dot hia dot nrc dot ca  2004-03-07 18:26 -------
Subject: Re:  [3.5 Regression] a-calend.adb:396:33: warning: value not in range of type "Ada.Calendar.Day_Duration"

> The change for pa.c looks fine to me, maybe it was somewhere else.  Also I have to agree with Paolo 
> about the Ada changes as they make it hard to regtest something.

Paolo's patch introduced the gnat1 segv.  Until we find out what's
causing the segv, I don't think we can say whether there is a problem
with the ada change.  We had an almost "identical" problem a few months
ago caused by an optimization problem.

I don't see a problem with the change to pa.c  I think there was some
change in Paolo's patch beyond the introduction of new macros.

I've looked at the segv a bit.  It's caused by a null value being
returned for a pointer.  I don't see any problem with the code.
The problem would appear to be related to the initialization/setting
of the "struct" that holds the pointer.  I don't know where this
is done.

(gdb) bt
#0  0x001737c0 in system__soft_links__get_sec_stack_addr_nt ()
    at ../../gcc/gcc/ada/s-soflin.adb:232
#1  0x00174500 in system__secondary_stack__ss_mark ()
    at ../../gcc/gcc/ada/s-secsta.adb:462
#2  0x0025dc2c in _ada_gnat1drv () at ../../gcc/gcc/ada/gnat1drv.ads:33
#3  0x004095bc in toplev_main (argc=6065464, argv=0x5c8d38)
    at ../../gcc/gcc/toplev.c:1575

0x001737bc <system__soft_links__get_sec_stack_addr_nt+0>:       addil 25d800,dp,%r1
0x001737c0 <system__soft_links__get_sec_stack_addr_nt+4>:       bv r0(rp)
0x001737c4 <system__soft_links__get_sec_stack_addr_nt+8>:       ldw 57c(,r1),ret0

(gdb) disass 0x001744f4 0x00174514
Dump of assembler code from 0x1744f4 to 0x174514:
0x001744f4 <system__secondary_stack__ss_mark+12>:       ldw 488(,r1),r22
0x001744f8 <system__secondary_stack__ss_mark+16>:       b,l 0x147dcc <osint__file_stamp_hash_table__tab__TtableBIPXb+5576>,r31
0x001744fc <system__secondary_stack__ss_mark+20>:       copy r31,rp
0x00174500 <system__secondary_stack__ss_mark+24>:       ldw -54(,sp),rp
0x00174504 <system__secondary_stack__ss_mark+28>:       ldw 0(,ret0),ret0
0x00174508 <system__secondary_stack__ss_mark+32>:       bv r0(rp)
0x0017450c <system__secondary_stack__ss_mark+36>:       ldo -40(sp),sp
0x00174510 <system__secondary_stack__ss_release+0>:     addil 1800,dp,%r1

The segv is at 0x00174504 following the return from
system__soft_links__get_sec_stack_addr_nt.  The call at 0x001744f8
is an indirect call.

Dave


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14462