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* [Bug bootstrap/31235] New: Bootstrap comparison failure with -gstabs
@ 2007-03-16 22:43 feri1024 at t-email dot hu
2007-03-16 22:50 ` [Bug bootstrap/31235] " joseph at codesourcery dot com
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: feri1024 at t-email dot hu @ 2007-03-16 22:43 UTC (permalink / raw)
To: gcc-bugs
Configured and built with:
../gcc-4.2-20070221/configure --enable-languages=c --enable-bootstrap
--disable-nls && make BOOT_CFLAGS="-gstabs"
The result is:
[...]
Comparing stages 2 and 3
warning: ./cc1-checksum.o differs
Bootstrap comparison failure!
./dbxout.o differs
./insn-emit.o differs
./varasm.o differs
[...]
I recompiled these sources with stage 2 and stage 3 compilers into assembly,
for dbxout.c I got the following:
--- dbxout-stage2.s 2007-03-16 21:27:01.000000000 +0100
+++ dbxout-stage3.s 2007-03-16 21:29:42.000000000 +0100
@@ -14245,12 +14245,12 @@
leave
ret
.size dbxout_block, .-dbxout_block
- .stabs "begin_label:(0,39)=ar(5,28);0;19;(0,2)",128,0,0,-52
+ .stabs "begin_label:(0,30)",128,0,0,-52
.stabn 192,0,0,.LFBB69-.LFBB69
.stabs "did_output:(0,1)",128,0,0,-32
.stabs "blocknum:(0,1)",128,0,0,-28
.stabn 192,0,0,.LBB180-.LFBB69
- .stabs "buf:(0,39)",128,0,0,-72
+ .stabs "buf:(0,30)",128,0,0,-72
.stabs "scope_start:(10,36)",128,0,0,-24
.stabn 192,0,0,.LBB181-.LFBB69
.stabs "decl:(47,10)",128,0,0,-20
The other files differ in the same manner. It's very similar to
http://gcc.gnu.org/ml/gcc/2001-09/msg00882.html.
--
Summary: Bootstrap comparison failure with -gstabs
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: feri1024 at t-email dot hu
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31235
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug bootstrap/31235] Bootstrap comparison failure with -gstabs
2007-03-16 22:43 [Bug bootstrap/31235] New: " feri1024 at t-email dot hu
@ 2007-03-16 22:50 ` joseph at codesourcery dot com
2007-03-31 1:23 ` wilson at gcc dot gnu dot org
2007-03-31 1:24 ` wilson at gcc dot gnu dot org
2 siblings, 0 replies; 5+ messages in thread
From: joseph at codesourcery dot com @ 2007-03-16 22:50 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from joseph at codesourcery dot com 2007-03-16 22:50 -------
Subject: Re: New: Bootstrap comparison failure with
-gstabs
On Fri, 16 Mar 2007, feri1024 at t-email dot hu wrote:
> Configured and built with:
>
> ../gcc-4.2-20070221/configure --enable-languages=c --enable-bootstrap
> --disable-nls && make BOOT_CFLAGS="-gstabs"
>
> The result is:
>
> [...]
> Comparing stages 2 and 3
> warning: ./cc1-checksum.o differs
> Bootstrap comparison failure!
> ./dbxout.o differs
> ./insn-emit.o differs
> ./varasm.o differs
The symptoms, including the need for a special BOOT_CFLAGS when
configuring to trigger a bootstrap failure and the list of miscomparing
files, seem just the same as the case I analysed and reported today as
bug 31230.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31230
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31235
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug bootstrap/31235] Bootstrap comparison failure with -gstabs
2007-03-16 22:43 [Bug bootstrap/31235] New: " feri1024 at t-email dot hu
2007-03-16 22:50 ` [Bug bootstrap/31235] " joseph at codesourcery dot com
@ 2007-03-31 1:23 ` wilson at gcc dot gnu dot org
2007-03-31 1:24 ` wilson at gcc dot gnu dot org
2 siblings, 0 replies; 5+ messages in thread
From: wilson at gcc dot gnu dot org @ 2007-03-31 1:23 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from wilson at gcc dot gnu dot org 2007-03-31 02:23 -------
I was able to reproduce this on an x86_64-linux machine following the
instructions.
Assuming this is the same conceptual problem as 31230, I tried the same patch,
in another file. Just marking the array type domain type as used so it
wouldn't be garbage collected. It was a little harder here since we didn't
have a convenient subroutine to call, so I had to move some code out of
dbxout_type into a new function, but effectively there is only a one line
actual code change here.
This survived a C-only BOOT_CFLAGS=-gstabs bootstrap, which seems to be good
evidence that it is working.
This patch is otherwise untested. It needs a full bootstrap, gcc testsuite
run, and gdb testsuite run.
--
wilson at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2007-03-31 02:23:00
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31235
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug bootstrap/31235] Bootstrap comparison failure with -gstabs
2007-03-16 22:43 [Bug bootstrap/31235] New: " feri1024 at t-email dot hu
2007-03-16 22:50 ` [Bug bootstrap/31235] " joseph at codesourcery dot com
2007-03-31 1:23 ` wilson at gcc dot gnu dot org
@ 2007-03-31 1:24 ` wilson at gcc dot gnu dot org
2 siblings, 0 replies; 5+ messages in thread
From: wilson at gcc dot gnu dot org @ 2007-03-31 1:24 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from wilson at gcc dot gnu dot org 2007-03-31 02:24 -------
Created an attachment (id=13305)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13305&action=view)
Mark array TYPE_DOMAIN as used to prevent garbage collection.
This has been tested with a C only BOOT_CFLAGS=-gstabs bootstrap. It needs a
full bootstrap, gcc testsuite run, and gdb testsuite run.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31235
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-12-01 1:31 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2021-03-20 22:37 ` [Bug bootstrap/31235] Bootstrap comparison failure with -gstabs egallager at gcc dot gnu.org
2022-12-01 1:31 ` pinskia at gcc dot gnu.org
2007-03-16 22:43 [Bug bootstrap/31235] New: " feri1024 at t-email dot hu
2007-03-16 22:50 ` [Bug bootstrap/31235] " joseph at codesourcery dot com
2007-03-31 1:23 ` wilson at gcc dot gnu dot org
2007-03-31 1:24 ` wilson at gcc dot gnu dot org
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