[Bug middle-end/44690] -fzero-initialized-in-bss does not work

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44690

Andrew Pinski  changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution|--- |FIXED
   Target Milestone|--- |8.0

--- Comment #4 from Andrew Pinski  ---
Fixed by r8-2857-g2ec399d8a6c9c26 (there was a few followups patches which fix
problems with this patch too).

[Bug middle-end/44690] -fzero-initialized-in-bss does not work

[jan dot kratochvil at redhat dot com]

--- Comment #3 from jan dot kratochvil at redhat dot com  2010-07-23 11:11 
---
(In reply to comment #1)
 const int i; -fno-zero-initialized-in-bss - .bss= FAIL
 You need -fno-common also to get it out of the BSS.

-fno-common now at least correctly reports:
echo 'const int i;'|gcc -fno-common -c -o k.o -x c -;echo 'const int
i;main(){}'|gcc -fno-common -c -o l.o -x c -;gcc -fno-common -o k k.o l.o
l.o:(.bss+0x0): multiple definition of `i'
k.o:(.bss+0x0): first defined here

So it is no longer SHN_COMMON, thanks.


But reopening the Bug as it is still in .bss, not in .rodata.

echo 'const int i;int main(){return *(int *)i = 0;}'|gcc -fno-common -Wall -o
1 -x c -;./1;echo $?
0
  [25] .bss  NOBITS   00600818  0814
   0018    WA   0 0 8
   Num:Value  Size TypeBind   Vis  Ndx Name
55: 00600828 4 OBJECT  GLOBAL DEFAULT   25 i

It should SEGV but it does not.
-f{,no-}zero-initialized-in-bss has no effect on it.


-- 

jan dot kratochvil at redhat dot com changed:

   What|Removed |Added

 Status|RESOLVED|UNCONFIRMED
 Resolution|INVALID |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44690

[Bug middle-end/44690] -fzero-initialized-in-bss does not work

[pinskia at gcc dot gnu dot org]

--- Comment #1 from pinskia at gcc dot gnu dot org  2010-07-21 22:23 ---
const int i; -fno-zero-initialized-in-bss - .bss= FAIL
You need -fno-common also to get it out of the BSS.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44690

[Bug middle-end/44690] -fzero-initialized-in-bss does not work

[pinskia at gcc dot gnu dot org]

--- Comment #2 from pinskia at gcc dot gnu dot org  2010-07-21 22:56 ---
const int i = 0;-fzero-initialized-in-bss - .rodata = FAIL

This is correct because it should really be in readonly data section as it is
constant.


-- 

pinskia at gcc dot gnu dot org changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution||INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44690