https://sourceware.org/bugzilla/show_bug.cgi?id=18865
Bug ID: 18865
Summary: ICF --keep-unique doesn't work correctly
Product: binutils
Version: 2.26 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: gold
Assignee: ccoutant at gmail dot com
Reporter: mail at tzik dot jp
CC: ian at airs dot com
Target Milestone: ---
ICF --keep-unique doesn't work correctly when a symbol is folded *into* the
--keep-unique'ed symbol.
A repro case is below:
$ cat > foo.c <<EOF
void f() {}
void g() {}
int main() {return 0;}
EOF
$ clang -fuse-ld=gold -Wl,--icf=all -ffunction-sections -Wl,--keep-unique=f -o
foo foo.c
$ nm -n foo | grep 'T .$'
The output of above was like this:
> 0000000000400580 T f
> 0000000000400580 T g
Where the address of f is expected to be unique.
I think this is due to the implementation of Icf::unfold_section.
It prevents a section (f) is folded into another section (g), though doesn't
prevents opposite, another section (g) is folded into the specified section
(f).
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
bug-binutils mailing list
bug-binutils@gnu.org
https://lists.gnu.org/mailman/listinfo/bug-binutils
