ld version 2.16.1 crashes due to a null pointer when trying to report a warning
related to a gcc object file compiled with -fopenmp. The offending line in
2.16.1 is bfd.c:481, where abfd is NULL:
if (p[1] == 'B')
{
bfd *abfd = va_arg (ap, bfd *);
if (abfd->my_archive)
snprintf (bufp, avail, "%s(%s)",
abfd->my_archive->filename, abfd->filename);
This bug can be reproduced using as follows, using the 2 files ctp.c and
csimple.c, and gcc 4.2.0 20060601. (The ld -r line is necessary here.)
(776)% cat ctp.c
float matrix;
void ctp()
{
#pragma omp threadprivate(matrix)
matrix = 0.0;
}
(777)% cat csimple.c
void ctp();
int main()
{
ctp();
return 0;
}
(778)% gcc -fopenmp -c ctp.c
(779)% ld -r ctp.o -o ctpr.o
(780)% gcc -fopenmp csimple.c ctp.o
(781)% gcc -fopenmp csimple.c ctpr.o
collect2: ld terminated with signal 11 [Segmentation fault], core dumped
ld: (782)%
I modified bfd.c so I could get the error message that should have been printed,
which was:
(792)% gcc -fopenmp csimple.c ctpr.o
ld: Warning: alignment 1 of symbol `matrix' in
abfd->my_archive->filename(abfd->filename) is smaller than 4 in ctpr.o
--
Summary: Segmentation fault in bfd.c during error handling
Product: binutils
Version: 2.16
Status: NEW
Severity: normal
Priority: P2
Component: binutils
AssignedTo: unassigned at sources dot redhat dot com
ReportedBy: langton at gcc dot gnu dot org
CC: bug-binutils at gnu dot org
GCC build triplet: i686-pc-linux
GCC host triplet: i686-pc-linux
GCC target triplet: i686-pc-linux
http://sourceware.org/bugzilla/show_bug.cgi?id=2735
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