https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89702
Bug ID: 89702
Summary: 03 issue with SIGALRM causes program to SEGV on
Solaris
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: karl.burgess at oracle dot com
Target Milestone: ---
Created attachment 45959
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45959&action=edit
Program source files
I have a program which compiles and works ok with -O1, but when I compile with
-O3 the program crashes.
The platform Solaris SunOS 5.10 is significant. The program works fine when
compiled with -O3 on Linux.
The key thing in the program to reproduce the crash is to have a SIGALRM signal
handled during the execution of the optimized function ConvertUTF8toUTF16().
Setting the input buffer large enough for that function to take longer to
execute is important.
Steps to reproduce the bug:
-bash-3.2$ uname -a
SunOS bazalgette.uk.oracle.com 5.10 Generic_150401-63 i86pc i386 i86pc Solaris
-bash-3.2$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/opt/tarantella/libexec/gcc/i386-pc-solaris2.10/4.8.0/lto-wrapper
Target: i386-pc-solaris2.10
Configured with: ../gcc-4.8.0/configure --with-fpmath=sse
--disable-sjlj-exceptions --with-gnu-as --with-as=/opt/tarantella/bin/as
--without-gnu-ld --with-ld=/usr/ccs/bin/ld --with-system-zlib
--build=i386-pc-solaris2.10 --host=i386-pc-solaris2.10
--with-boot-ldflags=-Wl,-R,/opt/tarantella/lib --disable-werror
--disable-silent-rules --enable-multilib --prefix=/opt/tarantella
--with-gmp=/opt/tarantella/ --with-mpfr=/opt/tarantella/
--with-mpc=/opt/tarantella/ --enable-threads=posix --enable-libgomp
--enable-languages=c,c++ --with-cloog=/opt/tarantella/
--with-isl=/opt/tarantella/ --with-libelf=/opt/tarantella/ --disable-nls
--enable-cloog-backend=isl --disable-cloog-version-check
Thread model: posix
gcc version 4.8.0 (GCC)
-bash-3.2$ make
gcc -c main.c -O3 -ggdb -save-temps
gcc -c ConvertUTF.c -O3 -ggdb -save-temps
gcc -otest main.o ConvertUTF.o -O3 -ggdb -save-temps
-bash-3.2$ ./test
Clipboard data len 26214400
Segmentation Fault (core dumped)
The problem also occurs with gcc 8.3.0 on Solaris:
COLLECT_GCC=/export/home/kb161603/build_gcc/gcc/xgcc
Target: i386-pc-solaris2.10
Configured with: ../gcc-8.3.0/configure --with-mpc=/opt/tarantella
--with-gmp=/opt/tarantella --with-mpfr=/opt/tarantella : (reconfigured)
../gcc-8.3.0/configure --with-mpc=/opt/tarantella --with-gmp=/opt/tarantella
--with-mpfr=/opt/tarantella --enable-languages=c,c++
Thread model: posix
gcc version 8.3.0 (GCC)
The attachment gccbug.tar.gz contains the program source files, .i files and
Makefile:
-bash-3.2$ tar tvf gccbug.tar
-rw-r--r-- kb161603/other 9120 2019-03-12 15:59 ConvertUTF.c
-rw-r--r-- kb161603/other 6695 2019-03-07 11:29 ConvertUTF.h
-rw-r--r-- kb161603/other 5595 2019-03-13 13:59 ConvertUTF.i
-rw-r--r-- kb161603/other 6308 2019-03-13 13:59 ConvertUTF.o
-rw-r--r-- kb161603/other 26821 2019-03-13 13:59 ConvertUTF.s
-rw-r--r-- kb161603/other 1945 2019-03-12 16:14 main.c
-rw-r--r-- kb161603/other 38874 2019-03-13 13:59 main.i
-rw-r--r-- kb161603/other 10004 2019-03-13 13:59 main.o
-rw-r--r-- kb161603/other 37056 2019-03-13 13:59 main.s
-rw-r--r-- kb161603/other 268 2019-03-12 16:16 Makefile
-rwxr-xr-x kb161603/other 18936 2019-03-13 13:59 test
