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Bug#506713: g++-4.3: Incorrect code in SPARC shared libraries
Package: g++-4.3
Version: 4.3.2-1
Severity: serious
Functions compiled for SPARC with both -O2 and -fPIC options, which
return structures and require global data, may have incorrect code
generated for them.
The following example is based on Qt 3, which is affected by this bug
(see #490999). The code should of course print 1 + 1 = 2 but when
compiled for SPARC with -O2 -fPIC it prints 1 + 1 = 0 (or may crash).
The first two instructions generated for QTime::addMSecs() are a save
using %sp and a load relative to %sp which depends on the *old* value of
%sp.
This example appears to be compiled correctly if I remove either option
or reduce the value of MSECS_PER_DAY such that it can be an immediate
constant.
Ben.
#include iostream
class QTime
{
public:
explicit QTime(int ms = 0) : ds(ms) {}
static QTime currentTime() { return QTime(); }
QTime addMSecs(int ms) const;
int msecs() const { return ds; }
private:
unsigned ds;
};
static const unsigned MSECS_PER_DAY = 8640;
QTime QTime::addMSecs( int ms ) const
{
QTime t;
if ( ms 0 ) {
// % not well-defined for -ve, but / is.
int negdays = (MSECS_PER_DAY-ms) / MSECS_PER_DAY;
t.ds = ((int)ds + ms + negdays*MSECS_PER_DAY)
% MSECS_PER_DAY;
} else {
t.ds = ((int)ds + ms) % MSECS_PER_DAY;
}
return t;
}
int main(int argc, char* argv[] )
{
std::cout 1 + 1 = QTime(1).addMSecs(1).msecs() std::endl;
}
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Bug#506713: g++-4.3: Incorrect code in SPARC shared libraries
Ben Hutchings schrieb: Functions compiled for SPARC with both -O2 and -fPIC options, which return structures and require global data, may have incorrect code generated for them. please could you recheck with gcc-4.3 from experimental, and gcc-snapshot? Matthias -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Bug#506713: g++-4.3: Incorrect code in SPARC shared libraries
On Mon, 2008-11-24 at 01:11 +0100, Matthias Klose wrote: Ben Hutchings schrieb: Functions compiled for SPARC with both -O2 and -fPIC options, which return structures and require global data, may have incorrect code generated for them. please could you recheck with gcc-4.3 from experimental, and gcc-snapshot? Not easily. I used sperger to investigate this and don't have my own SPARC system set up. Ben. signature.asc Description: This is a digitally signed message part
Results for 4.3.3 20081117 (prerelease) (Debian 4.3.2-3~exp1) libjava testsuite on s390-ibm-linux-gnu
LAST_UPDATED: Mon Nov 17 20:41:17 UTC 2008 (revision 141948) Target: s390-linux-gnu gcc version 4.3.3 20081117 (prerelease) (Debian 4.3.2-3~exp1) Native configuration is s390-ibm-linux-gnu === libjava tests === Running target unix === libjava Summary for unix === # of expected passes2574 Running target unix/-fstack-protector === libjava Summary for unix/-fstack-protector === # of expected passes2574 === libjava Summary === # of expected passes5148 Compiler version: 4.3.3 20081117 (prerelease) (Debian 4.3.2-3~exp1) libjava Platform: s390-ibm-linux-gnu configure flags: -v --with-pkgversion='Debian 4.3.2-3~exp1' --with-bugurl=file:///usr/share/doc/gcj-4.3/README.Bugs --enable-languages=c,c++,java --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3 --program-suffix=-4.3 --enable-clocale=gnu --enable-java-awt=gtk --enable-gtk-cairo --enable-plugin --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.3-1.5.0.0/jre --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libmudflap --with-long-double-128 --enable-checking=release --build=s390-linux-gnu --host=s390-linux-gnu --target=s390-linux-gnu BOOT_CFLAGS= Build Dependencies: Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad) ||/ Name Version Description +++-=--== ii binutils 2.18.1~cvs20080103-7 The GNU assembler, linker and binary utilities ii libc6 2.7-16 GNU C Library: Shared libraries Patches that Debian applied in this version: svn-updates: updates from the 4.3 branch upto 20081117. parallel-check: Parallelize the testsuite pr30740: PR ada/30740: Do not optimize X*(2**Y) in a modular context gcc-textdomain: Set gettext's domain and textdomain to the versioned package name. gcc-driver-extra-langs: Add options and specs for languages that are not built from a source (but built from separate sources). gcc-hash-style-both: Link using --hash-style=both (alpha, amd64, ia64, i386, powerpc, ppc64, s390, sparc) libstdc++-pic: Build and install libstdc++_pic.a library. libstdc++-doclink: adjust hrefs to point to the local documentation libobjc-gc-link: Link libobjc_gc with libgcjgc_convenience.la and needed thread flags and libraries. libjava-stacktrace: libgcj: Lookup source file name and line number in separated debug files found in /usr/lib/debug libjava-subdir: - Set the libjava sublibdir to /usr/lib/gcj-4.3 - Set the default libgcj database dir to /var/lib/gcj-4.3 libjava-jnipath: - Add /usr/lib/jni to java.library.path. - When running the i386 binaries on amd64, look in - /usr/lib32/gcj-x.y and /usr/lib32/jni instead. libjava-sjlj: Don't try to use _Unwind_Backtrace on SJLJ targets. See bug #387875, #388505, GCC PR 29206. libjava-rpath: - Link ecjx with -rpath \$(dbexecdir) libjava-file-support: libjava: @file support for gjavah gjar libjava-soname: Bump the libgcj soversion. libjava-xulrunner1.9: Add configure check for xulrunner-1.9. libjava-realloc-leak: Don't leak upon failed realloc (taken from the trunk). libgcj-bc: libgcj_bc pr28102: Apply proposed fix for PR target/28102. alpha-no-ev4-directive: boehm-gc-getnprocs: boehm-gc/pthread_support.c (GC_get_nprocs): Use sysconf as fallback. note-gnu-stack: Add .note.GNU-stack sections for gcc's crt files, libffi and boehm-gc Taken from FC. libjava-armel-ldflags: Adjust libjava extra_ldflags for armel. libstdc++-symbols-hppa: Update libstdc++ baseline symbols for hppa. pr10768: PR ada/10768: ICEs on compilation of ada support library for avr pr15808: PR ada/15808: Illegal program not detected, RM 3.9.3(10) pr15915: PR ada/15915: Illegal program not detected, RM 13.11(15) pr16086: PR ada/16086: Legal program rejected, procedure of protected object should be visible pr16087: PR ada/16087: Accept statically matching constraint in full view pr16098: PR ada/16098: Illegal program not detected, RM 13.1(6) pr17985: PR ada/17985: GNAT accepts extension aggregate where expected type is not extension pr18680: PR ada/18680: pragma Linker_Section problems pr22255: PR ada/22255: Reset on shared file causes Use_Error. pr22387: PR ada/22387: Ada compiler crash when inheriting from a record with custom layout pr24170: Fix PR libgcj/24170. pr28305: PR ada/28305: GNAT bug when inlining instance of a generic subprogram pr28322: Fix PR other/28322, GCC new warnings and compatibility.
Results for 4.4.0 20081117 (experimental) [trunk revision 141948] (Debian 20081117-1) testsuite on arm-unknown-linux-gnueabi
LAST_UPDATED: Mon Nov 17 20:25:34 UTC 2008 (revision 141948) Native configuration is arm-unknown-linux-gnueabi === libffi tests === Running target unix === libffi Summary === # of expected passes1389 # of unsupported tests 10 === libgomp tests === Running target unix FAIL: libgomp.fortran/reduction3.f90 -O0 execution test FAIL: libgomp.fortran/reduction3.f90 -O1 execution test FAIL: libgomp.fortran/reduction3.f90 -O2 execution test FAIL: libgomp.fortran/reduction3.f90 -O3 -fomit-frame-pointer execution test FAIL: libgomp.fortran/reduction3.f90 -O3 -fomit-frame-pointer -funroll-loops execution test FAIL: libgomp.fortran/reduction3.f90 -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions execution test FAIL: libgomp.fortran/reduction3.f90 -O3 -g execution test FAIL: libgomp.fortran/reduction3.f90 -Os execution test WARNING: program timed out. FAIL: libgomp.fortran/strassen.f90 -O execution test === libgomp Summary === # of expected passes2266 # of unexpected failures9 # of unsupported tests 7 === libjava tests === Running target unix FAIL: Throw_2 execution - source compiled test FAIL: Throw_2 -findirect-dispatch execution - source compiled test FAIL: Throw_2 -O3 execution - source compiled test FAIL: Throw_2 -O3 -findirect-dispatch execution - source compiled test === libjava Summary === # of expected passes2566 # of unexpected failures4 # of untested testcases 4 === libmudflap tests === Running target unix FAIL: libmudflap.c++/pass41-frag.cxx execution test FAIL: libmudflap.c++/pass41-frag.cxx (-static) execution test FAIL: libmudflap.c++/pass41-frag.cxx (-O2) execution test FAIL: libmudflap.c++/pass41-frag.cxx (-O3) execution test === libmudflap Summary === # of expected passes1890 # of unexpected failures4 === libstdc++ tests === Running target unix XPASS: 26_numerics/headers/cmath/c99_classification_macros_c.cc (test for excess errors) WARNING: program timed out. FAIL: ext/pb_ds/regression/hash_data_map_rand.cc (test for excess errors) UNRESOLVED: ext/pb_ds/regression/hash_data_map_rand.cc compilation failed to produce executable WARNING: program timed out. FAIL: ext/pb_ds/regression/hash_no_data_map_rand.cc (test for excess errors) UNRESOLVED: ext/pb_ds/regression/hash_no_data_map_rand.cc compilation failed to produce executable WARNING: program timed out. FAIL: ext/pb_ds/regression/priority_queue_rand.cc (test for excess errors) UNRESOLVED: ext/pb_ds/regression/priority_queue_rand.cc compilation failed to produce executable WARNING: program timed out. FAIL: ext/pb_ds/regression/tree_data_map_rand.cc (test for excess errors) UNRESOLVED: ext/pb_ds/regression/tree_data_map_rand.cc compilation failed to produce executable WARNING: program timed out. FAIL: ext/pb_ds/regression/tree_no_data_map_rand.cc (test for excess errors) UNRESOLVED: ext/pb_ds/regression/tree_no_data_map_rand.cc compilation failed to produce executable WARNING: program timed out. FAIL: ext/pb_ds/regression/trie_data_map_rand.cc (test for excess errors) UNRESOLVED: ext/pb_ds/regression/trie_data_map_rand.cc compilation failed to produce executable WARNING: program timed out. FAIL: ext/pb_ds/regression/trie_no_data_map_rand.cc (test for excess errors) UNRESOLVED: ext/pb_ds/regression/trie_no_data_map_rand.cc compilation failed to produce executable === libstdc++ Summary === # of expected passes5685 # of unexpected failures7 # of unexpected successes 1 # of expected failures 74 # of unresolved testcases 7 # of unsupported tests 338 Target: arm-linux-gnueabi gcc version 4.4.0 20081117 (experimental) [trunk revision 141948] (Debian 20081117-1) === g++ tests === Running target unix FAIL: g++.dg/ipa/iinline-1.C scan-ipa-dump inline String::funcOne[^\\n]*inline copy in int main XPASS: g++.dg/other/packed1.C execution test FAIL: g++.dg/template/cond5.C (internal compiler error) FAIL: g++.dg/template/cond5.C (test for excess errors) FAIL: g++.dg/tree-ssa/new1.C scan-tree-dump-not forwprop1 = .* \\+ - FAIL: g++.old-deja/g++.law/profile1.C (test for excess errors) UNRESOLVED: g++.old-deja/g++.law/profile1.C compilation failed to produce executable === g++ Summary === # of expected passes18610 # of unexpected failures5 # of unexpected successes 1 # of expected failures 135 # of unresolved testcases 1 # of unsupported tests 145 /build/buildd/gcc-snapshot-20081117/build/gcc/testsuite/g++/../../g++ version 4.4.0 20081117 (experimental) [trunk revision 141948] (Debian 20081117-1) === gcc tests === Running target unix WARNING: program timed out. FAIL:
