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* [Bug sanitizer/66452] New: [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used @ 2015-06-07 20:13 dimhen at gmail dot com 2015-06-08 8:18 ` [Bug sanitizer/66452] " mpolacek at gcc dot gnu.org ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: dimhen at gmail dot com @ 2015-06-07 20:13 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66452 Bug ID: 66452 Summary: [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: sanitizer Assignee: unassigned at gcc dot gnu.org Reporter: dimhen at gmail dot com CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org, jakub at gcc dot gnu.org, kcc at gcc dot gnu.org Target Milestone: --- r224060 PASS r224193 FAIL $ g++ -Wall -O0 -fsanitize=undefined -c x.ii -fpreprocessed -o x.o x.ii: In member function 'A B::m_fn1() const': x.ii:9:12: warning: unused variable 'i' [-Wunused-variable] for (int i;;) ^ At global scope: cc1plus: warning: '*.Lubsan_data0' defined but not used [-Wunused-variable] $ cat x.ii class A { public: A(int); }; class B { A m_fn1() const; }; A B::m_fn1() const { for (int i;;) ; return 0; } $ g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: /home/dimhen/src/gcc_current/configure --prefix=/usr/local/gcc_current --enable-static --enable-checking=yes,df,fold,rtl --enable-languages=c,c++,lto --enable-plugin --disable-libstdcxx-dual-abi --disable-multilib Thread model: posix gcc version 6.0.0 20150606 (experimental) [trunk revision 224193] (GCC) $ ~/bin/gcc_224060_rls/bin/g++ -v Using built-in specs. COLLECT_GCC=/home/dimhen/bin/gcc_224060_rls/bin/g++ COLLECT_LTO_WRAPPER=/home/dimhen/bin/gcc_224060_rls/bin/../libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: /home/dimhen/src/gcc_r224060/configure --prefix=/usr/local/gcc_current --enable-static --enable-checking=release --enable-languages=c,c++,lto --enable-plugin --disable-libstdcxx-dual-abi --disable-multilib Thread model: posix gcc version 6.0.0 20150603 (experimental) [trunk revision 224060] (GCC) ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug sanitizer/66452] [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used 2015-06-07 20:13 [Bug sanitizer/66452] New: [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used dimhen at gmail dot com @ 2015-06-08 8:18 ` mpolacek at gcc dot gnu.org 2015-06-08 8:34 ` mpolacek at gcc dot gnu.org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: mpolacek at gcc dot gnu.org @ 2015-06-08 8:18 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66452 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2015-06-08 CC| |mpolacek at gcc dot gnu.org Target Milestone|--- |6.0 Ever confirmed|0 |1 --- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Confirmed. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug sanitizer/66452] [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used 2015-06-07 20:13 [Bug sanitizer/66452] New: [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used dimhen at gmail dot com 2015-06-08 8:18 ` [Bug sanitizer/66452] " mpolacek at gcc dot gnu.org @ 2015-06-08 8:34 ` mpolacek at gcc dot gnu.org 2015-06-08 8:36 ` dimhen at gmail dot com ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: mpolacek at gcc dot gnu.org @ 2015-06-08 8:34 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66452 --- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Started with r224161 aka debug-early branch merge. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug sanitizer/66452] [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used 2015-06-07 20:13 [Bug sanitizer/66452] New: [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used dimhen at gmail dot com 2015-06-08 8:18 ` [Bug sanitizer/66452] " mpolacek at gcc dot gnu.org 2015-06-08 8:34 ` mpolacek at gcc dot gnu.org @ 2015-06-08 8:36 ` dimhen at gmail dot com 2015-06-08 8:45 ` mpolacek at gcc dot gnu.org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: dimhen at gmail dot com @ 2015-06-08 8:36 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66452 --- Comment #3 from Dmitry G. Dyachenko <dimhen at gmail dot com> --- r224136 PASS r224161 FAIL (stage1 compiler due broken bootstrap) ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug sanitizer/66452] [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used 2015-06-07 20:13 [Bug sanitizer/66452] New: [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used dimhen at gmail dot com ` (2 preceding siblings ...) 2015-06-08 8:36 ` dimhen at gmail dot com @ 2015-06-08 8:45 ` mpolacek at gcc dot gnu.org 2015-06-08 10:36 ` mpolacek at gcc dot gnu.org 2015-06-08 10:36 ` mpolacek at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: mpolacek at gcc dot gnu.org @ 2015-06-08 8:45 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66452 --- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> --- I'm testing --- a/gcc/toplev.c +++ b/gcc/toplev.c @@ -534,6 +534,7 @@ check_global_declaration (tree decl) to handle multiple external decls in different scopes. */ && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl))) && ! DECL_EXTERNAL (decl) + && ! DECL_ARTIFICIAL (decl) && ! TREE_PUBLIC (decl) /* A volatile variable might be used in some non-obvious way. */ && ! TREE_THIS_VOLATILE (decl) (Maybe we should also test !TREE_NO_WARNING but the above is enough to fix this.) ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug sanitizer/66452] [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used 2015-06-07 20:13 [Bug sanitizer/66452] New: [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used dimhen at gmail dot com ` (3 preceding siblings ...) 2015-06-08 8:45 ` mpolacek at gcc dot gnu.org @ 2015-06-08 10:36 ` mpolacek at gcc dot gnu.org 2015-06-08 10:36 ` mpolacek at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: mpolacek at gcc dot gnu.org @ 2015-06-08 10:36 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66452 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Fixed. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug sanitizer/66452] [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used 2015-06-07 20:13 [Bug sanitizer/66452] New: [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used dimhen at gmail dot com ` (4 preceding siblings ...) 2015-06-08 10:36 ` mpolacek at gcc dot gnu.org @ 2015-06-08 10:36 ` mpolacek at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: mpolacek at gcc dot gnu.org @ 2015-06-08 10:36 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66452 --- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Author: mpolacek Date: Mon Jun 8 10:35:24 2015 New Revision: 224216 URL: https://gcc.gnu.org/viewcvs?rev=224216&root=gcc&view=rev Log: PR sanitizer/66452 * toplev.c (check_global_declaration): Don't warn about artificial decls. * g++.dg/ubsan/pr66452.C: New test. Added: trunk/gcc/testsuite/g++.dg/ubsan/pr66452.C Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/toplev.c ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2015-06-08 10:36 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2015-06-07 20:13 [Bug sanitizer/66452] New: [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used dimhen at gmail dot com 2015-06-08 8:18 ` [Bug sanitizer/66452] " mpolacek at gcc dot gnu.org 2015-06-08 8:34 ` mpolacek at gcc dot gnu.org 2015-06-08 8:36 ` dimhen at gmail dot com 2015-06-08 8:45 ` mpolacek at gcc dot gnu.org 2015-06-08 10:36 ` mpolacek at gcc dot gnu.org 2015-06-08 10:36 ` mpolacek at gcc dot gnu.org
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