* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast'
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
@ 2020-12-21 15:23 ` marxin at gcc dot gnu.org
2021-01-05 9:37 ` rguenth at gcc dot gnu.org
` (17 subsequent siblings)
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From: marxin at gcc dot gnu.org @ 2020-12-21 15:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2020-12-21
Ever confirmed|0 |1
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast'
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
2020-12-21 15:23 ` [Bug bootstrap/98414] " marxin at gcc dot gnu.org
@ 2021-01-05 9:37 ` rguenth at gcc dot gnu.org
2021-01-05 10:37 ` marxin at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2021-01-05 9:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |11.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Maybe -static-libstdc++ with -fsanitize=undefined has an ordering issue?
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast'
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
2020-12-21 15:23 ` [Bug bootstrap/98414] " marxin at gcc dot gnu.org
2021-01-05 9:37 ` rguenth at gcc dot gnu.org
@ 2021-01-05 10:37 ` marxin at gcc dot gnu.org
2021-01-05 12:40 ` [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a marxin at gcc dot gnu.org
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From: marxin at gcc dot gnu.org @ 2021-01-05 10:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Maybe -static-libstdc++ with -fsanitize=undefined has an ordering issue?
No, that does not help. I'm going to bisect that first..
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (2 preceding siblings ...)
2021-01-05 10:37 ` marxin at gcc dot gnu.org
@ 2021-01-05 12:40 ` marxin at gcc dot gnu.org
2021-01-05 13:44 ` nathan at gcc dot gnu.org
` (14 subsequent siblings)
18 siblings, 0 replies; 20+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-01-05 12:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[11 Regression] UBSAN |[11 Regression] UBSAN
|bootstrap is broken: |bootstrap is broken:
|ubsan/ubsan_type_hash_itani |ubsan/ubsan_type_hash_itani
|um.cpp:162: undefined |um.cpp:162: undefined
|reference to |reference to
|`__dynamic_cast' |`__dynamic_cast' since
| |r11-6083-gb7dfc2074c78415d4
| |51eb34d1608016c80b1c41a
Keywords|needs-bisection |
CC| |nathan at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
So it started when c++ module mapper was added:
r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (3 preceding siblings ...)
2021-01-05 12:40 ` [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a marxin at gcc dot gnu.org
@ 2021-01-05 13:44 ` nathan at gcc dot gnu.org
2021-01-05 13:51 ` jakub at gcc dot gnu.org
` (13 subsequent siblings)
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From: nathan at gcc dot gnu.org @ 2021-01-05 13:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
there isn't a dynamic cast in the mapper (or libcody)
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (4 preceding siblings ...)
2021-01-05 13:44 ` nathan at gcc dot gnu.org
@ 2021-01-05 13:51 ` jakub at gcc dot gnu.org
2021-01-05 14:08 ` marxin at gcc dot gnu.org
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From: jakub at gcc dot gnu.org @ 2021-01-05 13:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Likely it just is the first TU that needs -fsanitize=vptr sanitization...
Seems -lubsan comes after -lstdc++ when linking with -fsanitize=undefined
-static-libstdc++ -static-libubsan so if the vptr checking code needs to be
linked, it isn't satisfied.
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (5 preceding siblings ...)
2021-01-05 13:51 ` jakub at gcc dot gnu.org
@ 2021-01-05 14:08 ` marxin at gcc dot gnu.org
2021-01-05 14:10 ` marxin at gcc dot gnu.org
` (11 subsequent siblings)
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From: marxin at gcc dot gnu.org @ 2021-01-05 14:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
I replaced cp/mapper-client.o cp/mapper-resolver.o just with:
$ cat mapper-resolver.ii
namespace Cody {
enum class Flags : unsigned;
class Resolver {
virtual int IncludeTranslateRequest(int *s, Flags flags, int &include);
};
} // namespace Cody
class module_resolver : public Cody::Resolver {
virtual int IncludeTranslateRequest(int *s, Cody::Flags,
int &include) override;
private:
};
int module_resolver::IncludeTranslateRequest(int *s, Cody::Flags,
int &include) {}
which needs the symbol:
nm mapper-resolver.o
...
U _ZTVN10__cxxabiv120__si_class_type_infoE
Jakub: Does it confirm your description. Do you know how to fix that?
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (6 preceding siblings ...)
2021-01-05 14:08 ` marxin at gcc dot gnu.org
@ 2021-01-05 14:10 ` marxin at gcc dot gnu.org
2021-01-05 14:14 ` jakub at gcc dot gnu.org
` (10 subsequent siblings)
18 siblings, 0 replies; 20+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-01-05 14:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
All right, the linker command line is:
/home/marxin/Programming/testcases//objdir/./prev-gcc/collect2 -plugin
/home/marxin/Programming/testcases//objdir/./prev-gcc/liblto_plugin.so
-plugin-opt=/home/marxin/Programming/testcases//objdir/./prev-gcc/lto-wrapper
-plugin-opt=-fresolution=cc1plus.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_eh -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_eh
--eh-frame-hdr -m elf_x86_64 -export-dynamic -dynamic-linker
/lib64/ld-linux-x86-64.so.2 -o cc1plus /usr/lib/../lib64/crt1.o
/usr/lib/../lib64/crti.o
/home/marxin/Programming/testcases//objdir/./prev-gcc/crtbegin.o
-L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-L./../zlib -L/home/marxin/Programming/testcases//objdir/./prev-gcc
-L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libsanitizer
-L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libsanitizer/ubsan
-L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libsanitizer/ubsan/.libs
-L/lib/../lib64 -L/usr/lib/../lib64 cp/cp-lang.o c-family/stub-objc.o cp/call.o
cp/class.o cp/constexpr.o cp/constraint.o cp/coroutines.o cp/cp-gimplify.o
cp/cp-objcp-common.o cp/cp-ubsan.o cp/cvt.o cp/cxx-pretty-print.o cp/decl.o
cp/decl2.o cp/dump.o cp/error.o cp/except.o cp/expr.o cp/friend.o cp/init.o
cp/lambda.o cp/lex.o cp/logic.o cp/mangle.o mapper-resolver.o cp/method.o
cp/module.o cp/name-lookup.o cp/optimize.o cp/parser.o cp/pt.o cp/ptree.o
cp/rtti.o cp/search.o cp/semantics.o cp/tree.o cp/typeck.o cp/typeck2.o
cp/vtable-class-hierarchy.o attribs.o incpath.o c-family/c-common.o
c-family/c-cppbuiltin.o c-family/c-dump.o c-family/c-format.o
c-family/c-gimplify.o c-family/c-indentation.o c-family/c-lex.o
c-family/c-omp.o c-family/c-opts.o c-family/c-pch.o c-family/c-ppoutput.o
c-family/c-pragma.o c-family/c-pretty-print.o c-family/c-semantics.o
c-family/c-ada-spec.o c-family/c-ubsan.o c-family/known-headers.o
c-family/c-attribs.o c-family/c-warn.o c-family/c-spellcheck.o i386-c.o
glibc-c.o cc1plus-checksum.o libbackend.a main.o libcommon-target.a libcommon.a
../libcpp/libcpp.a ../libcody/libcody.a ../libdecnumber/libdecnumber.a
libcommon.a ../libcpp/libcpp.a ../libbacktrace/.libs/libbacktrace.a
../libiberty/libiberty.a ../libdecnumber/libdecnumber.a -lmpc -lmpfr -lgmp -lz
-Bstatic -lstdc++ -Bdynamic -lm -Bstatic -lubsan -Bdynamic -ldl -lrt -lpthread
-lm -lgcc -lgcc_eh -lc -lgcc -lgcc_eh
/home/marxin/Programming/testcases//objdir/./prev-gcc/crtend.o
/usr/lib/../lib64/crtn.o
when I replace -Bstatic -lstdc++ .. -Bstatic -lubsan with:
-Bstatic -lubsan -Bstatic -lstdc++
it works.
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (7 preceding siblings ...)
2021-01-05 14:10 ` marxin at gcc dot gnu.org
@ 2021-01-05 14:14 ` jakub at gcc dot gnu.org
2021-01-05 14:24 ` marxin at gcc dot gnu.org
` (9 subsequent siblings)
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From: jakub at gcc dot gnu.org @ 2021-01-05 14:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I don't. LIBUBSAN_SPEC comes from gcc.c, while the libstdc++ stuff comes from
cp/g++spec.c and the ordering between the two is hard to achieve, plus it is
unclear if we shouldn't for -static-libubsan instead just add another -lstdc++
copy (but one honoring -static-libstdc++).
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (8 preceding siblings ...)
2021-01-05 14:14 ` jakub at gcc dot gnu.org
@ 2021-01-05 14:24 ` marxin at gcc dot gnu.org
2021-01-07 13:32 ` marxin at gcc dot gnu.org
` (8 subsequent siblings)
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From: marxin at gcc dot gnu.org @ 2021-01-05 14:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #8)
> I don't. LIBUBSAN_SPEC comes from gcc.c, while the libstdc++ stuff comes
> from cp/g++spec.c and the ordering between the two is hard to achieve, plus
> it is unclear if we shouldn't for -static-libubsan instead just add another
> -lstdc++ copy (but one honoring -static-libstdc++).
Hm, and what about something like that:
diff --git a/config/bootstrap-ubsan.mk b/config/bootstrap-ubsan.mk
index 1d85fe1c836..b2a474ae158 100644
--- a/config/bootstrap-ubsan.mk
+++ b/config/bootstrap-ubsan.mk
@@ -2,7 +2,7 @@
STAGE2_CFLAGS += -fsanitize=undefined -DUBSAN_BOOTSTRAP
STAGE3_CFLAGS += -fsanitize=undefined -DUBSAN_BOOTSTRAP
-POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan -DUBSAN_BOOTSTRAP
\
+POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan -lstdc++
-DUBSAN_BOOTSTRAP \
-B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ \
-B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ubsan/ \
-B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ubsan/.libs
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (9 preceding siblings ...)
2021-01-05 14:24 ` marxin at gcc dot gnu.org
@ 2021-01-07 13:32 ` marxin at gcc dot gnu.org
2021-01-11 9:54 ` marxin at gcc dot gnu.org
` (7 subsequent siblings)
18 siblings, 0 replies; 20+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-01-07 13:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #9)
> (In reply to Jakub Jelinek from comment #8)
> > I don't. LIBUBSAN_SPEC comes from gcc.c, while the libstdc++ stuff comes
> > from cp/g++spec.c and the ordering between the two is hard to achieve, plus
> > it is unclear if we shouldn't for -static-libubsan instead just add another
> > -lstdc++ copy (but one honoring -static-libstdc++).
>
> Hm, and what about something like that:
>
> diff --git a/config/bootstrap-ubsan.mk b/config/bootstrap-ubsan.mk
> index 1d85fe1c836..b2a474ae158 100644
> --- a/config/bootstrap-ubsan.mk
> +++ b/config/bootstrap-ubsan.mk
> @@ -2,7 +2,7 @@
>
> STAGE2_CFLAGS += -fsanitize=undefined -DUBSAN_BOOTSTRAP
> STAGE3_CFLAGS += -fsanitize=undefined -DUBSAN_BOOTSTRAP
> -POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan
> -DUBSAN_BOOTSTRAP \
> +POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan -lstdc++
> -DUBSAN_BOOTSTRAP \
> -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ \
> -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ubsan/ \
> -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ubsan/.libs
That's not going to work:
./xgcc -B./ -B/usr/local/x86_64-pc-linux-gnu/bin/ -isystem
/usr/local/x86_64-pc-linux-gnu/include -isystem
/usr/local/x86_64-pc-linux-gnu/sys-include
-L/home/mliska/Programming/gcc/objdir/gcc/../ld -xc++ -nostdinc /dev/null -S -o
/dev/null -fself-test=../../gcc/testsuite/selftests
./cc1./cc1plus: : /usr/lib64/libstdc++.so.6/usr/lib64/libstdc++.so.6: : version
`GLIBCXX_3.4.29' not found (required by ./cc1)version `GLIBCXX_3.4.29' not
found (required by ./cc1plus)
leaving to Nathan.
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (10 preceding siblings ...)
2021-01-07 13:32 ` marxin at gcc dot gnu.org
@ 2021-01-11 9:54 ` marxin at gcc dot gnu.org
2021-01-11 9:59 ` marxin at gcc dot gnu.org
` (6 subsequent siblings)
18 siblings, 0 replies; 20+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-01-11 9:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
There's a self-container test-case:
$ cat resolver.ii
class Resolver {
int GetCMIName();
virtual char GetCMISuffix() { return 'c'; }
};
int Resolver::GetCMIName() { GetCMISuffix(); return 0; }
int main() {}
$ -static-libstdc++ -static-libgcc -fsanitize=undefined -static-libubsan
[fine]
$ g++ -fsanitize=undefined resolver.ii -static-libstdc++ -static-libubsan
/usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld:
/usr/lib64/gcc/x86_64-suse-linux/10/libubsan.a(ubsan_type_hash_itanium.o): in
function `findBaseAtOffset(__cxxabiv1::__class_type_info const*, long)':
/home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:161:
undefined reference to `__dynamic_cast'
/usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld:
/home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:165:
undefined reference to `typeinfo for __cxxabiv1::__vmi_class_type_info'
/usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld:
/home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:165:
undefined reference to `__dynamic_cast'
/usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld:
/usr/lib64/gcc/x86_64-suse-linux/10/libubsan.a(ubsan_type_hash_itanium.o): in
function `isDerivedFromAtOffset(__cxxabiv1::__class_type_info const*,
__cxxabiv1::__class_type_info const*, long)':
/home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:124:
undefined reference to `__dynamic_cast'
/usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld:
/home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:128:
undefined reference to `typeinfo for __cxxabiv1::__vmi_class_type_info'
/usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld:
/home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:128:
undefined reference to `__dynamic_cast'
/usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld:
/usr/lib64/gcc/x86_64-suse-linux/10/libubsan.a(ubsan_type_hash_itanium.o): in
function `__ubsan::checkDynamicType(void*, void*, unsigned long)':
/home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:231:
undefined reference to `__dynamic_cast'
collect2: error: ld returned 1 exit status
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (11 preceding siblings ...)
2021-01-11 9:54 ` marxin at gcc dot gnu.org
@ 2021-01-11 9:59 ` marxin at gcc dot gnu.org
2021-01-11 10:02 ` jakub at gcc dot gnu.org
` (5 subsequent siblings)
18 siblings, 0 replies; 20+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-01-11 9:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got it!
It can be fixed with -fno-rtti and apparently libcody's objects do miss that :)
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (12 preceding siblings ...)
2021-01-11 9:59 ` marxin at gcc dot gnu.org
@ 2021-01-11 10:02 ` jakub at gcc dot gnu.org
2021-01-11 10:06 ` marxin at gcc dot gnu.org
` (4 subsequent siblings)
18 siblings, 0 replies; 20+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-01-11 10:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, that is a fix for the bootstrap-ubsan issues, but not the above small
testcase showing the problems for users.
But sure, as this is a problem that exists many years and nobody reported it
before, it is enough to fix just the bootstrap-ubsan stuff for GCC 11.
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (13 preceding siblings ...)
2021-01-11 10:02 ` jakub at gcc dot gnu.org
@ 2021-01-11 10:06 ` marxin at gcc dot gnu.org
2021-01-11 10:22 ` marxin at gcc dot gnu.org
` (3 subsequent siblings)
18 siblings, 0 replies; 20+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-01-11 10:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #14 from Martin Liška <marxin at gcc dot gnu.org> ---
When building GCC w/o bootstrap I see that libcody properly sets -fno-rtti:
g++ -std=c++11 -g -O2 -fno-enforce-eh-specs -fno-stack-protector
-fno-threadsafe-statics -fno-exceptions -fno-rtti
-fdebug-prefix-map=/home/marxin/Programming/gcc/libcody/= -W -Wall -include
config.h -I/home/marxin/Programming/gcc/libcody \
-MMD -MP -MF packet.d -c -o packet.o
/home/marxin/Programming/gcc/libcody/packet.cc
But it's not true for --with-build-config=bootstrap-ubsan in stage2:
/home/mliska/Programming/gcc/objdir/./prev-gcc/xg++
-B/home/mliska/Programming/gcc/objdir/./prev-gcc/
-B/usr/local/x86_64-pc-linux-gnu/bin/ -nostdinc++
-B/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
-I/home/mliska/Programming/gcc/libstdc++-v3/libsupc++
-L/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-g -O2 -fno-checking -fsanitize=undefined -DUBSAN_BOOTSTRAP -include config.h
-I../../libcody
-I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
-I/home/mliska/Programming/gcc/libstdc++-v3/libsupc++ \
-MMD -MP -MF packet.d -c -o packet.o ../../libcody/packet.cc
while other gcc/*.o objects have -fno-rtti:
/home/mliska/Programming/gcc/objdir/./prev-gcc/xg++
-B/home/mliska/Programming/gcc/objdir/./prev-gcc/
-B/usr/local/x86_64-pc-linux-gnu/bin/ -nostdinc++
-B/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
-I/home/mliska/Programming/gcc/libstdc++-v3/libsupc++
-L/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-fno-PIE -c -g -O2 -fno-checking -fsanitize=undefined -DUBSAN_BOOTSTRAP
-DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag
-Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings -fno-common -DHAVE_CONFIG_H -I.
-I. -I../../gcc -I../../gcc/. -I../../gcc/../include
-I../../gcc/../libcpp/include -I../../gcc/../libcody
-I../../gcc/../libdecnumber -I../../gcc/../libdecnumber/bid -I../libdecnumber
-I../../gcc/../libbacktrace -o ipa-icf.o -MT ipa-icf.o -MMD -MP -MF
./.deps/ipa-icf.TPo ../../gcc/ipa-icf.c
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (14 preceding siblings ...)
2021-01-11 10:06 ` marxin at gcc dot gnu.org
@ 2021-01-11 10:22 ` marxin at gcc dot gnu.org
2021-01-11 10:48 ` marxin at gcc dot gnu.org
` (2 subsequent siblings)
18 siblings, 0 replies; 20+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-01-11 10:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Status|NEW |ASSIGNED
--- Comment #15 from Martin Liška <marxin at gcc dot gnu.org> ---
I have a fix :)
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (15 preceding siblings ...)
2021-01-11 10:22 ` marxin at gcc dot gnu.org
@ 2021-01-11 10:48 ` marxin at gcc dot gnu.org
2021-01-11 12:55 ` nathan at gcc dot gnu.org
2021-01-12 18:33 ` nathan at gcc dot gnu.org
18 siblings, 0 replies; 20+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-01-11 10:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|marxin at gcc dot gnu.org |nathan at gcc dot gnu.org
--- Comment #16 from Martin Liška <marxin at gcc dot gnu.org> ---
Based on Jakub's review, leading that to Nathan.
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (16 preceding siblings ...)
2021-01-11 10:48 ` marxin at gcc dot gnu.org
@ 2021-01-11 12:55 ` nathan at gcc dot gnu.org
2021-01-12 18:33 ` nathan at gcc dot gnu.org
18 siblings, 0 replies; 20+ messages in thread
From: nathan at gcc dot gnu.org @ 2021-01-11 12:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #17 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
libcody should be being built with -fno-exceptions -fno-rtti, that it isn;t
suggests I'm configuring it wrong.
^ permalink raw reply [flat|nested] 20+ messages in thread* [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
` (17 preceding siblings ...)
2021-01-11 12:55 ` nathan at gcc dot gnu.org
@ 2021-01-12 18:33 ` nathan at gcc dot gnu.org
18 siblings, 0 replies; 20+ messages in thread
From: nathan at gcc dot gnu.org @ 2021-01-12 18:33 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #18 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed e2aa8a5f982 2021-01-11 | libcody: Simplify configure [PR 98414, 98509]
^ permalink raw reply [flat|nested] 20+ messages in thread