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* [Bug libstdc++/96345] New: __cxa demangle fails to demangle a very long string @ 2020-07-27 19:55 hededrk at gmail dot com 2020-07-27 19:57 ` [Bug libstdc++/96345] " hededrk at gmail dot com ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: hededrk at gmail dot com @ 2020-07-27 19:55 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96345 Bug ID: 96345 Summary: __cxa demangle fails to demangle a very long string Product: gcc Version: 10.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: hededrk at gmail dot com Target Milestone: --- I found this bug because one of my tests started to fail (not sure when it started to fail because I've set up CI only yesterday). I assume this is a bug because GCC is able to produce such names. Steps to reproduce: 1. compile attached file g++ -c cxa_demangle_fail.cpp 2. obtain mangled name with nm nm cxa_demangle_fail.o 3. pass that name into abi::__cxa_demangle auto name = /*long string*/; size_t size = 1024; auto memory = static_cast<char*>(malloc(size)); int status; auto demangled = abi::__cxa_demangle(name, memory, &size, &status); Result: __cxa_demangle fails with code -2. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/96345] __cxa demangle fails to demangle a very long string 2020-07-27 19:55 [Bug libstdc++/96345] New: __cxa demangle fails to demangle a very long string hededrk at gmail dot com @ 2020-07-27 19:57 ` hededrk at gmail dot com 2020-07-27 19:58 ` hededrk at gmail dot com ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: hededrk at gmail dot com @ 2020-07-27 19:57 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96345 --- Comment #1 from V <hededrk at gmail dot com> --- Created attachment 48936 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48936&action=edit failing example ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/96345] __cxa demangle fails to demangle a very long string 2020-07-27 19:55 [Bug libstdc++/96345] New: __cxa demangle fails to demangle a very long string hededrk at gmail dot com 2020-07-27 19:57 ` [Bug libstdc++/96345] " hededrk at gmail dot com @ 2020-07-27 19:58 ` hededrk at gmail dot com 2020-07-27 21:18 ` pinskia at gcc dot gnu.org ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: hededrk at gmail dot com @ 2020-07-27 19:58 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96345 --- Comment #2 from V <hededrk at gmail dot com> --- Created attachment 48937 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48937&action=edit function with name that __cxa_demangle rejects ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/96345] __cxa demangle fails to demangle a very long string 2020-07-27 19:55 [Bug libstdc++/96345] New: __cxa demangle fails to demangle a very long string hededrk at gmail dot com 2020-07-27 19:57 ` [Bug libstdc++/96345] " hededrk at gmail dot com 2020-07-27 19:58 ` hededrk at gmail dot com @ 2020-07-27 21:18 ` pinskia at gcc dot gnu.org 2020-07-28 4:49 ` hededrk at gmail dot com ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu.org @ 2020-07-27 21:18 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96345 --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Does c++filt demangle it? ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/96345] __cxa demangle fails to demangle a very long string 2020-07-27 19:55 [Bug libstdc++/96345] New: __cxa demangle fails to demangle a very long string hededrk at gmail dot com ` (2 preceding siblings ...) 2020-07-27 21:18 ` pinskia at gcc dot gnu.org @ 2020-07-28 4:49 ` hededrk at gmail dot com 2020-07-28 8:50 ` hededrk at gmail dot com 2022-05-30 9:39 ` [Bug demangler/96345] " hededrk at gmail dot com 5 siblings, 0 replies; 7+ messages in thread From: hededrk at gmail dot com @ 2020-07-28 4:49 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96345 --- Comment #4 from V <hededrk at gmail dot com> --- No, c++filt also does not demangle it. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/96345] __cxa demangle fails to demangle a very long string 2020-07-27 19:55 [Bug libstdc++/96345] New: __cxa demangle fails to demangle a very long string hededrk at gmail dot com ` (3 preceding siblings ...) 2020-07-28 4:49 ` hededrk at gmail dot com @ 2020-07-28 8:50 ` hededrk at gmail dot com 2022-05-30 9:39 ` [Bug demangler/96345] " hededrk at gmail dot com 5 siblings, 0 replies; 7+ messages in thread From: hededrk at gmail dot com @ 2020-07-28 8:50 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96345 --- Comment #5 from V <hededrk at gmail dot com> --- (In reply to Andrew Pinski from comment #3) > Does c++filt demangle it? I've fed output of nm into c++filt and this function came out mangled, while others were demangled. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug demangler/96345] __cxa demangle fails to demangle a very long string 2020-07-27 19:55 [Bug libstdc++/96345] New: __cxa demangle fails to demangle a very long string hededrk at gmail dot com ` (4 preceding siblings ...) 2020-07-28 8:50 ` hededrk at gmail dot com @ 2022-05-30 9:39 ` hededrk at gmail dot com 5 siblings, 0 replies; 7+ messages in thread From: hededrk at gmail dot com @ 2022-05-30 9:39 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96345 V <hededrk at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Version|10.1.0 |12.1.1 Host| |x86_64 Target| |x86_64 --- Comment #6 from V <hededrk at gmail dot com> --- Still fails as of GCC 12.1. I've shortened the input string, it fails with names longer than 999 characters. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-05-30 9:39 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-07-27 19:55 [Bug libstdc++/96345] New: __cxa demangle fails to demangle a very long string hededrk at gmail dot com 2020-07-27 19:57 ` [Bug libstdc++/96345] " hededrk at gmail dot com 2020-07-27 19:58 ` hededrk at gmail dot com 2020-07-27 21:18 ` pinskia at gcc dot gnu.org 2020-07-28 4:49 ` hededrk at gmail dot com 2020-07-28 8:50 ` hededrk at gmail dot com 2022-05-30 9:39 ` [Bug demangler/96345] " hededrk at gmail dot com
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