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* [Bug c++/110229] New: Segment fault on git clone @ 2023-06-12 17:44 larry9 at ffdlr dot com 2023-06-12 17:47 ` [Bug c++/110229] Segment fault with initializer an array (unrolled) in a function pinskia at gcc dot gnu.org ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: larry9 at ffdlr dot com @ 2023-06-12 17:44 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110229 Bug ID: 110229 Summary: Segment fault on git clone Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: larry9 at ffdlr dot com Target Milestone: --- Created attachment 55312 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55312&action=edit Where gdb was at the segfault The file is initializing a very large vector. An array doesn't cause the segment fault. It needs to be compiled -O1 too, -O0 doesn't segfault. The file needs some 12GiB to compile and took 5 hours with the debug cc1plus to get to the fault. It also takes more or less entries between my machines and versions. I found this with v11.3 under Ubuntu 22.04 but I did a git clone and compiled with -O0 -ggdb to get the trace starting like /net/larry/bin64/g++-git-dbg/libexec/gcc/x86_64-linux-gnu/14.0.0/cc1plus -quiet -imultiarch x86_64-linux-gnu -D_GNU_SOURCE bug.sh.cpp -quiet -dumpbase bug.sh.cpp -dumpbase-ext .cpp -mtune=generic -march=x86-64 -O1 -o /tmp/bug.sh.s #0 0x0000000000c45f4c in gt_ggc_mx_lang_tree_node (x_p=0x7ffcef0f18a0) at ./gt-cp-tree.h:104 #1 0x0000000000c466fd in gt_ggc_mx_lang_tree_node (x_p=<optimized out>) at ./gt-cp-tree.h:494 #2 0x0000000000c466fd in gt_ggc_mx_lang_tree_node (x_p=<optimized out>) at ./gt-cp-tree.h:494 #3 0x0000000000c466fd in gt_ggc_mx_lang_tree_node (x_p=<optimized out>) at ./gt-cp-tree.h:494 I have included the gdb output as an attachment The code is too large to be an attachment. It could easily be generated by a script, but I don't know the rules on that one. typedef unsigned long long int size_t; class psuedo_vector { public: ~psuedo_vector() { delete[] data_; } psuedo_vector(size_t sz) { data_ = new int[sz]; } int& operator[] (size_t index) { return data_[index]; } private: int* data_; }; psuedo_vector V(2673938); void init_v() { V[19]=19; V[20]=20; ... V[2589823]=2589823; V[2589824]=2589824; } ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/110229] Segment fault with initializer an array (unrolled) in a function 2023-06-12 17:44 [Bug c++/110229] New: Segment fault on git clone larry9 at ffdlr dot com @ 2023-06-12 17:47 ` pinskia at gcc dot gnu.org 2023-06-12 17:54 ` larry9 at ffdlr dot com ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-06-12 17:47 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110229 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- >It could easily be generated by a script, but I don't know the rules on that one. Attaching the script is ok for this case. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/110229] Segment fault with initializer an array (unrolled) in a function 2023-06-12 17:44 [Bug c++/110229] New: Segment fault on git clone larry9 at ffdlr dot com 2023-06-12 17:47 ` [Bug c++/110229] Segment fault with initializer an array (unrolled) in a function pinskia at gcc dot gnu.org @ 2023-06-12 17:54 ` larry9 at ffdlr dot com 2023-06-12 18:02 ` [Bug middle-end/110229] " pinskia at gcc dot gnu.org 2023-06-12 18:11 ` larry9 at ffdlr dot com 3 siblings, 0 replies; 5+ messages in thread From: larry9 at ffdlr dot com @ 2023-06-12 17:54 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110229 --- Comment #2 from Larry Fiedler <larry9 at ffdlr dot com> --- Created attachment 55313 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55313&action=edit script to make the c++ file that segfaults ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/110229] Segment fault with initializer an array (unrolled) in a function 2023-06-12 17:44 [Bug c++/110229] New: Segment fault on git clone larry9 at ffdlr dot com 2023-06-12 17:47 ` [Bug c++/110229] Segment fault with initializer an array (unrolled) in a function pinskia at gcc dot gnu.org 2023-06-12 17:54 ` larry9 at ffdlr dot com @ 2023-06-12 18:02 ` pinskia at gcc dot gnu.org 2023-06-12 18:11 ` larry9 at ffdlr dot com 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-06-12 18:02 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110229 --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- By the way it is just a stack overflow while GCC is doing a mark and sweep GC . ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/110229] Segment fault with initializer an array (unrolled) in a function 2023-06-12 17:44 [Bug c++/110229] New: Segment fault on git clone larry9 at ffdlr dot com ` (2 preceding siblings ...) 2023-06-12 18:02 ` [Bug middle-end/110229] " pinskia at gcc dot gnu.org @ 2023-06-12 18:11 ` larry9 at ffdlr dot com 3 siblings, 0 replies; 5+ messages in thread From: larry9 at ffdlr dot com @ 2023-06-12 18:11 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110229 --- Comment #4 from Larry Fiedler <larry9 at ffdlr dot com> --- Yes, I should have experimented with changing the stack size. The structure is now done as an initializer list of an array with no problems. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-06-12 18:11 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2023-06-12 17:44 [Bug c++/110229] New: Segment fault on git clone larry9 at ffdlr dot com 2023-06-12 17:47 ` [Bug c++/110229] Segment fault with initializer an array (unrolled) in a function pinskia at gcc dot gnu.org 2023-06-12 17:54 ` larry9 at ffdlr dot com 2023-06-12 18:02 ` [Bug middle-end/110229] " pinskia at gcc dot gnu.org 2023-06-12 18:11 ` larry9 at ffdlr dot com
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