https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90442
Bug ID: 90442
Summary: std::pmr::new_delete_resource->allocate results in
UBSan error member call on address ... which does not
point to an object of type 'memory_resource'
Product: gcc
Version: 9.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: laurynas.biveinis at gmail dot com
Target Milestone: ---
Created attachment 46344
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46344&action=edit
Preprocessed testcase
The following results in an UBSan error:
#include <memory_resource>
int main(void) {
auto * const mem = std::pmr::new_delete_resource()->allocate(10);
}
compiled with g++-9 pmr_san.cpp -fsanitize=undefined -std=c++17 -o pmr_san
results in
../gcc-9/pmr_san2.cpp:4:63: runtime error: member call on address
0x00010752d440 which does not point to an object of type 'memory_resource'
0x00010752d440: note: object is of type '*NSt3pmr12_GLOBAL__N_112newdel_res_tE'
01 00 00 00 c8 7e 51 07 01 00 00 00 00 00 00 00 00 00 00 00 e0 ee 50 07 01
00 00 00 98 ee 50 07
^~~~~~~~~~~~~~~~~~~~~~~
vptr for '*NSt3pmr12_GLOBAL__N_112newdel_res_tE'
/usr/local/Cellar/gcc/9.1.0/include/c++/9.1.0/memory_resource:99:25: runtime
error: member call on address 0x00010752d440 which does not point to an object
of type 'memory_resource'
0x00010752d440: note: object is of type '*NSt3pmr12_GLOBAL__N_112newdel_res_tE'
01 00 00 00 c8 7e 51 07 01 00 00 00 00 00 00 00 00 00 00 00 e0 ee 50 07 01
00 00 00 98 ee 50 07
^~~~~~~~~~~~~~~~~~~~~~~
vptr for '*NSt3pmr12_GLOBAL__N_112newdel_res_tE'
I am not sure whether this is a libstdc++ or UBSan bug (or if I am doing
something wrong). I am attaching a preprocessed version too.
This looks similar to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80963,
triggered by Boost implementation of PMR.
