https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65904
Bug ID: 65904
Summary: Memory corruption with acc_shutdown, nvptx offloading,
libgomp.oacc-c-c++-common/asyncwait-1.c
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: libgomp
Assignee: jules at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
Seems to have appeared with the "recent" libgomp changes (r221878, r221922).
*** glibc detected *** ./asyncwait-1.exe: double free or corruption
(!prev): 0x0000000001cfdcf0 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x7eb96)[0x2ac3b574bb96]
[...]/build-gcc/x86_64-unknown-linux-gnu/./libgomp/.libs/libgomp.so.1(+0x153dd)[0x2ac3b52a33dd]
[...]/build-gcc/x86_64-unknown-linux-gnu/./libgomp/.libs/libgomp.so.1(acc_shutdown+0x115)[0x2ac3b52a57a5]
./asyncwait-1.exe[0x40333d]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x2ac3b56ee76d]
./asyncwait-1.exe[0x400fb9]
======= Memory map: ========
[...]
Valgrind reports:
[...]
==24645== Invalid read of size 8
==24645== at 0x60A53C8: gomp_free_memmap (target.c:914)
==24645== by 0x60A77A4: acc_shutdown (oacc-init.c:229)
==24645== by 0x402254: main (in [...]/asyncwait-1.exe)
==24645== Address 0xda94f78 is 88 bytes inside a block of size 1,512
free'd
==24645== at 0x4C2A739: free (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==24645== by 0x60A53DC: gomp_free_memmap (target.c:917)
==24645== by 0x60A77A4: acc_shutdown (oacc-init.c:229)
==24645== by 0x402254: main (in [...]/asyncwait-1.exe)
[...]
