https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97936
Bug ID: 97936
Summary: [11 Regression] 30_threads/latch/3.cc hangs
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
On Linux/x86-64 with 96 cores, r11-5227 with -m32 compiles30_threads/latch/3.cc
into:
2850299 hjl 20 0 23804 2364 2192 R 99.7 0.0 240:37.77 3.exe
(gdb) bt
#0 0xf7f9155d in __kernel_vsyscall ()
#1 0xf7babd7b in syscall () from /lib/libc.so.6
#2 0x08049566 in std::__detail::__platform_wait<int> (__val=<optimized out>,
__addr=<optimized out>)
at
/export/gnu/import/git/gcc-test-master-intel64-native/bld/x86_64-pc-linux-gnu/32/libstdc++-v3/include/bits/atomic_wait.h:99
#3 std::__atomic_wait<int, std::latch::wait() const::{lambda()#1}>(int const*,
int, std::latch::wait() const::{lambda()#1}) (__addr=0xff85ea30, __old=1,
__pred=...)
at
/export/gnu/import/git/gcc-test-master-intel64-native/bld/x86_64-pc-linux-gnu/32/libstdc++-v3/include/bits/atomic_wait.h:276
#4 0x08049883 in std::latch::wait (this=0xff85ea30)
at
/export/gnu/import/git/gcc-test-master-intel64-native/bld/x86_64-pc-linux-gnu/32/libstdc++-v3/include/latch:75
#5 std::latch::arrive_and_wait (__update=1, this=0xff85ea30)
at
/export/gnu/import/git/gcc-test-master-intel64-native/bld/x86_64-pc-linux-gnu/32/libstdc++-v3/include/latch:82
#6 test01 ()
at
/export/gnu/import/git/gcc-test-master-intel64-native/src-master/libstdc++-v3/testsuite/30_threads/latch/3.cc:43
#7 0x080492ef in main ()
at
/export/gnu/import/git/gcc-test-master-intel64-native/src-master/libstdc++-v3/testsuite/30_threads/latch/3.cc:66
(gdb)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0xff85ea30, FUTEX_WAIT_PRIVATE, 1, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
