https://bugs.llvm.org/show_bug.cgi?id=39664
Bug ID: 39664
Summary: Test getline_nohang.cc in fact hangs
Product: compiler-rt
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: tsan
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
I am seeing the tsan test getline_nohang.cc hang quite frequently on Linux SLES
12, on both X86_64 and AArch64. The backtrace indicates it's stuck waiting on
an I/O lock which is exactly the behavior the test is testing for. So it seems
the fix for this test isn't enough for some Linux variants.
(gdb) bt
#0 0x00007fb3e26cd13b in __lll_lock_wait_private () from /lib64/libc.so.6
#1 0x00007fb3e264cdc2 in __GI__IO_flush_all () from /lib64/libc.so.6
#2 0x00007fb3e264cebf in _IO_cleanup () from /lib64/libc.so.6
#3 0x00007fb3e260e0eb in __run_exit_handlers () from /lib64/libc.so.6
#4 0x00007fb3e260e185 in exit () from /lib64/libc.so.6
#5 0x00007fb3e25f76ec in __libc_start_main () from /lib64/libc.so.6
#6 0x0000000000420639 in _start () at ../sysdeps/x86_64/start.S:118
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