strace-4.15 hangs on launch

[DHowett-MSFT]

• Your Windows build number: 16215

• What you're doing and what's happening:

$ strace -V
strace -- version 4.15
$ strace ls
<hangs>

• Strace of the failing command, if applicable:

Using strace-4.9 to trace strace-4.15

clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fe7bec809d0) = 14731
rt_sigaction(SIGTTOU, {SIG_IGN, [], SA_RESTORER, 0x7fe7be693030}, NULL, 8) = 0
rt_sigaction(SIGTTIN, {SIG_IGN, [], SA_RESTORER, 0x7fe7be693030}, NULL, 8) = 0
rt_sigaction(SIGHUP, {0x7fe7bee75990, [], SA_RESTORER, 0x7fe7be693030}, NULL, 8) = 0
rt_sigaction(SIGINT, {0x7fe7bee75990, [], SA_RESTORER, 0x7fe7be693030}, NULL, 8) = 0
rt_sigaction(SIGQUIT, {0x7fe7bee75990, [], SA_RESTORER, 0x7fe7be693030}, NULL, 8) = 0
rt_sigaction(SIGPIPE, {0x7fe7bee75990, [], SA_RESTORER, 0x7fe7be693030}, NULL, 8) = 0
rt_sigaction(SIGTERM, {0x7fe7bee75990, [], SA_RESTORER, 0x7fe7be693030}, NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [HUP INT QUIT PIPE TERM], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
wait4(-1, [{WIFSTOPPED(s) && WSTOPSIG(s) == SIGSTOP}], __WALL, NULL) = 14731
rt_sigprocmask(SIG_BLOCK, [HUP INT QUIT PIPE TERM], NULL, 8) = 0
ptrace(PTRACE_GETREGSET, 14731, NT_PRSTATUS, [{0x7fe7bf1066a0, 216}]) = -1 EINVAL (Invalid argument)
ptrace(PTRACE_GETREGS, 14731, 0, 0x7fe7bf1066a0) = 0
ptrace(PTRACE_SETOPTIONS, 14731, 0, PTRACE_O_TRACESYSGOOD|PTRACE_O_TRACEEXEC|PTRACE_O_TRACEEXIT) = -1 EINVAL (Invalid argument)
fstat(2, {st_mode=S_IFCHR|0660, st_rdev=makedev(4, 1), ...}) = 0
ioctl(2, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
write(2, "/usr/bin/strace: PTRACE_SETOPTIO"..., 53/usr/bin/strace: PTRACE_SETOPTIONS: Invalid argument
) = 53
getpid()                                = 14729
kill(14731, SIGCONT)                    = 0
kill(14731, SIGTERM)                    = 0
wait4(14731,

The wait on the subprocess hangs, but only after ptrace(PTRACE_SETOPTIONS, child, ..., PTRACE_O_TRACESYSGOOD|PTRACE_O_TRACEEXEC|PTRACE_O_TRACEEXIT) fails with EINVAL

This appears to be similar to #548, but I cannot reopen it.

[DHowett-MSFT]

It looks like the primary difference between the trace of 4.12 and the trace of 4.15 is PTRACE_O_TRACEEXIT.

[therealkenc]

It is being tracked in #555. There's further discussion about strace-4.recent in #1578 (message).

[benhillis]

Marking as a duplicate of #555.