x/sys/unix: Android x86_64 emulator crashes when using the pipe syscall

[cmcewen]

What version of Go are you using (go version)?

$ go version
go version go1.13.15 darwin/amd64

I am using gomobile to compile a library to run on Android

Does this issue reproduce with the latest release?

Yes - it is an issue in golang.org/x/sys

What operating system and processor architecture are you using (go env)?

I am running a library compiled with gomobile running on the AOSP API 29 x86_64 emulator

What did you do?

Ran the app and called the library

What did you expect to see?

The app run fine

What did you see instead?

The app crashed:

08-10 17:54:49.398  5047  5047 F DEBUG   : Revision: '0'
08-10 17:54:49.398  5047  5047 F DEBUG   : ABI: 'x86_64'
08-10 17:54:49.398  5047  5047 F DEBUG   : pid: 4938, tid: 4958, name: XXXXX
08-10 17:54:49.398  5047  5047 F DEBUG   : signal 31 (SIGSYS), code 1 (SYS_SECCOMP), fault addr --------
08-10 17:54:49.398  5047  5047 F DEBUG   : Cause: seccomp prevented call to disallowed x86_64 system call 22

Using strace I was able to track it down to pipe:
9930 rt_tgsigqueueinfo(9900, 9930, SIGSYS, {si_signo=SIGSYS, si_code=SYS_SECCOMP, si_call_addr=0x7d49d5a145a6, si_syscall=__NR_pipe, si_arch=AUDIT_ARCH_X86_64}) = 0

[dmitshur]

/cc @ianlancetaylor @tklauser @hyangah @hajimehoshi

[ianlancetaylor]

Do you see the same problem if you call syscall.Pipe? Seems to me that you would, but it would be nice to check. Thanks.

[cmcewen]

This PR was able to fix the crash for me: golang/sys#75

[gopherbot]

Change https://golang.org/cl/350530 mentions this issue: syscall: implement Pipe using pipe2 syscall on all linux platforms

[gopherbot]

Change https://golang.org/cl/350549 mentions this issue: unix: implement Pipe using pipe2 syscall on all linux platforms