runtime: crashes on Android O #23750
Description
Android O has a seccomp filter.
Unfortunately it disallows use of open and epoll_wait, which are used by the Go runtime. Fortunately, it allows for openat and epoll_pwait, which map directly to the former ones by passing them the right arguments.
So far as I can see, these support open and epoll_wait:
- https://android.googlesource.com/platform/bionic/+/master/libc/seccomp/arm_app_policy.cpp
- https://android.googlesource.com/platform/bionic/+/master/libc/seccomp/mips_app_policy.cpp
- https://android.googlesource.com/platform/bionic/+/master/libc/seccomp/x86_app_policy.cpp
So far as I can see, these support openat and epoll_pwait:
- https://android.googlesource.com/platform/bionic/+/master/libc/seccomp/arm64_app_policy.cpp
- https://android.googlesource.com/platform/bionic/+/master/libc/seccomp/mips64_app_policy.cpp
- https://android.googlesource.com/platform/bionic/+/master/libc/seccomp/x86_64_app_policy.cpp
In other words, 64-bit architectures are affected. ARM64 was already fixed. This CL fixes the remaining two architectures: https://go-review.googlesource.com/c/go/+/92895