Auto merge of #820 - malbarbo:s390x-test, r=alexcrichton

Run s390x tests on qemu system

qemu in user mode cannot run binaries produced by rustc (it hangs), so we run the tests in a fully virtualized s390x machine using qemu-system-s390x.

Some constants had to be fixed.

Author: bors

ci/docker/s390x-unknown-linux-gnu/Dockerfile

@@ -1,12 +1,18 @@
 FROM ubuntu:17.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
-        gcc libc6-dev qemu-user ca-certificates \
-        gcc-s390x-linux-gnu libc6-dev-s390x-cross
+        curl ca-certificates \
+        gcc libc6-dev \
+        gcc-s390x-linux-gnu libc6-dev-s390x-cross \
+        qemu-system-s390x \
+        cpio
+
+COPY linux-s390x.sh /
+RUN bash /linux-s390x.sh
+
+COPY test-runner-linux /
 
 ENV CARGO_TARGET_S390X_UNKNOWN_LINUX_GNU_LINKER=s390x-linux-gnu-gcc \
-    # TODO: in theory we should execute this, but qemu segfaults immediately :(
-    # CARGO_TARGET_S390X_UNKNOWN_LINUX_GNU_RUNNER="qemu-s390x -L /usr/s390x-linux-gnu" \
-    CARGO_TARGET_S390X_UNKNOWN_LINUX_GNU_RUNNER=true \
+    CARGO_TARGET_S390X_UNKNOWN_LINUX_GNU_RUNNER="/test-runner-linux s390x" \
     CC_s390x_unknown_linux_gnu=s390x-linux-gnu-gcc \
     PATH=$PATH:/rust/bin

ci/linux-s390x.sh

@@ -0,0 +1,18 @@
+set -ex
+
+mkdir -m 777 /qemu
+cd /qemu
+
+curl -LO https://github.com/qemu/qemu/raw/master/pc-bios/s390-ccw.img
+curl -LO http://ftp.debian.org/debian/dists/testing/main/installer-s390x/20170828/images/generic/kernel.debian
+curl -LO http://ftp.debian.org/debian/dists/testing/main/installer-s390x/20170828/images/generic/initrd.debian
+
+mv kernel.debian kernel
+mv initrd.debian initrd.gz
+
+mkdir init
+cd init
+gunzip -c ../initrd.gz | cpio -id
+rm ../initrd.gz
+cp /usr/s390x-linux-gnu/lib/libgcc_s.so.1 usr/lib/
+chmod a+w .

ci/test-runner-linux

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -e
+
+arch=$1
+prog=$2
+
+cd /qemu/init
+cp -f $2 prog
+find . | cpio --create --format='newc' --quiet | gzip > ../initrd.gz
+cd ..
+
+timeout 30s qemu-system-$arch \
+  -m 1024 \
+  -nographic \
+  -kernel kernel \
+  -initrd initrd.gz \
+  -append init=/prog > output || true
+
+# remove kernel messages
+tr -d '\r' < output | egrep -v '^\['
+
+grep PASSED output > /dev/null

src/unix/notbsd/linux/s390x.rs

@@ -323,7 +323,7 @@ pub const SFD_CLOEXEC: ::c_int = 0x080000;
 pub const NCCS: usize = 32;
 
 pub const O_TRUNC: ::c_int = 512;
-pub const O_LARGEFILE: ::c_int = 0o0100000;
+pub const O_LARGEFILE: ::c_int = 0;
 pub const O_NOATIME: ::c_int = 0o1000000;
 pub const O_CLOEXEC: ::c_int = 0x80000;
 pub const O_PATH: ::c_int = 0o10000000;
@@ -913,8 +913,8 @@ pub const ECHOPRT: ::tcflag_t = 0o002000;
 pub const ECHOKE: ::tcflag_t = 0o004000;
 pub const PENDIN: ::tcflag_t = 0o040000;
 
-pub const POLLWRNORM: ::c_short = 0x004;
-pub const POLLWRBAND: ::c_short = 0x100;
+pub const POLLWRNORM: ::c_short = 0x100;
+pub const POLLWRBAND: ::c_short = 0x200;
 
 pub const IXON: ::tcflag_t = 0o002000;
 pub const IXOFF: ::tcflag_t = 0o010000;
@@ -1219,20 +1219,20 @@ pub const SYS_mlock2: ::c_long = 374;
 pub const SYS_copy_file_range: ::c_long = 375;
 pub const SYS_preadv2: ::c_long = 376;
 pub const SYS_pwritev2: ::c_long = 377;
-pub const SYS_lchown: ::c_long = 16;
-pub const SYS_setuid: ::c_long = 23;
-pub const SYS_getuid: ::c_long = 24;
-pub const SYS_setgid: ::c_long = 46;
-pub const SYS_getgid: ::c_long = 47;
-pub const SYS_geteuid: ::c_long = 49;
-pub const SYS_setreuid: ::c_long = 70;
-pub const SYS_setregid: ::c_long = 71;
-pub const SYS_getrlimit: ::c_long = 76;
-pub const SYS_getgroups: ::c_long = 80;
-pub const SYS_fchown: ::c_long = 95;
-pub const SYS_setresuid: ::c_long = 164;
-pub const SYS_setresgid: ::c_long = 170;
-pub const SYS_getresgid: ::c_long = 171;
+pub const SYS_lchown: ::c_long = 198;
+pub const SYS_setuid: ::c_long = 213;
+pub const SYS_getuid: ::c_long = 199;
+pub const SYS_setgid: ::c_long = 214;
+pub const SYS_getgid: ::c_long = 200;
+pub const SYS_geteuid: ::c_long = 201;
+pub const SYS_setreuid: ::c_long = 203;
+pub const SYS_setregid: ::c_long = 204;
+pub const SYS_getrlimit: ::c_long = 191;
+pub const SYS_getgroups: ::c_long = 205;
+pub const SYS_fchown: ::c_long = 207;
+pub const SYS_setresuid: ::c_long = 208;
+pub const SYS_setresgid: ::c_long = 210;
+pub const SYS_getresgid: ::c_long = 211;
 pub const SYS_select: ::c_long = 142;
 pub const SYS_getegid: ::c_long = 202;
 pub const SYS_setgroups: ::c_long = 206;