#!/usr/bin/env bash
#############################################################################
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## $QT_BEGIN_LICENSE:LGPL21$
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set -ex

# shellcheck source=../common/unix/DownloadURL.sh
source "${BASH_SOURCE%/*}/../common/unix/DownloadURL.sh"
# shellcheck source=../common/unix/SetEnvVar.sh
source "${BASH_SOURCE%/*}/../common/unix/SetEnvVar.sh"

sudo apt-get -y install automake autoconf libtool

DownloadAndBuiltQemu () {
    tempDir=$(mktemp -d)
    cd ${tempDir}

    commit_sha=c7f1cf01b8245762ca5864e835d84f6677ae8b1f
    qemu_tarball="qemu_tarball.zip"
    PrimaryUrl="http://ci-files01-hki.intra.qt.io/input/qemu/${qemu_tarball}"
    AltUrl="https://github.com/qemu/qemu/archive/${commit_sha}.zip"
    SHA1="351289c4420f16575bff060f91ce540d7b3fa2ab"
    DownloadURL "$PrimaryUrl" "$AltUrl" "$SHA1" "$qemu_tarball"
    unzip ${qemu_tarball}
    cd qemu-${commit_sha}

    fixes=( 75e5b70e6b5dcc4f2219992d7cffa462aa406af0 04b33e21866412689f18b7ad6daf0a54d8f959a7 cd8133679f7e0e2c292f631f1c78b2452d2435c7 )
    fixes_sha1sums=( e53c4f567b461e7e2905636b369c4458ee8c0277 1914e5fa2f707d69d86ceb7c94957d096c8e8db4 eeca01c307d37eb362913b3f811034d5ac77cac8 )
    for i in $(seq 0 $((${#fixes[@]} - 1))); do
        PrimaryUrl="http://ci-files01-hki.intra.qt.io/input/qemu/${fixes[$i]}.diff"
        AltUrl="https://github.com/qemu/qemu/commit/${fixes[$i]}.diff"
        SHA1="${fixes_sha1sums[$i]}"
        DownloadURL  "$PrimaryUrl" "$AltUrl" "$SHA1" "${fixes[$i]}.diff"
        patch -p1 < ${fixes[$i]}.diff
    done

patch -p1 <<EOT
From aad6a8f17dc7ad3681d2d98a01e474a8904a129b Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@qt.io>
Date: Fri, 24 Aug 2018 10:38:29 +0200
Subject: [PATCH] linux-user: add support for MADV_DONTNEED

Most flags to madvise() are just hints, so typically ignoring the
syscall and returning okay is fine. However applications exist that do
rely on MADV_DONTNEED behavior to guarantee that upon subsequent access
the mapping is refreshed from the backing file or zero for anonymous
mappings.
---
 linux-user/mmap.c    | 18 ++++++++++++++++++
 linux-user/qemu.h    |  1 +
 linux-user/syscall.c |  6 +-----
 3 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 61685bf79e..cb3069f27e 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -764,3 +764,16 @@ int target_msync(abi_ulong start, abi_ulong len, int flags)
     start &= qemu_host_page_mask;
     return msync(g2h(start), end - start, flags);
 }
+
+int target_madvise(abi_ulong start, abi_ulong len, int flags)
+{
+    /* A straight passthrough may not be safe because qemu sometimes
+       turns private file-backed mappings into anonymous mappings.
+       Most flags are hints, except for MADV_DONTNEED that applications
+       may rely on to zero out pages, so we pass that through.
+       Otherwise returning success is ok. */
+    if (flags & MADV_DONTNEED) {
+        return madvise(g2h(start), len, MADV_DONTNEED);
+    }
+    return 0;
+}
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 4edd7d0c08..3c975909a1 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -429,6 +429,7 @@ int target_munmap(abi_ulong start, abi_ulong len);
 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
                        abi_ulong new_size, unsigned long flags,
                        abi_ulong new_addr);
+int target_madvise(abi_ulong start, abi_ulong len, int flags);
 int target_msync(abi_ulong start, abi_ulong len, int flags);
 extern unsigned long last_brk;
 extern abi_ulong mmap_next_start;
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 11a311f9db..94d8abc745 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -11148,11 +11148,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,

 #ifdef TARGET_NR_madvise
     case TARGET_NR_madvise:
-        /* A straight passthrough may not be safe because qemu sometimes
-           turns private file-backed mappings into anonymous mappings.
-           This will break MADV_DONTNEED.
-           This is a hint, so ignoring and returning success is ok.  */
-        ret = get_errno(0);
+        ret = get_errno(target_madvise(arg1, arg2, arg3));
         break;
 #endif
 #if TARGET_ABI_BITS == 32
--
2.17.1
EOT

patch -p1 <<EOT
From fb4f0fa319e757c083f0b3674f575a09c323f5aa Mon Sep 17 00:00:00 2001
From: Assam Boudjelthia <assam.boudjelthia@qt.io>
Date: Tue, 20 Aug 2019 09:46:46 +0300
Subject: [PATCH] Suppress unsupported syscall and ioctl debug messages

Those messages were spamming the CI tests output, thus they can
only be shown by defining environment variable QEMU_SYSCALL_DEBUG=true

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 94d8abc745..e72cfb0cb5 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -5479,7 +5479,8 @@ static abi_long do_ioctl(int fd, int cmd, abi_long arg)
     ie = ioctl_entries;
     for(;;) {
         if (ie->target_cmd == 0) {
-            gemu_log("Unsupported ioctl: cmd=0x%04lx\n", (long)cmd);
+            if (getenv("QEMU_SYSCALL_DEBUG"))
+                gemu_log("Unsupported ioctl: cmd=0x%04lx\n", (long)cmd);
             return -TARGET_ENOSYS;
         }
         if (ie->target_cmd == cmd)
@@ -12172,7 +12173,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,

     default:
     unimplemented:
-        gemu_log("qemu: Unsupported syscall: %d\n", num);
+        if (getenv("QEMU_SYSCALL_DEBUG"))
+            gemu_log("qemu: Unsupported syscall: %d\n", num);
 #if defined(TARGET_NR_setxattr) || defined(TARGET_NR_get_thread_area) || defined(TARGET_NR_getdomainname) || defined(TARGET_NR_set_robust_list)
     unimplemented_nowarn:
 #endif
--
2.17.1
EOT

    ./configure --disable-bsd-user --disable-guest-agent --disable-strip --disable-werror --disable-gcrypt --disable-debug-info --disable-debug-tcg --disable-tcg-interpreter --enable-attr --disable-brlapi --disable-linux-aio --disable-bzip2 --disable-bluez --disable-cap-ng --disable-curl --disable-fdt --disable-glusterfs --disable-gnutls --disable-nettle --disable-gtk --disable-rdma --disable-libiscsi --disable-vnc-jpeg --disable-kvm --disable-lzo --disable-curses --disable-libnfs --disable-numa --disable-opengl --disable-vnc-png --disable-rbd --disable-vnc-sasl --disable-sdl --disable-seccomp --disable-smartcard --disable-snappy --disable-spice --disable-libusb --disable-usb-redir --disable-vde --disable-vhost-net --disable-virglrenderer --disable-virtfs --disable-vnc --disable-vte --disable-xen --disable-xen-pci-passthrough --disable-xfsctl --enable-linux-user --disable-system --disable-blobs --disable-tools --target-list=arm-linux-user,aarch64-linux-user --static --disable-pie --disable-docs
    make
    sudo make install

# To create a new qemu.deb file add "--prefix=${tempDir}/qemu_prebuilt/usr/local/" to ./configure
# Then add the following commands, make sure to change the version number.
#     mkdir ${tempDir}/qemu_prebuilt/DEBIAN
#     echo -n "Package: QEMU
# Version: 2.8.0-833-g09cc6b1ab7-dirty
# Section: misc
# Priority: important
# Architecture: i386
# Maintainer: Fabrice Bellard and the QEMU Project developers
# Description: QEMU for arm and arm64" > ${tempDir}/qemu_prebuilt/DEBIAN/control
#
#         dpkg-deb --build ${tempDir}/qemu_prebuilt/
        rm -rf ${tempDir}
}

qemu_prebuilt="/tmp/qemu_prebuilt.deb"
PrimaryUrl="http://ci-files01-hki.intra.qt.io/input/qemu/qemu_prebuilt.deb"
AltUrl=${PrimaryUrl}
SHA1="a50bea7ee79ca7b7b6eebe55f02853997d445ea4"
DownloadURL "$PrimaryUrl" "$AltUrl" "$SHA1" "$qemu_prebuilt" 2>&1 && success=$? || success=$?
if [ $success -eq 0  ]; then
    sudo dpkg -i ${qemu_prebuilt}
else
    DownloadAndBuiltQemu
fi

# Enable binfmt support
sudo apt-get -y install binfmt-support

# Install qemu binfmt for 32bit and 64bit arm architectures
sudo update-binfmts --package qemu-arm --install arm /usr/local/bin/qemu-arm \
--magic "\x7f\x45\x4c\x46\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00" \
--mask "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"
sudo update-binfmts --package qemu-aarch64 --install aarch64 /usr/local/bin/qemu-aarch64 \
--magic "\x7f\x45\x4c\x46\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00" \
--mask "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"

# First test using QFont fails if fonts-noto-cjk is installed. This happens because
# running fontcache for that font takes > 5 mins when run on QEMU. Running fc-cache
# doesn't help since host version creates cache for a wrong architecture and running
# armv7 fc-cache segfaults on QEMU.
sudo DEBIAN_FRONTEND=noninteractive apt-get -y remove fonts-noto-cjk

# If normal fontconfig paths are used, qemu parses what ever files it finds from
# the toolchain sysroot and the rest from the system fonts.
QEMU_FONTCONFPATH=~/qemu_fonts
QEMU_FONTCONFFILE=$QEMU_FONTCONFPATH/fonts.qemu.conf
mkdir -p $QEMU_FONTCONFPATH

# Copy system font configuration files from system to a location with prefix that can't be found from
# the toolchain sysroot
cp -Lr /etc/fonts/* $QEMU_FONTCONFPATH

# Create links to the actual system font files
ln -s /usr/share/fonts $QEMU_FONTCONFPATH/fonts
ln -s /usr/local/share/fonts $QEMU_FONTCONFPATH/local_fonts

# Change font configuration file to point to files that can't be found from the toolchain sysroot
sed $QEMU_FONTCONFPATH/fonts.conf -e "s:conf.d:$QEMU_FONTCONFPATH/conf.d:" > $QEMU_FONTCONFFILE
sed $QEMU_FONTCONFFILE -e "s:/usr/share/fonts:$QEMU_FONTCONFPATH/fonts:" -i
sed $QEMU_FONTCONFFILE -e "s:/usr/local/share/fonts:$QEMU_FONTCONFPATH/local_fonts:" -i

# Set QEMU font configuration variables
qemu_env="FONTCONFIG_FILE=$QEMU_FONTCONFFILE"
qemu_env="${qemu_env},FONTCONFIG_PATH=$QEMU_FONTCONFPATH"

# Disable QtWayland window decorations, as they cause flakiness when used inside qemu (QTBUG-66173)
qemu_env="${qemu_env},QT_WAYLAND_DISABLE_WINDOWDECORATION=1"

SetEnvVar "QEMU_SET_ENV" "\"${qemu_env}\""