ARM CI (#148)

* Add ARM setup

* Factor what can be into common scripts

azure-pipelines.yml

@@ -85,42 +85,65 @@ jobs:
 
   steps:
   - script: |
-      sudo update-alternatives --install /usr/bin/cc cc /usr/bin/$(CC) 100
-      sudo update-alternatives --set cc /usr/bin/$(CC)
-
-      sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/$(CXX) 100
-      sudo update-alternatives --set c++ /usr/bin/$(CXX)
-
-      CMAKE_CXX_FLAGS="-std=c++17"
-      if [[ "$CXX" == clang++* ]]; then CMAKE_CXX_FLAGS+=" -stdlib=libstdc++"; fi
-
-    displayName: 'Select compiler version'
-
-  - task: CMake@1
-    displayName: 'CMake .. $(CMakeArgs) -GNinja -DCMAKE_BUILD_TYPE=$(BuildType) -DCMAKE_CXX_FLAGS="$CMAKE_CXX_FLAGS" -DSNMALLOC_CI_BUILD=On -DSNMALLOC_RUST_SUPPORT=On'
-    inputs:
-      cmakeArgs: '.. $(CMakeArgs) -GNinja -DCMAKE_BUILD_TYPE=$(BuildType) -DCMAKE_CXX_FLAGS="$CMAKE_CXX_FLAGS" -DSNMALLOC_CI_BUILD=On -DSNMALLOC_RUST_SUPPORT=On'
+      ci/scripts/build.sh
+    env:
+      CC: $(CC)
+      CXX: $(CXX)
+      BUILD_TYPE: $(BuildType)
+      CMAKE_ARGS: $(CMakeArgs)
+    failOnStderr: true
+    displayName: 'Build'
 
   - script: |
-      ninja
-
-    workingDirectory: build
+      ci/scripts/test.sh
+    env:
+      SELF_HOST: $(SelfHost)
+      BUILD_TYPE: $(BuildType)
     failOnStderr: true
-    displayName: 'Compile'
+    displayName: 'Test'
+
+- job:
+  displayName: 'ARM64 Linux'
+  pool:
+    vmImage: 'ubuntu-18.04'
+  
+  strategy:
+    matrix:
+      Clang-9 Debug:
+        CC: clang-9
+        CXX: clang++-9
+        BuildType: Debug
+        SelfHost: false
+        CMakeArgs: ''
+
+      Clang-9 Release:
+        CC: clang-9
+        CXX: clang++-9
+        BuildType: Release
+        SelfHost: false
+        CMakeArgs: ''
+  
+  steps:
+  - script: |
+      sudo docker run --rm --privileged multiarch/qemu-user-static:register --reset
+    displayName: 'Enable QEmu'
 
   - script: |
-      if [ $(SelfHost) = false ]; then
-        ctest -j 4 --output-on-failure -C $(BuildType)
-      else
-        sudo cp libsnmallocshim.so libsnmallocshim-1mib.so /usr/local/lib/
-        ninja clean
-        LD_PRELOAD=/usr/local/lib/libsnmallocshim.so ninja
-        ninja clean
-        LD_PRELOAD=/usr/local/lib/libsnmallocshim-1mib.so ninja
-      fi
+      sudo docker run -v $PWD:/src \
+      -e CC=$(CC) \
+      -e CXX=$(CXX) \
+      -e BUILD_TYPE=$(BuildType) \
+      -e CMAKE_ARGS=$(CMakeArgs) \
+      snmallocciteam/build_linux_arm64:latest \
+      ci/scripts/build.sh
+    displayName: 'Build'
 
-    workingDirectory: build
-    failOnStderr: true
+  - script: |
+      sudo docker run -v $PWD:/src \
+      -e BUILD_TYPE=$(BuildType) \
+      -e SELF_HOST=$(SelfHost) \
+      snmallocciteam/build_linux_arm64:latest \
+      ci/scripts/test.sh
     displayName: 'Test'
 
 - job:

ci/linux_arm64

@@ -0,0 +1,7 @@
+FROM multiarch/ubuntu-core:arm64-bionic
+
+WORKDIR /src
+
+RUN apt update \
+    && apt install --no-install-recommends -y ninja-build clang++-9 cmake \
+    && apt -y clean

ci/scripts/build.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+mkdir build
+cd build
+
+CMAKE_CXX_FLAGS="-std=c++17"
+if [[ "$CXX" == clang++* ]]; then
+    CMAKE_CXX_FLAGS+=" -stdlib=libstdc++";
+fi
+
+cmake \
+  $CMAKE_ARGS \
+  -GNinja \
+  -DSNMALLOC_CI_BUILD=ON \
+  -DSNMALLOC_RUST_SUPPORT=ON \
+  -DSNMALLOC_QEMU_WORKAROUND=ON \
+  -DCMAKE_BUILD_TYPE=$BUILD_TYPE \
+  -DCMAKE_CXX_FLAGS="$CMAKE_CXX_FLAGS" \
+  ..
+ninja

ci/scripts/test.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+cd build
+if [ $SELF_HOST = false ]; then
+    ctest -j 4 --output-on-failure -C $BUILD_TYPE
+else
+    sudo cp libsnmallocshim.so libsnmallocshim-1mib.so /usr/local/lib/
+    ninja clean
+    LD_PRELOAD=/usr/local/lib/libsnmallocshim.so ninja
+    ninja clean
+    LD_PRELOAD=/usr/local/lib/libsnmallocshim-1mib.so ninja
+fi

src/aal/aal_arm.h

@@ -45,7 +45,7 @@ namespace snmalloc
 #ifdef _MSC_VER
       __prefetch(ptr);
 #else
-      __asm__ inline("prfm pldl1keep, [%0]" : "=r"(ptr));
+      __asm__ volatile("prfm pldl1keep, [%0]" : "=r"(ptr));
 #endif
     }
   };