[android] Implement android test runner for core unit tests

Makefile

@@ -500,7 +500,7 @@ MBGL_ANDROID_ABIS += x86-64;x86_64
 MBGL_ANDROID_LOCAL_WORK_DIR = /data/local/tmp/core-tests
 MBGL_ANDROID_LIBDIR = lib$(if $(filter arm-v8 x86-64,$1),64)
 MBGL_ANDROID_DALVIKVM = dalvikvm$(if $(filter arm-v8 x86-64,$1),64,32)
-MBGL_ANDROID_APK_SUFFIX = $(if $(filter Release,$(BUILDTYPE)),release-unsigned,debug)
+MBGL_ANDROID_APK_SUFFIX = $(if $(filter Release,$(BUILDTYPE)),release,debug)
 MBGL_ANDROID_CORE_TEST_DIR = platform/android/MapboxGLAndroidSDK/.externalNativeBuild/cmake/$(buildtype)/$2/core-tests
 MBGL_ANDROID_STL ?= c++_static
 MBGL_ANDROID_GRADLE = ./gradlew --parallel --max-workers=$(JOBS) -Pmapbox.buildtype=$(buildtype) -Pmapbox.stl=$(MBGL_ANDROID_STL)
@@ -542,27 +542,21 @@ android-$1: platform/android/gradle/configuration.gradle
 android-core-test-$1: android-test-lib-$1
 	# Compile main sources and extract the classes (using the test app to get all transitive dependencies in one place)
 	mkdir -p $(MBGL_ANDROID_CORE_TEST_DIR)
-	unzip -o platform/android/MapboxGLAndroidSDKTestApp/build/outputs/apk/MapboxGLAndroidSDKTestApp-$(MBGL_ANDROID_APK_SUFFIX).apk classes.dex -d $(MBGL_ANDROID_CORE_TEST_DIR)
-
-	# Compile Test runner
-	find platform/android/src/test -name "*.java" > $(MBGL_ANDROID_CORE_TEST_DIR)/java-sources.txt
-	javac -sourcepath platform/android/src/test -d $(MBGL_ANDROID_CORE_TEST_DIR) -source 1.7 -target 1.7 @$(MBGL_ANDROID_CORE_TEST_DIR)/java-sources.txt
-
-	# Combine and dex
-	cd $(MBGL_ANDROID_CORE_TEST_DIR) && $(ANDROID_HOME)/build-tools/25.0.0/dx --dex --output=test.jar *.class classes.dex
+	unzip -o platform/android/MapboxGLAndroidSDKTestApp/build/outputs/apk/$(buildtype)/MapboxGLAndroidSDKTestApp-$(MBGL_ANDROID_APK_SUFFIX).apk classes.dex -d $(MBGL_ANDROID_CORE_TEST_DIR)
 
 run-android-core-test-$1-%: android-core-test-$1
 	# Ensure clean state on the device
-	adb shell "rm -Rf $(MBGL_ANDROID_LOCAL_WORK_DIR) && mkdir -p $(MBGL_ANDROID_LOCAL_WORK_DIR)/test"
+	adb shell "rm -Rf $(MBGL_ANDROID_LOCAL_WORK_DIR) && mkdir -p $(MBGL_ANDROID_LOCAL_WORK_DIR)/test && mkdir -p $(MBGL_ANDROID_LOCAL_WORK_DIR)/mapbox-gl-js/src/style-spec/reference"
 
 	# Push all needed files to the device
-	adb push $(MBGL_ANDROID_CORE_TEST_DIR)/test.jar $(MBGL_ANDROID_LOCAL_WORK_DIR) > /dev/null 2>&1
+	adb push $(MBGL_ANDROID_CORE_TEST_DIR)/classes.dex $(MBGL_ANDROID_LOCAL_WORK_DIR) > /dev/null 2>&1
+	adb push platform/android/MapboxGLAndroidSDK/build/intermediates/intermediate-jars/$(buildtype)/jni/$2/libmapbox-gl.so $(MBGL_ANDROID_LOCAL_WORK_DIR) > /dev/null 2>&1
 	adb push test/fixtures $(MBGL_ANDROID_LOCAL_WORK_DIR)/test > /dev/null 2>&1
-	adb push platform/android/MapboxGLAndroidSDK/build/intermediates/bundles/default/jni/$2/libmapbox-gl.so $(MBGL_ANDROID_LOCAL_WORK_DIR) > /dev/null 2>&1
-	adb push platform/android/MapboxGLAndroidSDK/build/intermediates/bundles/default/jni/$2/libmbgl-test.so $(MBGL_ANDROID_LOCAL_WORK_DIR) > /dev/null 2>&1
+	adb push mapbox-gl-js/src/style-spec/reference/v8.json $(MBGL_ANDROID_LOCAL_WORK_DIR)/mapbox-gl-js/src/style-spec/reference > /dev/null 2>&1
+	adb push platform/android/MapboxGLAndroidSDK/build/intermediates/cmake/$(buildtype)/obj/$2/mbgl-test $(MBGL_ANDROID_LOCAL_WORK_DIR) > /dev/null 2>&1
 
 	# Kick off the tests
-	adb shell "export LD_LIBRARY_PATH=/system/$(MBGL_ANDROID_LIBDIR):$(MBGL_ANDROID_LOCAL_WORK_DIR) && cd $(MBGL_ANDROID_LOCAL_WORK_DIR) && $(MBGL_ANDROID_DALVIKVM) -cp $(MBGL_ANDROID_LOCAL_WORK_DIR)/test.jar Main --gtest_filter=$$*"
+	adb shell "export LD_LIBRARY_PATH=$(MBGL_ANDROID_LOCAL_WORK_DIR) && cd $(MBGL_ANDROID_LOCAL_WORK_DIR) && chmod +x mbgl-test && ./mbgl-test --class_path=$(MBGL_ANDROID_LOCAL_WORK_DIR)/classes.dex --gtest_filter=$$*"
 
 	# Gather the results and unpack them
 	adb shell "cd $(MBGL_ANDROID_LOCAL_WORK_DIR) && tar -cvzf results.tgz test/fixtures/*  > /dev/null 2>&1"

platform/android/config.cmake

@@ -85,23 +85,25 @@ target_link_libraries(mapbox-gl
     PRIVATE mbgl-filesource
 )
 
-## Test library ##
-
-set(MBGL_TEST_TARGET_TYPE "library")
+## Test executable ##
 macro(mbgl_platform_test)
     target_sources(mbgl-test
-        PRIVATE platform/default/src/mbgl/test/main.cpp
-
-        # Main test entry point
-        platform/android/src/test/main.jni.cpp
+        PRIVATE platform/android/src/test/test_runner.cpp
+        PRIVATE platform/android/src/test/runtime.cpp
     )
 
     target_include_directories(mbgl-test
         PRIVATE platform/android/include
     )
 
+    set_target_properties(mbgl-test
+        PROPERTIES
+        LINK_FLAGS
+        "-fPIE -pie \
+        -Wl,--export-dynamic \
+        -Wl,--version-script=${CMAKE_SOURCE_DIR}/platform/android/src/test/version-script")
+
     target_link_libraries(mbgl-test
-        PRIVATE mbgl-core
         PRIVATE mbgl-filesource
     )
 endmacro()

platform/android/src/test/Main.java

@@ -1,15 +0,0 @@
-
-public class Main {
-    public native void runAllTests(String[] args);
-
-    public static void main(String[] args) throws Exception {
-        // Load the tests
-        System.loadLibrary("mbgl-test");
-
-        // Run the tests
-        new Main().runAllTests(args);
-
-        // Exit explicitly otherwise dalvikvm won't quit
-        System.exit(0);
-    }
-}

platform/android/src/test/main.jni.cpp

@@ -1,76 +0,0 @@
-#include "../jni.hpp"
-
-#include <jni/jni.hpp>
-
-#include <mbgl/util/logging.hpp>
-#include <mbgl/test.hpp>
-
-#include <vector>
-
-namespace {
-
-// Main class (entry point for tests from dalvikvm)
-struct Main {
-    static constexpr auto Name() {
-        return "Main";
-    }
-
-    /**
-     * JNI Bound to Main#runAllTests()
-     */
-    static void runAllTests(jni::JNIEnv& env, const jni::Object<Main>&, const jni::Array<jni::String>& args) {
-        mbgl::Log::Warning(mbgl::Event::JNI, "Starting tests");
-
-        // We need to create a copy of the argv data since Java-internals are stored in UTF-16.
-        std::vector<std::string> data;
-        // Add a fake first argument to align indices. Google Test expects the first argument to
-        // start at index 1; index 0 is the name of the executable.
-        data.push_back("main.jar");
-        const int argc = args.Length(env);
-        for (auto i = 0; i < argc; i++) {
-            data.emplace_back(jni::Make<std::string>(env, args.Get(env, i)));
-        }
-
-        // Create an array of char pointers that point back to the data array.
-        std::vector<const char*> argv;
-        for (const auto& arg : data) {
-            argv.push_back(arg.data());
-        }
-        mbgl::runTests(argv.size(), const_cast<char**>(argv.data()));
-    }
-};
-
-} // namespace
-
-// We're declaring the function, which is libandroid_runtime.so.
-// It is defined in AndroidRuntime.cpp:
-// https://github.com/android/platform_frameworks_base/blob/master/core/jni/AndroidRuntime.cpp
-// Once this symbol goes away, we'll have to revisit.
-// This method loads and registers all of the Android-native frameworks so that we can use
-// android.util.Log, android.graphics.Bitmap and so on.
-// Setting the weak attribute tells the linker that this symbol is loaded at runtime and avoids
-// a missing symbol error.
-namespace android {
-struct AndroidRuntime {
-    static int startReg(JNIEnv* env)  __attribute__((weak));
-};
-} // namespace android
-
-// Main entry point
-extern "C" JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void *) {
-    // Load Android-native jni bindings
-    jni::JNIEnv& env = jni::GetEnv(*vm, jni::jni_version_1_6);
-    android::AndroidRuntime::startReg(&env);
-
-    // Load the main library jni bindings
-    mbgl::Log::Info(mbgl::Event::JNI, "Registering main JNI Methods");
-    mbgl::android::registerNatives(vm);
-
-    // Load the test library jni bindings
-    mbgl::Log::Info(mbgl::Event::JNI, "Registering test JNI Methods");
-
-    jni::RegisterNatives(env, *jni::Class<Main>::Find(env),
-                         jni::MakeNativeMethod<decltype(Main::runAllTests), &Main::runAllTests>("runAllTests"));
-
-    return JNI_VERSION_1_6;
-}

platform/android/src/test/runtime.cpp

@@ -0,0 +1,73 @@
+#include "runtime.hpp"
+#include "../jni.hpp"
+
+#include <cassert>
+#include <dlfcn.h>
+#include <jni.h>
+#include <signal.h>
+#include <string>
+
+// Required for art / libsigchain
+extern "C" JNIEXPORT void EnsureFrontOfChain(int, struct sigaction*) { }
+extern "C" JNIEXPORT void AddSpecialSignalHandlerFn(int, void*) { }
+extern "C" JNIEXPORT void RemoveSpecialSignalHandlerFn(int, bool (*) (int, siginfo_t*, void*)) { }
+
+namespace {
+const std::string kClassPathCommand{"--class_path="};
+const std::string kClassPath{"-Djava.class.path="};
+const std::string kDefaultDex{"/data/local/tmp/core-tests/classes.dex"};
+} // namespace
+
+namespace mbgl {
+namespace android {
+
+bool initRuntime(int argc, char *argv[]) {
+    void* vmHandle = dlopen("libart.so", RTLD_NOW);
+    assert(vmHandle != nullptr);
+
+    using CreateJavaVMFn = jint (*)(JavaVM** vm, JNIEnv** env, void* vmArgs);
+    CreateJavaVMFn createJavaVMFn = reinterpret_cast<CreateJavaVMFn>(dlsym(vmHandle, "JNI_CreateJavaVM"));
+    assert(createJavaVMFn != nullptr);
+
+    std::string classPath = kClassPath + kDefaultDex;
+    for (int i = 0; i < argc; ++i) {
+        const std::string arg{argv[i]};
+        if (arg.compare(0, kClassPathCommand.length(), kClassPathCommand) == 0) {
+            classPath = kClassPath + arg.substr(kClassPathCommand.length());
+            break;
+        }
+    }
+
+    JavaVMOption options[1];
+    options[0].optionString = classPath.c_str();
+
+    JavaVMInitArgs args;
+    args.version = JNI_VERSION_1_6;
+    args.nOptions = 1;
+    args.options = options;
+    args.ignoreUnrecognized = JNI_FALSE;
+
+    JavaVM* vm;
+    JNIEnv* env;
+
+    if (createJavaVMFn(&vm, &env, &args) != JNI_OK) {
+        return false;
+    }
+
+    void* runtimeHandle = dlopen("libandroid_runtime.so", RTLD_NOW);
+    assert(runtimeHandle != nullptr);
+
+    using RegisterNativesFn = jint (*)(JNIEnv* env);
+    RegisterNativesFn registerNativesFn = reinterpret_cast<RegisterNativesFn>(dlsym(runtimeHandle, "registerFrameworkNatives"));
+    assert(registerNativesFn != nullptr);
+
+    if (registerNativesFn(env) != JNI_OK) {
+        return false;
+    }
+
+    mbgl::android::registerNatives(vm);
+    return true;
+}
+
+} // namespace android
+} // namespace mbgl

platform/android/src/test/runtime.hpp

@@ -0,0 +1,9 @@
+#pragma once
+
+namespace mbgl {
+namespace android {
+
+bool initRuntime(int argc, char *argv[]);
+
+} // namespace android
+} // namespace mbgl

platform/android/src/test/test_runner.cpp

@@ -0,0 +1,10 @@
+#include "runtime.hpp"
+#include <mbgl/test.hpp>
+
+int main(int argc, char *argv[]) {
+    if (!mbgl::android::initRuntime(argc, argv)) {
+        return 1;
+    }
+
+    mbgl::runTests(argc, argv);
+}

platform/android/src/test/version-script

@@ -0,0 +1,8 @@
+{
+global:
+  EnsureFrontOfChain;
+  AddSpecialSignalHandlerFn;
+  RemoveSpecialSignalHandlerFn;
+local:
+  *;
+};