GpuService: Add FeatureOverrideParser

Add the class FeatureOverrideParser to GpuService. This class parses
feature_config protobufs and converts the values to FeatureOverrides,
which is used by GraphicsEnv.

Feature overrides are used to toggle ANGLE driver features.

Bug: 372694741
Test: atest gpuservice_unittest
Flag: com.android.graphics.graphicsenv.flags.feature_overrides
Change-Id: I5c27d1f2e9d370b33a1ec350e36833bcb330e8fd
diff --git a/services/gpuservice/Android.bp b/services/gpuservice/Android.bp
index ca9fe5e..689221f 100644
--- a/services/gpuservice/Android.bp
+++ b/services/gpuservice/Android.bp
@@ -19,10 +19,16 @@
     ],
 }
 
+cc_aconfig_library {
+    name: "gpuservice_flags_c_lib",
+    aconfig_declarations: "graphicsenv_flags",
+}
+
 cc_defaults {
     name: "libgpuservice_defaults",
     defaults: [
         "gpuservice_defaults",
+        "libfeatureoverride_deps",
         "libgfxstats_deps",
         "libgpumem_deps",
         "libgpumemtracer_deps",
@@ -40,8 +46,11 @@
         "libgraphicsenv",
         "liblog",
         "libutils",
+        "server_configurable_flags",
     ],
     static_libs: [
+        "gpuservice_flags_c_lib",
+        "libfeatureoverride",
         "libgfxstats",
         "libgpumem",
         "libgpumemtracer",
diff --git a/services/gpuservice/feature_override/Android.bp b/services/gpuservice/feature_override/Android.bp
new file mode 100644
index 0000000..cda67f0
--- /dev/null
+++ b/services/gpuservice/feature_override/Android.bp
@@ -0,0 +1,98 @@
+// Copyright 2024 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_native_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_native_license"],
+}
+
+cc_defaults {
+    name: "libfeatureoverride_deps",
+    include_dirs: [
+        "external/protobuf",
+        "external/protobuf/src",
+    ],
+    header_libs: [
+        "libbase_headers",
+    ],
+    shared_libs: [
+        "libbase",
+        "libgraphicsenv",
+        "liblog",
+    ],
+    static_libs: [
+        "libprotobuf-cpp-lite-ndk",
+    ],
+}
+
+filegroup {
+    name: "feature_config_proto_definitions",
+    srcs: [
+        "proto/feature_config.proto",
+    ],
+}
+
+genrule {
+    name: "feature_config_proto_lite_gen_headers",
+    srcs: [
+        ":feature_config_proto_definitions",
+    ],
+    tools: [
+        "aprotoc",
+    ],
+    cmd: "$(location aprotoc) " +
+        "--proto_path=frameworks/native/services/gpuservice/feature_override " +
+        "--cpp_out=lite=true:$(genDir)/frameworks/native/services/gpuservice/feature_override " +
+        "$(locations :feature_config_proto_definitions)",
+    out: [
+        "frameworks/native/services/gpuservice/feature_override/proto/feature_config.pb.h",
+    ],
+    export_include_dirs: [
+        "frameworks/native/services/gpuservice/feature_override/proto/",
+    ],
+}
+
+cc_library_static {
+    name: "libfeatureoverride",
+    defaults: [
+        "libfeatureoverride_deps",
+    ],
+    srcs: [
+        ":feature_config_proto_definitions",
+        "FeatureOverrideParser.cpp",
+    ],
+    local_include_dirs: [
+        "include",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wimplicit-fallthrough",
+    ],
+    cppflags: [
+        "-Wno-sign-compare",
+    ],
+    export_include_dirs: ["include"],
+    proto: {
+        type: "lite",
+        static: true,
+    },
+    generated_headers: [
+        "feature_config_proto_lite_gen_headers",
+    ],
+}
diff --git a/services/gpuservice/feature_override/FeatureOverrideParser.cpp b/services/gpuservice/feature_override/FeatureOverrideParser.cpp
new file mode 100644
index 0000000..1ad637c
--- /dev/null
+++ b/services/gpuservice/feature_override/FeatureOverrideParser.cpp
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <feature_override/FeatureOverrideParser.h>
+
+#include <chrono>
+#include <fstream>
+#include <sstream>
+#include <string>
+#include <sys/stat.h>
+#include <vector>
+
+#include <graphicsenv/FeatureOverrides.h>
+#include <log/log.h>
+
+#include "feature_config.pb.h"
+
+namespace {
+
+void resetFeatureOverrides(android::FeatureOverrides &featureOverrides) {
+    featureOverrides.mGlobalFeatures.clear();
+    featureOverrides.mPackageFeatures.clear();
+}
+
+void initFeatureConfig(android::FeatureConfig &featureConfig,
+                       const feature_override::FeatureConfig &featureConfigProto) {
+    featureConfig.mFeatureName = featureConfigProto.feature_name();
+    featureConfig.mEnabled = featureConfigProto.enabled();
+}
+
+feature_override::FeatureOverrideProtos readFeatureConfigProtos(std::string configFilePath) {
+    feature_override::FeatureOverrideProtos overridesProtos;
+
+    std::ifstream protobufBinaryFile(configFilePath.c_str());
+    if (protobufBinaryFile.fail()) {
+        ALOGE("Failed to open feature config file: `%s`.", configFilePath.c_str());
+        return overridesProtos;
+    }
+
+    std::stringstream buffer;
+    buffer << protobufBinaryFile.rdbuf();
+    std::string serializedConfig = buffer.str();
+    std::vector<uint8_t> serialized(
+            reinterpret_cast<const uint8_t *>(serializedConfig.data()),
+            reinterpret_cast<const uint8_t *>(serializedConfig.data()) +
+            serializedConfig.size());
+
+    if (!overridesProtos.ParseFromArray(serialized.data(),
+                                        static_cast<int>(serialized.size()))) {
+        ALOGE("Failed to parse GpuConfig protobuf data.");
+    }
+
+    return overridesProtos;
+}
+
+} // namespace
+
+namespace android {
+
+std::string FeatureOverrideParser::getFeatureOverrideFilePath() const {
+    const std::string kConfigFilePath = "/system/etc/angle/feature_config_vk.binarypb";
+
+    return kConfigFilePath;
+}
+
+bool FeatureOverrideParser::shouldReloadFeatureOverrides() const {
+    std::string configFilePath = getFeatureOverrideFilePath();
+    struct stat fileStat{};
+    if (stat(getFeatureOverrideFilePath().c_str(), &fileStat) != 0) {
+        ALOGE("Error getting file information for '%s': %s", getFeatureOverrideFilePath().c_str(),
+              strerror(errno));
+        // stat'ing the file failed, so return false since reading it will also likely fail.
+        return false;
+    }
+
+    return fileStat.st_mtime > mLastProtobufReadTime;
+}
+
+void FeatureOverrideParser::forceFileRead() {
+    resetFeatureOverrides(mFeatureOverrides);
+    mLastProtobufReadTime = 0;
+}
+
+void FeatureOverrideParser::parseFeatureOverrides() {
+    const feature_override::FeatureOverrideProtos overridesProtos = readFeatureConfigProtos(
+            getFeatureOverrideFilePath());
+
+    // Global feature overrides.
+    for (const auto &featureConfigProto: overridesProtos.global_features()) {
+        FeatureConfig featureConfig;
+        initFeatureConfig(featureConfig, featureConfigProto);
+
+        mFeatureOverrides.mGlobalFeatures.emplace_back(featureConfig);
+    }
+
+    // App-specific feature overrides.
+    for (auto const &pkgConfigProto: overridesProtos.package_features()) {
+        const std::string &packageName = pkgConfigProto.package_name();
+
+        if (mFeatureOverrides.mPackageFeatures.count(packageName)) {
+            ALOGE("Package already has feature overrides! Skipping.");
+            continue;
+        }
+
+        std::vector<FeatureConfig> featureConfigs;
+        for (const auto &featureConfigProto: pkgConfigProto.feature_configs()) {
+            FeatureConfig featureConfig;
+            initFeatureConfig(featureConfig, featureConfigProto);
+
+            featureConfigs.emplace_back(featureConfig);
+        }
+
+        mFeatureOverrides.mPackageFeatures[packageName] = featureConfigs;
+    }
+
+    mLastProtobufReadTime = std::chrono::system_clock::to_time_t(
+            std::chrono::system_clock::now());
+}
+
+FeatureOverrides FeatureOverrideParser::getFeatureOverrides() {
+    if (shouldReloadFeatureOverrides()) {
+        parseFeatureOverrides();
+    }
+
+    return mFeatureOverrides;
+}
+
+} // namespace android
diff --git a/services/gpuservice/feature_override/include/feature_override/FeatureOverrideParser.h b/services/gpuservice/feature_override/include/feature_override/FeatureOverrideParser.h
new file mode 100644
index 0000000..b1f1867
--- /dev/null
+++ b/services/gpuservice/feature_override/include/feature_override/FeatureOverrideParser.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FEATURE_OVERRIDE_PARSER_H_
+#define FEATURE_OVERRIDE_PARSER_H_
+
+#include <ctime>
+#include <string>
+#include <vector>
+
+#include <graphicsenv/FeatureOverrides.h>
+
+namespace android {
+
+class FeatureOverrideParser {
+public:
+    FeatureOverrideParser() = default;
+    FeatureOverrideParser(const FeatureOverrideParser &) = default;
+    virtual ~FeatureOverrideParser() = default;
+
+    FeatureOverrides getFeatureOverrides();
+    void forceFileRead();
+
+private:
+    bool shouldReloadFeatureOverrides() const;
+    void parseFeatureOverrides();
+    // Allow FeatureOverrideParserMock to override with the unit test file's path.
+    virtual std::string getFeatureOverrideFilePath() const;
+
+    std::time_t mLastProtobufReadTime = 0;
+    FeatureOverrides mFeatureOverrides;
+};
+
+} // namespace android
+
+#endif  // FEATURE_OVERRIDE_PARSER_H_
diff --git a/services/gpuservice/feature_override/proto/feature_config.proto b/services/gpuservice/feature_override/proto/feature_config.proto
new file mode 100644
index 0000000..4d4bf28
--- /dev/null
+++ b/services/gpuservice/feature_override/proto/feature_config.proto
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto3";
+
+package feature_override;
+
+option optimize_for = LITE_RUNTIME;
+
+/**
+ * Feature Configuration
+ * feature_name: Feature name (see external/angle/include/platform/autogen/FeaturesVk_autogen.h).
+ * enabled: Either enable or disable the feature.
+ */
+message FeatureConfig
+{
+    string feature_name         = 1;
+    bool enabled                = 2;
+}
+
+/**
+ * Package Configuration
+ * feature_configs: List of features configs for the package.
+ */
+message PackageConfig
+{
+    string package_name                    = 1;
+    repeated FeatureConfig feature_configs = 2;
+}
+
+/**
+ * Feature Overrides
+ * global_features: Features to apply globally, for every package.
+ * package_features: Features to apply for individual packages.
+ */
+message FeatureOverrideProtos
+{
+    repeated FeatureConfig global_features  = 1;
+    repeated PackageConfig package_features = 2;
+}
diff --git a/services/gpuservice/include/gpuservice/GpuService.h b/services/gpuservice/include/gpuservice/GpuService.h
index 3072885..057d127 100644
--- a/services/gpuservice/include/gpuservice/GpuService.h
+++ b/services/gpuservice/include/gpuservice/GpuService.h
@@ -19,6 +19,7 @@
 
 #include <binder/IInterface.h>
 #include <cutils/compiler.h>
+#include <feature_override/FeatureOverrideParser.h>
 #include <graphicsenv/GpuStatsInfo.h>
 #include <graphicsenv/IGpuService.h>
 #include <serviceutils/PriorityDumper.h>
@@ -96,6 +97,7 @@
     std::string mDeveloperDriverPath;
     std::unique_ptr<std::thread> mGpuMemAsyncInitThread;
     std::unique_ptr<std::thread> mGpuWorkAsyncInitThread;
+    FeatureOverrideParser mFeatureOverrideParser;
 };
 
 } // namespace android
diff --git a/services/gpuservice/tests/unittests/Android.bp b/services/gpuservice/tests/unittests/Android.bp
index 8056a2c..d2184d8 100644
--- a/services/gpuservice/tests/unittests/Android.bp
+++ b/services/gpuservice/tests/unittests/Android.bp
@@ -21,17 +21,71 @@
     default_applicable_licenses: ["frameworks_native_license"],
 }
 
+cc_aconfig_library {
+    name: "gpuservice_unittest_flags_c_lib",
+    aconfig_declarations: "graphicsenv_flags",
+}
+
+genrule_defaults {
+    name: "gpuservice_unittest_feature_config_pb_defaults",
+    tools: ["aprotoc"],
+    tool_files: [
+        ":feature_config_proto_definitions",
+    ],
+    cmd: "$(location aprotoc) " +
+        "--encode=feature_override.FeatureOverrideProtos " +
+        "$(locations :feature_config_proto_definitions) " +
+        "< $(in) " +
+        "> $(out) ",
+}
+
+// Main protobuf used by the unit tests.
+filegroup {
+    name: "gpuservice_unittest_feature_config_vk_prototext",
+    srcs: [
+        "data/feature_config_test.txtpb",
+    ],
+}
+
+genrule {
+    name: "gpuservice_unittest_feature_config_vk_binarypb",
+    defaults: ["gpuservice_unittest_feature_config_pb_defaults"],
+    srcs: [
+        ":gpuservice_unittest_feature_config_vk_prototext",
+    ],
+    out: ["gpuservice_unittest_feature_config_vk.binarypb"],
+}
+
+// "Updated" protobuf, used to validate forceFileRead().
+filegroup {
+    name: "gpuservice_unittest_feature_config_vk_force_read_prototext",
+    srcs: [
+        "data/feature_config_test_force_read.txtpb",
+    ],
+}
+
+genrule {
+    name: "gpuservice_unittest_feature_config_vk_force_read_binarypb",
+    defaults: ["gpuservice_unittest_feature_config_pb_defaults"],
+    srcs: [
+        ":gpuservice_unittest_feature_config_vk_force_read_prototext",
+    ],
+    out: ["gpuservice_unittest_feature_config_vk_force_read.binarypb"],
+}
+
 cc_test {
     name: "gpuservice_unittest",
     test_suites: ["device-tests"],
     defaults: [
+        "aconfig_lib_cc_static_link.defaults",
         "libgpuservice_defaults",
     ],
     srcs: [
+        "FeatureOverrideParserTest.cpp",
         "GpuMemTest.cpp",
         "GpuMemTracerTest.cpp",
-        "GpuStatsTest.cpp",
         "GpuServiceTest.cpp",
+        "GpuStatsTest.cpp",
     ],
     header_libs: ["bpf_headers"],
     shared_libs: [
@@ -48,10 +102,15 @@
         "libutils",
     ],
     static_libs: [
+        "gpuservice_unittest_flags_c_lib",
         "libgmock",
         "libgpuservice",
         "libperfetto_client_experimental",
         "perfetto_trace_protos",
     ],
+    data: [
+        ":gpuservice_unittest_feature_config_vk_binarypb",
+        ":gpuservice_unittest_feature_config_vk_force_read_binarypb",
+    ],
     require_root: true,
 }
diff --git a/services/gpuservice/tests/unittests/FeatureOverrideParserTest.cpp b/services/gpuservice/tests/unittests/FeatureOverrideParserTest.cpp
new file mode 100644
index 0000000..65a1b58
--- /dev/null
+++ b/services/gpuservice/tests/unittests/FeatureOverrideParserTest.cpp
@@ -0,0 +1,218 @@
+/*
+ * Copyright 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "gpuservice_unittest"
+
+#include <android-base/file.h>
+#include <log/log.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#include <com_android_graphics_graphicsenv_flags.h>
+#include <feature_override/FeatureOverrideParser.h>
+
+using ::testing::AtLeast;
+using ::testing::Return;
+
+namespace android {
+namespace {
+
+std::string getTestBinarypbPath(const std::string &filename) {
+    std::string path = android::base::GetExecutableDirectory();
+    path.append("/");
+    path.append(filename);
+
+    return path;
+}
+
+class FeatureOverrideParserMock : public FeatureOverrideParser {
+public:
+    MOCK_METHOD(std::string, getFeatureOverrideFilePath, (), (const, override));
+};
+
+class FeatureOverrideParserTest : public testing::Test {
+public:
+    FeatureOverrideParserTest() {
+        const ::testing::TestInfo *const test_info =
+                ::testing::UnitTest::GetInstance()->current_test_info();
+        ALOGD("**** Setting up for %s.%s\n", test_info->test_case_name(), test_info->name());
+    }
+
+    ~FeatureOverrideParserTest() {
+        const ::testing::TestInfo *const test_info =
+                ::testing::UnitTest::GetInstance()->current_test_info();
+        ALOGD("**** Tearing down after %s.%s\n", test_info->test_case_name(),
+              test_info->name());
+    }
+
+    void SetUp() override {
+        const std::string filename = "gpuservice_unittest_feature_config_vk.binarypb";
+
+        EXPECT_CALL(mFeatureOverrideParser, getFeatureOverrideFilePath())
+            .WillRepeatedly(Return(getTestBinarypbPath(filename)));
+    }
+
+    FeatureOverrideParserMock mFeatureOverrideParser;
+};
+
+testing::AssertionResult validateFeatureConfigTestTxtpbSizes(FeatureOverrides overrides) {
+    size_t expectedGlobalFeaturesSize = 1;
+    if (overrides.mGlobalFeatures.size() != expectedGlobalFeaturesSize) {
+        return testing::AssertionFailure()
+                << "overrides.mGlobalFeatures.size(): " << overrides.mGlobalFeatures.size()
+                << ", expected: " << expectedGlobalFeaturesSize;
+    }
+
+    size_t expectedPackageFeaturesSize = 1;
+    if (overrides.mPackageFeatures.size() != expectedPackageFeaturesSize) {
+        return testing::AssertionFailure()
+                << "overrides.mPackageFeatures.size(): " << overrides.mPackageFeatures.size()
+                << ", expected: " << expectedPackageFeaturesSize;
+    }
+
+    return testing::AssertionSuccess();
+}
+
+testing::AssertionResult validateFeatureConfigTestForceReadTxtpbSizes(FeatureOverrides overrides) {
+    size_t expectedGlobalFeaturesSize = 1;
+    if (overrides.mGlobalFeatures.size() != expectedGlobalFeaturesSize) {
+        return testing::AssertionFailure()
+                << "overrides.mGlobalFeatures.size(): " << overrides.mGlobalFeatures.size()
+                << ", expected: " << expectedGlobalFeaturesSize;
+    }
+
+    size_t expectedPackageFeaturesSize = 0;
+    if (overrides.mPackageFeatures.size() != expectedPackageFeaturesSize) {
+        return testing::AssertionFailure()
+                << "overrides.mPackageFeatures.size(): " << overrides.mPackageFeatures.size()
+                << ", expected: " << expectedPackageFeaturesSize;
+    }
+
+    return testing::AssertionSuccess();
+}
+
+testing::AssertionResult validateGlobalOverrides1(FeatureOverrides overrides) {
+    const int kTestFeatureIndex = 0;
+    const std::string expectedFeatureName = "globalOverrides1";
+    const FeatureConfig &cfg = overrides.mGlobalFeatures[kTestFeatureIndex];
+
+    if (cfg.mFeatureName != expectedFeatureName) {
+        return testing::AssertionFailure()
+                << "cfg.mFeatureName: " << cfg.mFeatureName
+                << ", expected: " << expectedFeatureName;
+    }
+
+    bool expectedEnabled = false;
+    if (cfg.mEnabled != expectedEnabled) {
+        return testing::AssertionFailure()
+                << "cfg.mEnabled: " << cfg.mEnabled
+                << ", expected: " << expectedEnabled;
+    }
+
+    return testing::AssertionSuccess();
+}
+
+TEST_F(FeatureOverrideParserTest, globalOverrides1) {
+    FeatureOverrides overrides = mFeatureOverrideParser.getFeatureOverrides();
+
+    EXPECT_TRUE(validateFeatureConfigTestTxtpbSizes(overrides));
+    EXPECT_TRUE(validateGlobalOverrides1(overrides));
+}
+
+testing::AssertionResult validatePackageOverrides1(FeatureOverrides overrides) {
+    const std::string expectedTestPackageName = "com.gpuservice_unittest.packageOverrides1";
+
+    if (!overrides.mPackageFeatures.count(expectedTestPackageName)) {
+        return testing::AssertionFailure()
+                << "overrides.mPackageFeatures missing expected package: "
+                << expectedTestPackageName;
+    }
+
+    const std::vector<FeatureConfig>& features =
+            overrides.mPackageFeatures[expectedTestPackageName];
+
+    size_t expectedFeaturesSize = 1;
+    if (features.size() != expectedFeaturesSize) {
+        return testing::AssertionFailure()
+                << "features.size(): " << features.size()
+                << ", expectedFeaturesSize: " << expectedFeaturesSize;
+    }
+
+    const std::string expectedFeatureName = "packageOverrides1";
+    const FeatureConfig &cfg = features[0];
+
+    bool expectedEnabled = true;
+    if (cfg.mEnabled != expectedEnabled) {
+        return testing::AssertionFailure()
+                << "cfg.mEnabled: " << cfg.mEnabled
+                << ", expected: " << expectedEnabled;
+    }
+
+    return testing::AssertionSuccess();
+}
+
+TEST_F(FeatureOverrideParserTest, packageOverrides1) {
+    FeatureOverrides overrides = mFeatureOverrideParser.getFeatureOverrides();
+
+    EXPECT_TRUE(validateFeatureConfigTestTxtpbSizes(overrides));
+    EXPECT_TRUE(validatePackageOverrides1(overrides));
+}
+
+testing::AssertionResult validateForceFileRead(FeatureOverrides overrides) {
+    const int kTestFeatureIndex = 0;
+    const std::string expectedFeatureName = "forceFileRead";
+
+    const FeatureConfig &cfg = overrides.mGlobalFeatures[kTestFeatureIndex];
+    if (cfg.mFeatureName != expectedFeatureName) {
+        return testing::AssertionFailure()
+                << "cfg.mFeatureName: " << cfg.mFeatureName
+                << ", expected: " << expectedFeatureName;
+    }
+
+    bool expectedEnabled = false;
+    if (cfg.mEnabled != expectedEnabled) {
+        return testing::AssertionFailure()
+                << "cfg.mEnabled: " << cfg.mEnabled
+                << ", expected: " << expectedEnabled;
+    }
+
+    return testing::AssertionSuccess();
+}
+
+TEST_F(FeatureOverrideParserTest, forceFileRead) {
+    FeatureOverrides overrides = mFeatureOverrideParser.getFeatureOverrides();
+
+    // Validate the "original" contents are present.
+    EXPECT_TRUE(validateFeatureConfigTestTxtpbSizes(overrides));
+    EXPECT_TRUE(validateGlobalOverrides1(overrides));
+
+    // "Update" the config file.
+    const std::string filename = "gpuservice_unittest_feature_config_vk_force_read.binarypb";
+    EXPECT_CALL(mFeatureOverrideParser, getFeatureOverrideFilePath())
+        .WillRepeatedly(Return(getTestBinarypbPath(filename)));
+
+    mFeatureOverrideParser.forceFileRead();
+
+    overrides = mFeatureOverrideParser.getFeatureOverrides();
+
+    // Validate the new file contents were read and parsed.
+    EXPECT_TRUE(validateFeatureConfigTestForceReadTxtpbSizes(overrides));
+    EXPECT_TRUE(validateForceFileRead(overrides));
+}
+
+} // namespace
+} // namespace android
diff --git a/services/gpuservice/tests/unittests/data/feature_config_test.txtpb b/services/gpuservice/tests/unittests/data/feature_config_test.txtpb
new file mode 100644
index 0000000..726779e
--- /dev/null
+++ b/services/gpuservice/tests/unittests/data/feature_config_test.txtpb
@@ -0,0 +1,40 @@
+# Copyright (C) 2024 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Feature Configuration Test Data
+#
+# proto-file: services/gpuservice/feature_override/proto/feature_config.proto
+# proto-message: FeatureOverrideProtos
+
+# The 'feature_name' entries correspond to the FeatureOverrideParserTest() unit test name.
+global_features [
+    {
+        feature_name: "globalOverrides1"
+        enabled: False
+    }
+]
+
+# The 'package_name' and 'feature_name' entries correspond to the
+# FeatureOverrideParserTest() unit test name.
+package_features [
+    {
+        package_name: "com.gpuservice_unittest.packageOverrides1"
+        feature_configs: [
+            {
+                feature_name: "packageOverrides1"
+                enabled: True
+            }
+        ]
+    }
+]
diff --git a/services/gpuservice/tests/unittests/data/feature_config_test_force_read.txtpb b/services/gpuservice/tests/unittests/data/feature_config_test_force_read.txtpb
new file mode 100644
index 0000000..cf6a67e
--- /dev/null
+++ b/services/gpuservice/tests/unittests/data/feature_config_test_force_read.txtpb
@@ -0,0 +1,26 @@
+# Copyright (C) 2024 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Feature Configuration Test Data
+#
+# proto-file: services/gpuservice/feature_override/proto/feature_config.proto
+# proto-message: FeatureOverrideProtos
+
+# The 'feature_name' entries correspond to the FeatureOverrideParserTest() unit test name.
+global_features [
+    {
+        feature_name: "forceFileRead"
+        enabled: False
+    }
+]