Merge changes from topic "move_conn_lib"

* changes:
  Move VehicleHalProto out from vhal_v2_0.
  Support set property in dump.
  Support debug dump
  Prevent log spam.
  Optimize some code path to move instead of copy data.
diff --git a/automotive/vehicle/2.0/default/impl/vhal_v2_0/proto/VehicleHalProto.proto b/automotive/vehicle/2.0/default/impl/vhal_v2_0/proto/VehicleHalProto.proto
deleted file mode 100644
index 58daca6..0000000
--- a/automotive/vehicle/2.0/default/impl/vhal_v2_0/proto/VehicleHalProto.proto
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * Copyright (C) 2015 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 = "proto2";
-
-package vhal_proto;
-
-// CMD messages are from workstation --> VHAL
-// RESP messages are from VHAL --> workstation
-enum MsgType {
-    GET_CONFIG_CMD                      = 0;
-    GET_CONFIG_RESP                     = 1;
-    GET_CONFIG_ALL_CMD                  = 2;
-    GET_CONFIG_ALL_RESP                 = 3;
-    GET_PROPERTY_CMD                    = 4;
-    GET_PROPERTY_RESP                   = 5;
-    GET_PROPERTY_ALL_CMD                = 6;
-    GET_PROPERTY_ALL_RESP               = 7;
-    SET_PROPERTY_CMD                    = 8;
-    SET_PROPERTY_RESP                   = 9;
-    SET_PROPERTY_ASYNC                  = 10;
-    DEBUG_CMD                           = 11;
-    DEBUG_RESP                          = 12;
-}
-enum Status {
-    RESULT_OK                           = 0;
-    ERROR_UNKNOWN                       = 1;
-    ERROR_UNIMPLEMENTED_CMD             = 2;
-    ERROR_INVALID_PROPERTY              = 3;
-    ERROR_INVALID_AREA_ID               = 4;
-    ERROR_PROPERTY_UNINITIALIZED        = 5;
-    ERROR_WRITE_ONLY_PROPERTY           = 6;
-    ERROR_MEMORY_ALLOC_FAILED           = 7;
-    ERROR_INVALID_OPERATION             = 8;
-}
-
-enum VehiclePropStatus {
-    AVAILABLE                           = 0;
-    UNAVAILABLE                         = 1;
-    ERROR                               = 2;
-}
-
-message VehicleAreaConfig {
-    required int32  area_id             = 1;
-    optional sint32 min_int32_value     = 2;
-    optional sint32 max_int32_value     = 3;
-    optional sint64 min_int64_value     = 4;
-    optional sint64 max_int64_value     = 5;
-    optional float  min_float_value     = 6;
-    optional float  max_float_value     = 7;
-}
-
-message VehiclePropConfig {
-    required int32             prop                = 1;
-    optional int32             access              = 2;
-    optional int32             change_mode         = 3;
-    optional int32             value_type          = 4;
-    optional int32             supported_areas     = 5;     // Deprecated - DO NOT USE
-    repeated VehicleAreaConfig area_configs        = 6;
-    optional int32             config_flags        = 7;
-    repeated int32             config_array        = 8;
-    optional string            config_string       = 9;
-    optional float             min_sample_rate     = 10;
-    optional float             max_sample_rate     = 11;
-};
-
-message VehiclePropValue {
-    // common data
-    required int32  prop                = 1;
-    optional int32  value_type          = 2;
-    optional int64  timestamp           = 3;    // required for valid data from HAL, skipped for set
-    optional VehiclePropStatus  status  = 10;   // required for valid data from HAL, skipped for set
-
-    // values
-    optional int32  area_id             = 4;
-    repeated sint32 int32_values        = 5;    // this also covers boolean value.
-    repeated sint64 int64_values        = 6;
-    repeated float  float_values        = 7;
-    optional string string_value        = 8;
-    optional bytes  bytes_value         = 9;
-};
-
-// This structure is used to notify what values to get from the Vehicle HAL
-message VehiclePropGet {
-    required int32 prop                 = 1;
-    optional int32 area_id              = 2;
-};
-
-message EmulatorMessage {
-    required MsgType           msg_type       = 1;
-    optional Status            status         = 2; // Only for RESP messages
-    repeated VehiclePropGet    prop           = 3; // Provided for getConfig, getProperty commands
-    repeated VehiclePropConfig config         = 4;
-    repeated VehiclePropValue  value          = 5;
-    repeated string            debug_commands = 6; // Required for debug command
-    optional string            debug_result   = 7; // Required for debug RESP messages
-};
diff --git a/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h b/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
index cab184b..1c45271 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
@@ -23,7 +23,9 @@
 #include <IVehicleHardware.h>
 #include <VehicleHalTypes.h>
 #include <VehiclePropertyStore.h>
+#include <android-base/parseint.h>
 #include <android-base/result.h>
+#include <android-base/stringprintf.h>
 #include <android-base/thread_annotations.h>
 
 #include <map>
@@ -37,7 +39,7 @@
 namespace vehicle {
 namespace fake {
 
-class FakeVehicleHardware final : public IVehicleHardware {
+class FakeVehicleHardware : public IVehicleHardware {
   public:
     FakeVehicleHardware();
 
@@ -78,13 +80,15 @@
     void registerOnPropertySetErrorEvent(
             std::unique_ptr<const PropertySetErrorCallback> callback) override;
 
+  protected:
+    // mValuePool is also used in mServerSidePropStore.
+    const std::shared_ptr<VehiclePropValuePool> mValuePool;
+    const std::shared_ptr<VehiclePropertyStore> mServerSidePropStore;
+
   private:
     // Expose private methods to unit test.
     friend class FakeVehicleHardwareTestHelper;
 
-    // mValuePool is also used in mServerSidePropStore.
-    const std::shared_ptr<VehiclePropValuePool> mValuePool;
-    const std::shared_ptr<VehiclePropertyStore> mServerSidePropStore;
     const std::unique_ptr<obd2frame::FakeObd2Frame> mFakeObd2Frame;
     const std::unique_ptr<FakeUserHal> mFakeUserHal;
     std::mutex mCallbackLock;
@@ -120,6 +124,35 @@
     ::android::base::Result<VehiclePropValuePool::RecyclableType> getUserHalProp(
             const ::aidl::android::hardware::automotive::vehicle::VehiclePropValue& value) const;
     bool isHvacPropAndHvacNotAvailable(int32_t propId);
+
+    std::string dumpAllProperties();
+    std::string dumpOnePropertyByConfig(
+            int rowNumber,
+            const ::aidl::android::hardware::automotive::vehicle::VehiclePropConfig& config);
+    std::string dumpOnePropertyById(int32_t propId, int32_t areaId);
+    std::string dumpHelp();
+    std::string dumpListProperties();
+    std::string dumpSpecificProperty(const std::vector<std::string>& options);
+    std::string dumpSetProperties(const std::vector<std::string>& options);
+
+    template <typename T>
+    ::android::base::Result<T> safelyParseInt(int index, const std::string& s) {
+        T out;
+        if (!::android::base::ParseInt(s, &out)) {
+            return ::android::base::Error() << ::android::base::StringPrintf(
+                           "non-integer argument at index %d: %s\n", index, s.c_str());
+        }
+        return out;
+    }
+    ::android::base::Result<float> safelyParseFloat(int index, const std::string& s);
+    std::vector<std::string> getOptionValues(const std::vector<std::string>& options,
+                                             size_t* index);
+    ::android::base::Result<::aidl::android::hardware::automotive::vehicle::VehiclePropValue>
+    parseSetPropOptions(const std::vector<std::string>& options);
+    ::android::base::Result<std::vector<uint8_t>> parseHexString(const std::string& s);
+
+    ::android::base::Result<void> checkArgumentsSize(const std::vector<std::string>& options,
+                                                     size_t minSize);
 };
 
 }  // namespace fake
diff --git a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
index e75f0e7..9660793 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
@@ -14,6 +14,9 @@
  * limitations under the License.
  */
 
+#define LOG_TAG "FakeVehicleHardware"
+#define FAKE_VEHICLEHARDWARE_DEBUG false  // STOPSHIP if true.
+
 #include "FakeVehicleHardware.h"
 
 #include <DefaultConfig.h>
@@ -22,7 +25,9 @@
 #include <PropertyUtils.h>
 #include <VehicleHalTypes.h>
 #include <VehicleUtils.h>
+#include <android-base/parsedouble.h>
 #include <android-base/properties.h>
+#include <android-base/strings.h>
 #include <utils/Log.h>
 #include <utils/SystemClock.h>
 
@@ -56,12 +61,31 @@
 using ::aidl::android::hardware::automotive::vehicle::VehiclePropertyType;
 using ::aidl::android::hardware::automotive::vehicle::VehiclePropValue;
 
+using ::android::base::EqualsIgnoreCase;
 using ::android::base::Error;
+using ::android::base::ParseFloat;
 using ::android::base::Result;
+using ::android::base::StartsWith;
+using ::android::base::StringPrintf;
 
 const char* VENDOR_OVERRIDE_DIR = "/vendor/etc/automotive/vhaloverride/";
 const char* OVERRIDE_PROPERTY = "persist.vendor.vhal_init_value_override";
 
+// A list of supported options for "--set" command.
+const std::unordered_set<std::string> SET_PROP_OPTIONS = {
+        // integer.
+        "-i",
+        // 64bit integer.
+        "-i64",
+        // float.
+        "-f",
+        // string.
+        "-s",
+        // bytes in hex format, e.g. 0xDEADBEEF.
+        "-b",
+        // Area id in integer.
+        "-a"};
+
 }  // namespace
 
 void FakeVehicleHardware::storePropInitialValue(const defaultconfig::ConfigDeclaration& config) {
@@ -387,7 +411,9 @@
         const VehiclePropValue& value = request.value;
         int propId = value.prop;
 
-        ALOGD("Set value for property ID: %d", propId);
+        if (FAKE_VEHICLEHARDWARE_DEBUG) {
+            ALOGD("Set value for property ID: %d", propId);
+        }
 
         SetValueResult setValueResult;
         setValueResult.requestId = request.requestId;
@@ -434,7 +460,10 @@
     std::vector<GetValueResult> results;
     for (auto& request : requests) {
         const VehiclePropValue& value = request.prop;
-        ALOGD("getValues(%d)", value.prop);
+
+        if (FAKE_VEHICLEHARDWARE_DEBUG) {
+            ALOGD("getValues(%d)", value.prop);
+        }
 
         GetValueResult getValueResult;
         getValueResult.requestId = request.requestId;
@@ -476,14 +505,290 @@
     return StatusCode::OK;
 }
 
-DumpResult FakeVehicleHardware::dump(const std::vector<std::string>&) {
+DumpResult FakeVehicleHardware::dump(const std::vector<std::string>& options) {
     DumpResult result;
-    // TODO(b/201830716): Implement this.
+    result.callerShouldDumpState = false;
+    if (options.size() == 0) {
+        // We only want caller to dump default state when there is no options.
+        result.callerShouldDumpState = true;
+        result.buffer = dumpAllProperties();
+        return result;
+    }
+    std::string option = options[0];
+    if (EqualsIgnoreCase(option, "--help")) {
+        result.buffer = dumpHelp();
+        return result;
+    } else if (EqualsIgnoreCase(option, "--list")) {
+        result.buffer = dumpListProperties();
+    } else if (EqualsIgnoreCase(option, "--get")) {
+        result.buffer = dumpSpecificProperty(options);
+    } else if (EqualsIgnoreCase(option, "--set")) {
+        result.buffer = dumpSetProperties(options);
+    } else {
+        result.buffer = StringPrintf("Invalid option: %s\n", option.c_str());
+    }
     return result;
 }
 
+std::string FakeVehicleHardware::dumpHelp() {
+    return "Usage: \n\n"
+           "[no args]: dumps (id and value) all supported properties \n"
+           "--help: shows this help\n"
+           "--list: lists the ids of all supported properties\n"
+           "--get <PROP1> [PROP2] [PROPN]: dumps the value of specific properties \n"
+           "--set <PROP> [-i INT_VALUE [INT_VALUE ...]] [-i64 INT64_VALUE [INT64_VALUE ...]] "
+           "[-f FLOAT_VALUE [FLOAT_VALUE ...]] [-s STR_VALUE] "
+           "[-b BYTES_VALUE] [-a AREA_ID] : sets the value of property PROP. "
+           "Notice that the string, bytes and area value can be set just once, while the other can"
+           " have multiple values (so they're used in the respective array), "
+           "BYTES_VALUE is in the form of 0xXXXX, e.g. 0xdeadbeef.\n";
+}
+
+std::string FakeVehicleHardware::dumpAllProperties() {
+    auto configs = mServerSidePropStore->getAllConfigs();
+    if (configs.size() == 0) {
+        return "no properties to dump\n";
+    }
+    std::string msg = StringPrintf("dumping %zu properties\n", configs.size());
+    int rowNumber = 1;
+    for (const VehiclePropConfig& config : configs) {
+        msg += dumpOnePropertyByConfig(rowNumber++, config);
+    }
+    return msg;
+}
+
+std::string FakeVehicleHardware::dumpOnePropertyByConfig(int rowNumber,
+                                                         const VehiclePropConfig& config) {
+    size_t numberAreas = config.areaConfigs.size();
+    std::string msg = "";
+    if (numberAreas == 0) {
+        msg += StringPrintf("%d: ", rowNumber);
+        msg += dumpOnePropertyById(config.prop, /* areaId= */ 0);
+        return msg;
+    }
+    for (size_t j = 0; j < numberAreas; ++j) {
+        if (numberAreas > 1) {
+            msg += StringPrintf("%d-%zu: ", rowNumber, j);
+        } else {
+            msg += StringPrintf("%d: ", rowNumber);
+        }
+        msg += dumpOnePropertyById(config.prop, config.areaConfigs[j].areaId);
+    }
+    return msg;
+}
+
+std::string FakeVehicleHardware::dumpOnePropertyById(int32_t propId, int32_t areaId) {
+    VehiclePropValue value = {
+            .prop = propId,
+            .areaId = areaId,
+    };
+    bool isSpecialValue = false;
+    auto result = maybeGetSpecialValue(value, &isSpecialValue);
+    if (!isSpecialValue) {
+        result = mServerSidePropStore->readValue(value);
+    }
+    if (!result.ok()) {
+        return StringPrintf("failed to read property value: %d, error: %s, code: %d\n", propId,
+                            getErrorMsg(result).c_str(), getIntErrorCode(result));
+
+    } else {
+        return result.value()->toString() + "\n";
+    }
+}
+
+std::string FakeVehicleHardware::dumpListProperties() {
+    auto configs = mServerSidePropStore->getAllConfigs();
+    if (configs.size() == 0) {
+        return "no properties to list\n";
+    }
+    int rowNumber = 1;
+    std::string msg = StringPrintf("listing %zu properties\n", configs.size());
+    for (const auto& config : configs) {
+        msg += StringPrintf("%d: %d\n", rowNumber++, config.prop);
+    }
+    return msg;
+}
+
+Result<void> FakeVehicleHardware::checkArgumentsSize(const std::vector<std::string>& options,
+                                                     size_t minSize) {
+    size_t size = options.size();
+    if (size >= minSize) {
+        return {};
+    }
+    return Error() << StringPrintf("Invalid number of arguments: required at least %zu, got %zu\n",
+                                   minSize, size);
+}
+
+std::string FakeVehicleHardware::dumpSpecificProperty(const std::vector<std::string>& options) {
+    if (auto result = checkArgumentsSize(options, /*minSize=*/2); !result.ok()) {
+        return getErrorMsg(result);
+    }
+
+    // options[0] is the command itself...
+    int rowNumber = 1;
+    size_t size = options.size();
+    std::string msg = "";
+    for (size_t i = 1; i < size; ++i) {
+        auto propResult = safelyParseInt<int32_t>(i, options[i]);
+        if (!propResult.ok()) {
+            msg += getErrorMsg(propResult);
+            continue;
+        }
+        int32_t prop = propResult.value();
+        auto result = mServerSidePropStore->getConfig(prop);
+        if (!result.ok()) {
+            msg += StringPrintf("No property %d\n", prop);
+            continue;
+        }
+        msg += dumpOnePropertyByConfig(rowNumber++, *result.value());
+    }
+    return msg;
+}
+
+std::vector<std::string> FakeVehicleHardware::getOptionValues(
+        const std::vector<std::string>& options, size_t* index) {
+    std::vector<std::string> values;
+    while (*index < options.size()) {
+        std::string option = options[*index];
+        if (SET_PROP_OPTIONS.find(option) != SET_PROP_OPTIONS.end()) {
+            return std::move(values);
+        }
+        values.push_back(option);
+        (*index)++;
+    }
+    return std::move(values);
+}
+
+Result<VehiclePropValue> FakeVehicleHardware::parseSetPropOptions(
+        const std::vector<std::string>& options) {
+    // Options format:
+    // --set PROP [-f f1 f2...] [-i i1 i2...] [-i64 i1 i2...] [-s s1 s2...] [-b b1 b2...] [-a a]
+    size_t optionIndex = 1;
+    auto result = safelyParseInt<int32_t>(optionIndex, options[optionIndex]);
+    if (!result.ok()) {
+        return Error() << StringPrintf("Property value: \"%s\" is not a valid int: %s\n",
+                                       options[optionIndex].c_str(), getErrorMsg(result).c_str());
+    }
+    VehiclePropValue prop = {};
+    prop.prop = result.value();
+    prop.status = VehiclePropertyStatus::AVAILABLE;
+    optionIndex++;
+    std::unordered_set<std::string> parsedOptions;
+
+    while (optionIndex < options.size()) {
+        std::string type = options[optionIndex];
+        optionIndex++;
+        size_t currentIndex = optionIndex;
+        std::vector<std::string> values = getOptionValues(options, &optionIndex);
+        if (parsedOptions.find(type) != parsedOptions.end()) {
+            return Error() << StringPrintf("Duplicate \"%s\" options\n", type.c_str());
+        }
+        parsedOptions.insert(type);
+        if (EqualsIgnoreCase(type, "-i")) {
+            if (values.size() == 0) {
+                return Error() << "No values specified when using \"-i\"\n";
+            }
+            prop.value.int32Values.resize(values.size());
+            for (size_t i = 0; i < values.size(); i++) {
+                auto int32Result = safelyParseInt<int32_t>(currentIndex + i, values[i]);
+                if (!int32Result.ok()) {
+                    return Error()
+                           << StringPrintf("Value: \"%s\" is not a valid int: %s\n",
+                                           values[i].c_str(), getErrorMsg(int32Result).c_str());
+                }
+                prop.value.int32Values[i] = int32Result.value();
+            }
+        } else if (EqualsIgnoreCase(type, "-i64")) {
+            if (values.size() == 0) {
+                return Error() << "No values specified when using \"-i64\"\n";
+            }
+            prop.value.int64Values.resize(values.size());
+            for (size_t i = 0; i < values.size(); i++) {
+                auto int64Result = safelyParseInt<int64_t>(currentIndex + i, values[i]);
+                if (!int64Result.ok()) {
+                    return Error()
+                           << StringPrintf("Value: \"%s\" is not a valid int64: %s\n",
+                                           values[i].c_str(), getErrorMsg(int64Result).c_str());
+                }
+                prop.value.int64Values[i] = int64Result.value();
+            }
+        } else if (EqualsIgnoreCase(type, "-f")) {
+            if (values.size() == 0) {
+                return Error() << "No values specified when using \"-f\"\n";
+            }
+            prop.value.floatValues.resize(values.size());
+            for (size_t i = 0; i < values.size(); i++) {
+                auto floatResult = safelyParseFloat(currentIndex + i, values[i]);
+                if (!floatResult.ok()) {
+                    return Error()
+                           << StringPrintf("Value: \"%s\" is not a valid float: %s\n",
+                                           values[i].c_str(), getErrorMsg(floatResult).c_str());
+                }
+                prop.value.floatValues[i] = floatResult.value();
+            }
+        } else if (EqualsIgnoreCase(type, "-s")) {
+            if (values.size() != 1) {
+                return Error() << "Expect exact one value when using \"-s\"\n";
+            }
+            prop.value.stringValue = values[0];
+        } else if (EqualsIgnoreCase(type, "-b")) {
+            if (values.size() != 1) {
+                return Error() << "Expect exact one value when using \"-b\"\n";
+            }
+            auto bytesResult = parseHexString(values[0]);
+            if (!bytesResult.ok()) {
+                return Error() << StringPrintf("value: \"%s\" is not a valid hex string: %s\n",
+                                               values[0].c_str(), getErrorMsg(bytesResult).c_str());
+            }
+            prop.value.byteValues = std::move(bytesResult.value());
+        } else if (EqualsIgnoreCase(type, "-a")) {
+            if (values.size() != 1) {
+                return Error() << "Expect exact one value when using \"-a\"\n";
+            }
+            auto int32Result = safelyParseInt<int32_t>(currentIndex, values[0]);
+            if (!int32Result.ok()) {
+                return Error() << StringPrintf("Area ID: \"%s\" is not a valid int: %s\n",
+                                               values[0].c_str(), getErrorMsg(int32Result).c_str());
+            }
+            prop.areaId = int32Result.value();
+        } else {
+            return Error() << StringPrintf("Unknown option: %s\n", type.c_str());
+        }
+    }
+
+    return prop;
+}
+
+std::string FakeVehicleHardware::dumpSetProperties(const std::vector<std::string>& options) {
+    if (auto result = checkArgumentsSize(options, 3); !result.ok()) {
+        return getErrorMsg(result);
+    }
+
+    auto parseResult = parseSetPropOptions(options);
+    if (!parseResult.ok()) {
+        return getErrorMsg(parseResult);
+    }
+    VehiclePropValue prop = std::move(parseResult.value());
+    ALOGD("Dump: Setting property: %s", prop.toString().c_str());
+
+    bool isSpecialValue = false;
+    auto setResult = maybeSetSpecialValue(prop, &isSpecialValue);
+
+    if (!isSpecialValue) {
+        auto updatedValue = mValuePool->obtain(prop);
+        updatedValue->timestamp = elapsedRealtimeNano();
+        setResult = mServerSidePropStore->writeValue(std::move(updatedValue));
+    }
+
+    if (setResult.ok()) {
+        return StringPrintf("Set property: %s\n", prop.toString().c_str());
+    }
+    return StringPrintf("failed to set property: %s, error: %s\n", prop.toString().c_str(),
+                        getErrorMsg(setResult).c_str());
+}
+
 StatusCode FakeVehicleHardware::checkHealth() {
-    // TODO(b/201830716): Implement this.
+    // Always return OK for checkHealth.
     return StatusCode::OK;
 }
 
@@ -544,6 +849,49 @@
     }
 }
 
+Result<float> FakeVehicleHardware::safelyParseFloat(int index, const std::string& s) {
+    float out;
+    if (!ParseFloat(s, &out)) {
+        return Error() << StringPrintf("non-float argument at index %d: %s\n", index, s.c_str());
+    }
+    return out;
+}
+
+Result<std::vector<uint8_t>> FakeVehicleHardware::parseHexString(const std::string& s) {
+    std::vector<uint8_t> bytes;
+    if (s.size() % 2 != 0) {
+        return Error() << StringPrintf("invalid hex string: %s, should have even size\n",
+                                       s.c_str());
+    }
+    if (!StartsWith(s, "0x")) {
+        return Error() << StringPrintf("hex string should start with \"0x\", got %s\n", s.c_str());
+    }
+    std::string subs = s.substr(2);
+    std::transform(subs.begin(), subs.end(), subs.begin(),
+                   [](unsigned char c) { return std::tolower(c); });
+
+    bool highDigit = true;
+    for (size_t i = 0; i < subs.size(); i++) {
+        char c = subs[i];
+        uint8_t v;
+        if (c >= '0' && c <= '9') {
+            v = c - '0';
+        } else if (c >= 'a' && c <= 'f') {
+            v = c - 'a' + 10;
+        } else {
+            return Error() << StringPrintf("invalid character %c in hex string %s\n", c,
+                                           subs.c_str());
+        }
+        if (highDigit) {
+            bytes.push_back(v * 16);
+        } else {
+            bytes[bytes.size() - 1] += v;
+        }
+        highDigit = !highDigit;
+    }
+    return bytes;
+}
+
 }  // namespace fake
 }  // namespace vehicle
 }  // namespace automotive
diff --git a/automotive/vehicle/aidl/impl/fake_impl/hardware/test/FakeVehicleHardwareTest.cpp b/automotive/vehicle/aidl/impl/fake_impl/hardware/test/FakeVehicleHardwareTest.cpp
index 970d044..0812c2a 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/test/FakeVehicleHardwareTest.cpp
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/test/FakeVehicleHardwareTest.cpp
@@ -24,6 +24,7 @@
 
 #include <android-base/expected.h>
 #include <android-base/file.h>
+#include <android-base/stringprintf.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <utils/Log.h>
@@ -52,13 +53,16 @@
 using ::aidl::android::hardware::automotive::vehicle::VehiclePropertyStatus;
 using ::aidl::android::hardware::automotive::vehicle::VehiclePropValue;
 using ::android::base::expected;
+using ::android::base::StringPrintf;
 using ::android::base::unexpected;
 using ::testing::ContainerEq;
+using ::testing::ContainsRegex;
 using ::testing::Eq;
 using ::testing::IsSubsetOf;
 using ::testing::WhenSortedBy;
 
 constexpr int INVALID_PROP_ID = 0;
+constexpr char CAR_MAKE[] = "Default Car";
 
 }  // namespace
 
@@ -1203,6 +1207,261 @@
                          }));
 }
 
+TEST_F(FakeVehicleHardwareTest, testDumpAllProperties) {
+    std::vector<std::string> options;
+    DumpResult result = getHardware()->dump(options);
+    ASSERT_TRUE(result.callerShouldDumpState);
+    ASSERT_NE(result.buffer, "");
+    ASSERT_THAT(result.buffer, ContainsRegex("dumping .+ properties"));
+}
+
+TEST_F(FakeVehicleHardwareTest, testDumpHelp) {
+    std::vector<std::string> options;
+    options.push_back("--help");
+    DumpResult result = getHardware()->dump(options);
+    ASSERT_FALSE(result.callerShouldDumpState);
+    ASSERT_NE(result.buffer, "");
+    ASSERT_THAT(result.buffer, ContainsRegex("Usage: "));
+}
+
+TEST_F(FakeVehicleHardwareTest, testDumpListProperties) {
+    std::vector<std::string> options;
+    options.push_back("--list");
+    DumpResult result = getHardware()->dump(options);
+    ASSERT_FALSE(result.callerShouldDumpState);
+    ASSERT_NE(result.buffer, "");
+    ASSERT_THAT(result.buffer, ContainsRegex("listing .+ properties"));
+}
+
+TEST_F(FakeVehicleHardwareTest, testDumpSpecificProperties) {
+    std::vector<std::string> options;
+    options.push_back("--get");
+    std::string prop1 = std::to_string(toInt(VehicleProperty::INFO_FUEL_CAPACITY));
+    std::string prop2 = std::to_string(toInt(VehicleProperty::TIRE_PRESSURE));
+    options.push_back(prop1);
+    options.push_back(prop2);
+    DumpResult result = getHardware()->dump(options);
+    ASSERT_FALSE(result.callerShouldDumpState);
+    ASSERT_NE(result.buffer, "");
+    ASSERT_THAT(result.buffer,
+                ContainsRegex(StringPrintf("1:.*prop: %s.*\n2-0:.*prop: %s.*\n2-1:.*prop: %s.*\n",
+                                           prop1.c_str(), prop2.c_str(), prop2.c_str())));
+}
+
+TEST_F(FakeVehicleHardwareTest, testDumpSpecificPropertiesInvalidProp) {
+    std::vector<std::string> options;
+    options.push_back("--get");
+    std::string prop1 = std::to_string(toInt(VehicleProperty::INFO_FUEL_CAPACITY));
+    std::string prop2 = std::to_string(INVALID_PROP_ID);
+    options.push_back(prop1);
+    options.push_back(prop2);
+    DumpResult result = getHardware()->dump(options);
+    ASSERT_FALSE(result.callerShouldDumpState);
+    ASSERT_NE(result.buffer, "");
+    ASSERT_THAT(result.buffer, ContainsRegex(StringPrintf("1:.*prop: %s.*\nNo property %d\n",
+                                                          prop1.c_str(), INVALID_PROP_ID)));
+}
+
+TEST_F(FakeVehicleHardwareTest, testDumpSpecificPropertiesNoArg) {
+    std::vector<std::string> options;
+    options.push_back("--get");
+
+    // No arguments.
+    DumpResult result = getHardware()->dump(options);
+    ASSERT_FALSE(result.callerShouldDumpState);
+    ASSERT_NE(result.buffer, "");
+    ASSERT_THAT(result.buffer, ContainsRegex("Invalid number of arguments"));
+}
+
+TEST_F(FakeVehicleHardwareTest, testDumpInvalidOptions) {
+    std::vector<std::string> options;
+    options.push_back("--invalid");
+
+    DumpResult result = getHardware()->dump(options);
+    ASSERT_FALSE(result.callerShouldDumpState);
+    ASSERT_NE(result.buffer, "");
+    ASSERT_THAT(result.buffer, ContainsRegex("Invalid option: --invalid"));
+}
+
+struct SetPropTestCase {
+    std::string test_name;
+    std::vector<std::string> options;
+    bool success;
+    std::string errorMsg = "";
+};
+
+class FakeVehicleHardwareSetPropTest : public FakeVehicleHardwareTest,
+                                       public testing::WithParamInterface<SetPropTestCase> {};
+
+TEST_P(FakeVehicleHardwareSetPropTest, cmdSetOneProperty) {
+    const SetPropTestCase& tc = GetParam();
+
+    DumpResult result = getHardware()->dump(tc.options);
+    ASSERT_FALSE(result.callerShouldDumpState);
+    ASSERT_NE(result.buffer, "");
+    if (tc.success) {
+        ASSERT_THAT(result.buffer, ContainsRegex("Set property:"));
+    } else {
+        ASSERT_THAT(result.buffer, ContainsRegex(tc.errorMsg));
+    }
+}
+
+std::vector<SetPropTestCase> GenSetPropParams() {
+    std::string infoMakeProperty = std::to_string(toInt(VehicleProperty::INFO_MAKE));
+    return {
+            {"success_set_string", {"--set", infoMakeProperty, "-s", CAR_MAKE}, true},
+            {"success_set_bytes", {"--set", infoMakeProperty, "-b", "0xdeadbeef"}, true},
+            {"success_set_bytes_caps", {"--set", infoMakeProperty, "-b", "0xDEADBEEF"}, true},
+            {"success_set_int", {"--set", infoMakeProperty, "-i", "2147483647"}, true},
+            {"success_set_ints",
+             {"--set", infoMakeProperty, "-i", "2147483647", "0", "-2147483648"},
+             true},
+            {"success_set_int64",
+             {"--set", infoMakeProperty, "-i64", "-9223372036854775808"},
+             true},
+            {"success_set_int64s",
+             {"--set", infoMakeProperty, "-i64", "-9223372036854775808", "0",
+              "9223372036854775807"},
+             true},
+            {"success_set_float", {"--set", infoMakeProperty, "-f", "1.175494351E-38"}, true},
+            {"success_set_floats",
+             {"--set", infoMakeProperty, "-f", "-3.402823466E+38", "0", "3.402823466E+38"},
+             true},
+            {"success_set_area", {"--set", infoMakeProperty, "-a", "2147483647"}, true},
+            {"fail_no_options", {"--set", infoMakeProperty}, false, "Invalid number of arguments"},
+            {"fail_less_than_4_options",
+             {"--set", infoMakeProperty, "-i"},
+             false,
+             "No values specified"},
+            {"fail_unknown_options", {"--set", infoMakeProperty, "-abcd"}, false, "Unknown option"},
+            {"fail_invalid_property",
+             {"--set", "not valid", "-s", CAR_MAKE},
+             false,
+             "not a valid int"},
+            {"fail_duplicate_string",
+             {"--set", infoMakeProperty, "-s", CAR_MAKE, "-s", CAR_MAKE},
+             false,
+             "Duplicate \"-s\" options"},
+            {"fail_multiple_strings",
+             {"--set", infoMakeProperty, "-s", CAR_MAKE, CAR_MAKE},
+             false,
+             "Expect exact one value"},
+            {"fail_no_string_value",
+             {"--set", infoMakeProperty, "-s", "-a", "1234"},
+             false,
+             "Expect exact one value"},
+            {"fail_duplicate_bytes",
+             {"--set", infoMakeProperty, "-b", "0xdeadbeef", "-b", "0xdeadbeef"},
+             false,
+             "Duplicate \"-b\" options"},
+            {"fail_multiple_bytes",
+             {"--set", infoMakeProperty, "-b", "0xdeadbeef", "0xdeadbeef"},
+             false,
+             "Expect exact one value"},
+            {"fail_invalid_bytes",
+             {"--set", infoMakeProperty, "-b", "0xgood"},
+             false,
+             "not a valid hex string"},
+            {"fail_invalid_bytes_no_prefix",
+             {"--set", infoMakeProperty, "-b", "deadbeef"},
+             false,
+             "not a valid hex string"},
+            {"fail_invalid_int",
+             {"--set", infoMakeProperty, "-i", "abc"},
+             false,
+             "not a valid int"},
+            {"fail_int_out_of_range",
+             {"--set", infoMakeProperty, "-i", "2147483648"},
+             false,
+             "not a valid int"},
+            {"fail_no_int_value",
+             {"--set", infoMakeProperty, "-i", "-s", CAR_MAKE},
+             false,
+             "No values specified"},
+            {"fail_invalid_int64",
+             {"--set", infoMakeProperty, "-i64", "abc"},
+             false,
+             "not a valid int64"},
+            {"fail_int64_out_of_range",
+             {"--set", infoMakeProperty, "-i64", "-9223372036854775809"},
+             false,
+             "not a valid int64"},
+            {"fail_no_int64_value",
+             {"--set", infoMakeProperty, "-i64", "-s", CAR_MAKE},
+             false,
+             "No values specified"},
+            {"fail_invalid_float",
+             {"--set", infoMakeProperty, "-f", "abc"},
+             false,
+             "not a valid float"},
+            {"fail_float_out_of_range",
+             {"--set", infoMakeProperty, "-f", "-3.402823466E+39"},
+             false,
+             "not a valid float"},
+            {"fail_no_float_value",
+             {"--set", infoMakeProperty, "-f", "-s", CAR_MAKE},
+             false,
+             "No values specified"},
+            {"fail_multiple_areas",
+             {"--set", infoMakeProperty, "-a", "2147483648", "0"},
+             false,
+             "Expect exact one value"},
+            {"fail_invalid_area",
+             {"--set", infoMakeProperty, "-a", "abc"},
+             false,
+             "not a valid int"},
+            {"fail_area_out_of_range",
+             {"--set", infoMakeProperty, "-a", "2147483648"},
+             false,
+             "not a valid int"},
+            {"fail_no_area_value",
+             {"--set", infoMakeProperty, "-a", "-s", CAR_MAKE},
+             false,
+             "Expect exact one value"},
+    };
+}
+
+INSTANTIATE_TEST_SUITE_P(
+        FakeVehicleHardwareSetPropTests, FakeVehicleHardwareSetPropTest,
+        testing::ValuesIn(GenSetPropParams()),
+        [](const testing::TestParamInfo<FakeVehicleHardwareSetPropTest::ParamType>& info) {
+            return info.param.test_name;
+        });
+
+TEST_F(FakeVehicleHardwareTest, SetComplexPropTest) {
+    std::string infoMakeProperty = std::to_string(toInt(VehicleProperty::INFO_MAKE));
+    getHardware()->dump({"--set", infoMakeProperty,      "-s",   CAR_MAKE,
+                         "-b",    "0xdeadbeef",          "-i",   "2147483647",
+                         "0",     "-2147483648",         "-i64", "-9223372036854775808",
+                         "0",     "9223372036854775807", "-f",   "-3.402823466E+38",
+                         "0",     "3.402823466E+38",     "-a",   "123"});
+    VehiclePropValue requestProp;
+    requestProp.prop = toInt(VehicleProperty::INFO_MAKE);
+    requestProp.areaId = 123;
+    auto result = getValue(requestProp);
+    ASSERT_TRUE(result.ok());
+    VehiclePropValue value = result.value();
+    ASSERT_EQ(value.prop, toInt(VehicleProperty::INFO_MAKE));
+    ASSERT_EQ(value.areaId, 123);
+    ASSERT_STREQ(CAR_MAKE, value.value.stringValue.c_str());
+    uint8_t bytes[] = {0xde, 0xad, 0xbe, 0xef};
+    ASSERT_FALSE(memcmp(bytes, value.value.byteValues.data(), sizeof(bytes)));
+    ASSERT_EQ(3u, value.value.int32Values.size());
+    ASSERT_EQ(2147483647, value.value.int32Values[0]);
+    ASSERT_EQ(0, value.value.int32Values[1]);
+    ASSERT_EQ(-2147483648, value.value.int32Values[2]);
+    ASSERT_EQ(3u, value.value.int64Values.size());
+    // -9223372036854775808 is not a valid literal since '-' and '9223372036854775808' would be two
+    // tokens and the later does not fit in unsigned long long.
+    ASSERT_EQ(-9223372036854775807 - 1, value.value.int64Values[0]);
+    ASSERT_EQ(0, value.value.int64Values[1]);
+    ASSERT_EQ(9223372036854775807, value.value.int64Values[2]);
+    ASSERT_EQ(3u, value.value.floatValues.size());
+    ASSERT_EQ(-3.402823466E+38f, value.value.floatValues[0]);
+    ASSERT_EQ(0.0f, value.value.floatValues[1]);
+    ASSERT_EQ(3.402823466E+38f, value.value.floatValues[2]);
+}
+
 }  // namespace fake
 }  // namespace vehicle
 }  // namespace automotive
diff --git a/automotive/vehicle/aidl/impl/vhal/include/ConnectedClient.h b/automotive/vehicle/aidl/impl/vhal/include/ConnectedClient.h
index 833707a..15a6278 100644
--- a/automotive/vehicle/aidl/impl/vhal/include/ConnectedClient.h
+++ b/automotive/vehicle/aidl/impl/vhal/include/ConnectedClient.h
@@ -79,7 +79,7 @@
     GetSetValuesClient(std::shared_ptr<PendingRequestPool> requestPool, CallbackType callback);
 
     // Sends the results to this client.
-    void sendResults(const std::vector<ResultType>& results);
+    void sendResults(std::vector<ResultType>&& results);
 
     // Sends each result separately to this client. Each result would be sent through one callback
     // invocation.
diff --git a/automotive/vehicle/aidl/impl/vhal/include/DefaultVehicleHal.h b/automotive/vehicle/aidl/impl/vhal/include/DefaultVehicleHal.h
index 62b2627..5e7adfc 100644
--- a/automotive/vehicle/aidl/impl/vhal/include/DefaultVehicleHal.h
+++ b/automotive/vehicle/aidl/impl/vhal/include/DefaultVehicleHal.h
@@ -39,13 +39,6 @@
 namespace automotive {
 namespace vehicle {
 
-// private namespace
-namespace defaultvehiclehal_impl {
-
-constexpr int INVALID_MEMORY_FD = -1;
-
-}  // namespace defaultvehiclehal_impl
-
 class DefaultVehicleHal final : public ::aidl::android::hardware::automotive::vehicle::BnVehicle {
   public:
     using CallbackType =
@@ -79,6 +72,7 @@
                                      const std::vector<int32_t>& propIds) override;
     ::ndk::ScopedAStatus returnSharedMemory(const CallbackType& callback,
                                             int64_t sharedMemoryId) override;
+    binder_status_t dump(int fd, const char** args, uint32_t numArgs) override;
 
     IVehicleHardware* getHardware();
 
@@ -215,6 +209,8 @@
 
     void monitorBinderLifeCycle(const CallbackType& callback);
 
+    bool checkDumpPermission();
+
     template <class T>
     static std::shared_ptr<T> getOrCreateClient(
             std::unordered_map<const AIBinder*, std::shared_ptr<T>>* clients,
diff --git a/automotive/vehicle/aidl/impl/vhal/include/ParcelableUtils.h b/automotive/vehicle/aidl/impl/vhal/include/ParcelableUtils.h
index 4b7c2f3..7b2111b 100644
--- a/automotive/vehicle/aidl/impl/vhal/include/ParcelableUtils.h
+++ b/automotive/vehicle/aidl/impl/vhal/include/ParcelableUtils.h
@@ -29,6 +29,9 @@
 namespace automotive {
 namespace vehicle {
 
+// Turns the values into a stable large parcelable that could be sent via binder.
+// If values is small enough, it would be put into output.payloads, otherwise a shared memory file
+// would be created and output.sharedMemoryFd would be filled in.
 template <class T1, class T2>
 ::ndk::ScopedAStatus vectorToStableLargeParcelable(std::vector<T1>&& values, T2* output) {
     output->payloads = std::move(values);
@@ -44,6 +47,9 @@
         // 'sharedMemoryFd' field.
         output->payloads.clear();
         output->sharedMemoryFd = std::move(*fd);
+    } else {
+        output->sharedMemoryFd = ::ndk::ScopedFileDescriptor();
+        // Do not modify payloads.
     }
     return ::ndk::ScopedAStatus::ok();
 }
diff --git a/automotive/vehicle/aidl/impl/vhal/src/ConnectedClient.cpp b/automotive/vehicle/aidl/impl/vhal/src/ConnectedClient.cpp
index 5ccef55..098bfee 100644
--- a/automotive/vehicle/aidl/impl/vhal/src/ConnectedClient.cpp
+++ b/automotive/vehicle/aidl/impl/vhal/src/ConnectedClient.cpp
@@ -84,9 +84,9 @@
 // Send all the GetValue/SetValue results through callback in a single callback invocation.
 template <class ResultType, class ResultsType>
 void sendGetOrSetValueResults(std::shared_ptr<IVehicleCallback> callback,
-                              const std::vector<ResultType>& results) {
+                              std::vector<ResultType>&& results) {
     ResultsType parcelableResults;
-    ScopedAStatus status = vectorToStableLargeParcelable(results, &parcelableResults);
+    ScopedAStatus status = vectorToStableLargeParcelable(std::move(results), &parcelableResults);
     if (status.isOk()) {
         if (ScopedAStatus callbackStatus = callCallback(callback, parcelableResults);
             !callbackStatus.isOk()) {
@@ -99,7 +99,8 @@
     ALOGE("failed to marshal result into large parcelable, error: "
           "%s, code: %d",
           status.getMessage(), statusCode);
-    sendGetOrSetValueResultsSeparately<ResultType, ResultsType>(callback, results);
+    sendGetOrSetValueResultsSeparately<ResultType, ResultsType>(callback,
+                                                                parcelableResults.payloads);
 }
 
 // The timeout callback for GetValues/SetValues.
@@ -115,7 +116,7 @@
                 .status = StatusCode::TRY_AGAIN,
         });
     }
-    sendGetOrSetValueResults<ResultType, ResultsType>(callback, timeoutResults);
+    sendGetOrSetValueResults<ResultType, ResultsType>(callback, std::move(timeoutResults));
 }
 
 // The on-results callback for GetValues/SetValues.
@@ -123,7 +124,7 @@
 void getOrSetValuesCallback(
         const void* clientId,
         std::shared_ptr<::aidl::android::hardware::automotive::vehicle::IVehicleCallback> callback,
-        std::vector<ResultType> results, std::shared_ptr<PendingRequestPool> requestPool) {
+        std::vector<ResultType>&& results, std::shared_ptr<PendingRequestPool> requestPool) {
     std::unordered_set<int64_t> requestIds;
     for (const auto& result : results) {
         requestIds.insert(result.requestId);
@@ -145,7 +146,7 @@
     }
 
     if (!results.empty()) {
-        sendGetOrSetValueResults<ResultType, ResultsType>(callback, results);
+        sendGetOrSetValueResults<ResultType, ResultsType>(callback, std::move(results));
     }
 }
 
@@ -156,9 +157,9 @@
         std::shared_ptr<IVehicleCallback> callback, const SetValueResult& result);
 
 template void sendGetOrSetValueResults<GetValueResult, GetValueResults>(
-        std::shared_ptr<IVehicleCallback> callback, const std::vector<GetValueResult>& results);
+        std::shared_ptr<IVehicleCallback> callback, std::vector<GetValueResult>&& results);
 template void sendGetOrSetValueResults<SetValueResult, SetValueResults>(
-        std::shared_ptr<IVehicleCallback> callback, const std::vector<SetValueResult>& results);
+        std::shared_ptr<IVehicleCallback> callback, std::vector<SetValueResult>&& results);
 
 template void sendGetOrSetValueResultsSeparately<GetValueResult, GetValueResults>(
         std::shared_ptr<IVehicleCallback> callback, const std::vector<GetValueResult>& results);
@@ -175,11 +176,11 @@
 template void getOrSetValuesCallback<GetValueResult, GetValueResults>(
         const void* clientId,
         std::shared_ptr<::aidl::android::hardware::automotive::vehicle::IVehicleCallback> callback,
-        std::vector<GetValueResult> results, std::shared_ptr<PendingRequestPool> requestPool);
+        std::vector<GetValueResult>&& results, std::shared_ptr<PendingRequestPool> requestPool);
 template void getOrSetValuesCallback<SetValueResult, SetValueResults>(
         const void* clientId,
         std::shared_ptr<::aidl::android::hardware::automotive::vehicle::IVehicleCallback> callback,
-        std::vector<SetValueResult> results, std::shared_ptr<PendingRequestPool> requestPool);
+        std::vector<SetValueResult>&& results, std::shared_ptr<PendingRequestPool> requestPool);
 
 }  // namespace
 
@@ -230,9 +231,8 @@
 }
 
 template <class ResultType, class ResultsType>
-void GetSetValuesClient<ResultType, ResultsType>::sendResults(
-        const std::vector<ResultType>& results) {
-    return sendGetOrSetValueResults<ResultType, ResultsType>(mCallback, results);
+void GetSetValuesClient<ResultType, ResultsType>::sendResults(std::vector<ResultType>&& results) {
+    return sendGetOrSetValueResults<ResultType, ResultsType>(mCallback, std::move(results));
 }
 
 template <class ResultType, class ResultsType>
@@ -283,7 +283,8 @@
     // TODO(b/205189110): Use memory pool here and fill in sharedMemoryId.
     VehiclePropValues vehiclePropValues;
     int32_t sharedMemoryFileCount = 0;
-    ScopedAStatus status = vectorToStableLargeParcelable(updatedValues, &vehiclePropValues);
+    ScopedAStatus status =
+            vectorToStableLargeParcelable(std::move(updatedValues), &vehiclePropValues);
     if (!status.isOk()) {
         int statusCode = status.getServiceSpecificError();
         ALOGE("subscribe: failed to marshal result into large parcelable, error: "
diff --git a/automotive/vehicle/aidl/impl/vhal/src/DefaultVehicleHal.cpp b/automotive/vehicle/aidl/impl/vhal/src/DefaultVehicleHal.cpp
index 3e088c5..c0a66da 100644
--- a/automotive/vehicle/aidl/impl/vhal/src/DefaultVehicleHal.cpp
+++ b/automotive/vehicle/aidl/impl/vhal/src/DefaultVehicleHal.cpp
@@ -24,6 +24,8 @@
 
 #include <android-base/result.h>
 #include <android-base/stringprintf.h>
+#include <android/binder_ibinder.h>
+#include <private/android_filesystem_config.h>
 #include <utils/Log.h>
 #include <utils/SystemClock.h>
 
@@ -387,7 +389,7 @@
 
     if (!failedResults.empty()) {
         // First send the failed results we already know back to the client.
-        client->sendResults(failedResults);
+        client->sendResults(std::move(failedResults));
     }
 
     if (hardwareRequests.empty()) {
@@ -476,7 +478,7 @@
 
     if (!failedResults.empty()) {
         // First send the failed results we already know back to the client.
-        client->sendResults(failedResults);
+        client->sendResults(std::move(failedResults));
     }
 
     if (hardwareRequests.empty()) {
@@ -718,6 +720,39 @@
     mLinkToDeathImpl = std::move(impl);
 }
 
+bool DefaultVehicleHal::checkDumpPermission() {
+    uid_t uid = AIBinder_getCallingUid();
+    return uid == AID_ROOT || uid == AID_SHELL || uid == AID_SYSTEM;
+}
+
+binder_status_t DefaultVehicleHal::dump(int fd, const char** args, uint32_t numArgs) {
+    if (!checkDumpPermission()) {
+        dprintf(fd, "Caller must be root, system or shell");
+        return STATUS_PERMISSION_DENIED;
+    }
+
+    std::vector<std::string> options;
+    for (uint32_t i = 0; i < numArgs; i++) {
+        options.push_back(args[i]);
+    }
+    DumpResult result = mVehicleHardware->dump(options);
+    dprintf(fd, "%s", (result.buffer + "\n").c_str());
+    if (!result.callerShouldDumpState) {
+        dprintf(fd, "Skip dumping Vehicle HAL State.\n");
+        return STATUS_OK;
+    }
+    dprintf(fd, "Vehicle HAL State: \n");
+    {
+        std::scoped_lock<std::mutex> lockGuard(mLock);
+        dprintf(fd, "Containing %zu property configs\n", mConfigsByPropId.size());
+        dprintf(fd, "Currently have %zu getValues clients\n", mGetValuesClients.size());
+        dprintf(fd, "Currently have %zu setValues clients\n", mSetValuesClients.size());
+        dprintf(fd, "Currently have %zu subscription clients\n",
+                mSubscriptionClients->countClients());
+    }
+    return STATUS_OK;
+}
+
 }  // namespace vehicle
 }  // namespace automotive
 }  // namespace hardware
diff --git a/automotive/vehicle/aidl/impl/vhal/test/ConnectedClientTest.cpp b/automotive/vehicle/aidl/impl/vhal/test/ConnectedClientTest.cpp
index bd4a565..bdb0d31 100644
--- a/automotive/vehicle/aidl/impl/vhal/test/ConnectedClientTest.cpp
+++ b/automotive/vehicle/aidl/impl/vhal/test/ConnectedClientTest.cpp
@@ -80,7 +80,8 @@
 
     GetValuesClient client(getPool(), getCallbackClient());
 
-    client.sendResults(results);
+    auto resultsCopy = results;
+    client.sendResults(std::move(resultsCopy));
 
     auto maybeGetValueResults = getCallback()->nextGetValueResults();
     ASSERT_TRUE(maybeGetValueResults.has_value());
@@ -160,7 +161,8 @@
 
     SetValuesClient client(getPool(), getCallbackClient());
 
-    client.sendResults(results);
+    auto resultsCopy = results;
+    client.sendResults(std::move(resultsCopy));
 
     auto maybeSetValueResults = getCallback()->nextSetValueResults();
     ASSERT_TRUE(maybeSetValueResults.has_value());
diff --git a/automotive/vehicle/aidl/impl/vhal/test/DefaultVehicleHalTest.cpp b/automotive/vehicle/aidl/impl/vhal/test/DefaultVehicleHalTest.cpp
index ff355c3..7443d5b 100644
--- a/automotive/vehicle/aidl/impl/vhal/test/DefaultVehicleHalTest.cpp
+++ b/automotive/vehicle/aidl/impl/vhal/test/DefaultVehicleHalTest.cpp
@@ -27,6 +27,7 @@
 #include <android-base/thread_annotations.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
+#include <sys/mman.h>
 #include <utils/Log.h>
 #include <utils/SystemClock.h>
 
@@ -75,6 +76,7 @@
 using ::ndk::ScopedFileDescriptor;
 using ::ndk::SpAIBinder;
 
+using ::testing::ContainsRegex;
 using ::testing::Eq;
 using ::testing::UnorderedElementsAre;
 using ::testing::UnorderedElementsAreArray;
@@ -371,7 +373,7 @@
         return mVhal->mOnBinderDiedContexts[clientId].get();
     }
 
-    bool countOnBinderDiedContexts() {
+    size_t countOnBinderDiedContexts() {
         std::scoped_lock<std::mutex> lockGuard(mVhal->mLock);
         return mVhal->mOnBinderDiedContexts.size();
     }
@@ -444,6 +446,7 @@
         if (result.value() != nullptr) {
             requests.payloads.clear();
             requests.sharedMemoryFd = std::move(*result.value());
+            requests.payloads.clear();
         }
         return {};
     }
@@ -1544,6 +1547,45 @@
             << "expect OnBinderDied context to be deleted when binder is unlinked";
 }
 
+TEST_F(DefaultVehicleHalTest, testDumpCallerShouldDump) {
+    std::string buffer = "Dump from hardware";
+    getHardware()->setDumpResult({
+            .callerShouldDumpState = true,
+            .buffer = buffer,
+    });
+    int fd = memfd_create("memfile", 0);
+    getClient()->dump(fd, nullptr, 0);
+
+    lseek(fd, 0, SEEK_SET);
+    char buf[10240] = {};
+    read(fd, buf, sizeof(buf));
+    close(fd);
+
+    std::string msg(buf);
+
+    ASSERT_THAT(msg, ContainsRegex(buffer + "\nVehicle HAL State: \n"));
+}
+
+TEST_F(DefaultVehicleHalTest, testDumpCallerShouldNotDump) {
+    std::string buffer = "Dump from hardware";
+    getHardware()->setDumpResult({
+            .callerShouldDumpState = false,
+            .buffer = buffer,
+    });
+    int fd = memfd_create("memfile", 0);
+    getClient()->dump(fd, nullptr, 0);
+
+    lseek(fd, 0, SEEK_SET);
+    char buf[10240] = {};
+    read(fd, buf, sizeof(buf));
+    close(fd);
+
+    std::string msg(buf);
+
+    ASSERT_THAT(msg, ContainsRegex(buffer));
+    ASSERT_EQ(msg.find("Vehicle HAL State: "), std::string::npos);
+}
+
 }  // namespace vehicle
 }  // namespace automotive
 }  // namespace hardware
diff --git a/automotive/vehicle/aidl/impl/vhal/test/MockVehicleHardware.cpp b/automotive/vehicle/aidl/impl/vhal/test/MockVehicleHardware.cpp
index eec32dd..66aef7c 100644
--- a/automotive/vehicle/aidl/impl/vhal/test/MockVehicleHardware.cpp
+++ b/automotive/vehicle/aidl/impl/vhal/test/MockVehicleHardware.cpp
@@ -71,13 +71,15 @@
                                 &mGetValueResponses);
 }
 
+void MockVehicleHardware::setDumpResult(DumpResult result) {
+    mDumpResult = result;
+}
+
 DumpResult MockVehicleHardware::dump(const std::vector<std::string>&) {
-    // TODO(b/200737967): mock this.
-    return DumpResult{};
+    return mDumpResult;
 }
 
 StatusCode MockVehicleHardware::checkHealth() {
-    // TODO(b/200737967): mock this.
     return StatusCode::OK;
 }
 
diff --git a/automotive/vehicle/aidl/impl/vhal/test/MockVehicleHardware.h b/automotive/vehicle/aidl/impl/vhal/test/MockVehicleHardware.h
index 0844de1..74d4fae 100644
--- a/automotive/vehicle/aidl/impl/vhal/test/MockVehicleHardware.h
+++ b/automotive/vehicle/aidl/impl/vhal/test/MockVehicleHardware.h
@@ -79,6 +79,7 @@
     void setStatus(const char* functionName,
                    ::aidl::android::hardware::automotive::vehicle::StatusCode status);
     void setSleepTime(int64_t timeInNano);
+    void setDumpResult(DumpResult result);
 
   private:
     mutable std::mutex mLock;
@@ -114,6 +115,8 @@
             const std::vector<RequestType>& requests,
             std::list<std::vector<RequestType>>* storedRequests,
             std::list<std::vector<ResultType>>* storedResponses) const REQUIRES(mLock);
+
+    DumpResult mDumpResult;
 };
 
 }  // namespace vehicle
diff --git a/automotive/vehicle/2.0/default/impl/vhal_v2_0/proto/Android.bp b/automotive/vehicle/proto/Android.bp
similarity index 94%
rename from automotive/vehicle/2.0/default/impl/vhal_v2_0/proto/Android.bp
rename to automotive/vehicle/proto/Android.bp
index 3307bd6..683f128 100644
--- a/automotive/vehicle/2.0/default/impl/vhal_v2_0/proto/Android.bp
+++ b/automotive/vehicle/proto/Android.bp
@@ -25,8 +25,8 @@
 cc_library_static {
     name: "android.hardware.automotive.vehicle@2.0-libproto-native",
     visibility: [
-        "//hardware/interfaces/automotive/vehicle/2.0/default:__subpackages__",
-        "//device/generic/car/emulator/vhal_v2_0:__subpackages__",
+        "//hardware/interfaces/automotive/vehicle:__subpackages__",
+        "//device/generic/car/emulator:__subpackages__",
     ],
     vendor: true,
     host_supported: true,
diff --git a/automotive/vehicle/proto/VehicleHalProto.proto b/automotive/vehicle/proto/VehicleHalProto.proto
new file mode 100644
index 0000000..0dafe8c
--- /dev/null
+++ b/automotive/vehicle/proto/VehicleHalProto.proto
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2015 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 = "proto2";
+
+package vhal_proto;
+
+// CMD messages are from workstation --> VHAL
+// RESP messages are from VHAL --> workstation
+enum MsgType {
+    GET_CONFIG_CMD = 0;
+    GET_CONFIG_RESP = 1;
+    GET_CONFIG_ALL_CMD = 2;
+    GET_CONFIG_ALL_RESP = 3;
+    GET_PROPERTY_CMD = 4;
+    GET_PROPERTY_RESP = 5;
+    GET_PROPERTY_ALL_CMD = 6;
+    GET_PROPERTY_ALL_RESP = 7;
+    SET_PROPERTY_CMD = 8;
+    SET_PROPERTY_RESP = 9;
+    SET_PROPERTY_ASYNC = 10;
+    DEBUG_CMD = 11;
+    DEBUG_RESP = 12;
+}
+enum Status {
+    RESULT_OK = 0;
+    ERROR_UNKNOWN = 1;
+    ERROR_UNIMPLEMENTED_CMD = 2;
+    ERROR_INVALID_PROPERTY = 3;
+    ERROR_INVALID_AREA_ID = 4;
+    ERROR_PROPERTY_UNINITIALIZED = 5;
+    ERROR_WRITE_ONLY_PROPERTY = 6;
+    ERROR_MEMORY_ALLOC_FAILED = 7;
+    ERROR_INVALID_OPERATION = 8;
+}
+
+enum VehiclePropStatus {
+    AVAILABLE = 0;
+    UNAVAILABLE = 1;
+    ERROR = 2;
+}
+
+message VehicleAreaConfig {
+    required int32 area_id = 1;
+    optional sint32 min_int32_value = 2;
+    optional sint32 max_int32_value = 3;
+    optional sint64 min_int64_value = 4;
+    optional sint64 max_int64_value = 5;
+    optional float min_float_value = 6;
+    optional float max_float_value = 7;
+}
+
+message VehiclePropConfig {
+    required int32 prop = 1;
+    optional int32 access = 2;
+    optional int32 change_mode = 3;
+    optional int32 value_type = 4;
+    optional int32 supported_areas = 5;  // Deprecated - DO NOT USE
+    repeated VehicleAreaConfig area_configs = 6;
+    optional int32 config_flags = 7;
+    repeated int32 config_array = 8;
+    optional string config_string = 9;
+    optional float min_sample_rate = 10;
+    optional float max_sample_rate = 11;
+};
+
+message VehiclePropValue {
+    // common data
+    required int32 prop = 1;
+    optional int32 value_type = 2;
+    optional int64 timestamp = 3;            // required for valid data from HAL, skipped for set
+    optional VehiclePropStatus status = 10;  // required for valid data from HAL, skipped for set
+
+    // values
+    optional int32 area_id = 4;
+    repeated sint32 int32_values = 5;  // this also covers boolean value.
+    repeated sint64 int64_values = 6;
+    repeated float float_values = 7;
+    optional string string_value = 8;
+    optional bytes bytes_value = 9;
+};
+
+// This structure is used to notify what values to get from the Vehicle HAL
+message VehiclePropGet {
+    required int32 prop = 1;
+    optional int32 area_id = 2;
+};
+
+message EmulatorMessage {
+    required MsgType msg_type = 1;
+    optional Status status = 2;        // Only for RESP messages
+    repeated VehiclePropGet prop = 3;  // Provided for getConfig, getProperty commands
+    repeated VehiclePropConfig config = 4;
+    repeated VehiclePropValue value = 5;
+    repeated string debug_commands = 6;  // Required for debug command
+    optional string debug_result = 7;    // Required for debug RESP messages
+};