add generic Pixel atrace HAL

Bug: 110111068
Bug: 131630776
Bug: 131352179
Test: take a trace
Change-Id: Ie6d8cde30a548a3fda617f1221e4e2dda2ae29d0

6 files changed, 277 insertions, 0 deletions

diff --git a/atrace/Android.bp b/atrace/Android.bp
new file mode 100644
index 00000000..560f47b1
--- /dev/null
+++ b/atrace/Android.bp
@@ -0,0 +1,35 @@
+//
+// Copyright (C) 2019 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.
+
+cc_binary {
+    name: "android.hardware.atrace@1.0-service.pixel",
+    defaults: ["hidl_defaults"],
+    relative_install_path: "hw",
+    vendor: true,
+    init_rc: ["android.hardware.atrace@1.0-service.pixel.rc"],
+    vintf_fragments: ["android.hardware.atrace@1.0-service.pixel.xml"],
+    srcs: [
+        "AtraceDevice.cpp",
+        "service.cpp",
+    ],
+    shared_libs: [
+        "liblog",
+        "libbase",
+        "libutils",
+        "libhidlbase",
+        "libhidltransport",
+        "android.hardware.atrace@1.0",
+    ],
+}
diff --git a/atrace/AtraceDevice.cpp b/atrace/AtraceDevice.cpp
new file mode 100644
index 00000000..ba13cd21
--- /dev/null
+++ b/atrace/AtraceDevice.cpp
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2019 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 <android-base/file.h>
+#include <android-base/logging.h>
+
+#include "AtraceDevice.h"
+
+namespace android {
+namespace hardware {
+namespace atrace {
+namespace V1_0 {
+namespace implementation {
+
+using ::android::hardware::atrace::V1_0::Status;
+using ::android::hardware::atrace::V1_0::TracingCategory;
+
+struct TracingConfig {
+    std::string description;
+    // path and if error on failure
+    std::vector<std::pair<std::string, bool>> paths;
+};
+
+// This is a map stores categories and their sysfs paths with required flags
+const std::map<std::string, TracingConfig> kTracingMap = {
+        {
+                "gfx",
+                {"Graphics",
+                 {{"/sys/kernel/debug/tracing/events/mdss/enable", false},
+                  {"/sys/kernel/debug/tracing/events/sde/enable", false},
+                  {"/sys/kernel/debug/tracing/events/mali_systrace/enable", false}}},
+        },
+        {
+                "ion",
+                {"ION allocation",
+                 {{"/sys/kernel/debug/tracing/events/kmem/ion_alloc_buffer_start/enable", false}}},
+        },
+        {
+                "tz",
+                {"Trust zone",
+                 {{"/sys/kernel/debug/tracing/events/scm/enable", false},
+                  {"/sys/kernel/debug/tracing/events/systrace/enable", false}}},
+        },
+        {
+                "freq",
+                {"Clocks", {{"/sys/kernel/debug/tracing/events/msm_bus/enable", false}}},
+        },
+};
+
+// Methods from ::android::hardware::atrace::V1_0::IAtraceDevice follow.
+Return<void> AtraceDevice::listCategories(listCategories_cb _hidl_cb) {
+    hidl_vec<TracingCategory> categories;
+    categories.resize(kTracingMap.size());
+    std::size_t i = 0;
+    for (auto &c : kTracingMap) {
+        categories[i].name = c.first;
+        categories[i].description = c.second.description;
+        i++;
+    }
+    _hidl_cb(categories);
+    return Void();
+}
+
+Return<::android::hardware::atrace::V1_0::Status> AtraceDevice::enableCategories(
+        const hidl_vec<hidl_string> &categories) {
+    if (!categories.size()) {
+        return Status::ERROR_INVALID_ARGUMENT;
+    }
+    for (auto &c : categories) {
+        if (kTracingMap.count(c)) {
+            for (auto &p : kTracingMap.at(c).paths) {
+                if (!android::base::WriteStringToFile("1", p.first)) {
+                    LOG(ERROR) << "Failed to disable tracing on: " << p.first;
+                    if (p.second) {
+                        // disable before return
+                        disableAllCategories();
+                        return Status::ERROR_TRACING_POINT;
+                    }
+                }
+            }
+        } else {
+            return Status::ERROR_INVALID_ARGUMENT;
+        }
+    }
+    return Status::SUCCESS;
+}
+
+Return<::android::hardware::atrace::V1_0::Status> AtraceDevice::disableAllCategories() {
+    auto ret = Status::SUCCESS;
+    for (auto &c : kTracingMap) {
+        for (auto &p : c.second.paths) {
+            if (!android::base::WriteStringToFile("0", p.first)) {
+                LOG(ERROR) << "Failed to enable tracing on: " << p.first;
+                if (p.second) {
+                    ret = Status::ERROR_TRACING_POINT;
+                }
+            }
+        }
+    }
+    return ret;
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace atrace
+}  // namespace hardware
+}  // namespace android
diff --git a/atrace/AtraceDevice.h b/atrace/AtraceDevice.h
new file mode 100644
index 00000000..a15cd6c5
--- /dev/null
+++ b/atrace/AtraceDevice.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#pragma once
+
+#include <android/hardware/atrace/1.0/IAtraceDevice.h>
+#include <hidl/Status.h>
+
+namespace android {
+namespace hardware {
+namespace atrace {
+namespace V1_0 {
+namespace implementation {
+
+using ::android::sp;
+using ::android::hardware::hidl_array;
+using ::android::hardware::hidl_memory;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+struct AtraceDevice : public IAtraceDevice {
+    // Methods from ::android::hardware::atrace::V1_0::IAtraceDevice follow.
+    Return<void> listCategories(listCategories_cb _hidl_cb) override;
+    Return<::android::hardware::atrace::V1_0::Status> enableCategories(
+            const hidl_vec<hidl_string> &categories) override;
+    Return<::android::hardware::atrace::V1_0::Status> disableAllCategories() override;
+
+    // Methods from ::android::hidl::base::V1_0::IBase follow.
+};
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace atrace
+}  // namespace hardware
+}  // namespace android
diff --git a/atrace/android.hardware.atrace@1.0-service.pixel.rc b/atrace/android.hardware.atrace@1.0-service.pixel.rc
new file mode 100644
index 00000000..ef50fd0a
--- /dev/null
+++ b/atrace/android.hardware.atrace@1.0-service.pixel.rc
@@ -0,0 +1,19 @@
+on late-init
+    # vendor graphics trace points
+    chmod 0666 /sys/kernel/debug/tracing/events/sde/enable
+    chmod 0666 /sys/kernel/debug/tracing/events/mdss/enable
+    chmod 0666 /sys/kernel/debug/tracing/events/mali_systrace/enable
+    # ion allocation trace point
+    chmod 0666 /sys/kernel/debug/tracing/events/kmem/ion_alloc_buffer_start/enable
+    # scm trace point
+    chmod 0666 /sys/kernel/debug/tracing/events/scm/enable
+    # system bus clk trace point
+    chmod 0666 /sys/kernel/debug/tracing/events/msm_bus/enable
+    # legacy systrace point
+    chmod 0666 /sys/kernel/debug/tracing/events/systrace/enable
+
+service vendor.atrace-hal-1-0 /vendor/bin/hw/android.hardware.atrace@1.0-service.pixel
+    interface android.hardware.atrace@1.0::IAtraceDevice default
+    class early_hal
+    user system
+    group system
diff --git a/atrace/android.hardware.atrace@1.0-service.pixel.xml b/atrace/android.hardware.atrace@1.0-service.pixel.xml
new file mode 100644
index 00000000..fd3631ca
--- /dev/null
+++ b/atrace/android.hardware.atrace@1.0-service.pixel.xml
@@ -0,0 +1,11 @@
+<manifest version="1.0" type="device">
+    <hal format="hidl">
+        <name>android.hardware.atrace</name>
+        <transport>hwbinder</transport>
+        <version>1.0</version>
+        <interface>
+            <name>IAtraceDevice</name>
+            <instance>default</instance>
+        </interface>
+    </hal>
+</manifest>
diff --git a/atrace/service.cpp b/atrace/service.cpp
new file mode 100644
index 00000000..423c39d0
--- /dev/null
+++ b/atrace/service.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#define LOG_TAG "android.hardware.atrace@1.0-service.pixel"
+
+#include <hidl/HidlSupport.h>
+#include <hidl/HidlTransportSupport.h>
+
+#include "AtraceDevice.h"
+
+using ::android::OK;
+using ::android::sp;
+using ::android::hardware::configureRpcThreadpool;
+using ::android::hardware::joinRpcThreadpool;
+using ::android::hardware::atrace::V1_0::IAtraceDevice;
+using ::android::hardware::atrace::V1_0::implementation::AtraceDevice;
+
+int main(int /* argc */, char * /* argv */ []) {
+    sp<IAtraceDevice> atrace = new AtraceDevice;
+    configureRpcThreadpool(1, true /* will join */);
+    if (atrace->registerAsService() != OK) {
+        ALOGE("Could not register service.");
+        return 1;
+    }
+    joinRpcThreadpool();
+
+    ALOGE("Service exited!");
+    return 1;
+}