1 /*
2 * Copyright 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 //#define LOG_NDEBUG 1
18 #define LOG_TAG "GraphicsEnv"
19 #include <graphicsenv/GraphicsEnv.h>
20
21 #include <mutex>
22
23 #include <android/dlext.h>
24 #include <log/log.h>
25
26 // TODO(b/37049319) Get this from a header once one exists
27 extern "C" {
28 android_namespace_t* android_get_exported_namespace(const char*);
29 android_namespace_t* android_create_namespace(const char* name,
30 const char* ld_library_path,
31 const char* default_library_path,
32 uint64_t type,
33 const char* permitted_when_isolated_path,
34 android_namespace_t* parent);
35
36 enum {
37 ANDROID_NAMESPACE_TYPE_ISOLATED = 1,
38 ANDROID_NAMESPACE_TYPE_SHARED = 2,
39 };
40 }
41
42 namespace android {
43
getInstance()44 /*static*/ GraphicsEnv& GraphicsEnv::getInstance() {
45 static GraphicsEnv env;
46 return env;
47 }
48
setDriverPath(const std::string path)49 void GraphicsEnv::setDriverPath(const std::string path) {
50 if (!mDriverPath.empty()) {
51 ALOGV("ignoring attempt to change driver path from '%s' to '%s'",
52 mDriverPath.c_str(), path.c_str());
53 return;
54 }
55 ALOGV("setting driver path to '%s'", path.c_str());
56 mDriverPath = path;
57 }
58
setLayerPaths(android_namespace_t * appNamespace,const std::string layerPaths)59 void GraphicsEnv::setLayerPaths(android_namespace_t* appNamespace, const std::string layerPaths) {
60 if (mLayerPaths.empty()) {
61 mLayerPaths = layerPaths;
62 mAppNamespace = appNamespace;
63 } else {
64 ALOGV("Vulkan layer search path already set, not clobbering with '%s' for namespace %p'",
65 layerPaths.c_str(), appNamespace);
66 }
67 }
68
getAppNamespace()69 android_namespace_t* GraphicsEnv::getAppNamespace() {
70 return mAppNamespace;
71 }
72
getLayerPaths()73 const std::string GraphicsEnv::getLayerPaths(){
74 return mLayerPaths;
75 }
76
getDebugLayers()77 const std::string GraphicsEnv::getDebugLayers() {
78 return mDebugLayers;
79 }
80
setDebugLayers(const std::string layers)81 void GraphicsEnv::setDebugLayers(const std::string layers) {
82 mDebugLayers = layers;
83 }
84
getDriverNamespace()85 android_namespace_t* GraphicsEnv::getDriverNamespace() {
86 static std::once_flag once;
87 std::call_once(once, [this]() {
88 if (mDriverPath.empty())
89 return;
90 // If the sphal namespace isn't configured for a device, don't support updatable drivers.
91 // We need a parent namespace to inherit the default search path from.
92 auto sphalNamespace = android_get_exported_namespace("sphal");
93 if (!sphalNamespace) return;
94 mDriverNamespace = android_create_namespace("gfx driver",
95 nullptr, // ld_library_path
96 mDriverPath.c_str(), // default_library_path
97 ANDROID_NAMESPACE_TYPE_SHARED |
98 ANDROID_NAMESPACE_TYPE_ISOLATED,
99 nullptr, // permitted_when_isolated_path
100 sphalNamespace);
101 });
102 return mDriverNamespace;
103 }
104
105 } // namespace android
106
android_getDriverNamespace()107 extern "C" android_namespace_t* android_getDriverNamespace() {
108 return android::GraphicsEnv::getInstance().getDriverNamespace();
109 }
110