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      1 /*
      2  * Copyright (C) 2018 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 #include <set>
     17 
     18 #include <android-base/file.h>
     19 #include <android-base/stringprintf.h>
     20 #include <android/hidl/manager/1.0/IServiceManager.h>
     21 #include <dumputils/dump_utils.h>
     22 #include <log/log.h>
     23 
     24 /* list of native processes to include in the native dumps */
     25 // This matches the /proc/pid/exe link instead of /proc/pid/cmdline.
     26 static const char* native_processes_to_dump[] = {
     27         "/system/bin/audioserver",
     28         "/system/bin/cameraserver",
     29         "/system/bin/drmserver",
     30         "/system/bin/mediadrmserver",
     31         "/system/bin/mediaextractor", // media.extractor
     32         "/system/bin/mediametrics", // media.metrics
     33         "/system/bin/mediaserver",
     34         "/system/bin/netd",
     35         "/system/bin/vold",
     36         "/system/bin/sdcard",
     37         "/system/bin/statsd",
     38         "/system/bin/surfaceflinger",
     39         "/system/bin/vehicle_network_service",
     40         "/vendor/bin/hw/android.hardware.media.omx@1.0-service", // media.codec
     41         "/apex/com.android.media.swcodec/bin/mediaswcodec", // media.swcodec
     42         NULL,
     43 };
     44 
     45 /* list of hal interface to dump containing process during native dumps */
     46 static const char* hal_interfaces_to_dump[] {
     47         "android.hardware.audio (at) 2.0::IDevicesFactory",
     48         "android.hardware.audio (at) 4.0::IDevicesFactory",
     49         "android.hardware.bluetooth (at) 1.0::IBluetoothHci",
     50         "android.hardware.camera.provider (at) 2.4::ICameraProvider",
     51         "android.hardware.drm (at) 1.0::IDrmFactory",
     52         "android.hardware.graphics.allocator (at) 2.0::IAllocator",
     53         "android.hardware.graphics.composer (at) 2.1::IComposer",
     54         "android.hardware.health (at) 2.0::IHealth",
     55         "android.hardware.media.c2 (at) 1.0::IComponentStore",
     56         "android.hardware.media.omx (at) 1.0::IOmx",
     57         "android.hardware.media.omx (at) 1.0::IOmxStore",
     58         "android.hardware.power (at) 1.3::IPower",
     59         "android.hardware.power.stats (at) 1.0::IPowerStats",
     60         "android.hardware.sensors (at) 1.0::ISensors",
     61         "android.hardware.thermal (at) 2.0::IThermal",
     62         "android.hardware.vr (at) 1.0::IVr",
     63         NULL,
     64 };
     65 
     66 bool should_dump_hal_interface(const char* interface) {
     67     for (const char** i = hal_interfaces_to_dump; *i; i++) {
     68         if (!strcmp(*i, interface)) {
     69             return true;
     70         }
     71     }
     72     return false;
     73 }
     74 
     75 bool should_dump_native_traces(const char* path) {
     76     for (const char** p = native_processes_to_dump; *p; p++) {
     77         if (!strcmp(*p, path)) {
     78             return true;
     79         }
     80     }
     81     return false;
     82 }
     83 
     84 std::set<int> get_interesting_hal_pids() {
     85     using android::hidl::manager::V1_0::IServiceManager;
     86     using android::sp;
     87     using android::hardware::Return;
     88 
     89     sp<IServiceManager> manager = IServiceManager::getService();
     90     std::set<int> pids;
     91 
     92     Return<void> ret = manager->debugDump([&](auto& hals) {
     93         for (const auto &info : hals) {
     94             if (info.pid == static_cast<int>(IServiceManager::PidConstant::NO_PID)) {
     95                 continue;
     96             }
     97 
     98             if (!should_dump_hal_interface(info.interfaceName.c_str())) {
     99                 continue;
    100             }
    101 
    102             pids.insert(info.pid);
    103         }
    104     });
    105 
    106     if (!ret.isOk()) {
    107         ALOGE("Could not get list of HAL PIDs: %s\n", ret.description().c_str());
    108     }
    109 
    110     return pids; // whether it was okay or not
    111 }
    112 
    113 bool IsZygote(int pid) {
    114     std::string cmdline;
    115     if (!android::base::ReadFileToString(android::base::StringPrintf("/proc/%d/cmdline", pid),
    116                                          &cmdline)) {
    117         return true;
    118     }
    119 
    120     // cmdline has embedded nulls; only consider argv[0].
    121     cmdline = std::string(cmdline.c_str());
    122 
    123     return cmdline == "zygote" || cmdline == "zygote64" || cmdline == "usap32" ||
    124             cmdline == "usap64";
    125 }
    126