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/*
* Copyright (C) 2021 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 "MemtrackProxy.h"
#include <android-base/logging.h>
#include <android/binder_manager.h>
#include <private/android_filesystem_config.h>
using ::android::hardware::hidl_vec;
using ::android::hardware::Return;
namespace aidl {
namespace android {
namespace hardware {
namespace memtrack {
// Check Memtrack Flags
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackFlag::SMAPS_ACCOUNTED) ==
static_cast<uint32_t>(V1_aidl::MemtrackRecord::FLAG_SMAPS_ACCOUNTED));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackFlag::SMAPS_UNACCOUNTED) ==
static_cast<uint32_t>(V1_aidl::MemtrackRecord::FLAG_SMAPS_UNACCOUNTED));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackFlag::SHARED) ==
static_cast<uint32_t>(V1_aidl::MemtrackRecord::FLAG_SHARED));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackFlag::SHARED_PSS) ==
static_cast<uint32_t>(V1_aidl::MemtrackRecord::FLAG_SHARED_PSS));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackFlag::PRIVATE) ==
static_cast<uint32_t>(V1_aidl::MemtrackRecord::FLAG_PRIVATE));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackFlag::SYSTEM) ==
static_cast<uint32_t>(V1_aidl::MemtrackRecord::FLAG_SYSTEM));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackFlag::DEDICATED) ==
static_cast<uint32_t>(V1_aidl::MemtrackRecord::FLAG_DEDICATED));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackFlag::NONSECURE) ==
static_cast<uint32_t>(V1_aidl::MemtrackRecord::FLAG_NONSECURE));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackFlag::SECURE) ==
static_cast<uint32_t>(V1_aidl::MemtrackRecord::FLAG_SECURE));
// Check Memtrack Types
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackType::OTHER) ==
static_cast<uint32_t>(V1_aidl::MemtrackType::OTHER));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackType::GL) ==
static_cast<uint32_t>(V1_aidl::MemtrackType::GL));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackType::GRAPHICS) ==
static_cast<uint32_t>(V1_aidl::MemtrackType::GRAPHICS));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackType::MULTIMEDIA) ==
static_cast<uint32_t>(V1_aidl::MemtrackType::MULTIMEDIA));
static_assert(static_cast<uint32_t>(V1_0_hidl::MemtrackType::CAMERA) ==
static_cast<uint32_t>(V1_aidl::MemtrackType::CAMERA));
__attribute__((warn_unused_result)) bool translate(const V1_0_hidl::MemtrackRecord& in,
V1_aidl::MemtrackRecord* out) {
// Convert uint64_t to int64_t (long in AIDL). AIDL doesn't support unsigned types.
if (in.sizeInBytes > std::numeric_limits<int64_t>::max() || in.sizeInBytes < 0) {
return false;
}
out->sizeInBytes = static_cast<int64_t>(in.sizeInBytes);
// It's ok to just assign directly, since this is a bitmap.
out->flags = in.flags;
return true;
}
sp<V1_0_hidl::IMemtrack> MemtrackProxy::MemtrackHidlInstance() {
return V1_0_hidl::IMemtrack::getService();
}
std::shared_ptr<V1_aidl::IMemtrack> MemtrackProxy::MemtrackAidlInstance() {
const auto instance = std::string() + V1_aidl::IMemtrack::descriptor + "/default";
bool declared = AServiceManager_isDeclared(instance.c_str());
if (!declared) {
return nullptr;
}
ndk::SpAIBinder memtrack_binder =
ndk::SpAIBinder(AServiceManager_waitForService(instance.c_str()));
return V1_aidl::IMemtrack::fromBinder(memtrack_binder);
}
bool MemtrackProxy::CheckUid(uid_t calling_uid) {
// Allow AID_SHELL for adb shell dumpsys meminfo
return calling_uid == AID_SYSTEM || calling_uid == AID_ROOT || calling_uid == AID_SHELL;
}
bool MemtrackProxy::CheckPid(pid_t calling_pid, pid_t request_pid) {
return calling_pid == request_pid;
}
MemtrackProxy::MemtrackProxy() {
memtrack_aidl_instance_ = MemtrackProxy::MemtrackAidlInstance();
// Only check for a HIDL implementation if we failed to get the AIDL service
if (!memtrack_aidl_instance_) {
memtrack_hidl_instance_ = MemtrackProxy::MemtrackHidlInstance();
}
}
ndk::ScopedAStatus MemtrackProxy::getMemory(int pid, MemtrackType type,
std::vector<MemtrackRecord>* _aidl_return) {
if (pid < 0) {
return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
}
if (!MemtrackProxy::CheckPid(AIBinder_getCallingPid(), pid) &&
!MemtrackProxy::CheckUid(AIBinder_getCallingUid())) {
return ndk::ScopedAStatus::fromExceptionCodeWithMessage(
EX_SECURITY,
"Only AID_ROOT, AID_SYSTEM and AID_SHELL can request getMemory() for PIDs other "
"than the calling PID");
}
if (type != MemtrackType::OTHER && type != MemtrackType::GL && type != MemtrackType::GRAPHICS &&
type != MemtrackType::MULTIMEDIA && type != MemtrackType::CAMERA) {
return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
}
_aidl_return->clear();
if (memtrack_aidl_instance_) {
return memtrack_aidl_instance_->getMemory(pid, type, _aidl_return);
} else if (memtrack_hidl_instance_) {
ndk::ScopedAStatus aidl_status;
Return<void> ret = memtrack_hidl_instance_->getMemory(
pid, static_cast<V1_0_hidl::MemtrackType>(type),
[&_aidl_return, &aidl_status](V1_0_hidl::MemtrackStatus status,
hidl_vec<V1_0_hidl::MemtrackRecord> records) {
switch (status) {
case V1_0_hidl::MemtrackStatus::SUCCESS:
aidl_status = ndk::ScopedAStatus::ok();
break;
case V1_0_hidl::MemtrackStatus::MEMORY_TRACKING_NOT_SUPPORTED:
[[fallthrough]];
case V1_0_hidl::MemtrackStatus::TYPE_NOT_SUPPORTED:
[[fallthrough]];
default:
aidl_status =
ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
return;
}
_aidl_return->resize(records.size());
for (size_t i = 0; i < records.size(); i++) {
if (!translate(records[i], &(*_aidl_return)[i])) {
aidl_status = ndk::ScopedAStatus::fromExceptionCodeWithMessage(
EX_SERVICE_SPECIFIC,
"Failed to convert HIDL MemtrackRecord to AIDL");
return;
}
}
});
// Check HIDL return
if (!ret.isOk()) {
const char* err_msg = "HIDL Memtrack::getMemory() failed";
aidl_status =
ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_SERVICE_SPECIFIC, err_msg);
LOG(ERROR) << err_msg << ": " << ret.description();
}
return aidl_status;
}
return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_NULL_POINTER,
"Memtrack HAL service not available");
}
ndk::ScopedAStatus MemtrackProxy::getGpuDeviceInfo(std::vector<DeviceInfo>* _aidl_return) {
if (!MemtrackProxy::CheckUid(AIBinder_getCallingUid())) {
return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_SECURITY,
"Only AID_ROOT, AID_SYSTEM and AID_SHELL can request getGpuDeviceInfo()");
}
_aidl_return->clear();
if (memtrack_aidl_instance_ ||
(memtrack_aidl_instance_ = MemtrackProxy::MemtrackAidlInstance())) {
return memtrack_aidl_instance_->getGpuDeviceInfo(_aidl_return);
}
return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_NULL_POINTER,
"Memtrack HAL service not available");
}
} // namespace memtrack
} // namespace hardware
} // namespace android
} // namespace aidl
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