1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #include "faultlogger_service_ohos.h"
16
17 #include <functional>
18 #include <string>
19 #include <vector>
20
21 #include "if_system_ability_manager.h"
22 #include "ipc_skeleton.h"
23 #include "iservice_registry.h"
24 #include "system_ability_definition.h"
25
26 #include "logger.h"
27
28 #include "faultlog_info.h"
29 #include "faultlog_info_ohos.h"
30 #include "faultlog_query_result_inner.h"
31 #include "faultlog_query_result_ohos.h"
32 #include "faultlogger.h"
33
34 DEFINE_LOG_TAG("FaultloggerServiceOhos");
35 namespace OHOS {
36 namespace HiviewDFX {
37 constexpr int32_t UID_SHELL = 2000;
38 constexpr int32_t UID_ROOT = 0;
39 constexpr int32_t UID_HIDUMPER = 1212;
ClearQueryStub(int32_t uid)40 void FaultloggerServiceOhos::ClearQueryStub(int32_t uid)
41 {
42 std::lock_guard<std::mutex> lock(mutex_);
43 queries_.erase(uid);
44 }
45
Dump(int32_t fd,const std::vector<std::u16string> & args)46 int32_t FaultloggerServiceOhos::Dump(int32_t fd, const std::vector<std::u16string> &args)
47 {
48 int32_t uid = IPCSkeleton::GetCallingUid();
49 if ((uid != UID_SHELL) && (uid != UID_ROOT) && (uid != UID_HIDUMPER)) {
50 dprintf(fd, "No permission for uid:%d.\n", uid);
51 return -1;
52 }
53
54 std::vector<std::string> cmdList;
55 std::transform(args.begin(), args.end(), std::back_inserter(cmdList), [](const std::u16string &arg) {
56 std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t> converter;
57 return converter.to_bytes(arg);
58 });
59
60 auto service = GetOrSetFaultlogger();
61 if (service == nullptr) {
62 dprintf(fd, "Service is not ready.\n");
63 return -1;
64 }
65
66 service->Dump(fd, cmdList);
67 return 0;
68 }
69
StartService(OHOS::HiviewDFX::Faultlogger * service)70 void FaultloggerServiceOhos::StartService(OHOS::HiviewDFX::Faultlogger *service)
71 {
72 GetOrSetFaultlogger(service);
73 sptr<ISystemAbilityManager> serviceManager = SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
74 if (serviceManager == nullptr) {
75 HIVIEW_LOGE("Failed to find samgr, exit.");
76 return;
77 }
78
79 static sptr<FaultloggerServiceOhos> instance = new FaultloggerServiceOhos();
80 serviceManager->AddSystemAbility(DFX_FAULT_LOGGER_ABILITY_ID, instance);
81 HIVIEW_LOGI("FaultLogger Service started.");
82 }
83
GetOrSetFaultlogger(OHOS::HiviewDFX::Faultlogger * service)84 OHOS::HiviewDFX::Faultlogger *FaultloggerServiceOhos::GetOrSetFaultlogger(
85 OHOS::HiviewDFX::Faultlogger *service)
86 {
87 static OHOS::HiviewDFX::Faultlogger *ref = nullptr;
88 if (service != nullptr) {
89 ref = service;
90 }
91 return ref;
92 }
93
AddFaultLog(const FaultLogInfoOhos & info)94 void FaultloggerServiceOhos::AddFaultLog(const FaultLogInfoOhos& info)
95 {
96 auto service = GetOrSetFaultlogger();
97 if (service == nullptr) {
98 return;
99 }
100
101 int32_t uid = IPCSkeleton::GetCallingUid();
102 HIVIEW_LOGD("info.uid:%{public}d uid:%{public}d info.pid:%{public}d", info.uid, uid, info.pid);
103 if (((uid != static_cast<int32_t>(getuid()))) && (uid != info.uid)) {
104 HIVIEW_LOGW("Fail to add fault log, mismatch uid:%{public}d(%{public})", uid, info.uid);
105 return;
106 }
107
108 FaultLogInfo outInfo;
109 outInfo.time = info.time;
110 outInfo.id = info.uid;
111 outInfo.pid = info.pid;
112 outInfo.faultLogType = info.faultLogType;
113 outInfo.fd = (info.fd > 0) ? dup(info.fd) : -1;
114 outInfo.module = info.module;
115 outInfo.reason = info.reason;
116 outInfo.summary = info.summary;
117 outInfo.logPath = info.logPath;
118 outInfo.sectionMap = info.sectionMaps;
119 service->AddFaultLog(outInfo);
120 }
121
QuerySelfFaultLog(int32_t faultType,int32_t maxNum)122 sptr<IRemoteObject> FaultloggerServiceOhos::QuerySelfFaultLog(int32_t faultType, int32_t maxNum)
123 {
124 auto service = GetOrSetFaultlogger();
125 if (service == nullptr) {
126 return nullptr;
127 }
128
129 int32_t uid = IPCSkeleton::GetCallingUid();
130 int32_t pid = IPCSkeleton::GetCallingPid();
131 std::lock_guard<std::mutex> lock(mutex_);
132 if ((queries_.find(uid) != queries_.end()) &&
133 (queries_[uid]->pid == pid)) {
134 HIVIEW_LOGW("Ongoing query is still alive for uid:%d", uid);
135 return nullptr;
136 }
137
138 auto queryResult = service->QuerySelfFaultLog(uid, pid, faultType, maxNum);
139 if (queryResult == nullptr) {
140 HIVIEW_LOGW("Fail to query fault log for uid:%d", uid);
141 return nullptr;
142 }
143
144 sptr<FaultLogQueryResultOhos> resultRef =
145 new FaultLogQueryResultOhos(std::move(queryResult));
146 auto queryStub = std::make_unique<FaultLogQuery>();
147 queryStub->pid = pid;
148 queryStub->ptr = resultRef;
149 queries_[uid] = std::move(queryStub);
150 return resultRef->AsObject();
151 }
152
Destroy()153 void FaultloggerServiceOhos::Destroy()
154 {
155 auto service = GetOrSetFaultlogger();
156 if (service == nullptr) {
157 return;
158 }
159
160 int32_t uid = IPCSkeleton::GetCallingUid();
161 HIVIEW_LOGI("Destroy Query from uid:%d", uid);
162 ClearQueryStub(uid);
163 }
164 } // namespace HiviewDFX
165 } // namespace OHOS