1 /*
2 * Copyright (c) 2024 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
16 #include "appspawn_server.h"
17
18 #undef _GNU_SOURCE
19 #define _GNU_SOURCE
20 #include <sched.h>
21 #include <signal.h>
22 #include <time.h>
23
24 #include "appspawn_trace.h"
25 #include "appspawn_utils.h"
26 #ifndef OHOS_LITE
27 #include "appspawn_manager.h"
28 #endif
29
30 #define MAX_FORK_TIME (30 * 1000) // 30ms
31
NotifyResToParent(struct AppSpawnContent * content,AppSpawnClient * client,int result)32 static void NotifyResToParent(struct AppSpawnContent *content, AppSpawnClient *client, int result)
33 {
34 APPSPAWN_LOGI("NotifyResToParent: %{public}d", result);
35 if (content->notifyResToParent != NULL) {
36 content->notifyResToParent(content, client, result);
37 }
38 }
39
ProcessExit(int code)40 void ProcessExit(int code)
41 {
42 APPSPAWN_LOGI("App exit code: %{public}d", code);
43 #ifdef OHOS_LITE
44 _exit(0x7f); // 0x7f user exit
45 #else
46 quick_exit(0);
47 #endif
48 }
49
50 #ifdef APPSPAWN_HELPER
51 __attribute__((visibility("default")))
52 _Noreturn
exit(int code)53 void exit(int code)
54 {
55 char *checkExit = getenv(APPSPAWN_CHECK_EXIT);
56 if (checkExit && atoi(checkExit) == getpid()) {
57 APPSPAWN_LOGF("Unexpected call: exit(%{public}d)", code);
58 abort();
59 }
60 // hook `exit` to `ProcessExit` to ensure app exit in a clean way
61 ProcessExit(code);
62 // should not come here
63 abort();
64 }
65 #endif
66
67 #ifdef USE_ENCAPS
68 #include <sys/ioctl.h>
69
70 #define OH_ENCAPS_PROC_TYPE_BASE 0x18
71 #define OH_ENCAPS_MAGIC 'E'
72 #define OH_PROC_APP 4
73 #define SET_PROC_TYPE_CMD _IOW(OH_ENCAPS_MAGIC, OH_ENCAPS_PROC_TYPE_BASE, uint32_t)
74
SetEncapsFlag()75 static void SetEncapsFlag()
76 {
77 uint32_t flag = OH_PROC_APP;
78 int fdEncaps = open("/dev/encaps", O_RDWR);
79 if (fdEncaps < 0) {
80 APPSPAWN_LOGE("AppSpawnChild open encaps failed");
81 return;
82 }
83 int ret = ioctl(fdEncaps, SET_PROC_TYPE_CMD, &flag);
84 if (ret != 0) {
85 APPSPAWN_LOGE("AppSpawnChild SetEncapsFlag failed");
86 }
87 close(fdEncaps);
88 }
89 #endif
90
AppSpawnChild(AppSpawnContent * content,AppSpawnClient * client)91 int AppSpawnChild(AppSpawnContent *content, AppSpawnClient *client)
92 {
93 APPSPAWN_CHECK(content != NULL && client != NULL, return -1, "Invalid arg for appspawn child");
94 APPSPAWN_LOGI("AppSpawnChild id %{public}u flags: 0x%{public}x", client->id, client->flags);
95 StartAppspawnTrace("AppSpawnExecuteClearEnvHook");
96 int ret = AppSpawnExecuteClearEnvHook(content, client);
97 FinishAppspawnTrace();
98 APPSPAWN_CHECK_ONLY_EXPER(ret == 0,
99 NotifyResToParent(content, client, ret);
100 AppSpawnEnvClear(content, client);
101 return 0);
102
103 if (client->flags & APP_COLD_START) {
104 // cold start fail, to start normal
105 if (content->coldStartApp != NULL && content->coldStartApp(content, client) == 0) {
106 return 0;
107 }
108 APPSPAWN_LOGW("AppSpawnChild cold start fail %{public}u", client->id);
109 }
110 #ifdef USE_ENCAPS
111 SetEncapsFlag();
112 #endif
113 StartAppspawnTrace("AppSpawnExecuteSpawningHook");
114 ret = AppSpawnExecuteSpawningHook(content, client);
115 FinishAppspawnTrace();
116 APPSPAWN_CHECK_ONLY_EXPER(ret == 0,
117 NotifyResToParent(content, client, ret);
118 AppSpawnEnvClear(content, client);
119 return 0);
120 StartAppspawnTrace("AppSpawnExecutePreReplyHook");
121 ret = AppSpawnExecutePreReplyHook(content, client);
122 FinishAppspawnTrace();
123 APPSPAWN_CHECK_ONLY_EXPER(ret == 0,
124 NotifyResToParent(content, client, ret);
125 AppSpawnEnvClear(content, client);
126 return 0);
127
128 // notify success to father process and start app process
129 StartAppspawnTrace("NotifyResToParent");
130 NotifyResToParent(content, client, 0);
131 FinishAppspawnTrace();
132
133 StartAppspawnTrace("AppSpawnExecutePostReplyHook");
134 (void)AppSpawnExecutePostReplyHook(content, client);
135 FinishAppspawnTrace();
136
137 if (content->runChildProcessor != NULL) {
138 ret = content->runChildProcessor(content, client);
139 }
140 if (ret != 0) {
141 AppSpawnEnvClear(content, client);
142 }
143 return 0;
144 }
145
CloneAppSpawn(void * arg)146 static int CloneAppSpawn(void *arg)
147 {
148 APPSPAWN_CHECK(arg != NULL, return -1, "Invalid content for appspawn");
149 AppSpawnForkArg *forkArg = (AppSpawnForkArg *)arg;
150 ProcessExit(AppSpawnChild(forkArg->content, forkArg->client));
151 return 0;
152 }
153
154 #ifndef OHOS_LITE
NwebSpawnCloneChildProcess(AppSpawnContent * content,AppSpawnClient * client,pid_t * pid)155 static void NwebSpawnCloneChildProcess(AppSpawnContent *content, AppSpawnClient *client, pid_t *pid)
156 {
157 AppSpawnForkArg arg;
158 arg.client = client;
159 arg.content = content;
160 #ifndef APPSPAWN_TEST
161 AppSpawningCtx *property = (AppSpawningCtx *)client;
162 uint32_t len = 0;
163 char *processType = (char *)(GetAppSpawnMsgExtInfo(property->message, MSG_EXT_NAME_PROCESS_TYPE, &len));
164 APPSPAWN_CHECK(processType != NULL, return, "Invalid processType data");
165
166 if (strcmp(processType, "gpu") == 0) {
167 *pid = clone(CloneAppSpawn, NULL, CLONE_NEWNET | SIGCHLD, (void *)&arg);
168 } else {
169 *pid = clone(CloneAppSpawn, NULL, content->sandboxNsFlags | SIGCHLD, (void *)&arg);
170 }
171 #else
172 *pid = clone(CloneAppSpawn, NULL, content->sandboxNsFlags | SIGCHLD, (void *)&arg);
173 #endif
174 }
175 #endif
176
AppSpawnForkChildProcess(AppSpawnContent * content,AppSpawnClient * client,pid_t * pid)177 static void AppSpawnForkChildProcess(AppSpawnContent *content, AppSpawnClient *client, pid_t *pid)
178 {
179 struct timespec forkStart = {0};
180 clock_gettime(CLOCK_MONOTONIC, &forkStart);
181 StartAppspawnTrace("AppspawnForkStart");
182 *pid = fork();
183 if (*pid == 0) {
184 struct timespec forkEnd = {0};
185 clock_gettime(CLOCK_MONOTONIC, &forkEnd);
186 uint64_t diff = DiffTime(&forkStart, &forkEnd);
187 APPSPAWN_CHECK_ONLY_LOG(diff < MAX_FORK_TIME, "fork time %{public}" PRId64 " us", diff);
188 ProcessExit(AppSpawnChild(content, client));
189 } else {
190 FinishAppspawnTrace();
191 }
192 }
193
AppSpawnProcessMsg(AppSpawnContent * content,AppSpawnClient * client,pid_t * childPid)194 int AppSpawnProcessMsg(AppSpawnContent *content, AppSpawnClient *client, pid_t *childPid)
195 {
196 APPSPAWN_CHECK(content != NULL, return -1, "Invalid content for appspawn");
197 APPSPAWN_CHECK(client != NULL && childPid != NULL, return -1, "Invalid client for appspawn");
198 APPSPAWN_LOGI("AppSpawnProcessMsg id: %{public}d mode: %{public}d sandboxNsFlags: 0x%{public}x",
199 client->id, content->mode, content->sandboxNsFlags);
200
201 pid_t pid = 0;
202 #ifndef OHOS_LITE
203 if (content->mode == MODE_FOR_NWEB_SPAWN) {
204 NwebSpawnCloneChildProcess(content, client, &pid);
205 } else {
206 #else
207 {
208 #endif
209 AppSpawnForkChildProcess(content, client, &pid);
210 }
211 APPSPAWN_CHECK(pid >= 0, return APPSPAWN_FORK_FAIL, "fork child process error: %{public}d", errno);
212 *childPid = pid;
213 return 0;
214 }
215