1 /*
2 **
3 ** Copyright 2008, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 ** http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17
18 //#define LOG_NDEBUG 0
19 #define LOG_TAG "main_extractorservice"
20
21 #include <fcntl.h>
22 #include <sys/prctl.h>
23 #include <sys/wait.h>
24 #include <binder/IPCThreadState.h>
25 #include <binder/ProcessState.h>
26 #include <binder/IServiceManager.h>
27 #include <mediautils/LimitProcessMemory.h>
28 #include <string>
29
30 #include <android-base/logging.h>
31 #include <android-base/properties.h>
32 #include <utils/Log.h>
33 #include <utils/misc.h>
34
35 // from LOCAL_C_INCLUDES
36 #include "MediaExtractorService.h"
37 #include "minijail.h"
38
39 using namespace android;
40
41 static const char kSystemSeccompPolicyPath[] =
42 "/apex/com.android.media/etc/seccomp_policy/mediaextractor.policy";
43 static const char kVendorSeccompPolicyPath[] =
44 "/vendor/etc/seccomp_policy/mediaextractor.policy";
45
main(int argc __unused,char ** argv)46 int main(int argc __unused, char** argv)
47 {
48
49 #if __has_feature(hwaddress_sanitizer)
50 ALOGI("disable media.extractor memory limits (hwasan enabled)");
51 #else
52 ALOGI("enable media.extractor memory limits");
53 limitProcessMemory(
54 "ro.media.maxmem", /* property that defines limit */
55 SIZE_MAX, /* upper limit in bytes */
56 20 /* upper limit as percentage of physical RAM */);
57 #endif
58
59 signal(SIGPIPE, SIG_IGN);
60
61 //b/62255959: this forces libutis.so to dlopen vendor version of libutils.so
62 //before minijail is on. This is dirty but required since some syscalls such
63 //as pread64 are used by linker but aren't allowed in the minijail. By
64 //calling the function before entering minijail, we can force dlopen.
65 android::report_sysprop_change();
66
67 SetUpMinijail(kSystemSeccompPolicyPath, kVendorSeccompPolicyPath);
68
69 strcpy(argv[0], "media.extractor");
70 sp<ProcessState> proc(ProcessState::self());
71 sp<IServiceManager> sm = defaultServiceManager();
72 MediaExtractorService::instantiate();
73
74 ProcessState::self()->startThreadPool();
75 IPCThreadState::self()->joinThreadPool();
76 }
77