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Merge "Add post fork hook for System Server"

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am: f2a342b3ab

Change-Id: Icbc2f2b319be183c638ab09116d6550fff89dee9
This commit is contained in:
Orion Hodson
2018-10-31 07:51:44 -07:00
committed by android-build-merger
parent d62c2baa6d f2a342b3ab
commit a58c2a07c1
2 changed files with 21 additions and 0 deletions
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5
core/java/com/android/internal/os/Zygote.java
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@@ -211,6 +211,11 @@ public final class Zygote {
*/
native protected static void nativeUnmountStorageOnInit();
private static void callPostForkSystemServerHooks() {
// SystemServer specific post fork hooks run before child post fork hooks.
VM_HOOKS.postForkSystemServer();
}
private static void callPostForkChildHooks(int runtimeFlags, boolean isSystemServer,
boolean isZygote, String instructionSet) {
VM_HOOKS.postForkChild(runtimeFlags, isSystemServer, isZygote, instructionSet);

16
core/jni/com_android_internal_os_Zygote.cpp
View File

@@ -81,6 +81,7 @@ static pid_t gSystemServerPid = 0;
static const char kZygoteClassName[] = "com/android/internal/os/Zygote";
static jclass gZygoteClass;
static jmethodID gCallPostForkSystemServerHooks;
static jmethodID gCallPostForkChildHooks;
static bool g_is_security_enforced = true;
@@ -728,6 +729,18 @@ static void SpecializeCommon(JNIEnv* env, uid_t uid, gid_t gid, jintArray javaGi
// Unset the SIGCHLD handler, but keep ignoring SIGHUP (rationale in SetSignalHandlers).
UnsetChldSignalHandler();
if (is_system_server) {
env->CallStaticVoidMethod(gZygoteClass, gCallPostForkSystemServerHooks);
if (env->ExceptionCheck()) {
fail_fn("Error calling post fork system server hooks.");
}
// TODO(oth): Remove hardcoded label here (b/117874058).
static const char* kSystemServerLabel = "u:r:system_server:s0";
if (selinux_android_setcon(kSystemServerLabel) != 0) {
fail_fn(CREATE_ERROR("selinux_android_setcon(%s)", kSystemServerLabel));
}
}
env->CallStaticVoidMethod(gZygoteClass, gCallPostForkChildHooks, runtime_flags,
is_system_server, is_child_zygote, instructionSet);
if (env->ExceptionCheck()) {
@@ -1020,6 +1033,9 @@ static const JNINativeMethod gMethods[] = {
int register_com_android_internal_os_Zygote(JNIEnv* env) {
gZygoteClass = MakeGlobalRefOrDie(env, FindClassOrDie(env, kZygoteClassName));
gCallPostForkSystemServerHooks = GetStaticMethodIDOrDie(env, gZygoteClass,
"callPostForkSystemServerHooks",
"()V");
gCallPostForkChildHooks = GetStaticMethodIDOrDie(env, gZygoteClass, "callPostForkChildHooks",
"(IZZLjava/lang/String;)V");