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Merge changes from topic "native_bridge_for_app_zygote"

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* changes:
  Zygote: support native-bridge for app-zygote
  AppZygote: start with the correct instruction set
This commit is contained in:
Lev Rumyantsev
2020-01-21 23:09:34 +00:00
committed by Gerrit Code Review
parent 7826c2f43e 2b7a5ea3ba
commit 5f30976b8c
2 changed files with 18 additions and 21 deletions
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4
core/java/android/os/AppZygote.java
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@@ -21,6 +21,8 @@ import android.util.Log;
import com.android.internal.annotations.GuardedBy;
import dalvik.system.VMRuntime;
/**
* AppZygote is responsible for interfacing with an application-specific zygote.
*
@@ -113,7 +115,7 @@ public class AppZygote {
"app_zygote", // seInfo
abi, // abi
abi, // acceptedAbiList
null, // instructionSet
VMRuntime.getInstructionSet(abi), // instructionSet
mZygoteUidGidMin,
mZygoteUidGidMax);

35
core/jni/com_android_internal_os_Zygote.cpp
View File

@@ -1063,22 +1063,16 @@ static void SpecializeCommon(JNIEnv* env, uid_t uid, gid_t gid, jintArray gids,
DropCapabilitiesBoundingSet(fail_fn);
bool use_native_bridge = !is_system_server &&
instruction_set.has_value() &&
android::NativeBridgeAvailable() &&
android::NeedsNativeBridge(instruction_set.value().c_str());
bool need_pre_initialize_native_bridge =
!is_system_server &&
instruction_set.has_value() &&
android::NativeBridgeAvailable() &&
// Native bridge may be already initialized if this
// is an app forked from app-zygote.
!android::NativeBridgeInitialized() &&
android::NeedsNativeBridge(instruction_set.value().c_str());
if (use_native_bridge && !app_data_dir.has_value()) {
// The app_data_dir variable should never be empty if we need to use a
// native bridge. In general, app_data_dir will never be empty for normal
// applications. It can only happen in special cases (for isolated
// processes which are not associated with any app). These are launched by
// the framework and should not be emulated anyway.
use_native_bridge = false;
ALOGW("Native bridge will not be used because managed_app_data_dir == nullptr.");
}
MountEmulatedStorage(uid, mount_external, use_native_bridge, fail_fn);
MountEmulatedStorage(uid, mount_external, need_pre_initialize_native_bridge, fail_fn);
// If this zygote isn't root, it won't be able to create a process group,
// since the directory is owned by root.
@@ -1094,11 +1088,12 @@ static void SpecializeCommon(JNIEnv* env, uid_t uid, gid_t gid, jintArray gids,
SetGids(env, gids, fail_fn);
SetRLimits(env, rlimits, fail_fn);
if (use_native_bridge) {
// Due to the logic behind use_native_bridge we know that both app_data_dir
// and instruction_set contain values.
android::PreInitializeNativeBridge(app_data_dir.value().c_str(),
instruction_set.value().c_str());
if (need_pre_initialize_native_bridge) {
// Due to the logic behind need_pre_initialize_native_bridge we know that
// instruction_set contains a value.
android::PreInitializeNativeBridge(
app_data_dir.has_value() ? app_data_dir.value().c_str() : nullptr,
instruction_set.value().c_str());
}
if (setresgid(gid, gid, gid) == -1) {