Revert "Revert "Binder Record/Replay implemented in BBinder""
This reverts commit c6c68e30955192e0559a73ed0800d7f5b5e88ce2.
Reason for revert: Fixed build issue
Test: atest aidl_integration_test
Bug: 245596867
Change-Id: I8eba80e46689636e530edbe9e235ab58029c4649
diff --git a/libs/binder/Binder.cpp b/libs/binder/Binder.cpp
index 4029957..481d704 100644
--- a/libs/binder/Binder.cpp
+++ b/libs/binder/Binder.cpp
@@ -21,6 +21,7 @@
#include <android-base/logging.h>
#include <android-base/unique_fd.h>
+#include <binder/BinderRecordReplay.h>
#include <binder/BpBinder.h>
#include <binder/IInterface.h>
#include <binder/IPCThreadState.h>
@@ -28,7 +29,9 @@
#include <binder/IShellCallback.h>
#include <binder/Parcel.h>
#include <binder/RpcServer.h>
+#include <cutils/compiler.h>
#include <private/android_filesystem_config.h>
+#include <pthread.h>
#include <utils/misc.h>
#include <inttypes.h>
@@ -60,6 +63,12 @@
bool kEnableRpcDevServers = false;
#endif
+#ifdef BINDER_ENABLE_RECORDING
+bool kEnableRecording = true;
+#else
+bool kEnableRecording = false;
+#endif
+
// Log any reply transactions for which the data exceeds this size
#define LOG_REPLIES_OVER_SIZE (300 * 1024)
// ---------------------------------------------------------------------------
@@ -265,11 +274,13 @@
Mutex mLock;
std::set<sp<RpcServerLink>> mRpcServerLinks;
BpBinder::ObjectManager mObjects;
+
+ android::base::unique_fd mRecordingFd;
};
// ---------------------------------------------------------------------------
-BBinder::BBinder() : mExtras(nullptr), mStability(0), mParceled(false) {}
+BBinder::BBinder() : mExtras(nullptr), mStability(0), mParceled(false), mRecordingOn(false) {}
bool BBinder::isBinderAlive() const
{
@@ -281,6 +292,63 @@
return NO_ERROR;
}
+status_t BBinder::startRecordingTransactions(const Parcel& data) {
+ if (!kEnableRecording) {
+ ALOGW("Binder recording disallowed because recording is not enabled");
+ return INVALID_OPERATION;
+ }
+ if (!kEnableKernelIpc) {
+ ALOGW("Binder recording disallowed because kernel binder is not enabled");
+ return INVALID_OPERATION;
+ }
+ uid_t uid = IPCThreadState::self()->getCallingUid();
+ if (uid != AID_ROOT) {
+ ALOGE("Binder recording not allowed because client %" PRIu32 " is not root", uid);
+ return PERMISSION_DENIED;
+ }
+ Extras* e = getOrCreateExtras();
+ AutoMutex lock(e->mLock);
+ if (mRecordingOn) {
+ LOG(INFO) << "Could not start Binder recording. Another is already in progress.";
+ return INVALID_OPERATION;
+ } else {
+ status_t readStatus = data.readUniqueFileDescriptor(&(e->mRecordingFd));
+ if (readStatus != OK) {
+ return readStatus;
+ }
+ mRecordingOn = true;
+ LOG(INFO) << "Started Binder recording.";
+ return NO_ERROR;
+ }
+}
+
+status_t BBinder::stopRecordingTransactions() {
+ if (!kEnableRecording) {
+ ALOGW("Binder recording disallowed because recording is not enabled");
+ return INVALID_OPERATION;
+ }
+ if (!kEnableKernelIpc) {
+ ALOGW("Binder recording disallowed because kernel binder is not enabled");
+ return INVALID_OPERATION;
+ }
+ uid_t uid = IPCThreadState::self()->getCallingUid();
+ if (uid != AID_ROOT) {
+ ALOGE("Binder recording not allowed because client %" PRIu32 " is not root", uid);
+ return PERMISSION_DENIED;
+ }
+ Extras* e = getOrCreateExtras();
+ AutoMutex lock(e->mLock);
+ if (mRecordingOn) {
+ e->mRecordingFd.reset();
+ mRecordingOn = false;
+ LOG(INFO) << "Stopped Binder recording.";
+ return NO_ERROR;
+ } else {
+ LOG(INFO) << "Could not stop Binder recording. One is not in progress.";
+ return INVALID_OPERATION;
+ }
+}
+
const String16& BBinder::getInterfaceDescriptor() const
{
static StaticString16 sBBinder(u"BBinder");
@@ -303,6 +371,12 @@
case PING_TRANSACTION:
err = pingBinder();
break;
+ case START_RECORDING_TRANSACTION:
+ err = startRecordingTransactions(data);
+ break;
+ case STOP_RECORDING_TRANSACTION:
+ err = stopRecordingTransactions();
+ break;
case EXTENSION_TRANSACTION:
CHECK(reply != nullptr);
err = reply->writeStrongBinder(getExtension());
@@ -329,6 +403,26 @@
}
}
+ if (CC_UNLIKELY(kEnableKernelIpc && mRecordingOn && code != START_RECORDING_TRANSACTION)) {
+ Extras* e = mExtras.load(std::memory_order_acquire);
+ AutoMutex lock(e->mLock);
+ if (mRecordingOn) {
+ Parcel emptyReply;
+ auto transaction =
+ android::binder::debug::RecordedTransaction::fromDetails(code, flags, data,
+ reply ? *reply
+ : emptyReply,
+ err);
+ if (transaction) {
+ if (status_t err = transaction->dumpToFile(e->mRecordingFd); err != NO_ERROR) {
+ LOG(INFO) << "Failed to dump RecordedTransaction to file with error " << err;
+ }
+ } else {
+ LOG(INFO) << "Failed to create RecordedTransaction object.";
+ }
+ }
+ }
+
return err;
}