Commit: ec24610ba1fa74abfe20fa926da934a6862d445d - system-core (git)

system/core

Commit MetaInfo

• Revision: ec24610ba1fa74abfe20fa926da934a6862d445d (tree)
• Zeit: 2017-01-10 13:24:43
• Autor: Chih-Wei Huang <cwhuang@linu...>
• Commiter: Chih-Wei Huang

Log Message

Android 6.0.1 release 74
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Merge tag 'android-6.0.1_r74' into marshmallow-x86

Android 6.0.1 release 74

Ändern Zusammenfassung

• modified: include/android/log.h
• modified: include/sysutils/FrameworkListener.h
• modified: liblog/logd_write.c
• modified: liblog/logd_write_kern.c
• modified: liblog/tests/liblog_test.cpp
• modified: libsysutils/src/FrameworkListener.cpp

Diff

--- a/include/android/log.h
+++ b/include/android/log.h
@@ -89,6 +89,11 @@ typedef enum android_LogPriority {
 } android_LogPriority;
 
 /*
+ * Release any logger resources (a new log write will immediately re-acquire)
+ */
+void __android_log_close();
+
+/*
  * Send a simple string to the log.
  */
 int __android_log_write(int prio, const char *tag, const char *text);

--- a/include/sysutils/FrameworkListener.h
+++ b/include/sysutils/FrameworkListener.h
@@ -32,6 +32,7 @@ private:
     int mCommandCount;
     bool mWithSeq;
     FrameworkCommandCollection *mCommands;
+    bool mSkipToNextNullByte;
 
 public:
     FrameworkListener(const char *socketName);

--- a/liblog/logd_write.c
+++ b/liblog/logd_write.c
@@ -323,6 +323,48 @@ const char *android_log_id_to_name(log_id_t log_id)
 }
 #endif
 
+/*
+ * Release any logger resources. A new log write will immediately re-acquire.
+ */
+void __android_log_close()
+{
+#if FAKE_LOG_DEVICE
+    int i;
+#endif
+
+#ifdef HAVE_PTHREADS
+    pthread_mutex_lock(&log_init_lock);
+#endif
+
+    write_to_log = __write_to_log_init;
+
+    /*
+     * Threads that are actively writing at this point are not held back
+     * by a lock and are at risk of dropping the messages with a return code
+     * -EBADF. Prefer to return error code than add the overhead of a lock to
+     * each log writing call to guarantee delivery. In addition, anyone
+     * calling this is doing so to release the logging resources and shut down,
+     * for them to do so with outstanding log requests in other threads is a
+     * disengenuous use of this function.
+     */
+#if FAKE_LOG_DEVICE
+    for (i = 0; i < LOG_ID_MAX; i++) {
+        fakeLogClose(log_fds[i]);
+        log_fds[i] = -1;
+    }
+#else
+    close(logd_fd);
+    logd_fd = -1;
+
+    close(pstore_fd);
+    pstore_fd = -1;
+#endif
+
+#ifdef HAVE_PTHREADS
+    pthread_mutex_unlock(&log_init_lock);
+#endif
+}
+
 static int __write_to_log_init(log_id_t log_id, struct iovec *vec, size_t nr)
 {
 #if !defined(_WIN32)

--- a/liblog/logd_write_kern.c
+++ b/liblog/logd_write_kern.c
@@ -104,6 +104,41 @@ static int __write_to_log_kernel(log_id_t log_id, struct iovec *vec, size_t nr)
     return ret;
 }
 
+/*
+ * Release any logger resources. A new log write will immediately re-acquire.
+ */
+void __android_log_close()
+{
+#ifdef HAVE_PTHREADS
+    pthread_mutex_lock(&log_init_lock);
+#endif
+
+    write_to_log = __write_to_log_init;
+
+    /*
+     * Threads that are actively writing at this point are not held back
+     * by a lock and are at risk of dropping the messages with a return code
+     * -EBADF. Prefer to return error code than add the overhead of a lock to
+     * each log writing call to guarantee delivery. In addition, anyone
+     * calling this is doing so to release the logging resources and shut down,
+     * for them to do so with outstanding log requests in other threads is a
+     * disengenuous use of this function.
+     */
+
+    log_close(log_fds[LOG_ID_MAIN]);
+    log_fds[LOG_ID_MAIN] = -1;
+    log_close(log_fds[LOG_ID_RADIO]);
+    log_fds[LOG_ID_RADIO] = -1;
+    log_close(log_fds[LOG_ID_EVENTS]);
+    log_fds[LOG_ID_EVENTS] = -1;
+    log_close(log_fds[LOG_ID_SYSTEM]);
+    log_fds[LOG_ID_SYSTEM] = -1;
+
+#ifdef HAVE_PTHREADS
+    pthread_mutex_unlock(&log_init_lock);
+#endif
+}
+
 static int __write_to_log_init(log_id_t log_id, struct iovec *vec, size_t nr)
 {
     pthread_mutex_lock(&log_init_lock);

--- a/liblog/tests/liblog_test.cpp
+++ b/liblog/tests/liblog_test.cpp
@@ -127,12 +127,17 @@ TEST(liblog, __android_log_btwrite__android_logger_list_read) {
     ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
         LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
 
+    // Check that we can close and reopen the logger
     log_time ts(CLOCK_MONOTONIC);
-
     ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
+    __android_log_close();
+
+    log_time ts1(CLOCK_MONOTONIC);
+    ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts1, sizeof(ts1)));
     usleep(1000000);
 
     int count = 0;
+    int second_count = 0;
 
     for (;;) {
         log_msg log_msg;
@@ -156,10 +161,13 @@ TEST(liblog, __android_log_btwrite__android_logger_list_read) {
         log_time tx(eventData + 4 + 1);
         if (ts == tx) {
             ++count;
+        } else if (ts1 == tx) {
+            ++second_count;
         }
     }
 
     EXPECT_EQ(1, count);
+    EXPECT_EQ(1, second_count);
 
     android_logger_list_close(logger_list);
 }

--- a/libsysutils/src/FrameworkListener.cpp
+++ b/libsysutils/src/FrameworkListener.cpp
@@ -49,6 +49,7 @@ void FrameworkListener::init(const char *socketName UNUSED, bool withSeq) {
     errorRate = 0;
     mCommandCount = 0;
     mWithSeq = withSeq;
+    mSkipToNextNullByte = false;
 }
 
 bool FrameworkListener::onDataAvailable(SocketClient *c) {
@@ -59,10 +60,15 @@ bool FrameworkListener::onDataAvailable(SocketClient *c) {
     if (len < 0) {
         SLOGE("read() failed (%s)", strerror(errno));
         return false;
-    } else if (!len)
+    } else if (!len) {
         return false;
-   if(buffer[len-1] != '\0')
+    } else if (buffer[len-1] != '\0') {
         SLOGW("String is not zero-terminated");
+        android_errorWriteLog(0x534e4554, "29831647");
+        c->sendMsg(500, "Command too large for buffer", false);
+        mSkipToNextNullByte = true;
+        return false;
+    }
 
     int offset = 0;
     int i;
@@ -70,11 +76,16 @@ bool FrameworkListener::onDataAvailable(SocketClient *c) {
     for (i = 0; i < len; i++) {
         if (buffer[i] == '\0') {
             /* IMPORTANT: dispatchCommand() expects a zero-terminated string */
-            dispatchCommand(c, buffer + offset);
+            if (mSkipToNextNullByte) {
+                mSkipToNextNullByte = false;
+            } else {
+                dispatchCommand(c, buffer + offset);
+            }
             offset = i + 1;
         }
     }
 
+    mSkipToNextNullByte = false;
     return true;
 }