Merge "fix: ATRACE does not work for libs loaded in sphal namespace" into oc-dev

am: b560e6db6a

Change-Id: I3c81f72c2d5f1eb30401012b92a1a3b65cbfdb80

libutils/Android.bp

@@ -100,6 +100,7 @@ cc_library {
                 "libcutils",
                 "libdl",
                 "liblog",
+                "libvndksupport",
             ],
 
             sanitize: {

libutils/misc.cpp

@@ -23,6 +23,13 @@
 #include <utils/Log.h>
 #include <utils/Vector.h>
 
+#if defined(__ANDROID__)
+#include <dlfcn.h>
+#include <vndksupport/linker.h>
+#endif
+
+extern "C" void do_report_sysprop_change();
+
 using namespace android;
 
 namespace android {
@@ -61,7 +68,36 @@ void add_sysprop_change_callback(sysprop_change_callback cb, int priority) {
 #endif
 }
 
+#if defined(__ANDROID__)
+void (*get_report_sysprop_change_func())() {
+    void (*func)() = nullptr;
+    void* handle = android_load_sphal_library("libutils.so", RTLD_NOW);
+    if (handle != nullptr) {
+        func = reinterpret_cast<decltype(func)>(dlsym(handle, "do_report_sysprop_change"));
+    }
+
+    return func;
+}
+#endif
+
 void report_sysprop_change() {
+    do_report_sysprop_change();
+
+#if defined(__ANDROID__)
+    // libutils.so is double loaded; from the default namespace and from the
+    // 'sphal' namespace. Redirect the sysprop change event to the other instance
+    // of libutils.so loaded in the 'sphal' namespace so that listeners attached
+    // to that instance is also notified with this event.
+    static auto func = get_report_sysprop_change_func();
+    if (func != nullptr) {
+        (*func)();
+    }
+#endif
+}
+
+};  // namespace android
+
+void do_report_sysprop_change() {
 #if !defined(_WIN32)
     pthread_mutex_lock(&gSyspropMutex);
     Vector<sysprop_change_callback_info> listeners;
@@ -76,5 +112,3 @@ void report_sysprop_change() {
     }
 #endif
 }
-
-}; // namespace android

libvndksupport/Android.bp

@@ -1,6 +1,6 @@
 subdirs = ["tests"]
 
-cc_library_shared {
+cc_library {
     name: "libvndksupport",
     srcs: ["linker.c"],
     local_include_dirs: ["include/vndksupport"],