commit d426582c340cbda3e612a0a2db3e981630624818
author Andy Hung <hunga@google.com> Fri Apr 01 18:54:32 2022 -0700
committer Andy Hung <hunga@google.com> Tue Apr 05 15:03:17 2022 -0700
tree 0aa52a9bcbfe1629eca86cf8ae0b4a479c47eb09
parent a6a905074f68c09873395fecd9992b48727533f4

MediaUtils: Use delayed / lazy library loading

Postpone loading libutilscallstack until needed
to save memory.

Test: atest library_tests
Test: adb shell 'showmap $(pgrep mediametrics)'
Bug: 227536784
Change-Id: I3d4c9e9b6d854b013185e18fc20d4bec320df14e

media/utils/Android.bp

diff --git a/media/utils/Android.bp b/media/utils/Android.bp
index 1756e47..3b079c6 100644
--- a/media/utils/Android.bp
+++ b/media/utils/Android.bp
@@ -28,7 +28,9 @@
         "AImageReaderUtils.cpp",
         "BatteryNotifier.cpp",
         "ISchedulingPolicyService.cpp",
+        "Library.cpp",
         "LimitProcessMemory.cpp",
+        "MediaUtilsDelayed.cpp",
         "MemoryLeakTrackUtil.cpp",
         "MethodStatistics.cpp",
         "ProcessInfo.cpp",
@@ -49,7 +51,6 @@
         "libcutils",
         "liblog",
         "libutils",
-        "libutilscallstack",
         "libhidlbase",
         "libpermission",
         "android.hardware.graphics.bufferqueue@1.0",
@@ -77,6 +78,10 @@
         "libpermission",
     ],
 
+    required: [
+        "libmediautils_delayed",  // lazy loaded
+    ],
+
     include_dirs: [
         // For DEBUGGER_SIGNAL
         "system/core/debuggerd/include",
@@ -86,6 +91,23 @@
 }
 
 cc_library {
+    name: "libmediautils_delayed", // match with MEDIAUTILS_DELAYED_LIBRARY_NAME
+    srcs: [
+        "MediaUtilsDelayedLibrary.cpp",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wextra",
+    ],
+    shared_libs: [
+        "liblog",
+        "libutils",
+        "libutilscallstack",
+    ],
+}
+
+cc_library {
     name: "libmediautils_vendor",
     vendor_available: true,  // required for platform/hardware/interfaces
     srcs: [