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Commit 0afcca0b authored Sep 17, 2019 by Adam Bodnar

[libgraphicsenv] Add an API to enable profiling features

Set PR_SET_DUMPABLE for process that wishes to
inject Vk/GL layers via metadata. This signals the
graphics driver to enable profiling features.

Bug: 138204026

Test: Add <meta-data android:name="com.android.graphics.injectLayers.enable" android:value="true" />
to the <application> xml in the manifest of a GL/Vk app. Call
prctl(PR_GET_DUMPABLE) in a native app to verify.

Change-Id: Ife7d18f77775499629d830376a76c4599afd9c15

parent 55d7b345

libs/graphicsenv/GraphicsEnv.cpp

+7 −0

Original line number	Diff line number	Diff line
		@@ -307,6 +307,13 @@ void GraphicsEnv::sendGpuStatsLocked(GpuStatsInfo::Api api, bool isDriverLoaded,
		}
		}

		bool GraphicsEnv::setInjectLayersPrSetDumpable() {
		if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) {
		return false;
		}
		return true;
		}

		void* GraphicsEnv::loadLibrary(std::string name) {
		const android_dlextinfo dlextinfo = {
		.flags = ANDROID_DLEXT_USE_NAMESPACE,

libs/graphicsenv/include/graphicsenv/GraphicsEnv.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -67,6 +67,14 @@ public:
		// Set which driver is actually loaded.
		void setDriverLoaded(GpuStatsInfo::Api api, bool isDriverLoaded, int64_t driverLoadingTime);

		/*
		* Api for Vk/GL layer injection. Presently, drivers enable certain
		* profiling features when prctl(PR_GET_DUMPABLE) returns true.
		* Calling this when layer injection metadata is present allows the driver
		* to enable profiling even when in a non-debuggable app
		*/
		bool setInjectLayersPrSetDumpable();

		/*
		* Apis for ANGLE
		*/