process: Add debug code to log process group transitions (a5109a87) · Commits · e / os / android_frameworks_base

core/jni/android_util_Process.cpp

+22 −0

Original line number	Diff line number	Diff line
		@@ -51,6 +51,8 @@ pid_t gettid() { return syscall(__NR_gettid);}
		#undef __KERNEL__
		#endif

		#define POLICY_DEBUG 1

		using namespace android;

		static void signalExceptionForPriorityError(JNIEnv* env, jobject obj, int err)
		@@ -212,6 +214,26 @@ void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jin
		return;
		}

		#if POLICY_DEBUG
		char cmdline[32];
		int fd;

		strcpy(cmdline, "unknown");

		sprintf(proc_path, "/proc/%d/cmdline", pid);
		fd = open(proc_path, O_RDONLY);
		if (fd >= 0) {
		int rc = read(fd, cmdline, sizeof(cmdline)-1);
		cmdline[rc] = 0;
		close(fd);
		}

		if (grp == ANDROID_TGROUP_BG_NONINTERACT) {
		LOGD("setProcessGroup: vvv pid %d (%s)", pid, cmdline);
		} else {
		LOGD("setProcessGroup: ^^^ pid %d (%s)", pid, cmdline);
		}
		#endif
		sprintf(proc_path, "/proc/%d/task", pid);
		if (!(d = opendir(proc_path))) {
		// If the process exited on us, don't generate an exception