Merge "More consistently retry system calls on EINTR" (e9554cb7) · Commits · e / os / android_frameworks_base

core/jni/com_android_internal_os_Zygote.cpp

+1 −1

Original line number	Diff line number	Diff line
		@@ -874,7 +874,7 @@ static void DetachDescriptors(JNIEnv* env,

		for (int fd : fds_to_close) {
		ALOGV("Switching descriptor %d to /dev/null", fd);
		if (dup3(devnull_fd, fd, O_CLOEXEC) == -1) {
		if (TEMP_FAILURE_RETRY(dup3(devnull_fd, fd, O_CLOEXEC)) == -1) {
		fail_fn(StringPrintf("Failed dup3() on descriptor %d: %s", fd, strerror(errno)));
		}
		}

+4 −4

Original line number	Diff line number	Diff line
		@@ -426,7 +426,7 @@ jboolean com_android_internal_os_ZygoteCommandBuffer_nativeForkRepeatedly(
		tmp_pid >>= 8;
		}
		pid_buf[4] = 0; // Process is not wrapped.
		int res = write(session_socket, pid_buf, 5);
		int res = TEMP_FAILURE_RETRY(write(session_socket, pid_buf, 5));
		if (res != 5) {
		if (res == -1) {
		(first_time ? fail_fn_1 : fail_fn_n)
		@@ -451,18 +451,18 @@ jboolean com_android_internal_os_ZygoteCommandBuffer_nativeForkRepeatedly(
		}
		// We've now seen either a disconnect or connect request.
		close(session_socket);
		int new_fd = accept(zygote_socket_fd, nullptr, nullptr);
		int new_fd = TEMP_FAILURE_RETRY(accept(zygote_socket_fd, nullptr, nullptr));
		if (new_fd == -1) {
		fail_fn_z(CREATE_ERROR("Accept(%d) failed: %s", zygote_socket_fd, strerror(errno)));
		}
		if (new_fd != session_socket) {
		// Move new_fd back to the old value, so that we don't have to change Java-level data
		// structures to reflect a change. This implicitly closes the old one.
		if (dup2(new_fd, session_socket) != session_socket) {
		if (TEMP_FAILURE_RETRY(dup2(new_fd, session_socket)) != session_socket) {
		fail_fn_z(CREATE_ERROR("Failed to move fd %d to %d: %s",
		new_fd, session_socket, strerror(errno)));
		}
		close(new_fd);
		close(new_fd); // On Linux, fd is closed even if EINTR is returned.
		}
		// If we ever return, we effectively reuse the old Java ZygoteConnection.
		// None of its state needs to change.