/* * Copyright (c) 2018-present, Facebook, Inc. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. */ import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import org.json.JSONArray; class UnknownCallsTest { private int mBytesToRead; public void jsonArray_linear(JSONArray jsonArray) { int length = jsonArray.length(); for (int i = 0; i < length; ++i) {} } // call to JSONArray.length is not modeled, hence the result will // not be invariant. Therefore we get quadratic bound. public void jsonArray_quadratic(JSONArray jsonArray) { for (int i = 0; i < jsonArray.length(); ++i) {} } public int read_sum_cost( InputStream in, byte[] buffer, int byteOffset, int byteCount, ArrayList list) throws IOException { int maxBytesToRead = Math.min(byteCount, mBytesToRead); int bytesRead = in.read(buffer, byteOffset, maxBytesToRead); for (int index = 0; index < bytesRead + maxBytesToRead; ++index) {} return 0; } // Expected: Max(Math,min(...), InputStream.read(....)) but we get T public int read_max_cost( InputStream in, byte[] buffer, int byteOffset, int byteCount, ArrayList list) throws IOException { int maxBytesToRead = Math.min(byteCount, mBytesToRead); int bytesRead = in.read(buffer, byteOffset, maxBytesToRead); // after the join, we get maxBytesToRead in [0, +oo]. Hence, the loop gets T if (bytesRead > 0) { maxBytesToRead = bytesRead + 1; } for (int index = 0; index < maxBytesToRead; ++index) {} return 0; } private static void loop_over_charArray(StringBuilder builder, String input) { for (Character c : input.toCharArray()) {} } private static void call_loop_over_charArray(StringBuilder out, String in) { loop_over_charArray(out, in); } }