1 // Check that NullPointerExceptions thrown from library code are 2 // caught. This detects a number of failures that can be caused by 3 // libgcj being built incorrectly. In particular, we ensure that a 4 // SEGV in native (i.e. C++) code in libgcj is handled correctly. 5 6 // Regrettably, we cannot guarantee that Double.parseDouble() will 7 // always be native code, or that it will never be inlined. It could 8 // be argued that we should add a method to libgcj that will be 9 // guaranteed forever to be native, but I'm reluctant to add to the 10 // library for the sole purpose of performing this test. 11 12 public class Throw_2 13 { obj()14 public static Throwable obj() 15 { 16 return null; 17 } 18 str()19 public static String str() 20 { 21 return null; 22 } 23 24 static double d; 25 main(String[] args)26 public static void main (String[] args) 27 { 28 // This NullPointerException will, at the time of writing, be 29 // thrown from Java code in libgcj. 30 try 31 { 32 java.util.Vector v = new java.util.Vector (null); 33 System.out.println ("fail: no exception thrown"); 34 } 35 catch (NullPointerException _) 36 { 37 System.out.println ("1"); 38 } 39 catch (Throwable _) 40 { 41 System.out.println ("fail: " + _); 42 } 43 // This one will, at the time of writing, be thrown from C++ 44 // code in libgcj. 45 try 46 { 47 d = Double.parseDouble(str()); 48 System.out.println ("fail: no exception thrown"); 49 } 50 catch (NullPointerException _) 51 { 52 System.out.println ("2"); 53 } 54 catch (Throwable _) 55 { 56 System.out.println ("fail: " + _); 57 } 58 } 59 } 60