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152
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1 /* PR c/93812 - ICE on redeclaration of an attribute format function without
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2 protoype
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3 It's not clear that attribute format should be accepted on functions
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4 without a prototype. If it's decided that it shouldn't be the tests
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5 here will need to be adjusted.
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6 { dg-do compile }
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7 { dg-options "-Wall" } */
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8
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9 #define FMT(n1, n2) __attribute__((__format__(__printf__, n1, n2)))
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10
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11 // Exercise function declarations.
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12 FMT (1, 2) void print1 ();
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13
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14 FMT (2, 3) void print2 ();
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15 void print2 ();
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16
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17 FMT (3, 4) void print3 ();
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18 FMT (3, 4) void print3 ();
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19
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20 FMT (1, 2) void print4 ();
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21 void print4 (void); // { dg-warning "'format' attribute cannot be applied to a function that does not take variable arguments" }
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22
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23 void print5 ();
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24 FMT (1, 2) void print5 (void); // { dg-warning "\\\[-Wattributes" }
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25
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26 FMT (1, 2) void print6 ();
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27 void print6 (const char*, ...); // { dg-error "conflicting types" }
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28
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29 void print7 (const char*, ...);
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30 FMT (1, 2) void print7 (); // { dg-error "conflicting types" }
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31
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32
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33 // Exercise function calls.
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34 void test_print (void)
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35 {
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36 print1 ("%i %s", 123, "");
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37 print1 ("%s %i", 123, 123); // { dg-warning "\\\[-Wformat" }
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38
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39 print2 (0, "%s %i", "", 123);
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40 print2 (1, "%i %s", "", 123); // { dg-warning "\\\[-Wformat" }
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41
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42 print3 (0, 1, "%s %i", "", 123);
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43 print3 (1, 2, "%i %s", "", 123); // { dg-warning "\\\[-Wformat" }
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44
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45 // Just verify there's no ICE.
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46 print4 ();
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47 print5 ();
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48 print6 ("%i %s", 123, "");
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49 }
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50
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51
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52 // Exercise declarations of pointers to functions.
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53 FMT (1, 2) void (*pfprint1)();
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54
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55 FMT (2, 3) void (*pfprint2)();
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56 void (*pfprint2)();
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57
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58 FMT (3, 4) void (*pfprint3)();
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59 FMT (3, 4) void (*pfprint3)();
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60
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61 FMT (1, 2) void (*pfprint4)();
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62 void (*pfprint4)(void); // { dg-warning "'format' attribute cannot be applied to a function that does not take variable arguments" }
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63
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64 void (*pfprint5)();
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65 FMT (1, 2) void (*pfprint5)(void); // { dg-warning "\\\[-Wattributes" }
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66
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67 FMT (1, 2) void (*pfprint6)();
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68 void (*pfprint6)(const char*, ...); // { dg-error "conflicting types" }
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69
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70 void (*pfprint7)(const char*, ...);
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71 FMT (1, 2) void (*pfprint7)(); // { dg-error "conflicting types" }
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72
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73 // Exercise calls via function pointers.
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74 void test_pfprint (void)
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75 {
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76 pfprint1 ("%i %s", 123, "");
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77 pfprint1 ("%s %i", 123, 123); // { dg-warning "\\\[-Wformat" }
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78
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79 pfprint2 (0, "%s %i", "", 123);
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80 pfprint2 (1, "%i %s", "", 123); // { dg-warning "\\\[-Wformat" }
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81
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82 pfprint3 (0, 1, "%s %i", "", 123);
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83 pfprint3 (1, 2, "%i %s", "", 123); // { dg-warning "\\\[-Wformat" }
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84
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85 // Just verify there's no ICE.
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86 pfprint4 ();
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87 pfprint5 ();
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88 pfprint6 ("%i %s", 123, "");
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89 }
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