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1 // RUN: %clang_analyze_cc1 -triple i386-apple-darwin10 -verify %s \
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2 // RUN: -analyzer-checker=core.builtin \
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3 // RUN: -analyzer-checker=debug.ExprInspection \
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4 // RUN: -analyzer-checker=unix.cstring \
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5 // RUN: -analyzer-config display-checker-name=false
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150
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6
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7 typedef unsigned long size_t;
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8
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9 struct S {
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10 struct S3 {
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11 int y[10];
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12 };
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13 struct S2 : S3 {
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14 int *x;
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15 } s2[10];
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16 int z;
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17 };
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18
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19
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20 void clang_analyzer_explain(int);
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21 void clang_analyzer_explain(void *);
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22 void clang_analyzer_explain(S);
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23
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24 size_t clang_analyzer_getExtent(void *);
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25
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26 size_t strlen(const char *);
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27
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28 int conjure();
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29 S conjure_S();
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30
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31 int glob;
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32 static int stat_glob;
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33 void *glob_ptr;
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34
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35 // Test strings are regex'ed because we need to match exact string
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36 // rather than a substring.
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37
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38 void test_1(int param, void *ptr) {
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39 clang_analyzer_explain(&glob); // expected-warning-re{{{{^pointer to global variable 'glob'$}}}}
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40 clang_analyzer_explain(param); // expected-warning-re{{{{^argument 'param'$}}}}
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41 clang_analyzer_explain(ptr); // expected-warning-re{{{{^argument 'ptr'$}}}}
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42 if (param == 42)
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43 clang_analyzer_explain(param); // expected-warning-re{{{{^signed 32-bit integer '42'$}}}}
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44 }
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45
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46 void test_2(char *ptr, int ext) {
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47 clang_analyzer_explain((void *) "asdf"); // expected-warning-re{{{{^pointer to element of type 'char' with index 0 of string literal "asdf"$}}}}
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48 clang_analyzer_explain(strlen(ptr)); // expected-warning-re{{{{^metadata of type 'unsigned long' tied to pointee of argument 'ptr'$}}}}
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49 clang_analyzer_explain(conjure()); // expected-warning-re{{{{^symbol of type 'int' conjured at statement 'conjure\(\)'$}}}}
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50 clang_analyzer_explain(glob); // expected-warning-re{{{{^value derived from \(symbol of type 'int' conjured at statement 'conjure\(\)'\) for global variable 'glob'$}}}}
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51 clang_analyzer_explain(glob_ptr); // expected-warning-re{{{{^value derived from \(symbol of type 'int' conjured at statement 'conjure\(\)'\) for global variable 'glob_ptr'$}}}}
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52 clang_analyzer_explain(clang_analyzer_getExtent(ptr)); // expected-warning-re{{{{^extent of pointee of argument 'ptr'$}}}}
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53 int *x = new int[ext];
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54 clang_analyzer_explain(x); // expected-warning-re{{{{^pointer to element of type 'int' with index 0 of heap segment that starts at symbol of type 'int \*' conjured at statement 'new int \[ext\]'$}}}}
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55 // Sic! What gets computed is the extent of the element-region.
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56 clang_analyzer_explain(clang_analyzer_getExtent(x)); // expected-warning-re{{{{^signed 32-bit integer '4'$}}}}
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57 delete[] x;
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58 }
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59
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60 void test_3(S s) {
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61 clang_analyzer_explain(&s); // expected-warning-re{{{{^pointer to parameter 's'$}}}}
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62 clang_analyzer_explain(s.z); // expected-warning-re{{{{^initial value of field 'z' of parameter 's'$}}}}
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63 clang_analyzer_explain(&s.s2[5].y[3]); // expected-warning-re{{{{^pointer to element of type 'int' with index 3 of field 'y' of base object 'S::S3' inside element of type 'struct S::S2' with index 5 of field 's2' of parameter 's'$}}}}
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64 if (!s.s2[7].x) {
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65 clang_analyzer_explain(s.s2[7].x); // expected-warning-re{{{{^concrete memory address '0'$}}}}
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66 // FIXME: we need to be explaining '1' rather than '0' here; not explainer bug.
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67 clang_analyzer_explain(s.s2[7].x + 1); // expected-warning-re{{{{^concrete memory address '0'$}}}}
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68 }
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69 }
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70
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71 void test_4(int x, int y) {
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72 int z;
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73 static int stat;
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74 clang_analyzer_explain(x + 1); // expected-warning-re{{{{^\(argument 'x'\) \+ 1$}}}}
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75 clang_analyzer_explain(1 + y); // expected-warning-re{{{{^\(argument 'y'\) \+ 1$}}}}
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76 clang_analyzer_explain(x + y); // expected-warning-re{{{{^\(argument 'x'\) \+ \(argument 'y'\)$}}}}
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77 clang_analyzer_explain(z); // expected-warning-re{{{{^undefined value$}}}}
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78 clang_analyzer_explain(&z); // expected-warning-re{{{{^pointer to local variable 'z'$}}}}
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79 clang_analyzer_explain(stat); // expected-warning-re{{{{^signed 32-bit integer '0'$}}}}
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80 clang_analyzer_explain(&stat); // expected-warning-re{{{{^pointer to static local variable 'stat'$}}}}
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81 clang_analyzer_explain(stat_glob); // expected-warning-re{{{{^initial value of global variable 'stat_glob'$}}}}
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82 clang_analyzer_explain(&stat_glob); // expected-warning-re{{{{^pointer to global variable 'stat_glob'$}}}}
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83 clang_analyzer_explain((int[]){1, 2, 3}); // expected-warning-re{{{{^pointer to element of type 'int' with index 0 of temporary object constructed at statement '\(int \[3\]\)\{1, 2, 3\}'$}}}}
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84 }
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85
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86 namespace {
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87 class C {
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88 int x[10];
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89
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90 public:
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91 void test_5(int i) {
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92 clang_analyzer_explain(this); // expected-warning-re{{{{^pointer to 'this' object$}}}}
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93 clang_analyzer_explain(&x[i]); // expected-warning-re{{{{^pointer to element of type 'int' with index 'argument 'i'' of field 'x' of 'this' object$}}}}
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94 clang_analyzer_explain(__builtin_alloca(i)); // expected-warning-re{{{{^pointer to region allocated by '__builtin_alloca\(i\)'$}}}}
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95 }
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96 };
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97 } // end of anonymous namespace
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98
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99 void test_6() {
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100 clang_analyzer_explain(conjure_S()); // expected-warning-re{{{{^lazily frozen compound value of temporary object constructed at statement 'conjure_S\(\)'$}}}}
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101 clang_analyzer_explain(conjure_S().z); // expected-warning-re{{{{^value derived from \(symbol of type 'int' conjured at statement 'conjure_S\(\)'\) for field 'z' of temporary object constructed at statement 'conjure_S\(\)'$}}}}
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102 }
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