1 // RUN: %clang_analyze_cc1 -triple i386-apple-darwin10 -verify %s \
2 // RUN:   -analyzer-checker=core.builtin \
3 // RUN:   -analyzer-checker=debug.ExprInspection \
4 // RUN:   -analyzer-checker=unix.cstring \
5 // RUN:   -analyzer-config display-checker-name=false
6 
7 typedef unsigned long size_t;
8 
9 struct S {
10   struct S3 {
11     int y[10];
12   };
13   struct S2 : S3 {
14     int *x;
15   } s2[10];
16   int z;
17 };
18 
19 
20 void clang_analyzer_explain(int);
21 void clang_analyzer_explain(void *);
22 void clang_analyzer_explain(S);
23 
24 size_t clang_analyzer_getExtent(void *);
25 
26 size_t strlen(const char *);
27 
28 int conjure();
29 S conjure_S();
30 
31 int glob;
32 static int stat_glob;
33 void *glob_ptr;
34 
35 // Test strings are regex'ed because we need to match exact string
36 // rather than a substring.
37 
38 void test_1(int param, void *ptr) {
39   clang_analyzer_explain(&glob); // expected-warning-re{{{{^pointer to global variable 'glob'$}}}}
40   clang_analyzer_explain(param); // expected-warning-re{{{{^argument 'param'$}}}}
41   clang_analyzer_explain(ptr); // expected-warning-re{{{{^argument 'ptr'$}}}}
42   if (param == 42)
43     clang_analyzer_explain(param); // expected-warning-re{{{{^signed 32-bit integer '42'$}}}}
44 }
45 
46 void test_2(char *ptr, int ext) {
47   clang_analyzer_explain((void *) "asdf"); // expected-warning-re{{{{^pointer to element of type 'char' with index 0 of string literal "asdf"$}}}}
48   clang_analyzer_explain(strlen(ptr)); // expected-warning-re{{{{^metadata of type 'unsigned long' tied to pointee of argument 'ptr'$}}}}
49   clang_analyzer_explain(conjure()); // expected-warning-re{{{{^symbol of type 'int' conjured at statement 'conjure\(\)'$}}}}
50   clang_analyzer_explain(glob); // expected-warning-re{{{{^value derived from \(symbol of type 'int' conjured at statement 'conjure\(\)'\) for global variable 'glob'$}}}}
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'$}}}}
52   clang_analyzer_explain(clang_analyzer_getExtent(ptr)); // expected-warning-re{{{{^extent of pointee of argument 'ptr'$}}}}
53   int *x = new int[ext];
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 \[ext\]'$}}}}
55   // Sic! What gets computed is the extent of the element-region.
56   clang_analyzer_explain(clang_analyzer_getExtent(x)); // expected-warning-re{{{{^signed 32-bit integer '4'$}}}}
57   delete[] x;
58 }
59 
60 void test_3(S s) {
61   clang_analyzer_explain(&s); // expected-warning-re{{{{^pointer to parameter 's'$}}}}
62   clang_analyzer_explain(s.z); // expected-warning-re{{{{^initial value of field 'z' of parameter 's'$}}}}
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'$}}}}
64   if (!s.s2[7].x) {
65     clang_analyzer_explain(s.s2[7].x); // expected-warning-re{{{{^concrete memory address '0'$}}}}
66     // FIXME: we need to be explaining '1' rather than '0' here; not explainer bug.
67     clang_analyzer_explain(s.s2[7].x + 1); // expected-warning-re{{{{^concrete memory address '0'$}}}}
68   }
69 }
70 
71 void test_4(int x, int y) {
72   int z;
73   static int stat;
74   clang_analyzer_explain(x + 1); // expected-warning-re{{{{^\(argument 'x'\) \+ 1$}}}}
75   clang_analyzer_explain(1 + y); // expected-warning-re{{{{^\(argument 'y'\) \+ 1$}}}}
76   clang_analyzer_explain(x + y); // expected-warning-re{{{{^\(argument 'x'\) \+ \(argument 'y'\)$}}}}
77   clang_analyzer_explain(z); // expected-warning-re{{{{^undefined value$}}}}
78   clang_analyzer_explain(&z); // expected-warning-re{{{{^pointer to local variable 'z'$}}}}
79   clang_analyzer_explain(stat); // expected-warning-re{{{{^signed 32-bit integer '0'$}}}}
80   clang_analyzer_explain(&stat); // expected-warning-re{{{{^pointer to static local variable 'stat'$}}}}
81   clang_analyzer_explain(stat_glob); // expected-warning-re{{{{^initial value of global variable 'stat_glob'$}}}}
82   clang_analyzer_explain(&stat_glob); // expected-warning-re{{{{^pointer to global variable 'stat_glob'$}}}}
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\}'$}}}}
84 }
85 
86 namespace {
87 class C {
88   int x[10];
89 
90 public:
91   void test_5(int i) {
92     clang_analyzer_explain(this); // expected-warning-re{{{{^pointer to 'this' object$}}}}
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$}}}}
94     clang_analyzer_explain(__builtin_alloca(i)); // expected-warning-re{{{{^pointer to region allocated by '__builtin_alloca\(i\)'$}}}}
95   }
96 };
97 } // end of anonymous namespace
98 
99 void test_6() {
100   clang_analyzer_explain(conjure_S()); // expected-warning-re{{{{^lazily frozen compound value of temporary object constructed at statement 'conjure_S\(\)'$}}}}
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\(\)'$}}}}
102 }
103