1 // RUN: %clang_cc1 -triple i386-apple-darwin10 -analyze -analyzer-checker=core.builtin,debug.ExprInspection,unix.cstring -verify %s
2
3 typedef unsigned long size_t;
4
5 struct S {
6 struct S3 {
7 int y[10];
8 };
9 struct S2 : S3 {
10 int *x;
11 } s2[10];
12 int z;
13 };
14
15
16 void clang_analyzer_explain(int);
17 void clang_analyzer_explain(void *);
18 void clang_analyzer_explain(S);
19
20 size_t clang_analyzer_getExtent(void *);
21
22 size_t strlen(const char *);
23
24 int conjure();
25 S conjure_S();
26
27 int glob;
28 static int stat_glob;
29 void *glob_ptr;
30
31 // Test strings are regex'ed because we need to match exact string
32 // rather than a substring.
33
test_1(int param,void * ptr)34 void test_1(int param, void *ptr) {
35 clang_analyzer_explain(&glob); // expected-warning-re{{{{^pointer to global variable 'glob'$}}}}
36 clang_analyzer_explain(param); // expected-warning-re{{{{^argument 'param'$}}}}
37 clang_analyzer_explain(ptr); // expected-warning-re{{{{^argument 'ptr'$}}}}
38 if (param == 42)
39 clang_analyzer_explain(param); // expected-warning-re{{{{^signed 32-bit integer '42'$}}}}
40 }
41
test_2(char * ptr,int ext)42 void test_2(char *ptr, int ext) {
43 clang_analyzer_explain((void *) "asdf"); // expected-warning-re{{{{^pointer to element of type 'char' with index 0 of string literal "asdf"$}}}}
44 clang_analyzer_explain(strlen(ptr)); // expected-warning-re{{{{^metadata of type 'unsigned long' tied to pointee of argument 'ptr'$}}}}
45 clang_analyzer_explain(conjure()); // expected-warning-re{{{{^symbol of type 'int' conjured at statement 'conjure\(\)'$}}}}
46 clang_analyzer_explain(glob); // expected-warning-re{{{{^value derived from \(symbol of type 'int' conjured at statement 'conjure\(\)'\) for global variable 'glob'$}}}}
47 clang_analyzer_explain(glob_ptr); // expected-warning-re{{{{^value derived from \(symbol of type 'int' conjured at statement 'conjure\(\)'\) for global variable 'glob_ptr'$}}}}
48 clang_analyzer_explain(clang_analyzer_getExtent(ptr)); // expected-warning-re{{{{^extent of pointee of argument 'ptr'$}}}}
49 int *x = new int[ext];
50 clang_analyzer_explain(x); // expected-warning-re{{{{^pointer to element of type 'int' with index 0 of pointee of symbol of type 'int \*' conjured at statement 'new int \[ext\]'$}}}}
51 // Sic! What gets computed is the extent of the element-region.
52 clang_analyzer_explain(clang_analyzer_getExtent(x)); // expected-warning-re{{{{^signed 32-bit integer '4'$}}}}
53 delete[] x;
54 }
55
test_3(S s)56 void test_3(S s) {
57 clang_analyzer_explain(&s); // expected-warning-re{{{{^pointer to parameter 's'$}}}}
58 clang_analyzer_explain(s.z); // expected-warning-re{{{{^initial value of field 'z' of parameter 's'$}}}}
59 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'$}}}}
60 if (!s.s2[7].x) {
61 clang_analyzer_explain(s.s2[7].x); // expected-warning-re{{{{^concrete memory address '0'$}}}}
62 // FIXME: we need to be explaining '1' rather than '0' here; not explainer bug.
63 clang_analyzer_explain(s.s2[7].x + 1); // expected-warning-re{{{{^concrete memory address '0'$}}}}
64 }
65 }
66
test_4(int x,int y)67 void test_4(int x, int y) {
68 int z;
69 static int stat;
70 clang_analyzer_explain(x + 1); // expected-warning-re{{{{^\(argument 'x'\) \+ 1$}}}}
71 clang_analyzer_explain(1 + y); // expected-warning-re{{{{^\(argument 'y'\) \+ 1$}}}}
72 clang_analyzer_explain(x + y); // expected-warning-re{{{{^unknown value$}}}}
73 clang_analyzer_explain(z); // expected-warning-re{{{{^undefined value$}}}}
74 clang_analyzer_explain(&z); // expected-warning-re{{{{^pointer to local variable 'z'$}}}}
75 clang_analyzer_explain(stat); // expected-warning-re{{{{^signed 32-bit integer '0'$}}}}
76 clang_analyzer_explain(&stat); // expected-warning-re{{{{^pointer to static local variable 'stat'$}}}}
77 clang_analyzer_explain(stat_glob); // expected-warning-re{{{{^initial value of global variable 'stat_glob'$}}}}
78 clang_analyzer_explain(&stat_glob); // expected-warning-re{{{{^pointer to global variable 'stat_glob'$}}}}
79 clang_analyzer_explain((int[]){1, 2, 3}); // expected-warning-re{{{{^pointer to element of type 'int' with index 0 of compound literal \(int \[3\]\)\{1, 2, 3\}$}}}}
80 }
81
82 namespace {
83 class C {
84 int x[10];
85
86 public:
test_5(int i)87 void test_5(int i) {
88 clang_analyzer_explain(this); // expected-warning-re{{{{^pointer to 'this' object$}}}}
89 clang_analyzer_explain(&x[i]); // expected-warning-re{{{{^pointer to element of type 'int' with index 'argument 'i'' of field 'x' of 'this' object$}}}}
90 clang_analyzer_explain(__builtin_alloca(i)); // expected-warning-re{{{{^pointer to region allocated by '__builtin_alloca\(i\)'$}}}}
91 }
92 };
93 } // end of anonymous namespace
94
test_6()95 void test_6() {
96 clang_analyzer_explain(conjure_S()); // expected-warning-re{{{{^lazily frozen compound value of temporary object constructed at statement 'conjure_S\(\)'$}}}}
97 clang_analyzer_explain(conjure_S().z); // expected-warning-re{{{{^value derived from \(symbol of type 'struct S' conjured at statement 'conjure_S\(\)'\) for field 'z' of temporary object constructed at statement 'conjure_S\(\)'$}}}}
98 }
99