array-struct-region.c revision 752bee2493ec2931bd18899753552e3a47dc85fe
1// RUN: %clang_cc1 -analyze -analyzer-checker=core,experimental.core,debug.ExprInspection -analyzer-store=region -analyzer-constraints=basic -analyzer-ipa=all -verify %s 2// RUN: %clang_cc1 -analyze -analyzer-checker=core,experimental.core,debug.ExprInspection -analyzer-store=region -analyzer-constraints=range -analyzer-ipa=all -verify %s 3 4void clang_analyzer_eval(int); 5 6int string_literal_init() { 7 char a[] = "abc"; 8 char b[2] = "abc"; // expected-warning{{too long}} 9 char c[5] = "abc"; 10 11 clang_analyzer_eval(a[1] == 'b'); // expected-warning{{TRUE}} 12 clang_analyzer_eval(b[1] == 'b'); // expected-warning{{TRUE}} 13 clang_analyzer_eval(c[1] == 'b'); // expected-warning{{TRUE}} 14 15 clang_analyzer_eval(a[3] == 0); // expected-warning{{TRUE}} 16 clang_analyzer_eval(c[3] == 0); // expected-warning{{TRUE}} 17 18 clang_analyzer_eval(c[4] == 0); // expected-warning{{TRUE}} 19 20 return 42; 21} 22 23void nested_compound_literals(int rad) { 24 int vec[6][2] = {{0.195, 0.02}, {0.383, 0.067}, {0.55, 0.169}, // expected-warning 6 {{implicit conversion from 'double' to 'int' changes value from}} 25 {0.831, 0.45}, {0.924, 0.617}, {0.98, 0.805}}; // expected-warning 6 {{implicit conversion from 'double' to 'int' changes value from}} 26 int a; 27 28 for (a = 0; a < 6; ++a) { 29 vec[a][0] *= rad; // no-warning 30 vec[a][1] *= rad; // no-warning 31 } 32} 33 34void nested_compound_literals_float(float rad) { 35 float vec[6][2] = {{0.195, 0.02}, {0.383, 0.067}, {0.55, 0.169}, 36 {0.831, 0.45}, {0.924, 0.617}, {0.98, 0.805}}; 37 int a; 38 39 for (a = 0; a < 6; ++a) { 40 vec[a][0] *= rad; // no-warning 41 vec[a][1] *= rad; // no-warning 42 } 43} 44 45 46void struct_as_array() { 47 struct simple { int x; int y; }; 48 struct simple a; 49 struct simple *p = &a; 50 51 p->x = 5; 52 clang_analyzer_eval(a.x == 5); // expected-warning{{TRUE}} 53 clang_analyzer_eval(p[0].x == 5); // expected-warning{{TRUE}} 54 55 p[0].y = 5; 56 clang_analyzer_eval(a.y == 5); // expected-warning{{TRUE}} 57 clang_analyzer_eval(p->y == 5); // expected-warning{{TRUE}} 58} 59 60 61// PR13264 / <rdar://problem/11802440> 62struct point { int x; int y; }; 63struct circle { struct point o; int r; }; 64struct circle get_circle() { 65 struct circle result; 66 result.r = 5; 67 result.o = (struct point){0, 0}; 68 return result; 69} 70 71void struct_in_struct() { 72 struct circle c; 73 c = get_circle(); 74 // This used to think c.r was undefined because c.o is a LazyCompoundVal. 75 clang_analyzer_eval(c.r == 5); // expected-warning{{TRUE}} 76} 77 78// We also test with floats because we don't model floats right now, 79// and the original bug report used a float. 80struct circle_f { struct point o; float r; }; 81struct circle_f get_circle_f() { 82 struct circle_f result; 83 result.r = 5.0; 84 result.o = (struct point){0, 0}; 85 return result; 86} 87 88float struct_in_struct_f() { 89 struct circle_f c; 90 c = get_circle_f(); 91 92 return c.r; // no-warning 93} 94 95