1 // RUN: %clang_cc1 -analyze -analyzer-checker=unix.StdCLibraryFunctions,debug.ExprInspection -verify %s
2 // RUN: %clang_cc1 -triple i686-unknown-linux -analyze -analyzer-checker=unix.StdCLibraryFunctions,debug.ExprInspection -verify %s
3 // RUN: %clang_cc1 -triple x86_64-unknown-linux -analyze -analyzer-checker=unix.StdCLibraryFunctions,debug.ExprInspection -verify %s
4 // RUN: %clang_cc1 -triple armv7-a15-linux -analyze -analyzer-checker=unix.StdCLibraryFunctions,debug.ExprInspection -verify %s
5 // RUN: %clang_cc1 -triple thumbv7-a15-linux -analyze -analyzer-checker=unix.StdCLibraryFunctions,debug.ExprInspection -verify %s
7 void clang_analyzer_eval(int);
11 typedef struct FILE FILE;
15 void test_getc(FILE *fp) {
17 while ((x = getc(fp)) != EOF) {
18 clang_analyzer_eval(x > 255); // expected-warning{{FALSE}}
19 clang_analyzer_eval(x >= 0); // expected-warning{{TRUE}}
24 void test_fgets(FILE *fp) {
25 clang_analyzer_eval(fgetc(fp) < 256); // expected-warning{{TRUE}}
26 clang_analyzer_eval(fgetc(fp) >= 0); // expected-warning{{UNKNOWN}}
30 typedef typeof(sizeof(int)) size_t;
31 typedef signed long ssize_t;
32 ssize_t read(int, void *, size_t);
33 ssize_t write(int, const void *, size_t);
34 void test_read_write(int fd, char *buf) {
36 ssize_t x = write(fd, buf, 10);
37 clang_analyzer_eval(glob); // expected-warning{{UNKNOWN}}
39 clang_analyzer_eval(x <= 10); // expected-warning{{TRUE}}
40 ssize_t y = read(fd, &glob, sizeof(glob));
42 clang_analyzer_eval(y <= sizeof(glob)); // expected-warning{{TRUE}}
44 // -1 overflows on promotion!
45 clang_analyzer_eval(y <= sizeof(glob)); // expected-warning{{FALSE}}
48 clang_analyzer_eval(x == -1); // expected-warning{{TRUE}}
52 size_t fread(void *, size_t, size_t, FILE *);
53 size_t fwrite(const void *restrict, size_t, size_t, FILE *restrict);
54 void test_fread_fwrite(FILE *fp, int *buf) {
55 size_t x = fwrite(buf, sizeof(int), 10, fp);
56 clang_analyzer_eval(x <= 10); // expected-warning{{TRUE}}
57 size_t y = fread(buf, sizeof(int), 10, fp);
58 clang_analyzer_eval(y <= 10); // expected-warning{{TRUE}}
59 size_t z = fwrite(buf, sizeof(int), y, fp);
60 // FIXME: should be TRUE once symbol-symbol constraint support is improved.
61 clang_analyzer_eval(z <= y); // expected-warning{{UNKNOWN}}
64 ssize_t getline(char **, size_t *, FILE *);
65 void test_getline(FILE *fp) {
69 while ((len = getline(&line, &n, fp)) != -1) {
70 clang_analyzer_eval(len == 0); // expected-warning{{FALSE}}
75 void test_isascii(int x) {
76 clang_analyzer_eval(isascii(123)); // expected-warning{{TRUE}}
77 clang_analyzer_eval(isascii(-1)); // expected-warning{{FALSE}}
79 clang_analyzer_eval(x < 128); // expected-warning{{TRUE}}
80 clang_analyzer_eval(x >= 0); // expected-warning{{TRUE}}
83 clang_analyzer_eval(x >= 128); // expected-warning{{TRUE}}
85 clang_analyzer_eval(x < 0); // expected-warning{{TRUE}}
89 clang_analyzer_eval(glob); // expected-warning{{TRUE}}
93 void test_islower(int x) {
94 clang_analyzer_eval(islower('x')); // expected-warning{{TRUE}}
95 clang_analyzer_eval(islower('X')); // expected-warning{{FALSE}}
97 clang_analyzer_eval(x < 'a'); // expected-warning{{FALSE}}
101 void test_getchar() {
105 clang_analyzer_eval(x < 0); // expected-warning{{FALSE}}
106 clang_analyzer_eval(x < 256); // expected-warning{{TRUE}}
110 void test_isalpha() {
111 clang_analyzer_eval(isalpha(']')); // expected-warning{{FALSE}}
112 clang_analyzer_eval(isalpha('Q')); // expected-warning{{TRUE}}
113 clang_analyzer_eval(isalpha(128)); // expected-warning{{UNKNOWN}}
118 clang_analyzer_eval(isalnum('1')); // expected-warning{{TRUE}}
119 clang_analyzer_eval(isalnum(')')); // expected-warning{{FALSE}}
123 void test_isblank() {
124 clang_analyzer_eval(isblank('\t')); // expected-warning{{TRUE}}
125 clang_analyzer_eval(isblank(' ')); // expected-warning{{TRUE}}
126 clang_analyzer_eval(isblank('\n')); // expected-warning{{FALSE}}
130 void test_ispunct(int x) {
131 clang_analyzer_eval(ispunct(' ')); // expected-warning{{FALSE}}
132 clang_analyzer_eval(ispunct(-1)); // expected-warning{{FALSE}}
133 clang_analyzer_eval(ispunct('#')); // expected-warning{{TRUE}}
134 clang_analyzer_eval(ispunct('_')); // expected-warning{{TRUE}}
136 clang_analyzer_eval(x < 127); // expected-warning{{TRUE}}
140 void test_isupper(int x) {
142 clang_analyzer_eval(x < 'A'); // expected-warning{{FALSE}}
147 void test_isgraph_isprint(int x) {
150 clang_analyzer_eval(isprint(x)); // expected-warning{{TRUE}}
154 void test_mixed_branches(int x) {
156 clang_analyzer_eval(isgraph(x)); // expected-warning{{TRUE}}
157 clang_analyzer_eval(isblank(x)); // expected-warning{{FALSE}}
158 } else if (isascii(x)) {
159 // isalnum() bifurcates here.
160 clang_analyzer_eval(isalnum(x)); // expected-warning{{TRUE}} // expected-warning{{FALSE}}
161 clang_analyzer_eval(isprint(x)); // expected-warning{{TRUE}} // expected-warning{{FALSE}}
166 void test_isspace(int x) {
171 clang_analyzer_eval(isspace(x)); // expected-warning{{TRUE}}
175 void test_isxdigit(int x) {
176 if (isxdigit(x) && isupper(x)) {
177 clang_analyzer_eval(x >= 'A'); // expected-warning{{TRUE}}
178 clang_analyzer_eval(x <= 'F'); // expected-warning{{TRUE}}
182 void test_call_by_pointer() {
183 typedef int (*func)(int);
185 clang_analyzer_eval(f('A')); // expected-warning{{TRUE}}
187 clang_analyzer_eval(f('A')); // expected-warning{{FALSE}}