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// RUN: %clang_analyze_cc1 -analyzer-checker=unix.StdCLibraryFunctions,debug.ExprInspection -verify %s
// RUN: %clang_analyze_cc1 -triple i686-unknown-linux -analyzer-checker=unix.StdCLibraryFunctions,debug.ExprInspection -verify %s
// RUN: %clang_analyze_cc1 -triple x86_64-unknown-linux -analyzer-checker=unix.StdCLibraryFunctions,debug.ExprInspection -verify %s
// RUN: %clang_analyze_cc1 -triple armv7-a15-linux -analyzer-checker=unix.StdCLibraryFunctions,debug.ExprInspection -verify %s
// RUN: %clang_analyze_cc1 -triple thumbv7-a15-linux -analyzer-checker=unix.StdCLibraryFunctions,debug.ExprInspection -verify %s
void clang_analyzer_eval(int);
int glob;
typedef struct FILE FILE;
#define EOF -1
int getc(FILE *);
void test_getc(FILE *fp) {
int x;
while ((x = getc(fp)) != EOF) {
clang_analyzer_eval(x > 255); // expected-warning{{FALSE}}
clang_analyzer_eval(x >= 0); // expected-warning{{TRUE}}
}
}
int fgetc(FILE *);
void test_fgets(FILE *fp) {
clang_analyzer_eval(fgetc(fp) < 256); // expected-warning{{TRUE}}
clang_analyzer_eval(fgetc(fp) >= 0); // expected-warning{{UNKNOWN}}
}
typedef typeof(sizeof(int)) size_t;
typedef signed long ssize_t;
ssize_t read(int, void *, size_t);
ssize_t write(int, const void *, size_t);
void test_read_write(int fd, char *buf) {
glob = 1;
ssize_t x = write(fd, buf, 10);
clang_analyzer_eval(glob); // expected-warning{{UNKNOWN}}
if (x >= 0) {
clang_analyzer_eval(x <= 10); // expected-warning{{TRUE}}
ssize_t y = read(fd, &glob, sizeof(glob));
if (y >= 0) {
clang_analyzer_eval(y <= sizeof(glob)); // expected-warning{{TRUE}}
} else {
// -1 overflows on promotion!
clang_analyzer_eval(y <= sizeof(glob)); // expected-warning{{FALSE}}
}
} else {
clang_analyzer_eval(x == -1); // expected-warning{{TRUE}}
}
}
size_t fread(void *, size_t, size_t, FILE *);
size_t fwrite(const void *restrict, size_t, size_t, FILE *restrict);
void test_fread_fwrite(FILE *fp, int *buf) {
size_t x = fwrite(buf, sizeof(int), 10, fp);
clang_analyzer_eval(x <= 10); // expected-warning{{TRUE}}
size_t y = fread(buf, sizeof(int), 10, fp);
clang_analyzer_eval(y <= 10); // expected-warning{{TRUE}}
size_t z = fwrite(buf, sizeof(int), y, fp);
// FIXME: should be TRUE once symbol-symbol constraint support is improved.
clang_analyzer_eval(z <= y); // expected-warning{{UNKNOWN}}
}
ssize_t getline(char **, size_t *, FILE *);
void test_getline(FILE *fp) {
char *line = 0;
size_t n = 0;
ssize_t len;
while ((len = getline(&line, &n, fp)) != -1) {
clang_analyzer_eval(len == 0); // expected-warning{{FALSE}}
}
}
int isascii(int);
void test_isascii(int x) {
clang_analyzer_eval(isascii(123)); // expected-warning{{TRUE}}
clang_analyzer_eval(isascii(-1)); // expected-warning{{FALSE}}
if (isascii(x)) {
clang_analyzer_eval(x < 128); // expected-warning{{TRUE}}
clang_analyzer_eval(x >= 0); // expected-warning{{TRUE}}
} else {
if (x > 42)
clang_analyzer_eval(x >= 128); // expected-warning{{TRUE}}
else
clang_analyzer_eval(x < 0); // expected-warning{{TRUE}}
}
glob = 1;
isascii('a');
clang_analyzer_eval(glob); // expected-warning{{TRUE}}
}
int islower(int);
void test_islower(int x) {
clang_analyzer_eval(islower('x')); // expected-warning{{TRUE}}
clang_analyzer_eval(islower('X')); // expected-warning{{FALSE}}
if (islower(x))
clang_analyzer_eval(x < 'a'); // expected-warning{{FALSE}}
}
int getchar(void);
void test_getchar() {
int x = getchar();
if (x == EOF)
return;
clang_analyzer_eval(x < 0); // expected-warning{{FALSE}}
clang_analyzer_eval(x < 256); // expected-warning{{TRUE}}
}
int isalpha(int);
void test_isalpha() {
clang_analyzer_eval(isalpha(']')); // expected-warning{{FALSE}}
clang_analyzer_eval(isalpha('Q')); // expected-warning{{TRUE}}
clang_analyzer_eval(isalpha(128)); // expected-warning{{UNKNOWN}}
}
int isalnum(int);
void test_alnum() {
clang_analyzer_eval(isalnum('1')); // expected-warning{{TRUE}}
clang_analyzer_eval(isalnum(')')); // expected-warning{{FALSE}}
}
int isblank(int);
void test_isblank() {
clang_analyzer_eval(isblank('\t')); // expected-warning{{TRUE}}
clang_analyzer_eval(isblank(' ')); // expected-warning{{TRUE}}
clang_analyzer_eval(isblank('\n')); // expected-warning{{FALSE}}
}
int ispunct(int);
void test_ispunct(int x) {
clang_analyzer_eval(ispunct(' ')); // expected-warning{{FALSE}}
clang_analyzer_eval(ispunct(-1)); // expected-warning{{FALSE}}
clang_analyzer_eval(ispunct('#')); // expected-warning{{TRUE}}
clang_analyzer_eval(ispunct('_')); // expected-warning{{TRUE}}
if (ispunct(x))
clang_analyzer_eval(x < 127); // expected-warning{{TRUE}}
}
int isupper(int);
void test_isupper(int x) {
if (isupper(x))
clang_analyzer_eval(x < 'A'); // expected-warning{{FALSE}}
}
int isgraph(int);
int isprint(int);
void test_isgraph_isprint(int x) {
char y = x;
if (isgraph(y))
clang_analyzer_eval(isprint(x)); // expected-warning{{TRUE}}
}
int isdigit(int);
void test_mixed_branches(int x) {
if (isdigit(x)) {
clang_analyzer_eval(isgraph(x)); // expected-warning{{TRUE}}
clang_analyzer_eval(isblank(x)); // expected-warning{{FALSE}}
} else if (isascii(x)) {
// isalnum() bifurcates here.
clang_analyzer_eval(isalnum(x)); // expected-warning{{TRUE}} // expected-warning{{FALSE}}
clang_analyzer_eval(isprint(x)); // expected-warning{{TRUE}} // expected-warning{{FALSE}}
}
}
int isspace(int);
void test_isspace(int x) {
if (!isascii(x))
return;
char y = x;
if (y == ' ')
clang_analyzer_eval(isspace(x)); // expected-warning{{TRUE}}
}
int isxdigit(int);
void test_isxdigit(int x) {
if (isxdigit(x) && isupper(x)) {
clang_analyzer_eval(x >= 'A'); // expected-warning{{TRUE}}
clang_analyzer_eval(x <= 'F'); // expected-warning{{TRUE}}
}
}
void test_call_by_pointer() {
typedef int (*func)(int);
func f = isascii;
clang_analyzer_eval(f('A')); // expected-warning{{TRUE}}
f = ispunct;
clang_analyzer_eval(f('A')); // expected-warning{{FALSE}}
}
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