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// RUN: %clang_analyze_cc1 -analyzer-checker=core,unix.Stream,unix.Errno,unix.StdCLibraryFunctions,debug.ExprInspection \
// RUN: -analyzer-config unix.Stream:Pedantic=true \
// RUN: -analyzer-config unix.StdCLibraryFunctions:ModelPOSIX=true -verify %s
#include "Inputs/system-header-simulator.h"
#include "Inputs/errno_func.h"
extern void clang_analyzer_eval(int);
extern void clang_analyzer_dump(int);
extern void clang_analyzer_printState();
void check_fopen(void) {
FILE *F = fopen("xxx", "r");
if (!F) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
return;
}
if (errno) {} // expected-warning{{An undefined value may be read from 'errno' [unix.Errno]}}
}
void check_fdopen(int Fd) {
FILE *F = fdopen(Fd, "r");
if (!F) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
} else {
if (errno) {} // expected-warning{{An undefined value may be read from 'errno' [unix.Errno]}}
}
}
void check_tmpfile(void) {
FILE *F = tmpfile();
if (!F) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
return;
}
if (errno) {} // expected-warning{{An undefined value may be read from 'errno' [unix.Errno]}}
}
void check_freopen(void) {
FILE *F = tmpfile();
if (!F)
return;
F = freopen("xxx", "w", F);
if (!F) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
return;
}
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
void check_fclose(void) {
FILE *F = tmpfile();
if (!F)
return;
int Ret = fclose(F);
if (Ret == EOF) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
return;
}
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
void check_fread_size0(void) {
char Buf[10];
FILE *F = tmpfile();
if (!F)
return;
fread(Buf, 0, 1, F);
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
void check_fread_nmemb0(void) {
char Buf[10];
FILE *F = tmpfile();
if (!F)
return;
fread(Buf, 1, 0, F);
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
void check_fread(void) {
char Buf[10];
FILE *F = tmpfile();
if (!F)
return;
int R = fread(Buf, 1, 10, F);
if (R < 10) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
fclose(F);
return;
}
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
void check_fwrite_size0(void) {
char Buf[] = "0123456789";
FILE *F = tmpfile();
if (!F)
return;
fwrite(Buf, 0, 1, F);
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
void check_fwrite_nmemb0(void) {
char Buf[] = "0123456789";
FILE *F = tmpfile();
if (!F)
return;
fwrite(Buf, 1, 0, F);
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
void check_fwrite(void) {
char Buf[] = "0123456789";
FILE *F = tmpfile();
if (!F)
return;
int R = fwrite(Buf, 1, 10, F);
if (R < 10) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
fclose(F);
return;
}
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
void check_fseek(void) {
FILE *F = tmpfile();
if (!F)
return;
int S = fseek(F, 11, SEEK_SET);
if (S != 0) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
clang_analyzer_eval(S == -1); // expected-warning{{TRUE}}
if (errno) {} // no-warning
fclose(F);
return;
}
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
void check_fseeko(void) {
FILE *F = tmpfile();
if (!F)
return;
int S = fseeko(F, 11, SEEK_SET);
if (S == -1) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
} else {
clang_analyzer_eval(S == 0); // expected-warning{{TRUE}}
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
fclose(F);
}
void check_no_errno_change(void) {
FILE *F = tmpfile();
if (!F)
return;
errno = 1;
clearerr(F);
if (errno) {} // no-warning
feof(F);
if (errno) {} // no-warning
ferror(F);
if (errno) {} // no-warning
fileno(F);
if (errno) {} // no-warning
clang_analyzer_eval(errno == 1); // expected-warning{{TRUE}}
fclose(F);
}
void check_fgetpos(void) {
FILE *F = tmpfile();
if (!F)
return;
errno = 0;
fpos_t Pos;
int Ret = fgetpos(F, &Pos);
if (Ret)
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
else
clang_analyzer_eval(errno == 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
fclose(F);
}
void check_fsetpos(void) {
FILE *F = tmpfile();
if (!F)
return;
errno = 0;
fpos_t Pos;
int Ret = fsetpos(F, &Pos);
if (Ret)
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
else
clang_analyzer_eval(errno == 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
fclose(F);
}
void check_ftell(void) {
FILE *F = tmpfile();
if (!F)
return;
errno = 0;
long Ret = ftell(F);
if (Ret == -1) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
} else {
clang_analyzer_eval(errno == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(Ret >= 0); // expected-warning{{TRUE}}
}
if (errno) {} // no-warning
fclose(F);
}
void check_ftello(void) {
FILE *F = tmpfile();
if (!F)
return;
off_t Ret = ftello(F);
if (Ret >= 0) {
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
} else {
clang_analyzer_eval(Ret == -1); // expected-warning{{TRUE}}
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
}
fclose(F);
}
void check_rewind(void) {
FILE *F = tmpfile();
if (!F)
return;
errno = 0;
rewind(F);
clang_analyzer_eval(errno == 0);
// expected-warning@-1{{FALSE}}
// expected-warning@-2{{TRUE}}
fclose(F);
}
void check_fflush_opened_file(void) {
FILE *F = tmpfile();
if (!F)
return;
int N = fflush(F);
if (N == EOF) {
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
} else {
clang_analyzer_eval(N == 0); // expected-warning{{TRUE}}
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
}
fclose(F);
}
void check_fflush_all(void) {
int N = fflush(NULL);
if (N == 0) {
if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}}
} else {
clang_analyzer_eval(N == EOF); // expected-warning{{TRUE}}
clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
if (errno) {} // no-warning
}
}
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