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// RUN: %clang_analyze_cc1 -verify -analyzer-output text %s \
// RUN: -analyzer-checker=core \
// RUN: -analyzer-checker=apiModeling.Errno \
// RUN: -analyzer-checker=debug.ExprInspection \
// RUN: -analyzer-checker=debug.ErrnoTest \
// RUN: -analyzer-checker=alpha.unix.Errno \
// RUN: -DERRNO_VAR
// RUN: %clang_analyze_cc1 -verify -analyzer-output text %s \
// RUN: -analyzer-checker=core \
// RUN: -analyzer-checker=apiModeling.Errno \
// RUN: -analyzer-checker=debug.ExprInspection \
// RUN: -analyzer-checker=debug.ErrnoTest \
// RUN: -analyzer-checker=alpha.unix.Errno \
// RUN: -DERRNO_FUNC
#include "Inputs/errno_var.h"
#include "Inputs/system-header-simulator.h"
#ifdef ERRNO_VAR
#include "Inputs/errno_var.h"
#endif
#ifdef ERRNO_FUNC
#include "Inputs/errno_func.h"
#endif
int ErrnoTesterChecker_setErrnoCheckState();
void something();
void testErrnoCheckUndefRead() {
int X = ErrnoTesterChecker_setErrnoCheckState();
something();
X = ErrnoTesterChecker_setErrnoCheckState(); // expected-note{{Assuming that this function succeeds but sets 'errno' to an unspecified value}}
if (X == 0) { // expected-note{{'X' is equal to 0}}
// expected-note@-1{{Taking true branch}}
if (errno) {
} // expected-warning@-1{{An undefined value may be read from 'errno'}}
// expected-note@-2{{An undefined value may be read from 'errno'}}
}
}
void testErrnoCheckOverwrite() {
int X = ErrnoTesterChecker_setErrnoCheckState();
something();
X = ErrnoTesterChecker_setErrnoCheckState(); // expected-note{{Assuming that this function returns 2. 'errno' should be checked to test for failure}}
if (X == 2) { // expected-note{{'X' is equal to 2}}
// expected-note@-1{{Taking true branch}}
errno = 0; // expected-warning{{Value of 'errno' was not checked and is overwritten here}}
// expected-note@-1{{Value of 'errno' was not checked and is overwritten here}}
}
}
void testErrnoCheckOverwriteStdCall() {
int X = ErrnoTesterChecker_setErrnoCheckState();
something();
X = ErrnoTesterChecker_setErrnoCheckState(); // expected-note{{Assuming that this function returns 2. 'errno' should be checked to test for failure}}
if (X == 2) { // expected-note{{'X' is equal to 2}}
// expected-note@-1{{Taking true branch}}
printf(""); // expected-warning{{Value of 'errno' was not checked and may be overwritten by function 'printf'}}
// expected-note@-1{{Value of 'errno' was not checked and may be overwritten by function 'printf'}}
}
}
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