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// RUN: %clang_analyze_cc1 -verify -analyzer-output text %s \
// RUN: -analyzer-checker=core \
// RUN: -analyzer-checker=debug.ExprInspection \
// RUN: -analyzer-checker=unix.StdCLibraryFunctions \
// RUN: -analyzer-checker=apiModeling.Errno \
// RUN: -analyzer-checker=unix.Errno \
// RUN: -analyzer-config unix.StdCLibraryFunctions:ModelPOSIX=true
#include "Inputs/errno_var.h"
int access(const char *path, int amode);
void clang_analyzer_warnIfReached();
void test1() {
access("path", 0);
access("path", 0);
// expected-note@-1{{Assuming that 'access' is successful; 'errno' becomes undefined after the call}}
if (errno != 0) {
// expected-warning@-1{{An undefined value may be read from 'errno'}}
// expected-note@-2{{An undefined value may be read from 'errno'}}
}
}
void test2() {
if (access("path", 0) == -1) {
// expected-note@-1{{Taking true branch}}
// Failure path.
if (errno != 0) {
// expected-note@-1{{'errno' is not equal to 0}}
// expected-note@-2{{Taking true branch}}
clang_analyzer_warnIfReached(); // expected-note {{REACHABLE}} expected-warning {{REACHABLE}}
} else {
clang_analyzer_warnIfReached(); // no-warning: We are on the failure path.
}
}
}
void test3() {
if (access("path", 0) != -1) {
// Success path.
// expected-note@-2{{Assuming that 'access' is successful; 'errno' becomes undefined after the call}}
// expected-note@-3{{Taking true branch}}
if (errno != 0) {
// expected-warning@-1{{An undefined value may be read from 'errno'}}
// expected-note@-2{{An undefined value may be read from 'errno'}}
}
}
}
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