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// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-ipa=inlining -analyzer-output=text -verify %s
void zero(int **p) {
*p = 0;
// expected-note@-1 {{Null pointer value stored to 'a'}}
}
void testZero(int *a) {
zero(&a);
// expected-note@-1 {{Calling 'zero'}}
// expected-note@-2 {{Returning from 'zero'}}
*a = 1; // expected-warning{{Dereference of null pointer}}
// expected-note@-1 {{Dereference of null pointer (loaded from variable 'a')}}
}
void check(int *p) {
if (p) {
// expected-note@-1 + {{Assuming 'p' is null}}
// expected-note@-2 + {{Assuming pointer value is null}}
// expected-note@-3 + {{Taking false branch}}
return;
}
return;
}
void testCheck(int *a) {
check(a);
// expected-note@-1 {{Calling 'check'}}
// expected-note@-2 {{Returning from 'check'}}
*a = 1; // expected-warning{{Dereference of null pointer}}
// expected-note@-1 {{Dereference of null pointer (loaded from variable 'a')}}
}
int *getPointer();
void testInitCheck() {
int *a = getPointer();
// expected-note@-1 {{Variable 'a' initialized here}}
check(a);
// expected-note@-1 {{Calling 'check'}}
// expected-note@-2 {{Returning from 'check'}}
*a = 1; // expected-warning{{Dereference of null pointer}}
// expected-note@-1 {{Dereference of null pointer (loaded from variable 'a')}}
}
void testStoreCheck(int *a) {
a = getPointer();
// expected-note@-1 {{Value assigned to 'a'}}
check(a);
// expected-note@-1 {{Calling 'check'}}
// expected-note@-2 {{Returning from 'check'}}
*a = 1; // expected-warning{{Dereference of null pointer}}
// expected-note@-1 {{Dereference of null pointer (loaded from variable 'a')}}
}
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