110 lines
4.3 KiB
Objective-C
110 lines
4.3 KiB
Objective-C
// RUN: %clang_analyze_cc1 -x objective-c -analyzer-checker=core,nullability -analyzer-output=text -Wno-objc-root-class -fblocks -verify %s
|
|
|
|
#include "../Inputs/system-header-simulator-for-nullability.h"
|
|
|
|
extern int coin();
|
|
|
|
@interface I : NSObject
|
|
- (int)initVar:(int *)var param:(int)param;
|
|
@end
|
|
|
|
@implementation I
|
|
- (int)initVar:(int *)var param:(int)param {
|
|
if (param) { // expected-note{{'param' is 0}}
|
|
// expected-note@-1{{Taking false branch}}
|
|
*var = 1;
|
|
return 0;
|
|
}
|
|
return 1; // expected-note{{Returning without writing to '*var'}}
|
|
// expected-note@-1{{Returning the value 1, which participates in a condition later}}
|
|
}
|
|
@end
|
|
|
|
int foo(I *i) {
|
|
int x; //expected-note{{'x' declared without an initial value}}
|
|
int out = [i initVar:&x param:0]; //expected-note{{Calling 'initVar:param:'}}
|
|
//expected-note@-1{{Returning from 'initVar:param:'}}
|
|
if (out) //expected-note{{'out' is 1}}
|
|
//expected-note@-1{{Taking true branch}}
|
|
return x; //expected-warning{{Undefined or garbage value returned to caller}}
|
|
//expected-note@-1{{Undefined or garbage value returned to caller}}
|
|
return 0;
|
|
}
|
|
|
|
int initializer1(int *p, int x) {
|
|
if (x) { // expected-note{{'x' is 0}}
|
|
// expected-note@-1{{Taking false branch}}
|
|
*p = 1;
|
|
return 0;
|
|
} else {
|
|
return 1; // expected-note {{Returning without writing to '*p'}}
|
|
}
|
|
}
|
|
|
|
int initFromBlock() {
|
|
__block int z;
|
|
^{ // expected-note {{Calling anonymous block}}
|
|
int p; // expected-note{{'p' declared without an initial value}}
|
|
initializer1(&p, 0); // expected-note{{Calling 'initializer1'}}
|
|
// expected-note@-1{{Returning from 'initializer1'}}
|
|
z = p; // expected-warning{{Assigned value is garbage or undefined}}
|
|
// expected-note@-1{{Assigned value is garbage or undefined}}
|
|
}();
|
|
return z;
|
|
}
|
|
|
|
extern void expectNonNull(NSString * _Nonnull a);
|
|
|
|
@interface A : NSObject
|
|
- (void) initAMaybe;
|
|
@end
|
|
|
|
@implementation A {
|
|
NSString * a;
|
|
}
|
|
|
|
- (void) initAMaybe {
|
|
if (coin()) // expected-note{{Assuming the condition is false}}
|
|
// expected-note@-1{{Taking false branch}}
|
|
a = @"string";
|
|
} // expected-note{{Returning without writing to 'self->a'}}
|
|
|
|
- (void) passNullToNonnull {
|
|
a = nil; // expected-note{{nil object reference stored to 'a'}}
|
|
[self initAMaybe]; // expected-note{{Calling 'initAMaybe'}}
|
|
// expected-note@-1{{Returning from 'initAMaybe'}}
|
|
expectNonNull(a); // expected-warning{{nil passed to a callee that requires a non-null 1st parameter}}
|
|
// expected-note@-1{{nil passed to a callee that requires a non-null 1st parameter}}
|
|
}
|
|
|
|
- (void) initAMaybeWithExplicitSelf {
|
|
if (coin()) // expected-note{{Assuming the condition is false}}
|
|
// expected-note@-1{{Taking false branch}}
|
|
self->a = @"string";
|
|
} // expected-note{{Returning without writing to 'self->a'}}
|
|
|
|
- (void) passNullToNonnullWithExplicitSelf {
|
|
self->a = nil; // expected-note{{nil object reference stored to 'a'}}
|
|
[self initAMaybeWithExplicitSelf]; // expected-note{{Calling 'initAMaybeWithExplicitSelf'}}
|
|
// expected-note@-1{{Returning from 'initAMaybeWithExplicitSelf'}}
|
|
expectNonNull(a); // expected-warning{{nil passed to a callee that requires a non-null 1st parameter}}
|
|
// expected-note@-1{{nil passed to a callee that requires a non-null 1st parameter}}
|
|
}
|
|
|
|
- (void) initPassedAMaybe:(A *) param {
|
|
if (coin()) // expected-note{{Assuming the condition is false}}
|
|
// expected-note@-1{{Taking false branch}}
|
|
param->a = @"string";
|
|
} // expected-note{{Returning without writing to 'param->a'}}
|
|
|
|
- (void) useInitPassedAMaybe:(A *) paramA {
|
|
paramA->a = nil; // expected-note{{nil object reference stored to 'a'}}
|
|
[self initPassedAMaybe:paramA]; // expected-note{{Calling 'initPassedAMaybe:'}}
|
|
// expected-note@-1{{Returning from 'initPassedAMaybe:'}}
|
|
expectNonNull(paramA->a); // expected-warning{{nil passed to a callee that requires a non-null 1st parameter}}
|
|
// expected-note@-1{{nil passed to a callee that requires a non-null 1st parameter}}
|
|
|
|
}
|
|
|
|
@end
|