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// 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{{Taking false branch}}
*var = 1;
return 0;
}
return 1; // expected-note{{Returning without writing to '*var'}}
}
@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{{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{{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
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