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