140 lines
3.8 KiB
Objective-C
140 lines
3.8 KiB
Objective-C
// RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -analyzer-store=region -fblocks -verify -Wno-objc-root-class %s
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void clang_analyzer_eval(int);
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@interface Root {
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@public
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int uniqueID;
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}
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- (void)refreshID;
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@end
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void testInvalidation(Root *obj) {
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int savedID = obj->uniqueID;
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clang_analyzer_eval(savedID == obj->uniqueID); // expected-warning{{TRUE}}
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[obj refreshID];
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clang_analyzer_eval(savedID == obj->uniqueID); // expected-warning{{UNKNOWN}}
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}
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@interface Child : Root
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@end
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@implementation Child
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- (void)testSuperInvalidation {
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int savedID = self->uniqueID;
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clang_analyzer_eval(savedID == self->uniqueID); // expected-warning{{TRUE}}
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[super refreshID];
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clang_analyzer_eval(savedID == self->uniqueID); // expected-warning{{UNKNOWN}}
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}
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@end
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@interface ManyIvars {
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struct S { int a, b; } s;
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int c;
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int d;
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}
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@end
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struct S makeS();
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@implementation ManyIvars
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- (void)testMultipleIvarInvalidation:(int)useConstraints {
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if (useConstraints) {
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if (s.a != 1) return;
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if (s.b != 2) return;
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if (c != 3) return;
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if (d != 4) return;
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return;
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} else {
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s.a = 1;
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s.b = 2;
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c = 3;
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d = 4;
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}
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clang_analyzer_eval(s.a == 1); // expected-warning{{TRUE}}
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clang_analyzer_eval(s.b == 2); // expected-warning{{TRUE}}
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clang_analyzer_eval(c == 3); // expected-warning{{TRUE}}
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clang_analyzer_eval(d == 4); // expected-warning{{TRUE}}
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d = 0;
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clang_analyzer_eval(s.a == 1); // expected-warning{{TRUE}}
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clang_analyzer_eval(s.b == 2); // expected-warning{{TRUE}}
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clang_analyzer_eval(c == 3); // expected-warning{{TRUE}}
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clang_analyzer_eval(d == 0); // expected-warning{{TRUE}}
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d = 4;
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s = makeS();
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clang_analyzer_eval(s.a == 1); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(s.b == 2); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(c == 3); // expected-warning{{TRUE}}
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clang_analyzer_eval(d == 4); // expected-warning{{TRUE}}
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s.a = 1;
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clang_analyzer_eval(s.a == 1); // expected-warning{{TRUE}}
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clang_analyzer_eval(s.b == 2); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(c == 3); // expected-warning{{TRUE}}
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clang_analyzer_eval(d == 4); // expected-warning{{TRUE}}
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}
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+ (void)testMultipleIvarInvalidation:(int)useConstraints
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forObject:(ManyIvars *)obj {
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if (useConstraints) {
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if (obj->s.a != 1) return;
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if (obj->s.b != 2) return;
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if (obj->c != 3) return;
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if (obj->d != 4) return;
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return;
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} else {
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obj->s.a = 1;
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obj->s.b = 2;
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obj->c = 3;
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obj->d = 4;
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}
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clang_analyzer_eval(obj->s.a == 1); // expected-warning{{TRUE}}
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clang_analyzer_eval(obj->s.b == 2); // expected-warning{{TRUE}}
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clang_analyzer_eval(obj->c == 3); // expected-warning{{TRUE}}
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clang_analyzer_eval(obj->d == 4); // expected-warning{{TRUE}}
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obj->d = 0;
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clang_analyzer_eval(obj->s.a == 1); // expected-warning{{TRUE}}
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clang_analyzer_eval(obj->s.b == 2); // expected-warning{{TRUE}}
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clang_analyzer_eval(obj->c == 3); // expected-warning{{TRUE}}
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clang_analyzer_eval(obj->d == 0); // expected-warning{{TRUE}}
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obj->d = 4;
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obj->s = makeS();
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clang_analyzer_eval(obj->s.a == 1); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(obj->s.b == 2); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(obj->c == 3); // expected-warning{{TRUE}}
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clang_analyzer_eval(obj->d == 4); // expected-warning{{TRUE}}
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obj->s.a = 1;
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clang_analyzer_eval(obj->s.a == 1); // expected-warning{{TRUE}}
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clang_analyzer_eval(obj->s.b == 2); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(obj->c == 3); // expected-warning{{TRUE}}
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clang_analyzer_eval(obj->d == 4); // expected-warning{{TRUE}}
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}
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@end
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int testNull(Root *obj) {
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if (obj) return 0;
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int *x = &obj->uniqueID;
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return *x; // expected-warning{{Dereference of null pointer (loaded from variable 'x')}}
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}
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