[analyzer] Add an experimental ObjC direct ivar assignment checker.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164790 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 56 insertions, 0 deletions

diff --git a/test/Analysis/objc-properties.m b/test/Analysis/objc-properties.m
new file mode 100644
index 0000000000..a25791ea88
--- /dev/null
+++ b/test/Analysis/objc-properties.m
@@ -0,0 +1,56 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=alpha.osx.cocoa.DirectIvarAssignment -fobjc-default-synthesize-properties -Wno-objc-root-class -verify -fblocks %s
+
+@interface MyClass;
+@end
+@interface TestProperty {
+  MyClass *_Z;
+  id _nonSynth;
+}
+
+  @property (assign, nonatomic) MyClass* A; // explicitely synthesized, not implemented, non-default ivar name
+
+  @property (assign) MyClass* X;  // automatically synthesized, not implemented
+
+  @property (assign, nonatomic) MyClass* Y; // automatically synthesized, implemented
+
+  @property (assign, nonatomic) MyClass* Z; // non synthesized, implemented
+  @property (readonly) id nonSynth;  // non synthesized, explicitly implemented to return ivar with expected name
+  
+  - (id) initWithPtr:(MyClass*) value;
+  - (id) myInitWithPtr:(MyClass*) value;
+  - (void) someMethod: (MyClass*)In;
+@end
+
+@implementation TestProperty
+  @synthesize A = __A;
+  
+  - (id) initWithPtr: (MyClass*) value {
+    _Y = value; // no-warning
+    return self;
+  }
+
+  - (id) myInitWithPtr: (MyClass*) value {
+    _Y = value; // no-warning
+    return self;
+  }
+  
+  - (void) setY:(MyClass*) NewValue {
+    _Y = NewValue; // no-warning
+  }
+
+  - (void) setZ:(MyClass*) NewValue {
+    _Z = NewValue; // no-warning
+  }
+
+  - (id)nonSynth {
+      return _nonSynth;
+  }
+
+  - (void) someMethod: (MyClass*)In {
+    __A = In; // expected-warning {{Direct assignment to an instance variable backing a property; use the setter instead}}
+    _X = In; // expected-warning {{Direct assignment to an instance variable backing a property; use the setter instead}}
+    _Y = In; // expected-warning {{Direct assignment to an instance variable backing a property; use the setter instead}}
+    _Z = In; // expected-warning {{Direct assignment to an instance variable backing a property; use the setter instead}}
+    _nonSynth = 0; // expected-warning {{Direct assignment to an instance variable backing a property; use the setter instead}}
+  }
+@end
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