[retain cycles] Example of a cycle that includes a C++ class

Reviewed By: mbouaziz

Differential Revision: D7213885

fbshipit-source-id: e460f6a

infer/tests/codetoanalyze/objcpp/errors/Makefile

@@ -0,0 +1,18 @@
+# Copyright (c) 2016 - present Facebook, Inc.
+# All rights reserved.
+#
+# This source code is licensed under the BSD style license found in the
+# LICENSE file in the root directory of this source tree. An additional grant
+# of patent rights can be found in the PATENTS file in the same directory.
+
+TESTS_DIR = ../../..
+
+ANALYZER = checkers
+CLANG_OPTIONS = -x objective-c++ -std=c++11 -fobjc-arc -c
+INFER_OPTIONS = --biabduction-only --no-filtering --debug-exceptions --project-root $(TESTS_DIR) 
+INFERPRINT_OPTIONS = --issues-tests
+
+SOURCES = \
+  $(wildcard */*.mm) \
+
+include $(TESTS_DIR)/clang.make

infer/tests/codetoanalyze/objcpp/errors/issues.exp

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+codetoanalyze/objcpp/errors/retain_cycles/RetainCycleWithStruct.mm, main_bad, 2, RETAIN_CYCLE, [start of procedure main_bad(),start of procedure tracer,start of procedure _State,return from a call to _State__State,start of procedure initWithAnimation:,Condition is true,return from a call to Tracer_initWithAnimation:,return from a call to Animation_tracer]

infer/tests/codetoanalyze/objcpp/errors/retain_cycles/RetainCycleWithStruct.mm

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2018 - present Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+#import <Foundation/NSObject.h>
+
+@class Tracer;
+
+struct _State {
+  Tracer* tracer;
+
+  virtual ~_State() { tracer = nil; }
+};
+
+@interface Animation : NSObject
+- (Tracer*)tracer;
+@end
+
+@interface Animation () {
+ @public
+  struct _State* _state;
+}
+
+@end
+
+@interface Tracer : NSObject
+- (instancetype)initWithAnimation:(Animation*)a;
+@end
+
+@implementation Animation
+
+- (Tracer*)tracer {
+  _state = new _State();
+  _state->tracer = [[Tracer alloc] initWithAnimation:self];
+  return _state->tracer;
+}
+
+- (void)dealloc {
+  NSLog(@"dealloc Animation");
+}
+
+@end
+
+@implementation Tracer {
+  _State* _state;
+}
+
+- (id)initWithAnimation:(Animation*)a {
+  self = [super init];
+  if (nil != self) {
+    _state = a->_state;
+  }
+  return self;
+}
+
+- (void)dealloc {
+  NSLog(@"dealloc Tracer");
+}
+@end
+
+int main_bad() {
+  Animation* a = [Animation new];
+  Tracer* tracer = [a tracer];
+  return 0;
+}