CFDateGC.m revision e3f3825bd82f84f2a1ae0a02274a33298bb720b3 
1// RUN: %clang_cc1 -analyze -analyzer-checker=core,osx.cocoa.RetainCount -analyzer-store=region -analyzer-constraints=range -verify -fobjc-gc %s  -Wno-implicit-function-declaration
2
3//===----------------------------------------------------------------------===//
4// The following code is reduced using delta-debugging from
5// Foundation.h and CoreFoundation.h (Mac OS X).
6//
7// It includes the basic definitions for the test cases below.
8// Not directly including [Core]Foundation.h directly makes this test case 
9// both svelte and portable to non-Mac platforms.
10//===----------------------------------------------------------------------===//
11
12typedef const void * CFTypeRef;
13void CFRelease(CFTypeRef cf);
14CFTypeRef CFRetain(CFTypeRef cf);
15CFTypeRef CFMakeCollectable(CFTypeRef cf);
16typedef const struct __CFAllocator * CFAllocatorRef;
17typedef double CFTimeInterval;
18typedef CFTimeInterval CFAbsoluteTime;
19typedef const struct __CFDate * CFDateRef;
20extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at);
21extern CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate);
22typedef struct objc_object {} *id;
23typedef signed char BOOL;
24static __inline__ __attribute__((always_inline)) id NSMakeCollectable(CFTypeRef cf) { return 0; }
25@protocol NSObject  - (BOOL)isEqual:(id)object;
26- (oneway void)release;
27- (id)retain;
28@end
29@class NSArray;
30
31//===----------------------------------------------------------------------===//
32// Test cases.
33//===----------------------------------------------------------------------===//
34
35CFAbsoluteTime CFAbsoluteTimeGetCurrent();
36
37CFAbsoluteTime f1_use_after_release() {
38  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
39  CFDateRef date = CFDateCreate(0, t);
40  CFRetain(date);
41  [NSMakeCollectable(date) release];
42  CFDateGetAbsoluteTime(date); // no-warning
43  CFRelease(date);
44  t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released}}
45  return t;
46}
47
48// The following two test cases verifies that CFMakeCollectable is a no-op
49// in non-GC mode and a "release" in GC mode.
50CFAbsoluteTime f2_use_after_release() {
51  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
52  CFDateRef date = CFDateCreate(0, t);
53  CFRetain(date);
54  [(id) CFMakeCollectable(date) release];
55  CFDateGetAbsoluteTime(date); // no-warning
56  CFRelease(date);
57  t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released}}
58  return t;
59}
60
61CFAbsoluteTime f2_noleak() {
62  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
63  CFDateRef date = CFDateCreate(0, t);
64  CFRetain(date);
65  [(id) CFMakeCollectable(date) release];
66  CFDateGetAbsoluteTime(date); // no-warning
67  t = CFDateGetAbsoluteTime(date);  // no-warning
68  CFRelease(date); // no-warning
69  return t;
70}
71
72void f3_leak_with_gc() {
73  CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); // expected-warning 2 {{leak}}
74  [[(id) date retain] release];
75}
76
77// The following test case verifies that we "stop tracking" a retained object
78// when it is passed as an argument to an implicitly defined function.
79CFAbsoluteTime f4() {
80  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
81  CFDateRef date = CFDateCreate(0, t);
82  CFRetain(date);
83  some_implicitly_defined_function_stop_tracking(date); // no-warning
84  return t;
85}
86