Merge branch 'master' of ssh://bitbucket.org/czan/honours

1 files changed, 86 insertions, 0 deletions

diff --git a/clang/test/Analysis/CFDateGC.m b/clang/test/Analysis/CFDateGC.m
new file mode 100644
index 0000000..4884bb9
--- /dev/null
+++ b/clang/test/Analysis/CFDateGC.m
@@ -0,0 +1,86 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,osx.cocoa.RetainCount -analyzer-store=region -analyzer-constraints=basic -verify -fobjc-gc %s  -Wno-implicit-function-declaration
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,osx.cocoa.RetainCount -analyzer-store=region -analyzer-constraints=range -verify -fobjc-gc %s  -Wno-implicit-function-declaration
+
+//===----------------------------------------------------------------------===//
+// The following code is reduced using delta-debugging from
+// Foundation.h and CoreFoundation.h (Mac OS X).
+//
+// It includes the basic definitions for the test cases below.
+// Not directly including [Core]Foundation.h directly makes this test case 
+// both svelte and portable to non-Mac platforms.
+//===----------------------------------------------------------------------===//
+
+typedef const void * CFTypeRef;
+void CFRelease(CFTypeRef cf);
+CFTypeRef CFRetain(CFTypeRef cf);
+CFTypeRef CFMakeCollectable(CFTypeRef cf);
+typedef const struct __CFAllocator * CFAllocatorRef;
+typedef double CFTimeInterval;
+typedef CFTimeInterval CFAbsoluteTime;
+typedef const struct __CFDate * CFDateRef;
+extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at);
+extern CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate);
+typedef struct objc_object {} *id;
+typedef signed char BOOL;
+static __inline__ __attribute__((always_inline)) id NSMakeCollectable(CFTypeRef cf) { return 0; }
+@protocol NSObject  - (BOOL)isEqual:(id)object;
+- (oneway void)release;
+- (id)retain;
+@end
+@class NSArray;
+
+//===----------------------------------------------------------------------===//
+// Test cases.
+//===----------------------------------------------------------------------===//
+
+CFAbsoluteTime CFAbsoluteTimeGetCurrent();
+
+CFAbsoluteTime f1_use_after_release() {
+  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
+  CFDateRef date = CFDateCreate(0, t);
+  CFRetain(date);
+  [NSMakeCollectable(date) release];
+  CFDateGetAbsoluteTime(date); // no-warning
+  CFRelease(date);
+  t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released}}
+  return t;
+}
+
+// The following two test cases verifies that CFMakeCollectable is a no-op
+// in non-GC mode and a "release" in GC mode.
+CFAbsoluteTime f2_use_after_release() {
+  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
+  CFDateRef date = CFDateCreate(0, t);
+  CFRetain(date);
+  [(id) CFMakeCollectable(date) release];
+  CFDateGetAbsoluteTime(date); // no-warning
+  CFRelease(date);
+  t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released}}
+  return t;
+}
+
+CFAbsoluteTime f2_noleak() {
+  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
+  CFDateRef date = CFDateCreate(0, t);
+  CFRetain(date);
+  [(id) CFMakeCollectable(date) release];
+  CFDateGetAbsoluteTime(date); // no-warning
+  t = CFDateGetAbsoluteTime(date);  // no-warning
+  CFRelease(date); // no-warning
+  return t;
+}
+
+void f3_leak_with_gc() {
+  CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); // expected-warning 2 {{leak}}
+  [[(id) date retain] release];
+}
+
+// The following test case verifies that we "stop tracking" a retained object
+// when it is passed as an argument to an implicitly defined function.
+CFAbsoluteTime f4() {
+  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
+  CFDateRef date = CFDateCreate(0, t);
+  CFRetain(date);
+  some_implicitly_defined_function_stop_tracking(date); // no-warning
+  return t;
+}