Add the clang library to the repo (with some of my changes, too).

1 files changed, 220 insertions, 0 deletions

diff --git a/clang/test/Analysis/objc-arc.m b/clang/test/Analysis/objc-arc.m
new file mode 100644
index 0000000..e6c6ab5
--- /dev/null
+++ b/clang/test/Analysis/objc-arc.m
@@ -0,0 +1,220 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-checker=core,osx.cocoa.RetainCount,deadcode -analyzer-store=region -verify -fblocks  -analyzer-opt-analyze-nested-blocks -fobjc-arc %s
+
+typedef signed char BOOL;
+typedef struct _NSZone NSZone;
+@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
+typedef unsigned long NSUInteger;
+
+@protocol NSObject
+- (BOOL)isEqual:(id)object;
+@end
+@protocol NSCopying
+- (id)copyWithZone:(NSZone *)zone;
+@end
+@protocol NSCoding;
+@protocol NSMutableCopying;
+@protocol NSFastEnumeration
+- (void)encodeWithCoder:(NSCoder *)aCoder;
+@end
+@protocol NSMutableCopying  - (id)mutableCopyWithZone:(NSZone *)zone;
+@end
+@protocol NSCoding  - (void)encodeWithCoder:(NSCoder *)aCoder;
+@end
+@interface NSObject <NSObject> {}
++ (id)alloc;
+- (id)init;
+- (NSString *)description;
+@end
+@interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>
+- (NSUInteger)count;
+- (id)initWithObjects:(const id [])objects count:(NSUInteger)cnt;
++ (id)arrayWithObject:(id)anObject;
++ (id)arrayWithObjects:(const id [])objects count:(NSUInteger)cnt;
++ (id)arrayWithObjects:(id)firstObj, ... __attribute__((sentinel(0,1)));
+- (id)initWithObjects:(id)firstObj, ... __attribute__((sentinel(0,1)));
+- (id)initWithArray:(NSArray *)array;
+@end
+
+typedef const struct __CFAllocator * CFAllocatorRef;
+extern const CFAllocatorRef kCFAllocatorDefault;
+typedef double CFTimeInterval;
+typedef CFTimeInterval CFAbsoluteTime;
+extern CFAbsoluteTime CFAbsoluteTimeGetCurrent(void);
+typedef const struct __CFDate * CFDateRef;
+extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at);
+
+typedef const void* objc_objectptr_t;
+__attribute__((ns_returns_retained)) id objc_retainedObject(objc_objectptr_t __attribute__((cf_consumed)) pointer);
+__attribute__((ns_returns_not_retained)) id objc_unretainedObject(objc_objectptr_t pointer);
+
+// Test the analyzer is working at all.
+void test_working() {
+  int *p = 0;
+  *p = 0xDEADBEEF; // expected-warning {{null}}
+}
+
+// Test that in ARC mode that blocks are correctly automatically copied
+// and not flagged as warnings by the analyzer.
+typedef void (^Block)(void);
+void testblock_bar(int x);
+
+Block testblock_foo(int x) {
+  Block b = ^{ testblock_bar(x); };
+  return b; // no-warning
+}
+
+Block testblock_baz(int x) {
+  return ^{ testblock_bar(x); }; // no-warning
+}
+
+Block global_block;
+
+void testblock_qux(int x) {
+  global_block = ^{ testblock_bar(x); }; // no-warning
+}
+
+// Test that Objective-C pointers are null initialized.
+void test_nil_initialized() {
+  id x;
+  if (x == 0)
+    return;
+  int *p = 0;
+  *p = 0xDEADBEEF; // no-warning
+}
+
+// Test that we don't flag leaks of Objective-C objects.
+void test_alloc() {
+  [NSObject alloc]; // no-warning
+}
+
+// Test that CF allocations are still caught as leaks.
+void test_cf_leak() {
+  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
+  CFDateRef date = CFDateCreate(0, t); // expected-warning {{Potential leak}}
+  (void) date;
+}
+
+// Test that 'init' methods do not try to claim ownerhip of an *unowned* allocated object
+// in ARC mode.
+@interface RDar9424890_A :  NSObject
+- (id)initWithCleaner:(int)pop mop:(NSString *)mop ;
+- (RDar9424890_A *)rdar9424890:(NSString *)identifier;
+@end
+@interface RDar9424890_B : NSObject
+@end
+@implementation RDar9424890_B
+- (RDar9424890_A *)obj:(RDar9424890_A *)obj {
+  static NSString *WhizFiz = @"WhizFiz";
+  RDar9424890_A *cell = [obj rdar9424890:WhizFiz];
+  if (cell == ((void*)0)) {
+    cell = [[RDar9424890_A alloc] initWithCleaner:0 mop:WhizFiz]; // no-warning
+  }
+  return cell;
+}
+@end
+
+// Test that dead store checking works in the prescence of "cleanups" in the AST.
+void rdar9424882() {
+  id x = [NSObject alloc]; // expected-warning {{Value stored to 'x' during its initialization is never read}}
+}
+
+// Test 
+typedef const void *CFTypeRef;
+typedef const struct __CFString *CFStringRef;
+
+@interface NSString
+- (id) self;
+@end
+
+CFTypeRef CFCreateSomething();
+CFStringRef CFCreateString();
+CFTypeRef CFGetSomething();
+CFStringRef CFGetString();
+
+id CreateSomething();
+NSString *CreateNSString();
+
+void from_cf() {
+  id obj1 = (__bridge_transfer id)CFCreateSomething(); // expected-warning{{never read}}
+  id obj2 = (__bridge_transfer NSString*)CFCreateString();
+  [obj2 self]; // Add a use, to show we can use the object after it has been transfered.
+  id obj3 = (__bridge id)CFGetSomething();
+  [obj3 self]; // Add a use, to show we can use the object after it has been bridged.
+  id obj4 = (__bridge NSString*)CFGetString(); // expected-warning{{never read}}
+  id obj5 = (__bridge id)CFCreateSomething(); // expected-warning{{never read}} expected-warning{{leak}}
+  id obj6 = (__bridge NSString*)CFCreateString(); // expected-warning{{never read}} expected-warning{{leak}}
+}
+
+void to_cf(id obj) {
+  CFTypeRef cf1 = (__bridge_retained CFTypeRef)CreateSomething(); // expected-warning{{never read}}
+  CFStringRef cf2 = (__bridge_retained CFStringRef)CreateNSString(); // expected-warning{{never read}}
+  CFTypeRef cf3 = (__bridge CFTypeRef)CreateSomething(); // expected-warning{{never read}}
+  CFStringRef cf4 = (__bridge CFStringRef)CreateNSString();  // expected-warning{{never read}}
+}
+
+void test_objc_retainedObject() {
+  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
+  CFDateRef date = CFDateCreate(0, t);
+  id x = objc_retainedObject(date);
+  (void) x;
+}
+
+void test_objc_unretainedObject() {
+  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
+  CFDateRef date = CFDateCreate(0, t);  // expected-warning {{Potential leak}}
+  id x = objc_unretainedObject(date);
+  (void) x;
+}
+
+// Previously this resulted in a "return of stack address" warning.
+id test_return() {
+  id x = (__bridge_transfer id) CFCreateString();
+  return x; // no-warning
+}
+
+void test_objc_arrays() {
+    { // CASE ONE -- OBJECT IN ARRAY CREATED DIRECTLY
+        NSObject *o = [[NSObject alloc] init];
+        NSArray *a = [[NSArray alloc] initWithObjects:o, (void*)0];
+        [a description];
+        [o description];
+    }
+
+    { // CASE TWO -- OBJECT IN ARRAY CREATED BY DUPING AUTORELEASED ARRAY
+        NSObject *o = [[NSObject alloc] init];
+        NSArray *a1 = [NSArray arrayWithObjects:o, (void*)0];
+        NSArray *a2 = [[NSArray alloc] initWithArray:a1];
+        [a2 description];
+        [o description];
+    }
+
+    { // CASE THREE -- OBJECT IN RETAINED @[]
+        NSObject *o = [[NSObject alloc] init];
+        NSArray *a3 = @[o];
+        [a3 description];
+        [o description];
+    }
+    {
+      // CASE 4, verify analyzer still working.
+      CFCreateString(); // expected-warning {{leak}}
+    }
+}
+
+// <rdar://problem/11059275> - dispatch_set_context and ARC.
+__attribute__((cf_returns_retained)) CFTypeRef CFBridgingRetain(id X);
+typedef void* dispatch_object_t;
+void dispatch_set_context(dispatch_object_t object, const void *context);
+
+void rdar11059275(dispatch_object_t object) {
+  NSObject *o = [[NSObject alloc] init];
+  dispatch_set_context(object, CFBridgingRetain(o)); // no-warning  
+}
+void rdar11059275_positive() {
+  NSObject *o = [[NSObject alloc] init]; // expected-warning {{leak}}
+  CFBridgingRetain(o);
+}
+void rdar11059275_negative() {
+  NSObject *o = [[NSObject alloc] init]; // no-warning
+  (void) o;
+}
+