// RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin10 -analyzer-checker=core -fblocks -verify -Wno-strict-prototypes %s
// RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin10 -analyzer-checker=core -fblocks -verify -x objective-c++ %s
//===----------------------------------------------------------------------===//
// The following code is reduced using delta-debugging from Mac OS X headers:
//===----------------------------------------------------------------------===//
typedef __builtin_va_list va_list;
typedef unsigned int uint32_t;
typedef struct dispatch_queue_s *dispatch_queue_t;
typedef struct dispatch_queue_attr_s *dispatch_queue_attr_t;
typedef void (^dispatch_block_t)(void);
void dispatch_async(dispatch_queue_t queue, dispatch_block_t block);
__attribute__((visibility("default"))) __attribute__((__malloc__)) __attribute__((__warn_unused_result__)) __attribute__((__nothrow__)) dispatch_queue_t dispatch_queue_create(const char *label, dispatch_queue_attr_t attr);
typedef long dispatch_once_t;
void dispatch_once(dispatch_once_t *predicate, dispatch_block_t block);
#if __cplusplus >= 201703L
__attribute__((__nothrow__))
#endif
dispatch_queue_t
dispatch_queue_create(const char *label, dispatch_queue_attr_t attr);
typedef signed char BOOL;
typedef unsigned long NSUInteger;
typedef struct _NSZone NSZone;
@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
@protocol NSObject
- (BOOL)isEqual:(id)object;
- (oneway void)release;
@end
@protocol NSCopying - (id)copyWithZone:(NSZone *)zone; @end
@protocol NSMutableCopying - (id)mutableCopyWithZone:(NSZone *)zone; @end
@protocol NSCoding - (void)encodeWithCoder:(NSCoder *)aCoder; @end
@interface NSObject <NSObject> {}
+ (id)alloc;
- (id)init;
- (id)copy;
@end
extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone);
@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding>
- (NSUInteger)length;
- (const char *)UTF8String;
- (id)initWithFormat:(NSString *)format arguments:(va_list)argList __attribute__((format(__NSString__, 1, 0)));
@end
@class NSString, NSData;
typedef struct cssm_sample {} CSSM_SAMPLEGROUP, *CSSM_SAMPLEGROUP_PTR;
typedef struct __aslclient *aslclient;
typedef struct __aslmsg *aslmsg;
aslclient asl_open(const char *ident, const char *facility, uint32_t opts);
int asl_log(aslclient asl, aslmsg msg, int level, const char *format, ...) __attribute__((__format__ (__printf__, 4, 5)));
struct Block_layout {
int flags;
};
//===----------------------------------------------------------------------===//
// Begin actual test cases.
//===----------------------------------------------------------------------===//
// test1 - This test case exposed logic that caused the analyzer to crash because of a memory bug
// in BlockDataRegion. It represents real code that contains two block literals. Eventually
// via IPA 'logQueue' and 'client' should be updated after the call to 'dispatch_once'.
void test1(NSString *format, ...) {
static dispatch_queue_t logQueue;
static aslclient client;
static dispatch_once_t pred;
do {
if (__builtin_expect(*(&pred), ~0l) != ~0l)
dispatch_once(&pred, ^{
logQueue = dispatch_queue_create("com.mycompany.myproduct.asl", 0);
client = asl_open(((char*)0), "com.mycompany.myproduct", 0);
});
} while (0);
va_list args;
__builtin_va_start(args, format);
NSString *str = [[NSString alloc] initWithFormat:format arguments:args];
dispatch_async(logQueue, ^{ asl_log(client, ((aslmsg)0), 4, "%s", [str UTF8String]); });
[str release];
__builtin_va_end(args);
}
// test2 - Test that captured variables that are uninitialized are flagged
// as such.
void test2(void) {
static int y = 0;
int x;
^{ y = x + 1; }(); // expected-warning{{Variable 'x' is uninitialized when captured by block}}
}
void test2_b(void) {
static int y = 0;
__block int x;
^{ y = x + 1; }(); // expected-warning {{left operand of '+' is a garbage value}}
}
void test2_c(void) {
typedef void (^myblock)(void);
myblock f = ^(void) { f(); }; // expected-warning{{Variable 'f' is uninitialized when captured by block}}
}
void testMessaging(void) {
[[^(void){} copy] release];
}
@interface rdar12415065 : NSObject
@end
@implementation rdar12415065
- (void)test {
// At one point this crashed because we created a path note at a
// PreStmtPurgeDeadSymbols point but only knew how to deal with PostStmt
// points.
extern dispatch_queue_t queue;
if (!queue)
return;
// This previously was a false positive with 'x' being flagged as being
// uninitialized when captured by the exterior block (when it is only
// captured by the interior block).
dispatch_async(queue, ^{
double x = 0.0;
if (24.0f < x) {
dispatch_async(queue, ^{ (void)x; });
[self test];
}
});
}
@end
void testReturnVariousSignatures(void) {
(void)^int(void){
return 42;
}();
(void)^int{
return 42;
}();
(void)^(void){
return 42;
}();
(void)^{
return 42;
}();
}
// This test used to cause infinite loop in the region invalidation.
void blockCapturesItselfInTheLoop(int x, int m) {
void (^assignData)(int) = ^(int x){
x++;
};
while (m < 0) {
void (^loop)(int);
loop = ^(int x) {
assignData(x);
};
assignData = loop;
m++;
}
assignData(x);
}
// Blocks that called the function they were contained in that also have
// static locals caused crashes.
void takeNonnullBlock(void (^)(void)) __attribute__((nonnull));
void takeNonnullIntBlock(int (^)(void)) __attribute__((nonnull));
void testCallContainingWithSignature1(void)
{
takeNonnullBlock(^{
static const char str[] = "Lost connection to sharingd";
testCallContainingWithSignature1();
});
}
void testCallContainingWithSignature2(void)
{
takeNonnullBlock(^void{
static const char str[] = "Lost connection to sharingd";
testCallContainingWithSignature2();
});
}
void testCallContainingWithSignature3(void)
{
takeNonnullBlock(^void(void){
static const char str[] = "Lost connection to sharingd";
testCallContainingWithSignature3();
});
}
void testCallContainingWithSignature4(void)
{
takeNonnullBlock(^void(void){
static const char str[] = "Lost connection to sharingd";
testCallContainingWithSignature4();
});
}
void testCallContainingWithSignature5(void)
{
takeNonnullIntBlock(^{
static const char str[] = "Lost connection to sharingd";
testCallContainingWithSignature5();
return 0;
});
}
__attribute__((objc_root_class))
@interface SuperClass
- (void)someMethod;
@end
@interface SomeClass : SuperClass
@end
// Make sure to properly handle super-calls when a block captures
// a local variable named 'self'.
@implementation SomeClass
-(void)foo; {
/*__weak*/ SomeClass *weakSelf = self;
(void)(^(void) {
SomeClass *self = weakSelf;
(void)(^(void) {
(void)self;
[super someMethod]; // no-warning
});
});
}
@end
// The incorrect block variable initialization below is a hard compile-time
// error in C++.
#if !defined(__cplusplus)
void call_block_with_fewer_arguments(void) {
void (^b)() = ^(int a) { };
b(); // expected-warning {{Block taking 1 argument is called with fewer (0)}}
}
#endif
int getBlockFlags(void) {
int x = 0;
return ((struct Block_layout *)^{ (void)x; })->flags; // no-warning
}
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