forked from OSchip/llvm-project
110 lines
4.4 KiB
Objective-C
110 lines
4.4 KiB
Objective-C
// RUN: %clang_cc1 -w -fblocks -analyze -analyzer-checker=core,osx.API,unix.Malloc -verify %s
|
|
// RUN: %clang_cc1 -w -fblocks -fobjc-arc -analyze -analyzer-checker=core,osx.API,unix.Malloc -verify %s
|
|
|
|
#include "Inputs/system-header-simulator-objc.h"
|
|
|
|
typedef unsigned long size_t;
|
|
void *calloc(size_t nmemb, size_t size);
|
|
|
|
typedef void (^dispatch_block_t)(void);
|
|
typedef long dispatch_once_t;
|
|
void dispatch_once(dispatch_once_t *predicate, dispatch_block_t block);
|
|
|
|
void test_stack() {
|
|
dispatch_once_t once;
|
|
dispatch_once(&once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the local variable 'once' for the predicate value. Using such transient memory for the predicate is potentially dangerous. Perhaps you intended to declare the variable as 'static'?}}
|
|
}
|
|
|
|
void test_static_local() {
|
|
static dispatch_once_t once;
|
|
dispatch_once(&once, ^{}); // no-warning
|
|
}
|
|
|
|
void test_heap_var() {
|
|
dispatch_once_t *once = calloc(1, sizeof(dispatch_once_t));
|
|
// Use regexps to check that we're NOT suggesting to make this static.
|
|
dispatch_once(once, ^{}); // expected-warning-re{{{{^Call to 'dispatch_once' uses heap-allocated memory for the predicate value. Using such transient memory for the predicate is potentially dangerous$}}}}
|
|
}
|
|
|
|
void test_external_pointer(dispatch_once_t *once) {
|
|
// External pointer does not necessarily point to the heap.
|
|
dispatch_once(once, ^{}); // no-warning
|
|
}
|
|
|
|
typedef struct {
|
|
dispatch_once_t once;
|
|
} Struct;
|
|
|
|
void test_local_struct() {
|
|
Struct s;
|
|
dispatch_once(&s.once, ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the local variable 's' for the predicate value.}}
|
|
}
|
|
|
|
void test_heap_struct() {
|
|
Struct *s = calloc(1, sizeof(Struct));
|
|
dispatch_once(&s->once, ^{}); // expected-warning{{Call to 'dispatch_once' uses heap-allocated memory for the predicate value.}}
|
|
}
|
|
|
|
@interface Object : NSObject {
|
|
@public
|
|
dispatch_once_t once;
|
|
Struct s;
|
|
dispatch_once_t once_array[2];
|
|
}
|
|
- (void)test_ivar_from_inside;
|
|
- (void)test_ivar_struct_from_inside;
|
|
@end
|
|
|
|
@implementation Object
|
|
- (void)test_ivar_from_inside {
|
|
dispatch_once(&once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the instance variable 'once' for the predicate value.}}
|
|
}
|
|
- (void)test_ivar_struct_from_inside {
|
|
dispatch_once(&s.once, ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 's' for the predicate value.}}
|
|
}
|
|
- (void)test_ivar_array_from_inside {
|
|
dispatch_once(&once_array[1], ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 'once_array' for the predicate value.}}
|
|
}
|
|
@end
|
|
|
|
void test_ivar_from_alloc_init() {
|
|
Object *o = [[Object alloc] init];
|
|
dispatch_once(&o->once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the instance variable 'once' for the predicate value.}}
|
|
}
|
|
void test_ivar_struct_from_alloc_init() {
|
|
Object *o = [[Object alloc] init];
|
|
dispatch_once(&o->s.once, ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 's' for the predicate value.}}
|
|
}
|
|
void test_ivar_array_from_alloc_init() {
|
|
Object *o = [[Object alloc] init];
|
|
dispatch_once(&o->once_array[1], ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 'once_array' for the predicate value.}}
|
|
}
|
|
|
|
void test_ivar_from_external_obj(Object *o) {
|
|
// ObjC object pointer always points to the heap.
|
|
dispatch_once(&o->once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the instance variable 'once' for the predicate value.}}
|
|
}
|
|
void test_ivar_struct_from_external_obj(Object *o) {
|
|
dispatch_once(&o->s.once, ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 's' for the predicate value.}}
|
|
}
|
|
void test_ivar_array_from_external_obj(Object *o) {
|
|
dispatch_once(&o->once_array[1], ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 'once_array' for the predicate value.}}
|
|
}
|
|
|
|
void test_block_var_from_block() {
|
|
__block dispatch_once_t once;
|
|
^{
|
|
dispatch_once(&once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the block variable 'once' for the predicate value.}}
|
|
};
|
|
}
|
|
|
|
void use_block_var(dispatch_once_t *once);
|
|
|
|
void test_block_var_from_outside_block() {
|
|
__block dispatch_once_t once;
|
|
^{
|
|
use_block_var(&once);
|
|
};
|
|
dispatch_once(&once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the block variable 'once' for the predicate value.}}
|
|
}
|