forked from OSchip/llvm-project
117 lines
4.5 KiB
Objective-C
117 lines
4.5 KiB
Objective-C
// RUN: %clang_analyze_cc1 -w -fblocks -analyzer-checker=core,osx.API,unix.Malloc -verify %s
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// RUN: %clang_analyze_cc1 -w -fblocks -fobjc-arc -analyzer-checker=core,osx.API,unix.Malloc -verify %s
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#include "Inputs/system-header-simulator-objc.h"
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typedef unsigned long size_t;
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void *calloc(size_t nmemb, size_t size);
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typedef void (^dispatch_block_t)(void);
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typedef long dispatch_once_t;
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void dispatch_once(dispatch_once_t *predicate, dispatch_block_t block);
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void test_stack() {
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dispatch_once_t once;
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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'?}}
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}
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void test_static_local() {
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static dispatch_once_t once;
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dispatch_once(&once, ^{}); // no-warning
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}
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void test_heap_var() {
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dispatch_once_t *once = calloc(1, sizeof(dispatch_once_t));
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// Use regexps to check that we're NOT suggesting to make this static.
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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$}}}}
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}
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void test_external_pointer(dispatch_once_t *once) {
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// External pointer does not necessarily point to the heap.
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dispatch_once(once, ^{}); // no-warning
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}
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typedef struct {
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dispatch_once_t once;
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} Struct;
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void test_local_struct() {
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Struct s;
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dispatch_once(&s.once, ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the local variable 's' for the predicate value.}}
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}
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void test_heap_struct() {
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Struct *s = calloc(1, sizeof(Struct));
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dispatch_once(&s->once, ^{}); // expected-warning{{Call to 'dispatch_once' uses heap-allocated memory for the predicate value.}}
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}
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@interface Object : NSObject {
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@public
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dispatch_once_t once;
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Struct s;
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dispatch_once_t once_array[2];
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}
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- (void)test_ivar_from_inside;
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- (void)test_ivar_struct_from_inside;
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@end
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@implementation Object
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- (void)test_ivar_from_inside {
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dispatch_once(&once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the instance variable 'once' for the predicate value.}}
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}
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- (void)test_ivar_struct_from_inside {
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dispatch_once(&s.once, ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 's' for the predicate value.}}
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}
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- (void)test_ivar_array_from_inside {
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dispatch_once(&once_array[1], ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 'once_array' for the predicate value.}}
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}
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@end
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void test_ivar_from_alloc_init() {
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Object *o = [[Object alloc] init];
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dispatch_once(&o->once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the instance variable 'once' for the predicate value.}}
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}
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void test_ivar_struct_from_alloc_init() {
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Object *o = [[Object alloc] init];
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dispatch_once(&o->s.once, ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 's' for the predicate value.}}
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}
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void test_ivar_array_from_alloc_init() {
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Object *o = [[Object alloc] init];
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dispatch_once(&o->once_array[1], ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 'once_array' for the predicate value.}}
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}
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void test_ivar_from_external_obj(Object *o) {
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// ObjC object pointer always points to the heap.
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dispatch_once(&o->once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the instance variable 'once' for the predicate value.}}
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}
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void test_ivar_struct_from_external_obj(Object *o) {
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dispatch_once(&o->s.once, ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 's' for the predicate value.}}
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}
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void test_ivar_array_from_external_obj(Object *o) {
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dispatch_once(&o->once_array[1], ^{}); // expected-warning{{Call to 'dispatch_once' uses memory within the instance variable 'once_array' for the predicate value.}}
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}
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void test_block_var_from_block() {
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__block dispatch_once_t once;
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^{
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dispatch_once(&once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the block variable 'once' for the predicate value.}}
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};
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}
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void use_block_var(dispatch_once_t *once);
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void test_block_var_from_outside_block() {
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__block dispatch_once_t once;
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^{
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use_block_var(&once);
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};
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dispatch_once(&once, ^{}); // expected-warning{{Call to 'dispatch_once' uses the block variable 'once' for the predicate value.}}
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}
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void test_static_var_from_outside_block() {
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static dispatch_once_t once;
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^{
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dispatch_once(&once, ^{}); // no-warning
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};
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}
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