block-readweakgc.c [plain text]
#import <Foundation/Foundation.h>
void * _NSConcreteStackBlock;
int GlobalInt = 0;
int GlobalInt2 = 0;
id objc_assign_weak(id value, id *location) {
GlobalInt = 1;
*location = value;
return value;
}
id objc_read_weak(id *location) {
GlobalInt2 = 1;
return *location;
}
void (^__weak Henry)(void);
int main(char *argc, char *argv[]) {
void (^local)(void);
__block int i = 10;
Henry = ^ { ++i; };
local = Henry;
if (GlobalInt2 == 1) {
printf("%s: success\n", argv[0]);
exit(0);
}
else {
printf("%s: problem with weak write-barrier assignment of stack block\n", argv[0]);
}
exit(1);
}