Mirror of roytam1's UXP fork just in case Moonchild and Tobin decide to go after him
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#define MOZ_STACK_CLASS __attribute__((annotate("moz_stack_class")))
#include <stddef.h>
struct MOZ_STACK_CLASS Stack {
int i;
void *operator new(size_t x) throw() { return 0; }
void *operator new(size_t blah, char *buffer) { return buffer; }
};
template <class T>
struct MOZ_STACK_CLASS TemplateClass {
T i;
};
void gobble(void *) { }
void misuseStackClass(int len) {
Stack valid;
Stack alsoValid[2];
static Stack notValid; // expected-error {{variable of type 'Stack' only valid on the stack}} expected-note {{value incorrectly allocated in a global variable}}
static Stack alsoNotValid[2]; // expected-error {{variable of type 'Stack [2]' only valid on the stack}} expected-note {{'Stack [2]' is a stack type because it is an array of stack type 'Stack'}} expected-note {{value incorrectly allocated in a global variable}}
gobble(&valid);
gobble(&notValid);
gobble(&alsoValid[0]);
gobble(new Stack); // expected-error {{variable of type 'Stack' only valid on the stack}} expected-note {{value incorrectly allocated on the heap}}
gobble(new Stack[10]); // expected-error {{variable of type 'Stack' only valid on the stack}} expected-note {{value incorrectly allocated on the heap}}
gobble(new TemplateClass<int>); // expected-error {{variable of type 'TemplateClass<int>' only valid on the stack}} expected-note {{value incorrectly allocated on the heap}}
gobble(len <= 5 ? &valid : new Stack); // expected-error {{variable of type 'Stack' only valid on the stack}} expected-note {{value incorrectly allocated on the heap}}
char buffer[sizeof(Stack)];
gobble(new (buffer) Stack);
}
Stack notValid; // expected-error {{variable of type 'Stack' only valid on the stack}} expected-note {{value incorrectly allocated in a global variable}}
struct RandomClass {
Stack nonstaticMember; // expected-note {{'RandomClass' is a stack type because member 'nonstaticMember' is a stack type 'Stack'}}
static Stack staticMember; // expected-error {{variable of type 'Stack' only valid on the stack}} expected-note {{value incorrectly allocated in a global variable}}
};
struct MOZ_STACK_CLASS RandomStackClass {
Stack nonstaticMember;
static Stack staticMember; // expected-error {{variable of type 'Stack' only valid on the stack}} expected-note {{value incorrectly allocated in a global variable}}
};
struct BadInherit : Stack {}; // expected-note {{'BadInherit' is a stack type because it inherits from a stack type 'Stack'}}
struct MOZ_STACK_CLASS GoodInherit : Stack {};
BadInherit moreInvalid; // expected-error {{variable of type 'BadInherit' only valid on the stack}} expected-note {{value incorrectly allocated in a global variable}}
RandomClass evenMoreInvalid; // expected-error {{variable of type 'RandomClass' only valid on the stack}} expected-note {{value incorrectly allocated in a global variable}}