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// RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.core -verify %s
extern void __assert_fail (__const char *__assertion, __const char *__file,
unsigned int __line, __const char *__function)
__attribute__ ((__noreturn__));
#define assert(expr) \
((expr) ? (void)(0) : __assert_fail (#expr, __FILE__, __LINE__, __func__))
typedef unsigned long long uintptr_t;
void f0(void) {
int *p = (int*) 0x10000; // Should not crash here.
*p = 3; // expected-warning{{Dereference of a fixed address}}
}
void f1(int *p) {
if (p != (int *)-1)
*p = 1;
else
*p = 0; // expected-warning{{Dereference of a fixed address}}
}
struct f2_struct {
int x;
};
int f2(struct f2_struct* p) {
if (p != (struct f2_struct *)1)
p->x = 1;
return p->x++; // expected-warning{{Access to field 'x' results in a dereference of a fixed address (loaded from variable 'p')}}
}
int f3_1(char* x) {
int i = 2;
if (x != (char *)1)
return x[i - 1];
return x[i+1]; // expected-warning{{Array access (from variable 'x') results in a dereference of a fixed address}}
}
int f3_2(char* x) {
int i = 2;
if (x != (char *)1)
return x[i - 1];
return x[i+1]++; // expected-warning{{Array access (from variable 'x') results in a dereference of a fixed address}}
}
int f4_1(int *p) {
uintptr_t x = (uintptr_t) p;
if (x != (uintptr_t)1)
return 1;
int *q = (int*) x;
return *q; // expected-warning{{Dereference of a fixed address (loaded from variable 'q')}}
}
int f4_2(void) {
short array[2];
uintptr_t x = (uintptr_t)array;
short *p = (short *)x;
// The following branch should be infeasible.
if (!(p == &array[0])) {
p = (short *)1;
*p = 1; // no-warning
}
if (p != (short *)1) {
*p = 5; // no-warning
p = (short *)1; // expected-warning {{Using a fixed address is not portable}}
}
else return 1;
*p += 10; // expected-warning{{Dereference of a fixed}}
return 0;
}
int f5(void) {
char *s = "hello world";
return s[0]; // no-warning
}
void f6(int *p, int *q) {
if (p != (int *)1)
if (p == (int *)1)
*p = 1; // no-warning
if (q == (int *)1)
if (q != (int *)1)
*q = 1; // no-warning
}
int* qux(int);
int f7_1(unsigned len) {
assert (len != 0);
int *p = (int *)1;
unsigned i;
for (i = 0; i < len; ++i)
p = qux(i);
return *p++; // no-warning
}
int f7_2(unsigned len) {
assert (len > 0); // note use of '>'
int *p = (int *)1;
unsigned i;
for (i = 0; i < len; ++i)
p = qux(i);
return *p++; // no-warning
}
struct f8_s {
int x;
int y[2];
};
void f8(struct f8_s *s, int coin) {
if (s != (struct f8_s *)7)
return;
if (coin)
s->x = 5; // expected-warning{{Access to field 'x' results in a dereference of a fixed address (loaded from variable 's')}}
else
s->y[1] = 6; // expected-warning{{Array access (via field 'y') results in a dereference of a fixed address}}
}
void f9() {
int (*p_function) (char, char) = (int (*)(char, char))0x04040; // FIXME: warn at this initialization
p_function = (int (*)(char, char))0x04080; // expected-warning {{Using a fixed address is not portable}}
// FIXME: there should be a warning from calling the function pointer with fixed address
int x = (*p_function) ('x', 'y');
}
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