blob: 995470a369cb70e6c83093819f2b9618d9e21fbb [file] [log] [blame]
// RUN: %clang_cc1 -analyze -analyzer-checker=experimental.core.FixedAddr,experimental.core.PointerArithm,experimental.core.PointerSub -analyzer-store=region -verify -triple x86_64-apple-darwin9 %s
// RUN: %clang_cc1 -analyze -analyzer-checker=experimental.core.FixedAddr,experimental.core.PointerArithm,experimental.core.PointerSub -analyzer-store=region -verify -triple i686-apple-darwin9 %s
// Used to trigger warnings for unreachable paths.
#define WARN do { int a, b; int c = &b-&a; } while (0)
void f1() {
int a[10];
int *p = a;
++p;
}
char* foo();
void f2() {
char *p = foo();
++p;
}
// This test case checks if we get the right rvalue type of a TypedViewRegion.
// The ElementRegion's type depends on the array region's rvalue type. If it was
// a pointer type, we would get a loc::SymbolVal for '*p'.
void* memchr();
static int
domain_port (const char *domain_b, const char *domain_e,
const char **domain_e_ptr)
{
int port = 0;
const char *p;
const char *colon = memchr (domain_b, ':', domain_e - domain_b);
for (p = colon + 1; p < domain_e ; p++)
port = 10 * port + (*p - '0');
return port;
}
void f3() {
int x, y;
int d = &y - &x; // expected-warning{{Subtraction of two pointers that do not point to the same memory chunk may cause incorrect result.}}
int a[10];
int *p = &a[2];
int *q = &a[8];
d = q-p; // no-warning
}
void f4() {
int *p;
p = (int*) 0x10000; // expected-warning{{Using a fixed address is not portable because that address will probably not be valid in all environments or platforms.}}
}
void f5() {
int x, y;
int *p;
p = &x + 1; // expected-warning{{Pointer arithmetic done on non-array variables means reliance on memory layout, which is dangerous.}}
int a[10];
p = a + 1; // no-warning
}
// Allow arithmetic on different symbolic regions.
void f6(int *p, int *q) {
int d = q - p; // no-warning
}
void null_operand(int *a) {
start:
// LHS is a label, RHS is NULL
if (&&start == 0)
WARN; // no-warning
if (&&start < 0)
WARN; // no-warning
if (&&start <= 0)
WARN; // no-warning
if (!(&&start != 0))
WARN; // no-warning
if (!(&&start > 0))
WARN; // no-warning
if (!(&&start >= 0))
WARN; // no-warning
if (!(&&start - 0))
WARN; // no-warning
// LHS is a non-symbolic value, RHS is NULL
if (&a == 0)
WARN; // no-warning
if (&a < 0)
WARN; // no-warning
if (&a <= 0)
WARN; // no-warning
if (!(&a != 0))
WARN; // no-warning
if (!(&a > 0))
WARN; // no-warning
if (!(&a >= 0))
WARN; // no-warning
if (!(&a - 0)) // expected-warning{{Pointer arithmetic done on non-array variables}}
WARN; // no-warning
// LHS is NULL, RHS is non-symbolic
// The same code is used for labels and non-symbolic values.
if (0 == &a)
WARN; // no-warning
if (0 > &a)
WARN; // no-warning
if (0 >= &a)
WARN; // no-warning
if (!(0 != &a))
WARN; // no-warning
if (!(0 < &a))
WARN; // no-warning
if (!(0 <= &a))
WARN; // no-warning
// LHS is a symbolic value, RHS is NULL
if (a == 0)
WARN; // expected-warning{{}}
if (a < 0)
WARN; // no-warning
if (a <= 0)
WARN; // expected-warning{{}}
if (!(a != 0))
WARN; // expected-warning{{}}
if (!(a > 0))
WARN; // expected-warning{{}}
if (!(a >= 0))
WARN; // no-warning
if (!(a - 0))
WARN; // expected-warning{{}}
// LHS is NULL, RHS is a symbolic value
if (0 == a)
WARN; // expected-warning{{}}
if (0 > a)
WARN; // no-warning
if (0 >= a)
WARN; // expected-warning{{}}
if (!(0 != a))
WARN; // expected-warning{{}}
if (!(0 < a))
WARN; // expected-warning{{}}
if (!(0 <= a))
WARN; // no-warning
}
void const_locs() {
char *a = (char*)0x1000;
char *b = (char*)0x1100;
start:
if (a==b)
WARN; // no-warning
if (!(a!=b))
WARN; // no-warning
if (a>b)
WARN; // no-warning
if (b<a)
WARN; // no-warning
if (a>=b)
WARN; // no-warning
if (b<=a)
WARN; // no-warning
if (b-a != 0x100)
WARN; // no-warning
if (&&start == a)
WARN; // expected-warning{{}}
if (a == &&start)
WARN; // expected-warning{{}}
if (&a == (char**)a)
WARN; // expected-warning{{}}
if ((char**)a == &a)
WARN; // expected-warning{{}}
}
void array_matching_types() {
int array[10];
int *a = &array[2];
int *b = &array[5];
if (a==b)
WARN; // no-warning
if (!(a!=b))
WARN; // no-warning
if (a>b)
WARN; // no-warning
if (b<a)
WARN; // no-warning
if (a>=b)
WARN; // no-warning
if (b<=a)
WARN; // no-warning
if ((b-a) == 0)
WARN; // no-warning
}
// This takes a different code path than array_matching_types()
void array_different_types() {
int array[10];
int *a = &array[2];
char *b = (char*)&array[5];
if (a==b) // expected-warning{{comparison of distinct pointer types}}
WARN; // no-warning
if (!(a!=b)) // expected-warning{{comparison of distinct pointer types}}
WARN; // no-warning
if (a>b) // expected-warning{{comparison of distinct pointer types}}
WARN; // no-warning
if (b<a) // expected-warning{{comparison of distinct pointer types}}
WARN; // no-warning
if (a>=b) // expected-warning{{comparison of distinct pointer types}}
WARN; // no-warning
if (b<=a) // expected-warning{{comparison of distinct pointer types}}
WARN; // no-warning
}
struct test { int x; int y; };
void struct_fields() {
struct test a, b;
if (&a.x == &a.y)
WARN; // no-warning
if (!(&a.x != &a.y))
WARN; // no-warning
if (&a.x > &a.y)
WARN; // no-warning
if (&a.y < &a.x)
WARN; // no-warning
if (&a.x >= &a.y)
WARN; // no-warning
if (&a.y <= &a.x)
WARN; // no-warning
if (&a.x == &b.x)
WARN; // no-warning
if (!(&a.x != &b.x))
WARN; // no-warning
if (&a.x > &b.x)
WARN; // expected-warning{{}}
if (&b.x < &a.x)
WARN; // expected-warning{{}}
if (&a.x >= &b.x)
WARN; // expected-warning{{}}
if (&b.x <= &a.x)
WARN; // expected-warning{{}}
}
void mixed_region_types() {
struct test s;
int array[2];
void *a = &array, *b = &s;
if (&a == &b)
WARN; // no-warning
if (!(&a != &b))
WARN; // no-warning
if (&a > &b)
WARN; // expected-warning{{}}
if (&b < &a)
WARN; // expected-warning{{}}
if (&a >= &b)
WARN; // expected-warning{{}}
if (&b <= &a)
WARN; // expected-warning{{}}
}
void symbolic_region(int *p) {
int a;
if (&a == p)
WARN; // expected-warning{{}}
if (&a != p)
WARN; // expected-warning{{}}
if (&a > p)
WARN; // expected-warning{{}}
if (&a < p)
WARN; // expected-warning{{}}
if (&a >= p)
WARN; // expected-warning{{}}
if (&a <= p)
WARN; // expected-warning{{}}
}
void PR7527 (int *p) {
if (((int) p) & 1) // not crash
return;
}