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