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overflow: Introduce overflows_type() and castable_to_type()
Implement a robust overflows_type() macro to test if a variable or constant value would overflow another variable or type. This can be used as a constant expression for static_assert() (which requires a constant expression[1][2]) when used on constant values. This must be constructed manually, since __builtin_add_overflow() does not produce a constant expression[3]. Additionally adds castable_to_type(), similar to __same_type(), but for checking if a constant value would overflow if cast to a given type. Add unit tests for overflows_type(), __same_type(), and castable_to_type() to the existing KUnit "overflow" test: [16:03:33] ================== overflow (21 subtests) ================== ... [16:03:33] [PASSED] overflows_type_test [16:03:33] [PASSED] same_type_test [16:03:33] [PASSED] castable_to_type_test [16:03:33] ==================== [PASSED] overflow ===================== [16:03:33] ============================================================ [16:03:33] Testing complete. Ran 21 tests: passed: 21 [16:03:33] Elapsed time: 24.022s total, 0.002s configuring, 22.598s building, 0.767s running [1] https://en.cppreference.com/w/c/language/_Static_assert [2] C11 standard (ISO/IEC 9899:2011): 6.7.10 Static assertions [3] https://gcc.gnu.org/onlinedocs/gcc/Integer-Overflow-Builtins.html 6.56 Built-in Functions to Perform Arithmetic with Overflow Checking Built-in Function: bool __builtin_add_overflow (type1 a, type2 b, Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Tom Rix <trix@redhat.com> Cc: Daniel Latypov <dlatypov@google.com> Cc: Vitor Massaru Iha <vitor@massaru.org> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: linux-hardening@vger.kernel.org Cc: llvm@lists.linux.dev Co-developed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20221024201125.1416422-1-gwan-gyeong.mun@intel.com
This commit is contained in:
Kees Cook
parent
6dd142d901
commit
4b21d25bf5
@ -51,7 +51,7 @@ int i915_user_extensions(struct i915_user_extension __user *ext,
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return err;
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if (get_user(next, &ext->next_extension) ||
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overflows_type(next, ext))
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overflows_type(next, uintptr_t))
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return -EFAULT;
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ext = u64_to_user_ptr(next);
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@ -111,10 +111,6 @@ bool i915_error_injected(void);
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#define range_overflows_end_t(type, start, size, max) \
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range_overflows_end((type)(start), (type)(size), (type)(max))
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/* Note we don't consider signbits :| */
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#define overflows_type(x, T) \
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(sizeof(x) > sizeof(T) && (x) >> BITS_PER_TYPE(T))
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#define ptr_mask_bits(ptr, n) ({ \
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unsigned long __v = (unsigned long)(ptr); \
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(typeof(ptr))(__v & -BIT(n)); \
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@ -236,6 +236,7 @@ static inline void *offset_to_ptr(const int *off)
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* bool and also pointer types.
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*/
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#define is_signed_type(type) (((type)(-1)) < (__force type)1)
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#define is_unsigned_type(type) (!is_signed_type(type))
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/*
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* This is needed in functions which generate the stack canary, see
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@ -128,6 +128,53 @@ static inline bool __must_check __must_check_overflow(bool overflow)
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(*_d >> _to_shift) != _a); \
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}))
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#define __overflows_type_constexpr(x, T) ( \
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is_unsigned_type(typeof(x)) ? \
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(x) > type_max(typeof(T)) : \
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is_unsigned_type(typeof(T)) ? \
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(x) < 0 || (x) > type_max(typeof(T)) : \
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(x) < type_min(typeof(T)) || (x) > type_max(typeof(T)))
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#define __overflows_type(x, T) ({ \
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typeof(T) v = 0; \
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check_add_overflow((x), v, &v); \
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})
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/**
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* overflows_type - helper for checking the overflows between value, variables,
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* or data type
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*
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* @n: source constant value or variable to be checked
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* @T: destination variable or data type proposed to store @x
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*
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* Compares the @x expression for whether or not it can safely fit in
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* the storage of the type in @T. @x and @T can have different types.
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* If @x is a constant expression, this will also resolve to a constant
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* expression.
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*
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* Returns: true if overflow can occur, false otherwise.
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*/
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#define overflows_type(n, T) \
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__builtin_choose_expr(__is_constexpr(n), \
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__overflows_type_constexpr(n, T), \
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__overflows_type(n, T))
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/**
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* castable_to_type - like __same_type(), but also allows for casted literals
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*
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* @n: variable or constant value
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* @T: variable or data type
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*
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* Unlike the __same_type() macro, this allows a constant value as the
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* first argument. If this value would not overflow into an assignment
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* of the second argument's type, it returns true. Otherwise, this falls
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* back to __same_type().
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*/
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#define castable_to_type(n, T) \
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__builtin_choose_expr(__is_constexpr(n), \
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!__overflows_type_constexpr(n, T), \
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__same_type(n, T))
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/**
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* size_mul() - Calculate size_t multiplication with saturation at SIZE_MAX
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* @factor1: first factor
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@ -374,6 +374,7 @@ obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o
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obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o
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obj-$(CONFIG_MEMCPY_KUNIT_TEST) += memcpy_kunit.o
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obj-$(CONFIG_IS_SIGNED_TYPE_KUNIT_TEST) += is_signed_type_kunit.o
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CFLAGS_overflow_kunit.o = $(call cc-disable-warning, tautological-constant-out-of-range-compare)
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obj-$(CONFIG_OVERFLOW_KUNIT_TEST) += overflow_kunit.o
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CFLAGS_stackinit_kunit.o += $(call cc-disable-warning, switch-unreachable)
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obj-$(CONFIG_STACKINIT_KUNIT_TEST) += stackinit_kunit.o
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@ -736,6 +736,384 @@ static void overflow_size_helpers_test(struct kunit *test)
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#undef check_one_size_helper
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}
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static void overflows_type_test(struct kunit *test)
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{
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int count = 0;
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unsigned int var;
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#define __TEST_OVERFLOWS_TYPE(func, arg1, arg2, of) do { \
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bool __of = func(arg1, arg2); \
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KUNIT_EXPECT_EQ_MSG(test, __of, of, \
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"expected " #func "(" #arg1 ", " #arg2 " to%s overflow\n",\
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of ? "" : " not"); \
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count++; \
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} while (0)
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/* Args are: first type, second type, value, overflow expected */
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#define TEST_OVERFLOWS_TYPE(__t1, __t2, v, of) do { \
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__t1 t1 = (v); \
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__t2 t2; \
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__TEST_OVERFLOWS_TYPE(__overflows_type, t1, t2, of); \
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__TEST_OVERFLOWS_TYPE(__overflows_type, t1, __t2, of); \
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__TEST_OVERFLOWS_TYPE(__overflows_type_constexpr, t1, t2, of); \
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__TEST_OVERFLOWS_TYPE(__overflows_type_constexpr, t1, __t2, of);\
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} while (0)
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TEST_OVERFLOWS_TYPE(u8, u8, U8_MAX, false);
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TEST_OVERFLOWS_TYPE(u8, u16, U8_MAX, false);
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TEST_OVERFLOWS_TYPE(u8, s8, U8_MAX, true);
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TEST_OVERFLOWS_TYPE(u8, s8, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(u8, s8, (u8)S8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u8, s16, U8_MAX, false);
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TEST_OVERFLOWS_TYPE(s8, u8, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(s8, u8, -1, true);
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TEST_OVERFLOWS_TYPE(s8, u8, S8_MIN, true);
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TEST_OVERFLOWS_TYPE(s8, u16, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(s8, u16, -1, true);
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TEST_OVERFLOWS_TYPE(s8, u16, S8_MIN, true);
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TEST_OVERFLOWS_TYPE(s8, u32, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(s8, u32, -1, true);
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TEST_OVERFLOWS_TYPE(s8, u32, S8_MIN, true);
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#if BITS_PER_LONG == 64
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TEST_OVERFLOWS_TYPE(s8, u64, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(s8, u64, -1, true);
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TEST_OVERFLOWS_TYPE(s8, u64, S8_MIN, true);
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#endif
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TEST_OVERFLOWS_TYPE(s8, s8, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(s8, s8, S8_MIN, false);
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TEST_OVERFLOWS_TYPE(s8, s16, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(s8, s16, S8_MIN, false);
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TEST_OVERFLOWS_TYPE(u16, u8, U8_MAX, false);
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TEST_OVERFLOWS_TYPE(u16, u8, (u16)U8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u16, u8, U16_MAX, true);
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TEST_OVERFLOWS_TYPE(u16, s8, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(u16, s8, (u16)S8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u16, s8, U16_MAX, true);
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TEST_OVERFLOWS_TYPE(u16, s16, S16_MAX, false);
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TEST_OVERFLOWS_TYPE(u16, s16, (u16)S16_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u16, s16, U16_MAX, true);
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TEST_OVERFLOWS_TYPE(u16, u32, U16_MAX, false);
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TEST_OVERFLOWS_TYPE(u16, s32, U16_MAX, false);
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TEST_OVERFLOWS_TYPE(s16, u8, U8_MAX, false);
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TEST_OVERFLOWS_TYPE(s16, u8, (s16)U8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s16, u8, -1, true);
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TEST_OVERFLOWS_TYPE(s16, u8, S16_MIN, true);
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TEST_OVERFLOWS_TYPE(s16, u16, S16_MAX, false);
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TEST_OVERFLOWS_TYPE(s16, u16, -1, true);
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TEST_OVERFLOWS_TYPE(s16, u16, S16_MIN, true);
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TEST_OVERFLOWS_TYPE(s16, u32, S16_MAX, false);
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TEST_OVERFLOWS_TYPE(s16, u32, -1, true);
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TEST_OVERFLOWS_TYPE(s16, u32, S16_MIN, true);
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#if BITS_PER_LONG == 64
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TEST_OVERFLOWS_TYPE(s16, u64, S16_MAX, false);
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TEST_OVERFLOWS_TYPE(s16, u64, -1, true);
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TEST_OVERFLOWS_TYPE(s16, u64, S16_MIN, true);
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#endif
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TEST_OVERFLOWS_TYPE(s16, s8, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(s16, s8, S8_MIN, false);
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TEST_OVERFLOWS_TYPE(s16, s8, (s16)S8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s16, s8, (s16)S8_MIN - 1, true);
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TEST_OVERFLOWS_TYPE(s16, s8, S16_MAX, true);
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TEST_OVERFLOWS_TYPE(s16, s8, S16_MIN, true);
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TEST_OVERFLOWS_TYPE(s16, s16, S16_MAX, false);
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TEST_OVERFLOWS_TYPE(s16, s16, S16_MIN, false);
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TEST_OVERFLOWS_TYPE(s16, s32, S16_MAX, false);
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TEST_OVERFLOWS_TYPE(s16, s32, S16_MIN, false);
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TEST_OVERFLOWS_TYPE(u32, u8, U8_MAX, false);
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TEST_OVERFLOWS_TYPE(u32, u8, (u32)U8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u32, u8, U32_MAX, true);
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TEST_OVERFLOWS_TYPE(u32, s8, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(u32, s8, (u32)S8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u32, s8, U32_MAX, true);
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TEST_OVERFLOWS_TYPE(u32, u16, U16_MAX, false);
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TEST_OVERFLOWS_TYPE(u32, u16, U16_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u32, u16, U32_MAX, true);
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TEST_OVERFLOWS_TYPE(u32, s16, S16_MAX, false);
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TEST_OVERFLOWS_TYPE(u32, s16, (u32)S16_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u32, s16, U32_MAX, true);
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TEST_OVERFLOWS_TYPE(u32, u32, U32_MAX, false);
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TEST_OVERFLOWS_TYPE(u32, s32, S32_MAX, false);
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TEST_OVERFLOWS_TYPE(u32, s32, U32_MAX, true);
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TEST_OVERFLOWS_TYPE(u32, s32, (u32)S32_MAX + 1, true);
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#if BITS_PER_LONG == 64
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TEST_OVERFLOWS_TYPE(u32, u64, U32_MAX, false);
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TEST_OVERFLOWS_TYPE(u32, s64, U32_MAX, false);
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#endif
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TEST_OVERFLOWS_TYPE(s32, u8, U8_MAX, false);
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TEST_OVERFLOWS_TYPE(s32, u8, (s32)U8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s32, u16, S32_MAX, true);
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TEST_OVERFLOWS_TYPE(s32, u8, -1, true);
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TEST_OVERFLOWS_TYPE(s32, u8, S32_MIN, true);
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TEST_OVERFLOWS_TYPE(s32, u16, U16_MAX, false);
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TEST_OVERFLOWS_TYPE(s32, u16, (s32)U16_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s32, u16, S32_MAX, true);
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TEST_OVERFLOWS_TYPE(s32, u16, -1, true);
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TEST_OVERFLOWS_TYPE(s32, u16, S32_MIN, true);
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TEST_OVERFLOWS_TYPE(s32, u32, S32_MAX, false);
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TEST_OVERFLOWS_TYPE(s32, u32, -1, true);
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TEST_OVERFLOWS_TYPE(s32, u32, S32_MIN, true);
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#if BITS_PER_LONG == 64
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TEST_OVERFLOWS_TYPE(s32, u64, S32_MAX, false);
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TEST_OVERFLOWS_TYPE(s32, u64, -1, true);
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TEST_OVERFLOWS_TYPE(s32, u64, S32_MIN, true);
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#endif
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TEST_OVERFLOWS_TYPE(s32, s8, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(s32, s8, S8_MIN, false);
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TEST_OVERFLOWS_TYPE(s32, s8, (s32)S8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s32, s8, (s32)S8_MIN - 1, true);
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TEST_OVERFLOWS_TYPE(s32, s8, S32_MAX, true);
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TEST_OVERFLOWS_TYPE(s32, s8, S32_MIN, true);
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TEST_OVERFLOWS_TYPE(s32, s16, S16_MAX, false);
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TEST_OVERFLOWS_TYPE(s32, s16, S16_MIN, false);
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TEST_OVERFLOWS_TYPE(s32, s16, (s32)S16_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s32, s16, (s32)S16_MIN - 1, true);
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TEST_OVERFLOWS_TYPE(s32, s16, S32_MAX, true);
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TEST_OVERFLOWS_TYPE(s32, s16, S32_MIN, true);
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TEST_OVERFLOWS_TYPE(s32, s32, S32_MAX, false);
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TEST_OVERFLOWS_TYPE(s32, s32, S32_MIN, false);
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#if BITS_PER_LONG == 64
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TEST_OVERFLOWS_TYPE(s32, s64, S32_MAX, false);
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TEST_OVERFLOWS_TYPE(s32, s64, S32_MIN, false);
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TEST_OVERFLOWS_TYPE(u64, u8, U64_MAX, true);
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TEST_OVERFLOWS_TYPE(u64, u8, U8_MAX, false);
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TEST_OVERFLOWS_TYPE(u64, u8, (u64)U8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u64, u16, U64_MAX, true);
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TEST_OVERFLOWS_TYPE(u64, u16, U16_MAX, false);
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TEST_OVERFLOWS_TYPE(u64, u16, (u64)U16_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u64, u32, U64_MAX, true);
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TEST_OVERFLOWS_TYPE(u64, u32, U32_MAX, false);
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TEST_OVERFLOWS_TYPE(u64, u32, (u64)U32_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u64, u64, U64_MAX, false);
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TEST_OVERFLOWS_TYPE(u64, s8, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(u64, s8, (u64)S8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u64, s8, U64_MAX, true);
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TEST_OVERFLOWS_TYPE(u64, s16, S16_MAX, false);
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TEST_OVERFLOWS_TYPE(u64, s16, (u64)S16_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u64, s16, U64_MAX, true);
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TEST_OVERFLOWS_TYPE(u64, s32, S32_MAX, false);
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TEST_OVERFLOWS_TYPE(u64, s32, (u64)S32_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(u64, s32, U64_MAX, true);
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TEST_OVERFLOWS_TYPE(u64, s64, S64_MAX, false);
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TEST_OVERFLOWS_TYPE(u64, s64, U64_MAX, true);
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TEST_OVERFLOWS_TYPE(u64, s64, (u64)S64_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s64, u8, S64_MAX, true);
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TEST_OVERFLOWS_TYPE(s64, u8, S64_MIN, true);
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TEST_OVERFLOWS_TYPE(s64, u8, -1, true);
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TEST_OVERFLOWS_TYPE(s64, u8, U8_MAX, false);
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TEST_OVERFLOWS_TYPE(s64, u8, (s64)U8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s64, u16, S64_MAX, true);
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TEST_OVERFLOWS_TYPE(s64, u16, S64_MIN, true);
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TEST_OVERFLOWS_TYPE(s64, u16, -1, true);
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TEST_OVERFLOWS_TYPE(s64, u16, U16_MAX, false);
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TEST_OVERFLOWS_TYPE(s64, u16, (s64)U16_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s64, u32, S64_MAX, true);
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TEST_OVERFLOWS_TYPE(s64, u32, S64_MIN, true);
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TEST_OVERFLOWS_TYPE(s64, u32, -1, true);
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TEST_OVERFLOWS_TYPE(s64, u32, U32_MAX, false);
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TEST_OVERFLOWS_TYPE(s64, u32, (s64)U32_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s64, u64, S64_MAX, false);
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TEST_OVERFLOWS_TYPE(s64, u64, S64_MIN, true);
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TEST_OVERFLOWS_TYPE(s64, u64, -1, true);
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TEST_OVERFLOWS_TYPE(s64, s8, S8_MAX, false);
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TEST_OVERFLOWS_TYPE(s64, s8, S8_MIN, false);
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TEST_OVERFLOWS_TYPE(s64, s8, (s64)S8_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s64, s8, (s64)S8_MIN - 1, true);
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TEST_OVERFLOWS_TYPE(s64, s8, S64_MAX, true);
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TEST_OVERFLOWS_TYPE(s64, s16, S16_MAX, false);
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TEST_OVERFLOWS_TYPE(s64, s16, S16_MIN, false);
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TEST_OVERFLOWS_TYPE(s64, s16, (s64)S16_MAX + 1, true);
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TEST_OVERFLOWS_TYPE(s64, s16, (s64)S16_MIN - 1, true);
|
||||
TEST_OVERFLOWS_TYPE(s64, s16, S64_MAX, true);
|
||||
TEST_OVERFLOWS_TYPE(s64, s32, S32_MAX, false);
|
||||
TEST_OVERFLOWS_TYPE(s64, s32, S32_MIN, false);
|
||||
TEST_OVERFLOWS_TYPE(s64, s32, (s64)S32_MAX + 1, true);
|
||||
TEST_OVERFLOWS_TYPE(s64, s32, (s64)S32_MIN - 1, true);
|
||||
TEST_OVERFLOWS_TYPE(s64, s32, S64_MAX, true);
|
||||
TEST_OVERFLOWS_TYPE(s64, s64, S64_MAX, false);
|
||||
TEST_OVERFLOWS_TYPE(s64, s64, S64_MIN, false);
|
||||
#endif
|
||||
|
||||
/* Check for macro side-effects. */
|
||||
var = INT_MAX - 1;
|
||||
__TEST_OVERFLOWS_TYPE(__overflows_type, var++, int, false);
|
||||
__TEST_OVERFLOWS_TYPE(__overflows_type, var++, int, false);
|
||||
__TEST_OVERFLOWS_TYPE(__overflows_type, var++, int, true);
|
||||
var = INT_MAX - 1;
|
||||
__TEST_OVERFLOWS_TYPE(overflows_type, var++, int, false);
|
||||
__TEST_OVERFLOWS_TYPE(overflows_type, var++, int, false);
|
||||
__TEST_OVERFLOWS_TYPE(overflows_type, var++, int, true);
|
||||
|
||||
kunit_info(test, "%d overflows_type() tests finished\n", count);
|
||||
#undef TEST_OVERFLOWS_TYPE
|
||||
#undef __TEST_OVERFLOWS_TYPE
|
||||
}
|
||||
|
||||
static void same_type_test(struct kunit *test)
|
||||
{
|
||||
int count = 0;
|
||||
int var;
|
||||
|
||||
#define TEST_SAME_TYPE(t1, t2, same) do { \
|
||||
typeof(t1) __t1h = type_max(t1); \
|
||||
typeof(t1) __t1l = type_min(t1); \
|
||||
typeof(t2) __t2h = type_max(t2); \
|
||||
typeof(t2) __t2l = type_min(t2); \
|
||||
KUNIT_EXPECT_EQ(test, true, __same_type(t1, __t1h)); \
|
||||
KUNIT_EXPECT_EQ(test, true, __same_type(t1, __t1l)); \
|
||||
KUNIT_EXPECT_EQ(test, true, __same_type(__t1h, t1)); \
|
||||
KUNIT_EXPECT_EQ(test, true, __same_type(__t1l, t1)); \
|
||||
KUNIT_EXPECT_EQ(test, true, __same_type(t2, __t2h)); \
|
||||
KUNIT_EXPECT_EQ(test, true, __same_type(t2, __t2l)); \
|
||||
KUNIT_EXPECT_EQ(test, true, __same_type(__t2h, t2)); \
|
||||
KUNIT_EXPECT_EQ(test, true, __same_type(__t2l, t2)); \
|
||||
KUNIT_EXPECT_EQ(test, same, __same_type(t1, t2)); \
|
||||
KUNIT_EXPECT_EQ(test, same, __same_type(t2, __t1h)); \
|
||||
KUNIT_EXPECT_EQ(test, same, __same_type(t2, __t1l)); \
|
||||
KUNIT_EXPECT_EQ(test, same, __same_type(__t1h, t2)); \
|
||||
KUNIT_EXPECT_EQ(test, same, __same_type(__t1l, t2)); \
|
||||
KUNIT_EXPECT_EQ(test, same, __same_type(t1, __t2h)); \
|
||||
KUNIT_EXPECT_EQ(test, same, __same_type(t1, __t2l)); \
|
||||
KUNIT_EXPECT_EQ(test, same, __same_type(__t2h, t1)); \
|
||||
KUNIT_EXPECT_EQ(test, same, __same_type(__t2l, t1)); \
|
||||
} while (0)
|
||||
|
||||
#if BITS_PER_LONG == 64
|
||||
# define TEST_SAME_TYPE64(base, t, m) TEST_SAME_TYPE(base, t, m)
|
||||
#else
|
||||
# define TEST_SAME_TYPE64(base, t, m) do { } while (0)
|
||||
#endif
|
||||
|
||||
#define TEST_TYPE_SETS(base, mu8, mu16, mu32, ms8, ms16, ms32, mu64, ms64) \
|
||||
do { \
|
||||
TEST_SAME_TYPE(base, u8, mu8); \
|
||||
TEST_SAME_TYPE(base, u16, mu16); \
|
||||
TEST_SAME_TYPE(base, u32, mu32); \
|
||||
TEST_SAME_TYPE(base, s8, ms8); \
|
||||
TEST_SAME_TYPE(base, s16, ms16); \
|
||||
TEST_SAME_TYPE(base, s32, ms32); \
|
||||
TEST_SAME_TYPE64(base, u64, mu64); \
|
||||
TEST_SAME_TYPE64(base, s64, ms64); \
|
||||
} while (0)
|
||||
|
||||
TEST_TYPE_SETS(u8, true, false, false, false, false, false, false, false);
|
||||
TEST_TYPE_SETS(u16, false, true, false, false, false, false, false, false);
|
||||
TEST_TYPE_SETS(u32, false, false, true, false, false, false, false, false);
|
||||
TEST_TYPE_SETS(s8, false, false, false, true, false, false, false, false);
|
||||
TEST_TYPE_SETS(s16, false, false, false, false, true, false, false, false);
|
||||
TEST_TYPE_SETS(s32, false, false, false, false, false, true, false, false);
|
||||
#if BITS_PER_LONG == 64
|
||||
TEST_TYPE_SETS(u64, false, false, false, false, false, false, true, false);
|
||||
TEST_TYPE_SETS(s64, false, false, false, false, false, false, false, true);
|
||||
#endif
|
||||
|
||||
/* Check for macro side-effects. */
|
||||
var = 4;
|
||||
KUNIT_EXPECT_EQ(test, var, 4);
|
||||
KUNIT_EXPECT_TRUE(test, __same_type(var++, int));
|
||||
KUNIT_EXPECT_EQ(test, var, 4);
|
||||
KUNIT_EXPECT_TRUE(test, __same_type(int, var++));
|
||||
KUNIT_EXPECT_EQ(test, var, 4);
|
||||
KUNIT_EXPECT_TRUE(test, __same_type(var++, var++));
|
||||
KUNIT_EXPECT_EQ(test, var, 4);
|
||||
|
||||
kunit_info(test, "%d __same_type() tests finished\n", count);
|
||||
|
||||
#undef TEST_TYPE_SETS
|
||||
#undef TEST_SAME_TYPE64
|
||||
#undef TEST_SAME_TYPE
|
||||
}
|
||||
|
||||
static void castable_to_type_test(struct kunit *test)
|
||||
{
|
||||
int count = 0;
|
||||
|
||||
#define TEST_CASTABLE_TO_TYPE(arg1, arg2, pass) do { \
|
||||
bool __pass = castable_to_type(arg1, arg2); \
|
||||
KUNIT_EXPECT_EQ_MSG(test, __pass, pass, \
|
||||
"expected castable_to_type(" #arg1 ", " #arg2 ") to%s pass\n",\
|
||||
pass ? "" : " not"); \
|
||||
count++; \
|
||||
} while (0)
|
||||
|
||||
TEST_CASTABLE_TO_TYPE(16, u8, true);
|
||||
TEST_CASTABLE_TO_TYPE(16, u16, true);
|
||||
TEST_CASTABLE_TO_TYPE(16, u32, true);
|
||||
TEST_CASTABLE_TO_TYPE(16, s8, true);
|
||||
TEST_CASTABLE_TO_TYPE(16, s16, true);
|
||||
TEST_CASTABLE_TO_TYPE(16, s32, true);
|
||||
TEST_CASTABLE_TO_TYPE(-16, s8, true);
|
||||
TEST_CASTABLE_TO_TYPE(-16, s16, true);
|
||||
TEST_CASTABLE_TO_TYPE(-16, s32, true);
|
||||
#if BITS_PER_LONG == 64
|
||||
TEST_CASTABLE_TO_TYPE(16, u64, true);
|
||||
TEST_CASTABLE_TO_TYPE(-16, s64, true);
|
||||
#endif
|
||||
|
||||
#define TEST_CASTABLE_TO_TYPE_VAR(width) do { \
|
||||
u ## width u ## width ## var = 0; \
|
||||
s ## width s ## width ## var = 0; \
|
||||
\
|
||||
/* Constant expressions that fit types. */ \
|
||||
TEST_CASTABLE_TO_TYPE(type_max(u ## width), u ## width, true); \
|
||||
TEST_CASTABLE_TO_TYPE(type_min(u ## width), u ## width, true); \
|
||||
TEST_CASTABLE_TO_TYPE(type_max(u ## width), u ## width ## var, true); \
|
||||
TEST_CASTABLE_TO_TYPE(type_min(u ## width), u ## width ## var, true); \
|
||||
TEST_CASTABLE_TO_TYPE(type_max(s ## width), s ## width, true); \
|
||||
TEST_CASTABLE_TO_TYPE(type_min(s ## width), s ## width, true); \
|
||||
TEST_CASTABLE_TO_TYPE(type_max(s ## width), s ## width ## var, true); \
|
||||
TEST_CASTABLE_TO_TYPE(type_min(u ## width), s ## width ## var, true); \
|
||||
/* Constant expressions that do not fit types. */ \
|
||||
TEST_CASTABLE_TO_TYPE(type_max(u ## width), s ## width, false); \
|
||||
TEST_CASTABLE_TO_TYPE(type_max(u ## width), s ## width ## var, false); \
|
||||
TEST_CASTABLE_TO_TYPE(type_min(s ## width), u ## width, false); \
|
||||
TEST_CASTABLE_TO_TYPE(type_min(s ## width), u ## width ## var, false); \
|
||||
/* Non-constant expression with mismatched type. */ \
|
||||
TEST_CASTABLE_TO_TYPE(s ## width ## var, u ## width, false); \
|
||||
TEST_CASTABLE_TO_TYPE(u ## width ## var, s ## width, false); \
|
||||
} while (0)
|
||||
|
||||
#define TEST_CASTABLE_TO_TYPE_RANGE(width) do { \
|
||||
unsigned long big = U ## width ## _MAX; \
|
||||
signed long small = S ## width ## _MIN; \
|
||||
u ## width u ## width ## var = 0; \
|
||||
s ## width s ## width ## var = 0; \
|
||||
\
|
||||
/* Constant expression in range. */ \
|
||||
TEST_CASTABLE_TO_TYPE(U ## width ## _MAX, u ## width, true); \
|
||||
TEST_CASTABLE_TO_TYPE(U ## width ## _MAX, u ## width ## var, true); \
|
||||
TEST_CASTABLE_TO_TYPE(S ## width ## _MIN, s ## width, true); \
|
||||
TEST_CASTABLE_TO_TYPE(S ## width ## _MIN, s ## width ## var, true); \
|
||||
/* Constant expression out of range. */ \
|
||||
TEST_CASTABLE_TO_TYPE((unsigned long)U ## width ## _MAX + 1, u ## width, false); \
|
||||
TEST_CASTABLE_TO_TYPE((unsigned long)U ## width ## _MAX + 1, u ## width ## var, false); \
|
||||
TEST_CASTABLE_TO_TYPE((signed long)S ## width ## _MIN - 1, s ## width, false); \
|
||||
TEST_CASTABLE_TO_TYPE((signed long)S ## width ## _MIN - 1, s ## width ## var, false); \
|
||||
/* Non-constant expression with mismatched type. */ \
|
||||
TEST_CASTABLE_TO_TYPE(big, u ## width, false); \
|
||||
TEST_CASTABLE_TO_TYPE(big, u ## width ## var, false); \
|
||||
TEST_CASTABLE_TO_TYPE(small, s ## width, false); \
|
||||
TEST_CASTABLE_TO_TYPE(small, s ## width ## var, false); \
|
||||
} while (0)
|
||||
|
||||
TEST_CASTABLE_TO_TYPE_VAR(8);
|
||||
TEST_CASTABLE_TO_TYPE_VAR(16);
|
||||
TEST_CASTABLE_TO_TYPE_VAR(32);
|
||||
#if BITS_PER_LONG == 64
|
||||
TEST_CASTABLE_TO_TYPE_VAR(64);
|
||||
#endif
|
||||
|
||||
TEST_CASTABLE_TO_TYPE_RANGE(8);
|
||||
TEST_CASTABLE_TO_TYPE_RANGE(16);
|
||||
#if BITS_PER_LONG == 64
|
||||
TEST_CASTABLE_TO_TYPE_RANGE(32);
|
||||
#endif
|
||||
kunit_info(test, "%d castable_to_type() tests finished\n", count);
|
||||
|
||||
#undef TEST_CASTABLE_TO_TYPE_RANGE
|
||||
#undef TEST_CASTABLE_TO_TYPE_VAR
|
||||
#undef TEST_CASTABLE_TO_TYPE
|
||||
}
|
||||
|
||||
static struct kunit_case overflow_test_cases[] = {
|
||||
KUNIT_CASE(u8_u8__u8_overflow_test),
|
||||
KUNIT_CASE(s8_s8__s8_overflow_test),
|
||||
@ -755,6 +1133,9 @@ static struct kunit_case overflow_test_cases[] = {
|
||||
KUNIT_CASE(shift_nonsense_test),
|
||||
KUNIT_CASE(overflow_allocation_test),
|
||||
KUNIT_CASE(overflow_size_helpers_test),
|
||||
KUNIT_CASE(overflows_type_test),
|
||||
KUNIT_CASE(same_type_test),
|
||||
KUNIT_CASE(castable_to_type_test),
|
||||
{}
|
||||
};
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user