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author | Roman Lebedev <lebedev.ri@gmail.com> | 2018-07-30 21:11:34 +0000 |
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committer | Roman Lebedev <lebedev.ri@gmail.com> | 2018-07-30 21:11:34 +0000 |
commit | 3eadc5926b0dc8a0a9479ca7e1cebbb414ff82ea (patch) | |
tree | b2bf1c6ddc83af5aadbd94ace0edc0f9b4124a9e /test/ubsan/TestCases/ImplicitConversion/integer-truncation.c | |
parent | 81eee417591e5679d09ceef4bce705b4fda2477e (diff) |
[NFC] Rename test/ubsan/TestCases/{ImplicitCast => ImplicitConversion}
Just to be consistent with the rest.
I should have done that in the commit itself, but the filepaths
is one thing i forgot to verify :S
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@338307 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/ubsan/TestCases/ImplicitConversion/integer-truncation.c')
-rw-r--r-- | test/ubsan/TestCases/ImplicitConversion/integer-truncation.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/test/ubsan/TestCases/ImplicitConversion/integer-truncation.c b/test/ubsan/TestCases/ImplicitConversion/integer-truncation.c new file mode 100644 index 000000000..995eb7d0f --- /dev/null +++ b/test/ubsan/TestCases/ImplicitConversion/integer-truncation.c @@ -0,0 +1,63 @@ +// RUN: %clang -x c -fsanitize=implicit-integer-truncation %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK +// RUN: %clangxx -x c++ -fsanitize=implicit-integer-truncation %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK + +#include <stdint.h> + +#if !defined(__cplusplus) +#define bool _Bool +#endif + +int main() { +// CHECK-NOT: integer-truncation.c + + // Negative tests. Even if they produce unexpected results, this sanitizer does not care. + int8_t n0 = (~((uint32_t)0)); // ~0 -> -1, but do not warn. + uint8_t n2 = 128; + uint8_t n3 = 255; + // Bools do not count + bool b0 = (~((uint32_t)0)); + bool b1 = 255; + + // Explicit and-ing of bits will silence it. + uint8_t nc0 = (~((uint32_t)0)) & 255; + + // Explicit casts + uint8_t i0 = (uint8_t)(~((uint32_t)0)); + +#if defined(__cplusplus) + uint8_t i1 = uint8_t(~(uint32_t(0))); + uint8_t i2 = static_cast<uint8_t>(~(uint32_t(0))); +#endif + + // Positive tests. + + uint8_t t_b0 = (~((uint16_t)(0))); +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:18: runtime error: implicit conversion from type 'int' of value -1 (32-bit, signed) to type 'uint8_t' (aka 'unsigned char') changed the value to 255 (8-bit, unsigned) + + uint8_t t_b1 = (~((uint32_t)0)); +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:18: runtime error: implicit conversion from type 'uint32_t' (aka 'unsigned int') of value 4294967295 (32-bit, unsigned) to type 'uint8_t' (aka 'unsigned char') changed the value to 255 (8-bit, unsigned) + uint16_t t_b2 = (~((uint32_t)0)); +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:19: runtime error: implicit conversion from type 'uint32_t' (aka 'unsigned int') of value 4294967295 (32-bit, unsigned) to type 'uint16_t' (aka 'unsigned short') changed the value to 65535 (16-bit, unsigned) + + uint8_t t_b3 = ~((uint64_t)0); +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:18: runtime error: implicit conversion from type 'uint64_t' (aka 'unsigned long{{[^']*}}') of value 18446744073709551615 (64-bit, unsigned) to type 'uint8_t' (aka 'unsigned char') changed the value to 255 (8-bit, unsigned) + uint16_t t_b4 = ~((uint64_t)0); +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:19: runtime error: implicit conversion from type 'uint64_t' (aka 'unsigned long{{[^']*}}') of value 18446744073709551615 (64-bit, unsigned) to type 'uint16_t' (aka 'unsigned short') changed the value to 65535 (16-bit, unsigned) + uint32_t t_b5 = ~((uint64_t)0); +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:19: runtime error: implicit conversion from type 'uint64_t' (aka 'unsigned long{{[^']*}}') of value 18446744073709551615 (64-bit, unsigned) to type 'uint32_t' (aka 'unsigned int') changed the value to 4294967295 (32-bit, unsigned) + + int8_t t1 = 255; +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:15: runtime error: implicit conversion from type 'int' of value 255 (32-bit, signed) to type 'int8_t' (aka 'signed char') changed the value to -1 (8-bit, signed) + uint8_t t2 = 256; +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:16: runtime error: implicit conversion from type 'int' of value 256 (32-bit, signed) to type 'uint8_t' (aka 'unsigned char') changed the value to 0 (8-bit, unsigned) + int8_t t3 = 256; +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:15: runtime error: implicit conversion from type 'int' of value 256 (32-bit, signed) to type 'int8_t' (aka 'signed char') changed the value to 0 (8-bit, signed) + uint8_t t4 = 257; +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:16: runtime error: implicit conversion from type 'int' of value 257 (32-bit, signed) to type 'uint8_t' (aka 'unsigned char') changed the value to 1 (8-bit, unsigned) + int8_t t5 = 257; +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:15: runtime error: implicit conversion from type 'int' of value 257 (32-bit, signed) to type 'int8_t' (aka 'signed char') changed the value to 1 (8-bit, signed) + int8_t t6 = 128; +// CHECK: {{.*}}integer-truncation.c:[[@LINE-1]]:15: runtime error: implicit conversion from type 'int' of value 128 (32-bit, signed) to type 'int8_t' (aka 'signed char') changed the value to -128 (8-bit, signed) + + return 0; +} |