foster/bitcoin-bitcoin-core
0
0
Fork 0
mirror of https://github.com/bitcoin/bitcoin.git synced 2025-02-13 11:25:02 -05:00
Code Issues Activity

tests: Don't assume presence of __builtin_mul_overflow in MultiplicationOverflow(...) fuzzing harness

Browse source
This commit is contained in:
practicalswift 2020-03-20 16:15:17 +00:00
parent 5bf45fe2a9
commit 7c1ac70c01
1 changed files with 14 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
src/test/fuzz/multiplication_overflow.cpp
View file

@ -10,6 +10,14 @@
#include <string> #include <string>
#include <vector> #include <vector>
#if defined(__has_builtin)
#if __has_builtin(__builtin_mul_overflow)
#define HAVE_BUILTIN_MUL_OVERFLOW
#endif
#elif defined(__GNUC__) && (__GNUC__ >= 5)
#define HAVE_BUILTIN_MUL_OVERFLOW
#endif
namespace { namespace {
template <typename T> template <typename T>
void TestMultiplicationOverflow(FuzzedDataProvider& fuzzed_data_provider) void TestMultiplicationOverflow(FuzzedDataProvider& fuzzed_data_provider)
@ -17,12 +25,18 @@ void TestMultiplicationOverflow(FuzzedDataProvider& fuzzed_data_provider)
const T i = fuzzed_data_provider.ConsumeIntegral<T>(); const T i = fuzzed_data_provider.ConsumeIntegral<T>();
const T j = fuzzed_data_provider.ConsumeIntegral<T>(); const T j = fuzzed_data_provider.ConsumeIntegral<T>();
const bool is_multiplication_overflow_custom = MultiplicationOverflow(i, j); const bool is_multiplication_overflow_custom = MultiplicationOverflow(i, j);
#if defined(HAVE_BUILTIN_MUL_OVERFLOW)
T result_builtin; T result_builtin;
const bool is_multiplication_overflow_builtin = __builtin_mul_overflow(i, j, &result_builtin); const bool is_multiplication_overflow_builtin = __builtin_mul_overflow(i, j, &result_builtin);
assert(is_multiplication_overflow_custom == is_multiplication_overflow_builtin); assert(is_multiplication_overflow_custom == is_multiplication_overflow_builtin);
if (!is_multiplication_overflow_custom) { if (!is_multiplication_overflow_custom) {
assert(i * j == result_builtin); assert(i * j == result_builtin);
} }
#else
if (!is_multiplication_overflow_custom) {
(void)(i * j);
}
#endif
} }
} // namespace } // namespace
@ -38,5 +52,4 @@ void test_one_input(const std::vector<uint8_t>& buffer)
TestMultiplicationOverflow<char>(fuzzed_data_provider); TestMultiplicationOverflow<char>(fuzzed_data_provider);
TestMultiplicationOverflow<unsigned char>(fuzzed_data_provider); TestMultiplicationOverflow<unsigned char>(fuzzed_data_provider);
TestMultiplicationOverflow<signed char>(fuzzed_data_provider); TestMultiplicationOverflow<signed char>(fuzzed_data_provider);
TestMultiplicationOverflow<bool>(fuzzed_data_provider);
} }