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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file LICENSE.rst or https://cmake.org/licensing for details. */
/*
* Fuzzer for CMake's math expression parser
*
* The math() command uses cmExprParserHelper to evaluate mathematical
* expressions. This fuzzer tests the expression parser for crashes,
* hangs, and undefined behavior.
*
* Coverage targets:
* - Integer arithmetic parsing
* - Operator precedence handling
* - Parentheses nesting
* - Error handling for invalid expressions
*/
#include <cstddef>
#include <cstdint>
#include <string>
#include "cmExprParserHelper.h"
// Limit input size to prevent DoS via deeply nested expressions
static constexpr size_t kMaxInputSize = 4096;
extern "C" int LLVMFuzzerTestOneInput(uint8_t const* data, size_t size)
{
if (size == 0 || size > kMaxInputSize) {
return 0;
}
// Create null-terminated string
std::string input(reinterpret_cast<char const*>(data), size);
cmExprParserHelper helper;
// Parse with different verbosity levels
int result = helper.ParseString(input.c_str(), 0);
(void)result;
// Always check result and error accessors
(void)helper.GetResult();
(void)helper.GetError();
(void)helper.GetWarning();
return 0;
}
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