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#if 0
#include <Functions/IFunction.h>
#include <Functions/FunctionFactory.h>
#include <Functions/FunctionHelpers.h>
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <Columns/ColumnString.h>
#include <Interpreters/Context.h>
#include <base/scope_guard.h>
#include <thread>
#include <memory>
#include <cstdlib>
#include <unistd.h>
#include <sys/mman.h>
#include <dlfcn.h>
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_COLUMN;
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
extern const int BAD_ARGUMENTS;
extern const int CANNOT_ALLOCATE_MEMORY;
extern const int CANNOT_DLOPEN;
extern const int LOGICAL_ERROR;
}
/// Various illegal actions to test diagnostic features of ClickHouse itself. Should not be enabled in production builds.
class FunctionTrap : public IFunction
{
private:
ContextPtr context;
public:
static constexpr auto name = "trap";
static FunctionPtr create(ContextPtr context)
{
return std::make_shared<FunctionTrap>(context);
}
FunctionTrap(ContextPtr context_) : context(context_) {}
String getName() const override
{
return name;
}
size_t getNumberOfArguments() const override
{
return 1;
}
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
if (!isString(arguments[0]))
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "The only argument for function {} must be constant String", getName());
return std::make_shared<DataTypeUInt8>();
}
[[clang::optnone]]
ColumnPtr executeImpl(const ColumnsWithTypeAndName & block, const DataTypePtr & result_type, size_t input_rows_count) const override
{
if (const ColumnConst * column = checkAndGetColumnConst<ColumnString>(block[0].column.get()))
{
String mode = column->getValue<String>();
if (mode == "read nullptr c++")
{
volatile int x = *reinterpret_cast<const volatile int *>(0);
(void)x;
}
else if (mode == "read nullptr asm")
{
__asm__ volatile ("movq $0, %rax");
__asm__ volatile ("movq (%rax), %rax");
}
else if (mode == "illegal instruction")
{
__asm__ volatile ("ud2a");
}
else if (mode == "abort")
{
abort();
}
else if (mode == "std::terminate")
{
std::terminate();
}
else if (mode == "use after free")
{
int * x_ptr;
{
auto x = std::make_unique<int>();
x_ptr = x.get();
}
*x_ptr = 1;
(void)x_ptr;
}
else if (mode == "use after scope")
{
volatile int * x_ptr;
[&]{
volatile int x = 0;
x_ptr = &x;
(void)x;
}();
[&]{
volatile int y = 1;
*x_ptr = 2;
(void)y;
}();
(void)x_ptr;
}
else if (mode == "uninitialized memory")
{
int x;
(void)write(2, &x, sizeof(x));
}
else if (mode == "data race")
{
int x = 0;
std::thread t1([&]{ ++x; });
std::thread t2([&]{ ++x; });
t1.join();
t2.join();
}
else if (mode == "throw exception")
{
std::vector<int>().at(0);
}
else if (mode == "access context")
{
(void)context->getCurrentQueryId();
}
else if (mode == "stack overflow")
{
executeImpl(block, result_type, input_rows_count);
}
else if (mode == "harmful function")
{
double res = drand48();
(void)res;
}
else if (mode == "mmap many")
{
std::vector<void *> maps;
SCOPE_EXIT(
{
//for (void * map : maps)
// munmap(map, 4096);
});
while (true)
{
void * hint = reinterpret_cast<void *>(
std::uniform_int_distribution<intptr_t>(0x100000000000UL, 0x700000000000UL)(thread_local_rng));
void * map = mmap(hint, 4096, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (MAP_FAILED == map)
throwFromErrno("Allocator: Cannot mmap", ErrorCodes::CANNOT_ALLOCATE_MEMORY);
maps.push_back(map);
}
}
else if (mode == "dlopen")
{
void * handle = dlopen("libc.so.6", RTLD_NOW);
if (!handle)
throw Exception(ErrorCodes::CANNOT_DLOPEN, "Cannot dlopen: ({})", dlerror()); // NOLINT(concurrency-mt-unsafe) // MT-Safe on Linux, see man dlerror
}
else if (mode == "logical error")
{
throw Exception(ErrorCodes::LOGICAL_ERROR, "Logical error: trap");
}
else
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Unknown trap mode");
}
else
throw Exception(ErrorCodes::ILLEGAL_COLUMN, "The only argument for function {} must be constant String", getName());
return result_type->createColumnConst(input_rows_count, 0ULL);
}
};
REGISTER_FUNCTION(Trap)
{
factory.registerFunction<FunctionTrap>();
}
}
#endif
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