2019-11-06 12:36:56 +00:00
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#if 0
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2019-08-31 21:39:17 +00:00
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#include <Functions/IFunction.h>
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#include <Functions/FunctionFactory.h>
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#include <Functions/FunctionHelpers.h>
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#include <DataTypes/DataTypeString.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <Columns/ColumnString.h>
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2019-11-06 11:17:12 +00:00
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#include <Interpreters/Context.h>
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2021-10-02 07:13:14 +00:00
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#include <base/scope_guard.h>
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2019-08-31 21:39:17 +00:00
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#include <thread>
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#include <memory>
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#include <cstdlib>
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#include <unistd.h>
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2020-05-30 20:02:44 +00:00
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#include <sys/mman.h>
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2022-09-18 00:24:56 +00:00
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#include <dlfcn.h>
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2019-08-31 21:39:17 +00:00
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int ILLEGAL_COLUMN;
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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extern const int BAD_ARGUMENTS;
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2020-05-30 20:45:30 +00:00
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extern const int CANNOT_ALLOCATE_MEMORY;
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2022-09-18 00:24:56 +00:00
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extern const int CANNOT_DLOPEN;
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2023-02-24 23:24:29 +00:00
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extern const int LOGICAL_ERROR;
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2019-08-31 21:39:17 +00:00
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}
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/// Various illegal actions to test diagnostic features of ClickHouse itself. Should not be enabled in production builds.
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class FunctionTrap : public IFunction
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{
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2019-11-06 11:17:12 +00:00
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private:
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2021-06-01 12:20:52 +00:00
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ContextPtr context;
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2019-11-06 11:17:12 +00:00
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2019-08-31 21:39:17 +00:00
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public:
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static constexpr auto name = "trap";
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2021-06-01 12:20:52 +00:00
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static FunctionPtr create(ContextPtr context)
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2019-08-31 21:39:17 +00:00
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{
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2019-11-06 11:17:12 +00:00
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return std::make_shared<FunctionTrap>(context);
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2019-08-31 21:39:17 +00:00
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}
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2021-06-01 12:20:52 +00:00
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FunctionTrap(ContextPtr context_) : context(context_) {}
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2019-11-06 11:17:12 +00:00
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2019-08-31 21:39:17 +00:00
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String getName() const override
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{
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return name;
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}
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size_t getNumberOfArguments() const override
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{
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return 1;
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}
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2021-06-22 16:21:23 +00:00
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
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2021-04-29 14:48:26 +00:00
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2019-08-31 21:39:17 +00:00
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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if (!isString(arguments[0]))
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2023-01-23 21:13:58 +00:00
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "The only argument for function {} must be constant String", getName());
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2019-08-31 21:39:17 +00:00
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return std::make_shared<DataTypeUInt8>();
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}
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2020-12-17 03:45:46 +00:00
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[[clang::optnone]]
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & block, const DataTypePtr & result_type, size_t input_rows_count) const override
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2019-08-31 21:39:17 +00:00
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{
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2020-12-17 03:45:46 +00:00
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if (const ColumnConst * column = checkAndGetColumnConst<ColumnString>(block[0].column.get()))
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2019-08-31 21:39:17 +00:00
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{
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String mode = column->getValue<String>();
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if (mode == "read nullptr c++")
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{
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volatile int x = *reinterpret_cast<const volatile int *>(0);
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(void)x;
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}
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else if (mode == "read nullptr asm")
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{
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__asm__ volatile ("movq $0, %rax");
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__asm__ volatile ("movq (%rax), %rax");
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}
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else if (mode == "illegal instruction")
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{
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__asm__ volatile ("ud2a");
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}
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else if (mode == "abort")
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{
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abort();
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}
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2019-12-23 20:26:46 +00:00
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else if (mode == "std::terminate")
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{
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std::terminate();
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}
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2019-08-31 21:39:17 +00:00
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else if (mode == "use after free")
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{
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int * x_ptr;
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{
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auto x = std::make_unique<int>();
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x_ptr = x.get();
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}
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*x_ptr = 1;
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(void)x_ptr;
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}
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else if (mode == "use after scope")
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{
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volatile int * x_ptr;
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[&]{
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volatile int x = 0;
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x_ptr = &x;
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(void)x;
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}();
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[&]{
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volatile int y = 1;
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*x_ptr = 2;
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(void)y;
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}();
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(void)x_ptr;
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}
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else if (mode == "uninitialized memory")
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{
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int x;
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(void)write(2, &x, sizeof(x));
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}
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else if (mode == "data race")
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{
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int x = 0;
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std::thread t1([&]{ ++x; });
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std::thread t2([&]{ ++x; });
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t1.join();
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t2.join();
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}
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2020-01-02 07:31:25 +00:00
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else if (mode == "throw exception")
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{
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std::vector<int>().at(0);
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}
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2019-11-06 11:17:12 +00:00
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else if (mode == "access context")
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{
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2022-09-18 00:24:56 +00:00
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(void)context->getCurrentQueryId();
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2019-11-06 11:17:12 +00:00
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}
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2020-12-17 03:45:46 +00:00
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else if (mode == "stack overflow")
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{
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executeImpl(block, result_type, input_rows_count);
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}
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else if (mode == "harmful function")
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{
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double res = drand48();
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(void)res;
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}
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2020-05-30 20:02:44 +00:00
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else if (mode == "mmap many")
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{
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std::vector<void *> maps;
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SCOPE_EXIT(
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{
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//for (void * map : maps)
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// munmap(map, 4096);
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});
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while (true)
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{
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void * hint = reinterpret_cast<void *>(
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std::uniform_int_distribution<intptr_t>(0x100000000000UL, 0x700000000000UL)(thread_local_rng));
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void * map = mmap(hint, 4096, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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if (MAP_FAILED == map)
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throwFromErrno("Allocator: Cannot mmap", ErrorCodes::CANNOT_ALLOCATE_MEMORY);
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maps.push_back(map);
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}
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}
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2022-09-18 00:24:56 +00:00
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else if (mode == "dlopen")
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{
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void * handle = dlopen("libc.so.6", RTLD_NOW);
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if (!handle)
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throw Exception(ErrorCodes::CANNOT_DLOPEN, "Cannot dlopen: ({})", dlerror()); // NOLINT(concurrency-mt-unsafe) // MT-Safe on Linux, see man dlerror
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}
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2023-02-24 21:35:51 +00:00
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else if (mode == "logical error")
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{
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throw Exception(ErrorCodes::LOGICAL_ERROR, "Logical error: trap");
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}
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2019-08-31 21:39:17 +00:00
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else
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2023-01-23 21:13:58 +00:00
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Unknown trap mode");
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2019-08-31 21:39:17 +00:00
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}
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else
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2023-01-23 21:13:58 +00:00
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throw Exception(ErrorCodes::ILLEGAL_COLUMN, "The only argument for function {} must be constant String", getName());
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2019-08-31 21:39:17 +00:00
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2020-12-17 03:45:46 +00:00
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return result_type->createColumnConst(input_rows_count, 0ULL);
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2019-08-31 21:39:17 +00:00
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}
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};
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2022-07-04 07:01:39 +00:00
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REGISTER_FUNCTION(Trap)
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2019-08-31 21:39:17 +00:00
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{
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factory.registerFunction<FunctionTrap>();
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}
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}
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#endif
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