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105 lines
2.6 KiB
C++
105 lines
2.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// See bugs.llvm.org/PR20183
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//
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// XFAIL: with_system_cxx_lib=macosx10.11
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// XFAIL: with_system_cxx_lib=macosx10.10
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// XFAIL: with_system_cxx_lib=macosx10.9
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// XFAIL: with_system_cxx_lib=macosx10.8
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// XFAIL: with_system_cxx_lib=macosx10.7
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// <random>
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// class random_device;
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// explicit random_device(const string& token = implementation-defined);
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// For the following ctors, the standard states: "The semantics and default
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// value of the token parameter are implementation-defined". Implementations
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// therefore aren't required to accept any string, but the default shouldn't
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// throw.
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#include <random>
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#include <system_error>
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#include <cassert>
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#if !defined(_WIN32)
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#include <unistd.h>
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#endif
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#include "test_macros.h"
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bool is_valid_random_device(const std::string &token) {
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#if defined(_LIBCPP_USING_DEV_RANDOM)
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// Not an exhaustive list: they're the only tokens that are tested below.
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return token == "/dev/urandom" || token == "/dev/random";
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#else
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return token == "/dev/urandom";
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#endif
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}
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void check_random_device_valid(const std::string &token) {
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std::random_device r(token);
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}
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void check_random_device_invalid(const std::string &token) {
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#ifndef TEST_HAS_NO_EXCEPTIONS
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try {
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std::random_device r(token);
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LIBCPP_ASSERT(false);
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} catch (const std::system_error&) {
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}
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#else
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((void)token);
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#endif
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}
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int main(int, char**) {
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{
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std::random_device r;
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}
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{
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std::string token = "wrong file";
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check_random_device_invalid(token);
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}
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{
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std::string token = "/dev/urandom";
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if (is_valid_random_device(token))
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check_random_device_valid(token);
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else
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check_random_device_invalid(token);
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}
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{
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std::string token = "/dev/random";
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if (is_valid_random_device(token))
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check_random_device_valid(token);
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else
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check_random_device_invalid(token);
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}
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#if !defined(_WIN32)
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// Test that random_device(const string&) properly handles getting
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// a file descriptor with the value '0'. Do this by closing the standard
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// streams so that the descriptor '0' is available.
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{
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int ec;
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ec = close(STDIN_FILENO);
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assert(!ec);
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ec = close(STDOUT_FILENO);
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assert(!ec);
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ec = close(STDERR_FILENO);
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assert(!ec);
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std::random_device r;
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}
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#endif // !defined(_WIN32)
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return 0;
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}
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