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880e38b206
This patch fixes the following bugs, all of which were discovered while testing a 32 bit build on a 64 bit machine. * path.itr/iterator.pass.cpp has undefined behavior. 'path::iterator' stashes the value of the element inside the iterator. This violates the BiDirIterator requirements but is allowed for path::iterator. However this means that using reverse_iterator<path::iterator> has undefined behavior because it assumes that 'Iter tmp = it; return *tmp' will not create a dangling reference. However it does, and this caused this particular test to fail. * path.native.obs/string_alloc.pass.cpp tested the SSO with a long string. On 32 bit builds std::wstring only has the SSO for strings of size 2. The test was using a string of size 4. * fs.op.space/space.pass.cpp had overflows while calculating the expected values. The fix here is to convert the statvfs data members to std::uintmax_t before multiplying them. The internal implementation already does this but the tests needed to do it as well. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@273078 91177308-0d34-0410-b5e6-96231b3b80d8
139 lines
4.2 KiB
C++
139 lines
4.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03
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// <experimental/filesystem>
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// class path
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// template <class ECharT, class Traits = char_traits<ECharT>,
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// class Allocator = allocator<ECharT>>
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// basic_string<ECharT, Traits, Allocator>
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// string(const Allocator& a = Allocator()) const;
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#include <experimental/filesystem>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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#include "test_iterators.h"
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#include "count_new.hpp"
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#include "min_allocator.h"
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#include "filesystem_test_helper.hpp"
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namespace fs = std::experimental::filesystem;
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// the SSO is always triggered for strings of size 2.
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MultiStringType shortString = MKSTR("a");
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MultiStringType longString = MKSTR("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/123456789/abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
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template <class CharT>
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void doShortStringTest(MultiStringType const& MS) {
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using namespace fs;
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using Ptr = CharT const*;
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using Str = std::basic_string<CharT>;
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using Alloc = std::allocator<CharT>;
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Ptr value = MS;
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const path p((const char*)MS);
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{
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DisableAllocationGuard g;
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Str s = p.string<CharT>();
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assert(s == value);
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Str s2 = p.string<CharT>(Alloc{});
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assert(s2 == value);
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}
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using MAlloc = malloc_allocator<CharT>;
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MAlloc::reset();
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{
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using Traits = std::char_traits<CharT>;
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using AStr = std::basic_string<CharT, Traits, MAlloc>;
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DisableAllocationGuard g;
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AStr s = p.string<CharT, Traits, MAlloc>();
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assert(s == value);
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assert(MAlloc::alloc_count == 0);
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assert(MAlloc::outstanding_alloc() == 0);
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}
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MAlloc::reset();
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{ // Other allocator - provided copy
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using Traits = std::char_traits<CharT>;
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using AStr = std::basic_string<CharT, Traits, MAlloc>;
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DisableAllocationGuard g;
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MAlloc a;
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// don't allow another allocator to be default constructed.
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MAlloc::disable_default_constructor = true;
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AStr s = p.string<CharT, Traits, MAlloc>(a);
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assert(s == value);
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assert(MAlloc::alloc_count == 0);
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assert(MAlloc::outstanding_alloc() == 0);
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}
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MAlloc::reset();
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}
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template <class CharT>
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void doLongStringTest(MultiStringType const& MS) {
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using namespace fs;
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using Ptr = CharT const*;
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using Str = std::basic_string<CharT>;
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Ptr value = MS;
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const path p((const char*)MS);
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{ // Default allocator
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using Alloc = std::allocator<CharT>;
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Str s = p.string<CharT>();
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assert(s == value);
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Str s2 = p.string<CharT>(Alloc{});
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assert(s2 == value);
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}
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using MAlloc = malloc_allocator<CharT>;
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MAlloc::reset();
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{ // Other allocator - default construct
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using Traits = std::char_traits<CharT>;
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using AStr = std::basic_string<CharT, Traits, MAlloc>;
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DisableAllocationGuard g;
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AStr s = p.string<CharT, Traits, MAlloc>();
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assert(s == value);
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assert(MAlloc::alloc_count > 0);
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assert(MAlloc::outstanding_alloc() == 1);
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}
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MAlloc::reset();
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{ // Other allocator - provided copy
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using Traits = std::char_traits<CharT>;
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using AStr = std::basic_string<CharT, Traits, MAlloc>;
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DisableAllocationGuard g;
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MAlloc a;
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// don't allow another allocator to be default constructed.
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MAlloc::disable_default_constructor = true;
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AStr s = p.string<CharT, Traits, MAlloc>(a);
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assert(s == value);
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assert(MAlloc::alloc_count > 0);
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assert(MAlloc::outstanding_alloc() == 1);
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}
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MAlloc::reset();
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/////////////////////////////////////////////////////////////////////////////
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}
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int main()
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{
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using namespace fs;
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{
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auto const& S = shortString;
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doShortStringTest<char>(S);
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doShortStringTest<wchar_t>(S);
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doShortStringTest<char16_t>(S);
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doShortStringTest<char32_t>(S);
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}
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{
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auto const& S = longString;
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doLongStringTest<char>(S);
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doLongStringTest<wchar_t>(S);
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doLongStringTest<char16_t>(S);
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doLongStringTest<char32_t>(S);
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}
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}
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