[libc++][test] Make deallocate_size.pass.cpp MSVC-friendly
#165162
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frederick-vs-ja
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@llvm/pr-subscribers-libcxx Author: A. Jiang (frederick-vs-ja) ChangesThis patch contains several changes to
Full diff: https://github.com/llvm/llvm-project/pull/165162.diff 1 Files Affected:
diff --git a/libcxx/test/std/strings/basic.string/string.capacity/deallocate_size.pass.cpp b/libcxx/test/std/strings/basic.string/string.capacity/deallocate_size.pass.cpp
index 00f9e2b846783..b402bbc9bf823 100644
--- a/libcxx/test/std/strings/basic.string/string.capacity/deallocate_size.pass.cpp
+++ b/libcxx/test/std/strings/basic.string/string.capacity/deallocate_size.pass.cpp
@@ -12,12 +12,13 @@
#include <string>
#include <cassert>
+#include <cstddef>
#include <cstdint>
#include <type_traits>
#include "test_macros.h"
-static int allocated_;
+static std::ptrdiff_t allocated_;
template <class T, class Sz>
struct test_alloc {
@@ -40,13 +41,13 @@ struct test_alloc {
TEST_CONSTEXPR test_alloc(const test_alloc<U, Sz>&) TEST_NOEXCEPT {}
pointer allocate(size_type n, const void* = nullptr) {
- allocated_ += n;
- return std::allocator<value_type>().allocate(n);
+ allocated_ += static_cast<std::ptrdiff_t>(n);
+ return std::allocator<value_type>().allocate(static_cast<std::size_t>(n));
}
void deallocate(pointer p, size_type s) {
- allocated_ -= s;
- std::allocator<value_type>().deallocate(p, s);
+ allocated_ -= static_cast<std::ptrdiff_t>(s);
+ std::allocator<value_type>().deallocate(p, static_cast<std::size_t>(s));
}
template <class U>
@@ -68,7 +69,11 @@ void test() {
using Str = std::basic_string<char, std::char_traits<char>, test_alloc<char, Sz> >;
{
Str s(i, 't');
+#ifdef _MSVC_STL_VERSION // MSVC STL dynamically allocates one container proxy object in debug modes.
+ assert(allocated_ == 0 || allocated_ == 1 || allocated_ >= i);
+#else // ^^^ MSVC STL / other vvv
assert(allocated_ == 0 || allocated_ >= i);
+#endif // ^^^ other ^^^
}
}
assert(allocated_ == 0);
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philnik777
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This patch contains several changes to `deallocate_size.pass.cpp`: 1. `static_cast`-ing parameters to suitable types to avoid narrowing. 2. Changeing the type of `allocated_` to possibly larger and seemingly more appropriate `ptrdiff_t`. 3. Avoiding `assert`-ing count of allocations when a `basic_string` is allocated, just `assert`-ing after destruction instead.
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deallocate_size.pass.cpp MSVC-STL-friendlydeallocate_size.pass.cpp MSVC-friendly
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philnik777
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Oct 30, 2025
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/94/builds/12230 Here is the relevant piece of the build log for the reference |
DEBADRIBASAK
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…5162) This patch contains several changes to `deallocate_size.pass.cpp`: 1. `static_cast`-ing some parameters to `size_t` to avoid narrowing. 2. Changing the type of loop variable `i` to `unsigned int` avoid signedness mismatch with the constructor parameter. 3. Separately counting allocations and deallocations in variables `allocated_` and `deallocated_`, and changing their type to `uint64_t`. 4. Avoiding `assert`-ing count of allocations when a `basic_string` is allocated, just `assert`-ing after destruction instead.
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This patch contains several changes to
deallocate_size.pass.cpp:static_cast-ing some parameters tosize_tto avoid narrowing.itounsigned intavoid signedness mismatch with the constructor parameter.allocated_anddeallocated_, and changing their type touint64_t.assert-ing count of allocations when abasic_stringis allocated, justassert-ing after destruction instead.