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llvm-project/clang/test/SemaCXX/unavailable_aligned_allocation.cpp
YexuanXiao 7c402b8b81
Reland [Clang] Make the SizeType, SignedSizeType and PtrdiffType be named sugar types (#149613) 
The checks for the 'z' and 't' format specifiers added in the original
PR #143653 had some issues and were overly strict, causing some build
failures and were consequently reverted at
4c85bf2fe8.

In the latest commit
27c58629ec,
I relaxed the checks for the 'z' and 't' format specifiers, so warnings
are now only issued when they are used with mismatched types.

The original intent of these checks was to diagnose code that assumes
the underlying type of `size_t` is `unsigned` or `unsigned long`, for
example:

```c
printf("%zu", 1ul); // Not portable, but not an error when size_t is unsigned long
```  

However, it produced a significant number of false positives. This was
partly because Clang does not treat the `typedef` `size_t` and
`__size_t` as having a common "sugar" type, and partly because a large
amount of existing code either assumes `unsigned` (or `unsigned long`)
is `size_t`, or they define the equivalent of size_t in their own way
(such as
sanitizer_internal_defs.h).2e67dcfdcd/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h (L203)
2025-07-19 03:44:14 -03:00

219 lines
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// RUN: %clang_cc1 -triple x86_64-apple-macosx10.12.0 -fexceptions -faligned-alloc-unavailable -std=c++1z -verify -DMACOS %s
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.12.0 -fexceptions -std=c++1z -verify -DNO_ERRORS %s
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.12.0 -fexceptions -faligned-allocation -faligned-alloc-unavailable -std=c++14 -verify -DMACOS %s
// RUN: %clang_cc1 -triple arm64-apple-ios10.0.0 -fexceptions -faligned-alloc-unavailable -std=c++1z -verify -DIOS %s
// RUN: %clang_cc1 -triple arm64-apple-ios10.0.0 -fexceptions -std=c++1z -verify -DNO_ERRORS %s
// RUN: %clang_cc1 -triple arm64-apple-tvos10.0.0 -fexceptions -faligned-alloc-unavailable -std=c++1z -verify -DTVOS %s
// RUN: %clang_cc1 -triple arm64-apple-tvos10.0.0 -fexceptions -std=c++1z -verify -DNO_ERRORS %s
// RUN: %clang_cc1 -triple armv7k-apple-watchos3.0.0 -fexceptions -faligned-alloc-unavailable -std=c++1z -verify -DWATCHOS %s
// RUN: %clang_cc1 -triple armv7k-apple-watchos3.0.0 -fexceptions -std=c++1z -verify -DNO_ERRORS %s
// RUN: %clang_cc1 -triple s390x-none-zos -fexceptions -faligned-alloc-unavailable -std=c++1z -verify -DZOS %s
// RUN: %clang_cc1 -triple s390x-none-zos -fexceptions -std=c++1z -verify -DNO_ERRORS %s
// RUN: %clang_cc1 -triple s390x-none-zos -fexceptions -faligned-allocation -faligned-alloc-unavailable -std=c++14 -verify -DZOS %s
namespace std {
typedef decltype(sizeof(0)) size_t;
enum class align_val_t : std::size_t {};
struct nothrow_t {};
nothrow_t nothrow;
}
void *operator new(std::size_t __sz, const std::nothrow_t&) noexcept;
void *operator new[](std::size_t __sz, const std::nothrow_t&) noexcept;
void *operator new(std::size_t __sz, std::align_val_t, const std::nothrow_t&) noexcept;
void *operator new[](std::size_t __sz, std::align_val_t, const std::nothrow_t&) noexcept;
void operator delete(void *, std::align_val_t, const std::nothrow_t&);
void operator delete[](void *, std::align_val_t, const std::nothrow_t&);
void operator delete(void*, std::size_t, std::align_val_t) noexcept;
void operator delete[](void*, std::size_t, std::align_val_t) noexcept;
void *operator new(std::size_t, std::align_val_t, long long);
struct alignas(256) OveralignedS {
int x[16];
};
struct S {
int x[16];
};
void test() {
auto *p = new S;
delete p;
p = new (std::nothrow) S;
auto *pa = new S[4];
delete[] pa;
pa = new (std::nothrow) S[4];
}
void testOveraligned() {
auto *p = new OveralignedS;
p = new ((std::align_val_t)8) OveralignedS;
delete p;
p = new (std::nothrow) OveralignedS;
auto *pa = new OveralignedS[4];
pa = new ((std::align_val_t)8) OveralignedS[4];
delete[] pa;
pa = new (std::nothrow) OveralignedS[4];
// No error here since it is not calling a replaceable allocation function.
p = new ((std::align_val_t)8, 10LL) OveralignedS;
}
#ifdef NO_ERRORS
// expected-no-diagnostics
#else
// expected-error-re@-16 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is {{only|not}} available on}}
// expected-note@-17 {{if you supply your own aligned allocation functions}}
// expected-error-re@-18 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is {{only|not}} available on}}
// expected-note@-19 {{if you supply your own aligned allocation functions}}
// expected-error-re@-20 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is {{only|not}} available on}}
// expected-note@-21 {{if you supply your own aligned allocation functions}}
// expected-error-re@-22 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is {{only|not}} available on}}
// expected-note@-23 {{if you supply your own aligned allocation functions}}
// expected-error-re@-24 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is {{only|not}} available on}}
// expected-note@-25 {{if you supply your own aligned allocation functions}}
// expected-error-re@-26 {{aligned allocation function of type 'void *(std::size_t, std::align_val_t, const std::nothrow_t &) noexcept' is {{only|not}} available on}}
// expected-note@-27 {{if you supply your own aligned allocation functions}}
// expected-error-re@-28 {{aligned deallocation function of type 'void (void *, std::align_val_t, const std::nothrow_t &) noexcept' is {{only|not}} available on}}
// expected-note@-29 {{if you supply your own aligned allocation functions}}
// expected-error-re@-29 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is {{only|not}} available on}}
// expected-note@-30 {{if you supply your own aligned allocation functions}}
// expected-error-re@-31 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is {{only|not}} available on}}
// expected-note@-32 {{if you supply your own aligned allocation functions}}
// expected-error-re@-33 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is {{only|not}} available on}}
// expected-note@-34 {{if you supply your own aligned allocation functions}}
// expected-error-re@-35 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is {{only|not}} available on}}
// expected-note@-36 {{if you supply your own aligned allocation functions}}
// expected-error-re@-37 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is {{only|not}} available on}}
// expected-note@-38 {{if you supply your own aligned allocation functions}}
// expected-error-re@-39 {{aligned allocation function of type 'void *(std::size_t, std::align_val_t, const std::nothrow_t &) noexcept' is {{only|not}} available on}}
// expected-note@-40 {{if you supply your own aligned allocation functions}}
// expected-error-re@-41 {{aligned deallocation function of type 'void (void *, std::align_val_t, const std::nothrow_t &) noexcept' is {{only|not}} available on}}
// expected-note@-42 {{if you supply your own aligned allocation functions}}
#endif
void testOveralignedCheckOS() {
auto *p = new OveralignedS;
}
#ifdef NO_ERRORS
// expected-no-diagnostics
#else
#if defined(IOS)
// expected-error@-7 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is only available on iOS 11 or newer}}
// expected-error@-8 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is only available on iOS 11 or newer}}}
#elif defined(TVOS)
// expected-error@-10 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is only available on tvOS 11 or newer}}}
// expected-error@-11 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is only available on tvOS 11 or newer}}}
#elif defined(WATCHOS)
// expected-error@-13 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is only available on watchOS 4 or newer}}}
// expected-error@-14 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is only available on watchOS 4 or newer}}}
#elif defined(MACOS)
// expected-error@-16 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is only available on macOS 10.13 or newer}}}
// expected-error@-17 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is only available on macOS 10.13 or newer}}}
#elif defined(ZOS)
// expected-error@-19 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is not available on z/OS}}}
// expected-error@-20 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is not available on z/OS}}}
#endif
// expected-note@-23 2 {{if you supply your own aligned allocation functions}}
#endif
// Test that diagnostics are produced when an unavailable aligned deallocation
// function is called from a deleting destructor.
struct alignas(256) OveralignedS2 {
int a[4];
virtual ~OveralignedS2();
};
OveralignedS2::~OveralignedS2() {}
#ifdef NO_ERRORS
// expected-no-diagnostics
#else
#if defined(IOS)
// expected-error@-6 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is only available on iOS 11 or newer}}}
// expected-note@-7 {{if you supply your own aligned allocation functions}}
#elif defined(TVOS)
// expected-error@-9 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is only available on tvOS 11 or newer}}}
// expected-note@-10 {{if you supply your own aligned allocation functions}}
#elif defined(WATCHOS)
// expected-error@-12 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is only available on watchOS 4 or newer}}}
// expected-note@-13 {{if you supply your own aligned allocation functions}}
#elif defined(MACOS)
// expected-error@-15 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is only available on macOS 10.13 or newer}}}
// expected-note@-16 {{if you supply your own aligned allocation functions}}
#elif defined(ZOS)
// expected-error@-18 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is not available on z/OS}}}
// expected-note@-19 {{if you supply your own aligned allocation functions}}
#endif
#endif
void testExplicitOperatorNewDelete() {
void *p = operator new(128);
operator delete(p);
p = operator new[](128);
operator delete[](p);
p = __builtin_operator_new(128);
__builtin_operator_delete(p);
}
void testExplicitOperatorNewDeleteOveraligned() {
void *p = operator new(128, (std::align_val_t)64);
operator delete(p, (std::align_val_t)64);
p = operator new[](128, (std::align_val_t)64);
operator delete[](p, (std::align_val_t)64);
p = __builtin_operator_new(128, (std::align_val_t)64);
__builtin_operator_delete(p, (std::align_val_t)64);
}
#ifdef NO_ERRORS
// expected-no-diagnostics
#else
// expected-error-re@-11 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is {{only|not}} available on}}
// expected-note@-12 {{if you supply your own aligned allocation functions}}
// expected-error-re@-13 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is {{only|not}} available on}}
// expected-note@-14 {{if you supply your own aligned allocation functions}}
// expected-error-re@-15 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is {{only|not}} available on}}
// expected-note@-16 {{if you supply your own aligned allocation functions}}
// expected-error-re@-17 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is {{only|not}} available on}}
// expected-note@-18 {{if you supply your own aligned allocation functions}}
// expected-error-re@-19 {{aligned allocation function of type 'void *(__size_t, enum std::align_val_t)' is {{only|not}} available on}}
// expected-note@-20 {{if you supply your own aligned allocation functions}}
// expected-error-re@-21 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is {{only|not}} available on}}
// expected-note@-22 {{if you supply your own aligned allocation functions}}
#endif
// No errors if user-defined aligned allocation functions are available.
void *operator new(std::size_t __sz, std::align_val_t) {
static char array[256];
return &array;
}
void operator delete(void *p, std::align_val_t) {
}
void operator delete(void *p, std::size_t __sz, std::align_val_t) {
}
void testOveraligned2() {
auto p = new ((std::align_val_t)8) OveralignedS;
delete p;
}
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