[gcc r13-5127] libstdc++: Extend max_align_t special case to 64-bit HP-UX [PR77691]
Jonathan Wakely
redi@gcc.gnu.org
Thu Jan 12 20:59:32 GMT 2023
https://gcc.gnu.org/g:f629f63d2d9d7ad2c43f8e451f0f6e32b5f4d06a
commit r13-5127-gf629f63d2d9d7ad2c43f8e451f0f6e32b5f4d06a
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Thu Jan 12 10:58:13 2023 +0000
libstdc++: Extend max_align_t special case to 64-bit HP-UX [PR77691]
GCC's std::max_align_t doesn't agree with the system malloc on HP-UX, so
generalize the current hack for Solaris to apply to that target too.
libstdc++-v3/ChangeLog:
PR libstdc++/77691
* include/experimental/memory_resource
(_GLIBCXX_MAX_ALIGN_MATCHES_MALLOC): Define.
(do_allocate, do_deallocate): Check it.
* testsuite/experimental/memory_resource/new_delete_resource.cc:
Relax expected behaviour for 64-bit hppa-hp-hpux11.11.
Diff:
---
libstdc++-v3/include/experimental/memory_resource | 15 ++++++++++++---
.../experimental/memory_resource/new_delete_resource.cc | 4 ++++
2 files changed, 16 insertions(+), 3 deletions(-)
diff --git a/libstdc++-v3/include/experimental/memory_resource b/libstdc++-v3/include/experimental/memory_resource
index aa86c042d84..786392e8904 100644
--- a/libstdc++-v3/include/experimental/memory_resource
+++ b/libstdc++-v3/include/experimental/memory_resource
@@ -412,11 +412,20 @@ namespace pmr {
allocator_type get_allocator() const noexcept { return _M_alloc; }
protected:
+#if (defined __sun__ || defined __VXWORKS__) && defined __i386__
+// Cannot use max_align_t on 32-bit Solaris x86, see PR libstdc++/77691
+# define _GLIBCXX_MAX_ALIGN_MATCHES_MALLOC 0
+#elif defined __hpux__ && defined __hppa__ && defined __LP64__
+// Ignore inconsistent long double and malloc alignment (libstdc++/77691)
+# define _GLIBCXX_MAX_ALIGN_MATCHES_MALLOC 0
+#else
+# define _GLIBCXX_MAX_ALIGN_MATCHES_MALLOC 1
+#endif
+
virtual void*
do_allocate(size_t __bytes, size_t __alignment) override
{
- // Cannot use max_align_t on 32-bit Solaris x86, see PR libstdc++/77691
-#if ! ((defined __sun__ || defined __VXWORKS__) && defined __i386__)
+#if _GLIBCXX_MAX_ALIGN_MATCHES_MALLOC
if (__alignment == alignof(max_align_t))
return _M_allocate<alignof(max_align_t)>(__bytes);
#endif
@@ -442,7 +451,7 @@ namespace pmr {
do_deallocate(void* __ptr, size_t __bytes, size_t __alignment) noexcept
override
{
-#if ! ((defined __sun__ || defined __VXWORKS__) && defined __i386__)
+#if _GLIBCXX_MAX_ALIGN_MATCHES_MALLOC
if (__alignment == alignof(max_align_t))
return (void) _M_deallocate<alignof(max_align_t)>(__ptr, __bytes);
#endif
diff --git a/libstdc++-v3/testsuite/experimental/memory_resource/new_delete_resource.cc b/libstdc++-v3/testsuite/experimental/memory_resource/new_delete_resource.cc
index d121d5f2c41..a7ecb54b905 100644
--- a/libstdc++-v3/testsuite/experimental/memory_resource/new_delete_resource.cc
+++ b/libstdc++-v3/testsuite/experimental/memory_resource/new_delete_resource.cc
@@ -27,6 +27,10 @@
// See PR libstdc++/77691
# define BAD_MAX_ALIGN_T 1
#endif
+#if defined __hpux__ && defined __hppa__ && defined __LP64__
+// Ignore inconsistent long double and malloc alignment (libstdc++/77691)
+# define BAD_MAX_ALIGN_T 1
+#endif
bool new_called = false;
bool delete_called = false;
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