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Fix test that does undefined shifts greater than width of size_t 

* testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Fix
	test for 32-bit targets. Test additional allocation sizes.

From-SVN: r266163
This commit is contained in:
Jonathan Wakely 2018-11-15 00:04:12 +00:00 committed by Jonathan Wakely
parent ded7b411a8
commit aeb2b1f7fb
2 changed files with 31 additions and 22 deletions
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5
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,8 @@
2018-11-15 Jonathan Wakely <jwakely@redhat.com>
* testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Fix
test for 32-bit targets. Test additional allocation sizes.
2018-11-14 Jonathan Wakely <jwakely@redhat.com>
* scripts/create_testsuite_files: Add special_functions to the list

48
libstdc++-v3/testsuite/20_util/unsynchronized_pool_resource/allocate.cc
View File

@ -170,7 +170,7 @@ test05()
void
test06()
{
struct custom_mr : std::pmr::memory_resource
struct checking_mr : std::pmr::memory_resource
{
size_t expected_size = 0;
size_t expected_alignment = 0;
@ -178,29 +178,30 @@ test06()
struct bad_size { };
struct bad_alignment { };
void* do_allocate(std::size_t b, std::size_t a)
void* do_allocate(std::size_t bytes, std::size_t align)
{
if (expected_size != 0)
{
if (b < expected_size)
throw bad_size();
else if (a != expected_alignment)
throw bad_alignment();
// Else just throw, don't try to allocate:
throw std::bad_alloc();
}
// Internal data structures in unsynchronized_pool_resource need to
// allocate memory, so handle those normally:
if (align <= alignof(std::max_align_t))
return std::pmr::new_delete_resource()->allocate(bytes, align);
return std::pmr::new_delete_resource()->allocate(b, a);
// This is a large, unpooled allocation. Check the arguments:
if (bytes < expected_size)
throw bad_size();
else if (align != expected_alignment)
throw bad_alignment();
// Else just throw, don't really try to allocate:
throw std::bad_alloc();
}
void do_deallocate(void* p, std::size_t b, std::size_t a)
{ std::pmr::new_delete_resource()->deallocate(p, b, a); }
void do_deallocate(void* p, std::size_t bytes, std::size_t align)
{ std::pmr::new_delete_resource()->deallocate(p, bytes, align); }
bool do_is_equal(const memory_resource& r) const noexcept
{ return false; }
};
custom_mr c;
checking_mr c;
std::pmr::unsynchronized_pool_resource r({1, 1}, &c);
std::pmr::pool_options opts = r.options();
const std::size_t largest_pool = opts.largest_required_pool_block;
@ -214,23 +215,26 @@ test06()
// Try allocating various very large sizes and ensure the size requested
// from the upstream allocator is at least as large as needed.
for (int i = 1; i < 64; ++i)
for (int i = 0; i < std::numeric_limits<std::size_t>::digits; ++i)
{
for (auto b : { -1, 0, 1, 3 })
for (auto b : { -63, -5, -1, 0, 1, 3, std::numeric_limits<int>::max() })
{
std::size_t bytes = std::size_t(1) << i;
bytes += b;
bytes += b; // For negative b this can wrap to a large positive value.
c.expected_size = bytes;
c.expected_alignment = large_alignment;
bool caught_bad_alloc = false;
try {
(void) r.allocate(bytes, large_alignment);
} catch (const std::bad_alloc&) {
// expect to catch bad_alloc
} catch (custom_mr::bad_size) {
VERIFY(false);
} catch (custom_mr::bad_alignment) {
VERIFY(false);
caught_bad_alloc = true;
} catch (checking_mr::bad_size) {
VERIFY( ! "allocation from upstream resource had expected size" );
} catch (checking_mr::bad_alignment) {
VERIFY( ! "allocation from upstream resource had expected alignment" );
}
VERIFY( caught_bad_alloc );
}
}
}