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PR libstdc++/86676 Do not assume stack buffer is aligned 

PR libstdc++/86676
	* testsuite/20_util/monotonic_buffer_resource/release.cc: Allow for
	buffer being misaligned and so returned pointer not being at start.

From-SVN: r262980
This commit is contained in:
Jonathan Wakely 2018-07-25 21:23:07 +01:00 committed by Jonathan Wakely
parent 0fc1c4290b
commit 17a6321210
2 changed files with 8 additions and 2 deletions
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4
libstdc++-v3/ChangeLog
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@ -1,5 +1,9 @@
2018-07-25 Jonathan Wakely <jwakely@redhat.com> 2018-07-25 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/86676
* testsuite/20_util/monotonic_buffer_resource/release.cc: Allow for
buffer being misaligned and so returned pointer not being at start.
* include/experimental/memory_resource: Include <cstddef> header. * include/experimental/memory_resource: Include <cstddef> header.
* acinclude.m4 (glibcxx_SUBDIRS): Add src/c++17. * acinclude.m4 (glibcxx_SUBDIRS): Add src/c++17.

6
libstdc++-v3/testsuite/20_util/monotonic_buffer_resource/release.cc
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@ -115,10 +115,12 @@ test04()
unsigned char buffer[1024]; unsigned char buffer[1024];
std::pmr::monotonic_buffer_resource mbr(buffer, sizeof(buffer), &r); std::pmr::monotonic_buffer_resource mbr(buffer, sizeof(buffer), &r);
void* p = mbr.allocate(800, 16); void* p = mbr.allocate(800, 16);
VERIFY( p == buffer ); VERIFY( p >= buffer && p < (buffer + 16) );
void* const p_in_buffer = p;
VERIFY( r.allocate_calls == 0 ); VERIFY( r.allocate_calls == 0 );
p = mbr.allocate(300, 1); p = mbr.allocate(300, 1);
VERIFY( p != buffer ); VERIFY( p != buffer );
VERIFY( p != buffer );
VERIFY( r.allocate_calls == 1 ); VERIFY( r.allocate_calls == 1 );
mbr.release(); mbr.release();
VERIFY( r.deallocate_calls == 1 ); VERIFY( r.deallocate_calls == 1 );
@ -126,7 +128,7 @@ test04()
VERIFY( r.number_of_active_allocations() == 0 ); VERIFY( r.number_of_active_allocations() == 0 );
// initial buffer should be used again now: // initial buffer should be used again now:
p = mbr.allocate(1000); p = mbr.allocate(1000);
VERIFY( p == buffer ); VERIFY( p == p_in_buffer );
VERIFY( r.allocate_calls == 1 ); VERIFY( r.allocate_calls == 1 );
} }