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From db8f53df0be1daeda3159c1413549ff40696c710 Mon Sep 17 00:00:00 2001
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From: David Malcolm <dmalcolm@redhat.com>
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Date: Thu, 2 Sep 2021 17:02:33 -0400
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Subject: [PATCH 16/17] Conditionalize test for hashtable bucket sizes on
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__LIBSTDCXX_SO_VERSION >= 11
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These tests were added upstream 2020-01-20 as part of:
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libstdc++: Do not over-size hashtable buckets on range insertion
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https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=6dcf042368012e2d7ce1626ee5d378bf3ad0ccfc
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but fail when run in DTS against a system libstdc++.so from an older GCC.
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In particular, _M_insert_unique_node from the header is using the older
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implementation of
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std::__detail::_Prime_rehash_policy::_M_need_rehash
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from the dynamic library.
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23: 0000000000000000 0 FUNC GLOBAL DEFAULT UNDEF std::__detail::_Prime_rehash_policy::_M_need_rehash(unsigned long, unsigned long, unsigned long) const@GLIBCXX_3.4.18 (5)
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412: 0000000000000000 0 FUNC GLOBAL DEFAULT UNDEF std::__detail::_Prime_rehash_policy::_M_need_rehash(unsigned long, unsigned long, unsigned long) const@@GLIBCXX_3.4.18
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---
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.../23_containers/unordered_set/cons/bucket_hint.cc | 10 ++++++++++
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.../23_containers/unordered_set/modifiers/insert.cc | 9 +++++++++
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2 files changed, 19 insertions(+)
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diff --git a/libstdc++-v3/testsuite/23_containers/unordered_set/cons/bucket_hint.cc b/libstdc++-v3/testsuite/23_containers/unordered_set/cons/bucket_hint.cc
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index a3b014a3a..af231e54e 100644
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--- a/libstdc++-v3/testsuite/23_containers/unordered_set/cons/bucket_hint.cc
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+++ b/libstdc++-v3/testsuite/23_containers/unordered_set/cons/bucket_hint.cc
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@@ -29,7 +29,11 @@ void test01()
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a.reserve(2);
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std::unordered_set<int> b({ 0, 1, 0, 1, 0, 1, 0, 1 }, a.bucket_count());
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+
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+ // Fixed upstream in GCC 11
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+#if __LIBSTDCXX_SO_VERSION >= 11
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VERIFY( b.bucket_count() == a.bucket_count() );
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+#endif
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}
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void test02()
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@@ -40,7 +44,10 @@ void test02()
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std::vector<int> v { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 };
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std::unordered_set<int> b(v.begin(), v.end(), a.bucket_count());
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+ // Fixed upstream in GCC 11
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+#if __LIBSTDCXX_SO_VERSION >= 11
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VERIFY( b.bucket_count() == a.bucket_count() );
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+#endif
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}
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void test03()
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@@ -51,7 +58,10 @@ void test03()
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std::forward_list<int> fl { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 };
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std::unordered_set<int> b(fl.begin(), fl.end(), a.bucket_count());
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+ // Fixed upstream in GCC 11
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+#if __LIBSTDCXX_SO_VERSION >= 11
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VERIFY( b.bucket_count() == a.bucket_count() );
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+#endif
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}
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int main()
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diff --git a/libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/insert.cc b/libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/insert.cc
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index 015c2f872..aae8298ae 100644
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--- a/libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/insert.cc
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+++ b/libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/insert.cc
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@@ -30,7 +30,10 @@ void test01()
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auto bkt_count = a.bucket_count();
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a.insert({ 0, 1, 0, 1, 0, 1, 0, 1 });
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+ // Fixed upstream in GCC 11
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+#if __LIBSTDCXX_SO_VERSION >= 11
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VERIFY( a.bucket_count() == bkt_count );
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+#endif
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}
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void test02()
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@@ -42,7 +45,10 @@ void test02()
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auto bkt_count = a.bucket_count();
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a.insert(v.begin(), v.end());
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+ // Fixed upstream in GCC 11
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+#if __LIBSTDCXX_SO_VERSION >= 11
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VERIFY( a.bucket_count() == bkt_count );
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+#endif
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}
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void test03()
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@@ -54,7 +60,10 @@ void test03()
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auto bkt_count = a.bucket_count();
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a.insert(fl.begin(), fl.end());
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+ // Fixed upstream in GCC 11
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+#if __LIBSTDCXX_SO_VERSION >= 11
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VERIFY( a.bucket_count() == bkt_count );
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+#endif
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}
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int main()
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--
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2.31.1
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