branch-4.1: [fix](sync_point) Fix heap-use-after-free in SyncPoint during program exit #61040#61434
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yiguolei merged 1 commit intobranch-4.1from Mar 18, 2026
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… exit (#61040) ### What problem does this PR solve? The SyncPoint singleton was being destroyed during program exit while background bthread timers were still accessing it, causing heap-use-after-free. Changed get_instance() to return a never-destructed heap-allocated pointer instead of a stack-allocated static object to prevent destruction order issues. This is a standard pattern for singletons accessed by background threads. ``` 11:47:40 #0 0x5582a963153d in operator new(unsigned long) (/root/doris/cloud/ut_build_ASAN/test/recycler_test+0x122b53d) (BuildId: 1191affa24589f52) 11:47:40 #1 0x5582ab0aa52f in doris::SyncPoint::SyncPoint() /root/doris/common/cpp/sync_point.cpp:77:9 11:47:40 #2 0x5582ab0aa46b in doris::SyncPoint::get_instance() /root/doris/common/cpp/sync_point.cpp:73:20 11:47:40 #3 0x5582aae33ee8 in doris::cloud::memkv::Transaction::get(std::basic_string_view<char, std::char_traits<char>>, std::basic_string_view<char, std::char_traits<char>>, std::unique_ptr<doris::cloud::RangeGetIterator, std::default_delete<doris::cloud::RangeGetIterator>>*, bool, int) /root/doris/cloud/src/meta-store/mem_txn_kv.cpp:276:5 11:47:40 #4 0x5582a968f49f in doris::cloud::txn_get(doris::cloud::TxnKv*, std::basic_string_view<char, std::char_traits<char>>, std::basic_string_view<char, std::char_traits<char>>, std::unique_ptr<doris::cloud::RangeGetIterator, std::default_delete<doris::cloud::RangeGetIterator>>&) /root/doris/cloud/src/recycler/recycler.cpp:99:18 11:47:40 #5 0x5582a9657090 in doris::cloud::InstanceRecycler::scan_and_recycle(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>, std::basic_string_view<char, std::char_traits<char>>, std::function<int (std::basic_string_view<char, std::char_traits<char>>, std::basic_string_view<char, std::char_traits<char>>)>, std::function<int ()>) /root/doris/cloud/src/recycler/recycler.cpp:2976:23 11:47:40 #6 0x5582a9686153 in doris::cloud::InstanceRecycler::recycle_rowsets() /root/doris/cloud/src/recycler/recycler.cpp:2587:15 11:47:40 #7 0x5582a96a8d47 in doris::cloud::RecyclerTest_recycle_empty_Test::TestBody() /root/doris/cloud/test/recycler_test.cpp:1136:5 ```
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yiguolei
approved these changes
Mar 18, 2026
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Cherry-picked from #61040