Details
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Bug
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Resolution: Fixed
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Critical
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7.0.0, 7.1.0
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7.1.0-1817.x86_64
CentOS Linux release 7.8.2003 (Core)
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Untriaged
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1
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Unknown
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Build Team 2021 Sprint 24, Build Team 2021 Sprint 25, Build Team 2022 Sprint 1, Build Team 2022 Sprint 2
Description
When trying to debug a memcached issue on CB Server 7.1.0-1817 on CentOS 7, GDB is reporting that debugging information is missing even when the -debuginfo RPM is installed:
rpm -qa|grep couchbase
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couchbase-server-debuginfo-7.1.0-1817.x86_64
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couchbase-server-7.1.0-1817.x86_64
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Observed Behaviour
GDB cannot find debugging information for our version of the C++ standard library /opt/couchbase/bin/../lib/libstdc++.so.6:
gdb -p $(pgrep memcached)
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...
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(gdb) info sharedlibrary
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From To Syms Read Shared Object Library
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0x00007f0d19a102c0 0x00007f0d19a1493e Yes /opt/couchbase/bin/../lib/libnuma.so.1
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0x00007f0d19809fe0 0x00007f0d1980abfa Yes /opt/couchbase/bin/../lib/liburing.so.1
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0x00007f0d195ee290 0x00007f0d19601670 Yes (*) /opt/couchbase/bin/../lib/libz.so.1
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0x00007f0d193d0030 0x00007f0d193e2455 Yes /opt/couchbase/bin/../lib/libphosphor.so
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0x00007f0d191c3e50 0x00007f0d191c494e Yes /lib64/libdl.so.2
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0x00007f0d18fac8f0 0x00007f0d18fb7db1 Yes /lib64/libpthread.so.0
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0x00007f0d18da1230 0x00007f0d18da41bc Yes /lib64/librt.so.1
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0x00007f0d18b71b90 0x00007f0d18b9b3a7 Yes (*) /opt/couchbase/bin/../lib/liblz4.so.1
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0x00007f0d189675c0 0x00007f0d1896c97f Yes /opt/couchbase/bin/../lib/libsnappy.so.1
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0x00007f0d18495750 0x00007f0d1852abfa Yes /opt/couchbase/bin/../lib/libjemalloc.so.2
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0x00007f0d1826a2f0 0x00007f0d182836c1 Yes /opt/couchbase/bin/../lib/libevent_core-2.1.so.7
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0x00007f0d18048e90 0x00007f0d1805961f Yes /opt/couchbase/bin/../lib/libevent_extra-2.1.so.7
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0x00007f0d17e3fd50 0x00007f0d17e400f7 Yes /opt/couchbase/bin/../lib/libevent_pthreads-2.1.so.7
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0x00007f0d17c3a6f0 0x00007f0d17c3caa4 Yes /opt/couchbase/bin/../lib/libevent_openssl-2.1.so.7
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0x00007f0d179c20d0 0x00007f0d17a0fb16 Yes (*) /opt/couchbase/bin/../lib/libssl.so.1.1
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0x00007f0d1751d000 0x00007f0d176dbf4a Yes (*) /opt/couchbase/bin/../lib/libcrypto.so.1.1
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0x00007f0d17171ef0 0x00007f0d172498ba Yes (*) /opt/couchbase/bin/../lib/libstdc++.so.6
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0x00007f0d16ddc350 0x00007f0d16e47316 Yes /lib64/libm.so.6
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0x00007f0d16bc1af0 0x00007f0d16bd22dd Yes (*) /opt/couchbase/bin/../lib/libgcc_s.so.1
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0x00007f0d168109f0 0x00007f0d1696093f Yes /lib64/libc.so.6
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0x00007f0d19c18af0 0x00007f0d19c34050 Yes /lib64/ld-linux-x86-64.so.2
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(*): Shared library is missing debugging information.
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Expected behaviour
Like our other libraries (e.g. /opt/couchbase/bin/../lib/libjemalloc.so.2) debugging information should be present.
Initial analysis
The expected .debug file is missing from the RPM - for example here are all "lib" prefixed debug files in the lib directory - note no libstdc++:
# rpm -ql couchbase-server-debuginfo-7.1.0-1817.x86_64|grep /usr/lib/debug/opt/couchbase/lib/lib
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/usr/lib/debug/opt/couchbase/lib/libbreakpad_wrapper.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libchrome_zlib.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libcouchbase.so.8.0.5-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libcouchstore.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libcouchstore_views.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libcrypto.so.1.1-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libcurl.so.4.7.0-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libevent-2.1.so.7.0.0-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libevent_core-2.1.so.7.0.0-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libevent_extra-2.1.so.7.0.0-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libevent_openssl-2.1.so.7.0.0-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libevent_pthreads-2.1.so.7.0.0-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libforestdb.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libicui18n.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libicuuc.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libjemalloc.so.2-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libjseval.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/liblz4.so.1.9.2-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libnuma.so.1.0.0-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libpcre.so.1.2.12-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libpcrecpp.so.0.0.2-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libpcreposix.so.0.0.7-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libphosphor.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libsigar.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libsnappy.so.1.1.8-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libssl.so.1.1-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/liburing.so.1.0.6-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libuv.so.1.0.0-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libv8.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libv8_libbase.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libv8_libplatform.so-7.1.0-1817.x86_64.debug
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/usr/lib/debug/opt/couchbase/lib/libz.so.1.2.11-7.1.0-1817.x86_64.debug
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(Seen while investigating MB-49877).
