What is gcda file?

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postgres=# exit;
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/thread.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/strerror.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/snprintf.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/qsort.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/pqsignal.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/pgstrsignal.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/pgstrcasecmp.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/path.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/strlcpy.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/strlcat.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/stringinfo.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/pg_get_line.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/logging.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/sprompt.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/fe_memutils.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/wchar.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/wait_error.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/username.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/string.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/psprintf.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/kwlookup.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/keywords.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/exec.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/encnames.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/fe_utils/string_utils.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/fe_utils/psqlscan.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/fe_utils/print.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/fe_utils/mbprint.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/fe_utils/conditional.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/fe_utils/cancel.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/variables.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/tab-complete.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/stringutils.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/startup.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/sql_help.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/psqlscanslash.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/prompt.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/mainloop.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/large_obj.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/input.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/help.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/describe.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/crosstabview.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/copy.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/common.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/bin/psql/command.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/thread_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/strerror_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/snprintf_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/pgstrcasecmp_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/pg_strong_random_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/noblock_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/inet_net_ntop_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/chklocale_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/strlcpy_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/port/getpeereid_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/sha2_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/sha1_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/md5_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/hmac_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/cryptohash_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/wchar_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/unicode_norm_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/string_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/scram-common_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/saslprep_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/md5_common_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/link-canary_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/ip_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/encnames_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/common/base64_shlib.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/fe-auth.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/pqexpbuffer.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/libpq-events.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/legacy-pqsignal.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/fe-trace.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/fe-secure.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/fe-protocol3.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/fe-print.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/fe-misc.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/fe-lobj.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/fe-exec.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/fe-connect.gcda:Skip
profiling:/home/beginnerc/work:Cannot create directory
profiling:/home/beginnerc/work/project/postgresql-15.3/src/interfaces/libpq/fe-auth-scram.gcda:Skip
_mcleanup: gmon.out: 权限不够