[Bug localedata/17617] New: Race condition in localedata tests

["hjl.tools at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17617

            Bug ID: 17617
           Summary: Race condition in localedata tests
           Product: glibc
           Version: 2.21
            Status: NEW
          Severity: normal
          Priority: P2
         Component: localedata
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
                CC: libc-locales at sourceware dot org

When machine is under heavy load, I saw

FAIL: localedata/bug-iconv-trans
FAIL: localedata/tst-mbswcs6
FAIL: localedata/tst-trans
FAIL: localedata/tst-wctype
FAIL: localedata/tst_mbrlen
FAIL: localedata/tst_mbrtowc
FAIL: localedata/tst_mbsrtowcs
FAIL: localedata/tst_mbstowcs
FAIL: localedata/tst_mbtowc
FAIL: localedata/tst_swscanf
FAIL: localedata/tst_wcrtomb
FAIL: localedata/tst_wcsrtombs
FAIL: localedata/tst_wcstombs
FAIL: localedata/tst_wctob
FAIL: localedata/tst_wctomb

localedata/Makefile has

# Dependency for the locale files.  We actually make it depend only on
# one of the files.
$(addprefix $(objpfx),$(CTYPE_FILES)): %: \
  gen-locale.sh $(common-objpfx)locale/localedef Makefile \
  $(addprefix charmaps/,$(CHARMAPS)) $(addprefix locales/,$(LOCALE_SRCS))
        @$(SHELL) gen-locale.sh $(common-objpfx) \
                  '$(built-program-cmd-before-env)' '$(run-program-env)' \
                  '$(built-program-cmd-after-env)' $@; \
        $(evaluate-test)

$(addsuffix .out,$(addprefix $(objpfx),$(tests))): %: \
  $(addprefix $(objpfx),$(CTYPE_FILES))

$(objpfx)sort-test.out: sort-test.sh $(objpfx)collate-test $(objpfx)xfrm-test \
                       $(test-input-data) $(addprefix $(objpfx),$(CTYPE_FILES))
        $(SHELL) $< $(common-objpfx) '$(test-program-prefix-before-env)' \
          '$(run-program-env)' '$(test-program-prefix-after-env)' \
          $(test-input) \
          > $@; \
        $(evaluate-test)

However, there is no $(CTYPE_FILES) dependency for those tests
above, which fail at random under heavy load with parallel build.

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