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authorAlexandre Oliva <aoliva@redhat.com>2014-01-31 23:26:23 -0200
committerAlexandre Oliva <aoliva@redhat.com>2014-01-31 23:26:23 -0200
commitf2d58726287f60179e51797e6132694ca1594ccd (patch)
treeae74a93bc85e5e221948c809dbf91811375b0448 /manual/locale.texi
parent2cc3615ce84dc87e9014e5ab9162448c87ec6f6d (diff)
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* manual/locale.texi: Document MTASC-safety properties.
Diffstat (limited to 'manual/locale.texi')
-rw-r--r--manual/locale.texi146
1 files changed, 146 insertions, 0 deletions
diff --git a/manual/locale.texi b/manual/locale.texi
index a11c7d8..8bfd653 100644
--- a/manual/locale.texi
+++ b/manual/locale.texi
@@ -224,6 +224,136 @@ The symbols in this section are defined in the header file @file{locale.h}.
@comment locale.h
@comment ISO
@deftypefun {char *} setlocale (int @var{category}, const char *@var{locale})
+@safety{@prelim{}@mtunsafe{@mtasuconst{:@mtslocale{}} @mtsenv{}}@asunsafe{@asuinit{} @asulock{} @ascuheap{} @asucorrupt{}}@acunsafe{@acuinit{} @acucorrupt{} @aculock{} @acsmem{} @acsfd{}}}
+@c Uses of the global locale object are unguarded in functions that
+@c ought to be MT-Safe, so we're ruling out the use of this function
+@c once threads are started. It takes a write lock itself, but it may
+@c return a pointer loaded from the global locale object after releasing
+@c the lock, or before taking it.
+@c setlocale @mtasuconst:@mtslocale @mtsenv @asuinit @ascuheap @asulock @asucorrupt @acucorrupt @acsmem @acsfd @aculock
+@c libc_rwlock_wrlock @asulock @aculock
+@c libc_rwlock_unlock @aculock
+@c getenv LOCPATH @mtsenv
+@c malloc @ascuheap @acsmem
+@c free @ascuheap @acsmem
+@c new_composite_name ok
+@c setdata ok
+@c setname ok
+@c _nl_find_locale @mtsenv @asuinit @ascuheap @asulock @asucorrupt @acucorrupt @acsmem @acsfd @aculock
+@c getenv LC_ALL and LANG @mtsenv
+@c _nl_load_locale_from_archive @ascuheap @acucorrupt @acsmem @acsfd
+@c sysconf _SC_PAGE_SIZE ok
+@c _nl_normalize_codeset @ascuheap @acsmem
+@c isalnum_l ok (C locale)
+@c isdigit_l ok (C locale)
+@c malloc @ascuheap @acsmem
+@c tolower_l ok (C locale)
+@c open_not_cancel_2 @acsfd
+@c fxstat64 ok
+@c close_not_cancel_no_status ok
+@c __mmap64 @acsmem
+@c calculate_head_size ok
+@c __munmap ok
+@c compute_hashval ok
+@c qsort dup @acucorrupt
+@c rangecmp ok
+@c malloc @ascuheap @acsmem
+@c strdup @ascuheap @acsmem
+@c _nl_intern_locale_data @ascuheap @acsmem
+@c malloc @ascuheap @acsmem
+@c free @ascuheap @acsmem
+@c _nl_expand_alias @ascuheap @asulock @acsmem @acsfd @aculock
+@c libc_lock_lock @asulock @aculock
+@c bsearch ok
+@c alias_compare ok
+@c strcasecmp ok
+@c read_alias_file @ascuheap @asulock @acsmem @acsfd @aculock
+@c fopen @ascuheap @asulock @acsmem @acsfd @aculock
+@c fsetlocking ok
+@c feof_unlocked ok
+@c fgets_unlocked ok
+@c isspace ok (locale mutex is locked)
+@c extend_alias_table @ascuheap @acsmem
+@c realloc @ascuheap @acsmem
+@c realloc @ascuheap @acsmem
+@c fclose @ascuheap @asulock @acsmem @acsfd @aculock
+@c qsort @ascuheap @acsmem
+@c alias_compare dup
+@c libc_lock_unlock @aculock
+@c _nl_explode_name @ascuheap @acsmem
+@c _nl_find_language ok
+@c _nl_normalize_codeset dup @ascuheap @acsmem
+@c _nl_make_l10nflist @ascuheap @acsmem
+@c malloc @ascuheap @acsmem
+@c free @ascuheap @acsmem
+@c __argz_stringify ok
+@c __argz_count ok
+@c __argz_next ok
+@c _nl_load_locale @ascuheap @acsmem @acsfd
+@c open_not_cancel_2 @acsfd
+@c __fxstat64 ok
+@c close_not_cancel_no_status ok
+@c mmap @acsmem
+@c malloc @ascuheap @acsmem
+@c read_not_cancel ok
+@c free @ascuheap @acsmem
+@c _nl_intern_locale_data dup @ascuheap @acsmem
+@c munmap ok
+@c __gconv_compare_alias @asuinit @ascuheap @asucorrupt @asulock @acsmem@acucorrupt @acsfd @aculock
+@c __gconv_read_conf @asuinit @ascuheap @asucorrupt @asulock @acsmem@acucorrupt @acsfd @aculock
+@c (libc_once-initializes gconv_cache and gconv_path_envvar; they're
+@c never modified afterwards)
+@c __gconv_load_cache @ascuheap @acsmem @acsfd
+@c getenv GCONV_PATH @mtsenv
+@c open_not_cancel @acsfd
+@c __fxstat64 ok
+@c close_not_cancel_no_status ok
+@c mmap @acsmem
+@c malloc @ascuheap @acsmem
+@c __read ok
+@c free @ascuheap @acsmem
+@c munmap ok
+@c __gconv_get_path @asulock @ascuheap @aculock @acsmem @acsfd
+@c getcwd @ascuheap @acsmem @acsfd
+@c libc_lock_lock @asulock @aculock
+@c malloc @ascuheap @acsmem
+@c strtok_r ok
+@c libc_lock_unlock @aculock
+@c read_conf_file @ascuheap @asucorrupt @asulock @acsmem @acucorrupt @acsfd @aculock
+@c fopen @ascuheap @asulock @acsmem @acsfd @aculock
+@c fsetlocking ok
+@c feof_unlocked ok
+@c getdelim @ascuheap @asucorrupt @acsmem @acucorrupt
+@c isspace_l ok (C locale)
+@c add_alias
+@c isspace_l ok (C locale)
+@c toupper_l ok (C locale)
+@c add_alias2 dup @ascuheap @acucorrupt @acsmem
+@c add_module @ascuheap @acsmem
+@c isspace_l ok (C locale)
+@c toupper_l ok (C locale)
+@c strtol ok (@mtslocale but we hold the locale lock)
+@c tfind __gconv_alias_db ok
+@c __gconv_alias_compare dup ok
+@c calloc @ascuheap @acsmem
+@c insert_module dup @ascuheap
+@c __tfind ok (because the tree is read only by then)
+@c __gconv_alias_compare dup ok
+@c insert_module @ascuheap
+@c free @ascuheap
+@c add_alias2 @ascuheap @acucorrupt @acsmem
+@c detect_conflict ok, reads __gconv_modules_db
+@c malloc @ascuheap @acsmem
+@c tsearch __gconv_alias_db @ascuheap @acucorrupt @acsmem [exclusive tree, no @mtsrace]
+@c __gconv_alias_compare ok
+@c free @ascuheap
+@c __gconv_compare_alias_cache ok
+@c find_module_idx ok
+@c do_lookup_alias ok
+@c __tfind ok (because the tree is read only by then)
+@c __gconv_alias_compare ok
+@c strndup @ascuheap @acsmem
+@c strcasecmp_l ok (C locale)
The function @code{setlocale} sets the current locale for category
@var{category} to @var{locale}. A list of all the locales the system
provides can be created by running
@@ -414,6 +544,10 @@ according to the selected locale using this information.
@comment locale.h
@comment ISO
@deftypefun {struct lconv *} localeconv (void)
+@safety{@prelim{}@mtunsafe{@mtasurace{:localeconv} @mtslocale{}}@asunsafe{}@acsafe{}}
+@c This function reads from multiple components of the locale object,
+@c without synchronization, while writing to the static buffer it uses
+@c as the return value.
The @code{localeconv} function returns a pointer to a structure whose
components contain information about how numeric and monetary values
should be formatted in the current locale.
@@ -680,6 +814,9 @@ was introduced.
@comment langinfo.h
@comment XOPEN
@deftypefun {char *} nl_langinfo (nl_item @var{item})
+@safety{@prelim{}@mtsafe{@mtslocale{}}@assafe{}@acsafe{}}
+@c It calls _nl_langinfo_l with the current locale, which returns a
+@c pointer into constant strings defined in locale data structures.
The @code{nl_langinfo} function can be used to access individual
elements of the locale categories. Unlike the @code{localeconv}
function, which returns all the information, @code{nl_langinfo}
@@ -974,6 +1111,11 @@ locale information, making it easier for the user to format
numbers according to these rules.
@deftypefun ssize_t strfmon (char *@var{s}, size_t @var{maxsize}, const char *@var{format}, @dots{})
+@safety{@prelim{}@mtsafe{@mtslocale{}}@asunsafe{@ascuheap{}}@acunsafe{@acsmem{}}}
+@c It (and strfmon_l) both call vstrfmon_l, which, besides accessing the
+@c locale object passed to it, accesses the active locale through
+@c isdigit (but to_digit assumes ASCII digits only). It may call
+@c __printf_fp (@mtslocale @ascuheap @acsmem) and guess_grouping (safe).
The @code{strfmon} function is similar to the @code{strftime} function
in that it takes a buffer, its size, a format string,
and values to write into the buffer as text in a form specified
@@ -1185,6 +1327,10 @@ access to the corresponding locale definitions.
@comment GNU
@comment stdlib.h
@deftypefun int rpmatch (const char *@var{response})
+@safety{@prelim{}@mtsafe{@mtslocale{}}@asunsafe{@asucorrupt{} @ascuheap{} @asulock{} @ascudlopen{}}@acunsafe{@acucorrupt{} @aculock{} @acsmem{} @acsfd{}}}
+@c Calls nl_langinfo with YESEXPR and NOEXPR, triggering @mtslocale but
+@c it's regcomp and regexec that bring in all of the safety issues.
+@c regfree is also called, but it doesn't introduce any further issues.
The function @code{rpmatch} checks the string in @var{response} whether
or not it is a correct yes-or-no answer and if yes, which one. The
check uses the @code{YESEXPR} and @code{NOEXPR} data in the