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Fix -Os getc_unlocked linknamespace, localplt issues (bug 15105, bug 19463).

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Continuing the fixes for linknamespace and localplt test failures with
-Os that arise from functions not being inlined in that case, this
patch fixes such failures for getc_unlocked.

__getc_unlocked already exists; this patch makes it explicitly hidden,
calls it where needed for namespace reasons, adds an inline function
for it when inline functions are used and adds libc_hidden_proto /
libc_hidden_weak for getc_unlocked.

Tested for x86_64 (both without -Os to make sure that case continues
to work, and with -Os to make sure all the relevant linknamespace and
localplt test failures are resolved).  Because of other such failures
that remain after this patch, neither of the bugs can yet be closed.

	[BZ #15105]
	[BZ #19463]
	* libio/getc_u.c (getc_unlocked): Use libc_hidden_weak.
	* include/stdio.h [!_ISOMAC] (__getc_unlocked): Use
	attribute_hidden, and define inline if [__USE_EXTERN_INLINES].
	[!_ISOMAC] (getc_unlocked): Use libc_hidden_proto.
	* misc/getttyent.c (__getttyent): Call __getc_unlocked instead of
	getc_unlocked.
	* time/tzfile.c (__tzfile_read): Likewise.
This commit is contained in:
Joseph Myers 2018-02-21 18:01:11 +00:00
parent 7ec5f9465e
commit 30ac923dbe
5 changed files with 28 additions and 8 deletions
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12
ChangeLog
View File

@ -1,3 +1,15 @@
2018-02-21 Joseph Myers <joseph@codesourcery.com>
[BZ #15105]
[BZ #19463]
* libio/getc_u.c (getc_unlocked): Use libc_hidden_weak.
* include/stdio.h [!_ISOMAC] (__getc_unlocked): Use
attribute_hidden, and define inline if [__USE_EXTERN_INLINES].
[!_ISOMAC] (getc_unlocked): Use libc_hidden_proto.
* misc/getttyent.c (__getttyent): Call __getc_unlocked instead of
getc_unlocked.
* time/tzfile.c (__tzfile_read): Likewise.
2018-02-21 Mike FABIAN <mfabian@redhat.com>
[BZ #22517]

9
include/stdio.h
View File

@ -119,7 +119,7 @@ extern void __funlockfile (FILE *__stream) attribute_hidden;
possible. */
extern int __ftrylockfile (FILE *__stream);
extern int __getc_unlocked (FILE *__fp);
extern int __getc_unlocked (FILE *__fp) attribute_hidden;
extern wint_t __getwc_unlocked (FILE *__fp);
extern int __fxprintf (FILE *__fp, const char *__fmt, ...)
@ -187,6 +187,7 @@ libc_hidden_proto (feof_unlocked)
extern __typeof (feof_unlocked) __feof_unlocked attribute_hidden;
libc_hidden_proto (ferror_unlocked)
extern __typeof (ferror_unlocked) __ferror_unlocked attribute_hidden;
libc_hidden_proto (getc_unlocked)
libc_hidden_proto (fmemopen)
/* The prototype needs repeating instead of using __typeof to use
__THROW in C++ tests. */
@ -219,6 +220,12 @@ __NTH (__ferror_unlocked (FILE *__stream))
{
return __ferror_unlocked_body (__stream);
}
__extern_inline int
__getc_unlocked (FILE *__fp)
{
return __getc_unlocked_body (__fp);
}
# endif
# endif /* not _ISOMAC */

1
libio/getc_u.c
View File

@ -37,4 +37,5 @@ __getc_unlocked (FILE *fp)
}
weak_alias (__getc_unlocked, getc_unlocked)
libc_hidden_weak (getc_unlocked)
weak_alias (__getc_unlocked, fgetc_unlocked)

2
misc/getttyent.c
View File

@ -79,7 +79,7 @@ __getttyent (void)
}
/* skip lines that are too big */
if (!strchr (p, '\n')) {
while ((c = getc_unlocked(tf)) != '\n' && c != EOF)
while ((c = __getc_unlocked(tf)) != '\n' && c != EOF)
;
continue;
}

12
time/tzfile.c
View File

@ -343,11 +343,11 @@ __tzfile_read (const char *file, size_t extra, char **extrap)
sizeof (x), f) != sizeof (x),
0))
goto lose;
c = getc_unlocked (f);
c = __getc_unlocked (f);
if (__glibc_unlikely ((unsigned int) c > 1u))
goto lose;
types[i].isdst = c;
c = getc_unlocked (f);
c = __getc_unlocked (f);
if (__glibc_unlikely ((size_t) c > chars))
/* Bogus index in data file. */
goto lose;
@ -376,7 +376,7 @@ __tzfile_read (const char *file, size_t extra, char **extrap)
for (i = 0; i < num_isstd; ++i)
{
int c = getc_unlocked (f);
int c = __getc_unlocked (f);
if (__glibc_unlikely (c == EOF))
goto lose;
types[i].isstd = c != 0;
@ -386,7 +386,7 @@ __tzfile_read (const char *file, size_t extra, char **extrap)
for (i = 0; i < num_isgmt; ++i)
{
int c = getc_unlocked (f);
int c = __getc_unlocked (f);
if (__glibc_unlikely (c == EOF))
goto lose;
types[i].isgmt = c != 0;
@ -398,7 +398,7 @@ __tzfile_read (const char *file, size_t extra, char **extrap)
if (sizeof (time_t) == 8 && tzspec != NULL)
{
/* Skip over the newline first. */
if (getc_unlocked (f) != '\n'
if (__getc_unlocked (f) != '\n'
|| (__fread_unlocked (tzspec, 1, tzspec_len - 1, f)
!= tzspec_len - 1))
tzspec = NULL;
@ -440,7 +440,7 @@ __tzfile_read (const char *file, size_t extra, char **extrap)
char *tzstr = malloc (tzspec_len);
if (tzstr == NULL)
goto lose;
if (getc_unlocked (f) != '\n'
if (__getc_unlocked (f) != '\n'
|| (__fread_unlocked (tzstr, 1, tzspec_len - 1, f)
!= tzspec_len - 1))
{