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authorJoseph Myers <joseph@codesourcery.com>2018-02-21 18:02:24 +0000
committerJoseph Myers <joseph@codesourcery.com>2018-02-21 18:02:24 +0000
commit039c721a30392790be50dba53b4c72dbcd65be67 (patch)
treea8be73b53e7fce5e920e40bd2ac212719441f614 /include
parent30ac923dbe7d0c16df8a368150ecd736557508f4 (diff)
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Fix -Os putc_unlocked, fputc_unlocked linknamespace, localplt issues (bug 15105, bug 19463).
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 putc_unlocked and fputc_unlocked.

libc_hidden_* are used for both functions, while namespace issues are
addressed by making putc_unlocked a weak alias of hidden
__putc_unlocked, which is called in the one place where namespace
issues arise (and defined as an inline function in include/stdio.h).

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).  This completes fixing the -Os
linknamespace failures (at least for x86_64); localplt failures remain
after this patch.

2018-02-19  Joseph Myers  <joseph@codesourcery.com>

	[BZ #15105]
	[BZ #19463]
	* libio/fputc_u.c (fputc_unlocked): Use libc_hidden_def.
	* libio/putc_u.c (putc_unlocked): Rename to __putc_unlocked and
	define as weak alias of __putc_unlocked.  Use libc_hidden_weak.
	* include/stdio.h [!_ISOMAC] (fputc_unlocked): Use
	libc_hidden_proto.
	[!_ISOMAC] (putc_unlocked): Likewise.
	[!_ISOMAC] (__putc_unlocked): Declare as hidden function, and
	define inline if [__USE_EXTERN_INLINES].
	* misc/syslog.c (__vsyslog_chk): Call __putc_unlocked instead of
	putc_unlocked.
Diffstat (limited to 'include')
-rw-r--r--include/stdio.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/stdio.h b/include/stdio.h
index 937235f59a..aac5acdb2f 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -188,6 +188,9 @@ 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 (fputc_unlocked)
+libc_hidden_proto (putc_unlocked)
+extern __typeof (putc_unlocked) __putc_unlocked attribute_hidden;
 libc_hidden_proto (fmemopen)
 /* The prototype needs repeating instead of using __typeof to use
    __THROW in C++ tests.  */
@@ -226,6 +229,12 @@ __getc_unlocked (FILE *__fp)
 {
   return __getc_unlocked_body (__fp);
 }
+
+__extern_inline int
+__putc_unlocked (int __c, FILE *__stream)
+{
+  return __putc_unlocked_body (__c, __stream);
+}
 #  endif
 
 # endif /* not _ISOMAC */