From 4e2f43f842ef5e253cc23383645adbaa03cedb86 Mon Sep 17 00:00:00 2001 From: Zack Weinberg Date: Wed, 7 Mar 2018 14:32:03 -0500 Subject: Use PRINTF_FORTIFY instead of _IO_FLAGS2_FORTIFY (bug 11319) The _chk variants of all of the printf functions become much simpler. This is the last thing that we needed _IO_acquire_lock_clear_flags2 for, so it can go as well. I took the opportunity to make the headers included and the names of all local variables consistent across all the affected files. Since we ultimately want to get rid of __no_long_double as well, it must be possible to get all of the nontrivial effects of the _chk functions by calling the _internal functions with appropriate flags. For most of the __(v)xprintf_chk functions, this is covered by PRINTF_FORTIFY plus some up-front argument checks that can be duplicated. However, __(v)sprintf_chk installs a custom jump table so that it can crash instead of overflowing the output buffer. This functionality is moved to __vsprintf_internal, which now has a 'maxlen' argument like __vsnprintf_internal; to get the unsafe behavior of ordinary (v)sprintf, pass -1 for that argument. obstack_printf_chk and obstack_vprintf_chk are no longer in the same file. As a side-effect of the unification of both fortified and non-fortified vdprintf initialization, this patch fixes bug 11319 for __dprintf_chk and __vdprintf_chk, which was previously fixed only for dprintf and vdprintf by the commit commit 7ca890b88e6ab7624afb1742a9fffb37ad5b3fc3 Author: Ulrich Drepper Date: Wed Feb 24 16:07:57 2010 -0800 Fix reporting of I/O errors in *dprintf functions. This patch adds a test case to avoid regressions. Tested for powerpc and powerpc64le. --- debug/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'debug/Makefile') diff --git a/debug/Makefile b/debug/Makefile index 506cebc3c4..2ef08cf23b 100644 --- a/debug/Makefile +++ b/debug/Makefile @@ -45,7 +45,7 @@ routines = backtrace backtracesyms backtracesymsfd noophooks \ gethostname_chk getdomainname_chk wcrtomb_chk mbsnrtowcs_chk \ wcsnrtombs_chk mbsrtowcs_chk wcsrtombs_chk mbstowcs_chk \ wcstombs_chk asprintf_chk vasprintf_chk dprintf_chk \ - vdprintf_chk obprintf_chk \ + vdprintf_chk obprintf_chk vobprintf_chk \ longjmp_chk ____longjmp_chk \ fdelt_chk poll_chk ppoll_chk \ explicit_bzero_chk \ -- cgit v1.2.3