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glibc/debug
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Joseph Myers 99d6791899 Fix pcprofiledump cross-endian condition (bug 22086). 
debug/pcprofiledump.c contains code that tries to handle other-endian
data.  This uses a condition "(word & 0xfffffff0) == bswap_32
(0xdeb00000)".  This condition is always false (the LHS always has the
low four bits zero, the RHS doesn't); a correct comparison would use
0x0fffffff.  This results in -Werror=tautological-compare build
failures with the tile version of bits/byteswap.h and mainline GCC.

https://sourceware.org/ml/libc-testresults/2017-q3/msg00400.html

pcprofiledump.c: In function 'main':
pcprofiledump.c:118:39: error: bitwise comparison always evaluates to false
[-Werror=tautological-compare]
   int must_swap = (word & 0xfffffff0) == bswap_32 (0xdeb00000);
                                       ^~

This patch fixes the condition.  Tested for x86_64, and with
build-many-glibcs.py that it fixes the build for tilegx-linux-gnu.
(Note that I have not tested the actual pcprofiledump functionality,
native or cross endian, which lacks any testsuite coverage.)

	[BZ #22086]
	* debug/pcprofiledump.c (main): Use byte-swapped mask when
	comparing word with byte-swapped constant.
2017-09-05 15:14:09 +00:00
..
asprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
backtrace-tst.c Add #include <stdint.h> for uint[32|64]_t usage (except installed headers). 2013-05-16 11:32:54 -05:00
backtrace.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
backtracesyms.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
backtracesymsfd.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
catchsegv.sh Update copyright dates not handled by scripts/update-copyrights. 2017-01-01 00:26:24 +00:00
chk_fail.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
confstr_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Depend
dprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
execinfo.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
explicit_bzero_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fdelt_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fgets_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fgets_u_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fgetws_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fgetws_u_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fortify_fail.c __fortify_fail: Remove internal_function attribute 2017-08-13 21:10:44 +02:00
fprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fread_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
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fwprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getcwd_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getdomainname_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getgroups_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gethostname_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gets_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getwd_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
longjmp_chk.c Move ____longjmp_chk prototype to include/setjmp.h 2017-08-20 06:30:46 -07:00
Makefile Don't add stack_chk_fail_local.o to libc.a [BZ #21740] 2017-07-19 08:21:46 -07:00
mbsnrtowcs_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
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mbstowcs_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memcpy_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memmove_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
mempcpy_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memset_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
noophooks.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
obprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
pcprofile.c Narrowing the visibility of libc-internal.h even further. 2017-03-01 20:33:46 -05:00
pcprofiledump.c Fix pcprofiledump cross-endian condition (bug 22086). 2017-09-05 15:14:09 +00:00
poll_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ppoll_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
pread64_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
pread_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
printf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
read_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
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readonly-area.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
realpath_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
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recvfrom_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
segfault.c Fix struct sigaltstack namespace (bug 21517). 2017-06-05 10:17:46 +00:00
snprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stack_chk_fail_local.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stack_chk_fail.c Avoid backtrace from __stack_chk_fail [BZ #12189] 2017-07-11 07:44:14 -07:00
stpcpy_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stpncpy_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcat_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcpy_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strncat_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strncpy_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
swprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-stpcpy_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-strcpy_chk.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-backtrace2.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-backtrace3.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
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tst-backtrace.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-chk1.c Clean up conditionals for declaration of gets. 2017-02-25 09:47:51 -05:00
tst-chk2.c
tst-chk3.c
tst-chk4.cc
tst-chk5.cc
tst-chk6.cc
tst-lfschk1.c
tst-lfschk2.c
tst-lfschk3.c
tst-lfschk4.cc
tst-lfschk5.cc
tst-lfschk6.cc
tst-longjmp_chk2.c test-skeleton.c: Add write_message function 2016-06-23 11:00:36 +02:00
tst-longjmp_chk3.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-longjmp_chk.c tests: unify fortification handler logic 2014-02-08 06:58:43 -05:00
tst-ssp-1.c Avoid backtrace from __stack_chk_fail [BZ #12189] 2017-07-11 07:44:14 -07:00
ttyname_r_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vasprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vdprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Versions New string function explicit_bzero (from OpenBSD). 2016-12-16 16:21:54 -05:00
vfprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vfwprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vsnprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vsprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vswprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vwprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
warning-nop.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wcpcpy_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
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wmemmove_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wmempcpy_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wmemset_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wprintf_chk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
xtrace.sh Update copyright dates not handled by scripts/update-copyrights. 2017-01-01 00:26:24 +00:00