about summary refs log tree commit diff
path: root/string
Commit message (Collapse)AuthorAgeFilesLines
* string: Fix tester build with fortify enable with gcc < 12Mahesh Bodapati2023-08-181-3/+8
| | | | | | | | | When building with fortify enabled, GCC < 12 issues a warning on the fortify strncat wrapper might overflow the destination buffer (the failure is tied to -Werror). Checked on ppc64 and x86_64. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* string: Fix tester build with fortify enable with gcc 6Adhemerval Zanella Netto2023-07-261-0/+9
| | | | | | | | | | | When building with fortify enabled, GCC 6 issues an warning the fortify wrapper might overflow the destination buffer. However, GCC does not provide a specific flag to disable the warning (the failure is tied to -Werror). So to avoid disable all errors, only enable the check for GCC 7 or newer. Checked on i686-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* string: Fix tester with fortify enabledAdhemerval Zanella Netto2023-07-241-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | If fortify is enabled, the truncated output warning is issued by the wrapper itself: In function ‘strncpy’, inlined from ‘test_strncpy’ at tester.c:505:10: ../string/bits/string_fortified.h:95:10: error: ‘__builtin_strncpy’ destination unchanged after copying no bytes from a string of length 3 [-Werror=stringop-truncation] 95 | return __builtin___strncpy_chk (__dest, __src, __len, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 96 | __glibc_objsize (__dest)); | ~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../include/bits/string_fortified.h:1, from ../string/string.h:548, from ../include/string.h:60, from tester.c:33, from inl-tester.c:6: In function ‘strncpy’, inlined from ‘test_strncpy’ at tester.c:505:10: Checked on x86_64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* string: Fix bug-strncat1 with fortify enabledAdhemerval Zanella Netto2023-07-241-6/+8
| | | | | | | | | | | | | | If fortify is enabled, the truncated output warning is issued by the wrapper itself: bug-strncat1.c: In function ‘main’: bug-strncat1.c:14:3: error: ‘__builtin___strncat_chk’ output truncated copying 1 byte from a string of length 2 [-Werror=stringop-truncation] 14 | strncat (d, "\5\6", 1); | ^ Checked on x86_64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Exclude routines from fortificationFrédéric Bérat2023-07-051-0/+17
| | | | | | | | | | | | | | | | | Since the _FORTIFY_SOURCE feature uses some routines of Glibc, they need to be excluded from the fortification. On top of that: - some tests explicitly verify that some level of fortification works appropriately, we therefore shouldn't modify the level set for them. - some objects need to be build with optimization disabled, which prevents _FORTIFY_SOURCE to be used for them. Assembler files that implement architecture specific versions of the fortified routines were not excluded from _FORTIFY_SOURCE as there is no C header included that would impact their behavior. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* string: strerror must not return NULL (bug 30555) fw/bug30555Florian Weimer2023-06-153-4/+87
| | | | | | | | | For strerror, this fixes commit 28aff047818eb1726394296d27b ("string: Implement strerror in terms of strerror_l"). This commit avoids returning NULL for strerror_l as well, although POSIX allows this behavior for strerror_l. Reviewed-by: Arjun Shankar <arjun@redhat.com>
* Implement strlcpy and strlcat [BZ #178]Florian Weimer2023-06-148-0/+314
| | | | | | | | | | | These functions are about to be added to POSIX, under Austin Group issue 986. The fortified strlcat implementation does not raise SIGABRT if the destination buffer does not contain a null terminator, it just inherits the non-failing regular strlcat behavior. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Fix all the remaining misspellings -- BZ 25337Paul Pluzhnikov2023-06-029-9/+9
|
* string: Add tests for strndup (BZ #30266)Joe Simmons-Talbott2023-04-212-0/+201
| | | | | | | | | Copy strncpy tests for strndup. Covers some basic testcases with random strings. Remove tests that set the destination's bytes and checked the resulting buffer's bytes. Remove wide character test support since wcsndup() doesn't exist. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* string: Add tests for strdup (BZ #30266)Joe Simmons-Talbott2023-04-212-0/+202
| | | | | | | Copy strcpy tests for strdup. Covers some basic testcases with random strings. Add a zero-length string testcase. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* string: Allow use of test-string.h for non-ifunc implementations.Joe Simmons-Talbott2023-04-211-2/+2
| | | | | | | Mark two variables as unused to silence warning when using test-string.h for non-ifunc implementations. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* <string.h>: Make strchrnul, strcasestr, memmem available by defaultFlorian Weimer2023-04-061-3/+3
| | | | | | | FreeBSD makes them available by default, too, so there does not seem to be a reason to restrict these functions to _GNU_SOURCE. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Fix stringop-overflow warning in test-strncat.Stefan Liebler2023-03-021-0/+1
| | | | | | | | | | | | | | | | | | | | | | Starting with commit b2c474f8de4c92bfe7435853a96805ec32d68dfa "x86: Fix strncat-avx2.S reading past length [BZ #30065]" Building on s390 the test fails due warnings like: In function ‘do_one_test’, inlined from ‘do_overflow_tests’ at test-strncat.c:175:7: test-strncat.c:31:18: error: ‘strnlen’ specified bound [4294966546, 4294967295] exceeds maximum object size 2147483647 [-Werror=stringop-overflow=] 31 | # define STRNLEN strnlen | ^ test-strncat.c:83:16: note: in expansion of macro ‘STRNLEN’ 83 | size_t len = STRNLEN (src, n); | ^~~~~~~ In all werror cases, the call to strnlen (.., SIZE_MAX) is inlined. Therefore this patch just marks the do_one_test function as noinline. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
* string: Disable stack protector in early static initializationAdhemerval Zanella2023-02-081-0/+2
| | | | | | | For powerpc, strncmp is used on _dl_string_platform issued by __tcb_parse_hwcap_and_convert_at_platform. Reviewed-by: Carlos Eduardo Seo <carlos.seo@linaro.org>
* string: Add libc_hidden_proto for memrchrAdhemerval Zanella2023-02-081-0/+1
| | | | | | | Although static linker can optimize it to local call, it follows the internal scheme to provide hidden proto and definitions. Reviewed-by: Carlos Eduardo Seo <carlos.seo@linaro.org>
* string: Add libc_hidden_proto for strchrnulAdhemerval Zanella2023-02-081-0/+1
| | | | | | | Although static linker can optimize it to local call, it follows the internal scheme to provide hidden proto and definitions. Reviewed-by: Carlos Eduardo Seo <carlos.seo@linaro.org>
* string: Hook up the default implementation on test-strrchrAdhemerval Zanella2023-02-061-14/+24
| | | | | | And remove SIMPLE_STRRCHR, which is not used anywhere. Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Hook up the default implementation on test-memrchrAdhemerval Zanella2023-02-061-0/+7
| | | | Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Hook up the default implementation on test-memchrAdhemerval Zanella2023-02-061-11/+20
| | | | | | And remove SIMPLE_MEMCHR, which is not used anywhere. Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Hook up the default implementation on test-strcpyAdhemerval Zanella2023-02-061-10/+24
| | | | Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Hook up the default implementation on test-stpcpyAdhemerval Zanella2023-02-061-11/+21
| | | | Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Hook up the default implementation on test-strncmpAdhemerval Zanella2023-02-061-0/+16
| | | | Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Hook up the default implementation on test-strcmpAdhemerval Zanella2023-02-061-0/+22
| | | | Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Hook up the default implementation on test-strchrAdhemerval Zanella2023-02-061-15/+38
| | | | | | Also remove the simple_STRCHR, which can be easily replaced. Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Hook up the default implementation on test-strnlenAdhemerval Zanella2023-02-061-11/+24
| | | | | | Also remove the SIMPLE_STRNLEN, which is not used anywhere. Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Hook up the default implementation on test-strlenAdhemerval Zanella2023-02-061-17/+14
| | | | | | | Also remove the simple_STRLEN and builtin_strlen, which are not used anywhere. Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Improve generic strrchr with memrchr and strlenAdhemerval Zanella2023-02-061-17/+1
| | | | | | | | | | | Now that both strlen and memrchr have word vectorized implementation, it should be faster to implement strrchr based on memrchr over the string length instead of calling strchr on a loop. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc-linux-gnu, and powerpc64-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits).
* string: Improve generic memrchrAdhemerval Zanella2023-02-061-157/+39
| | | | | | | | | | | | | | New algorithm read the lastaligned address and mask off the unwanted bytes. The loop now read word-aligned address and check using the has_eq macro. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc-linux-gnu, and powerpc64-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic strnlen with memchrAdhemerval Zanella2023-02-061-132/+5
| | | | | | | | It also cleanups the multiple inclusion by leaving the ifunc implementation to undef the weak_alias and libc_hidden_def. Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic memchrAdhemerval Zanella2023-02-061-125/+51
| | | | | | | | | | | | | | | | | New algorithm read the first aligned address and mask off the unwanted bytes (this strategy is similar to arch-specific implementations used on powerpc, sparc, and sh). The loop now read word-aligned address and check using the has_eq macro. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc-linux-gnu, and powerpc64-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic strcpyAdhemerval Zanella2023-02-061-1/+5
| | | | | | | | | | | | | Now that stpcpy is vectorized based on op_t, it should be better to call it instead of strlen plus memcpy. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64-linux-gnu, and powerpc-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic stpcpyAdhemerval Zanella2023-02-061-6/+86
| | | | | | | | | | | | | | | | | | | | | | | It follows the strategy: - Align the destination on word boundary using byte operations. - If source is also word aligned, read a word per time, check for null (using has_zero from string-fzb.h), and write the remaining bytes. - If source is not word aligned, loop by aligning the source, and merging the result of two reads. Similar to aligned case, check for null with has_zero, and write the remaining bytes if null is found. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64-linux-gnu, and powerpc-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic strncmpAdhemerval Zanella2023-02-061-37/+101
| | | | | | | | | | | | | | | | | | | | | It follows the strategy: - Align the first input to word boundary using byte operations. - If second input is also word aligned, read a word per time, check for null (using has_zero), and check final words using byte operation. - If second input is not word aligned, loop by aligning the source, and merge the result of two reads. Similar to aligned case, check for null with has_zero, and check final words using byte operation. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64-linux-gnu, and powerpc-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* string: Improve generic strcmpAdhemerval Zanella2023-02-061-16/+94
| | | | | | | | | | | | | | | | | | | | | It follows the strategy: - Align the first input to word boundary using byte operations. - If second input is also word aligned, read a word per time, check for null (using has_zero), and check final words using byte operation. - If second input is not word aligned, loop by aligning the source, and merging the result of two reads. Similar to aligned case, check for null with has_zero, and check final words using byte operation. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64-linux-gnu, and powerpc-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic strchrAdhemerval Zanella2023-02-061-156/+8
| | | | | | | | | | | | New algorithm now calls strchrnul. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc-linux-gnu, and powerpc64-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic strchrnulAdhemerval Zanella2023-02-061-133/+22
| | | | | | | | | | | | | | | | | New algorithm read the first aligned address and mask off the unwanted bytes (this strategy is similar to arch-specific implementations used on powerpc, sparc, and sh). The loop now read word-aligned address and check using the has_zero_eq function. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64-linux-gnu, and powerpc-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic strlenAdhemerval Zanella2023-02-061-70/+22
| | | | | | | | | | | | | | | | | New algorithm read the first aligned address and mask off the unwanted bytes (this strategy is similar to arch-specific implementations used on powerpc, sparc, and sh). The loop now read word-aligned address and check using the has_zero macro. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc-linux-gnu, and powercp64-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* Parameterize OP_T_THRES from memcopy.hRichard Henderson2023-02-061-3/+0
| | | | | | | | | | | | It moves OP_T_THRES out of memcopy.h to its own header and adjust each architecture that redefines it. Checked with a build and check with run-built-tests=no for all major Linux ABIs. Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* Parameterize op_t from memcopy.hAdhemerval Zanella2023-02-061-1/+0
| | | | | | | | | | It moves the op_t definition out to an specific header, adds the attribute 'may-alias', and cleanup its duplicated definitions. Checked with a build and check with run-built-tests=no for all major Linux ABIs. Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
* Replace rawmemchr (s, '\0') with strchrWilco Dijkstra2023-02-061-1/+1
| | | | | | | | | Almost all uses of rawmemchr find the end of a string. Since most targets use a generic implementation, replacing it with strchr is better since that is optimized by compilers into strlen (s) + s. Also fix the generic rawmemchr implementation to use a cast to unsigned char in the if statement. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* x86: Fix strncat-avx2.S reading past length [BZ #30065]Noah Goldstein2023-01-311-1/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Occurs when `src` has no null-term. Two cases: 1) Zero-length check is doing: ``` test %rdx, %rdx jl L(zero_len) ``` which doesn't actually check zero (was at some point `decq` and the flag never got updated). The fix is just make the flag `jle` i.e: ``` test %rdx, %rdx jle L(zero_len) ``` 2) Length check in page-cross case checking if we should continue is doing: ``` cmpq %r8, %rdx jb L(page_cross_small) ``` which means we will continue searching for null-term if length ends at the end of a page and there was no null-term in `src`. The fix is to make the flag: ``` cmpq %r8, %rdx jbe L(page_cross_small) ```
* string: Suppress -Wmaybe-unitialized for wordcopy [BZ #19444]Adhemerval Zanella2023-01-121-0/+24
| | | | | | | | | | | | | When compiling with GCC 6+ the sparc build warns that some variables might be used uninitialized. However it does not seem the fact, since the variables are really initialized (and also other targets that use the same code, like powerpc, do not warn about it). So suppress the warning for now. Changes from v1: * Update patch description and the explanation for the suppresion. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Update copyright dates with scripts/update-copyrightsJoseph Myers2023-01-06143-143/+143
|
* string: Add len=0 to {w}memcmp{eq} tests and benchtestsNoah Goldstein2022-11-081-6/+10
| | | | | len=0 is valid and fairly common so should be tested. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* configure: Use -Wno-ignored-attributes if compiler warns about multiple aliasesAdhemerval Zanella2022-11-011-0/+9
| | | | | | | | | clang emits an warning when a double alias redirection is used, to warn the the original symbol will be used even when weak definition is overridden. However, this is a common pattern for weak_alias, where multiple alias are set to same symbol. Reviewed-by: Fangrui Song <maskray@google.com>
* Use uintptr_t in string/tester for pointer alignmentSzabolcs Nagy2022-10-281-6/+7
| | | | | | The code assumed unsigned long can represent pointers. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* String: Improve test coverage for memchrSunil K Pandey2022-10-181-0/+1
| | | | | | This test improves memchr coverage near page boundary. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
* String: Improve test coverage for memchrSunil K Pandey2022-10-101-2/+5
| | | | | | This test improves memchr coverage near page boundary. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
* x86: Fix wcsnlen-avx2 page cross length comparison [BZ #29591]Noah Goldstein2022-09-281-29/+41
| | | | | | | | | | | Previous implementation was adjusting length (rsi) to match bytes (eax), but since there is no bound to length this can cause overflow. Fix is to just convert the byte-count (eax) to length by dividing by sizeof (wchar_t) before the comparison. Full check passes on x86-64 and build succeeds w/ and w/o multiarch.
* Use '%z' instead of '%Z' on printf functionsAdhemerval Zanella Netto2022-09-222-3/+3
| | | | | | | | The Z modifier is a nonstandard synonymn for z (that predates z itself) and compiler might issue an warning for in invalid conversion specifier. Reviewed-by: Florian Weimer <fweimer@redhat.com>
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-05 18:11:16 +0000