glibc

Commit Graph

Author	SHA1	Message	Date
Florian Weimer	647103ea3a	elf: Enhance ld.so --help to print HWCAP subdirectories Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	10b39a5124	elf: Add library search path information to ld.so --help Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Martin Sebor	c5db00dc30	sunrpc: Adjust RPC function declarations to match Sun's (bug 26686] Building Glibc with the latest GCC 11 shows a number of instances of the new -Warray-parameter warning designed to encourage consistency in the forms of array arguments in redeclarations of the same function (and, ultimately, to enable the detection of out of bounds accesses via such arguments). To avoid the subset of these warnings for the RPC APIs, this patch changes the declarations of these functions to match both their definitions and the Oracle RPC documentation. Besides avoiding the -Warray-parameter warnings the effect of this change is for GCC to issue warnings when either the functions are passed an array with fewer than MAXNETNAMELEN + 1 elements, or when the functions themselves access elements outside the array bounds.	6 years ago
Martin Sebor	3eff7504ca	Avoid GCC 11 -Warray-parameter warnings [BZ #26686 ]. Building Glibc with the latest GCC 11 also shows a couple of instances of the new -Warray-parameter warning in the thread db APIs. To avoid these, this patch changes the deefinitions of the two functions to match their definitions.	6 years ago
Florian Weimer	50b1b7a390	elf: Make __rtld_env_path_list and __rtld_search_dirs global variables They have been renamed from env_path_list and rtld_search_dirs to avoid linknamespace issues. This change will allow future use these variables in diagnostics. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	db03874df9	elf: Print the full name of the dynamic loader in the ld.so help message This requires defining a macro for the full path, matching the -Wl,--dynamic-link= arguments used for linking glibc programs, and ldd script. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	ca52c56abf	elf: Use the term "program interpreter" in the ld.so help message This is the term that the ELF standard itself uses. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	1a945ba5ad	scripts/update-copyrights: Update csu/version.c, elf/dl-usage.c Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	542923d949	elf: Implement ld.so --version This prints out version information for the dynamic loader and exits immediately, without further command line processing (which seems to match what some GNU tools do). Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Adhemerval Zanella	addff78f1f	nptl: Add missing cancellation flags on lockf It also removes CFLAGS-lockf.c duplicate rule. It fixes nptl/tst-cancelx16 on mips64-linux-gnu.	6 years ago
Adhemerval Zanella	ebcff89a98	Update mips64 libm-test-ulps	6 years ago
Adhemerval Zanella	601f40d37b	Update alpha libm-test-ulps	6 years ago
Florian Weimer	e0f1a58f3d	elf: Implement ld.so --help --help processing is deferred to the point where the executable has been loaded, so that it is possible to eventually include information from the main executable in the help output. As suggested in the GNU command-line interface guidelines, the help message is printed to standard output, and the exit status is successful. Handle usage errors closer to the GNU command-line interface guidelines. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	27316f4a23	elf: Record whether paths come from LD_LIBRARY_PATH or --library-path This allows more precise LD_DEBUG diagnostics. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	9590a71adc	elf: Move ld.so error/help output to _dl_usage Also add a comment to elf/Makefile, explaining why we cannot use config.status for autoconf template processing. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	2bf9e641fd	elf: Extract command-line/environment variables state from rtld.c Introduce struct dl_main_state and move it to <dl-main.h>. Rename enum mode to enum rtld_mode and add the rtld_mode_ prefix to the enum constants. This avoids the need for putting state that is only needed during startup into the ld.so data segment.	6 years ago
Florian Weimer	72d36ffd7d	elf: Implement __rtld_malloc_is_complete In some cases, it is difficult to determine the kind of malloc based on the execution context, so a function to determine that is helpful. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Andreas Schwab	c0e9ddf59e	__vfscanf_internal: fix aliasing violation (bug 26690) As noted in <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97264>, the cast in the call to the read_int function is an aliasing violation. Change the type of local variable f to a pointer to unsigned, which allows to eliminate most casts while only adding three new ones.	6 years ago
Andreas Schwab	8f8052c2aa	Revert "Fix missing redirects in testsuite targets" This reverts commit `d5afb38503`. The log files are actually created by the various shell scripts that drive the tests.	6 years ago
Adhemerval Zanella	a04689ee7a	nptl: Add missing cancellation flags on futex_internal and pselect32 It fixes the tst-cancelx{4,5} and tst-cancel24-{static} regression on some platforms (arm and sparc32). Checked on arm-linux-gnueabihf and sparcv9-linux-gnu.	6 years ago
Florian Weimer	b31d4355ae	elf: Implement _dl_write The generic version is parallel to _dl_writev. It cannot use _dl_writev directly because the errno value needs to be obtained under a lock. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	56f8d44294	elf: Do not search HWCAP subdirectories in statically linked binaries This functionality does not seem to be useful since static dlopen is mostly used for iconv/character set conversion and NSS support. gconv modules are loaded with full paths anyway, so that the HWCAP subdirectory logic does not apply. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	27fe5f2e67	Linux: Require properly configured /dev/pts for PTYs Current systems do not have BSD terminals, so the fallback code in posix_openpt/getpt does not do anything. Also remove the file system check for /dev/pts. Current systems always have a devpts file system mounted there if /dev/ptmx exists. grantpt is now essentially a no-op. It only verifies that the argument is a ptmx-descriptor. Therefore, this change indirectly addresses bug 24941. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	0f9793a556	Linux: unlockpt needs to fail with EINVAL, not ENOTTY (bug 26053) The EINVAL error code is mandated by POSIX and documented in the manual. Also clean up the unlockpt implementation a bit, assuming that TIOCSPTLCK is always defined. Enhance login/tst-grantpt to cover unlockpt corner cases. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Florian Weimer	c42b7058a2	login/tst-grantpt: Convert to support framework, more error checking The test now requires working /dev/pts pseudo-terminals. A new subtest (test_not_ptmx) attempts to call grantpt on a pseudo-terminal that is not a ptmx device. POSIX requires an EINVAL error in this case. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Adhemerval Zanella	7a887dd537	posix: Fix -Warray-bounds instances building timer_create [BZ #26687 ] GCC 11 -Warray-bounds triggers invalid warnings when building Linux timer_create.c: ../sysdeps/unix/sysv/linux/timer_create.c: In function '__timer_create_new': ../sysdeps/unix/sysv/linux/timer_create.c:83:17: warning: array subscript 'struct timer[0]' is partly outside array bounds of 'unsigned char[8]' [-Warray-bounds] 83 \| newp->sigev_notify = (evp != NULL \| ^~ ../sysdeps/unix/sysv/linux/timer_create.c:59:47: note: referencing an object of size 8 allocated by 'malloc' 59 \| struct timer newp = (struct timer ) malloc (offsetof (struct timer, \| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 60 \| thrfunc)); \| ~~~~~~~~~ The struct allocated for !SIGEV_THREAD timers only requires two 'int' fields (sigev_notify and ktimerid) and the offsetof trick tries minimize the memory usage by only allocation the required size. However, although the resulting size is suffice for !SIGEV_THREAD time, accessing the partially allocated object is error-prone and UB. This patch fixes both issues by embedding the information whether the timer if a SIGEV_THREAD in the returned 'timer_t'. For !SIGEV_THREAD, the resulting 'timer_t' is the returned kernel timer identifer (kernel_timer_t), while for SIGEV_THREAD it uses the fact malloc returns at least _Alignof (max_align_t) pointers plus that valid kernel_timer_t are always positive to set MSB bit of the returned 'timer_t' to indicate the timer handles a SIGEV_THREAD. It allows to remove the memory allocation for !SIGEV_THREAD and also remove the 'sigev_notify' field from 'struct timer'. Checked on x86_64-linux-gnu and i686-linux-gnu.	6 years ago
H.J. Lu	862897d2ad	Replace Minumum/minumum with Minimum/minimum Replace Minumum/minumum in comments with Minimum/minimum.	6 years ago
DJ Delorie	78e09591a5	Optimize scripts/merge-test-results.sh The inner loop is called thousands of times per "make check" even if there's otherwise nothing to do. Avoid calling /bin/head all those times when a builtin will do. Reviewed-by: Carlos O'Donell <carlos@redhat.com>	6 years ago
Joseph Myers	19302b27bd	Fix GCC 11 -Warray-parameter warning for __sigsetjmp (bug 26647) This patch fixes part of bug 26647 (-Werror=array-parameter error building with GCC 11 because of __sigsetjmp being declared using an array parameter in one header and a pointer parameter in another). The fix is to split the struct __jmp_buf_tag definition out to a separate bits/types/ header so it can be included in pthread.h, so that pthread.h can declare __sigsetjmp with the type contents visible, so can use an array (as in setjmp.h) rather than a pointer in the declaration. Note that several other build failures with GCC 11 remain. This does not fix the jmp_buf-related -Wstringop-overflow errors (also discussed in bug 26647), or -Warray-parameter errors for other functions (bug 26686), or -Warray-bounds errors (bug 26687). Tested, with older compilers, natively for x86_64 and with build-many-glibc.py for aarch64-linux-gnu. Tested with build-many-glibcs.py with GCC mainline for aarch64-linux-gnu that this gets past the -Warray-parameter issue for __sigsetjmp (with the next build failure being the other one discussed in bug 26647).	6 years ago
Jonathan Wakely	5bb2e5300b	manual: Fix typo	6 years ago
Lukasz Majewski	3102e28bd1	y2038: nptl: Convert pthread_rwlock_{clock\|timed}{rd\|wr}lock to support 64 bit time The pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock, pthread_rwlock_timedrdlock and pthread_rwlock_timedwrlock have been converted to support 64 bit time. This change uses new futex_abstimed_wait64 function in ./sysdeps/nptl/futex-helpers.c, which uses futex_time64 where possible. The pthread_rwlock_{clock\|timed}{rd\|wr}lock only accepts absolute time. Moreover, there is no need to check for NULL passed as *abstime pointer to the syscalls as those calls have exported symbols marked with __nonull attribute for abstime. For systems with __TIMESIZE != 64 && __WORDSIZE == 32: - Conversions between 64 bit time to 32 bit are necessary - Redirection to pthread_rwlock_{clock\|timed}{rd\|wr}lock will provide support for 64 bit time Build tests: ./src/scripts/build-many-glibcs.py glibcs Run-time tests: - Run specific tests on ARM/x86 32bit systems (qemu): https://github.com/lmajewski/meta-y2038 and run tests: https://github.com/lmajewski/y2038-tests/commits/master Above tests were performed with Y2038 redirection applied as well as without to test the proper usage of both __pthread_rwlock_{clock\|timed}{rd\|wr}lock64 and __pthread_rwlock_{clock\|timed}{rd\|wr}lock. Reviewed-by: Alistair Francis <alistair.francis@wdc.com>	6 years ago
Lukasz Majewski	b2cdadde4d	Y2038: nptl: Provide futex_abstimed_wait64 supporting 64 bit time This is the helper function, which uses struct __timespec64 to provide 64 bit absolute time to futex syscalls. The aim of this function is to move convoluted pre-processor macro code from sysdeps/nptl/lowlevellock-futex.h to C function in futex-internal.c The futex_abstimed_wait64 function has been put into a separate file on the purpose - to avoid issues apparent on the m68k architecture related to small number of available registers (there is not enough registers to put all necessary arguments in them if the above function would be added to futex-internal.h with __always_inline attribute). Reviewed-by: Alistair Francis <alistair.francis@wdc.com>	6 years ago
Adhemerval Zanella	be9b0b9a01	sysvipc: Return EINVAL for invalid msgctl commands It avoids regressions on possible future commands that might require additional libc support. The downside is new commands added by newer kernels will need further glibc support. Checked on x86_64-linux-gnu and i686-linux-gnu (Linux v4.15 and v5.4).	6 years ago
Adhemerval Zanella	20a00dbefc	sysvipc: Fix IPC_INFO and MSG_INFO handling [BZ #26639 ] Both commands are Linux extensions where the third argument is a 'struct msginfo' instead of 'struct msqid_ds' and its information does not contain any time related fields (so there is no need to extra conversion for __IPC_TIME64. The regression testcase checks for Linux specifix SysV ipc message control extension. For IPC_INFO/MSG_INFO it tries to match the values against the tunable /proc values and for MSG_STAT/MSG_STAT_ANY it check if the create message queue is within the global list returned by the kernel. Checked on x86_64-linux-gnu and on i686-linux-gnu (Linux v5.4 and on Linux v4.15).	6 years ago
Adhemerval Zanella	a16d2abd49	sysvipc: Return EINVAL for invalid semctl commands It avoids regressions on possible future commands that might require additional libc support. The downside is new commands added by newer kernels will need further glibc support. Checked on x86_64-linux-gnu and i686-linux-gnu (Linux v4.15 and v5.4).	6 years ago
Dmitry V. Levin	574500a108	sysvipc: Fix SEM_STAT_ANY kernel argument pass [BZ #26637 ] Handle SEM_STAT_ANY the same way as SEM_STAT so that the buffer argument of SEM_STAT_ANY is properly passed to the kernel and back. The regression testcase checks for Linux specifix SysV ipc message control extension. For IPC_INFO/SEM_INFO it tries to match the values against the tunable /proc values and for SEM_STAT/SEM_STAT_ANY it check if the create message queue is within the global list returned by the kernel. Checked on x86_64-linux-gnu and on i686-linux-gnu (Linux v5.4 and on Linux v4.15). Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Szabolcs Nagy	238032ead6	aarch64: enforce >=64K guard size [BZ #26691 ] There are several compiler implementations that allow large stack allocations to jump over the guard page at the end of the stack and corrupt memory beyond that. See CVE-2017-1000364. Compilers can emit code to probe the stack such that the guard page cannot be skipped, but on aarch64 the probe interval is 64K by default instead of the minimum supported page size (4K). This patch enforces at least 64K guard on aarch64 unless the guard is disabled by setting its size to 0. For backward compatibility reasons the increased guard is not reported, so it is only observable by exhausting the address space or parsing /proc/self/maps on linux. On other targets the patch has no effect. If the stack probe interval is larger than a page size on a target then ARCH_MIN_GUARD_SIZE can be defined to get large enough stack guard on libc allocated stacks. The patch does not affect threads with user allocated stacks. Fixes bug 26691.	8 years ago
Adhemerval Zanella	2deb779390	sysvipc: Fix semtimedop for Linux < 5.1 for 64-bit ABI Both powerpc64 and s390x provides semtimedop through __NR_ipc for pre v5.1 kernel. Neither the y2038 support (`7c437d3778`) nor the attempt to fix an issue for !__ASSUME_DIRECT_SYSVIPC_SYSCALLS (`aaa12e9ff0`) took this in consideration. This patch fixes it by issuing __NR_semtimedop_time64 iff it is defined, otherwise __NR_semtimeop is issued if both __ASSUME_DIRECT_SYSVIPC_SYSCALLS it set and __NR_semtimedop is define, other __NR_ipc is used instead. To summarize: 1. For 32-bit architetures __NR_semtimedop_time64 is always issued. The fallback is used only for !__ASSUME_TIME64_SYSCALLS and it issues either __NR_ipc or __NR_semtimedop. 2. For 64-bit architecture with wire-up SysV syscall (__ASSUME_DIRECT_SYSVIPC_SYSCALLS and __NR_semtimeop defined) __NR_semtimeop is issued. 3. Otherwise __NR_ipc is used instead. Checked on x86_64-linux-gnu, i686-linux-gnu (kernel 4.15 and 5.4), powerpc64le (kernel 4.18), and s390x (kernel 4.12). Reviewed-by: Matheus Castanho <msc@linux.ibm.com>	6 years ago
Lukasz Majewski	e75fbaaa21	nptl: futex: Move __NR_futex_time64 alias to beginning of futex-internal.h This alias macro shall be moved to the beginning of the futex-internal.h to be easily reused by other functions, which would support 64 bit time. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>	6 years ago
Lukasz Majewski	3f9705f1fc	nptl: Provide proper spelling for 32 bit version of futex_abstimed_wait This change provides proper spelling of 32 bit __futex_abstimed_wait_cancelable32 function Reviewed-by: Alistair Francis <alistair.francis@wdc.com>	6 years ago
Adhemerval Zanella	cef95fdc2e	string: Fix strerrorname_np return value [BZ #26555 ] It returns the string of the error constant, not its description (as strerrordesc_np). To handle the Hurd error mapping, the ERR_MAP was removed from errlist.h to errlist.c. Also, the testcase test-strerr (added on `325081b9eb`) was not added on the check build neither it builds correctly. This patch also changed it to decouple from errlist.h, the expected return values are added explicitly for both both strerrorname_np and strerrordesc_np directly. Checked on x86_64-linux-gnu and i686-linux-gnu. I also run a make check for i686-gnu.	6 years ago
H.J. Lu	dfb8e514cf	Set tunable value as well as min/max values Some tunable values and their minimum/maximum values must be determinted at run-time. Add TUNABLE_SET_WITH_BOUNDS and TUNABLE_SET_WITH_BOUNDS_FULL to update tunable value together with minimum and maximum values. __tunable_set_val is updated to set tunable value as well as min/max values.	6 years ago
Vincent Mihalkovic	c670278934	ld.so: add an --argv0 option [BZ #16124 ]	6 years ago
Patrick McGehearty	d3c5702747	Reversing calculation of __x86_shared_non_temporal_threshold The __x86_shared_non_temporal_threshold determines when memcpy on x86 uses non_temporal stores to avoid pushing other data out of the last level cache. This patch proposes to revert the calculation change made by H.J. Lu's patch of June 2, 2017. H.J. Lu's patch selected a threshold suitable for a single thread getting maximum performance. It was tuned using the single threaded large memcpy micro benchmark on an 8 core processor. The last change changes the threshold from using 3/4 of one thread's share of the cache to using 3/4 of the entire cache of a multi-threaded system before switching to non-temporal stores. Multi-threaded systems with more than a few threads are server-class and typically have many active threads. If one thread consumes 3/4 of the available cache for all threads, it will cause other active threads to have data removed from the cache. Two examples show the range of the effect. John McCalpin's widely parallel Stream benchmark, which runs in parallel and fetches data sequentially, saw a 20% slowdown with this patch on an internal system test of 128 threads. This regression was discovered when comparing OL8 performance to OL7. An example that compares normal stores to non-temporal stores may be found at https://vgatherps.github.io/2018-09-02-nontemporal/. A simple test shows performance loss of 400 to 500% due to a failure to use nontemporal stores. These performance losses are most likely to occur when the system load is heaviest and good performance is critical. The tunable x86_non_temporal_threshold can be used to override the default for the knowledgable user who really wants maximum cache allocation to a single thread in a multi-threaded system. The manual entry for the tunable has been expanded to provide more information about its purpose. modified: sysdeps/x86/cacheinfo.c modified: manual/tunables.texi	6 years ago
Adhemerval Zanella	b16f282cb0	linux: Add time64 recvmmsg support The wire-up syscall __NR_recvmmsg_time64 (for 32-bit) or __NR_recvmmsg (for 64-bit) is used as default. The 32-bit fallback is used iff __ASSUME_TIME64_SYSCALLS is not defined, which assumes the kernel ABI provides either __NR_socketcall or __NR_recvmmsg (32-bit time_t). It does not handle the timestamps on ancillary data (SCM_TIMESTAMPING records). Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Alistair Francis <alistair.francis@wdc.com>	6 years ago
Adhemerval Zanella	c3a020eedd	linux: Add time64 support for nanosleep It uses __clock_nanosleep64 and adds the __nanosleep64 symbol. Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15 kernel). Reviewed-by: Alistair Francis <alistair.francis@wdc.com>	6 years ago
Adhemerval Zanella	4af88f96de	linux: Consolidate utimes The generic version does not have time64 support and Linux default uses utimensat. With hppa version gone, __ASSUME_UTIMES is not used anymore. Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15 kernel). Reviewed-by: Alistair Francis <alistair.francis@wdc.com>	6 years ago
Adhemerval Zanella	7c7671767e	linux: Use 64-bit time_t syscall on clock_getcputclockid The syscall __NR_clock_getres_time64 (for 32-bit) or __NR_clock_getres (for 64-bit) is used as default. The 32-bit fallback is used iff __ASSUME_TIME64_SYSCALLS is not defined, which assumes the kernel ABI provides either __NR_rt_sigtimedwait (32-bit time_t). Since the symbol does not use any type which might be affected by the time_t, there is no need to add a 64-bit variant. Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15 kernel). Reviewed-by: Alistair Francis <alistair.francis@wdc.com>	6 years ago
Adhemerval Zanella	94a83d8667	linux: Add time64 sigtimedwait support The syscall __NR_sigtimedwait_time64 (for 32-bit) or __NR_sigtimedwait (for 64-bit) is used as default. The 32-bit fallback is used iff __ASSUME_TIME64_SYSCALLS is not defined, which assumes the kernel ABI provides either __NR_rt_sigtimedwait (32-bit time_t). Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Alistair Francis <alistair.francis@wdc.com>	6 years ago
Adhemerval Zanella	2433d39b69	linux: Add time64 select support The syscall __NR_pselect6_time64 (32-bit) or __NR_pselect6 (64-bit) is used as default. For architectures with __ASSUME_TIME64_SYSCALLS the 32-bit fallback uses __NR_select/__NR__newselect or __NR_pselect6 (it should cover the microblaze case where older kernels do not provide __NR_pselect6). Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15 kernel). Reviewed-by: Alistair Francis <alistair.francis@wdc.com>	6 years ago

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