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2018-05-17nptl: Remove __ASSUME_PRIVATE_FUTEXH.J. Lu
Since __ASSUME_PRIVATE_FUTEX is always defined, this patch removes the !__ASSUME_PRIVATE_FUTEX paths. Tested with build-many-glibcs.py. * nptl/allocatestack.c (allocate_stack): Remove the !__ASSUME_PRIVATE_FUTEX paths. * nptl/descr.h (header): Remove the !__ASSUME_PRIVATE_FUTEX path. * nptl/nptl-init.c (__pthread_initialize_minimal_internal): Likewise. * sysdeps/i386/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Removed. * sysdeps/powerpc/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Likewise. * sysdeps/sh/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Likewise. * sysdeps/x86_64/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Likewise. * sysdeps/i386/nptl/tls.h: (tcbhead_t): Remve the !__ASSUME_PRIVATE_FUTEX path. * sysdeps/s390/nptl/tls.h (tcbhead_t): Likewise. * sysdeps/sparc/nptl/tls.h (tcbhead_t): Likewise. * sysdeps/x86_64/nptl/tls.h (tcbhead_t): Likewise. * sysdeps/unix/sysv/linux/i386/lowlevellock.S: Remove the !__ASSUME_PRIVATE_FUTEX macros. * sysdeps/unix/sysv/linux/lowlevellock-futex.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/cancellation.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Likewise. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_PRIVATE_FUTEX): Removed.
2018-05-02x86: Use pad in pthread_unwind_buf to preserve shadow stack registerH.J. Lu
The pad array in struct pthread_unwind_buf is used by setjmp to save shadow stack register. We assert that size of struct pthread_unwind_buf is no less than offset of shadow stack pointer + shadow stack pointer size. Since functions, like LIBC_START_MAIN, START_THREAD_DEFN as well as these with thread cancellation, call setjmp, but never return after __libc_unwind_longjmp, __libc_unwind_longjmp, which is defined as __libc_longjmp on x86, doesn't need to restore shadow stack register. __libc_longjmp, which is a private interface for thread cancellation implementation in libpthread, is changed to call __longjmp_cancel, instead of __longjmp. __longjmp_cancel is a new internal function in libc, which is similar to __longjmp, but doesn't restore shadow stack register. The compatibility longjmp and siglongjmp in libpthread.so are changed to call __libc_siglongjmp, instead of __libc_longjmp, so that they will restore shadow stack register. Tested with build-many-glibcs.py. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com> * nptl/pthread_create.c (START_THREAD_DEFN): Clear previous handlers after setjmp. * setjmp/longjmp.c (__libc_longjmp): Don't define alias if defined. * sysdeps/unix/sysv/linux/x86/setjmpP.h: Include <libc-pointer-arith.h>. (_JUMP_BUF_SIGSET_BITS_PER_WORD): New. (_JUMP_BUF_SIGSET_NSIG): Changed to 96. (_JUMP_BUF_SIGSET_NWORDS): Changed to use ALIGN_UP and _JUMP_BUF_SIGSET_BITS_PER_WORD. * sysdeps/x86/Makefile (sysdep_routines): Add __longjmp_cancel. * sysdeps/x86/__longjmp_cancel.S: New file. * sysdeps/x86/longjmp.c: Likewise. * sysdeps/x86/nptl/pt-longjmp.c: Likewise.
2018-04-03Filter out NPTL internal signals (BZ #22391)Adhemerval Zanella
This patch filters out the internal NPTL signals (SIGCANCEL/SIGTIMER and SIGSETXID) from signal functions. GLIBC on Linux requires both signals to proper implement pthread cancellation, posix timers, and set*id posix thread synchronization. And not filtering out the internal signal is troublesome: - A conformant program on a architecture that does not filter out the signals might inadvertently disable pthread asynchronous cancellation, set*id synchronization or posix timers. - It might also to security issues if SIGSETXID is masked and set*id functions are called (some threads might have effective user or group id different from the rest). The changes are basically: - Change __is_internal_signal to bool and used on all signal function that has a signal number as input. Also for signal function which accepts signals sets (sigset_t) it assumes that canonical function were used to add/remove signals which lead to some input simplification. - Fix tst-sigset.c to avoid check for SIGCANCEL/SIGTIMER and SIGSETXID. It is rewritten to check each signal indidually and to check realtime signals using canonical macros. - Add generic __clear_internal_signals and __is_internal_signal version since both symbols are used on generic implementations. - Remove superflous sysdeps/nptl/sigfillset.c. - Remove superflous SIGTIMER handling on Linux __is_internal_signal since it is the same of SIGCANCEL. - Remove dangling define and obvious comment on nptl/sigaction.c. Checked on x86_64-linux-gnu. [BZ #22391] * nptl/sigaction.c (__sigaction): Use __is_internal_signal to check for internal nptl signals. * nptl/sigaction.c (__sigaction): Likewise. * signal/sigaddset.c (sigaddset): Likewise. * signal/sigdelset.c (sigdelset): Likewise. * sysdeps/posix/signal.c (__bsd_signal): Likewise. * sysdeps/posix/sigset.c (sigset): Call and check sigaddset return value. * signal/sigfillset.c (sigfillset): User __clear_internal_signals to filter out internal nptl signals. * signal/tst-sigset.c (do_test): Check ech signal indidually and also check realtime signals using standard macros. * sysdeps/generic/internal-signals.h (__clear_internal_signals, __is_internal_signal, __libc_signal_block_all, __libc_signal_block_app, __libc_signal_restore_set): New functions. * sysdeps/nptl/sigfillset.c: Remove file. * sysdeps/unix/sysv/linux/internal-signals.h (__is_internal_signal): Change return to bool. (__clear_internal_signals): Remove SIGTIMER clean since it is equal to SIGCANEL on Linux. * sysdeps/unix/sysv/linux/sigtimedwait.c (__sigtimedwait): Assume signal set was constructed using standard functions. Reported-by: Yury Norov <ynorov@caviumnetworks.com>
2018-03-05nptl: Fix tst-cancel4 sendto testsAdhemerval Zanella
Now that send might be implemented calling sendto syscall on Linux, I am seeing some issue in some kernel configurations where tst-cancel4 sendto do not block as expected. The socket used to force the syscall blocking is used with default system configuration for buffer sending size, which might not be suffice to force blocking. This patch fixes it by explicit setting buffer socket lower than the buffer size used. It also enables sendto cancellation tests to work in both ways (since internally send is implemented routing to sendto on Linux kernel). The patch also removes unrequired make rules on some archictures for send/recv. The generic nptl Makefile already set the compiler flags required on some architectures for correct unwinding and libc object are not strictly required to support unwind (since pthread_cancel requires linking against libpthread). Checked on aarch64-linux-gnu and x86_64-linux-gnu. I also did a sniff test with tst-cancel{4,5} on a simulated mips64-linux-gnu. * nptl/tst-cancel4-common.h (set_socket_buffer): New function. * nptl/tst-cancel4-common.c (do_test): Call set_socket_buffer for socketpair endpoint. * nptl/tst-cancel4.c (tf_send): Call set_socket_buffer and use WRITE_BUFFER_SIZE as buffer size for sending socket. (tf_sendto): Use SOCK_STREAM instead of SOCK_DGRAM and fix an issue on system where send is implemented with sendto syscall. * sysdeps/unix/sysv/linux/mips/mips64/Makefile [$(subdir) = socket] (CFLAGS-recv.c, CFLAGS-send.c): Remove rules. [$(subdir) = nptl] (CFLAGS-recv.c, CFLAGS-send.c): Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/Makefile: Remove file.
2018-03-01nptl: Turn libpthread.so into a symbolic link to the real DSOFlorian Weimer
The linker script is no longer needed.
2018-03-01nptl: Drop libpthread_nonshared.a from libpthread.soFlorian Weimer
Fixes commit bd60ce86520b781ca24b99b2555e2ad389bbfeaa (nptl: Move pthread_atfork to libc_nonshared.a).
2018-03-01nptl: Move pthread_atfork to libc_nonshared.aFlorian Weimer
libpthread_nonshared.a is unused after this, so remove it from the build. There is no ABI impact because pthread_atfork was implemented using __register_atfork in libc even before this change. pthread_atfork has to be a weak alias because pthread_* names are not reserved in libc. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2018-02-22Refactor atfork handlersAdhemerval Zanella
Current implementation (sysdeps/nptl/fork.c) replicates the atfork handlers list backward to invoke the child handlers after fork/clone syscall. The internal atfork handlers is implemented as a single-linked list so a lock-free algorithm can be used, trading fork mulithread call performance for some code complexity and dynamic stack allocation (since the backwards list should not fail). This patch refactor it to use a dynarary instead of a linked list. It simplifies the external variables need to be exported and also the internal atfork handler member definition. The downside is a serialization of fork call in multithread, since to operate on the dynarray the internal lock should be used. However as noted by Florian, it already acquires external locks for malloc and libio so it is already hitting some lock contention. Besides, posix_spawn should be faster and more scalable to run external programs in multithread environments. Checked on x86_64-linux-gnu. * nptl/Makefile (routines): Remove unregister-atfork. * nptl/register-atfork.c (fork_handler_pool): Remove variable. (fork_handler_alloc): Remove function. (fork_handlers, fork_handler_init): New variables. (__fork_lock): Rename to atfork_lock. (__register_atfork, __unregister_atfork, libc_freeres_fn): Rewrite to use a dynamic array to add/remove atfork handlers. * sysdeps/nptl/fork.c (__libc_fork): Likewise. * sysdeps/nptl/fork.h (__fork_lock, __fork_handlers, __linkin_atfork): Remove declaration. (fork_handler): Remove next, refcntr, and need_signal member. (__run_fork_handler_type): New enum. (__run_fork_handlers): New prototype. * sysdeps/nptl/libc-lockP.h (__libc_atfork): Remove declaration.
2018-02-22Rename nptl-signals.h to internal-signals.hAdhemerval Zanella
This patch renames the nptl-signals.h header to internal-signals.h. On Linux the definitions and functions are not only NPTL related, but used for other POSIX definitions as well (for instance SIGTIMER for posix times, SIGSETXID for id functions, and signal block/restore helpers) and since generic functions will be places and used in generic implementation it makes more sense to decouple it from NPTL. Checked on x86_64-linux-gnu. * sysdeps/nptl/nptl-signals.h: Move to ... * sysdeps/generic/internal-signals.h: ... here. Adjust internal comments. * sysdeps/unix/sysv/linux/internal-signals.h: Add include guards. (__nptl_is_internal_signal): Rename to __is_internal_signal. (__nptl_clear_internal_signals): Rename to __clear_internal_signals. * sysdeps/unix/sysv/linux/raise.c: Adjust nptl-signal.h to include-signals.h rename. * nptl/pthreadP.h: Likewise. * sysdeps/unix/sysv/linux/spawni.c (__spawni_child): Call __is_internal_signal instead of __nptl_is_internal_signal.
2018-02-16Add runtime check if mutex will be elided in tst-mutex8 testcases.Stefan Liebler
An elided mutex don't fail destroy. Elision was disabled for the test nptl/tst-mutex8 in nptl/Makefile. Thus we can run tests which destroy a locked mutex. As elision is only disabled for tst-mutex8, the variants tst-mutex8-static, tst-mutexpi8 and tst-mutexpi8-static are still failing if lock elision is enabled. This patch adds a runtime check, if the checked type of mutex will be elided. This check is using TUNABLE_GET_FULL to determine if elision is enabled via the tunables framework. The pthread_mutex_destroy tests are only run if we dont't assume an elided mutex. This way, we can run the whole glibc testsuite with or without enabled lock elision. ChangeLog: * nptl/Makefile (tst-mutex8-ENV): Delete. * nptl/tst-mutex8.c (check_type): Add runtime check if mutex will be elided.
2018-01-25Revert Intel CET changes to __jmp_buf_tag (Bug 22743)Carlos O'Donell
In commit cba595c350e52194e10c0006732e1991e3d0803b and commit f81ddabffd76ac9dd600b02adbf3e1dac4bb10ec, ABI compatibility with applications was broken by increasing the size of the on-stack allocated __pthread_unwind_buf_t beyond the oringal size. Applications only have the origianl space available for __pthread_unwind_register, and __pthread_unwind_next to use, any increase in the size of __pthread_unwind_buf_t causes these functions to write beyond the original structure into other on-stack variables leading to segmentation faults in common applications like vlc. The only workaround is to version those functions which operate on the old sized objects, but this must happen in glibc 2.28. Thank you to Andrew Senkevich, H.J. Lu, and Aurelien Jarno, for submitting reports and tracking the issue down. The commit reverts the above mentioned commits and testing on x86_64 shows that the ABI compatibility is restored. A tst-cleanup1 regression test linked with an older glibc now passes when run with the newly built glibc. Previously a tst-cleanup1 linked with an older glibc would segfault when run with an affected glibc build. Tested on x86_64 with no regressions. Signed-off-by: Carlos O'Donell <carlos@redhat.com>
2018-01-16nptl/tst-thread-exit-clobber: Run with any C++ compilerFlorian Weimer
We do not need thread_local support in the C++11 comiler, and the minimum GCC version for glibc has C++11 support (if it has C++ support).
2018-01-16nptl/tst-minstack-throw: Compile in C++11 mode with GNU extensionsFlorian Weimer
2018-01-15nptl: Add PTHREAD_MIN_STACK C++ throw test [BZ #22636]Florian Weimer
2018-01-11nptl: Add tst-minstack-cancel, tst-minstack-exit [BZ #22636]Florian Weimer
I verified that without the guard accounting change in commit 630f4cc3aa019ede55976ea561f1a7af2f068639 (Fix stack guard size accounting) and RTLD_NOW for libgcc_s introduced by commit f993b8754080ac7572b692870e926d8b493db16c (nptl: Open libgcc.so with RTLD_NOW during pthread_cancel), the tst-minstack-cancel test fails on an AVX-512F machine. tst-minstack-exit still passes, and either of the mentioned commit by itself frees sufficient stack space to make tst-minstack-cancel pass, too. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2018-01-08[BZ #22637] Fix stack guard size accountingSzabolcs Nagy
Previously if user requested S stack and G guard when creating a thread, the total mapping was S and the actual available stack was S - G - static_tls, which is not what the user requested. This patch fixes the guard size accounting by pretending the user requested S+G stack. This way all later logic works out except when reporting the user requested stack size (pthread_getattr_np) or when computing the minimal stack size (__pthread_get_minstack). Normally this will increase thread stack allocations by one page. TLS accounting is not affected, that will require a separate fix. [BZ #22637] * nptl/descr.h (stackblock, stackblock_size): Update comments. * nptl/allocatestack.c (allocate_stack): Add guardsize to stacksize. * nptl/nptl-init.c (__pthread_get_minstack): Remove guardsize from stacksize. * nptl/pthread_getattr_np.c (pthread_getattr_np): Likewise.
2018-01-08nptl: Add test for callee-saved register restore in pthread_exitFlorian Weimer
GCC PR 83641 results in a miscompilation of libpthread, which causes pthread_exit not to restore callee-saved registers before running destructors for objects on the stack. This test detects this situation: info: unsigned int, direct pthread_exit call tst-thread-exit-clobber.cc:80: numeric comparison failure left: 4148288912 (0xf741dd90); from: value right: 1600833940 (0x5f6ac994); from: magic_values.v2 info: double, direct pthread_exit call info: unsigned int, indirect pthread_exit call info: double, indirect pthread_exit call error: 1 test failures
2018-01-06Avoid race conditions when rebuilding librt.soPalmer Dabbelt
`make check' sometimes triggers a rebuild of librt.so using nptl/Makefile, which ignores librt's dependence on libpthread. This causes the build to blow up when we attempt to run the test suite on RISC-V. 2018-01-06 Palmer Dabbelt <palmer@sifive.com> * nptl/Makefile (/librt.so): Always depend on "$(shared-thread-library)".
2018-01-01Update copyright dates not handled by scripts/update-copyrights.Joseph Myers
I've updated copyright dates in glibc for 2018. This is the patch for the changes not generated by scripts/update-copyrights and subsequent build / regeneration of generated files. Please remember to include 2018 in the dates for any new files added in future (which means updating any existing uncommitted patches you have that add new files to use the new copyright dates in them). * NEWS: Update copyright dates. * catgets/gencat.c (print_version): Likewise. * csu/version.c (banner): Likewise. * debug/catchsegv.sh: Likewise. * debug/pcprofiledump.c (print_version): Likewise. * debug/xtrace.sh (do_version): Likewise. * elf/ldconfig.c (print_version): Likewise. * elf/ldd.bash.in: Likewise. * elf/pldd.c (print_version): Likewise. * elf/sotruss.sh: Likewise. * elf/sprof.c (print_version): Likewise. * iconv/iconv_prog.c (print_version): Likewise. * iconv/iconvconfig.c (print_version): Likewise. * locale/programs/locale.c (print_version): Likewise. * locale/programs/localedef.c (print_version): Likewise. * login/programs/pt_chown.c (print_version): Likewise. * malloc/memusage.sh (do_version): Likewise. * malloc/memusagestat.c (print_version): Likewise. * malloc/mtrace.pl: Likewise. * manual/libc.texinfo: Likewise. * nptl/version.c (banner): Likewise. * nscd/nscd.c (print_version): Likewise. * nss/getent.c (print_version): Likewise. * nss/makedb.c (print_version): Likewise. * posix/getconf.c (main): Likewise. * scripts/test-installation.pl: Likewise. * sysdeps/unix/sysv/linux/lddlibc4.c (main): Likewise.
2018-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
2017-12-20nptl: Consolidate pthread_{timed,try}join{_np}Adhemerval Zanella
This patch consolidates the pthread_join and gnu extensions to avoid code duplication. The function pthread_join, pthread_tryjoin_np, and pthread_timedjoin_np are now based on pthread_timedjoin_ex. It also fixes some inconsistencies on ESRCH, EINVAL, EDEADLK handling (where each implementation differs from each other) and also on clenup handler (which now always use a CAS). Checked on i686-linux-gnu and x86_64-linux-gnu. * nptl/pthreadP.h (__pthread_timedjoin_np): Define. * nptl/pthread_join.c (pthread_join): Use __pthread_timedjoin_np. * nptl/pthread_tryjoin.c (pthread_tryjoin): Likewise. * nptl/pthread_timedjoin.c (cleanup): Use CAS on argument setting. (pthread_timedjoin_np): Define internal symbol and common code from pthread_join. * sysdeps/unix/sysv/linux/i386/lowlevellock.h (__lll_timedwait_tid): Remove superflous checks. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (__lll_timedwait_tid): Likewise. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2017-12-20nptl: Implement pthread_self in libc.so [BZ #22635]Florian Weimer
All binaries use TLS and thus need a properly set up TCB, so we can simply return its address directly, instead of forwarding to the libpthread implementation from libc. For versioned symbols, the dynamic linker checks that the soname matches the name supplied by the link editor, so a compatibility symbol in libpthread is needed. To avoid linking against the libpthread function in all cases, we would have to bump the symbol version of libpthread in libc.so and supply a compat symbol. This commit does not do that because the function implementation is so small, so the overhead by two active copies of the same function might well be smaller than the increase in symbol table size.
2017-12-19Linux/x86: Update cancel_jmp_buf to match __jmp_buf_tag [BZ #22563]H.J. Lu
On x86, padding in struct __jmp_buf_tag is used for shadow stack pointer to support shadow stack in Intel Control-flow Enforcemen Technology. Since the cancel_jmp_buf array is passed to setjmp and longjmp by casting it to pointer to struct __jmp_buf_tag, it should be as large as struct __jmp_buf_tag. Otherwise when shadow stack is enabled, setjmp and longjmp will write and read beyond cancel_jmp_buf when saving and restoring shadow stack pointer. This patch adds bits/types/__cancel_jmp_buf_tag.h to define struct __cancel_jmp_buf_tag so that Linux/x86 can add saved_mask to cancel_jmp_buf. Tested natively on i386, x86_64 and x32. Tested hppa-linux-gnu with build-many-glibcs.py. [BZ #22563] * bits/types/__cancel_jmp_buf_tag.h: New file. * sysdeps/unix/sysv/linux/x86/bits/types/__cancel_jmp_buf_tag.h * sysdeps/unix/sysv/linux/x86/pthreaddef.h: Likewise. * sysdeps/unix/sysv/linux/x86/nptl/pthreadP.h: Likewise. * nptl/Makefile (headers): Add bits/types/__cancel_jmp_buf_tag.h. * nptl/descr.h [NEED_SAVED_MASK_IN_CANCEL_JMP_BUF] (pthread_unwind_buf): Add saved_mask to cancel_jmp_buf. * sysdeps/nptl/pthread.h: Include <bits/types/__cancel_jmp_buf_tag.h>. (__pthread_unwind_buf_t): Use struct __cancel_jmp_buf_tag with __cancel_jmp_buf. * sysdeps/unix/sysv/linux/hppa/pthread.h: Likewise.
2017-12-18Disable -Wrestrict for two nptl/tst-attr3.c tests.Joseph Myers
nptl/tst-attr3 fails to build with GCC mainline because of (deliberate) aliasing between the second (attributes) and fourth (argument to thread start routine) arguments to pthread_create. Although both those arguments are restrict-qualified in POSIX, pthread_create does not actually dereference its fourth argument; it's an opaque pointer passed to the thread start routine. Thus, the aliasing is actually valid in this case, and it's deliberate in the test. So this patch makes the test disable -Wrestrict for the two pthread_create calls in question. (-Wrestrict was added in GCC 7, hence the __GNUC_PREREQ conditions, but the particular warning in question is new in GCC 8.) Tested compilation with build-many-glibcs.py for aarch64-linux-gnu. * nptl/tst-attr3.c: Include <libc-diag.h>. (do_test) [__GNUC_PREREQ (7, 0)]: Ignore -Wrestrict for two tests.
2017-12-11Replace = with += in CFLAGS-xxx.c/CPPFLAGS-xxx.cH.J. Lu
Replace = with += in CFLAGS-xxx.c and CPPFLAGS-xxx.c to allow Makefile under sysdeps to define CFLAGS-xx.c and CPPFLAGS-xxx.c. * argp/Makefile (CFLAGS-argp-help.c): Replace = with +=. (CFLAGS-argp-parse.c): Likewise. (CFLAGS-argp-fmtstream.c): Likewise. * crypt/Makefile (CPPFLAGS-sha256-crypt.c): Likewise. (CPPFLAGS-sha512-crypt.c): Likewise. (CPPFLAGS-md5-crypt.c): Likewise. * debug/Makefile (CFLAGS-stack_chk_fail.c): Likewise. (CFLAGS-stack_chk_fail_local.c): Likewise. (CFLAGS-backtrace.c): Likewise. (CFLAGS-sprintf_chk.c): Likewise. (CFLAGS-snprintf_chk.c): Likewise. (CFLAGS-vsprintf_chk.c): Likewise. (CFLAGS-vsnprintf_chk.c): Likewise. (CFLAGS-asprintf_chk.c): Likewise. (CFLAGS-vasprintf_chk.c): Likewise. (CFLAGS-obprintf_chk.c): Likewise. (CFLAGS-dprintf_chk.c): Likewise. (CFLAGS-vdprintf_chk.c): Likewise. (CFLAGS-printf_chk.c): Likewise. (CFLAGS-fprintf_chk.c): Likewise. (CFLAGS-vprintf_chk.c): Likewise. (CFLAGS-vfprintf_chk.c): Likewise. (CFLAGS-gets_chk.c): Likewise. (CFLAGS-fgets_chk.c): Likewise. (CFLAGS-fgets_u_chk.c): Likewise. (CFLAGS-fread_chk.c): Likewise. (CFLAGS-fread_u_chk.c): Likewise. (CFLAGS-swprintf_chk.c): Likewise. (CFLAGS-vswprintf_chk.c): Likewise. (CFLAGS-wprintf_chk.c): Likewise. (CFLAGS-fwprintf_chk.c): Likewise. (CFLAGS-vwprintf_chk.c): Likewise. (CFLAGS-vfwprintf_chk.c): Likewise. (CFLAGS-fgetws_chk.c): Likewise. (CFLAGS-fgetws_u_chk.c): Likewise. (CFLAGS-read_chk.c): Likewise. (CFLAGS-pread_chk.c): Likewise. (CFLAGS-pread64_chk.c): Likewise. (CFLAGS-recv_chk.c): Likewise. (CFLAGS-recvfrom_chk.c): Likewise. (CFLAGS-tst-longjmp_chk.c): Likewise. (CPPFLAGS-tst-longjmp_chk.c): Likewise. (CFLAGS-tst-longjmp_chk2.c): Likewise. (CPPFLAGS-tst-longjmp_chk2.c): Likewise. (CFLAGS-tst-longjmp_chk3.c): Likewise. (CPPFLAGS-tst-longjmp_chk3.c): Likewise. (CFLAGS-tst-chk1.c): Likewise. (CFLAGS-tst-chk2.c): Likewise. (CFLAGS-tst-chk3.c): Likewise. (CFLAGS-tst-chk4.cc): Likewise. (CFLAGS-tst-chk5.cc): Likewise. (CFLAGS-tst-chk6.cc): Likewise. (CFLAGS-tst-lfschk1.c): Likewise. (CFLAGS-tst-lfschk2.c): Likewise. (CFLAGS-tst-lfschk3.c): Likewise. (CFLAGS-tst-lfschk4.cc): Likewise. (CFLAGS-tst-lfschk5.cc): Likewise. (CFLAGS-tst-lfschk6.cc): Likewise. (CFLAGS-tst-ssp-1.c): Likewise. * dirent/Makefile (CFLAGS-scandir.c): Likewise. (CFLAGS-scandir64.c): Likewise. (CFLAGS-scandir-tail.c): Likewise. (CFLAGS-scandir64-tail.c): Likewise. * elf/Makefile (CPPFLAGS-dl-tunables.c): Likewise. (CFLAGS-dl-tunables.c): Likewise. (CFLAGS-dl-runtime.c): Likewise. (CFLAGS-dl-lookup.c): Likewise. (CFLAGS-dl-iterate-phdr.c): Likewise. (CFLAGS-vismain.c): Likewise. (CFLAGS-tst-linkall-static.c): Likewise. (CFLAGS-tst-linkall-static.c): Likewise. (CPPFLAGS-dl-load.c): Likewise. (CFLAGS-ldconfig.c): Likewise. (CFLAGS-dl-cache.c): Likewise. (CFLAGS-cache.c): Likewise. (CFLAGS-rtld.c): Likewise. (CFLAGS-multiload.c): Likewise. (CFLAGS-filtmod1.c): Likewise. (CFLAGS-tst-align.c): Likewise. (CFLAGS-tst-align2.c): Likewise. (CFLAGS-tst-alignmod.c): Likewise. (CFLAGS-tst-alignmod2.c): Likewise. (CPPFLAGS-tst-execstack.c): Likewise. (CFLAGS-tst-ptrguard1-static.c): Likewise. (CFLAGS-tst-latepthreadmod.c): Likewise. * grp/Makefile (CFLAGS-getgrgid_r.c): Likewise. (CFLAGS-getgrnam_r.c): Likewise. (CFLAGS-getgrent_r.c): Likewise. (CFLAGS-getgrent.c): Likewise. (CFLAGS-fgetgrent.c): Likewise. (CFLAGS-fgetgrent_r.c): Likewise. (CFLAGS-putgrent.c): Likewise. (CFLAGS-initgroups.c): Likewise. (CFLAGS-getgrgid.c): Likewise. * gshadow/Makefile (CFLAGS-getsgent_r.c): Likewise. (CFLAGS-getsgent.c): Likewise. (CFLAGS-fgetsgent.c): Likewise. (CFLAGS-fgetsgent_r.c): Likewise. (CFLAGS-putsgent.c): Likewise. (CFLAGS-getsgnam.c): Likewise. (CFLAGS-getsgnam_r.c): Likewise. * iconv/Makefile (CFLAGS-iconv_prog.c): Likewise. (CFLAGS-iconv_charmap.c): Likewise. (CFLAGS-dummy-repertoire.c): Likewise. (CFLAGS-charmap.c): Likewise. (CFLAGS-linereader.c): Likewise. (CFLAGS-simple-hash.c): Likewise. (CFLAGS-gconv_conf.c): Likewise. (CFLAGS-iconvconfig.c): Likewise. * inet/Makefile (CFLAGS-gethstbyad_r.c): Likewise. (CFLAGS-gethstbyad.c): Likewise. (CFLAGS-gethstbynm_r.c): Likewise. (CFLAGS-gethstbynm.c): Likewise. (CFLAGS-gethstbynm2_r.c): Likewise. (CFLAGS-gethstbynm2.c): Likewise. (CFLAGS-gethstent_r.c): Likewise. (CFLAGS-gethstent.c): Likewise. (CFLAGS-rcmd.c): Likewise. (CFLAGS-getnetbynm_r.c): Likewise. (CFLAGS-getnetbynm.c): Likewise. (CFLAGS-getnetbyad_r.c): Likewise. (CFLAGS-getnetbyad.c): Likewise. (CFLAGS-getnetent_r.c): Likewise. (CFLAGS-getnetent.c): Likewise. (CFLAGS-getaliasent_r.c): Likewise. (CFLAGS-getaliasent.c): Likewise. (CFLAGS-getrpcent_r.c): Likewise. (CFLAGS-getrpcent.c): Likewise. (CFLAGS-getservent_r.c): Likewise. (CFLAGS-getservent.c): Likewise. (CFLAGS-getprtent_r.c): Likewise. (CFLAGS-getprtent.c): Likewise. (CFLAGS-either_ntoh.c): Likewise. (CFLAGS-either_hton.c): Likewise. (CFLAGS-getnetgrent.c): Likewise. (CFLAGS-getnetgrent_r.c): Likewise. (CFLAGS-tst-checks-posix.c): Likewise. (CFLAGS-tst-sockaddr.c): Likewise. * intl/Makefile (CFLAGS-tst-gettext.c): Likewise. (CFLAGS-tst-translit.c): Likewise. (CFLAGS-tst-gettext2.c): Likewise. (CFLAGS-tst-codeset.c): Likewise. (CFLAGS-tst-gettext3.c): Likewise. (CFLAGS-tst-gettext4.c): Likewise. (CFLAGS-tst-gettext5.c): Likewise. (CFLAGS-tst-gettext6.c): Likewise. * io/Makefile (CFLAGS-open.c): Likewise. (CFLAGS-open64.c): Likewise. (CFLAGS-creat.c): Likewise. (CFLAGS-creat64.c): Likewise. (CFLAGS-fcntl.c): Likewise. (CFLAGS-poll.c): Likewise. (CFLAGS-ppoll.c): Likewise. (CFLAGS-lockf.c): Likewise. (CFLAGS-statfs.c): Likewise. (CFLAGS-fstatfs.c): Likewise. (CFLAGS-statvfs.c): Likewise. (CFLAGS-fstatvfs.c): Likewise. (CFLAGS-fts.c): Likewise. (CFLAGS-fts64.c): Likewise. (CFLAGS-ftw.c): Likewise. (CFLAGS-ftw64.c): Likewise. (CFLAGS-lockf.c): Likewise. (CFLAGS-posix_fallocate.c): Likewise. (CFLAGS-posix_fallocate64.c): Likewise. (CFLAGS-fallocate.c): Likewise. (CFLAGS-fallocate64.c): Likewise. (CFLAGS-read.c): Likewise. (CFLAGS-write.c): Likewise. (CFLAGS-test-stat.c): Likewise. (CFLAGS-test-lfs.c): Likewise. * libio/Makefile (CFLAGS-fileops.c): Likewise. (CFLAGS-fputc.c): Likewise. (CFLAGS-fputwc.c): Likewise. (CFLAGS-freopen64.c): Likewise. (CFLAGS-freopen.c): Likewise. (CFLAGS-fseek.c): Likewise. (CFLAGS-fseeko64.c): Likewise. (CFLAGS-fseeko.c): Likewise. (CFLAGS-ftello64.c): Likewise. (CFLAGS-ftello.c): Likewise. (CFLAGS-fwide.c): Likewise. (CFLAGS-genops.c): Likewise. (CFLAGS-getc.c): Likewise. (CFLAGS-getchar.c): Likewise. (CFLAGS-getwc.c): Likewise. (CFLAGS-getwchar.c): Likewise. (CFLAGS-iofclose.c): Likewise. (CFLAGS-iofflush.c): Likewise. (CFLAGS-iofgetpos64.c): Likewise. (CFLAGS-iofgetpos.c): Likewise. (CFLAGS-iofgets.c): Likewise. (CFLAGS-iofgetws.c): Likewise. (CFLAGS-iofputs.c): Likewise. (CFLAGS-iofputws.c): Likewise. (CFLAGS-iofread.c): Likewise. (CFLAGS-iofsetpos64.c): Likewise. (CFLAGS-iofsetpos.c): Likewise. (CFLAGS-ioftell.c): Likewise. (CFLAGS-iofwrite.c): Likewise. (CFLAGS-iogetdelim.c): Likewise. (CFLAGS-iogetline.c): Likewise. (CFLAGS-iogets.c): Likewise. (CFLAGS-iogetwline.c): Likewise. (CFLAGS-ioputs.c): Likewise. (CFLAGS-ioseekoff.c): Likewise. (CFLAGS-ioseekpos.c): Likewise. (CFLAGS-iosetbuffer.c): Likewise. (CFLAGS-iosetvbuf.c): Likewise. (CFLAGS-ioungetc.c): Likewise. (CFLAGS-ioungetwc.c): Likewise. (CFLAGS-oldfileops.c): Likewise. (CFLAGS-oldiofclose.c): Likewise. (CFLAGS-oldiofgetpos64.c): Likewise. (CFLAGS-oldiofgetpos.c): Likewise. (CFLAGS-oldiofsetpos64.c): Likewise. (CFLAGS-oldiofsetpos.c): Likewise. (CFLAGS-peekc.c): Likewise. (CFLAGS-putc.c): Likewise. (CFLAGS-putchar.c): Likewise. (CFLAGS-putwc.c): Likewise. (CFLAGS-putwchar.c): Likewise. (CFLAGS-rewind.c): Likewise. (CFLAGS-wfileops.c): Likewise. (CFLAGS-wgenops.c): Likewise. (CFLAGS-oldiofopen.c): Likewise. (CFLAGS-iofopen.c): Likewise. (CFLAGS-iofopen64.c): Likewise. (CFLAGS-oldtmpfile.c): Likewise. (CFLAGS-tst_putwc.c): Likewise. * locale/Makefile (CFLAGS-md5.c): Likewise. (CFLAGS-charmap.c): Likewise. (CFLAGS-locfile.c): Likewise. (CFLAGS-charmap-dir.c): Likewise. * login/Makefile (CFLAGS-grantpt.c): Likewise. (CFLAGS-getpt.c): Likewise. (CFLAGS-pt_chown.c): Likewise. * malloc/Makefile (CFLAGS-mcheck-init.c): Likewise. (CFLAGS-obstack.c): Likewise. * math/Makefile (CFLAGS-test-tgmath3.c): Likewise. (CFLAGS-test-double-vlen4-wrappers.c): Likewise. (CFLAGS-test-double-vlen8-wrappers.c): Likewise. (CFLAGS-test-float-vlen8-wrappers.c): Likewise. (CFLAGS-test-float-vlen16-wrappers.c): Likewise. (CFLAGS-test-tgmath.c): Likewise. (CFLAGS-test-tgmath2.c): Likewise. (CFLAGS-test-tgmath-ret.c): Likewise. (CFLAGS-test-powl.c): Likewise. (CFLAGS-test-snan.c): Likewise. (CFLAGS-test-signgam-finite.c): Likewise. (CFLAGS-test-signgam-finite-c99.c): Likewise. (CFLAGS-test-signgam-finite-c11.c): Likewise. (CFLAGS-test-signgam-uchar.c): Likewise. (CFLAGS-test-signgam-uchar-init.c): Likewise. (CFLAGS-test-signgam-uchar-static.c): Likewise. (CFLAGS-test-signgam-uchar-init-static.c): Likewise. (CFLAGS-test-signgam-uint.c): Likewise. (CFLAGS-test-signgam-uint-init.c): Likewise. (CFLAGS-test-signgam-uint-static.c): Likewise. (CFLAGS-test-signgam-uint-init-static.c): Likewise. (CFLAGS-test-signgam-ullong.c): Likewise. (CFLAGS-test-signgam-ullong-init.c): Likewise. (CFLAGS-test-signgam-ullong-static.c): Likewise. (CFLAGS-test-signgam-ullong-init-static.c): Likewise. (CFLAGS-test-math-cxx11.cc): Likewise. (CFLAGS-test-math-isinff.cc): Likewise. (CFLAGS-test-math-iszero.cc): Likewise. (CFLAGS-test-math-issignaling.cc): Likewise. (CFLAGS-test-math-iscanonical.cc): Likewise. (CFLAGS-test-iszero-excess-precision.c): Likewise. (CFLAGS-test-iseqsig-excess-precision.c): Likewise. (CFLAGS-test-flt-eval-method.c): Likewise. (CFLAGS-test-fe-snans-always-signal.c): Likewise. (CFLAGS-test-finite-macros.c): Likewise. * misc/Makefile (CFLAGS-select.c): Likewise. (CFLAGS-tsearch.c): Likewise. (CFLAGS-lsearch.c): Likewise. (CFLAGS-pselect.c): Likewise. (CFLAGS-readv.c): Likewise. (CFLAGS-writev.c): Likewise. (CFLAGS-preadv.c): Likewise. (CFLAGS-preadv64.c): Likewise. (CFLAGS-pwritev.c): Likewise. (CFLAGS-pwritev64.c): Likewise. (CFLAGS-preadv2.c): Likewise. (CFLAGS-preadv64v2.c): Likewise. (CFLAGS-pwritev2.c): Likewise. (CFLAGS-pwritev64v2.c): Likewise. (CFLAGS-usleep.c): Likewise. (CFLAGS-syslog.c): Likewise. (CFLAGS-error.c): Likewise. (CFLAGS-getpass.c): Likewise. (CFLAGS-mkstemp.c): Likewise. (CFLAGS-mkstemp64.c): Likewise. (CFLAGS-getsysstats.c): Likewise. (CFLAGS-getusershell.c): Likewise. (CFLAGS-err.c): Likewise. (CFLAGS-tst-tsearch.c): Likewise. (CFLAGS-msync.c): Likewise. (CFLAGS-fdatasync.c): Likewise. (CFLAGS-fsync.c): Likewise. * nptl/Makefile (CFLAGS-nptl-init.c): Likewise. (CFLAGS-unwind.c): Likewise. (CFLAGS-unwind-forcedunwind.c): Likewise. (CFLAGS-pthread_cancel.c): Likewise. (CFLAGS-pthread_setcancelstate.c): Likewise. (CFLAGS-pthread_setcanceltype.c): Likewise. (CFLAGS-cancellation.c): Likewise. (CFLAGS-libc-cancellation.c): Likewise. (CFLAGS-pthread_exit.c): Likewise. (CFLAGS-forward.c): Likewise. (CFLAGS-pthread_testcancel.c): Likewise. (CFLAGS-pthread_join.c): Likewise. (CFLAGS-pthread_timedjoin.c): Likewise. (CFLAGS-pthread_once.c): Likewise. (CFLAGS-pthread_cond_wait.c): Likewise. (CFLAGS-sem_wait.c): Likewise. (CFLAGS-sem_timedwait.c): Likewise. (CFLAGS-fcntl.c): Likewise. (CFLAGS-lockf.c): Likewise. (CFLAGS-pread.c): Likewise. (CFLAGS-pread64.c): Likewise. (CFLAGS-pwrite.c): Likewise. (CFLAGS-pwrite64.c): Likewise. (CFLAGS-wait.c): Likewise. (CFLAGS-waitpid.c): Likewise. (CFLAGS-sigwait.c): Likewise. (CFLAGS-msgrcv.c): Likewise. (CFLAGS-msgsnd.c): Likewise. (CFLAGS-tcdrain.c): Likewise. (CFLAGS-open.c): Likewise. (CFLAGS-open64.c): Likewise. (CFLAGS-pause.c): Likewise. (CFLAGS-recv.c): Likewise. (CFLAGS-send.c): Likewise. (CFLAGS-accept.c): Likewise. (CFLAGS-sendto.c): Likewise. (CFLAGS-connect.c): Likewise. (CFLAGS-recvfrom.c): Likewise. (CFLAGS-recvmsg.c): Likewise. (CFLAGS-sendmsg.c): Likewise. (CFLAGS-close.c): Likewise. (CFLAGS-read.c): Likewise. (CFLAGS-write.c): Likewise. (CFLAGS-nanosleep.c): Likewise. (CFLAGS-sigsuspend.c): Likewise. (CFLAGS-msync.c): Likewise. (CFLAGS-fdatasync.c): Likewise. (CFLAGS-fsync.c): Likewise. (CFLAGS-pt-system.c): Likewise. (CFLAGS-tst-cleanup2.c): Likewise. (CFLAGS-tst-cleanupx2.c): Likewise. (CFLAGS-flockfile.c): Likewise. (CFLAGS-ftrylockfile.c): Likewise. (CFLAGS-funlockfile.c): Likewise. (CFLAGS-tst-initializers1.c): Likewise. (CFLAGS-tst-initializers1-c89.c): Likewise. (CFLAGS-tst-initializers1-c99.c): Likewise. (CFLAGS-tst-initializers1-c11.c): Likewise. (CFLAGS-tst-initializers1-gnu89.c): Likewise. (CFLAGS-tst-initializers1-gnu99.c): Likewise. (CFLAGS-tst-initializers1-gnu11.c): Likewise. * nscd/Makefile (CFLAGS-nscd_getpw_r.c): Likewise. (CFLAGS-nscd_getgr_r.c): Likewise. (CFLAGS-nscd_gethst_r.c): Likewise. (CFLAGS-nscd_getai.c): Likewise. (CFLAGS-nscd_initgroups.c): Likewise. * posix/Makefile (CFLAGS-getaddrinfo.c): Likewise. (CFLAGS-pause.c): Likewise. (CFLAGS-pread.c): Likewise. (CFLAGS-pread64.c): Likewise. (CFLAGS-pwrite.c): Likewise. (CFLAGS-pwrite64.c): Likewise. (CFLAGS-sleep.c): Likewise. (CFLAGS-wait.c): Likewise. (CFLAGS-waitid.c): Likewise. (CFLAGS-waitpid.c): Likewise. (CFLAGS-getopt.c): Likewise. (CFLAGS-wordexp.c): Likewise. (CFLAGS-sysconf.c): Likewise. (CFLAGS-pathconf.c): Likewise. (CFLAGS-fpathconf.c): Likewise. (CFLAGS-spawn.c): Likewise. (CFLAGS-spawnp.c): Likewise. (CFLAGS-spawni.c): Likewise. (CFLAGS-glob.c): Likewise. (CFLAGS-glob64.c): Likewise. (CFLAGS-getconf.c): Likewise. (CFLAGS-nanosleep.c): Likewise. * pwd/Makefile (CFLAGS-getpwent_r.c): Likewise. (CFLAGS-getpwent.c): Likewise. (CFLAGS-getpw.c): Likewise. (CFLAGS-fgetpwent_r.c): Likewise. * resolv/Makefile (CFLAGS-res_hconf.c): Likewise. * rt/Makefile (CFLAGS-aio_suspend.c): Likewise. (CFLAGS-mq_timedreceive.c): Likewise. (CFLAGS-mq_timedsend.c): Likewise. (CFLAGS-clock_nanosleep.c): Likewise. (CFLAGS-librt-cancellation.c): Likewise. * shadow/Makefile (CFLAGS-getspent_r.c): Likewise. (CFLAGS-getspent.c): Likewise. (CFLAGS-fgetspent.c): Likewise. (CFLAGS-fgetspent_r.c): Likewise. (CFLAGS-putspent.c): Likewise. (CFLAGS-getspnam.c): Likewise. (CFLAGS-getspnam_r.c): Likewise. * signal/Makefile (CFLAGS-sigpause.c): Likewise. (CFLAGS-sigsuspend.c): Likewise. (CFLAGS-sigtimedwait.c): Likewise. (CFLAGS-sigwait.c): Likewise. (CFLAGS-sigwaitinfo.c): Likewise. (CFLAGS-sigreturn.c): Likewise. * stdio-common/Makefile (CFLAGS-vfprintf.c): Likewise. (CFLAGS-vfwprintf.c): Likewise. (CFLAGS-tmpfile.c): Likewise. (CFLAGS-tmpfile64.c): Likewise. (CFLAGS-tempname.c): Likewise. (CFLAGS-psignal.c): Likewise. (CFLAGS-vprintf.c): Likewise. (CFLAGS-cuserid.c): Likewise. (CFLAGS-errlist.c): Likewise. (CFLAGS-siglist.c): Likewise. (CFLAGS-scanf15.c): Likewise. (CFLAGS-scanf17.c): Likewise. * stdlib/Makefile (CFLAGS-bsearch.c): Likewise. (CFLAGS-msort.c): Likewise. (CFLAGS-qsort.c): Likewise. (CFLAGS-system.c): Likewise. (CFLAGS-fmtmsg.c): Likewise. (CFLAGS-strfmon.c): Likewise. (CFLAGS-strfmon_l.c): Likewise. (CFLAGS-strfromd.c): Likewise. (CFLAGS-strfromf.c): Likewise. (CFLAGS-strfroml.c): Likewise. (CFLAGS-tst-bsearch.c): Likewise. (CFLAGS-tst-qsort.c): Likewise. (CFLAGS-tst-makecontext2.c): Likewise. * sunrpc/Makefile (CFLAGS-xbootparam_prot.c): Likewise. (CFLAGS-xnlm_prot.c): Likewise. (CFLAGS-xrstat.c): Likewise. (CFLAGS-xyppasswd.c): Likewise. (CFLAGS-xklm_prot.c): Likewise. (CFLAGS-xrex.c): Likewise. (CFLAGS-xsm_inter.c): Likewise. (CFLAGS-xmount.c): Likewise. (CFLAGS-xrusers.c): Likewise. (CFLAGS-xspray.c): Likewise. (CFLAGS-xnfs_prot.c): Likewise. (CFLAGS-xrquota.c): Likewise. (CFLAGS-xkey_prot.c): Likewise. (CFLAGS-auth_unix.c): Likewise. (CFLAGS-key_call.c): Likewise. (CFLAGS-pmap_rmt.c): Likewise. (CFLAGS-clnt_perr.c): Likewise. (CFLAGS-openchild.c): Likewise. * sysvipc/Makefile (CFLAGS-msgrcv.c): Likewise. (CFLAGS-msgsnd.c): Likewise. * termios/Makefile (CFLAGS-tcdrain.c): Likewise. * time/Makefile (CFLAGS-tzfile.c): Likewise. (CFLAGS-tzset.c): Likewise. (CFLAGS-getdate.c): Likewise. (CFLAGS-test_time.c): Likewise. (CPPFLAGS-tst-tzname.c): Likewise. * timezone/Makefile (CFLAGS-zdump.c): Likewise. (CFLAGS-zic.c): Likewise. * wcsmbs/Makefile (CFLAGS-wcwidth.c): Likewise. (CFLAGS-wcswidth.c): Likewise. (CFLAGS-wcstol.c): Likewise. (CFLAGS-wcstoul.c): Likewise. (CFLAGS-wcstoll.c): Likewise. (CFLAGS-wcstoull.c): Likewise. (CFLAGS-wcstod.c): Likewise. (CFLAGS-wcstold.c): Likewise. (CFLAGS-wcstof128.c): Likewise. (CFLAGS-wcstof.c): Likewise. (CFLAGS-wcstol_l.c): Likewise. (CFLAGS-wcstoul_l.c): Likewise. (CFLAGS-wcstoll_l.c): Likewise. (CFLAGS-wcstoull_l.c): Likewise. (CFLAGS-wcstod_l.c): Likewise. (CFLAGS-wcstold_l.c): Likewise. (CFLAGS-wcstof128_l.c): Likewise. (CFLAGS-wcstof_l.c): Likewise. (CPPFLAGS-tst-wchar-h.c): Likewise. (CPPFLAGS-wcstold_l.c): Likewise. Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
2017-12-05Add elision tunablesRogerio Alves
This patch adds several new tunables to control the behavior of elision on supported platforms[1]. Since elision now depends on tunables, we should always *compile* with elision enabled, and leave the code disabled, but available for runtime selection. This gives us *much* better compile-time testing of the existing code to avoid bit-rot[2]. Tested on ppc, ppc64, ppc64le, s390x and x86_64. [1] This part of the patch was initially proposed by Paul Murphy but was "staled" because the framework have changed since the patch was originally proposed: https://patchwork.sourceware.org/patch/10342/ [2] This part of the patch was inititally proposed as a RFC by Carlos O'Donnell. Make sense to me integrate this on the patch: https://sourceware.org/ml/libc-alpha/2017-05/msg00335.html * elf/dl-tunables.list: Add elision parameters. * manual/tunables.texi: Add entries about elision tunable. * sysdeps/unix/sysv/linux/powerpc/elision-conf.c: Add callback functions to dynamically enable/disable elision. Add multiple callbacks functions to set elision parameters. Deleted __libc_enable_secure check. * sysdeps/unix/sysv/linux/s390/elision-conf.c: Likewise. * sysdeps/unix/sysv/linux/x86/elision-conf.c: Likewise. * configure: Regenerated. * configure.ac: Option enable_lock_elision was deleted. * config.h.in: ENABLE_LOCK_ELISION flag was deleted. * config.make.in: Remove references to enable_lock_elision. * manual/install.texi: Elision configure option was removed. * INSTALL: Regenerated to remove enable_lock_elision. * nptl/Makefile: Disable elision so it can verify error case for destroying a mutex. * sysdeps/powerpc/nptl/elide.h: Cleanup ENABLE_LOCK_ELISION check. Deleted macros for the case when ENABLE_LOCK_ELISION was not defined. * sysdeps/s390/configure: Regenerated. * sysdeps/s390/configure.ac: Remove references to enable_lock_elision.. * nptl/tst-mutex8.c: Deleted all #ifndef ENABLE_LOCK_ELISION from the test. * sysdeps/powerpc/powerpc32/sysdep.h: Deleted all ENABLE_LOCK_ELISION checks. * sysdeps/powerpc/powerpc64/sysdep.h: Likewise. * sysdeps/powerpc/sysdep.h: Likewise. * sysdeps/s390/nptl/bits/pthreadtypes-arch.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/force-elision.h: Likewise. * sysdeps/unix/sysv/linux/s390/elision-conf.h: Likewise. * sysdeps/unix/sysv/linux/s390/force-elision.h: Likewise. * sysdeps/unix/sysv/linux/s390/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/s390/Makefile: Remove references to enable-lock-elision. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
2017-11-21nptl: Add workaround for ASSERT_PTHREAD_INTERNAL_SIZE with GCC 4.9Adhemerval Zanella
GCC 4.9 (the minimum current supported) emits an warning for universal zero initializer ({0}) on ASSERT_PTHREAD_INTERNAL_SIZE: pthread_attr_init.c: In function ‘__pthread_attr_init_2_1’: pthread_attr_init.c:37:3: error: missing braces around initializer [-Werror=missing-braces] ASSERT_PTHREAD_INTERNAL_SIZE (pthread_attr_t, struct pthread_attr); ^ pthread_attr_init.c:37:3: error: (near initialization for ‘(anonymous).__size’) [-Werror=missing-braces] It is fact GCC BZ#53119 [1] fixed in later version (GCC5+). Since current branch is closed and there is no indication it will be backports (comment #20 in same bug report) this patch fixes by using a double bracket to zero initialize the struct. Checked on x86_64-linux-gnu with GCC 7 and GCC 4.9. * nptl/pthreadP.h (ASSERT_PTHREAD_INTERNAL_SIZE): Add workarond for -Wmissing-braces on GCC 4.9. [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119 Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-11-16Prefer https for Sourceware linksSiddhesh Poyarekar
Update all sourceware links to https. The website redirects everything to https anyway so let the web server do a bit less work. The only reference that remains unchanged is the one in the old ChangeLog, since it didn't seem worth changing it. * NEWS: Update sourceware link to https. * configure.ac: Likewise. * crypt/md5test-giant.c: Likewise. * dlfcn/bug-atexit1.c: Likewise. * dlfcn/bug-atexit2.c: Likewise. * localedata/README: Likewise. * malloc/tst-mallocfork.c: Likewise. * manual/install.texi: Likewise. * nptl/tst-pthread-getattr.c: Likewise. * stdio-common/tst-fgets.c: Likewise. * stdio-common/tst-fwrite.c: Likewise. * sunrpc/Makefile: Likewise. * sysdeps/arm/armv7/multiarch/memcpy_impl.S: Likewise. * wcsmbs/tst-mbrtowc2.c: Likewise. * configure: Regenerate. * INSTALL: Regenerate.
2017-11-07Remove traces of tst-typesizesAndreas Schwab
2017-11-07nptl: Define __PTHREAD_MUTEX_{NUSERS_AFTER_KIND,USE_UNION}Adhemerval Zanella
This patch adds two new internal defines to set the internal pthread_mutex_t layout required by the supported ABIS: 1. __PTHREAD_MUTEX_NUSERS_AFTER_KIND which control whether to define __nusers fields before or after __kind. The preferred value for is 0 for new ports and it sets __nusers before __kind. 2. __PTHREAD_MUTEX_USE_UNION which control whether internal __spins and __list members will be place inside an union for linuxthreads compatibility. The preferred value is 0 for ports and it sets to not use an union to define both fields. It fixes the wrong offsets value for __kind value on x86_64-linux-gnu-x32. Checked with a make check run-built-tests=no on all afected ABIs. [BZ #22298] * nptl/allocatestack.c (allocate_stack): Check if __PTHREAD_MUTEX_HAVE_PREV is non-zero, instead if __PTHREAD_MUTEX_HAVE_PREV is defined. * nptl/descr.h (pthread): Likewise. * nptl/nptl-init.c (__pthread_initialize_minimal_internal): Likewise. * nptl/pthread_create.c (START_THREAD_DEFN): Likewise. * sysdeps/nptl/fork.c (__libc_fork): Likewise. * sysdeps/nptl/pthread.h (PTHREAD_MUTEX_INITIALIZER): Likewise. * sysdeps/nptl/bits/thread-shared-types.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): New defines. (__pthread_internal_list): Check __PTHREAD_MUTEX_USE_UNION instead of __WORDSIZE for internal layout. (__pthread_mutex_s): Check __PTHREAD_MUTEX_NUSERS_AFTER_KIND instead of __WORDSIZE for internal __nusers layout and __PTHREAD_MUTEX_USE_UNION instead of __WORDSIZE whether to use an union for __spins and __list fields. (__PTHREAD_MUTEX_HAVE_PREV): Define also for __PTHREAD_MUTEX_USE_UNION case. * sysdeps/aarch64/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): New defines. * sysdeps/alpha/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/arm/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/hppa/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/ia64/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/m68k/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/microblaze/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/mips/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/nios2/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/powerpc/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/s390/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/sh/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/sparc/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/tile/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. * sysdeps/x86/nptl/bits/pthreadtypes-arch.h (__PTHREAD_MUTEX_NUSERS_AFTER_KIND, __PTHREAD_MUTEX_USE_UNION): Likewise. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-11-07nptl: Change tst-typesizes to _Static_assertAdhemerval Zanella
Instead of rely on runtime check to assure correct pthread types size a better strategy would use _Static_assert to trigger an error on build time (and thus allowing to check to potentially ABI breakage on cross-compiling make check). This patch moves nptl/tst-typesizes.c to libpthread build time on each specific initialization routine and also remove some runtime redundant asserts for the same type sizes. Checked on x86_64-linux-gnu and with a build check for all affected ABIs (aarch64-linux-gnu, alpha-linux-gnu, arm-linux-gnueabihf, hppa-linux-gnu, i686-linux-gnu, ia64-linux-gnu, m68k-linux-gnu, microblaze-linux-gnu, mips64-linux-gnu, mips64-n32-linux-gnu, mips-linux-gnu, powerpc64le-linux-gnu, powerpc-linux-gnu, s390-linux-gnu, s390x-linux-gnu, sh4-linux-gnu, sparc64-linux-gnu, sparcv9-linux-gnu, tilegx-linux-gnu, tilegx-linux-gnu-x32, tilepro-linux-gnu, x86_64-linux-gnu, and x86_64-linux-x32). * nptl/pthreadP.h (ASSERT_TYPE_SIZE, ASSERT_PTHREAD_INTERNAL_SIZE): New macros. * nptl/pthread_attr_init.c (__pthread_mutex_init): Add build time checks for expected input type size. * nptl/pthread_barrier_init.c (__pthread_barrier_init): Likewise. * nptl/pthread_barrierattr_init.c (pthread_barrierattr_init): Likewise. * nptl/pthread_cond_init.c (__pthread_cond_init): Likewise. * nptl/pthread_condattr_init.c (__pthread_condattr_init): Likewise. * nptl/pthread_mutex_init.c (__pthread_mutex_init): Likewise. * nptl/pthread_mutexattr_init.c (__pthread_mutexattr_init): Likewise. * nptl/pthread_rwlock_init.c (__pthread_rwlock_init): Likewise. * nptl/pthread_rwlockattr_init.c (pthread_rwlockattr_init): Likewise. * nptl/sem_init.c (__new_sem_init, __old_sem_init): Likewise * nptl/pthread_attr_destroy.c (__pthread_attr_destroy): Remove superflous runtime assert check. * nptl/pthread_attr_getaffinity.c (__pthread_attr_getaffinity_new): Likewise. * nptl/pthread_attr_getdetachstate.c (__pthread_attr_getdetachstate): Likewise. * nptl/pthread_attr_getguardsize.c (pthread_attr_getguardsize): Likewise. * nptl/pthread_attr_getinheritsched.c (__pthread_attr_getinheritsched): Likewise. * nptl/pthread_attr_getschedparam.c (__pthread_attr_getschedparam): Likewise. * nptl/pthread_attr_getschedpolicy.c (__pthread_attr_getschedpolicy): Likewise. * nptl/pthread_attr_getscope.c (__pthread_attr_getscope): Likewise. * nptl/pthread_attr_getstack.c (__pthread_attr_getstack): Likewise. * nptl/pthread_attr_getstackaddr.c (__pthread_attr_getstackaddr): Likewise. * nptl/pthread_attr_getstacksize.c (__pthread_attr_getstacksize): Likewise. * nptl/pthread_attr_setaffinity.c (__pthread_attr_setaffinity_new): Likewise. * nptl/pthread_attr_setdetachstate.c (__pthread_attr_setdetachstate): Likewise. * nptl/pthread_attr_setguardsize.c (pthread_attr_setguardsize): Likewise. * nptl/pthread_attr_setinheritsched.c (__pthread_attr_setinheritsched): Likewise. * nptl/pthread_attr_setschedparam.c (__pthread_attr_setschedparam): Likewise. * nptl/pthread_attr_setschedpolicy.c (__pthread_attr_setschedpolicy): Likewise. * nptl/pthread_attr_setscope.c (__pthread_attr_setscope): Likewise. * nptl/pthread_attr_setstack.c (__pthread_attr_setstack, __old_pthread_attr_setstack): Likewise. * nptl/pthread_attr_setstackaddr.c (__pthread_attr_setstackaddr): Likewise. * nptl/pthread_attr_setstacksize.c (__pthread_attr_setstacksize): Likewise. * nptl/pthread_getattr_default_np.c (pthread_getattr_default_np): Likewise. * nptl/pthread_mutex_lock.c (__pthread_mutex_lock): Likewise. * nptl/pthread_setattr_default_np.c (pthread_setattr_default_np): Likewise. * nptl/tst-typesizes.c: Remove file. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-11-07nptl: Add tests for internal pthread_mutex_t offsetsAdhemerval Zanella
This patch adds a new build test to check for internal fields offsets for user visible internal field. Although currently the only field which is statically initialized to a non zero value is pthread_mutex_t.__data.__kind value, the tests also check the offset of __kind, __spins, __elision (if supported), and __list internal member. A internal header (pthread-offset.h) is added to each major ABI with the reference value. Checked on x86_64-linux-gnu and with a build check for all affected ABIs (aarch64-linux-gnu, alpha-linux-gnu, arm-linux-gnueabihf, hppa-linux-gnu, i686-linux-gnu, ia64-linux-gnu, m68k-linux-gnu, microblaze-linux-gnu, mips64-linux-gnu, mips64-n32-linux-gnu, mips-linux-gnu, powerpc64le-linux-gnu, powerpc-linux-gnu, s390-linux-gnu, s390x-linux-gnu, sh4-linux-gnu, sparc64-linux-gnu, sparcv9-linux-gnu, tilegx-linux-gnu, tilegx-linux-gnu-x32, tilepro-linux-gnu, x86_64-linux-gnu, and x86_64-linux-x32). * nptl/pthreadP.h (ASSERT_PTHREAD_STRING, ASSERT_PTHREAD_INTERNAL_OFFSET): New macro. * nptl/pthread_mutex_init.c (__pthread_mutex_init): Add build time checks for internal pthread_mutex_t offsets. * sysdeps/aarch64/nptl/pthread-offsets.h (__PTHREAD_MUTEX_NUSERS_OFFSET, __PTHREAD_MUTEX_KIND_OFFSET, __PTHREAD_MUTEX_SPINS_OFFSET, __PTHREAD_MUTEX_ELISION_OFFSET, __PTHREAD_MUTEX_LIST_OFFSET): New macro. * sysdeps/alpha/nptl/pthread-offsets.h: Likewise. * sysdeps/arm/nptl/pthread-offsets.h: Likewise. * sysdeps/hppa/nptl/pthread-offsets.h: Likewise. * sysdeps/i386/nptl/pthread-offsets.h: Likewise. * sysdeps/ia64/nptl/pthread-offsets.h: Likewise. * sysdeps/m68k/nptl/pthread-offsets.h: Likewise. * sysdeps/microblaze/nptl/pthread-offsets.h: Likewise. * sysdeps/mips/nptl/pthread-offsets.h: Likewise. * sysdeps/nios2/nptl/pthread-offsets.h: Likewise. * sysdeps/powerpc/nptl/pthread-offsets.h: Likewise. * sysdeps/s390/nptl/pthread-offsets.h: Likewise. * sysdeps/sh/nptl/pthread-offsets.h: Likewise. * sysdeps/sparc/nptl/pthread-offsets.h: Likewise. * sysdeps/tile/nptl/pthread-offsets.h: Likewise. * sysdeps/x86_64/nptl/pthread-offsets.h: Likewise. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-10-13nptl: Preserve error in setxid thread broadcast in coredumps [BZ #22153]Peter Zelezny
2017-09-26Mark __dso_handle as hidden [BZ #18822]H.J. Lu
Since __dso_handle is always defined by either crtbegin.o from GCC or dso_handle.c, it should be marked as hidden and be passed directly. [BZ #18822] * dlfcn/modatexit.c (foo): Remove __dso_handle check. * dlfcn/modcxaatexit.c: Include <dso_handle.h>. (__dso_handle): Remove declaration. * dlfcn/tstatexit.c (__dso_handle): Removed. (main): Don't check __dso_handle. * dlfcn/tstcxaatexit.c (__dso_handle): Removed. (main): Don't check __dso_handle. * include/dso_handle.h: New file. * malloc/mtrace.c: Include <dso_handle.h>. (mtrace): Pass __dso_handle directly. * nptl/pthread_atfork.c: Include <dso_handle.h>. (__dso_handle): Remove declaration. (__pthread_atfork): Pass __dso_handle directly. * nptl/tst-atfork2mod.c: Include <dso_handle.h>. (__dso_handle): Removed. * posix/wordexp-test.c: Include <dso_handle.h>. (__dso_handle): Remove declaration. (__app_register_atfork): Pass __dso_handle directly. * stdlib/at_quick_exit.c: Include <dso_handle.h>. (__dso_handle): Remove declaration. (at_quick_exit): Pass __dso_handle directly. * stdlib/atexit.c: Include <dso_handle.h>. (__dso_handle): Remove declaration. (atexit): Pass __dso_handle directly. * stdlib/tst-tls-atexit-lib.c: Include <dso_handle.h>. (__dso_handle): Removed.
2017-09-21Remove non-add-on Banner files.Joseph Myers
Various subdirectories of glibc include Banner files to put some text in the output of executing libc.so.6, under "Available extensions". Some of those subdirectories (e.g. crypt) may originally have been add-ons (and so optional, so a particular glibc build might or might not have included them), but except for libidn they aren't now (or if only included in some builds, in the case of soft-fp, the inclusion depends on the architecture for which glibc is configured rather than having any glibc configuration for which it's an optional feature), and it doesn't seem useful for the libc.so.6 output to call out a few features like that. This patch removes the non-add-on Banner files, updating contrib.texi where they noted contributions not otherwise mentioned there. Tested for x86_64. * crypt/Banner: Remove file. * nptl/Banner: Likewise. * resolv/Banner: Likewise. * soft-fp/Banner: Likewise. * nptl/Makefile ($(objpfx)banner.h): Remove rule. ($(objpfx)version.d): Remove dependency on banner.h. ($(objpfx)version.os): Likewise. * nptl/version.c (banner): Do not include banner.h. * manual/contrib.texi: Update entries for Richard Henderson, Jakub Jelinek and BIND code.
2017-09-01Remove Roland McGrath/Ulrich Drepper et al. from DSO bannerH.J. Lu
* csu/version.c (banner): Remove "by Roland McGrath et al.". * nptl/Banner: Remove "by Ulrich Drepper et al.".
2017-09-01Move all old ChangeLogs to a top-level ChangeLog.old directory.Zack Weinberg
2017-08-31nptl: Remove internal_function attributeFlorian Weimer
2017-08-30Do not scale NPTL tests with available number of CPUsFlorian Weimer
On very large multi-processor systems, creating hundreds of threads runs into a test time out. The tests do not seem to benefit from massive over-scheduling.
2017-08-29ia64: Fix thread stack allocation permission set (BZ #21672)Adhemerval Zanella
This patch fixes ia64 failures on thread exit by madvise the required area taking in consideration its disjoing stacks (NEED_SEPARATE_REGISTER_STACK). Also the snippet that setup the madvise call to advertise kernel the area won't be used anymore in near future is reallocated in allocatestack.c (for consistency to put all stack management function in one place). Checked on x86_64-linux-gnu and i686-linux-gnu for sanity (since it is not expected code changes for architecture that do not define NEED_SEPARATE_REGISTER_STACK) and also got a report that it fixes ia64-linux-gnu failures from Sergei Trofimovich <slyfox@gentoo.org>. [BZ #21672] * nptl/allocatestack.c [_STACK_GROWS_DOWN] (setup_stack_prot): Set to use !NEED_SEPARATE_REGISTER_STACK as well. (advise_stack_range): New function. * nptl/pthread_create.c (START_THREAD_DEFN): Move logic to mark stack non required to advise_stack_range at allocatestack.c
2017-08-22Consolidate non cancellable nanosleep callAdhemerval Zanella
This patch consolidates all the non cancellable nanosleep calls to use the __nanosleep_nocancel identifier. For non cancellable targets it will be just a macro to call the default respective symbol while on Linux will be a internal one. Checked on x86_64-linux-gnu, x86_64-linux-gnu-x32, and i686-linux-gnu. * nptl/pthread_mutex_timedlock.c (__pthread_mutex_timedlock): Replace nanosleep_not_cancel with __nanosleep_nocancel. * sysdeps/generic/not-cancel.h (nanosleep_not_cancel): Remove macro. (__nanosleep_nocancel): New macro. * sysdeps/unix/sysv/linux/nanosleep.c (__nanosleep_nocancel): New function. * sysdeps/unix/sysv/linux/not-cancel.h (nanosleep_not_cancel): Remove macro. (__nanosleep_nocancel): New prototype.
2017-08-22Consolidate non cancellable pause callAdhemerval Zanella
This patch consolidates all the non cancellable pause calls to use the __pause_nocancel identifier. For non cancellable targets it will be just a macro to call the default respective symbol while on Linux will be a internal one. Checked on x86_64-linux-gnu, x86_64-linux-gnu-x32, and i686-linux-gnu. * nptl/pthread_mutex_lock.c (__pthread_mutex_lock_full): Replace pause_not_cancel with __pause_nocancel. * sysdeps/generic/not-cancel.h (pause_not_cancel): Remove macro. (__pause_nocancel): New macro. * sysdeps/unix/sysv/linux/not-cancel.h (pause_not_cancel): Remove macro. (__pause_nocancel): New prototype. * sysdeps/unix/sysv/linux/pause.c (__pause_nocancel): New function.
2017-08-13NPTL: Remove internal_function from stack marking functionsFlorian Weimer
These are called across DSO boundaries and therefore should use the ABI calling convention.
2017-08-09Add test for bug 21041Andreas Schwab
2017-08-08Don't use IFUNC resolver for longjmp or system in libpthread (bug 21041)Andreas Schwab
Unlike the vfork forwarder and like the fork forwarder as in bug 19861, there won't be a problem when the compiler does not turn this into a tail call.
2017-08-07Fix missing redirects in testsuite targetsAndreas Schwab
2017-07-29mutex: Fix robust mutex lock acquire (Bug 21778)Carlos O'Donell
65810f0ef05e8c9e333f17a44e77808b163ca298 fixed a robust mutex bug but introduced BZ 21778: if the CAS used to try to acquire a lock fails, the expected value is not updated, which breaks other cases in the loce acquisition loop. The fix is to simply update the expected value with the value returned by the CAS, which ensures that behavior is as if the first case with the CAS never happened (if the CAS fails). This is a regression introduced in the last release. Tested on x86_64, i686, ppc64, ppc64le, s390x, aarch64, armv7hl.
2017-07-28rwlock: Fix explicit hand-over (bug 21298)Carlos O'Donell
Without this fix, the rwlock can fail to execute the explicit hand-over in certain cases (e.g., empty critical sections that switch quickly between read and write phases). This can then lead to errors in how __wrphase_futex is accessed, which in turn can lead to deadlocks.
2017-07-15Fix guard alignment in allocate_stack when stack grows up.John David Anglin
2017-07-14Disable single thread optimization for open_memstreamSzabolcs Nagy
Single thread optimization is valid if at thread creation time the optimization can be disabled. This is in principle true for all stream objects that user code can access (and thus needs locking), using the same internal list as fflush(0) uses. However in glibc open_memstream is not on that list (BZ 21735) so the optimization has to be disabled. * libio/memstream.c (__open_memstream): Set _IO_FLAGS2_NEED_LOCK. * libio/wmemstream.c (open_wmemstream): Likewise. * nptl/tst-memstream.c: New.
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