[BZ#17090/17620/17621]: fix DTV race, assert, and DTV_SURPLUS Static TLS limit

[Alexandre Oliva]

On Dec  9, 2014, Alexandre Oliva <aoliva@redhat.com> wrote:

> On Nov 21, 2014, Alexandre Oliva <aoliva@redhat.com> wrote:
>> No regressions on x86_64-linux-gnu.  Ok to install?


>> for  ChangeLog

>> [BZ #17090]
>> [BZ #17620]
>> [BZ #17621]
>> [BZ #17628]
>> * NEWS: Update.
>> * elf/dl-tls.c (_dl_update_slotinfo): Clean up outdated DTV
>> entries with Static TLS too.
>> (tls_get_addr_tail): Update to glibc_likely/unlikely.  Move
>> Static TLS DTV entry set up from...
>> (_dl_allocate_tls_init): ... here (fix modid assertion), ...
>> * elf/dl-reloc.c (_dl_nothread_init_static_tls): ... here...
>> * nptl/allocatestack.c (init_one_static_tls): ... and here...
>> * elf/dlopen.c (dl_open_worker): Drop l_tls_modid upper bound
>> for Static TLS.
>> * nptl_db/db_info.c: Include ldsodefs.h.
>> (rtld_global, dtv_slotinfo_list, dtv_slotinfo): New typedefs.
>> * nptl_db/structs.def (DB_RTLD_VARIABLE): New macro.
>> (DB_MAIN_VARIABLE, DB_RTLD_GLOBAL_FIELD): Likewise.
>> (link_map::l_tls_offset): New struct field.
>> (dtv_t::counter): Likewise.
>> (rtld_global): New struct.
>> (_rtld_global): New rtld variable.
>> (dl_tls_dtv_slotinfo_list): New rtld global field.
>> (dtv_slotinfo_list): New struct.
>> (dtv_slotinfo): Likewise.
>> * nptl_db/td_symbol_list.c: Drop gnu/lib-names.h include.
>> (td_lookup): Rename to...
>> (td_mod_lookup): ... this.  Use new mod parameter instead of
>> LIBPTHREAD_SO.
>> * nptl_db/td_thr_tlsbase.c: Include link.h.
>> (dtv_slotinfo_list, dtv_slotinfo): New functions.
>> (td_thr_tlsbase): Check DTV generation.  Compute Static TLS
>> addresses even if the DTV is out of date or missing them.
>> * nptl_db/fetch-value.c (_td_locate_field): Do not refuse to
>> index zero-length arrays.
>> * nptl_db/thread_dbP.h: Include gnu/lib-names.h.
>> (td_lookup): Make it a macro implemented in terms of...
>> (td_mod_lookup): ... this declaration.
>> * nptl_db/db-symbols.awk (DB_RTLD_VARIABLE): Override.
>> (DB_MAIN_VARIABLE): Likewise.

> Ping?
> https://sourceware.org/ml/libc-alpha/2014-11/msg00590.html

Ping?

-- 
Alexandre Oliva, freedom fighter    http://FSFLA.org/~lxoliva/
You must be the change you wish to see in the world. -- Gandhi
Be Free! -- http://FSFLA.org/   FSF Latin America board member
Free Software Evangelist|Red Hat Brasil GNU Toolchain Engineer