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| author | Jan Kratochvil <jan.kratochvil@redhat.com> | 2014-05-21 16:25:53 +0200 |
|---|---|---|
| committer | Jan Kratochvil <jan.kratochvil@redhat.com> | 2014-05-21 16:25:53 +0200 |
| commit | 5876f5032f60c45c4bd19e7ea7d0c14d0346b93e (patch) | |
| tree | 52545ba82ab64b43cdf7f0765d4764c39bdeac06 /gdb/target.h | |
| parent | 0256a6ac4b25d56da14cbbe3cda9977f9c7c13eb (diff) | |
| download | gdb-5876f5032f60c45c4bd19e7ea7d0c14d0346b93e.zip gdb-5876f5032f60c45c4bd19e7ea7d0c14d0346b93e.tar.gz gdb-5876f5032f60c45c4bd19e7ea7d0c14d0346b93e.tar.bz2 | |
Fix TLS access for -static -pthread
I have posted:
TLS variables access for -static -lpthread executables
https://sourceware.org/ml/libc-help/2014-03/msg00024.html
and the GDB patch below has been confirmed as OK for current glibcs.
Further work should be done for newer glibcs:
Improve TLS variables glibc compatibility
https://sourceware.org/bugzilla/show_bug.cgi?id=16954
Still the patch below implements the feature in a fully functional way backward
compatible with current glibcs, it depends on the following glibc source line:
csu/libc-tls.c
main_map->l_tls_modid = 1;
gdb/
2014-05-21 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix TLS access for -static -pthread.
* linux-thread-db.c (struct thread_db_info): Add td_thr_tlsbase_p.
(try_thread_db_load_1): Initialize it.
(thread_db_get_thread_local_address): Call it if LM is zero.
* target.c (target_translate_tls_address): Remove LM_ADDR zero check.
* target.h (struct target_ops) (to_get_thread_local_address): Add
load_module_addr comment.
gdb/gdbserver/
2014-05-21 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix TLS access for -static -pthread.
* gdbserver/thread-db.c (struct thread_db): Add td_thr_tlsbase_p.
(thread_db_get_tls_address): Call it if LOAD_MODULE is zero.
(thread_db_load_search, try_thread_db_load_1): Initialize it.
gdb/testsuite/
2014-05-21 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix TLS access for -static -pthread.
* gdb.threads/staticthreads.c <HAVE_TLS> (tlsvar): New.
<HAVE_TLS> (thread_function, main): Initialize it.
* gdb.threads/staticthreads.exp: Try gdb_compile_pthreads for $have_tls.
Add clean_restart.
<$have_tls != "">: Check TLSVAR.
Message-ID: <20140410115204.GB16411@host2.jankratochvil.net>
Diffstat (limited to 'gdb/target.h')
| -rw-r--r-- | gdb/target.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gdb/target.h b/gdb/target.h index 23a7566..9371529 100644 --- a/gdb/target.h +++ b/gdb/target.h @@ -605,7 +605,8 @@ struct target_ops thread-local storage for the thread PTID and the shared library or executable file given by OBJFILE. If that block of thread-local storage hasn't been allocated yet, this function - may return an error. */ + may return an error. LOAD_MODULE_ADDR may be zero for statically + linked multithreaded inferiors. */ CORE_ADDR (*to_get_thread_local_address) (struct target_ops *ops, ptid_t ptid, CORE_ADDR load_module_addr, |