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nptl: Export libthread_db-used symbols under GLIBC_PRIVATE
This allows distributions to strip debugging information from libc.so.6 without impacting the debugging experience. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer
parent
b369cc4e9c
commit
fef400a2f9
@ -403,10 +403,14 @@ libc {
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__nptl_deallocate_tsd;
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__nptl_death_event;
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__nptl_free_tcb;
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__nptl_last_event;
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__nptl_nthreads;
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__nptl_rtld_global;
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__nptl_setxid_sighandler;
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__nptl_stack_list_add;
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__nptl_stack_list_del;
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__nptl_threads_events;
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__nptl_version;
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__pthread_attr_copy;
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__pthread_attr_destroy;
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__pthread_attr_init;
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@ -430,6 +434,60 @@ libc {
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__pthread_unwind;
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__sched_fifo_max_prio;
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__sched_fifo_min_prio;
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_thread_db___nptl_last_event;
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_thread_db___nptl_nthreads;
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_thread_db___nptl_rtld_global;
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_thread_db___pthread_keys;
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_thread_db_const_thread_area;
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_thread_db_dtv_dtv;
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_thread_db_dtv_slotinfo_gen;
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_thread_db_dtv_slotinfo_list_len;
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_thread_db_dtv_slotinfo_list_next;
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_thread_db_dtv_slotinfo_list_slotinfo;
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_thread_db_dtv_slotinfo_map;
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_thread_db_dtv_t_counter;
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_thread_db_dtv_t_pointer_val;
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_thread_db_link_map_l_tls_modid;
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_thread_db_link_map_l_tls_offset;
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_thread_db_list_t_next;
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_thread_db_list_t_prev;
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_thread_db_pthread_cancelhandling;
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_thread_db_pthread_dtvp;
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_thread_db_pthread_eventbuf;
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_thread_db_pthread_eventbuf_eventmask;
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_thread_db_pthread_eventbuf_eventmask_event_bits;
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_thread_db_pthread_key_data_data;
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_thread_db_pthread_key_data_level2_data;
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_thread_db_pthread_key_data_seq;
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_thread_db_pthread_key_struct_destr;
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_thread_db_pthread_key_struct_seq;
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_thread_db_pthread_list;
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_thread_db_pthread_nextevent;
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_thread_db_pthread_report_events;
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_thread_db_pthread_schedparam_sched_priority;
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_thread_db_pthread_schedpolicy;
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_thread_db_pthread_specific;
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_thread_db_pthread_start_routine;
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_thread_db_pthread_tid;
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_thread_db_register32;
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_thread_db_register32_thread_area;
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_thread_db_register64;
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_thread_db_register64_thread_area;
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_thread_db_rtld_global__dl_stack_used;
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_thread_db_rtld_global__dl_stack_user;
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_thread_db_rtld_global__dl_tls_dtv_slotinfo_list;
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_thread_db_sizeof_dtv_slotinfo;
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_thread_db_sizeof_dtv_slotinfo_list;
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_thread_db_sizeof_list_t;
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_thread_db_sizeof_pthread;
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_thread_db_sizeof_pthread_key_data;
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_thread_db_sizeof_pthread_key_data_level2;
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_thread_db_sizeof_pthread_key_struct;
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_thread_db_sizeof_td_eventbuf_t;
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_thread_db_sizeof_td_thr_events_t;
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_thread_db_td_eventbuf_t_eventdata;
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_thread_db_td_eventbuf_t_eventnum;
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_thread_db_td_thr_events_t_event_bits;
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}
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}
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@ -43,21 +43,24 @@
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/* Globally enabled events. */
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static td_thr_events_t __nptl_threads_events __attribute_used__;
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td_thr_events_t __nptl_threads_events __attribute__ ((nocommon));
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libc_hidden_proto (__nptl_threads_events)
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libc_hidden_data_def (__nptl_threads_events)
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/* Pointer to descriptor with the last event. */
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static struct pthread *__nptl_last_event __attribute_used__;
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struct pthread *__nptl_last_event __attribute__ ((nocommon));
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libc_hidden_proto (__nptl_last_event)
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libc_hidden_data_def (__nptl_last_event)
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#ifdef SHARED
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/* This variable is used to access _rtld_global from libthread_db. If
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GDB loads libpthread before ld.so, it is not possible to resolve
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_rtld_global directly during libpthread initialization. */
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static struct rtld_global *__nptl_rtld_global __attribute_used__
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= &_rtld_global;
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struct rtld_global *__nptl_rtld_global = &_rtld_global;
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#endif
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/* Version of the library, used in libthread_db to detect mismatches. */
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static const char nptl_version[] __attribute_used__ = VERSION;
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const char __nptl_version[] = VERSION;
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/* This performs the initialization necessary when going from
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single-threaded to multi-threaded mode for the first time. */
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@ -55,7 +55,7 @@ include ../Rules
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$(objpfx)db-symbols.out: $(objpfx)db-symbols.v.i \
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$(common-objpfx)libc.so
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LC_ALL=C $(READELF) -W -s $(filter %.so,$^) | $(AWK) -f $< > $@; \
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LC_ALL=C $(READELF) -W -D -s $(filter %.so,$^) | $(AWK) -f $< > $@; \
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$(evaluate-test)
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$(objpfx)db-symbols.v.i: db-symbols.awk
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@ -1,4 +1,4 @@
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# This script processes the output of 'readelf -W -s' on the libpthread.so
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# This script processes the output of 'readelf -W -D -s' on the libc.so
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# we've just built. It checks for all the symbols used in td_symbol_list.
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BEGIN {
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@ -12,7 +12,7 @@ BEGIN {
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in_symtab = 0;
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}
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/Symbol table '.symtab'/ { in_symtab=1; next }
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/Symbol table for image/ { in_symtab=1; next }
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NF == 0 { in_symtab=0; next }
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!in_symtab { next }
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@ -23,6 +23,7 @@ END {
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status = 0;
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for (s in required) {
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s = s "@@GLIBC_PRIVATE"
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if (s in seen) print s, "ok";
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else {
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status = 1;
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@ -32,6 +33,7 @@ END {
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any = "";
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for (s in th_unique) {
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s = s "@@GLIBC_PRIVATE"
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if (s in seen) {
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any = s;
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break;
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