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71   const struct tailcall_cache *cache = (const struct tailcall_cache *) arg;
73   return htab_hash_pointer (cache->next_bottom_frame);
94   struct tailcall_cache *cache = XCNEW (struct tailcall_cache);
97   cache->next_bottom_frame = next_bottom_frame.get ();
98   cache->refc = 1;
100   slot = htab_find_slot (cache_htab, cache, INSERT);
102   *slot = cache;
104   return cache;
107 /* Create new reference to CACHE.  */
110 cache_ref (struct tailcall_cache *cache)
112   gdb_assert (cache->refc > 0);
114   cache->refc++;
117 /* Drop reference to CACHE, possibly fully freeing it and unregistering it from
121 cache_unref (struct tailcall_cache *cache)
123   gdb_assert (cache->refc > 0);
125   if (!--cache->refc)
127       gdb_assert (htab_find_slot (cache_htab, cache, NO_INSERT) != NULL);
128       htab_remove_elt (cache_htab, cache);
130       xfree (cache->chain);
131       xfree (cache);
150   struct tailcall_cache *cache;
167   cache = (struct tailcall_cache *) *slot;
168   gdb_assert (cache != NULL);
169   return cache;
172 /* Number of virtual frames between THIS_FRAME and CACHE->NEXT_BOTTOM_FRAME.
173    If THIS_FRAME is CACHE-> NEXT_BOTTOM_FRAME return -1.  */
177 		      struct tailcall_cache *cache)
180 		- frame_relative_level (frame_info_ptr (cache->next_bottom_frame)) - 1);
216   struct tailcall_cache *cache = (struct tailcall_cache *) *this_cache;
226   (*this_id).artificial_depth = (cache->chain_levels
227 				 - existing_next_levels (this_frame, cache));
232    CACHE.  */
235 pretend_pc (const frame_info_ptr &this_frame, struct tailcall_cache *cache)
237   int next_levels = existing_next_levels (this_frame, cache);
238   struct call_site_chain *chain = cache->chain;
258   return cache->prev_pc;
271   struct tailcall_cache *cache = (struct tailcall_cache *) *tailcall_cachep;
275     addr = pretend_pc (this_frame, cache);
276   else if (cache->prev_sp_p && regnum == gdbarch_sp_regnum (this_gdbarch))
278       int next_levels = existing_next_levels (this_frame, cache);
280       if (next_levels == cache->chain_levels - 1)
281 	addr = cache->prev_sp;
283 	addr = dwarf2_frame_cfa (this_frame) - cache->entry_cfa_sp_offset;
300   struct tailcall_cache *cache = (struct tailcall_cache *) *this_cache;
303   gdb_assert (this_frame != cache->next_bottom_frame);
323   struct tailcall_cache *cache;
333   cache = cache_find (next_frame);
334   if (cache == NULL)
337   cache_ref (cache);
339   next_levels = existing_next_levels (this_frame, cache);
343   gdb_assert (next_levels <= cache->chain_levels);
345   if (next_levels == cache->chain_levels)
347       cache_unref (cache);
351   *this_cache = cache;
375   struct tailcall_cache *cache;
431   cache = cache_new_ref1 (this_frame);
432   *tailcall_cachep = cache;
433   cache->chain = chain.release ();
434   cache->prev_pc = prev_pc;
435   cache->chain_levels = pretended_chain_levels (cache->chain);
436   cache->prev_sp_p = prev_sp_p;
437   if (cache->prev_sp_p)
439       cache->prev_sp = prev_sp;
440       cache->entry_cfa_sp_offset = *entry_cfa_sp_offsetp;
442   gdb_assert (cache->chain_levels > 0);
452   struct tailcall_cache *cache = (struct tailcall_cache *) this_cache;
454   cache_unref (cache);
464   struct tailcall_cache *cache = (struct tailcall_cache *) *this_prologue_cache;
466   return get_frame_arch (frame_info_ptr (cache->next_bottom_frame));