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      1 /* Convenience functions for handling DWARF descriptions of inline functions.
      2    Copyright (C) 2005,2006,2015 Red Hat, Inc.
      3    This file is part of elfutils.
      4 
      5    This file is free software; you can redistribute it and/or modify
      6    it under the terms of either
      7 
      8      * the GNU Lesser General Public License as published by the Free
      9        Software Foundation; either version 3 of the License, or (at
     10        your option) any later version
     11 
     12    or
     13 
     14      * the GNU General Public License as published by the Free
     15        Software Foundation; either version 2 of the License, or (at
     16        your option) any later version
     17 
     18    or both in parallel, as here.
     19 
     20    elfutils is distributed in the hope that it will be useful, but
     21    WITHOUT ANY WARRANTY; without even the implied warranty of
     22    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     23    General Public License for more details.
     24 
     25    You should have received copies of the GNU General Public License and
     26    the GNU Lesser General Public License along with this program.  If
     27    not, see <http://www.gnu.org/licenses/>.  */
     28 
     29 #ifdef HAVE_CONFIG_H
     30 # include <config.h>
     31 #endif
     32 
     33 #include "libdwP.h"
     34 #include <dwarf.h>
     35 
     36 struct visitor_info
     37 {
     38   void *die_addr;
     39   int (*callback) (Dwarf_Die *, void *);
     40   void *arg;
     41 };
     42 
     43 static int
     44 scope_visitor (unsigned int depth __attribute__ ((unused)),
     45 	       struct Dwarf_Die_Chain *die, void *arg)
     46 {
     47   struct visitor_info *const v = arg;
     48 
     49   if (INTUSE(dwarf_tag) (&die->die) != DW_TAG_inlined_subroutine)
     50     return DWARF_CB_OK;
     51 
     52   Dwarf_Attribute attr_mem;
     53   Dwarf_Attribute *attr = INTUSE(dwarf_attr) (&die->die, DW_AT_abstract_origin,
     54 					      &attr_mem);
     55   if (attr == NULL)
     56     return DWARF_CB_OK;
     57 
     58   Dwarf_Die origin_mem;
     59   Dwarf_Die *origin = INTUSE(dwarf_formref_die) (attr, &origin_mem);
     60   if (origin == NULL)
     61     return DWARF_CB_ABORT;
     62 
     63   if (origin->addr != v->die_addr)
     64     return DWARF_CB_OK;
     65 
     66   return (*v->callback) (&die->die, v->arg);
     67 }
     68 
     69 int
     70 dwarf_func_inline (Dwarf_Die *func)
     71 {
     72   Dwarf_Attribute attr_mem;
     73   Dwarf_Word val;
     74   if (INTUSE(dwarf_formudata) (INTUSE(dwarf_attr) (func, DW_AT_inline,
     75 						   &attr_mem),
     76 			       &val) == 0)
     77   switch (val)
     78     {
     79     case DW_INL_not_inlined:
     80       return 0;
     81 
     82     case DW_INL_declared_not_inlined:
     83       return -1;
     84 
     85     case DW_INL_inlined:
     86     case DW_INL_declared_inlined:
     87       return 1;
     88     }
     89 
     90   return 0;
     91 }
     92 
     93 int
     94 dwarf_func_inline_instances (Dwarf_Die *func,
     95 			     int (*callback) (Dwarf_Die *, void *),
     96 			     void *arg)
     97 {
     98   struct visitor_info v = { func->addr, callback, arg };
     99   struct Dwarf_Die_Chain cu = { .die = CUDIE (func->cu), .parent = NULL };
    100   return __libdw_visit_scopes (0, &cu, NULL, &scope_visitor, NULL, &v);
    101 }
    102