Home | History | Annotate | Download | only in mi
      1 /* libunwind - a platform-independent unwind library
      2    Copyright (C) 2001-2005 Hewlett-Packard Co
      3 	Contributed by David Mosberger-Tang <davidm (at) hpl.hp.com>
      4 
      5 This file is part of libunwind.
      6 
      7 Permission is hereby granted, free of charge, to any person obtaining
      8 a copy of this software and associated documentation files (the
      9 "Software"), to deal in the Software without restriction, including
     10 without limitation the rights to use, copy, modify, merge, publish,
     11 distribute, sublicense, and/or sell copies of the Software, and to
     12 permit persons to whom the Software is furnished to do so, subject to
     13 the following conditions:
     14 
     15 The above copyright notice and this permission notice shall be
     16 included in all copies or substantial portions of the Software.
     17 
     18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
     25 
     26 #include "libunwind_i.h"
     27 #include "remote.h"
     28 
     29 static inline int
     30 intern_string (unw_addr_space_t as, unw_accessors_t *a,
     31 	       unw_word_t addr, char *buf, size_t buf_len, void *arg)
     32 {
     33   size_t i;
     34   int ret;
     35 
     36   for (i = 0; i < buf_len; ++i)
     37     {
     38       if ((ret = fetch8 (as, a, &addr, (int8_t *) buf + i, arg)) < 0)
     39 	return ret;
     40 
     41       if (buf[i] == '\0')
     42 	return 0;		/* copied full string; return success */
     43     }
     44   buf[buf_len - 1] = '\0';	/* ensure string is NUL terminated */
     45   return -UNW_ENOMEM;
     46 }
     47 
     48 static inline int
     49 get_proc_name (unw_addr_space_t as, unw_word_t ip,
     50 	       char *buf, size_t buf_len, unw_word_t *offp, void *arg)
     51 {
     52   unw_accessors_t *a = unw_get_accessors (as);
     53   unw_proc_info_t pi;
     54   int ret;
     55 
     56   buf[0] = '\0';	/* always return a valid string, even if it's empty */
     57 
     58   ret = unwi_find_dynamic_proc_info (as, ip, &pi, 1, arg);
     59   if (ret == 0)
     60     {
     61       unw_dyn_info_t *di = pi.unwind_info;
     62 
     63       if (offp)
     64 	*offp = ip - pi.start_ip;
     65 
     66       switch (di->format)
     67 	{
     68 	case UNW_INFO_FORMAT_DYNAMIC:
     69 	  ret = intern_string (as, a, di->u.pi.name_ptr, buf, buf_len, arg);
     70 	  break;
     71 
     72 	case UNW_INFO_FORMAT_TABLE:
     73 	case UNW_INFO_FORMAT_REMOTE_TABLE:
     74 	  /* XXX should we create a fake name, e.g.: "tablenameN",
     75 	     where N is the index of the function in the table??? */
     76 	  ret = -UNW_ENOINFO;
     77 	  break;
     78 
     79 	default:
     80 	  ret = -UNW_EINVAL;
     81 	  break;
     82 	}
     83       unwi_put_dynamic_unwind_info (as, &pi, arg);
     84       return ret;
     85     }
     86 
     87   if (ret != -UNW_ENOINFO)
     88     return ret;
     89 
     90   /* not a dynamic procedure, try to lookup static procedure name: */
     91 
     92   if (a->get_proc_name)
     93     return (*a->get_proc_name) (as, ip, buf, buf_len, offp, arg);
     94 
     95   return -UNW_ENOINFO;
     96 }
     97 
     98 PROTECTED int
     99 unw_get_proc_name (unw_cursor_t *cursor, char *buf, size_t buf_len,
    100 		   unw_word_t *offp)
    101 {
    102   struct cursor *c = (struct cursor *) cursor;
    103 
    104   return get_proc_name (tdep_get_as (c), tdep_get_ip (c), buf, buf_len, offp,
    105 			tdep_get_as_arg (c));
    106 }
    107 
    108 /* ANDROID support update. */
    109 PROTECTED int
    110 unw_get_proc_name_by_ip (unw_addr_space_t as, unw_word_t ip, char *buf,
    111 			 size_t buf_len, unw_word_t *offp, void *as_arg)
    112 {
    113   return get_proc_name (as, ip, buf, buf_len, offp, as_arg);
    114 }
    115 /* End of ANDROID update. */
    116