libsframe/testsuite/libsframe.decode/be-flipping.c

   1 /* be-flipping.c -- Test for handling different endianness in libsframe.
   2
   3    Copyright (C) 2022-2024 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include "config.h"
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <sys/stat.h>
  23
  24 #include "sframe-api.h"
  25
  26 /* DejaGnu should not use gnulib's vsnprintf replacement here.  */
  27 #undef vsnprintf
  28 #include <dejagnu.h>
  29
  30 /* SFrame info from the following source (1 fde 5 fres):
  31    static int cnt;
  32    extern void foo (void);
  33
  34    int bar()
  35    {
  36      cnt++;
  37      if (cnt == 3)
  38        foo();
  39     return (cnt);
  40   }
  41   gcc -mbig-endian -Wa,--gsframe -c -O3 t.c
  42   objcopy --dump-section .sframe=DATA-BE t.o
  43  */
  44 #define DATA    "DATA-BE"
  45
  46 int
  47 main (void)
  48 {
  49   sframe_decoder_ctx *dctx = NULL;
  50   uint32_t nfres, fsize;
  51   int32_t fstart;
  52   unsigned char finfo;
  53   int err = 0;
  54   FILE *fp;
  55   struct stat st;
  56   char *sf_buf;
  57   size_t sf_size;
  58
  59 #define TEST(name, cond)                                                      \
  60   do                                                                          \
  61     {                                                                         \
  62       if (cond)                                                               \
  63         pass (name);                                                          \
  64       else                                                                    \
  65         fail (name);                                                          \
  66     }                                                                         \
  67     while (0)
  68
  69   /* Test setup.  */
  70   fp = fopen (DATA, "r");
  71   if (fp == NULL)
  72     goto setup_fail;
  73   if (fstat (fileno (fp), &st) < 0)
  74     {
  75       perror ("fstat");
  76       fclose (fp);
  77       goto setup_fail;
  78     }
  79   sf_buf = malloc (st.st_size);
  80   if (sf_buf == NULL)
  81     {
  82       perror ("malloc");
  83       goto setup_fail;
  84     }
  85   sf_size = fread (sf_buf, 1, st.st_size, fp);
  86   fclose (fp);
  87   if (sf_size == 0)
  88     {
  89       fprintf (stderr, "Decode: Read buffer failed\n");
  90       goto setup_fail;
  91     }
  92
  93   /* Execute tests.  */
  94
  95   /* Call to sframe_decode will endian flip the input buffer (big-endian) if
  96      the host running the test is a little-endian system.  This endian-flipped
  97      copy of the buffer is kept internally in dctx.  */
  98   dctx = sframe_decode (sf_buf, sf_size, &err);
  99   TEST ("be-flipping: Decoder setup", dctx != NULL);
 100
 101   unsigned int fde_cnt = sframe_decoder_get_num_fidx (dctx);
 102   TEST ("be-flipping: Decoder FDE count", fde_cnt == 1);
 103
 104   err = sframe_decoder_get_funcdesc (dctx, 0, &nfres, &fsize, &fstart, &finfo);
 105   TEST ("be-flipping: Decoder get FDE", err == 0);
 106   TEST ("be-flipping: Decoder FRE count", nfres == 5);
 107
 108   free (sf_buf);
 109   sf_buf = NULL;
 110
 111   sframe_decoder_free (&dctx);
 112   return 0;
 113
 114 setup_fail:
 115   sframe_decoder_free (&dctx);
 116   fail ("be-flipping: Test setup");
 117   return 1;
 118 }