gdb/unittests/search-memory-selftests.c

   1 /* Self tests for simple_search_memory for GDB, the GNU debugger.
   2
   3    Copyright (C) 2020-2022 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "gdbsupport/common-defs.h"
  21 #include "gdbsupport/selftest.h"
  22 #include "gdbsupport/search.h"
  23
  24 namespace selftests {
  25 namespace search_memory_tests {
  26
  27 static void
  28 run_tests ()
  29 {
  30   size_t size = 2 * SEARCH_CHUNK_SIZE + 1;
  31
  32   std::vector<gdb_byte> data (size);
  33   data[size - 1] = 'x';
  34
  35   bool read_fully = false;
  36   bool read_off_end = false;
  37   auto read_memory = [&] (CORE_ADDR from, gdb_byte *out, size_t len)
  38     {
  39       if (from + len > data.size ())
  40         read_off_end = true;
  41       else
  42         memcpy (out, &data[from], len);
  43       if (from + len == data.size ())
  44         read_fully = true;
  45       return true;
  46     };
  47
  48   gdb_byte pattern = 'x';
  49
  50   CORE_ADDR addr = 0;
  51   int result = simple_search_memory (read_memory, 0, data.size (),
  52                                      &pattern, 1, &addr);
  53   /* In this case we don't care if read_fully was set or not.  */
  54   SELF_CHECK (result == 1);
  55   SELF_CHECK (!read_off_end);
  56   SELF_CHECK (addr == size - 1);
  57
  58   addr = 0;
  59   read_fully = false;
  60   read_off_end = false;
  61   pattern = 'q';
  62   result = simple_search_memory (read_memory, 0, data.size (),
  63                                  &pattern, 1, &addr);
  64   SELF_CHECK (result == 0);
  65   SELF_CHECK (!read_off_end);
  66   SELF_CHECK (read_fully);
  67   SELF_CHECK (addr == 0);
  68
  69   /* Setup from PR gdb/17756.  */
  70   size = 0x7bb00;
  71   data = std::vector<gdb_byte> (size);
  72   const CORE_ADDR base_addr = 0x08370000;
  73   const gdb_byte wpattern[] = { 0x90, 0x8b, 0x98, 0x8 };
  74   const CORE_ADDR found_addr = 0x837bac8;
  75   memcpy (&data[found_addr - base_addr], wpattern, sizeof (wpattern));
  76
  77   auto read_memory_2 = [&] (CORE_ADDR from, gdb_byte *out, size_t len)
  78     {
  79       memcpy (out, &data[from - base_addr], len);
  80       return true;
  81     };
  82
  83   result = simple_search_memory (read_memory_2, base_addr, data.size (),
  84                                  wpattern, sizeof (wpattern), &addr);
  85   SELF_CHECK (result == 1);
  86   SELF_CHECK (addr == found_addr);
  87 }
  88
  89 } /* namespace search_memory_tests */
  90 } /* namespace selftests */
  91
  92
  93 void _initialize_search_memory_selftests ();
  94 void
  95 _initialize_search_memory_selftests ()
  96 {
  97   selftests::register_test ("search_memory",
  98                             selftests::search_memory_tests::run_tests);
  99 }