gdb/unittests/search-memory-selftests.c

   1 /* Self tests for simple_search_memory for GDB, the GNU debugger.
   2
   3    Copyright (C) 2020-2024 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/selftest.h"
  21 #include "gdbsupport/search.h"
  22
  23 namespace selftests {
  24 namespace search_memory_tests {
  25
  26 static void
  27 run_tests ()
  28 {
  29   size_t size = 2 * SEARCH_CHUNK_SIZE + 1;
  30
  31   std::vector<gdb_byte> data (size);
  32   data[size - 1] = 'x';
  33
  34   bool read_fully = false;
  35   bool read_off_end = false;
  36   auto read_memory = [&] (CORE_ADDR from, gdb_byte *out, size_t len)
  37     {
  38       if (from + len > data.size ())
  39         read_off_end = true;
  40       else
  41         memcpy (out, &data[from], len);
  42       if (from + len == data.size ())
  43         read_fully = true;
  44       return true;
  45     };
  46
  47   gdb_byte pattern = 'x';
  48
  49   CORE_ADDR addr = 0;
  50   int result = simple_search_memory (read_memory, 0, data.size (),
  51                                      &pattern, 1, &addr);
  52   /* In this case we don't care if read_fully was set or not.  */
  53   SELF_CHECK (result == 1);
  54   SELF_CHECK (!read_off_end);
  55   SELF_CHECK (addr == size - 1);
  56
  57   addr = 0;
  58   read_fully = false;
  59   read_off_end = false;
  60   pattern = 'q';
  61   result = simple_search_memory (read_memory, 0, data.size (),
  62                                  &pattern, 1, &addr);
  63   SELF_CHECK (result == 0);
  64   SELF_CHECK (!read_off_end);
  65   SELF_CHECK (read_fully);
  66   SELF_CHECK (addr == 0);
  67
  68   /* Setup from PR gdb/17756.  */
  69   size = 0x7bb00;
  70   data = std::vector<gdb_byte> (size);
  71   const CORE_ADDR base_addr = 0x08370000;
  72   const gdb_byte wpattern[] = { 0x90, 0x8b, 0x98, 0x8 };
  73   const CORE_ADDR found_addr = 0x837bac8;
  74   memcpy (&data[found_addr - base_addr], wpattern, sizeof (wpattern));
  75
  76   auto read_memory_2 = [&] (CORE_ADDR from, gdb_byte *out, size_t len)
  77     {
  78       memcpy (out, &data[from - base_addr], len);
  79       return true;
  80     };
  81
  82   result = simple_search_memory (read_memory_2, base_addr, data.size (),
  83                                  wpattern, sizeof (wpattern), &addr);
  84   SELF_CHECK (result == 1);
  85   SELF_CHECK (addr == found_addr);
  86 }
  87
  88 } /* namespace search_memory_tests */
  89 } /* namespace selftests */
  90
  91
  92 void _initialize_search_memory_selftests ();
  93 void
  94 _initialize_search_memory_selftests ()
  95 {
  96   selftests::register_test ("search_memory",
  97                             selftests::search_memory_tests::run_tests);
  98 }