我工作在C的国际象棋引擎运行Valgrind的时候,我发现了内存泄漏:无法理解Valgrind的的错误信息
==18455== 64 bytes in 1 blocks are definitely lost in loss record 9 of 199
==18455== at 0x4C2B6CD: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==18455== by 0x40451C: copyGame (Chess.c:1093)
==18455== by 0x401356: addToList (Chess.c:213)
==18455== by 0x4014A0: register_move (Chess.c:245)
==18455== by 0x4019C3: getPawnMoves (Chess.c:300)
==18455== by 0x40119A: getSquareMoves (Chess.c:169)
==18455== by 0x404F88: evaluate (MiniMax.c:69)
==18455== by 0x405D93: alphaBetaMax (MiniMax.c:290)
==18455== by 0x405CF6: alphaBetaMax (MiniMax.c:274)
==18455== by 0x405CF6: alphaBetaMax (MiniMax.c:274)
==18455== by 0x405EC1: getBestMove (MiniMax.c:307)
==18455== by 0x403933: computerTurn (Chess.c:852)
这里发生的事情是这样的:在电脑转,后minimax算法达到深度0,它被称为评估。评估查看当前玩家的所有可能动作并将其添加到列表中。要检查是否可以将移动添加到列表中,移动将在当前游戏的副本上执行,并且程序会检查当前玩家是否未被检查(合法移动)。然后移动可以被添加。
由此我得到的似乎是与copyGame一个问题:
void copyGame(game_t game, game_t *copy)
{
int i = 0, j = 0;
copy->data = (int*)malloc(sizeof(int)* 16);
checkMalloc(copy->data);
copy->board = (board_t)malloc(sizeof(char*)*BOARD_SIZE); // board_t is char**
checkMalloc(copy->board);
for (i = 0; i<BOARD_SIZE; i++)
{
copy->board[i] = (char*)malloc(sizeof(char)*BOARD_SIZE);
checkMalloc(copy->board[i]);
}
for (i = 0; i<16; i++)
{
copy->data[i] = game.data[i]; //data contains additional information about the game
}
for (i = 0; i<BOARD_SIZE; i++)
for (j = 0; j<BOARD_SIZE; j++)
{
copy->board[i][j] = game.board[i][j];
}
}
这里是调用copyGame功能:
move_t* addToList(game_t game, move_t* list, move_t * move, int color)
{
int kx, ky;
game_t copy;
copyGame(game, ©);
makeMove(©, *move);
kx = copy.data[2];
ky = copy.data[3];
if (color)
{
kx = copy.data[0];
ky = copy.data[1];
}
if (isAttacked(©, kx, ky, color) == 0) // if curplayer's king isn't attacked
{
move->next = list;
list = move;
}
else
{
free(move);
}
freeGame(copy);
return list;
}
但我怀疑问题可能与freeGame :
void freeGame(game_t game)
{
int i = 0;
for (i = 0; i<BOARD_SIZE; i++)
{
free(game.board[i]);
}
free(game.data);
}
我只是不明白Valgrind提出的错误,而wo如果有更多C经验的人可以帮忙,我很感激。谢谢阅读。
Valgrind说有问题的错误在'Chess.c'的第1093行。 'copyGame'中的哪个'malloc'在该行? – jlahd 2014-09-29 11:32:52
另外一个问题可能会更好(因为这两个问题并不相关)。但后续问题的主要问题是,您根本没有粘贴实际的错误消息,只有位置和堆栈跟踪... – jlahd 2014-09-29 12:34:45