GDB的auto display的用法

在gdb当中，display的功能很不错的

下面是gdb手册上的定义：

display expr

Add the expression expr to the list of expressions to display each time your program stops. See Expressions.

display does not repeat if you press <RET> again after using it.

display/fmt expr

For fmt specifying only a display format and not a size or count, add the expression expr to the auto-display list but arrange to display it each time in the specified format fmt. See Output Formats.

display/fmt addr

For fmt `i' or `s', or including a unit-size or a number of units, add the expression addr as a memory address to be examined each time your program stops. Examining means in effect doing `x/fmt addr'. See Examining Memory.

这里讲一下显示数组：

假设定义了一个数组

char array[4];

那么在gdb当中就可以用如下的方式：

display /x *array@4

gdb就会吧array数组以十六进制显示了！～