如何比较GDB中存储的字符串变量? [英] How to compare a stored string variable in GDB?
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问题描述
gdb $ print $ x
$ 1 = 0x1001009b0hello
但与
的比较
如果$ x ==hello
不起作用。
解决方案
(gdb)p strcmp ,你好)== 0
$ 1 = 1
如果你不幸没有程序运行(执行一个核心文件或某些东西),如果您的gdb足够新建python,您可以执行以下操作:
(gdb)py print cmp(gdb.execute(output $ x,to_string = True).strip(''),hello)== 0
True
或:
(gdb)define strcmp
> py print cmp(gdb.execute(output $ arg0,to_string = True).strip(''),$ arg1)
> end
(gdb)strcmp $ xhello
0
I have a variable called x in GDB which I want to compare against a string.
gdb $ print $x
$1 = 0x1001009b0 "hello"
but a comparsion with
if $x == "hello"
doesn't work.
解决方案
(gdb) p strcmp($x, "hello") == 0
$1 = 1
If you are unfortunate enough to not have the program running (executing a core file or something), you can do something to the effect of the following if your gdb is new enough to have python:
(gdb) py print cmp(gdb.execute("output $x", to_string=True).strip('"'), "hello") == 0
True
or:
(gdb) define strcmp
>py print cmp(gdb.execute("output $arg0", to_string=True).strip('"'), $arg1)
>end
(gdb) strcmp $x "hello"
0
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