在编译C文件后如何找出变量的地址 [英] how to find out the address of a variable after I compile the C file
问题描述
我有一个C程序。我编译了uisng gcc和avr-gcc。现在编译完成后，我想知道这两个变量的地址。
我的程序。我有什么选择可以用来找出它吗？
有什么方法可以找到它吗？有人告诉我这是可能的，但是我无法找到。
提前谢谢你，
priya
bi ** *******@gmail.com 写道：
我有一个C程序。我编译了uisng gcc和avr-gcc。现在编译之后，我想知道我的程序中两个变量的地址。我有什么选择可以用来找出它吗？是否有任何方法可以找到它？有人说这是可能的，但我无法找到。
听起来你正在寻找一个地图文件，检查编译器
文档。如果avr-gcc用于嵌入式目标，你应该能够生成一个，但是这里的细节不在这里。
-
Ian Collins。
bi *** ******@gmail.com 写道：
我有一个C程序。我编译了uisng gcc和avr-gcc。现在编译之后，我想知道我的程序中两个变量的地址。我有什么选择可以用来找出它吗？是否有任何方法可以找到它？有人说这是可能的，但我无法找到。
如果变量是除main之外的函数的本地变量，
然后它可能会或可能不会有相同的地址，每次在程序运行期间调用该函数时，
。
/ * BEGIN new.c * /
#include< stdio.h>
int main（无效）
{
double x;
printf（" x的地址是％p \ n"，（void *）& x） ;
返回0;
}
/ * END new.c * /
- -
pete
bi ********* @ gmail.com 写道：
我有一个C程序。我编译了uisng gcc和avr-gcc。现在编译之后，我想知道我的程序中两个变量的地址。我有什么选择可以用来找出它吗？是否有任何方法可以找到它？有人说这是可能的，但我无法找到。
如果你想从程序中显示一个变量的地址你
可以使用％p作为printf格式，例如printf（" Address var1 =％p，
var2 =％p"& v1，& v2）; （其中v1和v2是你的变量）。
如果你想在编译的
程序中找到变量的地址，你可能会遇到问题。考虑递归
函数的情况。每次递归调用都会在不同的
地址创建局部变量。
-
Ioan - Ciprian Tandau
tandau _at_ freeshell _dot_ org（希望现在还不算太晚）
（......它还能运作......）
Hi,
I have a C program. I have compiled it uisng gcc and also avr-gcc. Now
after compiling, I want to know the addresses of the two variables in
my program. Is there any options that I can use to find that out? Is
there any way at all to find that out? Someone told that it was
possible but I am not able to find out.
Thank you in advance,
priya
bi*********@gmail.com wrote:Hi,
I have a C program. I have compiled it uisng gcc and also avr-gcc. Now
after compiling, I want to know the addresses of the two variables in
my program. Is there any options that I can use to find that out? Is
there any way at all to find that out? Someone told that it was
possible but I am not able to find out.
Sounds like you are looking for a map file, check the compiler
documentation. If avr-gcc is for embedded targets, you should be able
to generate one, but the details are off topic here.
--
Ian Collins.
bi*********@gmail.com wrote:
Hi,
I have a C program. I have compiled it uisng gcc and also avr-gcc. Now
after compiling, I want to know the addresses of the two variables in
my program. Is there any options that I can use to find that out? Is
there any way at all to find that out? Someone told that it was
possible but I am not able to find out.
If a variable is local to a function other than main,
then it may or may not have the same address,
each time the function is called during the run of the program.
/* BEGIN new.c */
#include <stdio.h>
int main(void)
{
double x;
printf("The address of x is %p\n", (void *)&x);
return 0;
}
/* END new.c */
--
pete
bi*********@gmail.com wrote:Hi,
I have a C program. I have compiled it uisng gcc and also avr-gcc. Now
after compiling, I want to know the addresses of the two variables in
my program. Is there any options that I can use to find that out? Is
there any way at all to find that out? Someone told that it was
possible but I am not able to find out.
If you want to display the adress of a variable from the program you
can use %p for printf format, e.g. printf("Address var1=%p,
var2=%p",&v1, &v2); (where v1 and v2 are your variables).
If you want to find the address of the variables in the compiled
program you may have a problem. Consider the case of a recursive
function. The local variables are going to be created at different
addresses with each recursive call.
--
Ioan - Ciprian Tandau
tandau _at_ freeshell _dot_ org (hope it''s not too late)
(... and that it still works...)
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