where is the string literal allocated ? On the stack ?

[Michael]

>From C99 , 6.4.5,

"5. In translation phase 7, a byte or code of value zero is appended to 
each multibyte character sequence that results from a string literal or 
literals. The multibyte character sequence is then used to initialize an 
array of static storage duration and length just sufficient to contain 
the sequence. ..."



Therefore, the string literal must be stored on a "static storage", ie. 
it is invalid to put it on stack.



Mike





----- Original Message ----- 

From: "Matthew Woehlke" <mw_triad@users.sourceforge.net>
To: <gcc-help@gcc.gnu.org>
Sent: Friday, April 20, 2007 10:36 AM
Subject: Re: where is the string literal allocated ? On the stack ?


> Michael Gong wrote:
>> Though it's not related with gcc, could anyone help me with following 
>> question:
>>
>> Where is the string literal allocated ? Is it on the stack ?
>>
>> For example, where is "abc" allocated ?
>>
>> char * foo() {
>>    return "abc";
>> }
>
> It can't be on the stack in this case, because if it was, it would 
> cease to exist when foo() returns.
>
> AFAIK string literals all live in the read-only data segment (.text?).
>
> (Your prototype is wrong, btw; you are casting a const char * that 
> lives in read-only memory to a char *, which is just *ASKING* for your 
> program to SEGV at some point.)
>
> -- 
> Matthew
> <insert bad pun... on second thought, better not>
>
>