Subject:
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Re: detecting memory leaks
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Sat, 13 Jul 2002 00:03:24 GMT
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Viewed:
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1986 times
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In case anyone attempts to use the mm_defrag() posted previously... you will
need the following update to mm_try_join()
//! check for free blocks after this one and join them if possible
/* \param ptr pointer to size field of current block
\return size of block
*/
size_t mm_try_join(size_t *ptr) {
size_t *next = ptr + *ptr + 1;
size_t increase = 0;
while(*next == MM_FREE && next>=&mm_start) {
increase += *(next+1);
increase += MM_HEADER_SIZE;
next = next_block(next);
}
return (*ptr) += increase;
}
//////
Notice the "&& next>=&mm_start" for the while loop compare. This will keep
mm_try_join() from attempting to join past the end of memory 8-)
//////
<snip>
> That reminds me, there was a bug in mm.c concerning mm_try_join() • attempting
> to join the last block of memory. I will try to find that solution as • well
> (so it can be included)
>
>
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Message has 1 Reply:
 | | Re: detecting memory leaks
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| I've been experimenting with memory leak detection in the wake of recent discussions, and have some additional thoughts, including a potential kernel patch issue. This msg is a bit long, appologies. The proposed method of checking for memory leaks (...) (22 years ago, 16-Jul-02, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Re: detecting memory leaks
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| Jason, Excellent points! I like where this is going. "Jason Clark" wrote <snip> (...) See below. (...) then (...) Yes, it uses mm_try_join() --- here it is: //! defragment free blocks /*! use mm_try_join on each free block of memory */ void (...) (22 years ago, 12-Jul-02, to lugnet.robotics.rcx.legos)
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