Re: Segmentation fault at malloc.c:4232
- From: Michael Schwendt <mschwendt@xxxxxxxxx>
- Date: Fri, 29 Feb 2008 23:57:53 +0100
On Sat, 1 Mar 2008 06:10:55 +0800, hanpingtian@xxxxxxxxx wrote:
I just found out when I comment out the line 27, which calls free() to
free the line got from
getline(), the program doesn't segmentation fault.
But the manual of getline() tells us to free the "*lineptr" when it is
NULL before call getline(). It's the situation in my program.
With this src.txt:
(x = 1)
1
it reports "double free or corruption" when doesn't comment line 27:
*** glibc detected *** ./compiler: double free or corruption (!prev): 0x08c0d2d8
Your theory is false, your code is broken. You really need to free()
the line buffer when it is allocated by getline(). But you call getline()
in a while-loop without resetting the line pointer to NULL. Here's the
fix:
--- compiler.c~ 2008-02-29 07:06:46.000000000 +0100
+++ compiler.c 2008-02-29 23:55:41.000000000 +0100
@@ -25,6 +25,7 @@
}
free(line);
+ line = NULL;
STACKfree();
}
--
fedora-list mailing list
fedora-list@xxxxxxxxxx
To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
- References:
- Segmentation fault at malloc.c:4232
- From: hanpingtian
- Re: Segmentation fault at malloc.c:4232
- From: Chris Jones
- Re: Segmentation fault at malloc.c:4232
- From: hanpingtian
- Re: Segmentation fault at malloc.c:4232
- From: hanpingtian
- Segmentation fault at malloc.c:4232
- Prev by Date: Re: What/where is default route set?
- Previous by thread: Re: Segmentation fault at malloc.c:4232
- Next by thread: usb hub working with linux fedora
- Index(es):
Relevant Pages
|
