Hi John,
bfd has several memory leaks. I'm fixing the ones in dwarf2.c, but a simple grep for 'bfd_realloc' shows several obvious leaks on failure:
./bfd/bfdio.c: bim->buffer = bfd_realloc (bim->buffer, newsize);
[etc]
The least intrusive way to resolve most of these would be to provide a new function called, say, bfd_realloc_or_free() which could used to replace most of the calls to bfd_realloc. It could be implemented like this:
Index: bfd/libbfd.c =================================================================== RCS file: /cvs/src/src/bfd/libbfd.c,v retrieving revision 1.38 diff -c -3 -p -r1.38 libbfd.c *** bfd/libbfd.c 4 May 2005 15:53:33 -0000 1.38 --- bfd/libbfd.c 5 May 2005 14:32:21 -0000 *************** bfd_realloc (void *ptr, bfd_size_type si *** 180,185 **** --- 180,214 ---- return ret; }
+
+ /* Reallocate memory using realloc.
+ If this fails the pointer is freed before returning. */
+
+ void *
+ bfd_realloc_or_free (void *ptr, bfd_size_type size)
+ {
+ size_t amount = (size_t) size;
+ void *ret;
+
+ if (size != amount)
+ ret = NULL;
+ else if (ptr == NULL)
+ ret = malloc (amount);
+ else
+ ret = realloc (ptr, amount);
+
+ if (ret == NULL)
+ {
+ if (amount > 0)
+ bfd_set_error (bfd_error_no_memory);
+
+ if (ptr != NULL)
+ free (ptr);
+ }
+
+ return ret;
+ }
+
/* Allocate memory using malloc and clear it. */void *
What do you think ?
Cheers Nick
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