(gdb) thread 1
[Switching to thread 1 (Thread 19828.0x447c)]
#0 0x00622ee0 in morecore_nolock (size=1052672) at gmalloc.c:703
703 while ((__malloc_size_t) BLOCK ((char *) result + size)>
newsize);
(gdb) p /x size
$1 = 0x101000
(gdb) p /x heapsize
$2 = 0x80000
(gdb) p result
$3 = (void *) 0x807d0000
(gdb) p newsize
$4 = 0
(gdb) p _heapbase
$5 = 0x816000 "\202"
(gdb) p _heapinfo
$6 = (malloc_info *) 0x80060000
Is _heapbase the problem? This is initialized to _heapinfo at the first
call of malloc and is never changed. _heapinfo presumably points into
the static heap at that point. (_heapinfo is later changed as a result
of realloc.) This low value of _heapbase is used in the BLOCK macro.