OpenBSD nasu.my.domain 6.2 GENERIC.MP#238 amd64.
The following trivial program:
#include <stdio.h>
int
main(int argc, char *argv[])
{
printf("Hello, world!\n");
return 0;
}
Gives the following malloc.out output when run with MALLOC_OPTIONS=D:
******** Start dump testes *******
MT=0 I=1 F=0 U=0 J=1 R=0 X=0 C=0 cache=64 G=0
Malloc dir of testes pool 0 at 0x7b935db0050
Region slots free 511/512
Finds 0/0
Inserts 1/0
Deletes 0/0
Cheap reallocs 0/0
In use 77824
Guarded 0
Free chunk structs:
Free pages cached: 0
slot) hash d type page f size [free/n]
8e) # 8e 0 pages 0x7b9f1391000 0x7b70b611bd7 65536
Leak report
f sum # avg
0x7b70b611bd7 65536 1 65536
******** End dump testes *******
When fclose(stdout) is added before the return, the leak disappears, so
I guess libc either doesn't free its own (lazily allocated?) FILE*s, or
MALLOC_OPTIONS=D dumps its stats before it is done. Closing
stdin/stdout/stderr probably shouldn't be required of a program to be
leak-free?
