Using R7.5 with xserver v1.7.1 and vesa driver 2.3.0, it appears a
small leak occurs on each XOpenDisplay/XCloseDisplay call pair. This
was encountered during some unrelated testing, and eventually
distilled down to those 2 calls.
Previously on 6.9.0 this leak did not occur. Our application makes
multiple connections over time to the X server, I fear I'm simply
doing something wrong or abusive here, is this a known issue?
With the attached trivial test snippet (just XOpenDisplay followed by
XCloseDisplay), running it continually increases the memory owned by
the X process until it is eventually oom-killed some hours later. I'm
working to remedy the limited debugging utilities available on the
target machine to get more details.
Bug 25029 [1] seemed close, but feels unrelated due to those functions
being called on initialization, not per-connection (unless that's not
the case of course).
[1] https://bugs.freedesktop.org/show_bug.cgi?id=25029
#include <X11/Xlib.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
int main()
{
unsigned long int cnt = 0l;
while (1)
{
Display* display = XOpenDisplay(NULL);
assert(display);
XCloseDisplay(display);
if (!(++cnt % 1000))
{
printf("%8ld iterations complete...\n", cnt);
}
}
return 0;
}
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