When I try to load a font in Xlib via XLoadQueryFont with the following font name "fixed", the program does not leak, and everything is freed in the end.
When I try to load another font, the programs still works fine, however valgrind points a memory leak.
What could cause this problem? Notice that the program works fine with both fonts, and it loads them correctly. I have the font installed. It also leaks with these:
"-adobe-*-*-*-*-*-14-*-*-*-*-*-*-*"
"-*-*-*-*-*-*-14-*-*-*-*-*-*-*"
"-misc-*-*-*-*-*-*-*-*-*-*-*-*-*"
and many varitions. They load, but leaks memory.
This is a minimal example
#include <X11/Xlib.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
void
main()
{
Display* display;
XFontStruct* font_info; /* Font structure, used for drawing text. */
char* font_name = "*-helvetica-*-12-*"; /* font to use for drawing text. */
// char *font_name = "fixed";
/* open connection with the X server. */
display = XOpenDisplay(getenv("DISPLAY"));
if (display == NULL) {
fprintf(stderr, "cannot connect to X server\n");
exit(1);
}
/* try to load the given font. */
font_info = XLoadQueryFont(display, font_name);
if (!font_info) {
fprintf(stderr, "XLoadQueryFont: failed loading font '%s'\n", font_name);
exit(-1);
}
/* close the connection to the X server. */
XFreeFont(display, font_info);
XCloseDisplay(display);
}
This is the valgrind log for when the leak happens: https://pastebin.com/gg3AhZeh
Using pastebin since it exceeded the limit.
I expect the program to end correctly freeing all bytes previousy allocated.
