binutils-gdb/gdb/testsuite/gdb.hp/attach.c

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/* This program is intended to be started outside of gdb, and then
attached to by gdb. Thus, it simply spins in a loop. The loop
is exited when & if the variable 'should_exit' is non-zero. (It
is initialized to zero in this program, so the loop will never
exit unless/until gdb sets the variable to non-zero.)
*/
#include <stdio.h>
int should_exit = 0;
main ()
{
int local_i = 0;
while (! should_exit)
{
local_i++;
}
}