4d8335ad75
This is a pretty big commit, so let's run through it in parts: - All of the userspace changes are to switch away from syscall_wait Mostly, this is to waitpid; some things were tweaked to do things "properly" instead of waiting for particular processes. Init has been fixed to do a proper spin wait. - syscall_wait is gone - as are its uses. newlib bindings have been using just waitpid for a while now. - waitpid now performs like a Unix waitpid - process reaping is no longer a "do this on next change thing": it happens when a process is waited on, like it should (That means we can have real zombies: terminated processes that have not yet been waited on) - Reparenting of children to init has been implemented, so you can fork-daemonize! Overall, this is pretty big... So I hope it doesn't break everything.
37 lines
670 B
C
37 lines
670 B
C
/*
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* thrash-process
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* Creates a lot of processes.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <syscall.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/wait.h>
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int main(int argc, char ** argv) {
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int quiet = 0;
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if (argc > 1) {
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if (!strcmp(argv[1],"-q")) {
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printf("I'll be quiet...\n");
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quiet = 1;
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}
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}
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for (int j = 0; j < 1024; ++j) {
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volatile int k = fork();
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if (!quiet)
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printf("I am %d, I got %d\n", getpid(), k);
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if (k == 0) {
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if (!quiet || !(j % 10))
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printf("I am %d\n", getpid());
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return 0;
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} else {
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if (!quiet)
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printf("Waiting on %d\n", k);
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waitpid(k, NULL, 0);
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}
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}
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return 0;
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}
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