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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465/* * Copyright © 2018 Alexey Dobriyan <adobriyan@gmail.com> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */// Test that /proc/thread-self gives correct TGID/PID.#undef NDEBUG#include <assert.h>#include <sched.h>#include <stdio.h>#include <unistd.h>#include <sys/mman.h>#include <sys/wait.h>
#include "proc.h"
int f(void *arg){ char buf1[64], buf2[64]; pid_t pid, tid; ssize_t rv;
pid = sys_getpid(); tid = sys_gettid(); snprintf(buf1, sizeof(buf1), "%u/task/%u", pid, tid);
rv = readlink("/proc/thread-self", buf2, sizeof(buf2)); assert(rv == strlen(buf1)); buf2[rv] = '\0'; assert(streq(buf1, buf2));
if (arg) exit(0); return 0;}
int main(void){ const int PAGE_SIZE = sysconf(_SC_PAGESIZE); pid_t pid; void *stack;
/* main thread */ f((void *)0);
stack = mmap(NULL, 2 * PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); assert(stack != MAP_FAILED); /* side thread */ pid = clone(f, stack + PAGE_SIZE, CLONE_THREAD|CLONE_SIGHAND|CLONE_VM, (void *)1); assert(pid > 0); pause();
return 0;}