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