Attachment 1197942 Details for Bug 1373197 – dyninst-reattach-loop.cpp

dyninst-reattach-loop.cpp

dyninst-reattach-loop.cpp (text/plain), 1.45 KB, created by Florian Weimer on 2016-09-05 13:12:38 UTC

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Creator: Florian Weimer

Created: 2016-09-05 13:12:38 UTC

Size: 1.45 KB

patch

obsolete

>#include <dyninst/PCProcess.h>
>#include <dyninst/Symtab.h>
>#include <dyninst/Variable.h>
>
>#include <err.h>
>#include <gnu/lib-names.h>
>#include <pthread.h>
>#include <signal.h>
>#include <stdio.h>
>#include <stdlib.h>
>
>#include <atomic>
>#include <thread>
>
>int
>main(int argc, char **argv)
>{
>  if (argc != 2) {
>    fprintf(stderr, "usage: %s PID\n", argv[0]);
>    return 1;
>  }
>
>  int pid = atoi(argv[1]);
>  if (pid <= 0) {
>    fprintf(stderr, "error: invalid PID: %s\n", argv[1]);
>    return 2;
>  }
>
>  Dyninst::ProcControlAPI::Process::ptr proc
>    {Dyninst::ProcControlAPI::Process::attachProcess(pid)};
>
>  std::atomic<size_t> loops{};
>  std::atomic<bool> running{true};
>  std::thread watchdog([&loops, &running]() {
>      sigset_t blocked;
>      sigfillset(&blocked);
>      pthread_sigmask(SIG_BLOCK, &blocked, nullptr);
>      while (true) {
>        if (!running) {
>          fprintf(stderr,
>                  "error: process appears to be stuck (%zu iterations)\n",
>                  loops.load());
>          pause();
>        }
>        usleep (1000 * 1000);
>        running = false;
>      }
>    });
>
>  while (true) {
>    running = true;
>    if (!proc->temporaryDetach()) {
>      fprintf (stderr, "error: temporaryDetach failed (%zu iteratiosn)\n",
>               loops.load());
>      _exit(2);
>    }
>    sched_yield();
>    if (!proc->reAttach()) {
>      fprintf (stderr, "error: reAttach failed (%zu iterations)\n",
>               loops.load());
>      _exit(2);
>    }
>    ++loops;
>  }
>}
>

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Attachments on bug 1373197: 1197942