sysdeps/unix/sysv/linux/tst-rseq.c

   1 /* Restartable Sequences single-threaded tests.
   2    Copyright (C) 2021-2023 Free Software Foundation, Inc.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 /* These tests validate that rseq is registered from main in an executable
  19    not linked against libpthread.  */
  20
  21 #include <support/check.h>
  22 #include <stdio.h>
  23 #include <sys/rseq.h>
  24 #include <unistd.h>
  25
  26 #ifdef RSEQ_SIG
  27 # include <errno.h>
  28 # include <error.h>
  29 # include <stdlib.h>
  30 # include <string.h>
  31 # include <syscall.h>
  32 # include <thread_pointer.h>
  33 # include <tls.h>
  34 # include "tst-rseq.h"
  35
  36 static void
  37 do_rseq_main_test (void)
  38 {
  39   struct pthread *pd = THREAD_SELF;
  40
  41   TEST_VERIFY_EXIT (rseq_thread_registered ());
  42   TEST_COMPARE (__rseq_flags, 0);
  43   TEST_VERIFY ((char *) __thread_pointer () + __rseq_offset
  44                == (char *) &pd->rseq_area);
  45   TEST_COMPARE (__rseq_size, sizeof (pd->rseq_area));
  46 }
  47
  48 static void
  49 do_rseq_test (void)
  50 {
  51   if (!rseq_available ())
  52     {
  53       FAIL_UNSUPPORTED ("kernel does not support rseq, skipping test");
  54     }
  55   do_rseq_main_test ();
  56 }
  57 #else /* RSEQ_SIG */
  58 static void
  59 do_rseq_test (void)
  60 {
  61   FAIL_UNSUPPORTED ("glibc does not define RSEQ_SIG, skipping test");
  62 }
  63 #endif /* RSEQ_SIG */
  64
  65 static int
  66 do_test (void)
  67 {
  68   do_rseq_test ();
  69   return 0;
  70 }
  71
  72 #include <support/test-driver.c>