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

   1 /* Restartable Sequences single-threaded tests.
   2    Copyright (C) 2021-2024 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 <sys/auxv.h>
  33 # include <thread_pointer.h>
  34 # include <tls.h>
  35 # include "tst-rseq.h"
  36
  37 static void
  38 do_rseq_main_test (void)
  39 {
  40   struct pthread *pd = THREAD_SELF;
  41
  42   TEST_VERIFY_EXIT (rseq_thread_registered ());
  43   TEST_COMPARE (__rseq_flags, 0);
  44   TEST_VERIFY ((char *) __thread_pointer () + __rseq_offset
  45                == (char *) &pd->rseq_area);
  46   /* The current implementation only supports the initial size.  */
  47   TEST_COMPARE (__rseq_size, 20);
  48 }
  49
  50 static void
  51 do_rseq_test (void)
  52 {
  53   if (!rseq_available ())
  54     {
  55       FAIL_UNSUPPORTED ("kernel does not support rseq, skipping test");
  56     }
  57   printf ("info: __rseq_size: %u\n", __rseq_size);
  58   printf ("info: __rseq_offset: %td\n", __rseq_offset);
  59   printf ("info: __rseq_flags: %u\n", __rseq_flags);
  60   printf ("info: getauxval (AT_RSEQ_FEATURE_SIZE): %ld\n",
  61           getauxval (AT_RSEQ_FEATURE_SIZE));
  62   printf ("info: getauxval (AT_RSEQ_ALIGN): %ld\n", getauxval (AT_RSEQ_ALIGN));
  63   do_rseq_main_test ();
  64 }
  65 #else /* RSEQ_SIG */
  66 static void
  67 do_rseq_test (void)
  68 {
  69   FAIL_UNSUPPORTED ("glibc does not define RSEQ_SIG, skipping test");
  70 }
  71 #endif /* RSEQ_SIG */
  72
  73 static int
  74 do_test (void)
  75 {
  76   do_rseq_test ();
  77   return 0;
  78 }
  79
  80 #include <support/test-driver.c>