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glibc  2.9
Defines | Functions | Variables
tst-align2.c File Reference
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <tst-stack-align.h>
#include <unistd.h>
#include "../test-skeleton.c"

Go to the source code of this file.

Defines

#define TEST_FUNCTION   do_test ()

Functions

void in_dso (int *, bool *, int *)
static void __attribute__ ((constructor))
static void __attribute__ ((destructor))
static int do_test (void)

Variables

static int res
static int fds [2]
static int result
static bool test_destructors

Define Documentation

#define TEST_FUNCTION   do_test ()

Definition at line 156 of file tst-align2.c.


Function Documentation

static void __attribute__ ( (constructor)  ) [static]

Definition at line 33 of file tst-align2.c.

{
  res = TEST_STACK_ALIGN () ? -1 : 1;
}
static void __attribute__ ( (destructor)  ) [static]

Definition at line 38 of file tst-align2.c.

{
  if (!test_destructors)
    return;

  char c = TEST_STACK_ALIGN () ? 'B' : 'A';
  write (fds[1], &c, 1);
}

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static int do_test ( void  ) [static]

Definition at line 48 of file tst-align2.c.

{
  if (!res)
    {
      puts ("binary's constructor has not been run");
      result = 1;
    }
  else if (res != 1)
    {
      puts ("binary's constructor has been run without sufficient alignment");
      result = 1;
    }

  if (TEST_STACK_ALIGN ())
    {
      puts ("insufficient stack alignment in do_test");
      result = 1;
    }

  in_dso (&result, &test_destructors, &fds[1]);

  if (pipe (fds) < 0)
    {
      printf ("couldn't create pipe: %m\n");
      return 1;
    }

  pid_t pid = fork ();
  if (pid < 0)
    {
      printf ("fork failed: %m\n");
      return 1;
    }

  if (!pid)
    {
      close (fds[0]);
      test_destructors = true;
      exit (0);
    }

  close (fds[1]);

  unsigned char c;
  ssize_t len;
  int des_seen = 0, dso_des_seen = 0;
  while ((len = TEMP_FAILURE_RETRY (read (fds[0], &c, 1))) > 0)
    {
      switch (c)
        {
        case 'B':
          puts ("insufficient alignment in binary's destructor");
          result = 1;
          /* FALLTHROUGH */
        case 'A':
          des_seen++;
          break;
        case 'D':
          puts ("insufficient alignment in DSO destructor");
          result = 1;
          /* FALLTHROUGH */
        case 'C':
          dso_des_seen++;
          break;
        default:
          printf ("unexpected character %x read from pipe", c);
          result = 1;
          break;
        }
    }

  close (fds[0]);

  if (des_seen != 1)
    {
      printf ("binary destructor run %d times instead of once\n", des_seen);
      result = 1;
    }

  if (dso_des_seen != 1)
    {
      printf ("DSO destructor run %d times instead of once\n", dso_des_seen);
      result = 1;
    }

  int status;
  pid_t termpid;
  termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
  if (termpid == -1)
    {
      printf ("waitpid failed: %m\n");
      result = 1;
    }
  else if (termpid != pid)
    {
      printf ("waitpid returned %ld != %ld\n",
             (long int) termpid, (long int) pid);
      result = 1;
    }
  else if (!WIFEXITED (status) || WEXITSTATUS (status))
    {
      puts ("child hasn't exited with exit status 0");
      result = 1;
    }

  return result;
}

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void in_dso ( int ,
bool *  ,
int  
)

Definition at line 35 of file tst-alignmod2.c.

{
  if (!res)
    {
      puts ("constructor has not been run");
      *result = 1;
    }
  else if (res != 1)
    {
      puts ("constructor has been run without sufficient alignment");
      *result = 1;
    }

  test_destructorsp = test_destructors;
  fdp = fd;
}

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Variable Documentation

int fds[2] [static]

Definition at line 28 of file tst-align2.c.

int res [static]

Definition at line 28 of file tst-align2.c.

int result [static]

Definition at line 28 of file tst-align2.c.

bool test_destructors [static]

Definition at line 29 of file tst-align2.c.