mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-12-23 20:03:43 +01:00
74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2004 Hewlett-Packard Co
|
|
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
|
|
|
This file is part of libunwind.
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining
|
|
a copy of this software and associated documentation files (the
|
|
"Software"), to deal in the Software without restriction, including
|
|
without limitation the rights to use, copy, modify, merge, publish,
|
|
distribute, sublicense, and/or sell copies of the Software, and to
|
|
permit persons to whom the Software is furnished to do so, subject to
|
|
the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be
|
|
included in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
|
|
/* This program creates lots of mappings such that on Linux the
|
|
reading of /proc/PID/maps gets very slow. With proper caching,
|
|
test-ptrace should still run at acceptable speed once
|
|
/proc/PID/maps has been scanned. If the program dies with a
|
|
SIGALRM, it means it was running unexpectedly slow. */
|
|
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include <sys/mman.h>
|
|
|
|
#if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
|
|
# define MAP_ANONYMOUS MAP_ANON
|
|
#endif
|
|
#if !defined(MAP_NORESERVE)
|
|
# define MAP_NORESERVE 0
|
|
#endif
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
long n = 0;
|
|
|
|
signal (SIGUSR1, SIG_IGN);
|
|
signal (SIGUSR2, SIG_IGN);
|
|
|
|
printf ("Starting mmap test...\n");
|
|
for (n = 0; n < 30000; ++n)
|
|
{
|
|
if (mmap (NULL, 1, (n & 1) ? PROT_READ : PROT_WRITE,
|
|
MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE,
|
|
-1, 0) == MAP_FAILED)
|
|
{
|
|
printf ("Failed after %ld successful maps\n", n - 1);
|
|
exit (0);
|
|
}
|
|
}
|
|
|
|
alarm (80); /* die if we don't finish in 80 seconds */
|
|
|
|
printf ("Turning on single-stepping...\n");
|
|
kill (getpid (), SIGUSR1); /* tell test-ptrace to start single-stepping */
|
|
printf ("Va bene?\n");
|
|
kill (getpid (), SIGUSR2); /* tell test-ptrace to stop single-stepping */
|
|
printf ("Turned single-stepping off...\n");
|
|
return 0;
|
|
}
|