mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-22 07:37:38 +01:00
2be1c2754a
Without these, I was getting errors from this test set claiming that wait, WIFCONTINUED, et al. were undefined on FreeBSD 11.1.
145 lines
3.3 KiB
C
145 lines
3.3 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2003-2004 Hewlett-Packard Co
|
|
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
|
|
|
This file is part of libunwind.
|
|
|
|
Copyright (c) 2003 Hewlett-Packard Co.
|
|
|
|
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. */
|
|
|
|
#include "compiler.h"
|
|
|
|
#include <libunwind.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <sys/resource.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
|
|
#define panic(args...) \
|
|
{ fprintf (stderr, args); exit (-1); }
|
|
|
|
void * stack_start;
|
|
|
|
#define PAGE_SIZE 4096
|
|
|
|
void do_backtrace (void)
|
|
{
|
|
void* buffer[1024];
|
|
int size = 1024;
|
|
mprotect((void*)((uintptr_t)stack_start & ~(PAGE_SIZE - 1)),
|
|
PAGE_SIZE, PROT_NONE);
|
|
|
|
unw_cursor_t cursor;
|
|
unw_word_t ip, sp;
|
|
unw_context_t uc;
|
|
int ret;
|
|
int steps = 0;
|
|
|
|
unw_getcontext (&uc);
|
|
if (unw_init_local (&cursor, &uc) < 0)
|
|
panic ("unw_init_local failed!\n");
|
|
|
|
do
|
|
{
|
|
unw_get_reg (&cursor, UNW_REG_IP, &ip);
|
|
unw_get_reg (&cursor, UNW_REG_SP, &sp);
|
|
|
|
ret = unw_step (&cursor);
|
|
if (ret < 0)
|
|
{
|
|
unw_get_reg (&cursor, UNW_REG_IP, &ip);
|
|
}
|
|
steps ++;
|
|
}
|
|
while (ret > 0);
|
|
|
|
if (steps < 5)
|
|
{
|
|
exit(-1);
|
|
}
|
|
|
|
mprotect((void*)((uintptr_t)stack_start & ~(PAGE_SIZE - 1)),
|
|
PAGE_SIZE, PROT_READ|PROT_WRITE);
|
|
}
|
|
|
|
void consume_and_run (int depth)
|
|
{
|
|
unw_cursor_t cursor;
|
|
unw_context_t uc;
|
|
char string[1024];
|
|
|
|
sprintf (string, "hello %p %p\n", &cursor, &uc);
|
|
if (depth == 0) {
|
|
do_backtrace();
|
|
} else {
|
|
consume_and_run(depth - 1);
|
|
}
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv UNUSED)
|
|
{
|
|
int start;
|
|
unw_context_t uc;
|
|
unw_cursor_t cursor;
|
|
|
|
stack_start = &start;
|
|
|
|
// Initialize pipe mem validate check, opens file descriptors
|
|
unw_getcontext(&uc);
|
|
if (unw_init_local (&cursor, &uc) < 0)
|
|
panic ("unw_init_local failed!\n");
|
|
|
|
int i;
|
|
for (i = 3; i < 10; i++)
|
|
{
|
|
|
|
pid_t childpid = fork();
|
|
if (!childpid)
|
|
{
|
|
/* Close fds and make sure we still work */
|
|
int ret = close(i);
|
|
}
|
|
|
|
int status;
|
|
if (childpid)
|
|
{
|
|
wait(&status);
|
|
if (WIFEXITED(status))
|
|
return WEXITSTATUS(status);
|
|
else
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
consume_and_run (10);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|