mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-12-29 14:23:42 +01:00
106 lines
2.6 KiB
C++
106 lines
2.6 KiB
C++
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2002-2003 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 file tests unwinding from a constructor from within an
|
|
atexit() handler. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include <libunwind.h>
|
|
|
|
int verbose, errors;
|
|
|
|
#define panic(args...) \
|
|
{ ++errors; fprintf (stderr, args); return; }
|
|
|
|
class Test_Class {
|
|
public:
|
|
Test_Class (void);
|
|
};
|
|
|
|
static Test_Class t;
|
|
|
|
static void
|
|
backtrace (void)
|
|
{
|
|
char name[128], off[32];
|
|
unw_word_t ip, offset;
|
|
unw_cursor_t cursor;
|
|
unw_context_t uc;
|
|
int ret, count = 0;
|
|
|
|
unw_getcontext (&uc);
|
|
unw_init_local (&cursor, &uc);
|
|
|
|
do
|
|
{
|
|
unw_get_reg (&cursor, UNW_REG_IP, &ip);
|
|
name[0] = '\0';
|
|
off[0] = '\0';
|
|
if (unw_get_proc_name (&cursor, name, sizeof (name), &offset) == 0
|
|
&& off > 0)
|
|
snprintf (off, sizeof (off), "+0x%lx", (long) offset);
|
|
if (verbose)
|
|
printf (" [%lx] <%s%s>\n", (long) ip, name, off);
|
|
if (++count > 32)
|
|
panic ("FAILURE: didn't reach beginning of unwind-chain\n");
|
|
}
|
|
while ((ret = unw_step (&cursor)) > 0);
|
|
|
|
if (ret < 0)
|
|
panic ("FAILURE: unw_step() returned %d\n", ret);
|
|
}
|
|
|
|
static void
|
|
b (void)
|
|
{
|
|
backtrace();
|
|
}
|
|
|
|
static void
|
|
a (void)
|
|
{
|
|
if (verbose)
|
|
printf ("backtrace() from atexit()-handler:\n");
|
|
b();
|
|
if (errors)
|
|
abort (); /* cannot portably call exit() from an atexit() handler */
|
|
}
|
|
|
|
Test_Class::Test_Class (void)
|
|
{
|
|
if (verbose)
|
|
printf ("backtrace() from constructor:\n");
|
|
b();
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
verbose = argc > 1;
|
|
return atexit (a);
|
|
}
|