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106 lines
2.7 KiB
C++
106 lines
2.7 KiB
C++
/* libunwind - a platform-independent unwind library
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Copyright (C) 2002-2003 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/* This file tests unwinding from a constructor from within an
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atexit() handler. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <libunwind.h>
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int verbose, errors;
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#define panic(args...) \
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{ ++errors; fprintf (stderr, args); return; }
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class Test_Class {
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public:
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Test_Class (void);
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};
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static Test_Class t;
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static void
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do_backtrace (void)
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{
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char name[128], off[32];
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unw_word_t ip, offset;
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unw_cursor_t cursor;
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unw_context_t uc;
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int ret, count = 0;
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unw_getcontext (&uc);
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unw_init_local (&cursor, &uc);
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do
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{
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unw_get_reg (&cursor, UNW_REG_IP, &ip);
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name[0] = '\0';
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off[0] = '\0';
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if (unw_get_proc_name (&cursor, name, sizeof (name), &offset) == 0
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&& offset > 0)
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snprintf (off, sizeof (off), "+0x%lx", (long) offset);
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if (verbose)
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printf (" [%lx] <%s%s>\n", (long) ip, name, off);
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if (++count > 32)
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panic ("FAILURE: didn't reach beginning of unwind-chain\n");
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}
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while ((ret = unw_step (&cursor)) > 0);
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if (ret < 0)
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panic ("FAILURE: unw_step() returned %d\n", ret);
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}
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static void
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b (void)
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{
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do_backtrace();
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}
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static void
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a (void)
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{
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if (verbose)
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printf ("do_backtrace() from atexit()-handler:\n");
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b();
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if (errors)
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abort (); /* cannot portably call exit() from an atexit() handler */
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}
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Test_Class::Test_Class (void)
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{
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if (verbose)
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printf ("do_backtrace() from constructor:\n");
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b();
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}
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int
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main (int argc, char **argv __attribute__((unused)))
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{
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verbose = argc > 1;
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return atexit (a);
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}
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