mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-06-17 07:21:44 +02:00
110 lines
2.4 KiB
C
110 lines
2.4 KiB
C
/* This test program checks whether proc_info lookup failures are
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cached. They must NOT be cached because it could otherwise turn
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temporary failures into permanent ones. Furthermore, we allow apps
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to return -UNW_ESTOPUNWIND to terminate unwinding (though this
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feature is deprecated and dynamic unwind info should be used
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instead). */
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#include <stdio.h>
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#include <string.h>
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#include <libunwind.h>
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int errors;
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#define panic(args...) \
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{ ++errors; fprintf (stderr, args); return -1; }
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static int
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find_proc_info (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pip,
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int need_unwind_info, void *arg)
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{
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return -UNW_ESTOPUNWIND;
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}
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static int
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access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
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int write, void *arg)
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{
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if (!write)
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*valp = 0;
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return 0;
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}
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static int
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access_reg (unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
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int write, void *arg)
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{
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if (!write)
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*valp = 32;
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return 0;
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}
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static int
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access_fpreg (unw_addr_space_t as, unw_regnum_t regnum, unw_fpreg_t *valp,
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int write, void *arg)
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{
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if (!write)
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memset (valp, 0, sizeof (valp));
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return 0;
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}
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static int
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get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dilap, void *arg)
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{
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return -UNW_ENOINFO;
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}
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static int
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nop (void)
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{
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panic ("nop() got called!\n");
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return -1;
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}
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int
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main (int argc, char **argv)
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{
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unw_accessors_t acc;
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unw_addr_space_t as;
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int ret, verbose = 0;
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unw_cursor_t c;
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if (argc > 1 && strcmp (argv[0], "-v") == 0)
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verbose = 1;
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memset (&acc, 0, sizeof (acc));
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acc.find_proc_info = find_proc_info;
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acc.put_unwind_info = (void *) nop;
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acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
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acc.access_mem = access_mem;
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acc.access_reg = access_reg;
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acc.access_fpreg = access_fpreg;
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acc.resume = (void *) nop;
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acc.get_proc_name = (void *) nop;
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as = unw_create_addr_space (&acc, 0);
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if (!as)
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panic ("unw_create_addr_space() failed\n");
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unw_set_caching_policy (as, UNW_CACHE_GLOBAL);
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ret = unw_init_remote (&c, as, NULL);
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if (ret < 0)
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panic ("unw_init_remote() returned %d instead of 0\n", ret);
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ret = unw_step (&c);
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if (ret != -UNW_ESTOPUNWIND)
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panic ("First call to unw_step() returned %d instead of %d\n",
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ret, -UNW_ESTOPUNWIND);
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ret = unw_step (&c);
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if (ret != -UNW_ESTOPUNWIND)
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panic ("Second call to unw_step() returned %d instead of %d\n",
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ret, -UNW_ESTOPUNWIND);
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if (verbose)
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printf ("SUCCESS\n");
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return 0;
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}
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