Home | History | Annotate | Download | only in tests 
      1 #define UNW_LOCAL_ONLY
      2 #include <libunwind.h>
      3 #include "compiler.h"
      4 
      5 #include <stdarg.h>
      6 #include <stdio.h>
      7 #include <stdlib.h>
      8 #include <unistd.h>
      9 
     10 int ok;
     11 int verbose;
     12 
     13 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 3)
     14 void a (int, ...) __attribute__((optimize(0)));
     15 void b (void) __attribute__((optimize(0)));
     16 void c (void) __attribute__((optimize(0)));
     17 #endif
     18 
     19 void NOINLINE
     20 b (void)
     21 {
     22   void *v[20];
     23   int i, n;
     24 
     25   n = unw_backtrace(v, 20);
     26 
     27   /* Check that the number of addresses given by unw_backtrace() looks
     28    * reasonable. If the compiler inlined everything, then this check will also
     29    * break. */
     30   if (n >= 7)
     31     ok = 1;
     32 
     33   if (verbose)
     34     for (i = 0; i < n; ++i)
     35       printf ("[%d] %p\n", i, v[i]);
     36 }
     37 
     38 void NOINLINE
     39 c (void)
     40 {
     41     b ();
     42 }
     43 
     44 void NOINLINE
     45 a (int d, ...)
     46 {
     47   switch (d)
     48     {
     49     case 5:
     50       a (4, 2,4);
     51       break;
     52     case 4:
     53       a (3, 1,3,5);
     54       break;
     55     case 3:
     56       a (2, 11, 13, 17, 23);
     57       break;
     58     case 2:
     59       a (1);
     60       break;
     61     case 1:
     62       c ();
     63     }
     64 }
     65 
     66 int
     67 main (int argc, char **argv UNUSED)
     68 {
     69   if (argc > 1)
     70     verbose = 1;
     71 
     72   a (5, 3, 4, 5, 6);
     73 
     74   if (!ok)
     75     {
     76       fprintf (stderr, "FAILURE: expected deeper backtrace.\n");
     77       return 1;
     78     }
     79 
     80   if (verbose)
     81     printf ("SUCCESS.\n");
     82 
     83   return 0;
     84 }
     85