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manual: Fix backtraces code example [BZ #10441]

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Validation for pointer returned by backtrace_symbols () added.
Type of variables size and i is changed from size_t to int.

Variable size is used to collect the result from backtrace ()
that is an int. i is the loop counter variable so it can be an int.

Since, size_t size is changed to int size, in printf %zd is changed to %d.

Reviewed-by: DJ Delorie <dj@redhat.com>
This commit is contained in:
Girish Joshi 2020-05-29 10:06:53 -03:00 committed by Adhemerval Zanella
parent 6544999083
commit 5d5b3bd94c
1 changed files with 7 additions and 6 deletions
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9
manual/examples/execinfo.c
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@ -24,17 +24,18 @@ void
print_trace (void) print_trace (void)
{ {
void *array[10]; void *array[10];
size_t size;
char **strings; char **strings;
size_t i; int size, i;
size = backtrace (array, 10); size = backtrace (array, 10);
strings = backtrace_symbols (array, size); strings = backtrace_symbols (array, size);
if (strings != NULL)
{
printf ("Obtained %zd stack frames.\n", size); printf ("Obtained %d stack frames.\n", size);
for (i = 0; i < size; i++) for (i = 0; i < size; i++)
printf ("%s\n", strings[i]); printf ("%s\n", strings[i]);
}
free (strings); free (strings);
} }