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-rw-r--r--debug/backtrace-tst.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/debug/backtrace-tst.c b/debug/backtrace-tst.c
new file mode 100644
index 0000000..d899fb0
--- /dev/null
+++ b/debug/backtrace-tst.c
@@ -0,0 +1,44 @@
+#include <execinfo.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+static int
+compare (const void *p1, const void *p2)
+{
+ void *ba[20];
+ int n = backtrace (ba, sizeof (ba) / sizeof (ba[0]));
+ if (n != 0)
+ {
+ char **names = backtrace_symbols (ba, n);
+ if (names != NULL)
+ {
+ int i;
+ printf ("called from %s\n", names[0]);
+ for (i = 1; i < n; ++i)
+ printf (" %s\n", names[i]);
+ free (names);
+ }
+ }
+
+ return *(uint32_t *) p1 - *(uint32_t *) p2;
+}
+
+
+int
+main (int argc, char *argv[])
+{
+ uint32_t arr[20];
+ size_t cnt;
+
+ for (cnt = 0; cnt < sizeof (arr) / sizeof (arr[0]); ++cnt)
+ arr[cnt] = random ();
+
+ qsort (arr, sizeof (arr) / sizeof (arr[0]), sizeof (arr[0]), compare);
+
+ for (cnt = 0; cnt < sizeof (arr) / sizeof (arr[0]); ++cnt)
+ printf ("%" PRIx32 "\n", arr[cnt]);
+
+ return 0;
+}