From d64ff72c3605be453f4c889e5324eeb0f734ec3b Mon Sep 17 00:00:00 2001
From: Mathieu Othacehe <mathieu.othacehe@landisgyr.com>
Date: Sun, 23 Feb 2025 19:49:38 +0100
Subject: [PATCH] tests: Improve the backtrace test

Make sure that the backtrace contains at least 3 frames.
---
 tests/Gtest-bt.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/Gtest-bt.c b/tests/Gtest-bt.c
index d1ac6f3d..8790ac84 100644
--- a/tests/Gtest-bt.c
+++ b/tests/Gtest-bt.c
@@ -48,6 +48,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 #define panic(...)				\
 	{ fprintf (stderr, __VA_ARGS__); exit (-1); }
 
+#define MIN_FRAMES 3
 #define SIG_STACK_SIZE 0x100000
 
 int verbose;
@@ -65,6 +66,7 @@ do_backtrace (void)
 {
   unw_word_t ip, sp, off;
   unw_proc_info_t pi;
+  unsigned int num_frames = 0;
   int ret;
 
   if (verbose)
@@ -120,9 +122,17 @@ do_backtrace (void)
 		  ret, (long) ip);
 	  ++num_errors;
 	}
+
+      ++num_frames;
     }
   while (ret > 0);
 
+  if (num_frames < MIN_FRAMES) {
+         printf ("FAILURE: only found %u frames in the backtrace\n",
+                 num_frames);
+         ++num_errors;
+  }
+
   {
     void *buffer[20];
     int i, n;