strengthen test_alloca to check alignment

1 files changed, 9 insertions, 4 deletions

diff --git a/tests/core/test_alloca.in b/tests/core/test_alloca.in
index bfad3324..d115880f 100644
--- a/tests/core/test_alloca.in
+++ b/tests/core/test_alloca.in
@@ -1,9 +1,14 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <assert.h>
 
-int main() {
-  char *pc;
-  pc = (char *)alloca(5);
-  printf("z:%d*%d*\n", pc > 0, (int)pc);
+int main(int argc, char **argv) {
+  char *pc, *pc2;
+  assert(argc == 1);
+  pc = (char *)alloca(4+argc);
+  assert(((int)pc) % 4 == 0);
+  pc2 = (char *)alloca(4+argc);
+  assert(((int)pc2) % 4 == 0);
+  printf("z:%d*%d*%d*\n", pc > 0, (int)pc, (int)pc2);
   return 0;
 }