(Logical change 1.95)

tests/test-proc-info.c

@@ -0,0 +1,109 @@
+/* This test program checks whether proc_info lookup failures are
+   cached.  They must NOT be cached because it could otherwise turn
+   temporary failures into permanent ones.  Furthermore, we allow apps
+   to return -UNW_ESTOPUNWIND to terminate unwinding (though this
+   feature is deprecated and dynamic unwind info should be used
+   instead).  */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <libunwind.h>
+
+int errors;
+
+#define panic(args...)					\
+	{ ++errors; fprintf (stderr, args); return -1; }
+
+static int
+find_proc_info (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pip,
+		int need_unwind_info, void *arg)
+{
+  return -UNW_ESTOPUNWIND;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
+	    int write, void *arg)
+{
+  if (!write)
+    *valp = 0;
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
+	    int write, void *arg)
+{
+  if (!write)
+    *valp = 32;
+  return 0;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t regnum, unw_fpreg_t *valp,
+	      int write, void *arg)
+{
+  if (!write)
+    memset (valp, 0, sizeof (valp));
+  return 0;
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dilap, void *arg)
+{
+  return -UNW_ENOINFO;
+}
+
+static int
+nop (void)
+{
+  panic ("nop() got called!\n");
+  return -1;
+}
+
+int
+main (int argc, char **argv)
+{
+  unw_accessors_t acc;
+  unw_addr_space_t as;
+  int ret, verbose = 0;
+  unw_cursor_t c;
+
+  if (argc > 1 && strcmp (argv[0], "-v") == 0)
+    verbose = 1;
+
+  memset (&acc, 0, sizeof (acc));
+  acc.find_proc_info = find_proc_info;
+  acc.put_unwind_info = (void *) nop;
+  acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  acc.access_mem = access_mem;
+  acc.access_reg = access_reg;
+  acc.access_fpreg = access_fpreg;
+  acc.resume = (void *) nop;
+  acc.get_proc_name = (void *) nop;
+
+  as = unw_create_addr_space (&acc, 0);
+  if (!as)
+    panic ("unw_create_addr_space() failed\n");
+
+  unw_set_caching_policy (as, UNW_CACHE_GLOBAL);
+
+  ret = unw_init_remote (&c, as, NULL);
+  if (ret < 0)
+    panic ("unw_init_remote() returned %d instead of 0\n", ret);
+
+  ret = unw_step (&c);
+  if (ret != -UNW_ESTOPUNWIND)
+    panic ("First call to unw_step() returned %d instead of %d\n",
+	   ret, -UNW_ESTOPUNWIND);
+
+  ret = unw_step (&c);
+  if (ret != -UNW_ESTOPUNWIND)
+    panic ("Second call to unw_step() returned %d instead of %d\n",
+	   ret, -UNW_ESTOPUNWIND);
+
+  if (verbose)
+    printf ("SUCCESS\n");
+  return 0;
+}