Make it an automatic test.

2003/02/07 10:36:32-08:00 mostang.com!davidm Rename: tests/exc.c -> tests/test-exc.c (Logical change 1.45)
2024-11-22 15:47:37 +01:00 · 2003-02-08 10:10:59 +00:00 · 2003-02-08 10:10:59 +00:00 · 0098b771ce
commit 0098b771ce
parent 824d6619b5
1 changed files with 143 additions and 0 deletions
--- a/tests/test-exc.c
+++ b/tests/test-exc.c
@ -0,0 +1,143 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2001-2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/* This illustrates the basics of using the unwind interface for
+   exception handling.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+
+#define panic(args...)				\
+	{ ++nerrors; fprintf (stderr, args); }
+
+int nerrors = 0;
+int verbose = 0;
+
+static void b (void *);
+
+static void
+raise_exception (void *addr)
+{
+  unw_cursor_t cursor;
+  unw_word_t ip;
+  unw_context_t uc;
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    {
+      panic ("unw_init_local() failed!\n");
+      return;
+    }
+
+  /* unwind to frame b(): */
+  if (unw_step (&cursor) < 0)
+    {
+      panic ("unw_step() failed!\n");
+      return;
+    }
+
+  /* unwind to frame a(): */
+  if (unw_step (&cursor) < 0)
+    {
+      panic ("unw_step() failed!\n");
+      return;
+    }
+
+  unw_get_reg (&cursor, UNW_REG_IP, &ip);
+  if (verbose)
+    printf ("old ip = %lx, new ip = %p\n", (long) ip, addr);
+
+  if (unw_set_reg (&cursor, UNW_REG_IP, (unw_word_t) addr) < 0)
+    {
+      panic ("unw_set_reg() failed!\n");
+      return;
+    }
+
+  unw_resume (&cursor);	/* transfer control to exception handler */
+}
+
+#if !UNW_TARGET_IA64
+
+void *
+__builtin_ia64_bsp (void)
+{
+  return NULL;
+}
+
+#endif
+
+static int
+a (void)
+{
+  long stack;
+
+  if (verbose)
+    printf ("a: sp=%p bsp=%p\n", &stack, __builtin_ia64_bsp ());
+  b (&&handler);
+  panic ("FAILURE: unexpected return from func()!\n");
+
+#if UNW_TARGET_IA64
+  asm volatile ("1:");	/* force a new bundle */
+#endif
+ handler:
+  if (verbose)
+    {
+      printf ("exception handler: here we go (sp=%p, bsp=%p)...\n",
+	      &stack, __builtin_ia64_bsp ());
+      /* This call works around a bug in gcc (up-to pre3.4) which
+	 causes invalid assembly code to be generated when
+	 __builtin_ia64_bsp() gets predicated.  */
+      getpid ();
+    }
+  return 0;
+}
+
+static void
+b (void *addr)
+{
+  if (verbose)
+    printf ("b() calling raise_exception()\n");
+  raise_exception (addr);
+  panic ("FAILURE: b() returned from raise_exception()!!\n");
+}
+
+int
+main (int argc, char **argv)
+{
+  if (argc > 1)
+    ++verbose;
+
+  if (a () != 0 || nerrors > 0)
+    {
+      fprintf (stderr, "FAILURE: test failed; try again?\n");
+      exit (-1);
+    }
+
+  if (verbose)
+    printf ("SUCCESS!\n");
+  return 0;
+}