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2003/02/21 18:59:31-08:00 hp.com!davidm Rename: tests/test-resume-sig.c -> tests/Gtest-resume-sig.c (Logical change 1.53)
2024-12-12 17:06:00 +00:00 · 2003-02-22 03:08:22 +00:00 · 2003-02-22 03:08:22 +00:00 · 899ce01967
commit 899ce01967
parent a0f3b067b8
1 changed files with 115 additions and 0 deletions
--- a/tests/Gtest-resume-sig.c
+++ b/tests/Gtest-resume-sig.c
@ -0,0 +1,115 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 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.  */
+
+/*  Verify that unw_resume() restores the signal mask at proper time.  */
+
+#include <libunwind.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define panic(args...)						\
+	do { fprintf (stderr, args); ++nerrors; } while (0)
+
+int verbose;
+int nerrors;
+int got_usr1, got_usr2;
+char *sigusr1_sp;
+
+void
+handler (int sig)
+{
+  unw_word_t ip;
+  sigset_t mask;
+  unw_context_t uc;
+  unw_cursor_t c;
+  char foo;
+
+#if UNW_TARGET_IA64
+  void *bsp = __builtin_ia64_bsp ();
+  if (verbose)
+    printf ("bsp = %p\n", bsp);
+#endif
+
+  if (verbose)
+    printf ("got signal %d\n", sig);
+
+  if (sig == SIGUSR1)
+    {
+      ++got_usr1;
+      sigusr1_sp = &foo;
+
+      sigemptyset (&mask);
+      sigaddset (&mask, SIGUSR2);
+      sigprocmask (SIG_BLOCK, &mask, NULL);
+      kill (getpid (), SIGUSR2);	/* pend SIGUSR2 */
+
+      signal (SIGUSR1, SIG_IGN);
+      signal (SIGUSR2, handler);
+
+      unw_getcontext(&uc);
+      unw_init_local(&c, &uc);
+      unw_step(&c);		/* step to signal trampoline */
+      unw_step(&c);		/* step to signaller frame (main ()) */
+      unw_get_reg(&c, UNW_REG_IP, &ip);
+      if (verbose)
+	printf ("resuming at 0x%lx, with SIGUSR2 pending\n", ip);
+      unw_resume(&c);
+    }
+  else if (sig == SIGUSR2)
+    {
+      ++got_usr2;
+      if (got_usr1)
+	{
+	  if (sigusr1_sp != &foo)
+	    panic ("Stack pointer changed from %p to %p between signals\n",
+		   sigusr1_sp, &foo);
+	  else if (verbose)
+	    printf ("OK: stack still at %p\n", &foo);
+	}
+      signal (SIGUSR2, SIG_IGN);
+    }
+  else
+    panic ("Got unexpected signal %d\n", sig);
+}
+
+int
+main (int argc, char **argv)
+{
+  if (argc > 1)
+    verbose = 1;
+
+  signal (SIGUSR1, handler);
+
+  if (verbose)
+    printf ("sending SIGUSR1\n");
+  kill (getpid (), SIGUSR1);
+
+  if (nerrors)
+    fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
+
+  if (verbose)
+    printf ("SUCCESS\n");
+  return 0;
+}