1 files changed, 78 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/tst-sigcontext-get_pc.c b/sysdeps/unix/sysv/linux/tst-sigcontext-get_pc.c
new file mode 100644
index 0000000000..dbe3fbd782
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tst-sigcontext-get_pc.c
@@ -0,0 +1,78 @@
+/* Test that the GET_PC macro is consistent with the unwinder.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+/* This test searches for the value of the GET_PC macro in the
+   addresses obtained from the backtrace function.  */
+
+#include <array_length.h>
+#include <execinfo.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <support/check.h>
+#include <support/xsignal.h>
+#include <sigcontextinfo.h>
+
+static bool handler_called;
+
+static void
+handler (int signal, siginfo_t *info, void *ctx)
+{
+  TEST_COMPARE (signal, SIGUSR1);
+
+  uintptr_t pc = sigcontext_get_pc (ctx);
+  printf ("info: address in signal handler: 0x%" PRIxPTR "\n", pc);
+
+  void *callstack[10];
+  int callstack_count = backtrace (callstack, array_length (callstack));
+  TEST_VERIFY_EXIT (callstack_count > 0);
+  TEST_VERIFY_EXIT (callstack_count <= array_length (callstack));
+  bool found = false;
+  for (int i = 0; i < callstack_count; ++i)
+    {
+      const char *marker;
+      if ((uintptr_t) callstack[i] == pc)
+        {
+          found = true;
+          marker = " *";
+        }
+      else
+        marker = "";
+      printf ("info: call stack entry %d: 0x%" PRIxPTR "%s\n",
+              i, (uintptr_t) callstack[i], marker);
+    }
+  TEST_VERIFY (found);
+  handler_called = true;
+}
+
+static int
+do_test (void)
+{
+  struct sigaction sa =
+    {
+     .sa_sigaction = &handler,
+     .sa_flags = SA_SIGINFO
+    };
+  xsigaction (SIGUSR1, &sa, NULL);
+  raise (SIGUSR1);
+  TEST_VERIFY (handler_called);
+  return 0;
+}
+
+#include <support/test-driver.c>