[PATCH 2/5] [func_call] New tests for a btrace crash.

[Ari Hannula <ari.hannula@intel.com>]

From: "ravitheja.addepally" <ravitheja.addepally@intel.com>

During remote debugging when stoppin in the start-routine of a pthread,
GDB crashes when attempting to display function-call-history.

gdb/testsuite/ChangeLog:
2015-04-27  ravitheja.addepally  <ravitheja.addepally@intel.com>

	* gdb.btrace/server-multithreaded-function-call-history.c: New file.
	* gdb.btrace/server-multithreaded-function-call-history.exp: New file.

Signed-off-by: ravitheja.addepally <ravitheja.addepally@intel.com>
Signed-off-by: Ari Hannula <ari.hannula@intel.com>
---
 ...rver-multithreaded-function-call-history.c | 70 +++++++++++++++++++
 ...er-multithreaded-function-call-history.exp | 61 ++++++++++++++++
 2 files changed, 131 insertions(+)
 create mode 100644 gdb/testsuite/gdb.btrace/server-multithreaded-function-call-history.c
 create mode 100644 gdb/testsuite/gdb.btrace/server-multithreaded-function-call-history.exp

diff --git a/gdb/testsuite/gdb.btrace/server-multithreaded-function-call-history.c b/gdb/testsuite/gdb.btrace/server-multithreaded-function-call-history.c
new file mode 100644
index 0000000000..4dbe4c1fe8
--- /dev/null
+++ b/gdb/testsuite/gdb.btrace/server-multithreaded-function-call-history.c
@@ -0,0 +1,70 @@
+/* Manythreads test program.
+   Copyright 2004-2022 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   Copied from gdb.threads/manythreads.c  */
+
+#include <pthread.h>
+#ifdef DEBUG
+#include <stdio.h>
+#endif
+#include <limits.h>
+
+void *
+thread_function (void *arg)
+{
+  int x = * (int *) arg;
+
+#ifdef DEBUG
+  printf ("Thread <%d> executing\n", x);
+#endif /* DEBUG */
+
+  return NULL;
+}
+
+int 
+main (int argc, char **argv)
+{
+  pthread_attr_t attr;
+  pthread_t threads[256];
+  int args[256];
+  int i, j;
+
+  pthread_attr_init (&attr);
+
+#ifdef PTHREAD_STACK_MIN
+  pthread_attr_setstacksize (&attr, 2*PTHREAD_STACK_MIN);
+#endif
+
+  /* Create a ton of quick-executing threads, then wait for them to
+     complete.  */
+  for (i = 0; i < 1000; ++i) 
+    {
+      for (j = 0; j < 256; ++j)
+	{
+	  args[j] = i * 1000 + j;
+	  pthread_create (&threads[j], &attr, thread_function, &args[j]);
+	}
+
+      for (j = 0; j < 256; ++j)
+	  pthread_join (threads[j], NULL);
+    }
+
+  pthread_attr_destroy (&attr);
+
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.btrace/server-multithreaded-function-call-history.exp b/gdb/testsuite/gdb.btrace/server-multithreaded-function-call-history.exp
new file mode 100644
index 0000000000..3af51c4228
--- /dev/null
+++ b/gdb/testsuite/gdb.btrace/server-multithreaded-function-call-history.exp
@@ -0,0 +1,61 @@
+# This testcase is part of GDB, the GNU debugger.
+
+# Copyright 2005-2022 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+load_lib gdbserver-support.exp
+
+standard_testfile
+
+if { [skip_gdbserver_tests] } {
+    return 0
+}
+
+if { [skip_btrace_tests] } {
+    return -1
+}
+
+set opts { debug }
+if [info exists DEBUG] {
+    lappend opts "additional_flags=-DDEBUG"
+}
+
+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable $opts] != "" } {
+    return -1
+}
+
+gdb_exit
+gdb_start
+gdb_load $binfile
+
+# Make sure we're disconnected, in case we're testing with an
+# extended-remote board, therefore already connected.
+gdb_test "disconnect" ".*"
+
+gdbserver_run ""
+gdb_reinitialize_dir $srcdir/$subdir
+
+gdb_breakpoint main
+gdb_test "continue" "Breakpoint.* main .*" "continue to main"
+
+gdb_test_no_output "record btrace"
+
+gdb_breakpoint thread_function
+gdb_test "continue" "Breakpoint.* thread_function .*" "continue to thread_function one"
+
+# test passes if this does not crash
+gdb_test "record function-call-history" ".*"
+
+gdb_test "continue" "Breakpoint.* thread_function .*" "continue to thread_function two"
-- 
2.25.1

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