--- /dev/null
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2017 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/>. */
+
+#include <pthread.h>
+#include <unistd.h>
+#include <memory.h>
+
+#define NTHR 3
+#define NBOGUSTHR 2
+
+int thr_data[NTHR];
+
+/* Thread handles for each thread plus some "bogus" threads. */
+pthread_t thrs[NTHR + NBOGUSTHR];
+
+/* The thread children will meet at this barrier. */
+pthread_barrier_t c_barrier;
+
+/* The main thread and child thread will meet at this barrier. */
+pthread_barrier_t mc_barrier;
+
+void
+do_something (int n)
+{
+}
+
+void *
+do_work (void *data)
+{
+ int num = * (int *) data;
+
+ /* As the child threads are created, they'll meet the main thread
+ at this barrier. We do this to ensure that threads end up in
+ GDB's thread list in the order in which they were created. Having
+ this ordering makes it easier to write the test. */
+ pthread_barrier_wait (&mc_barrier);
+
+ /* All of the child threads will meet at this barrier before proceeding.
+ This ensures that all threads will be active (not exited) and in
+ roughly the same state when the first one hits the breakpoint in
+ do_something(). */
+ pthread_barrier_wait (&c_barrier);
+
+ do_something (num);
+
+ pthread_exit (NULL);
+}
+
+void
+after_mc_barrier (void)
+{
+}
+
+int
+main (int argc, char **argv)
+{
+ int i;
+
+ pthread_barrier_init (&c_barrier, NULL, NTHR - 1);
+ pthread_barrier_init (&mc_barrier, NULL, 2);
+
+ thrs[0] = pthread_self ();
+ thr_data[0] = 1;
+
+ /* Create two bogus thread handles. */
+ memset (&thrs[NTHR], 0, sizeof (pthread_t));
+ memset (&thrs[NTHR + 1], 0xaa, sizeof (pthread_t));
+
+ for (i = 1; i < NTHR; i++)
+ {
+ thr_data[i] = i + 1;
+
+ pthread_create (&thrs[i], NULL, do_work, &thr_data[i]);
+ pthread_barrier_wait (&mc_barrier);
+ after_mc_barrier ();
+ }
+
+ for (i = 1; i < NTHR; i++)
+ pthread_join (thrs[i], NULL);
+}
--- /dev/null
+# Copyright (C) 2017 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/>.
+
+# Please email any bugs, comments, and/or additions to this file to:
+# bug-gdb@gnu.org
+
+# This file verifies that gdb.Inferior.thread_from_thread_handle works
+# as expected.
+
+standard_testfile
+
+
+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable debug] != "" } {
+ return -1
+}
+
+clean_restart ${binfile}
+runto_main
+
+gdb_test "break after_mc_barrier" \
+ "Breakpoint 2 at .*: file .*${srcfile}, line .*" \
+ "breakpoint on after_mc_barrier"
+
+gdb_test "break do_something" \
+ "Breakpoint 3 at .*: file .*${srcfile}, line .*" \
+ "breakpoint on do_something"
+
+gdb_test "continue" \
+ "Breakpoint 2, after_mc_barrier .*" \
+ "run to after_mc_barrier"
+
+gdb_test_no_output "del 2" "delete after_mc_barrier breakpoint"
+
+gdb_test "continue" \
+ "Breakpoint 3, do_something .*" \
+ "run to do_something"
+
+# The test case has been constructed so that the current thread,
+# indicated by '*' in the "info threads" output, should be stopped in
+# do_something() with a value of n which is the same as the number
+# reported in the "Id" column. If it's not, then something went wrong
+# with the start up sequence which should cause the main thread to be
+# thread 1, the first child thread to be thread 2, and the second
+# child thread to be thread 3.
+#
+# Note that \1 in the RE below is a backreference to the thread id
+# reported in the "Id" column.
+
+gdb_test "info threads" \
+ {.*[\r\n]+\* +([0-9]+) +Thread[^\r\n]* do_something \(n=\1\) at.*}
+
+# Check for expected results when passing a valid thread handle to
+# thread_from_thread_handle().
+
+gdb_test "python print(gdb.selected_inferior().thread_from_thread_handle(gdb.parse_and_eval('thrs\[0\]')).num)" \
+ "1" "print thread id for thrs\[0\]"
+
+gdb_test "python print(gdb.selected_inferior().thread_from_thread_handle(gdb.parse_and_eval('thrs\[1\]')).num)" \
+ "2" "print thread id for thrs\[1\]"
+
+gdb_test "python print(gdb.selected_inferior().thread_from_thread_handle(gdb.parse_and_eval('thrs\[2\]')).num)" \
+ "3" "print thread id for thrs\[2\]"
+
+# Objects which are of the correct size, but which are bogus thread
+# handles should return None. For the first test (using thrs[3]), we
+# use 0. For the second (thrs[4]), we use an unlikely bit pattern.
+
+gdb_test "python print(gdb.selected_inferior().thread_from_thread_handle(gdb.parse_and_eval('thrs\[3\]')))" \
+ "None" "print thread for bogus handle thrs\[3\]"
+
+gdb_test "python print(gdb.selected_inferior().thread_from_thread_handle(gdb.parse_and_eval('thrs\[4\]')))" \
+ "None" "print thread for bogus handle thrs\[4\]"
+
+# We should see an exception when passing an object of the wrong type.
+
+gdb_test "python print(gdb.selected_inferior().thread_from_thread_handle(gdb.lookup_symbol('main')))" \
+ ".*TypeError: Argument 'handle_obj' must be a thread handle object.*" \
+ "TypeError when passing a symbol object to thread_from_thread_handle"
+
+# We should see an exception when passing too large of an object.
+
+gdb_test "python print(gdb.selected_inferior().thread_from_thread_handle(gdb.parse_and_eval('thrs')))" \
+ ".*Thread handle size mismatch.*" \
+ "Pass overly large object to thread_from_thread_handle"
+
+# We should see an exception when passing too small of an object.
+
+gdb_test "python print(gdb.selected_inferior().thread_from_thread_handle(gdb.parse_and_eval('\"S\"')))" \
+ ".*Thread handle size mismatch.*" \
+ "Pass too small of an object to thread_from_thread_handle"
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