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# Copyright (C) 2017-2021 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
# 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 <>.
# Please email any bugs, comments, and/or additions to this file to:
# This file verifies that methods Inferior.thread_from_handle
# and InferiorThread.handle work as expected.
load_lib gdb-python.exp
if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable debug] != "" } {
return -1
clean_restart ${binfile}
# Skip all tests if Python scripting is not enabled.
if { [skip_python_tests] } { continue }
gdb_test "break after_mc_barrier" \
"Breakpoint 2 at .*: file .*${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_handle().
gdb_test "python print(gdb.selected_inferior().thread_from_handle(gdb.parse_and_eval('thrs\[0\]')).num)" \
"1" "print thread id for thrs\[0\]"
gdb_test "python print(gdb.selected_inferior().thread_from_handle(gdb.parse_and_eval('thrs\[1\]')).num)" \
"2" "print thread id for thrs\[1\]"
gdb_test "python print(gdb.selected_inferior().thread_from_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_handle(gdb.parse_and_eval('thrs\[3\]')))" \
"None" "print thread for bogus handle thrs\[3\]"
gdb_test "python print(gdb.selected_inferior().thread_from_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_handle(gdb.lookup_symbol('main')))" \
".*TypeError: Argument 'handle' must be a thread handle object.*" \
"TypeError when passing a symbol object to thread_from_handle"
# We should see an exception when passing too large of an object.
gdb_test "python print(gdb.selected_inferior().thread_from_handle(gdb.parse_and_eval('thrs')))" \
".*Thread handle size mismatch.*" \
"Pass overly large object to thread_from_handle"
# We should see an exception when passing too small of an object.
gdb_test "python print(gdb.selected_inferior().thread_from_handle(gdb.parse_and_eval('\"S\"')))" \
".*Thread handle size mismatch.*" \
"Pass too small of an object to thread_from_handle"
# Test the thread_handle method
gdb_py_test_silent_cmd "python tp=gdb.lookup_type('pthread_t')" \
"Get pthread_t type" 0
gdb_py_test_silent_cmd "python inf=gdb.selected_inferior()" "Get inferior" 0
foreach thrN {0 1 2} {
with_test_prefix "thread $thrN" {
gdb_py_test_silent_cmd \
"python hand = gdb.parse_and_eval('thrs\[$thrN\]')" \
"fetch thread handle from inferior" \
gdb_py_test_silent_cmd \
"python hand_bytes = inf.thread_from_handle(hand).handle()" \
"fetch thread handle from thread" \
# It'd be nice to be able to use this comparison expression:
# hand == hand_bytes
# But this won't work because hand is a gdb.Value and hand_bytes
# is a Python bytes object. Therefore, we convert the bytes
# object into a gdb.value by calling the two argument form of
# its constructor.
gdb_test "python print(gdb.Value(hand_bytes, tp) == hand)" \
"True" \
"verify that handles are the same"