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922cc93d5d
When debugging a large number of threads (thousands), looking up a thread by ptid_t using the inferior::thread_list linked list can add up. Add inferior::thread_map, an std::unordered_map indexed by ptid_t, and change the find_thread_ptid function to look up a thread using std::unordered_map::find, instead of iterating on all of the inferior's threads. This should make it faster to look up a thread from its ptid. Change-Id: I3a8da0a839e18dee5bb98b8b7dbeb7f3dfa8ae1c Co-Authored-By: Pedro Alves <pedro@palves.net>
82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
/* RAII type to create a temporary mock context.
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Copyright (C) 2020-2021 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef SCOPED_MOCK_CONTEXT_H
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#define SCOPED_MOCK_CONTEXT_H
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#include "inferior.h"
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#include "gdbthread.h"
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#include "progspace.h"
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#include "progspace-and-thread.h"
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#if GDB_SELF_TEST
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namespace selftests {
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/* RAII type to create (and switch to) a temporary mock context. An
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inferior with a thread, with a process_stratum target pushed. */
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template<typename Target>
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struct scoped_mock_context
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{
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/* Order here is important. */
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Target mock_target;
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ptid_t mock_ptid {1, 1};
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program_space mock_pspace {new_address_space ()};
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inferior mock_inferior {mock_ptid.pid ()};
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thread_info mock_thread {&mock_inferior, mock_ptid};
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scoped_restore_current_pspace_and_thread restore_pspace_thread;
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explicit scoped_mock_context (gdbarch *gdbarch)
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{
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/* Add the mock inferior to the inferior list so that look ups by
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target+ptid can find it. */
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inferior_list.push_back (mock_inferior);
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mock_inferior.thread_list.push_back (mock_thread);
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mock_inferior.ptid_thread_map[mock_ptid] = &mock_thread;
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mock_inferior.gdbarch = gdbarch;
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mock_inferior.aspace = mock_pspace.aspace;
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mock_inferior.pspace = &mock_pspace;
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/* Switch to the mock inferior. */
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switch_to_inferior_no_thread (&mock_inferior);
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/* Push the process_stratum target so we can mock accessing
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registers. */
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gdb_assert (mock_target.stratum () == process_stratum);
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mock_inferior.push_target (&mock_target);
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/* Switch to the mock thread. */
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switch_to_thread (&mock_thread);
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}
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~scoped_mock_context ()
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{
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inferior_list.erase (inferior_list.iterator_to (mock_inferior));
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pop_all_targets_at_and_above (process_stratum);
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}
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};
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} // namespace selftests
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#endif /* GDB_SELF_TEST */
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#endif /* !defined (SCOPED_MOCK_CONTEXT_H) */
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