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authorSimon Marchi <simon.marchi@polymtl.ca>2021-06-11 18:29:33 -0400
committerSimon Marchi <simon.marchi@polymtl.ca>2021-07-12 20:46:53 -0400
commit922cc93d5da6a6dc422b7e7a09ee745414d67457 (patch)
tree4963b5066e4c34a8b7b2331195c977254e55973e /gdb/regcache.c
parent71a2349005e74e0d64554f5c88e3632f3ace167a (diff)
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gdb: maintain ptid -> thread map, optimize find_thread_ptid
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>
Diffstat (limited to 'gdb/regcache.c')
-rw-r--r--gdb/regcache.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/gdb/regcache.c b/gdb/regcache.c
index 21fa25d..ac44d71 100644
--- a/gdb/regcache.c
+++ b/gdb/regcache.c
@@ -2044,8 +2044,13 @@ regcache_thread_ptid_changed ()
target1.mock_inferior.pid = old_ptid.pid ();
target1.mock_thread.ptid = old_ptid;
+ target1.mock_inferior.ptid_thread_map.clear ();
+ target1.mock_inferior.ptid_thread_map[old_ptid] = &target1.mock_thread;
+
target2.mock_inferior.pid = old_ptid.pid ();
target2.mock_thread.ptid = old_ptid;
+ target2.mock_inferior.ptid_thread_map.clear ();
+ target2.mock_inferior.ptid_thread_map[old_ptid] = &target2.mock_thread;
gdb_assert (regcaches.empty ());