From: Simon Marchi <simon.marchi@efficios.com>
Date: Tue, 3 Dec 2019 20:19:35 +0000 (-0500)
Subject: Make find_thread_ptid lookup thread map instead of iterate
X-Git-Url: http://git.efficios.com/?p=deliverable%2Fbinutils-gdb.git;a=commitdiff_plain;h=4c449d978ae4916445678ca41993d280aa6854ed

Make find_thread_ptid lookup thread map instead of iterate

Now that inferior threads are stored in a map, change the
find_thread_ptid function to look up a thread using std::map::find,
instead of iterating on all of the inferior's threads.
---

diff --git a/gdb/thread.c b/gdb/thread.c
index 487626619f..a0c4a45a20 100644
--- a/gdb/thread.c
+++ b/gdb/thread.c
@@ -530,11 +530,11 @@ find_thread_ptid (ptid_t ptid)
 struct thread_info *
 find_thread_ptid (inferior *inf, ptid_t ptid)
 {
-  for (thread_info *tp : inf->threads ())
-    if (tp->ptid == ptid)
-      return tp;
-
-  return NULL;
+  auto it = inf->thread_map.find (ptid);
+  if (it != inf->thread_map.end ())
+    return it->second;
+  else
+    return nullptr;
 }
 
 /* See gdbthread.h.  */