gdbserver: use gdb::unordered_map

Replace the few uses of `std::unordered_map` with `gdb::unordered_map`.

The only one of these that is likely to ever see a lot of elements is
probably `process_info::m_ptid_thread_map`.  It was added precisely to
improve performance when there are a lot of threads.  So using
`gdb::unordered_map` here won't hurt.

Change-Id: Ibc4ede5245551fdd7717cb349a012d05726f4363

gdbserver/inferiors.h

@@ -19,13 +19,11 @@
 #ifndef GDBSERVER_INFERIORS_H
 #define GDBSERVER_INFERIORS_H
 
-#include "gdbsupport/gdb_vecs.h"
 #include "gdbsupport/owning_intrusive_list.h"
+#include "gdbsupport/unordered_map.h"
 
 #include "dll.h"
 
-#include <unordered_map>
-
 struct thread_info;
 struct regcache;
 struct target_desc;
@@ -94,7 +92,7 @@ struct process_info : public intrusive_list_node<process_info>
   { return m_thread_list; }
 
   /* Return a reference to the private thread map.  */
-  std::unordered_map<ptid_t, thread_info *> &thread_map ()
+  gdb::unordered_map<ptid_t, thread_info *> &thread_map ()
   { return m_ptid_thread_map; }
 
   /* Find the first thread for which FUNC returns true.  Return nullptr if no
@@ -118,7 +116,7 @@ private:
 
   /* A map of ptid_t to thread_info*, for average O(1) ptid_t lookup.
      Exited threads do not appear in the map.  */
-  std::unordered_map<ptid_t, thread_info *> m_ptid_thread_map;
+  gdb::unordered_map<ptid_t, thread_info *> m_ptid_thread_map;
 };
 
 /* Return a pointer to the current process.  Note that the current

gdbserver/linux-aarch64-tdesc.cc

@@ -24,7 +24,7 @@
 #include "arch/aarch64.h"
 #include "linux-aarch32-low.h"
 #include <inttypes.h>
-#include <unordered_map>
+#include "gdbsupport/unordered_map.h"
 
 /* Create the aarch64 target description.  */
 
@@ -35,7 +35,7 @@ aarch64_linux_read_description (const aarch64_features &features)
      this function as the in-process-agent calls this function from a
      constructor function, when globals might not yet have been
      initialised.  */
-  static std::unordered_map<aarch64_features, target_desc *> tdesc_aarch64_map;
+  static gdb::unordered_map<aarch64_features, target_desc *> tdesc_aarch64_map;
 
   if (features.vq > AARCH64_MAX_SVE_VQ)
     error (_("VQ is %" PRIu64 ", maximum supported value is %d"), features.vq,

gdbserver/server.cc

@@ -35,7 +35,7 @@
 #include "dll.h"
 #include "hostio.h"
 #include <vector>
-#include <unordered_map>
+#include "gdbsupport/unordered_map.h"
 #include "gdbsupport/common-inferior.h"
 #include "gdbsupport/job-control.h"
 #include "gdbsupport/environ.h"
@@ -947,7 +947,7 @@ handle_general_set (char *own_buf)
 	 It's nicer if we only print the final options for each TID,
 	 and if we only print about it if the options changed compared
 	 to the options that were previously set on the thread.  */
-      std::unordered_map<thread_info *, gdb_thread_options> set_options;
+      gdb::unordered_map<thread_info *, gdb_thread_options> set_options;
 
       while (*p != '\0')
 	{