gdbserver: Rename some functions, thread -> inferior

[deliverable/binutils-gdb.git] / gdb / gdbserver / inferiors.c

diff --git a/gdb/gdbserver/inferiors.c b/gdb/gdbserver/inferiors.c
index 21f45fadf319e81c626636c5eacea2f204635743..3c171a179ec66a1eb0003aafefc8a3e454410a66 100644 (file)
--- a/gdb/gdbserver/inferiors.c
+++ b/gdb/gdbserver/inferiors.c
@@ -1,5 +1,5 @@
 /* Inferior process information for the remote server for GDB.
-   Copyright (C) 2002-2015 Free Software Foundation, Inc.
+   Copyright (C) 2002-2017 Free Software Foundation, Inc.
 
    Contributed by MontaVista Software.
 
@@ -141,6 +141,50 @@ find_thread_ptid (ptid_t ptid)
   return (struct thread_info *) find_inferior_id (&all_threads, ptid);
 }
 
+/* Predicate function for matching thread entry's pid to the given
+   pid value passed by address in ARGS.  */
+
+static int
+thread_pid_matches_callback (struct inferior_list_entry *entry, void *args)
+{
+  return (ptid_get_pid (entry->id) == *(pid_t *)args);
+}
+
+/* Find a thread associated with the given PROCESS, or NULL if no
+   such thread exists.  */
+
+static struct thread_info *
+find_thread_process (const struct process_info *const process)
+{
+  pid_t pid = ptid_get_pid (ptid_of (process));
+
+  return (struct thread_info *)
+    find_inferior (&all_threads, thread_pid_matches_callback, &pid);
+}
+
+/* Helper for find_any_thread_of_pid.  Returns true if a thread
+   matches a PID.  */
+
+static int
+thread_of_pid (struct inferior_list_entry *entry, void *pid_p)
+{
+  int pid = *(int *) pid_p;
+
+  return (ptid_get_pid (entry->id) == pid);
+}
+
+/* See gdbthread.h.  */
+
+struct thread_info *
+find_any_thread_of_pid (int pid)
+{
+  struct inferior_list_entry *entry;
+
+  entry = find_inferior (&all_threads, thread_of_pid, &pid);
+
+  return (struct thread_info *) entry;
+}
+
 ptid_t
 gdb_id_to_thread_id (ptid_t gdb_id)
 {
@@ -153,7 +197,7 @@ static void
 free_one_thread (struct inferior_list_entry *inf)
 {
   struct thread_info *thread = get_thread (inf);
-  free_register_cache (inferior_regcache_data (thread));
+  free_register_cache (thread_regcache_data (thread));
   free (thread);
 }
 
@@ -166,6 +210,8 @@ remove_thread (struct thread_info *thread)
   discard_queued_stop_replies (ptid_of (thread));
   remove_inferior (&all_threads, (struct inferior_list_entry *) thread);
   free_one_thread (&thread->entry);
+  if (current_thread == thread)
+    current_thread = NULL;
 }
 
 /* Return a pointer to the first inferior in LIST, or NULL if there isn't one.
@@ -202,6 +248,51 @@ find_inferior (struct inferior_list *list,
   return NULL;
 }
 
+/* Find the random inferior_list_entry E in LIST for which FUNC (E, ARG)
+   returns non-zero.  If no entry is found then return NULL.  */
+
+struct inferior_list_entry *
+find_inferior_in_random (struct inferior_list *list,
+                        int (*func) (struct inferior_list_entry *, void *),
+                        void *arg)
+{
+  struct inferior_list_entry *inf = list->head;
+  int count = 0;
+  int random_selector;
+
+  /* First count how many interesting entries we have.  */
+  while (inf != NULL)
+    {
+      struct inferior_list_entry *next;
+
+      next = inf->next;
+      if ((*func) (inf, arg))
+       count++;
+      inf = next;
+    }
+
+  if (count == 0)
+    return NULL;
+
+  /* Now randomly pick an entry out of those.  */
+  random_selector = (int)
+    ((count * (double) rand ()) / (RAND_MAX + 1.0));
+
+  inf = list->head;
+  while (inf != NULL)
+    {
+      struct inferior_list_entry *next;
+
+      next = inf->next;
+      if ((*func) (inf, arg) && (random_selector-- == 0))
+       return inf;
+      inf = next;
+    }
+
+  gdb_assert_not_reached ("failed to find an inferior in random.");
+  return NULL;
+}
+
 struct inferior_list_entry *
 find_inferior_id (struct inferior_list *list, ptid_t id)
 {
@@ -218,27 +309,21 @@ find_inferior_id (struct inferior_list *list, ptid_t id)
 }
 
 void *
-inferior_target_data (struct thread_info *inferior)
-{
-  return inferior->target_data;
-}
-
-void
-set_inferior_target_data (struct thread_info *inferior, void *data)
+thread_target_data (struct thread_info *thread)
 {
-  inferior->target_data = data;
+  return thread->target_data;
 }
 
 struct regcache *
-inferior_regcache_data (struct thread_info *inferior)
+thread_regcache_data (struct thread_info *thread)
 {
-  return inferior->regcache_data;
+  return thread->regcache_data;
 }
 
 void
-set_inferior_regcache_data (struct thread_info *inferior, struct regcache *data)
+set_thread_regcache_data (struct thread_info *thread, struct regcache *data)
 {
-  inferior->regcache_data = data;
+  thread->regcache_data = data;
 }
 
 /* Return true if LIST has exactly one entry.  */
@@ -291,7 +376,9 @@ remove_process (struct process_info *process)
 {
   clear_symbol_cache (&process->symbol_cache);
   free_all_breakpoints (process);
+  gdb_assert (find_thread_process (process) == NULL);
   remove_inferior (&all_processes, &process->entry);
+  VEC_free (int, process->syscalls_to_catch);
   free (process);
 }
 
@@ -351,7 +438,7 @@ have_attached_inferiors_p (void)
 }
 
 struct process_info *
-get_thread_process (struct thread_info *thread)
+get_thread_process (const struct thread_info *thread)
 {
   int pid = ptid_get_pid (thread->entry.id);
   return find_process_pid (pid);
@@ -363,3 +450,24 @@ current_process (void)
   gdb_assert (current_thread != NULL);
   return get_thread_process (current_thread);
 }
+
+static void
+do_restore_current_thread_cleanup (void *arg)
+{
+  current_thread = (struct thread_info *) arg;
+}
+
+struct cleanup *
+make_cleanup_restore_current_thread (void)
+{
+  return make_cleanup (do_restore_current_thread_cleanup, current_thread);
+}
+
+/* See common/common-gdbthread.h.  */
+
+void
+switch_to_thread (ptid_t ptid)
+{
+  if (!ptid_equal (ptid, minus_one_ptid))
+    current_thread = find_thread_ptid (ptid);
+}