Work around GCC 6.3.1 bug

[deliverable/binutils-gdb.git] / gdb / linux-thread-db.c

diff --git a/gdb/linux-thread-db.c b/gdb/linux-thread-db.c
index 6d981357cf804f7c366326cc0f130cbfe0fa7d58..453505b3d72f4d96909551872cc345c7a15d71ce 100644 (file)
--- a/gdb/linux-thread-db.c
+++ b/gdb/linux-thread-db.c
@@ -1410,6 +1410,37 @@ thread_db_extra_thread_info (struct target_ops *self,
   return NULL;
 }
 
+/* Return pointer to the thread_info struct which corresponds to
+   THREAD_HANDLE (having length HANDLE_LEN).  */
+
+static struct thread_info *
+thread_db_thread_handle_to_thread_info (struct target_ops *ops,
+                                       const gdb_byte *thread_handle,
+                                       int handle_len,
+                                       struct inferior *inf)
+{
+  struct thread_info *tp;
+  thread_t handle_tid;
+
+  /* Thread handle sizes must match in order to proceed.  We don't use an
+     assert here because the resulting internal error will cause GDB to
+     exit.  This isn't necessarily an internal error due to the possibility
+     of garbage being passed as the thread handle via the python interface.  */
+  if (handle_len != sizeof (handle_tid))
+    error (_("Thread handle size mismatch: %d vs %zu (from libthread_db)"),
+          handle_len, sizeof (handle_tid));
+
+  handle_tid = * (const thread_t *) thread_handle;
+
+  ALL_NON_EXITED_THREADS (tp)
+    {
+      if (tp->inf == inf && tp->priv != NULL && handle_tid == tp->priv->tid)
+        return tp;
+    }
+
+  return NULL;
+}
+
 /* Get the address of the thread local variable in load module LM which
    is stored at OFFSET within the thread local storage for thread PTID.  */
 
@@ -1560,7 +1591,7 @@ info_auto_load_libthread_db (char *args, int from_tty)
   char *pids;
   int i;
 
-  cs = skip_spaces_const (cs);
+  cs = skip_spaces (cs);
   if (*cs)
     error (_("'info auto-load libthread-db' does not accept any parameters"));
 
@@ -1691,14 +1722,12 @@ init_thread_db_ops (void)
     = thread_db_get_thread_local_address;
   thread_db_ops.to_extra_thread_info = thread_db_extra_thread_info;
   thread_db_ops.to_get_ada_task_ptid = thread_db_get_ada_task_ptid;
+  thread_db_ops.to_thread_handle_to_thread_info = thread_db_thread_handle_to_thread_info;
   thread_db_ops.to_magic = OPS_MAGIC;
 
   complete_target_initialization (&thread_db_ops);
 }
 
-/* Provide a prototype to silence -Wmissing-prototypes.  */
-extern initialize_file_ftype _initialize_thread_db;
-
 void
 _initialize_thread_db (void)
 {