Fix PR threads/19422 - show which thread caused stop

[deliverable/binutils-gdb.git] / gdb / findvar.c

diff --git a/gdb/findvar.c b/gdb/findvar.c
index 11325cfed14445e29024114aaf2d74f77e6c5c70..a39d89788e8c16dd128887913c3ac8d8d998cb95 100644 (file)
--- a/gdb/findvar.c
+++ b/gdb/findvar.c
@@ -1,6 +1,6 @@
 /* Find a variable's value in memory, for GDB, the GNU debugger.
 
-   Copyright (C) 1986-2015 Free Software Foundation, Inc.
+   Copyright (C) 1986-2016 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -927,6 +927,12 @@ address_from_register (int regnum, struct frame_info *frame)
   struct type *type = builtin_type (gdbarch)->builtin_data_ptr;
   struct value *value;
   CORE_ADDR result;
+  int regnum_max_excl = (gdbarch_num_regs (gdbarch)
+                        + gdbarch_num_pseudo_regs (gdbarch));
+
+  if (regnum < 0 || regnum >= regnum_max_excl)
+    error (_("Invalid register #%d, expecting 0 <= # < %d"), regnum,
+          regnum_max_excl);
 
   /* This routine may be called during early unwinding, at a time
      where the ID of FRAME is not yet known.  Calling value_from_register
@@ -939,7 +945,7 @@ address_from_register (int regnum, struct frame_info *frame)
      pointer types.  Avoid constructing a value object in those cases.  */
   if (gdbarch_convert_register_p (gdbarch, regnum, type))
     {
-      gdb_byte *buf = alloca (TYPE_LENGTH (type));
+      gdb_byte *buf = (gdb_byte *) alloca (TYPE_LENGTH (type));
       int optim, unavail, ok;
 
       ok = gdbarch_register_to_value (gdbarch, frame, regnum, type,