* doc/observer.texi (executable_changed): New observer.

        * symtab.c: Include "observer.h".
        (find_main_name): New function.
        (main_name): If name_of_main is unset, then compute it
        using find_main_name.
        (symtab_observer_executable_changed): New function.
        (_initialize_symtab): Attach executable_changed observer.
        * exec.c: Include "observer.h".
        (exec_file_attach): Emit executable_changed notification.
        * symfile.c: Include "observer.h".
        (reread_symbols): Send an executable_changed if appropriate.
        * Makefile.in (exec.o): Add dependency on observer.h.
        (symfile.o): Likewise.
        (symtab.o): Likewise.

1 files changed, 7 insertions, 0 deletions

diff --git a/gdb/doc/observer.texi b/gdb/doc/observer.texi
index 8cba160..2d1c9f4 100644
--- a/gdb/doc/observer.texi
+++ b/gdb/doc/observer.texi
@@ -83,6 +83,13 @@ The inferior has stopped for real.
 The target's register contents have changed.
 @end deftypefun
 
+@deftypefun void executable_changed (void *@var{unused_args})
+The executable being debugged by GDB has changed: The user decided
+to debug a different program, or the program he was debugging has
+been modified since being loaded by the debugger (by being recompiled,
+for instance).
+@end deftypefun
+
 @deftypefun void inferior_created (struct target_ops *@var{objfile}, int @var{from_tty})
 @value{GDBN} has just connected to an inferior.  For @samp{run},
 @value{GDBN} calls this observer while the inferior is still stopped