Introduce exec_file_locate_attach

This commit adds a new function, exec_file_locate_attach, which works
like exec_file_attach except that, instead of a filename argument, it
takes an integer process ID and attempts to determine the executable
filename from that.

gdb/ChangeLog:

	* gdbcore.h (exec_file_locate_attach): New declaration.
	* exec.c (exec_file_locate_attach): New function, factored
	out from...
	* infcmd.c (attach_command_post_wait): ...here.

1 files changed, 7 insertions, 0 deletions

diff --git a/gdb/gdbcore.h b/gdb/gdbcore.h
index 63a75f0a85..a437c8af7b 100644
--- a/gdb/gdbcore.h
+++ b/gdb/gdbcore.h
@@ -150,6 +150,13 @@ extern void core_file_command (char *filename, int from_tty);
 
 extern void exec_file_attach (const char *filename, int from_tty);
 
+/* If the filename of the main executable is unknown, attempt to
+   determine it.  If a filename is determined, proceed as though
+   it was just specified with the "file" command.  Do nothing if
+   the filename of the main executable is already known.  */
+
+extern void exec_file_locate_attach (int pid, int from_tty);
+
 extern void exec_file_clear (int from_tty);
 
 extern void validate_files (void);