/* Top level stuff for GDB, the GNU debugger.
- Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 1999
- Free Software Foundation, Inc.
+ Copyright 1986-2000 Free Software Foundation, Inc.
This file is part of GDB.
#include <sys/types.h>
+#include <setjmp.h>
#include "event-top.h"
#include "gdb_string.h"
#include "gdb_stat.h"
#include <ctype.h>
+#ifdef UI_OUT
+#include "ui-out.h"
+#include "cli-out.h"
+#endif
/* Prototypes for local functions */
int linesize = 100;
/* Nonzero if the current command is modified by "server ". This
- affects things like recording into the command history, comamnds
+ affects things like recording into the command history, commands
repeating on RETURN, etc. This is so a user interface (emacs, GUI,
whatever) can issue its own commands and also send along commands
from the user, and have the user not notice that the user interface
/* Timeout limit for response from target. */
-int remote_timeout = 20; /* Set default to 20 */
+/* The default value has been changed many times over the years. It
+ was originally 5 seconds. But that was thought to be a long time
+ to sit and wait, so it was changed to 2 seconds. That was thought
+ to be plenty unless the connection was going through some terminal
+ server or multiplexer or other form of hairy serial connection.
+
+ In mid-1996, remote_timeout was moved from remote.c to top.c and
+ it began being used in other remote-* targets. It appears that the
+ default was changed to 20 seconds at that time, perhaps because the
+ Hitachi E7000 ICE didn't always respond in a timely manner.
+
+ But if 5 seconds is a long time to sit and wait for retransmissions,
+ 20 seconds is far worse. This demonstrates the difficulty of using
+ a single variable for all protocol timeouts.
+
+ As remote.c is used much more than remote-e7000.c, it was changed
+ back to 2 seconds in 1999. */
+
+int remote_timeout = 2;
/* Non-zero tells remote* modules to output debugging info. */
void (*command_loop_hook) PARAMS ((void));
-/* Called instead of fputs for all output. */
-
-void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer, GDB_FILE * stream));
-
/* Called from print_frame_info to list the line we stopped in. */
void (*print_frame_info_listing_hook) PARAMS ((struct symtab * s, int line,
PARAMS ((void)) ATTR_NORETURN;
\f
+/* Generally one should use catch_errors rather than manipulating these
+ directly. The exception is main(). */
+#if defined(HAVE_SIGSETJMP)
+#define SIGJMP_BUF sigjmp_buf
+#define SIGSETJMP(buf) sigsetjmp(buf, 1)
+#define SIGLONGJMP(buf,val) siglongjmp(buf,val)
+#else
+#define SIGJMP_BUF jmp_buf
+#define SIGSETJMP(buf) setjmp(buf)
+#define SIGLONGJMP(buf,val) longjmp(buf,val)
+#endif
+
/* Where to go for return_to_top_level (RETURN_ERROR). */
- SIGJMP_BUF error_return;
+static SIGJMP_BUF error_return;
/* Where to go for return_to_top_level (RETURN_QUIT). */
- SIGJMP_BUF quit_return;
+static SIGJMP_BUF quit_return;
/* Return for reason REASON. This generally gets back to the command
loop, but can be caught via catch_errors. */
- NORETURN void
+NORETURN void
return_to_top_level (reason)
enum return_reason reason;
{
disable_current_display ();
do_cleanups (ALL_CLEANUPS);
- if (event_loop_p && target_can_async_p ())
+ if (event_loop_p && target_can_async_p () && !target_executing)
do_exec_cleanups (ALL_CLEANUPS);
if (event_loop_p && sync_execution)
do_exec_error_cleanups (ALL_CLEANUPS);
catch_errors. Note that quit should return to the command line
fairly quickly, even if some further processing is being done. */
+/* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with
+ error() et.al. could maintain a set of flags that indicate the the
+ current state of each of the longjmp buffers. This would give the
+ longjmp code the chance to detect a longjmp botch (before it gets
+ to longjmperror()). Prior to 1999-11-05 this wasn't possible as
+ code also randomly used a SET_TOP_LEVEL macro that directly
+ initialize the longjmp buffers. */
+
+/* MAYBE: cagney/1999-11-05: Since the SET_TOP_LEVEL macro has been
+ eliminated it is now possible to use the stack to directly store
+ each longjmp buffer. The global code would just need to update a
+ pointer (onto the stack - ulgh!?) indicating the current longjmp
+ buffers. It would certainly improve the performance of the longjmp
+ code since the memcpy's would be eliminated. */
+
+/* MAYBE: cagney/1999-11-05: Should the catch_erros and cleanups code
+ be consolidated into a single file instead of being distributed
+ between utils.c and top.c? */
+
int
catch_errors (func, args, errstring, mask)
catch_errors_ftype *func;
if (mask & RETURN_MASK_QUIT)
memcpy (quit_return, tmp_jmp, sizeof (SIGJMP_BUF));
val = (*func) (args);
+ /* FIXME: cagney/1999-11-05: A correct FUNC implementaton will
+ clean things up (restoring the cleanup chain) to the state
+ they were just prior to the call. Technically, this means
+ that the below restore_cleanups call is redundant.
+ Unfortunatly, many FUNC's are not that well behaved.
+ restore_cleanups should either be replaced with a do_cleanups
+ call (to cover the problem) or an assertion check to detect
+ bad FUNCs code. */
}
else
val = 0;
return val;
}
+struct captured_command_args
+ {
+ catch_command_errors_ftype *command;
+ char *arg;
+ int from_tty;
+ };
+
+static int
+do_captured_command (void *data)
+{
+ struct captured_command_args *context = data;
+ context->command (context->arg, context->from_tty);
+ /* FIXME: cagney/1999-11-07: Technically this do_cleanups() call
+ isn't needed. Instead an assertion check could be made that
+ simply confirmed that the called function correctly cleaned up
+ after its self. Unfortunatly, old code (prior to 1999-11-04) in
+ main.c was calling SET_TOP_LEVEL(), calling the command function,
+ and then *always* calling do_cleanups(). For the moment we
+ remain ``bug compatible'' with that old code.. */
+ do_cleanups (ALL_CLEANUPS);
+ return 1;
+}
+
+int
+catch_command_errors (catch_command_errors_ftype *command,
+ char *arg, int from_tty, return_mask mask)
+{
+ struct captured_command_args args;
+ args.command = command;
+ args.arg = arg;
+ args.from_tty = from_tty;
+ return catch_errors (do_captured_command, &args, "", mask);
+}
+
+
/* Handler for SIGHUP. */
#ifdef SIGHUP
initialize_targets (); /* Setup target_terminal macros for utils.c */
initialize_utils (); /* Make errors and warnings possible */
initialize_all_files ();
+ initialize_current_architecture ();
init_main (); /* But that omits this file! Do it now */
/* The signal handling mechanism is different depending whether or
set_language (language_c);
expected_language = current_language; /* don't warn about the change. */
- /* All the interpreters should have had a look at things by now.
- Initialize the selected interpreter. */
+#ifdef UI_OUT
+ /* Install the default UI */
+ uiout = cli_out_new (gdb_stdout);
+#endif
+
if (init_ui_hook)
init_ui_hook (argv0);
}
}
/* Recursively print a command (including full control structures). */
+#ifdef UI_OUT
+void
+print_command_lines (uiout, cmd, depth)
+ struct ui_out *uiout;
+ struct command_line *cmd;
+ unsigned int depth;
+{
+ struct command_line *list;
+
+ list = cmd;
+ while (list)
+ {
+
+ if (depth)
+ ui_out_spaces (uiout, 2 * depth);
+
+ /* A simple command, print it and continue. */
+ if (list->control_type == simple_control)
+ {
+ ui_out_field_string (uiout, NULL, list->line);
+ ui_out_text (uiout, "\n");
+ list = list->next;
+ continue;
+ }
+
+ /* loop_continue to jump to the start of a while loop, print it
+ and continue. */
+ if (list->control_type == continue_control)
+ {
+ ui_out_field_string (uiout, NULL, "loop_continue");
+ ui_out_text (uiout, "\n");
+ list = list->next;
+ continue;
+ }
+
+ /* loop_break to break out of a while loop, print it and continue. */
+ if (list->control_type == break_control)
+ {
+ ui_out_field_string (uiout, NULL, "loop_break");
+ ui_out_text (uiout, "\n");
+ list = list->next;
+ continue;
+ }
+
+ /* A while command. Recursively print its subcommands and continue. */
+ if (list->control_type == while_control)
+ {
+ ui_out_text (uiout, "while ");
+ ui_out_field_fmt (uiout, NULL, "while %s", list->line);
+ ui_out_text (uiout, "\n");
+ print_command_lines (uiout, *list->body_list, depth + 1);
+ ui_out_field_string (uiout, NULL, "end");
+ if (depth)
+ ui_out_spaces (uiout, 2 * depth);
+ ui_out_text (uiout, "end\n");
+ list = list->next;
+ continue;
+ }
+
+ /* An if command. Recursively print both arms before continueing. */
+ if (list->control_type == if_control)
+ {
+ ui_out_text (uiout, "if ");
+ ui_out_field_fmt (uiout, NULL, "if %s", list->line);
+ ui_out_text (uiout, "\n");
+ /* The true arm. */
+ print_command_lines (uiout, list->body_list[0], depth + 1);
+
+ /* Show the false arm if it exists. */
+ if (list->body_count == 2)
+ {
+ if (depth)
+ ui_out_spaces (uiout, 2 * depth);
+ ui_out_field_string (uiout, NULL, "else");
+ ui_out_text (uiout, "else\n");
+ print_command_lines (uiout, list->body_list[1], depth + 1);
+ }
+
+ ui_out_field_string (uiout, NULL, "end");
+ if (depth)
+ ui_out_spaces (uiout, 2 * depth);
+ ui_out_text (uiout, "end\n");
+ list = list->next;
+ continue;
+ }
+
+ /* ignore illegal command type and try next */
+ list = list->next;
+ } /* while (list) */
+}
+#else
void
print_command_line (cmd, depth, stream)
struct command_line *cmd;
unsigned int depth;
- GDB_FILE *stream;
+ struct ui_file *stream;
{
unsigned int i;
fputs_filtered ("end\n", stream);
}
}
+#endif
/* Execute the command in CMD. */
}
}
+/* Read commands from `instream' and execute them until end of file or
+ error reading instream. This command loop doesnt care about any
+ such things as displaying time and space usage. If the user asks
+ for those, they won't work. */
+void
+simplified_command_loop (read_input_func, execute_command_func)
+ char *(*read_input_func) (char *);
+ void (*execute_command_func) (char *, int);
+{
+ struct cleanup *old_chain;
+ char *command;
+ int stdin_is_tty = ISATTY (stdin);
+
+ while (instream && !feof (instream))
+ {
+ quit_flag = 0;
+ if (instream == stdin && stdin_is_tty)
+ reinitialize_more_filter ();
+ old_chain = make_cleanup ((make_cleanup_func) command_loop_marker, 0);
+
+ /* Get a command-line. */
+ command = (*read_input_func) (instream == stdin ?
+ get_prompt () : (char *) NULL);
+
+ if (command == 0)
+ return;
+
+ (*execute_command_func) (command, instream == stdin);
+
+ /* Do any commands attached to breakpoint we stopped at. */
+ bpstat_do_actions (&stop_bpstat);
+
+ do_cleanups (old_chain);
+ }
+}
\f
/* Commands call this if they do not want to be repeated by null lines. */
/* Print the GDB banner. */
void
print_gdb_version (stream)
- GDB_FILE *stream;
+ struct ui_file *stream;
{
/* From GNU coding standards, first line is meant to be easy for a
program to parse, and is just canonical program name and version
number, which starts after last space. */
+#ifdef UI_OUT
+ /* Print it console style until a format is defined */
+ fprintf_filtered (stream, "GNU gdb %s (UI_OUT)\n", version);
+#else
fprintf_filtered (stream, "GNU gdb %s\n", version);
+#endif
/* Second line is a copyright notice. */
projects / deliverable / binutils-gdb.git / blobdiff