1 /* Exception (throw catch) mechanism, for GDB, the GNU debugger.
3 Copyright (C) 1986-2019 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "exceptions.h"
22 #include "breakpoint.h"
28 #include "gdbthread.h"
30 #include "common/gdb_optional.h"
35 struct ui
*ui
= current_ui
;
36 struct serial
*gdb_stdout_serial
;
38 if (deprecated_error_begin_hook
)
39 deprecated_error_begin_hook ();
41 gdb::optional
<target_terminal::scoped_restore_terminal_state
> term_state
;
42 /* While normally there's always something pushed on the target
43 stack, the NULL check is needed here because we can get here very
44 early during startup, before the target stack is first
46 if (current_top_target () != NULL
&& target_supports_terminal_ours ())
48 term_state
.emplace ();
49 target_terminal::ours_for_output ();
52 /* We want all output to appear now, before we print the error. We
53 have 3 levels of buffering we have to flush (it's possible that
54 some of these should be changed to flush the lower-level ones
57 /* 1. The _filtered buffer. */
58 if (filtered_printing_initialized ())
61 /* 2. The stdio buffer. */
62 gdb_flush (gdb_stdout
);
63 gdb_flush (gdb_stderr
);
65 /* 3. The system-level buffer. */
66 gdb_stdout_serial
= serial_fdopen (fileno (ui
->outstream
));
67 if (gdb_stdout_serial
)
69 serial_drain_output (gdb_stdout_serial
);
70 serial_un_fdopen (gdb_stdout_serial
);
73 annotate_error_begin ();
77 print_exception (struct ui_file
*file
, const struct gdb_exception
&e
)
79 /* KLUGE: cagney/2005-01-13: Write the string out one line at a time
80 as that way the MI's behavior is preserved. */
84 for (start
= e
.what (); start
!= NULL
; start
= end
)
86 end
= strchr (start
, '\n');
88 fputs_filtered (start
, file
);
92 ui_file_write (file
, start
, end
- start
);
95 fprintf_filtered (file
, "\n");
97 /* Now append the annotation. */
104 /* Assume that these are all errors. */
108 internal_error (__FILE__
, __LINE__
, _("Bad switch."));
113 exception_print (struct ui_file
*file
, const struct gdb_exception
&e
)
115 if (e
.reason
< 0 && e
.message
!= NULL
)
118 print_exception (file
, e
);
123 exception_fprintf (struct ui_file
*file
, const struct gdb_exception
&e
,
124 const char *prefix
, ...)
126 if (e
.reason
< 0 && e
.message
!= NULL
)
132 /* Print the prefix. */
133 va_start (args
, prefix
);
134 vfprintf_filtered (file
, prefix
, args
);
137 print_exception (file
, e
);
141 /* See exceptions.h. */
144 exception_print_same (const struct gdb_exception
&e1
,
145 const struct gdb_exception
&e2
)
147 const char *msg1
= e1
.message
== nullptr ? "" : e1
.what ();
148 const char *msg2
= e2
.message
== nullptr ? "" : e2
.what ();
150 return (e1
.reason
== e2
.reason
151 && e1
.error
== e2
.error
152 && strcmp (msg1
, msg2
) == 0);