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154 lines
4.0 KiB
C
154 lines
4.0 KiB
C
/* Exception (throw catch) mechanism, for GDB, the GNU debugger.
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Copyright (C) 1986-2020 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "exceptions.h"
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#include "breakpoint.h"
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#include "target.h"
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#include "inferior.h"
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#include "annotate.h"
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#include "ui-out.h"
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#include "serial.h"
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#include "gdbthread.h"
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#include "top.h"
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#include "gdbsupport/gdb_optional.h"
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static void
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print_flush (void)
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{
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struct ui *ui = current_ui;
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struct serial *gdb_stdout_serial;
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if (deprecated_error_begin_hook)
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deprecated_error_begin_hook ();
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gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
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/* While normally there's always something pushed on the target
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stack, the NULL check is needed here because we can get here very
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early during startup, before the target stack is first
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initialized. */
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if (current_top_target () != NULL && target_supports_terminal_ours ())
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{
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term_state.emplace ();
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target_terminal::ours_for_output ();
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}
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/* We want all output to appear now, before we print the error. We
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have 3 levels of buffering we have to flush (it's possible that
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some of these should be changed to flush the lower-level ones
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too): */
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/* 1. The _filtered buffer. */
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if (filtered_printing_initialized ())
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wrap_here ("");
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/* 2. The stdio buffer. */
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gdb_flush (gdb_stdout);
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gdb_flush (gdb_stderr);
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/* 3. The system-level buffer. */
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gdb_stdout_serial = serial_fdopen (fileno (ui->outstream));
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if (gdb_stdout_serial)
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{
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serial_drain_output (gdb_stdout_serial);
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serial_un_fdopen (gdb_stdout_serial);
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}
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annotate_error_begin ();
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}
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static void
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print_exception (struct ui_file *file, const struct gdb_exception &e)
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{
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/* KLUDGE: cagney/2005-01-13: Write the string out one line at a time
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as that way the MI's behavior is preserved. */
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const char *start;
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const char *end;
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for (start = e.what (); start != NULL; start = end)
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{
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end = strchr (start, '\n');
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if (end == NULL)
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fputs_filtered (start, file);
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else
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{
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end++;
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ui_file_write (file, start, end - start);
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}
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}
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fprintf_filtered (file, "\n");
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/* Now append the annotation. */
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switch (e.reason)
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{
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case RETURN_QUIT:
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annotate_quit ();
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break;
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case RETURN_ERROR:
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/* Assume that these are all errors. */
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annotate_error ();
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break;
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default:
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internal_error (__FILE__, __LINE__, _("Bad switch."));
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}
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}
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void
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exception_print (struct ui_file *file, const struct gdb_exception &e)
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{
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if (e.reason < 0 && e.message != NULL)
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{
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print_flush ();
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print_exception (file, e);
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}
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}
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void
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exception_fprintf (struct ui_file *file, const struct gdb_exception &e,
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const char *prefix, ...)
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{
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if (e.reason < 0 && e.message != NULL)
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{
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va_list args;
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print_flush ();
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/* Print the prefix. */
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va_start (args, prefix);
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vfprintf_filtered (file, prefix, args);
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va_end (args);
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print_exception (file, e);
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}
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}
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/* See exceptions.h. */
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int
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exception_print_same (const struct gdb_exception &e1,
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const struct gdb_exception &e2)
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{
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const char *msg1 = e1.message == nullptr ? "" : e1.what ();
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const char *msg2 = e2.message == nullptr ? "" : e2.what ();
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return (e1.reason == e2.reason
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&& e1.error == e2.error
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&& strcmp (msg1, msg2) == 0);
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}
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