/* Exception (throw catch) mechanism, for GDB, the GNU debugger.
- Copyright (C) 1986-2015 Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "ui-out.h"
#include "serial.h"
#include "gdbthread.h"
-
-const struct gdb_exception exception_none = { 0, GDB_NO_ERROR, NULL };
-
-void
-prepare_to_throw_exception (void)
-{
- clear_quit_flag ();
- immediate_quit = 0;
-}
+#include "top.h"
+#include "gdbsupport/gdb_optional.h"
static void
print_flush (void)
{
+ struct ui *ui = current_ui;
struct serial *gdb_stdout_serial;
if (deprecated_error_begin_hook)
deprecated_error_begin_hook ();
+ gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
if (target_supports_terminal_ours ())
- target_terminal_ours ();
+ {
+ term_state.emplace ();
+ target_terminal::ours_for_output ();
+ }
/* We want all output to appear now, before we print the error. We
have 3 levels of buffering we have to flush (it's possible that
gdb_flush (gdb_stderr);
/* 3. The system-level buffer. */
- gdb_stdout_serial = serial_fdopen (1);
+ gdb_stdout_serial = serial_fdopen (fileno (ui->outstream));
if (gdb_stdout_serial)
{
serial_drain_output (gdb_stdout_serial);
}
static void
-print_exception (struct ui_file *file, struct gdb_exception e)
+print_exception (struct ui_file *file, const struct gdb_exception &e)
{
- /* KLUGE: cagney/2005-01-13: Write the string out one line at a time
+ /* KLUDGE: cagney/2005-01-13: Write the string out one line at a time
as that way the MI's behavior is preserved. */
const char *start;
const char *end;
- for (start = e.message; start != NULL; start = end)
+ for (start = e.what (); start != NULL; start = end)
{
end = strchr (start, '\n');
if (end == NULL)
else
{
end++;
- ui_file_write (file, start, end - start);
+ file->write (start, end - start);
}
}
fprintf_filtered (file, "\n");
}
void
-exception_print (struct ui_file *file, struct gdb_exception e)
+exception_print (struct ui_file *file, const struct gdb_exception &e)
{
if (e.reason < 0 && e.message != NULL)
{
}
void
-exception_fprintf (struct ui_file *file, struct gdb_exception e,
+exception_fprintf (struct ui_file *file, const struct gdb_exception &e,
const char *prefix, ...)
{
if (e.reason < 0 && e.message != NULL)
}
}
-/* Call FUNC(UIOUT, FUNC_ARGS) but wrapped within an exception
- handler. If an exception (enum return_reason) is thrown using
- throw_exception() than all cleanups installed since
- catch_exceptions() was entered are invoked, the (-ve) exception
- value is then returned by catch_exceptions. If FUNC() returns
- normally (with a positive or zero return value) then that value is
- returned by catch_exceptions(). It is an internal_error() for
- FUNC() to return a negative value.
-
- See exceptions.h for further usage details.
-
- Must not be called with immediate_quit in effect (bad things might
- happen, say we got a signal in the middle of a memcpy to quit_return).
- This is an OK restriction; with very few exceptions immediate_quit can
- be replaced by judicious use of QUIT. */
-
-/* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with
- error() et al. could maintain a set of flags that indicate 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
- initialized the longjmp buffers. */
+/* See exceptions.h. */
int
-catch_exceptions (struct ui_out *uiout,
- catch_exceptions_ftype *func,
- void *func_args,
- return_mask mask)
+exception_print_same (const struct gdb_exception &e1,
+ const struct gdb_exception &e2)
{
- return catch_exceptions_with_msg (uiout, func, func_args, NULL, mask);
-}
-
-int
-catch_exceptions_with_msg (struct ui_out *func_uiout,
- catch_exceptions_ftype *func,
- void *func_args,
- char **gdberrmsg,
- return_mask mask)
-{
- volatile struct gdb_exception exception;
- volatile int val = 0;
- struct ui_out *saved_uiout;
-
- /* Save and override the global ``struct ui_out'' builder. */
- saved_uiout = current_uiout;
- current_uiout = func_uiout;
-
- TRY_CATCH (exception, RETURN_MASK_ALL)
- {
- val = (*func) (current_uiout, func_args);
- }
-
- /* Restore the global builder. */
- current_uiout = saved_uiout;
-
- if (exception.reason < 0 && (mask & RETURN_MASK (exception.reason)) == 0)
- {
- /* The caller didn't request that the event be caught.
- Rethrow. */
- throw_exception (exception);
- }
-
- exception_print (gdb_stderr, exception);
- gdb_assert (val >= 0);
- gdb_assert (exception.reason <= 0);
- if (exception.reason < 0)
- {
- /* If caller wants a copy of the low-level error message, make
- one. This is used in the case of a silent error whereby the
- caller may optionally want to issue the message. */
- if (gdberrmsg != NULL)
- {
- if (exception.message != NULL)
- *gdberrmsg = xstrdup (exception.message);
- else
- *gdberrmsg = NULL;
- }
- return exception.reason;
- }
- return val;
-}
-
-/* This function is superseded by catch_exceptions(). */
-
-int
-catch_errors (catch_errors_ftype *func, void *func_args, char *errstring,
- return_mask mask)
-{
- volatile int val = 0;
- volatile struct gdb_exception exception;
- struct ui_out *saved_uiout;
-
- /* Save the global ``struct ui_out'' builder. */
- saved_uiout = current_uiout;
-
- TRY_CATCH (exception, RETURN_MASK_ALL)
- {
- val = func (func_args);
- }
-
- /* Restore the global builder. */
- current_uiout = saved_uiout;
-
- if (exception.reason < 0 && (mask & RETURN_MASK (exception.reason)) == 0)
- {
- /* The caller didn't request that the event be caught.
- Rethrow. */
- throw_exception (exception);
- }
+ const char *msg1 = e1.message == nullptr ? "" : e1.what ();
+ const char *msg2 = e2.message == nullptr ? "" : e2.what ();
- exception_fprintf (gdb_stderr, exception, "%s", errstring);
- if (exception.reason != 0)
- return 0;
- return val;
+ return (e1.reason == e2.reason
+ && e1.error == e2.error
+ && strcmp (msg1, msg2) == 0);
}
projects / deliverable / binutils-gdb.git / blobdiff