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Introduce and use flush_streams

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Code in gdbsupport can't call gdb_flush, so this introduces a new
"flush_streams" function that must be supplied by the client.

Note that the similar gdb_flush_out_err exists, but it isn't defined
in quite the same way, so it wasn't clear to me whether the two could
be merged.

gdb/ChangeLog
2020-04-13  Tom Tromey  <tom@tromey.com>

	* utils.c (flush_streams): New function.
	* event-loop.c (gdb_wait_for_event): Call flush_streams.

gdbsupport/ChangeLog
2020-04-13  Tom Tromey  <tom@tromey.com>

	* errors.h (flush_streams): Declare.
This commit is contained in:
Tom Tromey 2020-04-13 12:42:59 -06:00 committed by Tom Tromey
parent 29f2bf4f22
commit c1cd3163d9
5 changed files with 23 additions and 2 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2020-04-13 Tom Tromey <tom@tromey.com>
* utils.c (flush_streams): New function.
* event-loop.c (gdb_wait_for_event): Call flush_streams.
2020-04-13 Tom Tromey <tom@tromey.com> 2020-04-13 Tom Tromey <tom@tromey.com>
* event-loop.c (handle_file_event): Use warning, not * event-loop.c (handle_file_event): Use warning, not

3
gdb/event-loop.c
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@ -663,8 +663,7 @@ gdb_wait_for_event (int block)
int num_found = 0; int num_found = 0;
/* Make sure all output is done before getting another event. */ /* Make sure all output is done before getting another event. */
gdb_stdout->flush (); flush_streams ();
gdb_stderr->flush ();
if (gdb_notifier.num_fds == 0) if (gdb_notifier.num_fds == 0)
return -1; return -1;

9
gdb/utils.c
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@ -691,6 +691,15 @@ malloc_failure (long size)
} }
} }
/* See common/errors.h. */
void
flush_streams ()
{
gdb_stdout->flush ();
gdb_stderr->flush ();
}
/* My replacement for the read system call. /* My replacement for the read system call.
Used like `read' but keeps going if `read' returns too soon. */ Used like `read' but keeps going if `read' returns too soon. */

4
gdbsupport/ChangeLog
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@ -1,3 +1,7 @@
2020-04-13 Tom Tromey <tom@tromey.com>
* errors.h (flush_streams): Declare.
2020-04-13 Tom Tromey <tom@tromey.com> 2020-04-13 Tom Tromey <tom@tromey.com>
* gdb_select.h: Move from ../gdb/. * gdb_select.h: Move from ../gdb/.

4
gdbsupport/errors.h
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@ -87,4 +87,8 @@ extern void perror_with_name (const char *string) ATTRIBUTE_NORETURN;
extern void malloc_failure (long size) ATTRIBUTE_NORETURN; extern void malloc_failure (long size) ATTRIBUTE_NORETURN;
/* Flush stdout and stderr. Must be provided by the client. */
extern void flush_streams ();
#endif /* COMMON_ERRORS_H */ #endif /* COMMON_ERRORS_H */