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If you run "gdb -i=mi2" and set a "display", then when "next"ing the
displays will be shown twice:
~"1: x = 23\n"
~"7\t printf(\"%d\\n\", x);\n"
~"1: x = 23\n"
*stopped,reason="end-stepping-range",frame={addr="0x0000000000400565",func="main",args=[],file="q.c",fullname="/tmp/q.c",line="7"},thread-id="1",stopped-threads="all",core="1"
The immediate cause of this is this code in mi_on_normal_stop_1:
print_stop_event (mi_uiout);
console_interp = interp_lookup (current_ui, INTERP_CONSOLE);
if (should_print_stop_to_console (console_interp, tp))
print_stop_event (mi->cli_uiout);
... which obviously prints the stop twice.
However, I think the first call to print_stop_event is intended just
to emit the MI *stopped notification, which explains why the source
line does not show up two times.
This patch fixes the bug by changing print_stop_event to only call
do_displays for non-MI-like ui-outs.
Tested on x86-64 Fedora 29.
gdb/ChangeLog
2019-03-19 Tom Tromey <tromey@adacore.com>
* mi/mi-interp.c (mi_on_normal_stop_1): Only show displays once.
* infrun.h (print_stop_event): Add "displays" parameter.
* infrun.c (print_stop_event): Add "displays" parameter.
gdb/testsuite/ChangeLog
2019-03-19 Tom Tromey <tromey@adacore.com>
* gdb.mi/mi2-cli-display.c: New file.
* gdb.mi/mi2-cli-display.exp: New file.
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|---|---|---|
| .. | ||
| ChangeLog-1999-2003 | ||
| mi-cmd-break.c | ||
| mi-cmd-break.h | ||
| mi-cmd-catch.c | ||
| mi-cmd-disas.c | ||
| mi-cmd-env.c | ||
| mi-cmd-file.c | ||
| mi-cmd-info.c | ||
| mi-cmd-stack.c | ||
| mi-cmd-target.c | ||
| mi-cmd-var.c | ||
| mi-cmds.c | ||
| mi-cmds.h | ||
| mi-common.c | ||
| mi-common.h | ||
| mi-console.c | ||
| mi-console.h | ||
| mi-getopt.c | ||
| mi-getopt.h | ||
| mi-interp.c | ||
| mi-interp.h | ||
| mi-main.c | ||
| mi-main.h | ||
| mi-out.c | ||
| mi-out.h | ||
| mi-parse.c | ||
| mi-parse.h | ||
| mi-symbol-cmds.c | ||