From 3844e605e61777555aed09ab8ce88db2da95bc0b Mon Sep 17 00:00:00 2001 From: Pedro Alves Date: Thu, 13 Jun 2019 00:06:52 +0100 Subject: [PATCH] Fix latent bug with custom word point completers Completion routines that use a custom word point, and that then recurse into complete_line (e.g., if we make "thread apply" a custom word point completer, and complete on the command passed as argument), we stumble on this latent bug: (gdb) thread apply all pri[TAB] (gdb) thread apply all priprint The problem is that there's a spot in complete_line_internal_1 that rewinds the completion word but does not reflect that change in the custom word point in the tracker. This patch fixes it. gdb/ChangeLog: 2019-06-13 Pedro Alves * completer.c (complete_line_internal_1): Rewind completion word point. (completion_tracker::advance_custom_word_point_by): Change parameter type to int. * completer.h (completion_tracker::advance_custom_word_point_by): Likewise. --- gdb/ChangeLog | 9 +++++++++ gdb/completer.c | 5 ++++- gdb/completer.h | 2 +- 3 files changed, 14 insertions(+), 2 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 19b2a7dc76..cd81cfea35 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,12 @@ +2019-06-13 Pedro Alves + + * completer.c (complete_line_internal_1): Rewind completion word + point. + (completion_tracker::advance_custom_word_point_by): Change + parameter type to int. + * completer.h (completion_tracker::advance_custom_word_point_by): + Likewise. + 2019-06-13 Pedro Alves * completer.c (advance_to_completion_word): Handle delimiters. diff --git a/gdb/completer.c b/gdb/completer.c index 03d0d0e5db..5dd9a99f2a 100644 --- a/gdb/completer.c +++ b/gdb/completer.c @@ -1403,6 +1403,9 @@ complete_line_internal_1 (completion_tracker &tracker, break; } + /* Move the custom word point back too. */ + tracker.advance_custom_word_point_by (q - p); + if (reason != handle_brkchars) complete_on_cmdlist (result_list, tracker, q, word, ignore_help_classes); @@ -1972,7 +1975,7 @@ completion_tracker::recompute_lowest_common_denominator /* See completer.h. */ void -completion_tracker::advance_custom_word_point_by (size_t len) +completion_tracker::advance_custom_word_point_by (int len) { m_custom_word_point += len; } diff --git a/gdb/completer.h b/gdb/completer.h index 38a0132ca4..27371b63a5 100644 --- a/gdb/completer.h +++ b/gdb/completer.h @@ -357,7 +357,7 @@ public: { m_custom_word_point = point; } /* Advance the custom word point by LEN. */ - void advance_custom_word_point_by (size_t len); + void advance_custom_word_point_by (int len); /* Whether to tell readline to skip appending a whitespace after the completion. See m_suppress_append_ws. */