From ee1e9bbb5139d766d70cfa036979cec73a1223b7 Mon Sep 17 00:00:00 2001 From: Tom de Vries Date: Fri, 8 Dec 2023 17:36:35 +0100 Subject: [PATCH] [gdb/tui] Fix displaying main after resizing A TUI src window is displaying either: - the source for the current frame, - the source for main, or - the string "[ No Source Available ]". Since commit 03893ce67b5 ("[gdb/tui] Fix resizing of terminal to 1 or 2 lines") we're able to resize the TUI to 1 line without crashing. I noticed that if TUI is displaying main, and we resize to 1 line (destroying the src window) and then back to a larger terminal (reconstructing the src window), the TUI displays "[ No Source Available ]" instead of main. Fix this by moving the responsibility for showing main from tui_enable to tui_source_window_base::rerender. Tested on x86_64-linux. Approved-By: Tom Tromey --- gdb/testsuite/gdb.tui/resize-one-line.exp | 50 +++++++++++++++++++++++++++++++ gdb/tui/tui-layout.c | 25 ---------------- gdb/tui/tui-winsource.c | 22 +++++++++++++- gdb/tui/tui-winsource.h | 5 ++++ gdb/tui/tui.c | 5 ---- 5 files changed, 76 insertions(+), 31 deletions(-) create mode 100644 gdb/testsuite/gdb.tui/resize-one-line.exp diff --git a/gdb/testsuite/gdb.tui/resize-one-line.exp b/gdb/testsuite/gdb.tui/resize-one-line.exp new file mode 100644 index 00000000000..5f8847cb94b --- /dev/null +++ b/gdb/testsuite/gdb.tui/resize-one-line.exp @@ -0,0 +1,50 @@ +# Copyright 2023 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +# Check that when showing main (because of lack of current frame) in the src +# window, resizing to 1 line and back doesn't change the contents of the src +# window. + +tuiterm_env + +standard_testfile main-one-line.c + +if {[build_executable "failed to prepare" ${testfile} ${srcfile}] == -1} { + return -1 +} + +Term::clean_restart 24 80 $testfile + +if {![Term::enter_tui]} { + unsupported "TUI not supported" + return +} + +# Check that we have a source box containing main. +Term::check_box "source box" 0 0 80 15 +Term::check_region_contents "src window shows main" 0 0 80 15 "main" + +# Resize to a single line. +Term::resize 1 80 0 +Term::wait_for "" + +# Resize back to the previous size. +Term::resize 24 80 0 + +# Check that we still have a source box containing main. +with_test_prefix "after resizing" { + gdb_assert { [Term::wait_for_region_contents 0 0 80 15 "main"] } \ + "src window shows main" +} diff --git a/gdb/tui/tui-layout.c b/gdb/tui/tui-layout.c index 85f4991c769..a4cb5a8b7bf 100644 --- a/gdb/tui/tui-layout.c +++ b/gdb/tui/tui-layout.c @@ -45,8 +45,6 @@ #include "gdb_curses.h" #include "gdbsupport/gdb-safe-ctype.h" -static void extract_display_start_addr (struct gdbarch **, CORE_ADDR *); - /* The layouts. */ static std::vector> layouts; @@ -69,11 +67,6 @@ std::vector tui_windows; void tui_apply_current_layout (bool preserve_cmd_win_size_p) { - struct gdbarch *gdbarch; - CORE_ADDR addr; - - extract_display_start_addr (&gdbarch, &addr); - for (tui_win_info *win_info : tui_windows) win_info->make_visible (false); @@ -108,10 +101,6 @@ tui_apply_current_layout (bool preserve_cmd_win_size_p) /* Replace the global list of active windows. */ tui_windows = std::move (new_tui_windows); - - if (gdbarch == nullptr && TUI_DISASM_WIN != nullptr) - tui_get_begin_asm_address (&gdbarch, &addr); - tui_update_source_windows_with_addr (gdbarch, addr); } /* See tui-layout. */ @@ -284,20 +273,6 @@ tui_remove_some_windows () tui_apply_current_layout (true); } -static void -extract_display_start_addr (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p) -{ - if (TUI_SRC_WIN != nullptr) - TUI_SRC_WIN->display_start_addr (gdbarch_p, addr_p); - else if (TUI_DISASM_WIN != nullptr) - TUI_DISASM_WIN->display_start_addr (gdbarch_p, addr_p); - else - { - *gdbarch_p = nullptr; - *addr_p = 0; - } -} - void tui_win_info::resize (int height_, int width_, int origin_x_, int origin_y_) diff --git a/gdb/tui/tui-winsource.c b/gdb/tui/tui-winsource.c index acbaef95e0c..52c0b5b69a4 100644 --- a/gdb/tui/tui-winsource.c +++ b/gdb/tui/tui-winsource.c @@ -178,6 +178,18 @@ tui_source_window_base::update_source_window_as_is } +/* See tui-winsource.h. */ +void +tui_source_window_base::update_source_window_with_addr (struct gdbarch *gdbarch, + CORE_ADDR addr) +{ + struct symtab_and_line sal {}; + if (addr != 0) + sal = find_pc_line (addr, 0); + + update_source_window (gdbarch, sal); +} + /* Function to ensure that the source and/or disassembly windows reflect the input address. */ void @@ -473,7 +485,15 @@ tui_source_window_base::rerender () update_source_window (gdbarch, cursal); } else - erase_source_content (); + { + CORE_ADDR addr; + struct gdbarch *gdbarch; + tui_get_begin_asm_address (&gdbarch, &addr); + if (addr == 0) + erase_source_content (); + else + update_source_window_with_addr (gdbarch, addr); + } } /* See tui-data.h. */ diff --git a/gdb/tui/tui-winsource.h b/gdb/tui/tui-winsource.h index c2826165a10..523d0ea832b 100644 --- a/gdb/tui/tui-winsource.h +++ b/gdb/tui/tui-winsource.h @@ -183,6 +183,11 @@ public: virtual void display_start_addr (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p) = 0; + /* Function to ensure that the source or disassembly window + reflects the input address. Single window variant of + update_source_windows_with_addr. */ + void update_source_window_with_addr (struct gdbarch *, CORE_ADDR); + private: /* Used for horizontal scroll. */ diff --git a/gdb/tui/tui.c b/gdb/tui/tui.c index 941c65c970f..33aced2e7e3 100644 --- a/gdb/tui/tui.c +++ b/gdb/tui/tui.c @@ -493,11 +493,6 @@ tui_enable (void) tui_resize_all (); } - if (deprecated_safe_get_selected_frame ()) - tui_show_frame_info (deprecated_safe_get_selected_frame ()); - else - tui_display_main (); - /* Install the TUI specific hooks. This must be done after the call to tui_display_main so that we don't detect the symtab changed event it can cause. */ -- 2.11.4.GIT