Emacs/GDB:始终使用gdb-many-windows在特定窗口中显示源代码

Question

我在Emacs 24中使用GDB gdb-many-windows设置为t,通常在自己的框架中.我喜欢有一个单独的编辑框架.它看起来像这样(为我粗略的ASCII图表道歉):

+-------------+-------------+
| gdb         | locals      |
+-------------+-------------+
| source      | I/O         |
|             |             |
+-------------+-------------+
| stack       | breakpoints |
+-------------+-------------+

除了一个大问题之外,这很有效.每当gdb需要显示不同的源缓冲区时,例如,在上/下/步之后,它并不总是在"源"窗口中显示它.例如,如果我在不同帧的窗口中打开相同的缓冲区,它将提升该帧,同时将键盘焦点保持在gdb帧中.当帧相互覆盖时,这在单显示器设置上非常烦人.

我希望gdb始终使用gdb-many-windows设置中的源窗口来显示源,无论是否在其他地方显示相同的源缓冲区.我怎样才能做到这一点？

---

编辑:更详细的重现说明.我正在使用Emacs 24.2.1和GDB 7.5-ubuntu.我在Ubuntu 10.04和Linux Mint Nadia与Cinnamon上看到过这个问题.

• 评估此表达式: (setq gdb-many-windows t)
• 使用至少两个文件编译C程序.

例如:

// foo.c
void bar(int);
void foo(int c) {
  if (c > 0)
    bar(c - 1);
}
int main(void) {
  foo(100);
  return 0;
}

// bar.c
void foo(int c);
void bar(int c) {
  if (c > 0)
    foo(c - 2);
}

// compile with gcc -g -O0 foo.c bar.c -o test

• 让bar.c显示在主框架中.打开一个新框架M-x 5 2.在该框架中,使用启动gdb M-x gdb.如上图所示,该帧中应该有六个窗口.将gdb框架放在源框架的顶部.
• 设置断点main并逐步调用foo和bar.当bar被调用时,主框架将在GDB架升起,因为bar.c已经可见有,但键盘焦点将停留在gdb的框架.

我认为问题功能gdb-display-source-buffer在gud.el.gz中.我打算尝试重写这个defadvice,但我并不熟悉建议.如果我搞清楚了,我会在这里发一个答案.

Answer 1

我的是24.3 而且我无法重现这个版本的问题。看起来gud-display-line如下：

(defun gud-display-line (true-file line)
  (let* ((last-nonmenu-event t)  ; Prevent use of dialog box for questions.
     (buffer
      (with-current-buffer gud-comint-buffer
        (gud-find-file true-file)))
     (window (and buffer
              (or (get-buffer-window buffer)
              (display-buffer buffer))))
     (pos))
    (when buffer
      (with-current-buffer buffer
    (unless (or (verify-visited-file-modtime buffer) gud-keep-buffer)
      (if (yes-or-no-p
           (format "File %s changed on disk.  Reread from disk? "
               (buffer-name)))
          (revert-buffer t t)
        (setq gud-keep-buffer t)))
    (save-restriction
      (widen)
      (goto-char (point-min))
      (forward-line (1- line))
      (setq pos (point))
      (or gud-overlay-arrow-position
          (setq gud-overlay-arrow-position (make-marker)))
      (set-marker gud-overlay-arrow-position (point) (current-buffer))
      ;; If they turned on hl-line, move the hl-line highlight to
      ;; the arrow's line.
      (when (featurep 'hl-line)
        (cond
         (global-hl-line-mode
          (global-hl-line-highlight))
         ((and hl-line-mode hl-line-sticky-flag)
          (hl-line-highlight)))))
    (cond ((or (< pos (point-min)) (> pos (point-max)))
           (widen)
           (goto-char pos))))
      (when window
    (set-window-point window gud-overlay-arrow-position)
    (if (eq gud-minor-mode 'gdbmi)
        (setq gdb-source-window window))))))

设置window和你的完全不同。也许，上面的代码很有帮助，或者也许您应该升级到新的 gud/gdb 东西。