查詢 gdb 的新功能

最近聽 Scott 講到一些 gdb 的好功能, 發現為啥我這裡都沒有, 才發覺原來用的 gdb 版本不同。

要看 gdb 各版的 release note, 得下載 gdb 該版的 tarball, 解開後在 gdb/NEWS 裡有寫詳細的新功能。列一下最近聊到幾個我想用但在 7.2 卻沒有的新功能:

7.3 版: 加速 executable 載入時間的 gdb index:

* GDB now has support for reading and writing a new .gdb_index section. This section holds a fast index of DWARF debugging information and can be used to greatly speed up GDB startup and operation. See the documentation for `save gdb-index' for details.

7.4 版: 不要在離開 scope 時刪掉 watch 的目標變數:

* The "watch" command now accepts an optional "-location" argument. When used, this causes GDB to watch the memory referred to by the exblockquotession. Such a watchpoint is never deleted due to it going out of scope.