是否可以将 python gdb 变量捕获到值历史记录中？

Question

我有一个 python gdb script which writes to gdb.STDOUT, and I'd like to capture this value into the value history or a convenience variable 以便于参考。

例如，此脚本迭代一个链表并转储输出：

(gdb) list MY_OBJECT Links myObjectList 4
(MY_OBJECT *) 0x80f830198
{ReferenceCount = 1, Flags = 0, Mutex = {Mutex = 0x80f80fe50, State = 1}, Links = {Next = 0x81182f138, Prev = 0x80f80f5a8}}
(MY_OBJECT *) 0x81182f0d8
{ReferenceCount = 6, Flags = 0, Mutex = {Mutex = 0x811815790, State = 1}, Links = {Next = 0x81182f1f8, Prev = 0x80f8301f8}}
(MY_OBJECT *) 0x81182f198
{ReferenceCount = 2, Flags = 0, Mutex = {Mutex = 0x811816830, State = 1}, Links = {Next = 0x80f8302b8, Prev = 0x81182f138}}
(MY_OBJECT *) 0x80f830258
{ReferenceCount = 1, Flags = 0, Mutex = {Mutex = 0x80f8528e0, State = 1}, Links = {Next = 0x80f80f5a8, Prev = 0x81182f1f8}}

是否可以写入 gdb 值历史记录？也许通过 gdb.parse_and_eval()?

Answer 1

我通过实验发现，您可以直接从 python api 命令执行 gdb 命令，它们将被捕获到值历史记录中。

因此，与其使用 python 中的 gdb.write("%s" % myObject) 或 print，不如使用 gdb.execute("print %s" % myObject)，这会产生所需的副作用。

(gdb) list MY_OBJECT Links myObjectList 4
 = {ReferenceCount = 1, Flags = 0, Mutex = {Mutex = 0x80f80fe50, State = 1}, Links = {Next = 0x81182f138, Prev = 0x80f80f5a8}}
 = {ReferenceCount = 6, Flags = 0, Mutex = {Mutex = 0x811815790, State = 1}, Links = {Next = 0x81182f1f8, Prev = 0x80f8301f8}}
 = {ReferenceCount = 2, Flags = 0, Mutex = {Mutex = 0x811816830, State = 1}, Links = {Next = 0x80f8302b8, Prev = 0x81182f138}}
 = {ReferenceCount = 1, Flags = 0, Mutex = {Mutex = 0x80f8528e0, State = 1}, Links = {Next = 0x80f80f5a8, Prev = 0x81182f1f8}}

(gdb) print &
 = (MY_OBJECT *) 0x80f830198

是否可以将 python gdb 变量捕获到值历史记录中？

Is it possible to capture python gdb variables into the value history?

c

python

gdb