Jinoh Kang : winedbg: Buffer output of GDB qXfer commands for proper slicing.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 26aee726fb3dcf7615824cb51231964c04648eaa
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=26aee726fb3dcf7615824cb51231964c04648eaa

Author: Jinoh Kang <jinoh.kang.kr at gmail.com>
Date:   Wed Nov 24 00:10:01 2021 +0900

winedbg: Buffer output of GDB qXfer commands for proper slicing.

Today, gdbproxy reuses the same buffer for both the qXfer reply and the
actual GDB packet reply.  This worked well, since each byte in the qXfer
reply buffer matched 1:1 to each byte in the actual GDB reply packet.

Since we escape special characters now, this property no longer holds
and a single byte in qXfer reply will take up to two bytes in the GDB
reply packet.  This causes offsets to shift, preventing the
offset/length response slicing (part of GDB protocol) from working
correctly.

Fix this by writing the qXfer reply data in a separate buffer, and
performing slicing out of it.

Signed-off-by: Jinoh Kang <jinoh.kang.kr at gmail.com>
Signed-off-by: Rémi Bernon <rbernon at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 programs/winedbg/gdbproxy.c | 264 +++++++++++++++++++++++---------------------
 1 file changed, 137 insertions(+), 127 deletions(-)

Diff:   https://source.winehq.org/git/wine.git/?a=commitdiff;h=26aee726fb3dcf7615824cb51231964c04648eaa