From a44294f5ed9fe09fdfc9427f6f83677843590524 Mon Sep 17 00:00:00 2001 From: Jon Turney Date: Mon, 26 Sep 2016 15:45:28 +0100 Subject: [PATCH] Remove a spurious target_terminal::ours() from windows_nat_target::wait() This causes the inferior to stop with SIGTTIN if it tries to read from the terminal after it has been continued. See https://cygwin.com/ml/cygwin/2016-09/msg00285.html for reproduction. Since MinGW doesn't have a tcsetpgrp(), I don't think this problem would be observed there, but Cygwin does so target_terminal::ours() will call it. Calling target_terminal::ours() here seems to be is no longer appropriate after the "Merge async and sync code paths" changes (as the inferior is now in a separate process group even in sync mode(?), which is always used on Windows targets) This call was added in commit c44537cf (and see https://sourceware.org/ml/gdb-patches/2007-02/msg00167.html for what it fixed, which is not regressed by this change) When windows_nat_target::wait() is entered, the inferior is running (either it's been just been started or attached to, or windows_continue() was called), so grabbing the controlling terminal away from it here seems to be wrong, since infrun.c takes care of calling target_terminal::ours() when the inferior stops. gdb/ChangeLog: 2018-08-02 Jon Turney * windows-nat.c (windows_nat_target::wait): Remove a spurious target_terminal::ours(). --- gdb/ChangeLog | 5 +++++ gdb/windows-nat.c | 2 -- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 8abb2ec..9aa3297 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,8 @@ +2018-08-02 Jon Turney + + * windows-nat.c (windows_nat_target::wait): Remove a spurious + target_terminal::ours(). + 2018-09-23 Simon Marchi * aarch64-linux-tdep.c (aarch64_linux_supply_sve_regset): Change type diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c index da66349..0047a26 100644 --- a/gdb/windows-nat.c +++ b/gdb/windows-nat.c @@ -1705,8 +1705,6 @@ windows_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, { int pid = -1; - target_terminal::ours (); - /* We loop when we get a non-standard exception rather than return with a SPURIOUS because resume can try and step or modify things, which needs a current_thread->h. But some of these exceptions mark -- 2.7.4