From 0e9a339ec8ffab80fdbe97adaf888fe03b73fe22 Mon Sep 17 00:00:00 2001 From: Yao Qi Date: Thu, 21 Jul 2016 12:12:18 +0100 Subject: [PATCH] Enqueue signal even when resuming threads Nowadays, we only enqueue signal when we leave thread pending in linux_resume_one_thread. If lwp->resume->sig isn't zero (GDB wants to resume with signal), we pass lwp->resume->sig to linux_resume_one_lwp. In order to reduce the difference between resuming thread with signal and proceeding thread with signal, when we resume thread, we can enqueue signal too, and proceed thread. The signal will be consumed in linux_resume_one_lwp_throw from lwp->pending_signals. gdb/gdbserver: 2016-07-21 Yao Qi * linux-low.c (proceed_one_lwp): Declare. (linux_resume_one_thread): Remove local variable 'step'. Lift code enqueue signal. Call proceed_one_lwp instead of linux_resume_one_lwp. --- gdb/gdbserver/ChangeLog | 7 +++++++ gdb/gdbserver/linux-low.c | 41 +++++++++++++++++++-------------------- 2 files changed, 27 insertions(+), 21 deletions(-) diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog index 3130334dd7c..e5aed82b617 100644 --- a/gdb/gdbserver/ChangeLog +++ b/gdb/gdbserver/ChangeLog @@ -1,3 +1,10 @@ +2016-07-21 Yao Qi + + * linux-low.c (proceed_one_lwp): Declare. + (linux_resume_one_thread): Remove local variable 'step'. + Lift code enqueue signal. Call proceed_one_lwp instead of + linux_resume_one_lwp. + 2016-07-21 Yao Qi * linux-low.c (linux_resume_one_thread): Call diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c index c8d0266e465..d9f847d3182 100644 --- a/gdb/gdbserver/linux-low.c +++ b/gdb/gdbserver/linux-low.c @@ -268,6 +268,7 @@ static void enqueue_pending_signal (struct lwp_info *lwp, int signal, siginfo_t static void complete_ongoing_step_over (void); static int linux_low_ptrace_options (int attached); static int check_ptrace_stopped_lwp_gone (struct lwp_info *lp); +static int proceed_one_lwp (struct inferior_list_entry *entry, void *except); /* When the event-loop is doing a step-over, this points at the thread being stepped. */ @@ -4912,7 +4913,6 @@ linux_resume_one_thread (struct inferior_list_entry *entry, void *arg) { struct thread_info *thread = (struct thread_info *) entry; struct lwp_info *lwp = get_thread_lwp (thread); - int step; int leave_all_stopped = * (int *) arg; int leave_pending; @@ -4979,36 +4979,35 @@ linux_resume_one_thread (struct inferior_list_entry *entry, void *arg) || lwp->status_pending_p || leave_all_stopped); + /* If we have a new signal, enqueue the signal. */ + if (lwp->resume->sig != 0) + { + siginfo_t info, *info_p; + + /* If this is the same signal we were previously stopped by, + make sure to queue its siginfo. */ + if (WIFSTOPPED (lwp->last_status) + && WSTOPSIG (lwp->last_status) == lwp->resume->sig + && ptrace (PTRACE_GETSIGINFO, lwpid_of (thread), + (PTRACE_TYPE_ARG3) 0, &info) == 0) + info_p = &info; + else + info_p = NULL; + + enqueue_pending_signal (lwp, lwp->resume->sig, info_p); + } + if (!leave_pending) { if (debug_threads) debug_printf ("resuming LWP %ld\n", lwpid_of (thread)); - step = (lwp->resume->kind == resume_step); - linux_resume_one_lwp (lwp, step, lwp->resume->sig, NULL); + proceed_one_lwp (entry, NULL); } else { if (debug_threads) debug_printf ("leaving LWP %ld stopped\n", lwpid_of (thread)); - - /* If we have a new signal, enqueue the signal. */ - if (lwp->resume->sig != 0) - { - siginfo_t info, *info_p; - - /* If this is the same signal we were previously stopped by, - make sure to queue its siginfo. */ - if (WIFSTOPPED (lwp->last_status) - && WSTOPSIG (lwp->last_status) == lwp->resume->sig - && ptrace (PTRACE_GETSIGINFO, lwpid_of (thread), - (PTRACE_TYPE_ARG3) 0, &info) == 0) - info_p = &info; - else - info_p = NULL; - - enqueue_pending_signal (lwp, lwp->resume->sig, info_p); - } } thread->last_status.kind = TARGET_WAITKIND_IGNORE; -- 2.39.2