From 31efaef1d9b80b7803e22ef28ffc51df04db60ab Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Wed, 6 Jul 2016 15:09:29 +0100 Subject: [PATCH] linux-user: Forget about synchronous signal once it is delivered Commit 655ed67c2a248cf which switched synchronous signals to benig recorded in ts->sync_signal rather than in a queue with every other signal had a bug: we failed to clear the flag indicating that a synchronous signal was pending when we delivered it. This meant that we would take the signal again and again every time the guest made a syscall. (This is a bug introduced in my refactoring of Timothy Baldwin's original code.) Fix this by passing in the struct emulated_sigtable* to handle_pending_signal(), so that we clear the pending flag in the ts->sync_signal struct when handling a synchronous signal. Signed-off-by: Peter Maydell Signed-off-by: Riku Voipio --- linux-user/signal.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/linux-user/signal.c b/linux-user/signal.c index 9d980456ec..9a4d894e3a 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -5826,7 +5826,8 @@ long do_rt_sigreturn(CPUArchState *env) #endif -static void handle_pending_signal(CPUArchState *cpu_env, int sig) +static void handle_pending_signal(CPUArchState *cpu_env, int sig, + struct emulated_sigtable *k) { CPUState *cpu = ENV_GET_CPU(cpu_env); abi_ulong handler; @@ -5834,7 +5835,6 @@ static void handle_pending_signal(CPUArchState *cpu_env, int sig) target_sigset_t target_old_set; struct target_sigaction *sa; TaskState *ts = cpu->opaque; - struct emulated_sigtable *k = &ts->sigtab[sig - 1]; trace_user_handle_signal(cpu_env, sig); /* dequeue signal */ @@ -5937,7 +5937,7 @@ void process_pending_signals(CPUArchState *cpu_env) sigact_table[sig - 1]._sa_handler = TARGET_SIG_DFL; } - handle_pending_signal(cpu_env, sig); + handle_pending_signal(cpu_env, sig, &ts->sync_signal); } for (sig = 1; sig <= TARGET_NSIG; sig++) { @@ -5947,7 +5947,7 @@ void process_pending_signals(CPUArchState *cpu_env) if (ts->sigtab[sig - 1].pending && (!sigismember(blocked_set, target_to_host_signal_table[sig]))) { - handle_pending_signal(cpu_env, sig); + handle_pending_signal(cpu_env, sig, &ts->sigtab[sig - 1]); /* Restart scan from the beginning */ sig = 1; } -- 2.11.4.GIT