Commit b67cb68b authored by Alex Bennée's avatar Alex Bennée Committed by Richard Henderson
Browse files

linux-user: enable parallel code generation on clone 



The variable parallel_cpus controls the generation of thread aware
atomic code.  We only need to set it once we clone our first thread.
At this point any existing translations need to be thrown away.

Reviewed-by: default avatarEmilio G. Cota <cota@braap.org>
Signed-off-by: default avatarAlex Bennée <alex.bennee@linaro.org>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent fdbc2b57

linux-user/syscall.c

+8 −0
Original line number Diff line number Diff line
@@ -6164,6 +6164,14 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp, 
        sigfillset(&sigmask);

        sigprocmask(SIG_BLOCK, &sigmask, &info.sigmask);



        /* If this is our first additional thread, we need to ensure we

         * generate code for parallel execution and flush old translations.

         */

        if (!parallel_cpus) {

            parallel_cpus = true;

            tb_flush(cpu);

        }



        ret = pthread_create(&info.thread, &attr, clone_func, &info);

        /* TODO: Free new CPU state if thread creation failed.  */