Re: [Qemu-devel] [RFC v1 03/11] tcg: comment on which functions have to be called with tb_lock held

[Paolo Bonzini]

On 21/03/2016 22:50, Emilio G. Cota wrote:
> The problem with this approach is that the "point TCG to second buffer"
> is not just a question of pointing code_gen_buffer to a new address;
> we'd have to create a new tcg_ctx struct, since tcg_ctx has quite a few
> elements that are dependent on code_gen_buffer (e.g. s->code_ptr,
> s->code_buf). 

Are these (or other fields similarly dependent on code_gen_buffer) ever
read outside tb_lock?  A quick "git grep -wl" suggests that they are
only used from tcg/, which should only run while tb_lock is held.

If not it would be enough to call tcg_prologue_init from tb_flush.

Paolo