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translate-all: notify plugin code of tb_flush

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Plugins might allocate per-TB data that then they get passed each
time a TB is executed (via the *userdata pointer).

Notify plugin code every time a code cache flush occurs, so
that plugins can then reclaim the memory of the per-TB data.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
This commit is contained in:
Emilio G. Cota 2018-10-21 13:17:32 -04:00 • committed by Alex Bennée
parent 235537fa73
commit 5025bb7fde
1 changed files with 6 additions and 0 deletions
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6
accel/tcg/translate-all.c
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@ -1231,6 +1231,8 @@ static gboolean tb_host_size_iter(gpointer key, gpointer value, gpointer data)
/* flush all the translation blocks */ /* flush all the translation blocks */
static void do_tb_flush(CPUState *cpu, run_on_cpu_data tb_flush_count) static void do_tb_flush(CPUState *cpu, run_on_cpu_data tb_flush_count)
{ {
bool did_flush = false;
mmap_lock(); mmap_lock();
/* If it is already been done on request of another CPU, /* If it is already been done on request of another CPU,
* just retry. * just retry.
@ -1238,6 +1240,7 @@ static void do_tb_flush(CPUState *cpu, run_on_cpu_data tb_flush_count)
if (tb_ctx.tb_flush_count != tb_flush_count.host_int) { if (tb_ctx.tb_flush_count != tb_flush_count.host_int) {
goto done; goto done;
} }
did_flush = true;
if (DEBUG_TB_FLUSH_GATE) { if (DEBUG_TB_FLUSH_GATE) {
size_t nb_tbs = tcg_nb_tbs(); size_t nb_tbs = tcg_nb_tbs();
@ -1262,6 +1265,9 @@ static void do_tb_flush(CPUState *cpu, run_on_cpu_data tb_flush_count)
done: done:
mmap_unlock(); mmap_unlock();
if (did_flush) {
qemu_plugin_flush_cb();
}
} }
void tb_flush(CPUState *cpu) void tb_flush(CPUState *cpu)