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authork0kubun <k0kubun@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2019-03-18 14:01:52 +0000
committerk0kubun <k0kubun@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2019-03-18 14:01:52 +0000
commitba51ae0109ee1d1fa7ca90b43da115ea68d7214a (patch)
tree3771533d5fad0702364d5552aa5e79b13a1584d4 /mjit_worker.c
parent964bbc1686c7dd42d58da504a6968c90d5a428fd (diff)
Eliminate mjit_copy_job_t reference from mjit_worker
Take 2 of r67287. For some reasons, passing pointer of pointer on stack to a function and assigning an addresse to a pointer dereferenced from the pointer seems not working on mswin. So I achieved to return multiple values by returning struct instead of taking pointers. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67296 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'mjit_worker.c')
-rw-r--r--mjit_worker.c85
1 files changed, 48 insertions, 37 deletions
diff --git a/mjit_worker.c b/mjit_worker.c
index 94eda53..613f61f 100644
--- a/mjit_worker.c
+++ b/mjit_worker.c
@@ -1144,30 +1144,58 @@ int rb_workqueue_register(unsigned flags, rb_postponed_job_func_t , void *);
/* We're lazily copying cache values from main thread because these cache values
could be different between ones on enqueue timing and ones on dequeue timing.
Return true if copy succeeds. */
-static bool
-copy_cache_from_main_thread(mjit_copy_job_t *job)
+static mjit_copy_job_result_t
+copy_cache_from_main_thread(const rb_iseq_t *iseq)
{
+ mjit_copy_job_t *job = &mjit_copy_job; // just a shorthand
+
+ CRITICAL_SECTION_START(3, "in copy_cache_from_main_thread");
+ job->finish_p = true; // disable dispatching this job in mjit_copy_job_handler while it's being modified
+ CRITICAL_SECTION_FINISH(3, "in copy_cache_from_main_thread");
+
+ const struct rb_iseq_constant_body *body = iseq->body;
+ job->iseq = iseq;
+ job->cc_entries = NULL;
+ if (body->ci_size > 0 || body->ci_kw_size > 0)
+ job->cc_entries = alloca(sizeof(struct rb_call_cache) * (body->ci_size + body->ci_kw_size));
+ job->is_entries = NULL;
+ if (body->is_size > 0)
+ job->is_entries = alloca(sizeof(union iseq_inline_storage_entry) * body->is_size);
+
+ if (job->cc_entries == NULL && job->is_entries == NULL) {
+ return (mjit_copy_job_result_t){ .success_p = true, .cc_entries = NULL, .is_entries = NULL };
+ }
+
CRITICAL_SECTION_START(3, "in copy_cache_from_main_thread");
job->finish_p = false; // allow dispatching this job in mjit_copy_job_handler
CRITICAL_SECTION_FINISH(3, "in copy_cache_from_main_thread");
if (UNLIKELY(mjit_opts.wait)) {
mjit_copy_job_handler((void *)job);
- return job->finish_p;
- }
+ } else {
+ if (!rb_workqueue_register(0, mjit_copy_job_handler, (void *)job)) {
+ // Disable dispatching this job in mjit_copy_job_handler while memory allocated by alloca
+ // could be expired after finishing this function.
+ job->finish_p = true;
+ return (mjit_copy_job_result_t){ .success_p = false };
+ }
- if (!rb_workqueue_register(0, mjit_copy_job_handler, (void *)job))
- return false;
- CRITICAL_SECTION_START(3, "in MJIT copy job wait");
- /* checking `stop_worker_p` too because `RUBY_VM_CHECK_INTS(ec)` may not
- lush mjit_copy_job_handler when EC_EXEC_TAG() is not TAG_NONE, and then
- `stop_worker()` could dead lock with this function. */
- while (!job->finish_p && !stop_worker_p) {
- rb_native_cond_wait(&mjit_worker_wakeup, &mjit_engine_mutex);
- verbose(3, "Getting wakeup from client");
+ CRITICAL_SECTION_START(3, "in MJIT copy job wait");
+ /* checking `stop_worker_p` too because `RUBY_VM_CHECK_INTS(ec)` may not
+ lush mjit_copy_job_handler when EC_EXEC_TAG() is not TAG_NONE, and then
+ `stop_worker()` could dead lock with this function. */
+ while (!job->finish_p && !stop_worker_p) {
+ rb_native_cond_wait(&mjit_worker_wakeup, &mjit_engine_mutex);
+ verbose(3, "Getting wakeup from client");
+ }
+ CRITICAL_SECTION_FINISH(3, "in MJIT copy job wait");
}
- CRITICAL_SECTION_FINISH(3, "in MJIT copy job wait");
- return job->finish_p;
+
+ bool finish_p = job->finish_p;
+ // Disable dispatching this job in mjit_copy_job_handler while memory allocated by alloca
+ // could be expired after finishing this function.
+ job->finish_p = true;
+ return (mjit_copy_job_result_t){ .success_p = finish_p, .cc_entries = job->cc_entries, .is_entries = job->is_entries };
}
/* The function implementing a worker. It is executed in a separate
@@ -1176,8 +1204,6 @@ copy_cache_from_main_thread(mjit_copy_job_t *job)
void
mjit_worker(void)
{
- mjit_copy_job_t *job = &mjit_copy_job; /* just a shorthand */
-
#ifndef _MSC_VER
if (pch_status == PCH_NOT_READY) {
make_pch();
@@ -1204,28 +1230,17 @@ mjit_worker(void)
verbose(3, "Getting wakeup from client");
}
unit = get_from_list(&unit_queue);
- if (unit) job->iseq = unit->iseq;
- job->finish_p = true; // disable dispatching this job in mjit_copy_job_handler while it's being modified
CRITICAL_SECTION_FINISH(3, "in worker dequeue");
if (unit) {
- const struct rb_iseq_constant_body *body = unit->iseq->body;
- job->cc_entries = NULL;
- if (body->ci_size > 0 || body->ci_kw_size > 0)
- job->cc_entries = alloca(sizeof(struct rb_call_cache) * (body->ci_size + body->ci_kw_size));
- job->is_entries = NULL;
- if (body->is_size > 0)
- job->is_entries = alloca(sizeof(union iseq_inline_storage_entry) * body->is_size);
-
- /* Copy ISeq's inline caches values to avoid race condition. */
- if (job->cc_entries != NULL || job->is_entries != NULL) {
- if (copy_cache_from_main_thread(job) == false) {
- continue; /* retry postponed_job failure, or stop worker */
- }
+ // Copy mutable values from main threads
+ mjit_copy_job_result_t result = copy_cache_from_main_thread(unit->iseq);
+ if (result.success_p == false) {
+ continue; // retry postponed_job failure, or stop worker
}
// JIT compile
- mjit_func_t func = convert_unit_to_func(unit, job->cc_entries, job->is_entries);
+ mjit_func_t func = convert_unit_to_func(unit, result.cc_entries, result.is_entries);
CRITICAL_SECTION_START(3, "in jit func replace");
while (in_gc) { /* Make sure we're not GC-ing when touching ISeq */
@@ -1248,10 +1263,6 @@ mjit_worker(void)
}
}
- // Disable dispatching this job in mjit_copy_job_handler while memory allocated by alloca
- // could be expired after finishing this function.
- job->finish_p = true;
-
// To keep mutex unlocked when it is destroyed by mjit_finish, don't wrap CRITICAL_SECTION here.
worker_stopped = true;
}