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Revert "Request inline cache values from mjit_compile"

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This reverts commit 4161674b2f.

Revert "Eliminate mjit_copy_job_t reference from mjit_worker"

This reverts commit d86a1aa045.

Reverting them because of CI failures

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67291 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
k0kubun 2019-03-18 01:52:45 +00:00
parent ba03222da8
commit 908b530112
3 changed files with 50 additions and 69 deletions
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2
mjit.h
View file

@ -64,7 +64,7 @@ extern void mjit_add_iseq_to_process(const rb_iseq_t *iseq);
extern VALUE mjit_wait_call(rb_execution_context_t *ec, struct rb_iseq_constant_body *body);
RUBY_SYMBOL_EXPORT_END
extern bool mjit_compile(FILE *f, const rb_iseq_t *iseq, const char *funcname);
extern bool mjit_compile(FILE *f, const struct rb_iseq_constant_body *body, const char *funcname, struct rb_call_cache *cc_entries, union iseq_inline_storage_entry *is_entries);
extern void mjit_init(struct mjit_options *opts);
extern void mjit_postponed_job_register_start_hook(void);
extern void mjit_postponed_job_register_finish_hook(void);

10
mjit_compile.c
View file

@ -196,14 +196,10 @@ compile_cancel_handler(FILE *f, const struct rb_iseq_constant_body *body, struct
fprintf(f, " return Qundef;\n");
}
extern bool mjit_copy_cache_from_main_thread(const rb_iseq_t *iseq, struct rb_call_cache **cc_entries, union iseq_inline_storage_entry **is_entries);
// Compile ISeq to C code in `f`. It returns true if it succeeds to compile.
bool
mjit_compile(FILE *f, const rb_iseq_t *iseq, const char *funcname)
mjit_compile(FILE *f, const struct rb_iseq_constant_body *body, const char *funcname, struct rb_call_cache *cc_entries, union iseq_inline_storage_entry *is_entries)
{
const struct rb_iseq_constant_body *body = iseq->body;
struct compile_status status;
status.success = true;
status.local_stack_p = !body->catch_except_p;
@ -211,8 +207,8 @@ mjit_compile(FILE *f, const rb_iseq_t *iseq, const char *funcname)
if (status.stack_size_for_pos == NULL)
return false;
memset(status.stack_size_for_pos, NOT_COMPILED_STACK_SIZE, sizeof(int) * body->iseq_size);
if (mjit_copy_cache_from_main_thread(iseq, &status.cc_entries, &status.is_entries) == false)
return false;
status.cc_entries = cc_entries;
status.is_entries = is_entries;
/* For performance, we verify stack size only on compilation time (mjit_compile.inc.erb) without --jit-debug */
if (!mjit_opts.debug) {

99
mjit_worker.c
View file

@ -986,7 +986,7 @@ compile_prelude(FILE *f)
/* Compile ISeq in UNIT and return function pointer of JIT-ed code.
It may return NOT_COMPILED_JIT_ISEQ_FUNC if something went wrong. */
static mjit_func_t
convert_unit_to_func(struct rb_mjit_unit *unit)
convert_unit_to_func(struct rb_mjit_unit *unit, struct rb_call_cache *cc_entries, union iseq_inline_storage_entry *is_entries)
{
char c_file_buff[MAXPATHLEN], *c_file = c_file_buff, *so_file, funcname[35]; /* TODO: reconsider `35` */
int fd;
@ -1067,7 +1067,7 @@ convert_unit_to_func(struct rb_mjit_unit *unit)
verbose(2, "start compilation: %s@%s:%d -> %s", label, path, lineno, c_file);
fprintf(f, "/* %s@%s:%d */\n\n", label, path, lineno);
}
bool success = mjit_compile(f, unit->iseq, funcname);
bool success = mjit_compile(f, unit->iseq->body, funcname, cc_entries, is_entries);
/* release blocking mjit_gc_start_hook */
CRITICAL_SECTION_START(3, "after mjit_compile to wakeup client for GC");
@ -1141,66 +1141,33 @@ static void mjit_copy_job_handler(void *data);
/* vm_trace.c */
int rb_workqueue_register(unsigned flags, rb_postponed_job_func_t , void *);
// Copy inline cache values of `iseq` to `*cc_entries` and `*is_entries`.
// Return true if copy succeeds or is not needed.
//
// 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.
bool
mjit_copy_cache_from_main_thread(const rb_iseq_t *iseq, struct rb_call_cache **cc_entries, union iseq_inline_storage_entry **is_entries)
/* 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)
{
mjit_copy_job_t *job = &mjit_copy_job; // just a short hand
CRITICAL_SECTION_START(3, "in mjit_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 mjit_copy_cache_from_main_thread");
const struct rb_iseq_constant_body *body = 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);
// If ISeq has no inline cache, there's no need to run a copy job.
if (job->cc_entries == NULL && job->is_entries == NULL) {
*cc_entries = job->cc_entries;
*is_entries = job->is_entries;
return true;
}
CRITICAL_SECTION_START(3, "in mjit_copy_cache_from_main_thread");
job->iseq = iseq; // Prevernt GC of this ISeq from here
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 mjit_copy_cache_from_main_thread");
CRITICAL_SECTION_FINISH(3, "in copy_cache_from_main_thread");
if (UNLIKELY(mjit_opts.wait)) {
mjit_copy_job_handler((void *)job);
} else if (rb_workqueue_register(0, mjit_copy_job_handler, (void *)job)) {
return job->finish_p;
}
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.
/* 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");
}
// Set result values.
*cc_entries = job->cc_entries;
*is_entries = job->is_entries;
bool result = job->finish_p;
CRITICAL_SECTION_START(3, "in mjit_copy_cache_from_main_thread");
job->iseq = NULL; // Allow GC of this ISeq from here
// 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;
CRITICAL_SECTION_FINISH(3, "in mjit_copy_cache_from_main_thread");
return result;
return job->finish_p;
}
/* The function implementing a worker. It is executed in a separate
@ -1209,6 +1176,8 @@ mjit_copy_cache_from_main_thread(const rb_iseq_t *iseq, struct rb_call_cache **c
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();
@ -1235,16 +1204,28 @@ 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) {
// JIT compile
mjit_func_t func = convert_unit_to_func(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);
// `mjit_copy_cache_from_main_thread` in `mjit_compile` may wait for a long time
// and worker may be stopped during the compilation.
if (stop_worker_p)
break;
/* 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 */
}
}
// JIT compile
mjit_func_t func = convert_unit_to_func(unit, job->cc_entries, job->is_entries);
CRITICAL_SECTION_START(3, "in jit func replace");
while (in_gc) { /* Make sure we're not GC-ing when touching ISeq */
@ -1267,6 +1248,10 @@ 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;
}