ruby-changes:60410
From: Takashi <ko1@a...>
Date: Sun, 15 Mar 2020 19:35:48 +0900 (JST)
Subject: [ruby-changes:60410] a36ead3f4f (ruby_2_7): Prevent unloading methods used in root_fiber while calling another Fiber (#2939)
https://git.ruby-lang.org/ruby.git/commit/?id=a36ead3f4f From a36ead3f4fe801ddaebe6d1ed905e9e3276dbac7 Mon Sep 17 00:00:00 2001 From: Takashi Kokubun <takashikkbn@g...> Date: Fri, 28 Feb 2020 23:58:33 -0800 Subject: Prevent unloading methods used in root_fiber while calling another Fiber (#2939) Fixing SEGVs like: http://ci.rvm.jp/results/trunk-mjit-wait@silicon-docker/2744905 http://ci.rvm.jp/results/trunk-mjit-wait@silicon-docker/2744420 http://ci.rvm.jp/results/trunk-mjit-wait@silicon-docker/2741400 [Bug #16664] (cherry picked from commit adcf0316d1ecedae2a9157ad941550e0c0fb510b) diff --git a/cont.c b/cont.c index 793bce0..a8321ab 100644 --- a/cont.c +++ b/cont.c @@ -1097,6 +1097,15 @@ cont_save_thread(rb_context_t *cont, rb_thread_t *th) https://github.com/ruby/ruby/blob/trunk/cont.c#L1097 } static void +cont_init_mjit_cont(rb_context_t *cont) +{ + VM_ASSERT(cont->mjit_cont == NULL); + if (mjit_enabled) { + cont->mjit_cont = mjit_cont_new(&(cont->saved_ec)); + } +} + +static void cont_init(rb_context_t *cont, rb_thread_t *th) { /* save thread context */ @@ -1105,9 +1114,7 @@ cont_init(rb_context_t *cont, rb_thread_t *th) https://github.com/ruby/ruby/blob/trunk/cont.c#L1114 cont->saved_ec.local_storage = NULL; cont->saved_ec.local_storage_recursive_hash = Qnil; cont->saved_ec.local_storage_recursive_hash_for_trace = Qnil; - if (mjit_enabled) { - cont->mjit_cont = mjit_cont_new(&cont->saved_ec); - } + cont_init_mjit_cont(cont); } static rb_context_t * @@ -1124,6 +1131,14 @@ cont_new(VALUE klass) https://github.com/ruby/ruby/blob/trunk/cont.c#L1131 return cont; } +void +rb_fiber_init_mjit_cont(struct rb_fiber_struct *fiber) +{ + // Currently this function is meant for root_fiber. Others go through cont_new. + // XXX: Is this mjit_cont `mjit_cont_free`d? + cont_init_mjit_cont(&fiber->cont); +} + #if 0 void show_vm_stack(const rb_execution_context_t *ec) diff --git a/internal.h b/internal.h index f2e3862..d5f1b93 100644 --- a/internal.h +++ b/internal.h @@ -1505,9 +1505,11 @@ VALUE rb_dbl_complex_new_polar_pi(double abs, double ang); https://github.com/ruby/ruby/blob/trunk/internal.h#L1505 struct rb_thread_struct; /* cont.c */ +struct rb_fiber_struct; VALUE rb_obj_is_fiber(VALUE); void rb_fiber_reset_root_local_storage(struct rb_thread_struct *); void ruby_register_rollback_func_for_ensure(VALUE (*ensure_func)(VALUE), VALUE (*rollback_func)(VALUE)); +void rb_fiber_init_mjit_cont(struct rb_fiber_struct *fiber); /* debug.c */ PRINTF_ARGS(void ruby_debug_printf(const char*, ...), 1, 2); diff --git a/mjit.c b/mjit.c index df0169e..4dc6ad8 100644 --- a/mjit.c +++ b/mjit.c @@ -801,6 +801,9 @@ mjit_init(const struct mjit_options *opts) https://github.com/ruby/ruby/blob/trunk/mjit.c#L801 rb_native_cond_initialize(&mjit_worker_wakeup); rb_native_cond_initialize(&mjit_gc_wakeup); + // Make sure root_fiber's saved_ec is scanned by mark_ec_units + rb_fiber_init_mjit_cont(GET_EC()->fiber_ptr); + // Initialize class_serials cache for compilation valid_class_serials = rb_hash_new(); rb_obj_hide(valid_class_serials); diff --git a/test/ruby/test_jit.rb b/test/ruby/test_jit.rb index adb6603..e3d8f9c 100644 --- a/test/ruby/test_jit.rb +++ b/test/ruby/test_jit.rb @@ -12,6 +12,10 @@ class TestJIT < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_jit.rb#L12 /\AJIT inline: .+\n\z/, /\ASuccessful MJIT finish\n\z/, ] + MAX_CACHE_PATTERNS = [ + /\AJIT compaction \([^)]+\): .+\n\z/, + /\ANo units can be unloaded -- .+\n\z/, + ] # trace_* insns are not compiled for now... TEST_PENDING_INSNS = RubyVM::INSTRUCTION_NAMES.select { |n| n.start_with?('trace_') }.map(&:to_sym) + [ @@ -611,11 +615,7 @@ class TestJIT < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_jit.rb#L615 end def test_nothing_to_unload_with_jit_wait - ignorable_patterns = [ - /\AJIT compaction \([^)]+\): .+\n\z/, - /\ANo units can be unloaded -- .+\n\z/, - ] - assert_eval_with_jit("#{<<~"begin;"}\n#{<<~"end;"}", stdout: 'hello', success_count: 11, max_cache: 10, ignorable_patterns: ignorable_patterns) + assert_eval_with_jit("#{<<~"begin;"}\n#{<<~"end;"}", stdout: 'hello', success_count: 11, max_cache: 10, ignorable_patterns: MAX_CACHE_PATTERNS) begin; def a1() a2() end def a2() a3() end @@ -632,6 +632,28 @@ class TestJIT < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_jit.rb#L632 end; end + def test_unload_units_on_fiber + assert_eval_with_jit("#{<<~"begin;"}\n#{<<~"end;"}", stdout: 'hello', success_count: 12, max_cache: 10, ignorable_patterns: MAX_CACHE_PATTERNS) + begin; + def a1() a2(false); a2(true) end + def a2(a) a3(a) end + def a3(a) a4(a) end + def a4(a) a5(a) end + def a5(a) a6(a) end + def a6(a) a7(a) end + def a7(a) a8(a) end + def a8(a) a9(a) end + def a9(a) a10(a) end + def a10(a) + if a + Fiber.new { a11 }.resume + end + end + def a11() print('hello') end + a1 + end; + end + def test_unload_units_and_compaction Dir.mktmpdir("jit_test_unload_units_") do |dir| # MIN_CACHE_SIZE is 10 -- cgit v0.10.2 -- ML: ruby-changes@q... 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