ruby-changes:70114
From: Alan <ko1@a...>
Date: Thu, 9 Dec 2021 07:00:11 +0900 (JST)
Subject: [ruby-changes:70114] 82bb9cedd3 (master): YJIT: Fix leak in compilation loop
https://git.ruby-lang.org/ruby.git/commit/?id=82bb9cedd3 From 82bb9cedd3fb41fd78d612153c35fdb8c5344d5a Mon Sep 17 00:00:00 2001 From: Alan Wu <XrXr@u...> Date: Wed, 8 Dec 2021 12:24:37 -0500 Subject: YJIT: Fix leak in compilation loop Previously, when there are too many blocks in a batch, the last block in the batch is not tracked in the array of batches and not freed. --- bootstraptest/test_yjit.rb | 12 ++++++++++++ yjit_core.c | 13 ++++++++----- 2 files changed, 20 insertions(+), 5 deletions(-) diff --git a/bootstraptest/test_yjit.rb b/bootstraptest/test_yjit.rb index e50d78a9dc5..2ac37df0a23 100644 --- a/bootstraptest/test_yjit.rb +++ b/bootstraptest/test_yjit.rb @@ -1,3 +1,15 @@ https://github.com/ruby/ruby/blob/trunk/bootstraptest/test_yjit.rb#L1 +assert_normal_exit %q{ + # regression test for a leak caught by an asert on --yjit-call-threshold=2 + Foo = 1 + + eval("def foo = [#{(['Foo,']*256).join}]") + + foo + foo + + Object.send(:remove_const, :Foo) +} + assert_equal '[nil, nil, nil, nil, nil, nil]', %q{ [NilClass, TrueClass, FalseClass, Integer, Float, Symbol].each do |klass| klass.class_eval("def foo = @foo") diff --git a/yjit_core.c b/yjit_core.c index b226f8bd348..02f629d9ce0 100644 --- a/yjit_core.c +++ b/yjit_core.c @@ -747,15 +747,14 @@ gen_block_version(blockid_t blockid, const ctx_t *start_ctx, rb_execution_contex https://github.com/ruby/ruby/blob/trunk/yjit_core.c#L747 // Generate code for the first block block = gen_single_block(blockid, start_ctx, ec); - batch_success = block && compiled_count < MAX_PER_BATCH; - - if (batch_success) { + if (block) { // Track the block add_block_version(block); batch[compiled_count] = block; compiled_count++; } + batch_success = block; // For each successor block to compile while (batch_success) { @@ -780,8 +779,12 @@ gen_block_version(blockid_t blockid, const ctx_t *start_ctx, rb_execution_contex https://github.com/ruby/ruby/blob/trunk/yjit_core.c#L779 // Generate code for the current block using context from the last branch. blockid_t requested_id = last_branch->targets[0]; const ctx_t *requested_ctx = &last_branch->target_ctxs[0]; - block = gen_single_block(requested_id, requested_ctx, ec); - batch_success = block && compiled_count < MAX_PER_BATCH; + + batch_success = compiled_count < MAX_PER_BATCH; + if (batch_success) { + block = gen_single_block(requested_id, requested_ctx, ec); + batch_success = block; + } // If the batch failed, stop if (!batch_success) { -- cgit v1.2.1 -- ML: ruby-changes@q... Info: http://www.atdot.net/~ko1/quickml/