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80a1a1bb8a
Avoid generating an infinite loop in the case where: 1. Block `first` is adjacent to block `second`, and the branch from `first` to `second` is a fallthrough, and 2. Block `second` immediately exits to the interpreter, and 3. Block `second` is invalidated and YJIT is OOM While pondering how to fix this, I think I've stumbled on another related edge case: 1. Block `incoming_one` and `incoming_two` both branch to block `second`. Block `incoming_one` has a fallthrough 2. Block `second` immediately exits to the interpreter (so it starts with its exit) 3. When Block `second` is invalidated, the incoming fallthrough branch from `incoming_one` might be rewritten first, which overwrites the start of block `second` with a jump to a new branch stub. 4. YJIT runs of out memory 5. The incoming branch from `incoming_two` is then rewritten, but because we're OOM we can't generate a new stub, so we use `second`'s exit as the branch target. However `second`'s exit was already overwritten with a jump to the branch stub for `incoming_one`, so `incoming_two` will end up jumping to `incoming_one`'s branch stub. Fixes [Bug #21257] |
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| .. | ||
| pending.rb | ||
| runner.rb | ||
| test_attr.rb | ||
| test_autoload.rb | ||
| test_block.rb | ||
| test_class.rb | ||
| test_constant_cache.rb | ||
| test_env.rb | ||
| test_eval.rb | ||
| test_exception.rb | ||
| test_fiber.rb | ||
| test_finalizer.rb | ||
| test_flip.rb | ||
| test_flow.rb | ||
| test_fork.rb | ||
| test_gc.rb | ||
| test_insns.rb | ||
| test_io.rb | ||
| test_jump.rb | ||
| test_literal.rb | ||
| test_literal_suffix.rb | ||
| test_load.rb | ||
| test_marshal.rb | ||
| test_massign.rb | ||
| test_method.rb | ||
| test_objectspace.rb | ||
| test_proc.rb | ||
| test_ractor.rb | ||
| test_string.rb | ||
| test_struct.rb | ||
| test_syntax.rb | ||
| test_thread.rb | ||
| test_yjit.rb | ||
| test_yjit_30k_ifelse.rb | ||
| test_yjit_30k_methods.rb | ||
| test_yjit_rust_port.rb | ||