Don't rely on weak pointers for eager CodeBlock finalization
https://bugs.webkit.org/show_bug.cgi?id=88465
Reviewed by Gavin Barraclough.
This is incompatible with lazy weak pointer finalization.
I considered just making CodeBlock finalization lazy-friendly, but it
turns out that the heap is already way up in CodeBlock's business when
it comes to finalization, so I decided to finish the job and move full
responsibility for CodeBlock finalization into the heap.
will build.
- debugger/Debugger.cpp: Updated for rename.
(JSC::Heap::deleteAllCompiledCode): Renamed for consistency. Fixed a bug
where we would not delete code for a code block that had been previously
jettisoned. I don't know if this happens in practice -- I mostly did
this to improve consistency with deleteUnmarkedCompiledCode.
(JSC::Heap::deleteUnmarkedCompiledCode): New function, responsible for
eager finalization of unmarked code blocks.
(JSC::Heap::collect): Updated for rename. Updated to call
deleteUnmarkedCompiledCode(), which takes care of jettisoned DFG code
blocks too.
(JSC::Heap::addCompiledCode): Renamed, since this points to all code
now, not just functions.
(Heap): Keep track of all user code, not just functions. This is a
negligible additional overhead, since most code is function code.
(JSC::*::finalize): Removed these functions, since we don't rely on
weak pointer finalization anymore.
(JSC::FunctionExecutable::FunctionExecutable): Moved linked-list stuff
into base class so all executables can be in the list.
(JSC::EvalExecutable::clearCode):
(JSC::ProgramExecutable::clearCode):
(JSC::FunctionExecutable::clearCode): All we need to do is delete our
CodeBlock -- that will delete all of its internal data structures.
(JSC::FunctionExecutable::clearCodeIfNotCompiling): Factored out a helper
function to improve clarity.
(JSC::ExecutableBase): Moved linked-list stuff
into base class so all executables can be in the list.
(JSC::NativeExecutable::create):
(NativeExecutable):
(ScriptExecutable):
(JSC::ScriptExecutable::finishCreation):
(JSC::EvalExecutable::create):
(EvalExecutable):
(JSC::ProgramExecutable::create):
(ProgramExecutable):
(FunctionExecutable):
(JSC::FunctionExecutable::create): Don't use a finalizer -- the heap
will call us back to destroy our code block.
(JSC::FunctionExecutable::discardCode): Renamed to clearCodeIfNotCompiling()
for clarity.
(JSC::FunctionExecutable::isCompiling): New helper function, for clarity.
(JSC::ScriptExecutable::clearCodeVirtual): New helper function, since
the heap needs to make polymorphic calls to clear code.
- runtime/JSGlobalData.cpp:
(JSC::StackPreservingRecompiler::operator()):
- runtime/JSGlobalObject.cpp:
(JSC::DynamicGlobalObjectScope::DynamicGlobalObjectScope): Updated for
renames.
