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LibJS+LibWeb: Use InterpreterStack for all execution context allocation

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Replace alloca-based execution context allocation with InterpreterStack
bump allocation across all call sites: bytecode call instructions,
AbstractOperations call/construct, script evaluation, module evaluation,
and LibWeb module script evaluation.

Also replace the native stack space check with an InterpreterStack
exhaustion check, and remove the now-unused alloca macros from
ExecutionContext.h.
This commit is contained in:
Andreas Kling
2026-03-04 10:32:01 +01:00
committed by Andreas Kling
parent 0c5e4ebc18
commit 4e0e16e510
Notes: github-actions[bot] 2026-03-04 17:54:33 +00:00 
Author: https://github.com/awesomekling
Commit: https://github.com/LadybirdBrowser/ladybird/commit/4e0e16e5108
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/8270
7 changed files with 88 additions and 52 deletions
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8
Libraries/LibJS/SourceTextModule.cpp
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@@ -765,8 +765,12 @@ ThrowCompletionOr<void> SourceTextModule::execute_module(VM& vm, GC::Ptr<Promise
}
// 1. Let moduleContext be a new ECMAScript code execution context.
ExecutionContext* module_context = nullptr;
ALLOCATE_EXECUTION_CONTEXT_ON_NATIVE_STACK(module_context, registers_and_locals_count, constants_count, 0);
auto& stack = vm.interpreter_stack();
auto* stack_mark = stack.top();
auto* module_context = stack.allocate(registers_and_locals_count, constants_count, 0);
if (!module_context) [[unlikely]]
return vm.throw_completion<InternalError>(ErrorType::CallStackSizeExceeded);
ScopeGuard deallocate_guard = [&stack, stack_mark] { stack.deallocate(stack_mark); };
// 2. Set the Function of moduleContext to null.