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https://github.com/LadybirdBrowser/ladybird.git
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0c5e4ebc18
Add a managed bump allocator backed by an 8 MB mmap region to replace alloca-based execution context allocation. Pages are committed on demand by the OS, so only the memory actually touched is resident. The InterpreterStack is stored as a member of VM and provides simple LIFO allocation and deallocation of ExecutionContext frames.
25 lines
509 B
C++
25 lines
509 B
C++
/*
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* Copyright (c) 2026, the Ladybird developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/InterpreterStack.h>
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#include <sys/mman.h>
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namespace JS {
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InterpreterStack::InterpreterStack()
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{
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m_base = mmap(nullptr, stack_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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VERIFY(m_base != MAP_FAILED);
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m_top = m_base;
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m_limit = static_cast<u8*>(m_base) + stack_size;
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}
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InterpreterStack::~InterpreterStack()
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{
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munmap(m_base, stack_size);
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}
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}
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