73f347b75c
This is currently only used in the bytecode dump to annotate to where unwinds lead per block, but will be hooked up to the virtual machine in the next commit.
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Badge.h>
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#include <AK/DeprecatedString.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Heap/Handle.h>
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namespace JS::Bytecode {
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struct UnwindInfo {
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Executable const* executable;
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BasicBlock const* handler;
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BasicBlock const* finalizer;
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JS::GCPtr<Environment> lexical_environment;
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bool handler_called { false };
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};
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class BasicBlock {
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AK_MAKE_NONCOPYABLE(BasicBlock);
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public:
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static NonnullOwnPtr<BasicBlock> create(DeprecatedString name);
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~BasicBlock();
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void dump(Executable const&) const;
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ReadonlyBytes instruction_stream() const { return m_buffer.span(); }
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u8* data() { return m_buffer.data(); }
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u8 const* data() const { return m_buffer.data(); }
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size_t size() const { return m_buffer.size(); }
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void grow(size_t additional_size);
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void terminate(Badge<Generator>) { m_terminated = true; }
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bool is_terminated() const { return m_terminated; }
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DeprecatedString const& name() const { return m_name; }
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void set_handler(BasicBlock const& handler) { m_handler = &handler; }
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void set_finalizer(BasicBlock const& finalizer) { m_finalizer = &finalizer; }
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BasicBlock const* handler() const { return m_handler; }
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BasicBlock const* finalizer() const { return m_finalizer; }
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private:
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explicit BasicBlock(DeprecatedString name);
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Vector<u8> m_buffer;
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BasicBlock const* m_handler { nullptr };
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BasicBlock const* m_finalizer { nullptr };
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DeprecatedString m_name;
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bool m_terminated { false };
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};
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}
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