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https://github.com/LadybirdBrowser/ladybird.git
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6a3b71397b
The runtime unwind context stack was pushed by EnterUnwindContext and popped by LeaveUnwindContext. With both opcodes removed, it is no longer read or written by anything. Remove UnwindInfo, the unwind_contexts vector, its GC visit loop, its copy in ExecutionContext::copy(), and the VERIFY assertions that referenced it in handle_exception() and catch_exception().
75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <andreas@ladybird.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/String.h>
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#include <LibJS/Bytecode/Executable.h>
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#include <LibJS/Bytecode/ScopedOperand.h>
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#include <LibJS/Forward.h>
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namespace JS::Bytecode {
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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(u32 index, String name);
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~BasicBlock();
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u32 index() const { return m_index; }
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ReadonlyBytes instruction_stream() const LIFETIME_BOUND { 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 rewind()
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{
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m_buffer.resize_and_keep_capacity(m_last_instruction_start_offset);
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m_terminated = false;
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}
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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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String 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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auto const& source_map() const { return m_source_map; }
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void add_source_map_entry(u32 bytecode_offset, SourceRecord const& source_record) { m_source_map.append({ bytecode_offset, source_record }); }
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[[nodiscard]] bool has_resolved_this() const { return m_has_resolved_this; }
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void set_has_resolved_this() { m_has_resolved_this = true; }
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[[nodiscard]] size_t last_instruction_start_offset() const { return m_last_instruction_start_offset; }
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void set_last_instruction_start_offset(size_t offset) { m_last_instruction_start_offset = offset; }
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private:
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explicit BasicBlock(u32 index, String name);
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u32 m_index { 0 };
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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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String m_name;
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bool m_terminated { false };
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bool m_has_resolved_this { false };
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Vector<SourceMapEntry> m_source_map;
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size_t m_last_instruction_start_offset { 0 };
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};
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}
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