e3f65f215d
If the exception from the `try` block has already been caught by `catch`, we need to clear the saved exception before entering `finally` so that ContinuePendingUnwind will not re-throw it. 9 new passes on test262 :^)
59 lines
1.6 KiB
C++
59 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, size_t size = 4 * KiB);
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~BasicBlock();
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void seal();
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void dump(Executable const&) const;
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ReadonlyBytes instruction_stream() const { return ReadonlyBytes { m_buffer, m_buffer_size }; }
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size_t size() const { return m_buffer_size; }
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void* next_slot() { return m_buffer + m_buffer_size; }
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bool can_grow(size_t additional_size) const { return m_buffer_size + additional_size <= m_buffer_capacity; }
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void grow(size_t additional_size);
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void terminate(Badge<Generator>, Instruction const* terminator) { m_terminator = terminator; }
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bool is_terminated() const { return m_terminator != nullptr; }
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Instruction const* terminator() const { return m_terminator; }
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DeprecatedString const& name() const { return m_name; }
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private:
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BasicBlock(DeprecatedString name, size_t size);
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u8* m_buffer { nullptr };
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Instruction const* m_terminator { nullptr };
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size_t m_buffer_capacity { 0 };
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size_t m_buffer_size { 0 };
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DeprecatedString m_name;
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};
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}
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