1d891d44f3
We recently decided to change 'event' to 'tag', and 'event section' to 'tag section', out of the rationale that the section contains a generalized tag that references a type, which may be used for something other than exceptions, and the name 'event' can be confusing in the web context. See - https://github.com/WebAssembly/exception-handling/issues/159#issuecomment-857910130 - https://github.com/WebAssembly/exception-handling/pull/161 Reviewed By: tlively Differential Revision: https://reviews.llvm.org/D104423
108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
//===- InputElement.h ----------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_WASM_INPUT_ELEMENT_H
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#define LLD_WASM_INPUT_ELEMENT_H
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#include "Config.h"
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#include "InputFiles.h"
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#include "WriterUtils.h"
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#include "lld/Common/LLVM.h"
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#include "llvm/Object/Wasm.h"
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namespace lld {
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namespace wasm {
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// Represents a single element (Global, Tag, Table, etc) within an input
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// file.
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class InputElement {
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protected:
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InputElement(StringRef name, ObjFile *f)
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: file(f), live(!config->gcSections), name(name) {}
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public:
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StringRef getName() const { return name; }
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uint32_t getAssignedIndex() const { return assignedIndex.getValue(); }
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bool hasAssignedIndex() const { return assignedIndex.hasValue(); }
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void assignIndex(uint32_t index) {
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assert(!hasAssignedIndex());
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assignedIndex = index;
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}
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ObjFile *file;
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bool live = false;
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protected:
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StringRef name;
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llvm::Optional<uint32_t> assignedIndex;
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};
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inline WasmInitExpr intConst(uint64_t value, bool is64) {
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WasmInitExpr ie;
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if (is64) {
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ie.Opcode = llvm::wasm::WASM_OPCODE_I64_CONST;
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ie.Value.Int64 = static_cast<int64_t>(value);
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} else {
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ie.Opcode = llvm::wasm::WASM_OPCODE_I32_CONST;
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ie.Value.Int32 = static_cast<int32_t>(value);
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}
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return ie;
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}
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class InputGlobal : public InputElement {
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public:
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InputGlobal(const WasmGlobal &g, ObjFile *f)
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: InputElement(g.SymbolName, f), type(g.Type), initExpr(g.InitExpr) {}
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const WasmGlobalType &getType() const { return type; }
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const WasmInitExpr &getInitExpr() const { return initExpr; }
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void setPointerValue(uint64_t value) {
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initExpr = intConst(value, config->is64.getValueOr(false));
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}
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private:
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WasmGlobalType type;
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WasmInitExpr initExpr;
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};
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class InputTag : public InputElement {
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public:
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InputTag(const WasmSignature &s, const WasmTag &t, ObjFile *f)
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: InputElement(t.SymbolName, f), signature(s), type(t.Type) {}
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const WasmTagType &getType() const { return type; }
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const WasmSignature &signature;
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private:
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WasmTagType type;
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};
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class InputTable : public InputElement {
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public:
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InputTable(const WasmTable &t, ObjFile *f)
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: InputElement(t.SymbolName, f), type(t.Type) {}
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const WasmTableType &getType() const { return type; }
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void setLimits(const WasmLimits &limits) { type.Limits = limits; }
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private:
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WasmTableType type;
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};
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} // namespace wasm
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inline std::string toString(const wasm::InputElement *d) {
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return (toString(d->file) + ":(" + d->getName() + ")").str();
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}
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} // namespace lld
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#endif // LLD_WASM_INPUT_ELEMENT_H
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