cfe53c0666
We use binaryen's linker to produce a wasm file (via s2wasm). The wasm writer has capabilities to export source maps. The produced source map contains references to the original file, that might require additional source map file processing to include / package original files with it.
160 lines
4.2 KiB
C++
160 lines
4.2 KiB
C++
// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// This is a small C API inserted on top of the Binaryen C++ API which we use
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// from Rust. Once we have a real linker for we'll be able to remove all this,
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// and otherwise this is just all on a "as we need it" basis for now.
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#include <stdint.h>
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#include <string>
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#include <sstream>
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#include <stdlib.h>
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#include "s2wasm.h"
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#include "wasm-binary.h"
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#include "wasm-linker.h"
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using namespace wasm;
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struct BinaryenRustModule {
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BufferWithRandomAccess buffer;
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std::string sourceMapJSON;
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};
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struct BinaryenRustModuleOptions {
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uint64_t globalBase;
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bool debug;
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uint64_t stackAllocation;
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uint64_t initialMem;
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uint64_t maxMem;
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bool importMemory;
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bool ignoreUnknownSymbols;
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bool debugInfo;
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std::string startFunction;
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std::string sourceMapUrl;
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BinaryenRustModuleOptions() :
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globalBase(0),
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debug(false),
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stackAllocation(0),
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initialMem(0),
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maxMem(0),
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importMemory(false),
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ignoreUnknownSymbols(false),
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debugInfo(false),
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startFunction(""),
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sourceMapUrl("")
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{}
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};
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extern "C" BinaryenRustModuleOptions*
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BinaryenRustModuleOptionsCreate() {
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return new BinaryenRustModuleOptions;
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}
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extern "C" void
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BinaryenRustModuleOptionsFree(BinaryenRustModuleOptions *options) {
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delete options;
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}
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extern "C" void
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BinaryenRustModuleOptionsSetDebugInfo(BinaryenRustModuleOptions *options,
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bool debugInfo) {
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options->debugInfo = debugInfo;
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}
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extern "C" void
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BinaryenRustModuleOptionsSetStart(BinaryenRustModuleOptions *options,
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char *start) {
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options->startFunction = start;
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}
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extern "C" void
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BinaryenRustModuleOptionsSetSourceMapUrl(BinaryenRustModuleOptions *options,
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char *sourceMapUrl) {
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options->sourceMapUrl = sourceMapUrl;
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}
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extern "C" void
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BinaryenRustModuleOptionsSetStackAllocation(BinaryenRustModuleOptions *options,
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uint64_t stack) {
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options->stackAllocation = stack;
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}
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extern "C" void
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BinaryenRustModuleOptionsSetImportMemory(BinaryenRustModuleOptions *options,
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bool import) {
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options->importMemory = import;
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}
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extern "C" BinaryenRustModule*
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BinaryenRustModuleCreate(const BinaryenRustModuleOptions *options,
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const char *assembly) {
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Linker linker(
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options->globalBase,
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options->stackAllocation,
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options->initialMem,
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options->maxMem,
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options->importMemory,
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options->ignoreUnknownSymbols,
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options->startFunction,
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options->debug);
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S2WasmBuilder mainbuilder(assembly, options->debug);
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linker.linkObject(mainbuilder);
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linker.layout();
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auto ret = make_unique<BinaryenRustModule>();
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{
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WasmBinaryWriter writer(&linker.getOutput().wasm, ret->buffer, options->debug);
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writer.setNamesSection(options->debugInfo);
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std::unique_ptr<std::ostringstream> sourceMapStream = nullptr;
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{
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sourceMapStream = make_unique<std::ostringstream>();
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writer.setSourceMap(sourceMapStream.get(), options->sourceMapUrl);
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}
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// FIXME: support symbol maps?
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// writer.setSymbolMap(symbolMap);
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writer.write();
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if (sourceMapStream) {
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ret->sourceMapJSON = sourceMapStream->str();
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}
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}
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return ret.release();
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}
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extern "C" const uint8_t*
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BinaryenRustModulePtr(const BinaryenRustModule *M) {
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return M->buffer.data();
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}
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extern "C" size_t
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BinaryenRustModuleLen(const BinaryenRustModule *M) {
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return M->buffer.size();
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}
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extern "C" const char*
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BinaryenRustModuleSourceMapPtr(const BinaryenRustModule *M) {
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return M->sourceMapJSON.data();
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}
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extern "C" size_t
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BinaryenRustModuleSourceMapLen(const BinaryenRustModule *M) {
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return M->sourceMapJSON.length();
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}
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extern "C" void
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BinaryenRustModuleFree(BinaryenRustModule *M) {
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delete M;
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}
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