Jake Ehrlich
87b0dbab2d
This change adds enough functionality to compile hello world from S-expressions in a contrived way. It fails to handle this input realistically in several ways. 1) It assumes the existence of dart:core::print 2) It handles all dart values as C strings 3) It assumes only very static calls can be made with no named arguments 4) If a stack overflow is detected it just traps. 5) I'm not sure how the current dart runtime works but the contrived runtime used here puts a contrived thread object in `gs`. This change adds a basic framework for implementing new instructions that should make it possible to implement new instructions with much smaller changes however. Change-Id: Ic167a29908a875bfc234c4e9bf5f4ac2ff52a3a2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/117222 Commit-Queue: Jake Ehrlich <jakehehrlich@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include <stdio.h>
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#include <map>
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#include <regex>
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/LineIterator.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/Regex.h"
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#include "llvm/Support/WithColor.h"
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namespace {
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using namespace llvm;
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struct Config {
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StringRef filename;
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StringRef out_dir;
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};
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StringMap<std::string> GetSubstitutions(const Config& config) {
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// Compute all of our strings needed for substitutions.
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StringRef test_dir = sys::path::parent_path(config.filename);
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StringRef basename = sys::path::filename(config.filename);
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SmallString<128> tmp_file;
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sys::path::append(tmp_file, sys::path::Style::native, config.out_dir,
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basename + ".tmp");
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SmallString<128> codegen;
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sys::path::append(codegen, sys::path::Style::native, BIT_BINARY_DIR,
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"codegen");
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SmallString<128> bit;
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sys::path::append(bit, sys::path::Style::native, BIT_BINARY_DIR, "bit");
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SmallString<128> clang;
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sys::path::append(clang, sys::path::Style::native, BIT_CLANG_DIR, "clang");
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// Set up our substitutions.
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StringMap<std::string> subs;
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subs["s"] = config.filename.str();
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subs["p"] = test_dir.str();
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subs["P"] = test_dir.str();
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subs["t"] = tmp_file.str().str();
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subs["{codegen}"] = codegen.str().str();
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subs["{bit}"] = bit.str().str();
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subs["{clang}"] = clang.str().str();
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return subs;
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}
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std::string PerformSubstitutions(const StringMap<std::string>& subs,
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StringRef string) {
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std::string out = string.str();
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for (const auto& sub : subs) {
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std::string key = (Twine("%") + sub.getKeyData()).str();
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size_t pos = 0;
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while ((pos = out.find(key, pos)) != std::string::npos) {
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if (pos != 0 && out[pos - 1] == '%') {
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pos += key.size();
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continue;
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}
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out.replace(pos, key.size(), sub.getValue());
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pos += sub.second.size();
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}
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}
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return out;
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}
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Optional<std::string> GetCommand(StringRef line) {
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static Regex run_line("^;[ ]*RUN:[ ]*(.*)$");
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SmallVector<StringRef, 2> cmd;
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if (!run_line.match(line, &cmd)) return Optional<std::string>{};
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assert(cmd.size() == 2);
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return cmd[1].str();
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}
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} // namespace
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