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9a3573bed1
When using a file list inputs to the swift-frontend invocation, the name of the file is not significant, only the content of the file. Improve cache key computation so only the content of the input file will affect cache key, not the file name.
109 lines
3.7 KiB
C++
109 lines
3.7 KiB
C++
//===--- CompileJobCacheKey.cpp - compile cache key methods ---------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains utility methods for creating compile job cache keys.
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//
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//===----------------------------------------------------------------------===//
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#include <swift/Frontend/CompileJobCacheKey.h>
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#include <swift/Basic/Version.h>
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#include <llvm/ADT/SmallString.h>
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/CAS/HierarchicalTreeBuilder.h"
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#include "llvm/CAS/ObjectStore.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/MemoryBuffer.h"
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using namespace swift;
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// TODO: Rewrite this into CASNodeSchema.
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llvm::Expected<llvm::cas::ObjectRef> swift::createCompileJobBaseCacheKey(
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llvm::cas::ObjectStore &CAS, ArrayRef<const char *> Args) {
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SmallString<256> CommandLine;
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// TODO: Improve this list.
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static const std::vector<std::string> removeArgAndNext = {
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"-o",
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"-output-filelist",
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"-supplementary-output-file-map",
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"-index-unit-output-path",
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"-index-unit-output-path-filelist",
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"-serialize-diagnostics-path",
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"-num-threads",
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"-cas-path"};
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// Don't count the `-frontend` in the first location since only frontend
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// invocation can have a cache key.
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if (Args.size() > 1 && StringRef(Args.front()) == "-frontend")
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Args = Args.drop_front();
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for (unsigned I = 0, IE =Args.size(); I < IE; ++I) {
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StringRef Arg = Args[I];
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if (llvm::is_contained(removeArgAndNext, Arg)) {
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++I;
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continue;
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}
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// FIXME: Use a heuristic to remove all the flags that affect output paths.
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// Those should not affect compile cache key.
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if (Arg.startswith("-emit-")) {
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if (Arg.endswith("-path"))
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++I;
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continue;
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}
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// Handle -file-list option. Need to drop the option but adds the file
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// content instead.
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// FIXME: will be nice if the same list of files gets the same key no matter
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// going through command-line or filelist.
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if (Arg == "-filelist" || Arg == "-primary-filelist") {
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auto FileList = llvm::MemoryBuffer::getFile(Args[++I]);
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if (!FileList)
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return llvm::errorCodeToError(FileList.getError());
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CommandLine.append(Arg);
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CommandLine.push_back(0);
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CommandLine.append((*FileList)->getBuffer());
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CommandLine.push_back(0);
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continue;
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}
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CommandLine.append(Arg);
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CommandLine.push_back(0);
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}
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llvm::cas::HierarchicalTreeBuilder Builder;
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auto CMD = CAS.storeFromString(None, CommandLine);
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if (!CMD)
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return CMD.takeError();
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Builder.push(*CMD, llvm::cas::TreeEntry::Regular, "command-line");
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// FIXME: The version is maybe insufficient...
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auto Version = CAS.storeFromString(None, version::getSwiftFullVersion());
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if (!Version)
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return Version.takeError();
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Builder.push(*Version, llvm::cas::TreeEntry::Regular, "version");
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if (auto Out = Builder.create(CAS))
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return Out->getRef();
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else
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return Out.takeError();
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}
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llvm::Expected<llvm::cas::ObjectRef> swift::createCompileJobCacheKeyForOutput(
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llvm::cas::ObjectStore &CAS, llvm::cas::ObjectRef BaseKey,
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StringRef ProducingInput, file_types::ID OutputType) {
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SmallString<256> OutputInfo;
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// Encode the OutputType as first byte, then append the input file path.
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OutputInfo.emplace_back((char)OutputType);
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OutputInfo.append(ProducingInput);
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return CAS.storeFromString({BaseKey}, OutputInfo);
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}
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