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110 lines
2.6 KiB
110 lines
2.6 KiB
// Copyright 2020 The SwiftShader Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// turbo-cov is a minimal re-implementation of LLVM's llvm-cov, that emits just
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// the per segment coverage in a binary stream. This avoids the overhead of
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// encoding to JSON.
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ProfileData/Coverage/CoverageMapping.h"
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#include "llvm/ProfileData/InstrProfReader.h"
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#include <cstdio>
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using namespace llvm;
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using namespace coverage;
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namespace {
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template<typename T>
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void emit(T v)
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{
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fwrite(&v, sizeof(v), 1, stdout);
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}
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void emit(const llvm::StringRef &str)
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{
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uint64_t len = str.size();
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emit<uint32_t>(len);
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fwrite(str.data(), len, 1, stdout);
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}
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} // namespace
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int main(int argc, const char **argv)
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{
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if(argc < 3)
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{
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fprintf(stderr, "turbo-cov <exe> <profdata>\n");
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return 1;
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}
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auto exe = argv[1];
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auto profdata = argv[2];
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auto res = CoverageMapping::load({ exe }, profdata);
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if(Error E = res.takeError())
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{
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fprintf(stderr, "Failed to load executable '%s': %s\n", exe, toString(std::move(E)).c_str());
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return 1;
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}
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auto coverage = std::move(res.get());
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if(!coverage)
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{
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fprintf(stderr, "Could not load coverage information\n");
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return 1;
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}
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if(auto mismatched = coverage->getMismatchedCount())
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{
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fprintf(stderr, "%d functions have mismatched data\n", (int)mismatched);
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return 1;
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}
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// uint32 num_files
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// file[0]
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// uint32 filename.length
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// <data> filename.data
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// uint32 num_segments
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// file[0].segment[0]
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// uint32 line
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// uint32 col
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// uint32 count
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// uint8 hasCount
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// file[0].segment[1]
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// ...
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// file[2]
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// ...
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auto files = coverage->getUniqueSourceFiles();
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emit<uint32_t>(files.size());
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for(auto &file : files)
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{
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emit(file);
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auto fileCoverage = coverage->getCoverageForFile(file);
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emit<uint32_t>(fileCoverage.end() - fileCoverage.begin());
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for(auto &segment : fileCoverage)
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{
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emit<uint32_t>(segment.Line);
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emit<uint32_t>(segment.Col);
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emit<uint32_t>(segment.Count);
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emit<uint8_t>(segment.HasCount ? 1 : 0);
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}
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}
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return 0;
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}
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