blob: eeb1e8a70358bb19477575862d3f0aaf4604a465 [file] [log] [blame]
// Copyright 2022 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// turbo-cov is a minimal re-implementation of LLVM's llvm-cov, that emits just
// the per segment coverage in a binary stream. This avoids the overhead of
// encoding to JSON.
#include <cstdio>
#include <utility>
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ProfileData/Coverage/CoverageMapping.h"
#include "llvm/ProfileData/InstrProfReader.h"
#if defined(_MSC_VER)
#include <fcntl.h> // _O_BINARY
#include <io.h> // _setmode
#endif
namespace {
template <typename T>
void emit(T v) {
fwrite(&v, sizeof(v), 1, stdout);
}
void emit(const llvm::StringRef& str) {
uint64_t len = str.size();
emit<uint32_t>(len);
fwrite(str.data(), len, 1, stdout);
}
} // namespace
int main(int argc, const char** argv) {
#if defined(_MSC_VER)
// Change stdin & stdout from text mode to binary mode.
// This ensures sequences of \r\n are not changed to \n.
_setmode(_fileno(stdin), _O_BINARY);
_setmode(_fileno(stdout), _O_BINARY);
#endif
if (argc < 3) {
fprintf(stderr, "turbo-cov <exe> <profdata>\n");
return 1;
}
auto exe = argv[1];
auto profdata = argv[2];
auto res = llvm::coverage::CoverageMapping::load({exe}, profdata);
if (auto E = res.takeError()) {
fprintf(stderr, "failed to load executable '%s': %s\n", exe,
llvm::toString(std::move(E)).c_str());
return 1;
}
auto coverage = std::move(res.get());
if (!coverage) {
fprintf(stderr, "failed to load coverage information\n");
return 1;
}
if (auto mismatched = coverage->getMismatchedCount()) {
fprintf(stderr, "%d functions have mismatched data\n", static_cast<int>(mismatched));
return 1;
}
// uint32 num_files
// file[0]
// uint32 filename.length
// <data> filename.data
// uint32 num_segments
// file[0].segment[0]
// uint32 line
// uint32 col
// uint32 count
// uint8 hasCount
// file[0].segment[1]
// ...
// file[1]
// ...
auto files = coverage->getUniqueSourceFiles();
emit<uint32_t>(files.size());
for (auto& file : files) {
emit(file);
auto fileCoverage = coverage->getCoverageForFile(file);
emit<uint32_t>(fileCoverage.end() - fileCoverage.begin());
for (auto& segment : fileCoverage) {
emit<uint32_t>(segment.Line);
emit<uint32_t>(segment.Col);
emit<uint32_t>(segment.Count);
emit<uint8_t>(segment.HasCount ? 1 : 0);
}
}
return 0;
}