mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 02:52:53 +02:00
ae65e281f3
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
125 lines
3.8 KiB
C++
125 lines
3.8 KiB
C++
//===- lib/Support/CodeGenCoverage.cpp -------------------------------------==//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
/// \file
|
|
/// This file implements the CodeGenCoverage class.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/CodeGenCoverage.h"
|
|
|
|
#include "llvm/Config/llvm-config.h"
|
|
#include "llvm/Support/Endian.h"
|
|
#include "llvm/Support/FileSystem.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/Mutex.h"
|
|
#include "llvm/Support/ScopedPrinter.h"
|
|
#include "llvm/Support/ToolOutputFile.h"
|
|
|
|
#if LLVM_ON_UNIX
|
|
#include <unistd.h>
|
|
#elif defined(_WIN32)
|
|
#include <windows.h>
|
|
#endif
|
|
|
|
using namespace llvm;
|
|
|
|
static sys::SmartMutex<true> OutputMutex;
|
|
|
|
CodeGenCoverage::CodeGenCoverage() {}
|
|
|
|
void CodeGenCoverage::setCovered(uint64_t RuleID) {
|
|
if (RuleCoverage.size() <= RuleID)
|
|
RuleCoverage.resize(RuleID + 1, 0);
|
|
RuleCoverage[RuleID] = true;
|
|
}
|
|
|
|
bool CodeGenCoverage::isCovered(uint64_t RuleID) const {
|
|
if (RuleCoverage.size() <= RuleID)
|
|
return false;
|
|
return RuleCoverage[RuleID];
|
|
}
|
|
|
|
iterator_range<CodeGenCoverage::const_covered_iterator>
|
|
CodeGenCoverage::covered() const {
|
|
return RuleCoverage.set_bits();
|
|
}
|
|
|
|
bool CodeGenCoverage::parse(MemoryBuffer &Buffer, StringRef BackendName) {
|
|
const char *CurPtr = Buffer.getBufferStart();
|
|
|
|
while (CurPtr != Buffer.getBufferEnd()) {
|
|
// Read the backend name from the input.
|
|
const char *LexedBackendName = CurPtr;
|
|
while (*CurPtr++ != 0)
|
|
;
|
|
if (CurPtr == Buffer.getBufferEnd())
|
|
return false; // Data is invalid, expected rule id's to follow.
|
|
|
|
bool IsForThisBackend = BackendName.equals(LexedBackendName);
|
|
while (CurPtr != Buffer.getBufferEnd()) {
|
|
if (std::distance(CurPtr, Buffer.getBufferEnd()) < 8)
|
|
return false; // Data is invalid. Not enough bytes for another rule id.
|
|
|
|
uint64_t RuleID = support::endian::read64(CurPtr, support::native);
|
|
CurPtr += 8;
|
|
|
|
// ~0ull terminates the rule id list.
|
|
if (RuleID == ~0ull)
|
|
break;
|
|
|
|
// Anything else, is recorded or ignored depending on whether it's
|
|
// intended for the backend we're interested in.
|
|
if (IsForThisBackend)
|
|
setCovered(RuleID);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CodeGenCoverage::emit(StringRef CoveragePrefix,
|
|
StringRef BackendName) const {
|
|
if (!CoveragePrefix.empty() && !RuleCoverage.empty()) {
|
|
sys::SmartScopedLock<true> Lock(OutputMutex);
|
|
|
|
// We can handle locking within a process easily enough but we don't want to
|
|
// manage it between multiple processes. Use the process ID to ensure no
|
|
// more than one process is ever writing to the same file at the same time.
|
|
std::string Pid =
|
|
#if LLVM_ON_UNIX
|
|
llvm::to_string(::getpid());
|
|
#elif defined(_WIN32)
|
|
llvm::to_string(::GetCurrentProcessId());
|
|
#else
|
|
"";
|
|
#endif
|
|
|
|
std::string CoverageFilename = (CoveragePrefix + Pid).str();
|
|
|
|
std::error_code EC;
|
|
sys::fs::OpenFlags OpenFlags = sys::fs::F_Append;
|
|
std::unique_ptr<ToolOutputFile> CoverageFile =
|
|
llvm::make_unique<ToolOutputFile>(CoverageFilename, EC, OpenFlags);
|
|
if (EC)
|
|
return false;
|
|
|
|
uint64_t Zero = 0;
|
|
uint64_t InvZero = ~0ull;
|
|
CoverageFile->os() << BackendName;
|
|
CoverageFile->os().write((const char *)&Zero, sizeof(unsigned char));
|
|
for (uint64_t I : RuleCoverage.set_bits())
|
|
CoverageFile->os().write((const char *)&I, sizeof(uint64_t));
|
|
CoverageFile->os().write((const char *)&InvZero, sizeof(uint64_t));
|
|
|
|
CoverageFile->keep();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void CodeGenCoverage::reset() { RuleCoverage.resize(0); }
|