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f57c8889d5
For the _WIN32 macro, it is the definedness that matters rather than the value. Most uses of the macro already rely on the definedness. This commit fixes the few remaining uses that relied on the value. Differential Revision: https://reviews.llvm.org/D51105 llvm-svn: 340520
126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
//===- lib/Support/CodeGenCoverage.cpp -------------------------------------==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This file implements the CodeGenCoverage class.
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/CodeGenCoverage.h"
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#include "llvm/Config/llvm-config.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Mutex.h"
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#include "llvm/Support/ScopedPrinter.h"
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#include "llvm/Support/ToolOutputFile.h"
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#if LLVM_ON_UNIX
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#include <unistd.h>
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#elif defined(_WIN32)
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#include <windows.h>
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#endif
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using namespace llvm;
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static sys::SmartMutex<true> OutputMutex;
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CodeGenCoverage::CodeGenCoverage() {}
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void CodeGenCoverage::setCovered(uint64_t RuleID) {
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if (RuleCoverage.size() <= RuleID)
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RuleCoverage.resize(RuleID + 1, 0);
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RuleCoverage[RuleID] = true;
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}
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bool CodeGenCoverage::isCovered(uint64_t RuleID) const {
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if (RuleCoverage.size() <= RuleID)
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return false;
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return RuleCoverage[RuleID];
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}
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iterator_range<CodeGenCoverage::const_covered_iterator>
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CodeGenCoverage::covered() const {
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return RuleCoverage.set_bits();
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}
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bool CodeGenCoverage::parse(MemoryBuffer &Buffer, StringRef BackendName) {
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const char *CurPtr = Buffer.getBufferStart();
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while (CurPtr != Buffer.getBufferEnd()) {
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// Read the backend name from the input.
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const char *LexedBackendName = CurPtr;
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while (*CurPtr++ != 0)
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;
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if (CurPtr == Buffer.getBufferEnd())
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return false; // Data is invalid, expected rule id's to follow.
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bool IsForThisBackend = BackendName.equals(LexedBackendName);
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while (CurPtr != Buffer.getBufferEnd()) {
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if (std::distance(CurPtr, Buffer.getBufferEnd()) < 8)
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return false; // Data is invalid. Not enough bytes for another rule id.
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uint64_t RuleID = support::endian::read64(CurPtr, support::native);
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CurPtr += 8;
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// ~0ull terminates the rule id list.
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if (RuleID == ~0ull)
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break;
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// Anything else, is recorded or ignored depending on whether it's
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// intended for the backend we're interested in.
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if (IsForThisBackend)
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setCovered(RuleID);
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}
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}
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return true;
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}
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bool CodeGenCoverage::emit(StringRef CoveragePrefix,
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StringRef BackendName) const {
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if (!CoveragePrefix.empty() && !RuleCoverage.empty()) {
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sys::SmartScopedLock<true> Lock(OutputMutex);
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// We can handle locking within a process easily enough but we don't want to
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// manage it between multiple processes. Use the process ID to ensure no
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// more than one process is ever writing to the same file at the same time.
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std::string Pid =
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#if LLVM_ON_UNIX
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llvm::to_string(::getpid());
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#elif defined(_WIN32)
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llvm::to_string(::GetCurrentProcessId());
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#else
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"";
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#endif
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std::string CoverageFilename = (CoveragePrefix + Pid).str();
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std::error_code EC;
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sys::fs::OpenFlags OpenFlags = sys::fs::F_Append;
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std::unique_ptr<ToolOutputFile> CoverageFile =
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llvm::make_unique<ToolOutputFile>(CoverageFilename, EC, OpenFlags);
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if (EC)
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return false;
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uint64_t Zero = 0;
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uint64_t InvZero = ~0ull;
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CoverageFile->os() << BackendName;
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CoverageFile->os().write((const char *)&Zero, sizeof(unsigned char));
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for (uint64_t I : RuleCoverage.set_bits())
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CoverageFile->os().write((const char *)&I, sizeof(uint64_t));
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CoverageFile->os().write((const char *)&InvZero, sizeof(uint64_t));
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CoverageFile->keep();
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}
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return true;
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}
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void CodeGenCoverage::reset() { RuleCoverage.resize(0); }
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