#include "llvm/ADT/Statistic.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Mutex.h"
#include "llvm/ADT/StringExtras.h"
#include <algorithm>
#include <cstring>
using namespace llvm;
namespace llvm { extern raw_ostream *CreateInfoOutputFile(); }
static cl::opt<bool>
Enabled("stats", cl::desc("Enable statistics output from program"));
namespace {
class StatisticInfo {
std::vector<const Statistic*> Stats;
friend void llvm::PrintStatistics();
friend void llvm::PrintStatistics(raw_ostream &OS);
public:
~StatisticInfo();
void addStatistic(const Statistic *S) {
Stats.push_back(S);
}
};
}
static ManagedStatic<StatisticInfo> StatInfo;
static ManagedStatic<sys::SmartMutex<true> > StatLock;
void Statistic::RegisterStatistic() {
sys::SmartScopedLock<true> Writer(*StatLock);
if (!Initialized) {
if (Enabled)
StatInfo->addStatistic(this);
TsanHappensBefore(this);
sys::MemoryFence();
TsanIgnoreWritesBegin();
Initialized = true;
TsanIgnoreWritesEnd();
}
}
namespace {
struct NameCompare {
bool operator()(const Statistic *LHS, const Statistic *RHS) const {
int Cmp = std::strcmp(LHS->getName(), RHS->getName());
if (Cmp != 0) return Cmp < 0;
return std::strcmp(LHS->getDesc(), RHS->getDesc()) < 0;
}
};
}
StatisticInfo::~StatisticInfo() {
llvm::PrintStatistics();
}
void llvm::EnableStatistics() {
Enabled.setValue(true);
}
bool llvm::AreStatisticsEnabled() {
return Enabled;
}
void llvm::PrintStatistics(raw_ostream &OS) {
StatisticInfo &Stats = *StatInfo;
unsigned MaxNameLen = 0, MaxValLen = 0;
for (size_t i = 0, e = Stats.Stats.size(); i != e; ++i) {
MaxValLen = std::max(MaxValLen,
(unsigned)utostr(Stats.Stats[i]->getValue()).size());
MaxNameLen = std::max(MaxNameLen,
(unsigned)std::strlen(Stats.Stats[i]->getName()));
}
std::stable_sort(Stats.Stats.begin(), Stats.Stats.end(), NameCompare());
OS << "===" << std::string(73, '-') << "===\n"
<< " ... Statistics Collected ...\n"
<< "===" << std::string(73, '-') << "===\n\n";
for (size_t i = 0, e = Stats.Stats.size(); i != e; ++i)
OS << format("%*u %-*s - %s\n",
MaxValLen, Stats.Stats[i]->getValue(),
MaxNameLen, Stats.Stats[i]->getName(),
Stats.Stats[i]->getDesc());
OS << '\n'; OS.flush();
}
void llvm::PrintStatistics() {
StatisticInfo &Stats = *StatInfo;
if (Stats.Stats.empty()) return;
raw_ostream &OutStream = *CreateInfoOutputFile();
PrintStatistics(OutStream);
delete &OutStream; }