Make hardware-counter.cpp compile

`g++ -std=c++11 -lpthread src/hardware-counter.cpp
src/thread-local.cpp src/test.cpp` works and runs where `src/test.cpp` is:

```

int main() {
  bool enable = true;
  std::string events = "";
  bool recordSubprocesses = false;
  HPHP::HardwareCounter::Init(enable, events, recordSubprocesses);

  HPHP::HardwareCounter::s_counter.getCheck();

  int64_t start = HPHP::HardwareCounter::GetInstructionCount();
  volatile int x;
  for (int i = 0; i < 1000000; i++) {
    x += i;
  }
  int64_t end = HPHP::HardwareCounter::GetInstructionCount();

  printf("%d\n", end - start);
}
```

scripts/perf-counters/src/hardware-counter.cpp

@@ -7,14 +7,10 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-#include "hphp/util/hardware-counter.h"
+#include "hardware-counter.h"
 
 #ifndef NO_HARDWARE_COUNTERS
 
-#include <folly/ScopeGuard.h>
-
-#include "hphp/util/logger.h"
-
 #define _GNU_SOURCE 1
 #include <stdio.h>
 #include <stdlib.h>
@@ -28,8 +24,6 @@
 #include <asm/unistd.h>
 #include <sys/prctl.h>
 #include <linux/perf_event.h>
-#include <folly/String.h>
-#include <folly/Memory.h>
 
 namespace HPHP {
 ///////////////////////////////////////////////////////////////////////////////
@@ -80,14 +74,14 @@ public:
     inited = true;
     m_fd = syscall(__NR_perf_event_open, &pe, 0, -1, -1, 0);
     if (m_fd < 0) {
-      Logger::Verbose("perf_event_open failed with: %s",
-                      folly::errnoStr(errno).c_str());
+      // Logger::Verbose("perf_event_open failed with: %s",
+      //                 folly::errnoStr(errno).c_str());
       m_err = -1;
       return;
     }
     if (ioctl(m_fd, PERF_EVENT_IOC_ENABLE, 0) < 0) {
-      Logger::Warning("perf_event failed to enable: %s",
-                      folly::errnoStr(errno).c_str());
+      // Logger::Warning("perf_event failed to enable: %s",
+      //                 folly::errnoStr(errno).c_str());
       close();
       m_err = -1;
       return;
@@ -136,15 +130,15 @@ public:
     extra = 0;
     if (m_fd > 0) {
       if (ioctl (m_fd, PERF_EVENT_IOC_RESET, 0) < 0) {
-        Logger::Warning("perf_event failed to reset with: %s",
-                        folly::errnoStr(errno).c_str());
+        // Logger::Warning("perf_event failed to reset with: %s",
+        //                 folly::errnoStr(errno).c_str());
         m_err = -1;
         return;
       }
       auto ret = ::read(m_fd, reset_values, sizeof(reset_values));
       if (ret != sizeof(reset_values)) {
-        Logger::Warning("perf_event failed to reset with: %s",
-                        folly::errnoStr(errno).c_str());
+        // Logger::Warning("perf_event failed to reset with: %s",
+        //                 folly::errnoStr(errno).c_str());
         m_err = -1;
         return;
       }
@@ -358,7 +352,7 @@ bool HardwareCounter::addPerfEvent(const char* event) {
       found = true;
       type = perfTable[i].type;
     } else if (type != perfTable[i].type) {
-      Logger::Warning("failed to find perf event: %s", event);
+      // Logger::Warning("failed to find perf event: %s", event);
       return false;
     }
     config |= perfTable[i].config;
@@ -377,12 +371,13 @@ bool HardwareCounter::addPerfEvent(const char* event) {
   }
 
   if (!found || *ev) {
-    Logger::Warning("failed to find perf event: %s", event);
+    // Logger::Warning("failed to find perf event: %s", event);
     return false;
   }
-  auto hwc = folly::make_unique<HardwareCounterImpl>(type, config, event);
+  std::unique_ptr<HardwareCounterImpl> hwc(
+      new HardwareCounterImpl(type, config, event));
   if (hwc->m_err) {
-    Logger::Warning("failed to set perf event: %s", event);
+    // Logger::Warning("failed to set perf event: %s", event);
     return false;
   }
   m_counters.emplace_back(std::move(hwc));
@@ -407,25 +402,27 @@ bool HardwareCounter::eventExists(const char *event) {
   return false;
 }
 
-bool HardwareCounter::setPerfEvents(folly::StringPiece sevents) {
+bool HardwareCounter::setPerfEvents(std::string sevents) {
   // Make a copy of the string for use with strtok.
   auto const sevents_buf = static_cast<char*>(malloc(sevents.size() + 1));
-  SCOPE_EXIT { free(sevents_buf); };
   memcpy(sevents_buf, sevents.data(), sevents.size());
   sevents_buf[sevents.size()] = '\0';
 
   char* strtok_buf = nullptr;
   char* s = strtok_r(sevents_buf, ",", &strtok_buf);
+  bool success = true;
   while (s) {
     if (!eventExists(s) && !addPerfEvent(s)) {
-      return false;
+      success = false;
+      break;
     }
     s = strtok_r(nullptr, ",", &strtok_buf);
   }
-  return true;
+  free(sevents_buf);
+  return success;
 }
 
-bool HardwareCounter::SetPerfEvents(folly::StringPiece events) {
+bool HardwareCounter::SetPerfEvents(std::string events) {
   return s_counter->setPerfEvents(events);
 }
 

scripts/perf-counters/src/hardware-counter.h

@@ -10,11 +10,10 @@
 #ifndef incl_HPHP_UTIL_HARDWARE_COUNTER_H_
 #define incl_HPHP_UTIL_HARDWARE_COUNTER_H_
 
-#include "hphp/util/thread-local.h"
-
-#include <folly/Range.h>
+#include "thread-local.h"
 
 #include <cstdint>
+#include <memory>
 #include <vector>
 
 namespace HPHP {
@@ -43,7 +42,7 @@ public:
   static int64_t GetInstructionCount();
   static int64_t GetLoadCount();
   static int64_t GetStoreCount();
-  static bool SetPerfEvents(folly::StringPiece events);
+  static bool SetPerfEvents(std::string events);
   static void IncInstructionCount(int64_t amount);
   static void IncLoadCount(int64_t amount);
   static void IncStoreCount(int64_t amount);
@@ -61,7 +60,7 @@ private:
   int64_t getStoreCount();
   bool eventExists(const char* event);
   bool addPerfEvent(const char* event);
-  bool setPerfEvents(folly::StringPiece events);
+  bool setPerfEvents(std::string events);
   void getPerfEvents(PerfEventCallback f, void* data);
   void clearPerfEvents();
 

scripts/perf-counters/src/portability.h

@@ -10,9 +10,14 @@
 #ifndef incl_HPHP_PORTABILITY_H_
 #define incl_HPHP_PORTABILITY_H_
 
-#include <folly/Likely.h> // defining LIKELY/UNLIKELY is part of this header
-#include <folly/Portability.h>
-#include <folly/CPortability.h> // defining FOLLY_DISABLE_ADDRESS_SANITIZER
+// From folly/Likely.h
+#if defined(__GNUC__) && __GNUC__ >= 4
+#define LIKELY(x)   (__builtin_expect((x), 1))
+#define UNLIKELY(x) (__builtin_expect((x), 0))
+#else
+#define LIKELY(x)   (x)
+#define UNLIKELY(x) (x)
+#endif
 
 //////////////////////////////////////////////////////////////////////
 

scripts/perf-counters/src/thread-local.cpp

@@ -7,7 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-#include "hphp/util/thread-local.h"
+#include "thread-local.h"
 
 #ifdef __linux__
 #include <link.h>

scripts/perf-counters/src/thread-local.h

@@ -10,11 +10,16 @@
 #ifndef incl_HPHP_THREAD_LOCAL_H_
 #define incl_HPHP_THREAD_LOCAL_H_
 
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
 #include <pthread.h>
-#include "hphp/util/exception.h"
 #include <errno.h>
-#include <folly/String.h>
+#include <stdexcept>
 #include <type_traits>
+#include <utility>
+#include "portability.h"
 
 namespace HPHP {
 
@@ -85,8 +90,7 @@ inline void ThreadLocalCheckReturn(int ret, const char *funcName) {
   if (ret != 0) {
     // This is used from global constructors so the safest thing to do is just
     // print to stderr and exit().
-    fprintf(stderr, "%s returned %d: %s", funcName, ret,
-            folly::errnoStr(ret).c_str());
+    fprintf(stderr, "%s returned %d", funcName, ret);
     exit(1);
   }
 }
@@ -357,7 +361,7 @@ template<typename T, bool throwOnNull = true>
 struct ThreadLocalProxy {
   T *get() const {
     if (m_p == nullptr && throwOnNull) {
-      throw Exception("ThreadLocalProxy::get() called before set()");
+      throw std::runtime_error("ThreadLocalProxy::get() called before set()");
     }
     return m_p;
   }
@@ -708,7 +712,7 @@ public:
   T *get() const {
     T *obj = (T*)pthread_getspecific(m_key);
     if (obj == nullptr && throwOnNull) {
-      throw Exception("ThreadLocalProxy::get() called before set()");
+      throw std::runtime_error("ThreadLocalProxy::get() called before set()");
     }
     return obj;
   }