Update the tcmalloc vendor branch to r144 (gperftools 2.0).

third_party/tcmalloc/vendor/src/thread_cache.cc

 // Copyright (c) 2008, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
 // 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.
 
 // ---
 // Author: Ken Ashcraft <opensource@google.com>
 
 #include <config.h>
 #include "thread_cache.h"
+#include <errno.h>
 #include <string.h>                     // for memcpy
 #include <algorithm>                    // for max, min
 #include "base/commandlineflags.h"      // for SpinLockHolder
 #include "base/spinlock.h"              // for SpinLockHolder
 #include "central_freelist.h"           // for CentralFreeListPadded
 #include "maybe_threads.h"
 
 using std::min;
 using std::max;
 
@@ skipping 33 matching lines @@
       kernel_supports_tls = true;
     }
 # elif !HAVE_DECL_UNAME    // if too old for uname, probably too old for TLS
     void CheckIfKernelSupportsTLS() {
       kernel_supports_tls = false;
     }
 # else
 #   include <sys/utsname.h>    // DECL_UNAME checked for <sys/utsname.h> too
     void CheckIfKernelSupportsTLS() {
       struct utsname buf;
-      if (uname(&buf) != 0) {   // should be impossible
-        MESSAGE("uname failed assuming no TLS support (errno=%d)\n", errno);
+      if (uname(&buf) < 0) {   // should be impossible
+        Log(kLog, __FILE__, __LINE__,
+            "uname failed assuming no TLS support (errno)", errno);
         kernel_supports_tls = false;
       } else if (strcasecmp(buf.sysname, "linux") == 0) {
         // The linux case: the first kernel to support TLS was 2.6.0
         if (buf.release[0] < '2' && buf.release[1] == '.')    // 0.x or 1.x
           kernel_supports_tls = false;
         else if (buf.release[0] == '2' && buf.release[1] == '.' &&
                  buf.release[2] >= '0' && buf.release[2] < '6' &&
                  buf.release[3] == '.')                       // 2.0 - 2.5
           kernel_supports_tls = false;
         else
           kernel_supports_tls = true;
+      } else if (strcasecmp(buf.sysname, "CYGWIN_NT-6.1-WOW64") == 0) {
+        // In my testing, this version of cygwin, at least, would hang
+        // when using TLS.
+        kernel_supports_tls = false;
       } else {        // some other kernel, we'll be optimisitic
         kernel_supports_tls = true;
       }
       // TODO(csilvers): VLOG(1) the tls status once we support RAW_VLOG
     }
 #  endif  // HAVE_DECL_UNAME
 #endif    // HAVE_TLS
 
 void ThreadCache::Init(pthread_t tid) {
   size_ = 0;
@@ skipping 142 matching lines @@
       const int batch_size = Static::sizemap()->num_objects_to_move(cl);
       if (list->max_length() > batch_size) {
         list->set_max_length(
             max<int>(list->max_length() - batch_size, batch_size));
       }
     }
     list->clear_lowwatermark();
   }
 
   IncreaseCacheLimit();
-
-//   int64 finish = CycleClock::Now();
-//   CycleTimer ct;
-//   MESSAGE("GC: %.0f ns\n", ct.CyclesToUsec(finish-start)*1000.0);
 }
 
 void ThreadCache::IncreaseCacheLimit() {
   SpinLockHolder h(Static::pageheap_lock());
   IncreaseCacheLimitLocked();
 }
 
 void ThreadCache::IncreaseCacheLimitLocked() {
   if (unclaimed_cache_space_ > 0) {
     // Possibly make unclaimed_cache_space_ negative.
@@ skipping 192 matching lines @@
   for (ThreadCache* h = thread_heaps_; h != NULL; h = h->next_) {
     // Increasing the total cache size should not circumvent the
     // slow-start growth of max_size_.
     if (ratio < 1.0) {
         h->max_size_ = static_cast<size_t>(h->max_size_ * ratio);
     }
     claimed += h->max_size_;
   }
   unclaimed_cache_space_ = overall_thread_cache_size_ - claimed;
   per_thread_cache_size_ = space;
-  //  TCMalloc_MESSAGE(__FILE__, __LINE__, "Threads %d => cache size %8d\n", n, int(space));
-}
-
-void ThreadCache::Print(TCMalloc_Printer* out) const {
-  for (int cl = 0; cl < kNumClasses; ++cl) {
-    out->printf("      %5" PRIuS " : %4" PRIuS " len; %4d lo; %4"PRIuS
-                " max; %4"PRIuS" overages;\n",
-                Static::sizemap()->ByteSizeForClass(cl),
-                list_[cl].length(),
-                list_[cl].lowwatermark(),
-                list_[cl].max_length(),
-                list_[cl].length_overages());
-  }
-}
-
-void ThreadCache::PrintThreads(TCMalloc_Printer* out) {
-  size_t actual_limit = 0;
-  for (ThreadCache* h = thread_heaps_; h != NULL; h = h->next_) {
-    h->Print(out);
-    actual_limit += h->max_size_;
-  }
-  out->printf("ThreadCache overall: %"PRIuS ", unclaimed: %"PRIdS
-              ", actual: %"PRIuS"\n",
-              overall_thread_cache_size_, unclaimed_cache_space_, actual_limit);
 }
 
 void ThreadCache::GetThreadStats(uint64_t* total_bytes, uint64_t* class_count) {
   for (ThreadCache* h = thread_heaps_; h != NULL; h = h->next_) {
     *total_bytes += h->Size();
     if (class_count) {
       for (int cl = 0; cl < kNumClasses; ++cl) {
         class_count[cl] += h->freelist_length(cl);
       }
     }
   }
 }
 
 void ThreadCache::set_overall_thread_cache_size(size_t new_size) {
   // Clip the value to a reasonable range
   if (new_size < kMinThreadCacheSize) new_size = kMinThreadCacheSize;
   if (new_size > (1<<30)) new_size = (1<<30);     // Limit to 1GB
   overall_thread_cache_size_ = new_size;
 
   RecomputePerThreadCacheSize();
 }
 
 }  // namespace tcmalloc