Squashed 'third_party/gperftools/' content from commit 54505f1
Change-Id: Id02e833828732b0efe7dac722b8485279e67c5fa
git-subtree-dir: third_party/gperftools
git-subtree-split: 54505f1d50c2d1f4676f5e87090b64a117fd980e
diff --git a/src/static_vars.cc b/src/static_vars.cc
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--- /dev/null
+++ b/src/static_vars.cc
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+// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
+// 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
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// 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 "static_vars.h"
+#include <stddef.h> // for NULL
+#include <new> // for operator new
+#ifdef HAVE_PTHREAD
+#include <pthread.h> // for pthread_atfork
+#endif
+#include "internal_logging.h" // for CHECK_CONDITION
+#include "common.h"
+#include "sampler.h" // for Sampler
+#include "getenv_safe.h" // TCMallocGetenvSafe
+#include "base/googleinit.h"
+
+namespace tcmalloc {
+
+#if defined(HAVE_FORK) && defined(HAVE_PTHREAD)
+// These following two functions are registered via pthread_atfork to make
+// sure the central_cache locks remain in a consisten state in the forked
+// version of the thread.
+
+void CentralCacheLockAll()
+{
+ Static::pageheap_lock()->Lock();
+ for (int i = 0; i < kNumClasses; ++i)
+ Static::central_cache()[i].Lock();
+}
+
+void CentralCacheUnlockAll()
+{
+ for (int i = 0; i < kNumClasses; ++i)
+ Static::central_cache()[i].Unlock();
+ Static::pageheap_lock()->Unlock();
+}
+#endif
+
+SpinLock Static::pageheap_lock_(SpinLock::LINKER_INITIALIZED);
+SizeMap Static::sizemap_;
+CentralFreeListPadded Static::central_cache_[kNumClasses];
+PageHeapAllocator<Span> Static::span_allocator_;
+PageHeapAllocator<StackTrace> Static::stacktrace_allocator_;
+Span Static::sampled_objects_;
+PageHeapAllocator<StackTraceTable::Bucket> Static::bucket_allocator_;
+StackTrace* Static::growth_stacks_ = NULL;
+PageHeap* Static::pageheap_ = NULL;
+
+
+void Static::InitStaticVars() {
+ sizemap_.Init();
+ span_allocator_.Init();
+ span_allocator_.New(); // Reduce cache conflicts
+ span_allocator_.New(); // Reduce cache conflicts
+ stacktrace_allocator_.Init();
+ bucket_allocator_.Init();
+ // Do a bit of sanitizing: make sure central_cache is aligned properly
+ CHECK_CONDITION((sizeof(central_cache_[0]) % 64) == 0);
+ for (int i = 0; i < kNumClasses; ++i) {
+ central_cache_[i].Init(i);
+ }
+
+ // It's important to have PageHeap allocated, not in static storage,
+ // so that HeapLeakChecker does not consider all the byte patterns stored
+ // in is caches as pointers that are sources of heap object liveness,
+ // which leads to it missing some memory leaks.
+ pageheap_ = new (MetaDataAlloc(sizeof(PageHeap))) PageHeap;
+
+ bool aggressive_decommit =
+ tcmalloc::commandlineflags::StringToBool(
+ TCMallocGetenvSafe("TCMALLOC_AGGRESSIVE_DECOMMIT"), true);
+
+ pageheap_->SetAggressiveDecommit(aggressive_decommit);
+
+ DLL_Init(&sampled_objects_);
+ Sampler::InitStatics();
+}
+
+
+#if defined(HAVE_FORK) && defined(HAVE_PTHREAD)
+
+static inline
+void SetupAtForkLocksHandler()
+{
+#if !defined(__APPLE__)
+ pthread_atfork(CentralCacheLockAll, // parent calls before fork
+ CentralCacheUnlockAll, // parent calls after fork
+ CentralCacheUnlockAll); // child calls after fork
+#endif
+}
+REGISTER_MODULE_INITIALIZER(tcmalloc_fork_handler, SetupAtForkLocksHandler());
+
+#endif
+
+} // namespace tcmalloc