Add m-esr52 at 52.6.0

1 files changed, 121 insertions, 0 deletions

diff --git a/tools/memory-profiler/UncensoredAllocator.cpp b/tools/memory-profiler/UncensoredAllocator.cpp
new file mode 100644
index 000000000..92caeb633
--- /dev/null
+++ b/tools/memory-profiler/UncensoredAllocator.cpp
@@ -0,0 +1,121 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "UncensoredAllocator.h"
+
+#include "mozilla/Assertions.h"
+#include "mozilla/Unused.h"
+
+#include "MainThreadUtils.h"
+#include "jsfriendapi.h"
+#include "nsDebug.h"
+#include "prlock.h"
+#ifdef MOZ_REPLACE_MALLOC
+#include "replace_malloc_bridge.h"
+#endif
+
+namespace mozilla {
+
+#ifdef MOZ_REPLACE_MALLOC
+MOZ_THREAD_LOCAL(bool) MallocHook::mEnabledTLS;
+NativeProfiler* MallocHook::mNativeProfiler;
+malloc_hook_table_t MallocHook::mMallocHook;
+#endif
+
+AutoUseUncensoredAllocator::AutoUseUncensoredAllocator()
+{
+#ifdef MOZ_REPLACE_MALLOC
+  MallocHook::mEnabledTLS.set(false);
+#endif
+}
+
+AutoUseUncensoredAllocator::~AutoUseUncensoredAllocator()
+{
+#ifdef MOZ_REPLACE_MALLOC
+  MallocHook::mEnabledTLS.set(true);
+#endif
+}
+
+bool
+MallocHook::Enabled()
+{
+#ifdef MOZ_REPLACE_MALLOC
+  return mEnabledTLS.get() && mNativeProfiler;
+#else
+  return false;
+#endif
+}
+
+void*
+MallocHook::SampleNative(void* aAddr, size_t aSize)
+{
+#ifdef MOZ_REPLACE_MALLOC
+  if (MallocHook::Enabled()) {
+    mNativeProfiler->sampleNative(aAddr, aSize);
+  }
+#endif
+  return aAddr;
+}
+
+void
+MallocHook::RemoveNative(void* aAddr)
+{
+#ifdef MOZ_REPLACE_MALLOC
+  if (MallocHook::Enabled()) {
+    mNativeProfiler->removeNative(aAddr);
+  }
+#endif
+}
+
+void
+MallocHook::Initialize()
+{
+#ifdef MOZ_REPLACE_MALLOC
+  MOZ_ASSERT(NS_IsMainThread());
+  mMallocHook.free_hook = RemoveNative;
+  mMallocHook.malloc_hook = SampleNative;
+  ReplaceMallocBridge* bridge = ReplaceMallocBridge::Get(3);
+  if (bridge) {
+    mozilla::Unused << bridge->RegisterHook("memory-profiler", nullptr, nullptr);
+  }
+
+  bool success = mEnabledTLS.init();
+  if (NS_WARN_IF(!success)) {
+    return;
+  }
+#endif
+}
+
+void
+MallocHook::Enable(NativeProfiler* aNativeProfiler)
+{
+#ifdef MOZ_REPLACE_MALLOC
+  MOZ_ASSERT(NS_IsMainThread());
+  ReplaceMallocBridge* bridge = ReplaceMallocBridge::Get(3);
+  if (bridge) {
+    const malloc_table_t* alloc_funcs =
+      bridge->RegisterHook("memory-profiler", nullptr, &mMallocHook);
+    if (alloc_funcs) {
+      mNativeProfiler = aNativeProfiler;
+    }
+  }
+#endif
+}
+
+void
+MallocHook::Disable()
+{
+#ifdef MOZ_REPLACE_MALLOC
+  MOZ_ASSERT(NS_IsMainThread());
+  ReplaceMallocBridge* bridge = ReplaceMallocBridge::Get(3);
+  if (bridge) {
+    bridge->RegisterHook("memory-profiler", nullptr, nullptr);
+    mNativeProfiler = nullptr;
+  }
+#endif
+}
+
+} // namespace mozilla