summaryrefslogtreecommitdiffstats
path: root/tools/memory-profiler/UncensoredAllocator.cpp
diff options
context:
space:
mode:
authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /tools/memory-profiler/UncensoredAllocator.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
downloadUXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip
Add m-esr52 at 52.6.0
Diffstat (limited to 'tools/memory-profiler/UncensoredAllocator.cpp')
-rw-r--r--tools/memory-profiler/UncensoredAllocator.cpp121
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