From 7e813c23e3520ea2bd69b5489a2731792a5f6e05 Mon Sep 17 00:00:00 2001
From: Jim Mathies <jmathies@mozilla.com>
Date: Thu, 7 Jan 2016 13:57:42 -0600
Subject: [PATCH] Bug 1107702 - Try to avoid internal memory exhaustion
 problems with the Windows api GetAdaptersInfo by making a priming call to the
 api during startup. r=jesup

---
 dom/media/MediaManager.cpp       | 25 +++++++++++++++++++++++++
 dom/media/MediaManager.h         |  1 +
 layout/build/nsLayoutStatics.cpp |  1 +
 3 files changed, 27 insertions(+)

diff --git a/dom/media/MediaManager.cpp b/dom/media/MediaManager.cpp
index 25302692ae2..11f24732064 100644
--- a/dom/media/MediaManager.cpp
+++ b/dom/media/MediaManager.cpp
@@ -78,6 +78,9 @@
 #endif
 #if defined (XP_WIN)
 #include "mozilla/WindowsVersion.h"
+#include <winsock2.h>
+#include <iphlpapi.h>
+#include <tchar.h>
 #endif
 
 // GetCurrentTime is defined in winbase.h as zero argument macro forwarding to
@@ -1640,6 +1643,28 @@ MediaManager::GetNonE10sParent()
   return mNonE10sParent;
 }
 
+/* static */ void
+MediaManager::StartupInit()
+{
+#ifdef WIN32
+  if (IsVistaOrLater() && !IsWin8OrLater()) {
+    // Bug 1107702 - Older Windows fail in GetAdaptersInfo (and others) if the
+    // first(?) call occurs after the process size is over 2GB (kb/2588507).
+    // Attempt to 'prime' the pump by making a call at startup.
+    unsigned long out_buf_len = sizeof(IP_ADAPTER_INFO);
+    PIP_ADAPTER_INFO pAdapterInfo = (IP_ADAPTER_INFO *) moz_xmalloc(out_buf_len);
+    if (GetAdaptersInfo(pAdapterInfo, &out_buf_len) == ERROR_BUFFER_OVERFLOW) {
+      free(pAdapterInfo);
+      pAdapterInfo = (IP_ADAPTER_INFO *) moz_xmalloc(out_buf_len);
+      GetAdaptersInfo(pAdapterInfo, &out_buf_len);
+    }
+    if (pAdapterInfo) {
+      free(pAdapterInfo);
+    }
+  }
+#endif
+}
+
 /* static */
 void
 MediaManager::PostTask(const tracked_objects::Location& from_here, Task* task)
diff --git a/dom/media/MediaManager.h b/dom/media/MediaManager.h
index fc1c7bc4118..370bf9e3a1e 100644
--- a/dom/media/MediaManager.h
+++ b/dom/media/MediaManager.h
@@ -415,6 +415,7 @@ public:
   // from MediaManager thread.
   static MediaManager* Get();
   static MediaManager* GetIfExists();
+  static void StartupInit();
   static void PostTask(const tracked_objects::Location& from_here, Task* task);
 #ifdef DEBUG
   static bool IsInMediaThread();
diff --git a/layout/build/nsLayoutStatics.cpp b/layout/build/nsLayoutStatics.cpp
index 2da3938d6c9..f72ca91dcfd 100644
--- a/layout/build/nsLayoutStatics.cpp
+++ b/layout/build/nsLayoutStatics.cpp
@@ -261,6 +261,7 @@ nsLayoutStatics::Initialize()
   }
 
   AsyncLatencyLogger::InitializeStatics();
+  MediaManager::StartupInit();
   CubebUtils::InitLibrary();
 
   nsContentSink::InitializeStatics();