1 files changed, 69 insertions, 7 deletions
diff --git a/indra/llcommon/llmemory.cpp b/indra/llcommon/llmemory.cpp
index e0b2aa87c2..ae11988df8 100755
--- a/indra/llcommon/llmemory.cpp
+++ b/indra/llcommon/llmemory.cpp
@@ -63,13 +63,18 @@ LLPrivateMemoryPoolManager::mem_allocation_info_t LLPrivateMemoryPoolManager::sM
 
 void ll_assert_aligned_func(uintptr_t ptr,U32 alignment)
 {
-#ifdef SHOW_ASSERT
-	// Redundant, place to set breakpoints.
-	if (ptr%alignment!=0)
-	{
-		LL_WARNS() << "alignment check failed" << LL_ENDL;
-	}
-	llassert(ptr%alignment==0);
+#if defined(LL_WINDOWS) && defined(LL_DEBUG_BUFFER_OVERRUN)
+	//do not check
+	return;
+#else
+	#ifdef SHOW_ASSERT
+		// Redundant, place to set breakpoints.
+		if (ptr%alignment!=0)
+		{
+			LL_WARNS() << "alignment check failed" << LL_ENDL;
+		}
+		llassert(ptr%alignment==0);
+	#endif
 #endif
 }
 
@@ -2148,3 +2153,60 @@ void LLPrivateMemoryPoolTester::fragmentationtest()
 }
 #endif
 //--------------------------------------------------------------------
+
+#if defined(LL_WINDOWS) && defined(LL_DEBUG_BUFFER_OVERRUN)
+
+#include <map>
+
+struct mem_info {
+	std::map<void*, void*> memory_info;
+	LLMutex mutex;
+
+	static mem_info& get() {
+		static mem_info instance;
+		return instance;
+	}
+
+private:
+	mem_info(){}
+};
+
+void* ll_aligned_malloc_fallback( size_t size, int align )
+{
+	SYSTEM_INFO sysinfo;
+	GetSystemInfo(&sysinfo);
+	
+	unsigned int for_alloc = sysinfo.dwPageSize;
+	while(for_alloc < size) for_alloc += sysinfo.dwPageSize;
+	
+	void *p = VirtualAlloc(NULL, for_alloc+sysinfo.dwPageSize, MEM_COMMIT|MEM_RESERVE, PAGE_READWRITE);
+	if(NULL == p) {
+		// call debugger
+		__asm int 3;
+	}
+	DWORD old;
+	BOOL Res = VirtualProtect((void*)((char*)p + for_alloc), sysinfo.dwPageSize, PAGE_NOACCESS, &old);
+	if(FALSE == Res) {
+		// call debugger
+		__asm int 3;
+	}
+
+	void* ret = (void*)((char*)p + for_alloc-size);
+	
+	{
+		LLMutexLock lock(&mem_info::get().mutex);
+		mem_info::get().memory_info.insert(std::pair<void*, void*>(ret, p));
+	}
+	
+
+	return ret;
+}
+
+void ll_aligned_free_fallback( void* ptr )
+{
+	LLMutexLock lock(&mem_info::get().mutex);
+	VirtualFree(mem_info::get().memory_info.find(ptr)->second, 0, MEM_RELEASE);
+	mem_info::get().memory_info.erase(ptr);
+}
+
+#endif