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src/MemDebug.cpp

@@ -0,0 +1,69 @@
+#include "stdlib.h"
+#include  <mutex>
+#ifdef DEBUG
+
+
+static std::mutex memMutex;
+
+struct MemStats {
+    size_t allocated = 0;
+    size_t allocations = 0;
+};
+
+MemStats memStats;
+
+void *operator new(size_t size)
+{
+    { 
+        std::lock_guard lock(memMutex);
+        memStats.allocated += size;
+        memStats.allocations++;
+    }
+
+    char *p = (char*)malloc(size+8);
+    ((size_t*)p)[0] = size;
+    return p+8;
+}
+
+void operator delete(void*mem)
+{
+    char *p = ((char*)mem);
+    size_t size = *(size_t*)(p-8);
+
+    {
+        std::lock_guard lock(memMutex);
+        memStats.allocated -= size;
+        memStats.allocations--;
+    }
+
+
+    free(p-8);
+}
+
+void* operator new[](size_t size)
+{
+    {
+        std::lock_guard lock(memMutex);
+        memStats.allocated += size;
+        memStats.allocations++;
+    }
+
+    char *p = (char*)malloc(size+8);
+    ((size_t*)p)[0] = size;
+    return p+8;
+}
+
+void operator delete[](void*mem)
+{
+    char *p = ((char*)mem);
+    size_t size = *(size_t*)(p-8);
+    {
+        std::lock_guard lock(memMutex);
+        memStats.allocated -= size;
+        memStats.allocations--;
+    }
+
+    free(p-8);
+}
+
+#endif