Add BumpPtrAllocator::getTotalMemory() to allow clients to query how much memory a BumpPtrAllocator allocated.

llvm-svn: 129727

2 files changed, 11 insertions, 0 deletions

diff --git a/llvm/include/llvm/Support/Allocator.h b/llvm/include/llvm/Support/Allocator.h
index c6807099f85..a2ad24ffead 100644
--- a/llvm/include/llvm/Support/Allocator.h
+++ b/llvm/include/llvm/Support/Allocator.h
@@ -177,6 +177,9 @@ public:
   unsigned GetNumSlabs() const;
 
   void PrintStats() const;
+  
+  /// Compute the total physical memory allocated by this allocator.
+  size_t getTotalMemory() const;
 };
 
 /// SpecificBumpPtrAllocator - Same as BumpPtrAllocator but allows only
diff --git a/llvm/lib/Support/Allocator.cpp b/llvm/lib/Support/Allocator.cpp
index 5e27df6628e..215b0f249d9 100644
--- a/llvm/lib/Support/Allocator.cpp
+++ b/llvm/lib/Support/Allocator.cpp
@@ -136,6 +136,14 @@ unsigned BumpPtrAllocator::GetNumSlabs() const {
   return NumSlabs;
 }
 
+size_t BumpPtrAllocator::getTotalMemory() const {
+  size_t TotalMemory = 0;
+  for (MemSlab *Slab = CurSlab; Slab != 0; Slab = Slab->NextPtr) {
+    TotalMemory += Slab->Size;
+  }
+  return TotalMemory;
+}
+  
 void BumpPtrAllocator::PrintStats() const {
   unsigned NumSlabs = 0;
   size_t TotalMemory = 0;