# HG changeset patch
# User jmasa
# Date 1235626824 28800
# Node ID 71c275bfba43a99d4e06783b340fb027182e7cb7
# Parent  b4bd2276d31404b37481fd903c5970f8afdd3290
6806226: Signed integer overflow in growable array code causes JVM crash
Summary: Workaround the overflow by doing the intermediate calculations in an unsigned variable.
Reviewed-by: ysr, jcoomes

diff -r b4bd2276d314 -r 71c275bfba43 src/share/vm/utilities/growableArray.cpp
--- a/src/share/vm/utilities/growableArray.cpp	Wed Feb 25 16:39:22 2009 -0800
+++ b/src/share/vm/utilities/growableArray.cpp	Wed Feb 25 21:40:24 2009 -0800
@@ -43,11 +43,13 @@
 #endif
 
 void* GenericGrowableArray::raw_allocate(int elementSize) {
+  assert(_max >= 0, "integer overflow");
+  size_t byte_size = elementSize * (size_t) _max;
   if (on_stack()) {
-    return (void*)resource_allocate_bytes(elementSize * _max);
+    return (void*)resource_allocate_bytes(byte_size);
   } else if (on_C_heap()) {
-    return (void*)AllocateHeap(elementSize * _max, "GrET in " __FILE__);
+    return (void*)AllocateHeap(byte_size, "GrET in " __FILE__);
   } else {
-    return _arena->Amalloc(elementSize * _max);
+    return _arena->Amalloc(byte_size);
   }
 }