--- a/agent/ChangeLog	Mon May 18 00:45:30 2015 +0900
+++ b/agent/ChangeLog	Mon May 18 00:47:53 2015 +0900
@@ -1,3 +1,7 @@
+2015-05-18 KUBOTA Yuji  <kubota.yuji@lab.ntt.co.jp>
+
+	* Bug 2366: Change the calculation of g1StartAddr to create the bitmap for G1GC
+
 2015-05-18 KUBOTA Yuji  <kubota.yuji@lab.ntt.co.jp>
 
 	* Bug 2365: Adapt to G1GC hook points of JDK-8049421

--- a/agent/src/oopUtil.cpp	Mon May 18 00:45:30 2015 +0900
+++ b/agent/src/oopUtil.cpp	Mon May 18 00:47:53 2015 +0900
@@ -2141,13 +2141,13 @@
  */
 bool setupForG1GC(size_t maxMemSize) {
   
-  off_t offsetG1Committed    = -1;
+  off_t offsetReserved       = -1;
   off_t offsetMemRegionStart = -1;
   TOffsetNameMap ofsMap[] = {
-    {"G1CollectedHeap",        "_g1_committed",
-      &offsetG1Committed,    NULL},
-    {"MemRegion",              "_start",
-      &offsetMemRegionStart, NULL},
+    {"CollectedHeap",         "_reserved",
+      &offsetReserved,        NULL},
+    {"MemRegion",             "_start",
+      &offsetMemRegionStart,  NULL},
     /* End flag. */
     {NULL, NULL, NULL, NULL}
   };
@@ -2155,7 +2155,7 @@
   vmScanner->GetDataFromVMStructs(ofsMap);
   
   /* If failure getting offset. */
-  if (unlikely(offsetG1Committed == -1 || offsetMemRegionStart == -1
+  if (unlikely(offsetReserved == -1 || offsetMemRegionStart == -1
     || collectedHeap == NULL)) {
     
     PRINT_WARN_MSG("Failure getting information form JVM."
@@ -2164,9 +2164,9 @@
   }
   
   /* Calculate about G1GC memory information. */
-  void *g1Committed = *(void**)incAddress(collectedHeap, offsetG1Committed);
-  void *g1StartAddr = incAddress(g1Committed, offsetMemRegionStart);
-  if (unlikely(g1Committed == NULL || g1StartAddr == NULL)) {
+  void *reservedRegion = *(void**)incAddress(collectedHeap, offsetReserved);
+  void *g1StartAddr = incAddress(reservedRegion, offsetMemRegionStart);
+  if (unlikely(reservedRegion == NULL || g1StartAddr == NULL)) {
     
     PRINT_WARN_MSG("Failure getting information form JVM."
       " info:G1 from:calculate");