--- a/hotspot/make/aix/makefiles/vm.make	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/make/aix/makefiles/vm.make	Wed Nov 04 11:00:29 2015 -0800
@@ -81,6 +81,7 @@
 		-DVERSION_BUILD=$(VERSION_BUILD)
 VM_VER_DEFS   = -DHOTSPOT_VERSION_STRING="\"$(HOTSPOT_VERSION_STRING)\"" \
 		-DVERSION_STRING="\"$(VERSION_STRING)\""  \
+	        -DDEBUG_LEVEL="\"$(DEBUG_LEVEL)\"" \
 		$(JDK_VER_DEFS)
 HS_LIB_ARCH   = -DHOTSPOT_LIB_ARCH=\"$(LIBARCH)\"
 BUILD_USER    = -DHOTSPOT_BUILD_USER="\"$(HOTSPOT_BUILD_USER)\""

--- a/hotspot/make/bsd/makefiles/vm.make	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/make/bsd/makefiles/vm.make	Wed Nov 04 11:00:29 2015 -0800
@@ -80,6 +80,7 @@
 		-DVERSION_BUILD=$(VERSION_BUILD)
 VM_VER_DEFS   = -DHOTSPOT_VERSION_STRING="\"$(HOTSPOT_VERSION_STRING)\"" \
 		-DVERSION_STRING="\"$(VERSION_STRING)\""  \
+	        -DDEBUG_LEVEL="\"$(DEBUG_LEVEL)\"" \
 		$(JDK_VER_DEFS)
 HS_LIB_ARCH   = -DHOTSPOT_LIB_ARCH=\"$(LIBARCH)\"
 BUILD_USER    = -DHOTSPOT_BUILD_USER="\"$(HOTSPOT_BUILD_USER)\""

--- a/hotspot/make/linux/makefiles/vm.make	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/make/linux/makefiles/vm.make	Wed Nov 04 11:00:29 2015 -0800
@@ -82,6 +82,7 @@
 		-DVERSION_BUILD=$(VERSION_BUILD)
 VM_VER_DEFS   = -DHOTSPOT_VERSION_STRING="\"$(HOTSPOT_VERSION_STRING)\"" \
 		-DVERSION_STRING="\"$(VERSION_STRING)\""  \
+	        -DDEBUG_LEVEL="\"$(DEBUG_LEVEL)\"" \
 		$(JDK_VER_DEFS)
 HS_LIB_ARCH   = -DHOTSPOT_LIB_ARCH=\"$(LIBARCH)\"
 BUILD_USER    = -DHOTSPOT_BUILD_USER="\"$(HOTSPOT_BUILD_USER)\""

--- a/hotspot/make/solaris/makefiles/vm.make	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/make/solaris/makefiles/vm.make	Wed Nov 04 11:00:29 2015 -0800
@@ -76,6 +76,7 @@
 		-DVERSION_BUILD=$(VERSION_BUILD)
 VM_VER_DEFS   = -DHOTSPOT_VERSION_STRING="\"$(HOTSPOT_VERSION_STRING)\"" \
 		-DVERSION_STRING="\"$(VERSION_STRING)\""  \
+	        -DDEBUG_LEVEL="\"$(DEBUG_LEVEL)\"" \
 		$(JDK_VER_DEFS)
 HS_LIB_ARCH   = -DHOTSPOT_LIB_ARCH=\"$(LIBARCH)\"
 BUILD_USER    = -DHOTSPOT_BUILD_USER="\"$(HOTSPOT_BUILD_USER)\""

--- a/hotspot/make/windows/makefiles/defs.make	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/make/windows/makefiles/defs.make	Wed Nov 04 11:00:29 2015 -0800
@@ -184,6 +184,7 @@
 MAKE_ARGS += VERSION_SECURITY=$(VERSION_SECURITY)
 MAKE_ARGS += VERSION_PATCH=$(VERSION_PATCH)
 MAKE_ARGS += VERSION_BUILD=$(VERSION_BUILD)
+MAKE_ARGS += DEBUG_LEVEL=$(DEBUG_LEVEL)
 
 # JDK_DOTVER and JDK_VER are needed in Windows RC files
 COMMA:=,

--- a/hotspot/make/windows/makefiles/vm.make	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/make/windows/makefiles/vm.make	Wed Nov 04 11:00:29 2015 -0800
@@ -65,6 +65,7 @@
 CXX_FLAGS=$(CXX_FLAGS) /D "VERSION_PATCH=$(VERSION_PATCH)"
 CXX_FLAGS=$(CXX_FLAGS) /D "VERSION_BUILD=$(VERSION_BUILD)"
 CXX_FLAGS=$(CXX_FLAGS) /D "VERSION_STRING=\"$(VERSION_STRING)\""
+CXX_FLAGS=$(CXX_FLAGS) /D "DEBUG_LEVEL=\"$(DEBUG_LEVEL)\""
 CXX_FLAGS=$(CXX_FLAGS) /D "HOTSPOT_LIB_ARCH=\"$(HOTSPOT_LIB_ARCH)\""
 CXX_FLAGS=$(CXX_FLAGS) /D "HOTSPOT_BUILD_TARGET=\"$(BUILD_FLAVOR)\""
 CXX_FLAGS=$(CXX_FLAGS) /D "HOTSPOT_BUILD_USER=\"$(BuildUser)\""

--- a/hotspot/make/windows/projectfiles/common/Makefile	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/make/windows/projectfiles/common/Makefile	Wed Nov 04 11:00:29 2015 -0800
@@ -115,7 +115,7 @@
 VERSION_SECURITY=$(STANDALONE_JDK_SECURITY_VER)
 VERSION_PATCH=$(STANDALONE_JDK_PATCH_VER)
 
-ReleaseOptions = -define HOTSPOT_RELEASE_VERSION=$(HOTSPOT_RELEASE_VERSION) -define JRE_RELEASE_VERSION=$(JRE_RELEASE_VERSION) -define HOTSPOT_VM_DISTRO=$(HOTSPOT_VM_DISTRO) -define VERSION_MAJOR=$(VERSION_MAJOR) -define VERSION_MINOR=$(VERSION_MINOR) -define VERSION_SECURITY=$(VERSION_SECURITY) -define VERSION_PATCH=$(VERSION_PATCH) -define VISUAL_STUDIO_BUILD=true
+ReleaseOptions = -define HOTSPOT_RELEASE_VERSION=$(HOTSPOT_RELEASE_VERSION) -define JRE_RELEASE_VERSION=$(JRE_RELEASE_VERSION) -define HOTSPOT_VM_DISTRO=$(HOTSPOT_VM_DISTRO) -define VERSION_MAJOR=$(VERSION_MAJOR) -define VERSION_MINOR=$(VERSION_MINOR) -define VERSION_SECURITY=$(VERSION_SECURITY) -define VERSION_PATCH=$(VERSION_PATCH) -define DEBUG_LEVEL=$(DEBUG_LEVEL) -define VISUAL_STUDIO_BUILD=true
 ProjectCreatorIDEOptions = $(ProjectCreatorIDEOptions) $(ReleaseOptions)
 
 $(HOTSPOTBUILDSPACE)/$(ProjectFile): $(HOTSPOTBUILDSPACE)/classes/ProjectCreator.class

--- a/hotspot/src/share/vm/runtime/arguments.cpp	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/src/share/vm/runtime/arguments.cpp	Wed Nov 04 11:00:29 2015 -0800
@@ -197,6 +197,7 @@
   PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(),  false));
   PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(),  false));
   PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(),  true));
+  PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(),  false));
 
   // Following are JVMTI agent writable properties.
   // Properties values are set to NULL and they are

--- a/hotspot/src/share/vm/runtime/statSampler.cpp	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/src/share/vm/runtime/statSampler.cpp	Wed Nov 04 11:00:29 2015 -0800
@@ -223,6 +223,7 @@
   "java.vm.name",
   "java.vm.vendor",
   "java.vm.info",
+  "jdk.debug",
   "java.library.path",
   "java.class.path",
   "java.version",

--- a/hotspot/src/share/vm/runtime/vm_version.cpp	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/src/share/vm/runtime/vm_version.cpp	Wed Nov 04 11:00:29 2015 -0800
@@ -64,6 +64,10 @@
   #error VERSION_STRING must be defined
 #endif
 
+#ifndef DEBUG_LEVEL
+  #error DEBUG_LEVEL must be defined
+#endif
+
 // NOTE: Builds within Visual Studio do not define the build target in
 //       HOTSPOT_VERSION_STRING, so it must be done here
 #if defined(VISUAL_STUDIO_BUILD) && !defined(PRODUCT)
@@ -243,6 +247,10 @@
   return HOTSPOT_BUILD_USER;
 }
 
+const char *Abstract_VM_Version::jdk_debug_level() {
+  return DEBUG_LEVEL;
+}
+
 unsigned int Abstract_VM_Version::jvm_version() {
   return ((Abstract_VM_Version::vm_major_version() & 0xFF) << 24) |
          ((Abstract_VM_Version::vm_minor_version() & 0xFF) << 16) |

--- a/hotspot/src/share/vm/runtime/vm_version.hpp	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/src/share/vm/runtime/vm_version.hpp	Wed Nov 04 11:00:29 2015 -0800
@@ -87,6 +87,7 @@
   // Internal version providing additional build information
   static const char* internal_vm_info_string();
   static const char* jre_release_version();
+  static const char* jdk_debug_level();
 
   // does HW support an 8-byte compare-exchange operation?
   static bool supports_cx8()  {

--- a/hotspot/test/testlibrary/jdk/test/lib/Platform.java	Mon Nov 02 09:11:55 2015 -0800
+++ b/hotspot/test/testlibrary/jdk/test/lib/Platform.java	Wed Nov 04 11:00:29 2015 -0800
@@ -29,7 +29,7 @@
     private static final String osName      = System.getProperty("os.name");
     private static final String dataModel   = System.getProperty("sun.arch.data.model");
     private static final String vmVersion   = System.getProperty("java.vm.version");
-    private static final String javaVersion = System.getProperty("java.version");
+    private static final String jdkDebug    = System.getProperty("jdk.debug");
     private static final String osArch      = System.getProperty("os.arch");
     private static final String vmName      = System.getProperty("java.vm.name");
     private static final String userName    = System.getProperty("user.name");
@@ -100,8 +100,7 @@
     }
 
     public static boolean isDebugBuild() {
-        return (vmVersion.toLowerCase().contains("debug") ||
-                javaVersion.toLowerCase().contains("debug"));
+        return (jdkDebug.toLowerCase().contains("debug"));
     }
 
     public static String getVMVersion() {