--- a/common/conf/jib-profiles.js	Mon Sep 26 14:57:00 2016 +0200
+++ b/common/conf/jib-profiles.js	Tue Sep 27 15:33:34 2016 +0200
@@ -224,6 +224,23 @@
     common.configure_args_slowdebug = ["--with-debug-level=slowdebug"],
     common.organization = "jpg.infra.builddeps"
 
+    var boot_jdk_revision = "8";
+    var boot_jdk_subdirpart = "1.8.0";
+    // JDK 8 does not work on sparc M7 cpus, need a newer update when building
+    // on such hardware.
+    if (input.build_cpu == "sparcv9") {
+       var cpu_brand = $EXEC("bash -c \"kstat -m cpu_info | grep brand | head -n1 | awk '{ print \$2 }'\"");
+       if (cpu_brand.trim() == 'SPARC-M7') {
+           boot_jdk_revision = "8u20";
+           boot_jdk_subdirpart = "1.8.0_20";
+       }
+    }
+    common.boot_jdk_revision = boot_jdk_revision;
+    common.boot_jdk_subdirpart = boot_jdk_subdirpart;
+    common.boot_jdk_home = input.get("boot_jdk", "home_path") + "/jdk"
+        + common.boot_jdk_subdirpart
+        + (input.build_os == "macosx" ? ".jdk/Contents/Home" : "");
+
     return common;
 };
 
@@ -333,8 +350,11 @@
         "run-test": {
             target_os: input.build_os,
             target_cpu: input.build_cpu,
-            dependencies: [ "jtreg", "gnumake" ],
-            labels: "test"
+            dependencies: [ "jtreg", "gnumake", "boot_jdk" ],
+            labels: "test",
+            environment: {
+                "JT_JAVA": common.boot_jdk_home
+            }
         }
     };
     profiles = concatObjects(profiles, testOnlyProfiles);
@@ -357,18 +377,6 @@
     var boot_jdk_platform = input.build_os + "-"
         + (input.build_cpu == "x86" ? "i586" : input.build_cpu);
 
-    var boot_jdk_revision = "8";
-    var boot_jdk_subdirpart = "1.8.0";
-    // JDK 8 does not work on sparc M7 cpus, need a newer update when building
-    // on such hardware.
-    if (input.build_cpu == "sparcv9") {
-       var cpu_brand = $EXEC("bash -c \"kstat -m cpu_info | grep brand | head -n1 | awk '{ print \$2 }'\"");
-       if (cpu_brand.trim() == 'SPARC-M7') {
-           boot_jdk_revision = "8u20";
-           boot_jdk_subdirpart = "1.8.0_20";
-       }
-    }
-
     var devkit_platform_revisions = {
         linux_x64: "gcc4.9.2-OEL6.4+1.0",
         macosx_x64: "Xcode6.3-MacOSX10.9+1.0",
@@ -386,12 +394,12 @@
         boot_jdk: {
             server: "javare",
             module: "jdk",
-            revision: boot_jdk_revision,
+            revision: common.boot_jdk_revision,
             checksum_file: boot_jdk_platform + "/MD5_VALUES",
-            file: boot_jdk_platform + "/jdk-" + boot_jdk_revision + "-" + boot_jdk_platform + ".tar.gz",
-            configure_args: (input.build_os == "macosx"
-                ? "--with-boot-jdk=" + input.get("boot_jdk", "install_path") + "/jdk" + boot_jdk_subdirpart + ".jdk/Contents/Home"
-                : "--with-boot-jdk=" + input.get("boot_jdk", "install_path") + "/jdk" + boot_jdk_subdirpart)
+            file: boot_jdk_platform + "/jdk-" + common.boot_jdk_revision
+                + "-" + boot_jdk_platform + ".tar.gz",
+            configure_args: "--with-boot-jdk=" + common.boot_jdk_home,
+            environment_path: common.boot_jdk_home
         },
 
         devkit: {
@@ -420,7 +428,8 @@
             build_number: "b03",
             checksum_file: "MD5_VALUES",
             file: "jtreg_bin-4.2.zip",
-            environment_name: "JT_HOME"
+            environment_name: "JT_HOME",
+            environment_path: input.get("jtreg", "install_path") + "/jtreg/bin"
         },
 
         gnumake: {

--- a/make/MainSupport.gmk	Mon Sep 26 14:57:00 2016 +0200
+++ b/make/MainSupport.gmk	Tue Sep 27 15:33:34 2016 +0200
@@ -31,11 +31,13 @@
 _MAINSUPPORT_GMK := 1
 
 # Run the tests specified by $1, with PRODUCT_HOME specified by $2
+# JT_JAVA is picked up by the jtreg launcher and used to run Jtreg itself.
 define RunTests
 	($(CD) $(SRC_ROOT)/test && $(MAKE) $(MAKE_ARGS) -j1 -k MAKEFLAGS= \
 	    JT_HOME=$(JT_HOME) PRODUCT_HOME=$(strip $2) \
 	    TEST_IMAGE_DIR=$(TEST_IMAGE_DIR) \
 	    ALT_OUTPUTDIR=$(OUTPUT_ROOT) TEST_JOBS=$(TEST_JOBS) \
+	    JT_JAVA=$(BOOT_JDK) \
 	    JOBS=$(JOBS) $1) || true
 endef