ZGC: The Z Garbage Collector v93

openjdk · Jun 12, 2018 · 19efc73 · 19efc73
1 parent f805d6a
commit 19efc73
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Showing 322 changed files with 27,196 additions and 79 deletions.
diff --git a/make/autoconf/hotspot.m4 b/make/autoconf/hotspot.m4
@@ -25,7 +25,7 @@
 
 # All valid JVM features, regardless of platform
 VALID_JVM_FEATURES="compiler1 compiler2 zero minimal dtrace jvmti jvmci \
-    graal vm-structs jni-check services management cmsgc g1gc parallelgc serialgc epsilongc nmt cds \
+    graal vm-structs jni-check services management cmsgc g1gc epsilongc parallelgc serialgc zgc nmt cds \
     static-build link-time-opt aot jfr"
 
 # Deprecated JVM features (these are ignored, but with a warning)
@@ -328,6 +328,19 @@ AC_DEFUN_ONCE([HOTSPOT_SETUP_JVM_FEATURES],
     fi
   fi
 
+  # Only enable ZGC on Linux x86_64
+  AC_MSG_CHECKING([if zgc should be built])
+  if HOTSPOT_CHECK_JVM_FEATURE(zgc); then
+    if test "x$OPENJDK_TARGET_OS" = "xlinux" && test "x$OPENJDK_TARGET_CPU" = "xx86_64"; then
+      AC_MSG_RESULT([yes])
+    else
+      DISABLED_JVM_FEATURES="$DISABLED_JVM_FEATURES zgc"
+      AC_MSG_RESULT([no, platform not supported])
+    fi
+  else
+    AC_MSG_RESULT([no])
+  fi
+
   # Turn on additional features based on other parts of configure
   if test "x$INCLUDE_DTRACE" = "xtrue"; then
     JVM_FEATURES="$JVM_FEATURES dtrace"

diff --git a/make/conf/jib-profiles.js b/make/conf/jib-profiles.js
@@ -694,6 +694,14 @@ var getJibProfilesProfiles = function (input, common, data) {
                        profiles[openName].artifacts["jdk"].remote));
     });
 
+    // Enable ZGC in linux-x64-open builds
+    [ "linux-x64-open" ].forEach(function (name) {
+        var configureArgs = { configure_args: [ "--with-jvm-features=zgc" ] };
+        var debugName = name + common.debug_suffix;
+        profiles[name] = concatObjects(profiles[name], configureArgs);
+        profiles[debugName] = concatObjects(profiles[debugName], configureArgs);
+    });
+
     // Profiles used to run tests. Used in JPRT and Mach 5.
     var testOnlyProfiles = {
         "run-test-jprt": {

diff --git a/make/hotspot/lib/JvmFeatures.gmk b/make/hotspot/lib/JvmFeatures.gmk
@@ -160,6 +160,11 @@ ifneq ($(call check-jvm-feature, epsilongc), true)
   JVM_EXCLUDE_PATTERNS += gc/epsilon
 endif
 
+ifneq ($(call check-jvm-feature, zgc), true)
+  JVM_CFLAGS_FEATURES += -DINCLUDE_ZGC=0
+  JVM_EXCLUDE_PATTERNS += gc/z
+endif
+
 ifneq ($(call check-jvm-feature, jfr), true)
   JVM_CFLAGS_FEATURES += -DINCLUDE_JFR=0
   JVM_EXCLUDE_PATTERNS += jfr

diff --git a/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp b/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
@@ -1346,7 +1346,11 @@ void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_Patch
       __ decode_heap_oop(dest->as_register());
     }
 #endif
-    __ verify_oop(dest->as_register());
+
+    // Load barrier has not yet been applied, so ZGC can't verify the oop here
+    if (!UseZGC) {
+      __ verify_oop(dest->as_register());
+    }
   } else if (type == T_ADDRESS && addr->disp() == oopDesc::klass_offset_in_bytes()) {
 #ifdef _LP64
     if (UseCompressedClassPointers) {