# HG changeset patch
# User jcm
# Date 1459846000 25200
# Node ID 9989add27bf4fcb8a761687997e12b888af161bb
# Parent  67b04a68b881fa51a5cb9ed9476f30fe5b3b4d22
8067247: Crash: assert(method_holder->data() == 0 ...) failed: a) MT-unsafe modification of inline cache
Summary: Made invoker LambdaForm instance & its compiled form lifetime tightly coupled.
Reviewed-by: vlivanov

diff -r 67b04a68b881 -r 9989add27bf4 hotspot/src/share/vm/code/codeCache.cpp
--- a/hotspot/src/share/vm/code/codeCache.cpp	Sun Apr 03 21:44:54 2016 -0700
+++ b/hotspot/src/share/vm/code/codeCache.cpp	Tue Apr 05 01:46:40 2016 -0700
@@ -1042,6 +1042,14 @@
   }
 }
 
+void CodeCache::cleanup_inline_caches() {
+  assert_locked_or_safepoint(CodeCache_lock);
+  NMethodIterator iter;
+  while(iter.next_alive()) {
+    iter.method()->cleanup_inline_caches(/*clean_all=*/true);
+  }
+}
+
 // Keeps track of time spent for checking dependencies
 NOT_PRODUCT(static elapsedTimer dependentCheckTime;)
 
diff -r 67b04a68b881 -r 9989add27bf4 hotspot/src/share/vm/code/codeCache.hpp
--- a/hotspot/src/share/vm/code/codeCache.hpp	Sun Apr 03 21:44:54 2016 -0700
+++ b/hotspot/src/share/vm/code/codeCache.hpp	Tue Apr 05 01:46:40 2016 -0700
@@ -201,6 +201,7 @@
   static bool needs_cache_clean()                     { return _needs_cache_clean; }
   static void set_needs_cache_clean(bool v)           { _needs_cache_clean = v;    }
   static void clear_inline_caches();                  // clear all inline caches
+  static void cleanup_inline_caches();
 
   // Returns true if an own CodeHeap for the given CodeBlobType is available
   static bool heap_available(int code_blob_type);
diff -r 67b04a68b881 -r 9989add27bf4 hotspot/src/share/vm/code/nmethod.cpp
--- a/hotspot/src/share/vm/code/nmethod.cpp	Sun Apr 03 21:44:54 2016 -0700
+++ b/hotspot/src/share/vm/code/nmethod.cpp	Tue Apr 05 01:46:40 2016 -0700
@@ -1138,8 +1138,7 @@
   }
 }
 
-
-void nmethod::cleanup_inline_caches() {
+void nmethod::cleanup_inline_caches(bool clean_all/*=false*/) {
   assert_locked_or_safepoint(CompiledIC_lock);
 
   // If the method is not entrant or zombie then a JMP is plastered over the
@@ -1169,7 +1168,7 @@
         if( cb != NULL && cb->is_nmethod() ) {
           nmethod* nm = (nmethod*)cb;
           // Clean inline caches pointing to zombie, non-entrant and unloaded methods
-          if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(is_alive());
+          if (clean_all || !nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(is_alive());
         }
         break;
       }
@@ -1179,7 +1178,7 @@
         if( cb != NULL && cb->is_nmethod() ) {
           nmethod* nm = (nmethod*)cb;
           // Clean inline caches pointing to zombie, non-entrant and unloaded methods
-          if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean();
+          if (clean_all || !nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean();
         }
         break;
       }
diff -r 67b04a68b881 -r 9989add27bf4 hotspot/src/share/vm/code/nmethod.hpp
--- a/hotspot/src/share/vm/code/nmethod.hpp	Sun Apr 03 21:44:54 2016 -0700
+++ b/hotspot/src/share/vm/code/nmethod.hpp	Tue Apr 05 01:46:40 2016 -0700
@@ -599,7 +599,7 @@
   // Inline cache support
   void clear_inline_caches();
   void clear_ic_stubs();
-  void cleanup_inline_caches();
+  void cleanup_inline_caches(bool clean_all = false);
   bool inlinecache_check_contains(address addr) const {
     return (addr >= code_begin() && addr < verified_entry_point());
   }
diff -r 67b04a68b881 -r 9989add27bf4 hotspot/src/share/vm/prims/whitebox.cpp
--- a/hotspot/src/share/vm/prims/whitebox.cpp	Sun Apr 03 21:44:54 2016 -0700
+++ b/hotspot/src/share/vm/prims/whitebox.cpp	Tue Apr 05 01:46:40 2016 -0700
@@ -1376,8 +1376,8 @@
   return ConstantPool::encode_invokedynamic_index(index);
 WB_END
 
-WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb))
-  VM_ClearICs clear_ics;
+WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
+  VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
   VMThread::execute(&clear_ics);
 WB_END
 
@@ -1757,7 +1757,7 @@
   {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
   {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
-  {CC"clearInlineCaches",  CC"()V",                   (void*)&WB_ClearInlineCaches },
+  {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
                                                       (void*)&WB_AddCompilerDirective },
   {CC"removeCompilerDirective", CC"(I)V",             (void*)&WB_RemoveCompilerDirective },
diff -r 67b04a68b881 -r 9989add27bf4 hotspot/src/share/vm/runtime/vm_operations.cpp
--- a/hotspot/src/share/vm/runtime/vm_operations.cpp	Sun Apr 03 21:44:54 2016 -0700
+++ b/hotspot/src/share/vm/runtime/vm_operations.cpp	Tue Apr 05 01:46:40 2016 -0700
@@ -105,6 +105,14 @@
   }
 }
 
+void VM_ClearICs::doit() {
+  if (_preserve_static_stubs) {
+    CodeCache::cleanup_inline_caches();
+  } else {
+    CodeCache::clear_inline_caches();
+  }
+}
+
 void VM_Deoptimize::doit() {
   // We do not want any GCs to happen while we are in the middle of this VM operation
   ResourceMark rm;
diff -r 67b04a68b881 -r 9989add27bf4 hotspot/src/share/vm/runtime/vm_operations.hpp
--- a/hotspot/src/share/vm/runtime/vm_operations.hpp	Sun Apr 03 21:44:54 2016 -0700
+++ b/hotspot/src/share/vm/runtime/vm_operations.hpp	Tue Apr 05 01:46:40 2016 -0700
@@ -231,9 +231,11 @@
 };
 
 class VM_ClearICs: public VM_Operation {
+ private:
+  bool _preserve_static_stubs;
  public:
-  VM_ClearICs() {}
-  void doit()         { CodeCache::clear_inline_caches(); }
+  VM_ClearICs(bool preserve_static_stubs) { _preserve_static_stubs = preserve_static_stubs; }
+  void doit();
   VMOp_Type type() const { return VMOp_ClearICs; }
 };
 
diff -r 67b04a68b881 -r 9989add27bf4 hotspot/test/compiler/jsr292/InvokerGC.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/jsr292/InvokerGC.java	Tue Apr 05 01:46:40 2016 -0700
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8067247
+ * @library /test/lib /compiler/whitebox /
+ * @run main/bootclasspath -Xcomp -Xbatch
+ *      -XX:CompileCommand=compileonly,InvokerGC::test
+ *      -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
+ *      InvokerGC
+ */
+
+import java.lang.invoke.*;
+import sun.hotspot.WhiteBox;
+
+public class InvokerGC {
+    static final WhiteBox WB = WhiteBox.getWhiteBox();
+
+    static MethodHandle mh;
+    static {
+        try {
+            mh = MethodHandles.lookup().findStatic(InvokerGC.class, "dummy", MethodType.methodType(void.class));
+        } catch (Exception e) {
+            throw new Error(e);
+        }
+    }
+
+    static void dummy() {}
+
+    static void test() {
+        try {
+            mh.invoke();
+        } catch (Throwable e) {
+            throw new Error(e);
+        }
+    }
+
+    public static void main(String[] args) throws Throwable {
+        mh.invoke(); // Pre-generate an invoker for ()V signature
+
+        test(); // trigger method compilation
+        test();
+
+        WB.fullGC(); // WB.fullGC has always clear softref policy.
+
+        test();
+
+        WB.clearInlineCaches(true); // Preserve static stubs.
+
+        test(); // Trigger call site re-resolution. Invoker LambdaForm should stay the same.
+
+        System.out.println("TEST PASSED");
+    }
+}