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java-1_8_0-openjdk/8038636.patch

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--- icedtea-3.8.0/openjdk/hotspot/src/share/vm/oops/instanceKlass.cpp 2018-09-18 09:01:41.412881903 +0200
+++ icedtea-3.8.0/openjdk/hotspot/src/share/vm/oops/instanceKlass.cpp 2018-09-18 09:03:51.077559026 +0200
@@ -3699,6 +3699,10 @@
("purge: %s(%s): prev method @%d in version @%d is alive",
method->name()->as_C_string(),
method->signature()->as_C_string(), j, i));
+ if (method->method_data() != NULL) {
+ // Clean out any weak method links
+ method->method_data()->clean_weak_method_links();
+ }
}
}
}
@@ -3708,6 +3712,14 @@
("purge: previous version stats: live=%d, deleted=%d", live_count,
deleted_count));
}
+
+ Array<Method*>* methods = ik->methods();
+ int num_methods = methods->length();
+ for (int index2 = 0; index2 < num_methods; ++index2) {
+ if (methods->at(index2)->method_data() != NULL) {
+ methods->at(index2)->method_data()->clean_weak_method_links();
+ }
+ }
}
// External interface for use during class unloading.
--- icedtea-3.8.0/openjdk/hotspot/src/share/vm/oops/methodData.cpp 2018-09-18 09:01:41.412881903 +0200
+++ icedtea-3.8.0/openjdk/hotspot/src/share/vm/oops/methodData.cpp 2018-09-18 09:03:51.077559026 +0200
@@ -1559,9 +1559,35 @@
}
}
-// Remove SpeculativeTrapData entries that reference an unloaded
-// method
-void MethodData::clean_extra_data(BoolObjectClosure* is_alive) {
+class CleanExtraDataClosure : public StackObj {
+public:
+ virtual bool is_live(Method* m) = 0;
+};
+
+// Check for entries that reference an unloaded method
+class CleanExtraDataKlassClosure : public CleanExtraDataClosure {
+private:
+ BoolObjectClosure* _is_alive;
+public:
+ CleanExtraDataKlassClosure(BoolObjectClosure* is_alive) : _is_alive(is_alive) {}
+ bool is_live(Method* m) {
+ return m->method_holder()->is_loader_alive(_is_alive);
+ }
+};
+
+// Check for entries that reference a redefined method
+class CleanExtraDataMethodClosure : public CleanExtraDataClosure {
+public:
+ CleanExtraDataMethodClosure() {}
+ bool is_live(Method* m) {
+ return m->on_stack();
+ }
+};
+
+
+// Remove SpeculativeTrapData entries that reference an unloaded or
+// redefined method
+void MethodData::clean_extra_data(CleanExtraDataClosure* cl) {
DataLayout* dp = extra_data_base();
DataLayout* end = extra_data_limit();
@@ -1572,7 +1598,7 @@
SpeculativeTrapData* data = new SpeculativeTrapData(dp);
Method* m = data->method();
assert(m != NULL, "should have a method");
- if (!m->method_holder()->is_loader_alive(is_alive)) {
+ if (!cl->is_live(m)) {
// "shift" accumulates the number of cells for dead
// SpeculativeTrapData entries that have been seen so
// far. Following entries must be shifted left by that many
@@ -1603,9 +1629,9 @@
}
}
-// Verify there's no unloaded method referenced by a
+// Verify there's no unloaded or redefined method referenced by a
// SpeculativeTrapData entry
-void MethodData::verify_extra_data_clean(BoolObjectClosure* is_alive) {
+void MethodData::verify_extra_data_clean(CleanExtraDataClosure* cl) {
#ifdef ASSERT
DataLayout* dp = extra_data_base();
DataLayout* end = extra_data_limit();
@@ -1615,7 +1641,7 @@
case DataLayout::speculative_trap_data_tag: {
SpeculativeTrapData* data = new SpeculativeTrapData(dp);
Method* m = data->method();
- assert(m != NULL && m->method_holder()->is_loader_alive(is_alive), "Method should exist");
+ assert(m != NULL && cl->is_live(m), "Method should exist");
break;
}
case DataLayout::bit_data_tag:
@@ -1641,6 +1667,19 @@
parameters->clean_weak_klass_links(is_alive);
}
- clean_extra_data(is_alive);
- verify_extra_data_clean(is_alive);
+ CleanExtraDataKlassClosure cl(is_alive);
+ clean_extra_data(&cl);
+ verify_extra_data_clean(&cl);
+}
+
+void MethodData::clean_weak_method_links() {
+ for (ProfileData* data = first_data();
+ is_valid(data);
+ data = next_data(data)) {
+ data->clean_weak_method_links();
+ }
+
+ CleanExtraDataMethodClosure cl;
+ clean_extra_data(&cl);
+ verify_extra_data_clean(&cl);
}
--- icedtea-3.8.0/openjdk/hotspot/src/share/vm/oops/methodData.hpp 2018-09-18 09:01:41.412881903 +0200
+++ icedtea-3.8.0/openjdk/hotspot/src/share/vm/oops/methodData.hpp 2018-09-18 09:03:51.077559026 +0200
@@ -251,6 +251,9 @@
// GC support
void clean_weak_klass_links(BoolObjectClosure* cl);
+
+ // Redefinition support
+ void clean_weak_method_links();
};
@@ -508,6 +511,9 @@
// GC support
virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {}
+ // Redefinition support
+ virtual void clean_weak_method_links() {}
+
// CI translation: ProfileData can represent both MethodDataOop data
// as well as CIMethodData data. This function is provided for translating
// an oop in a ProfileData to the ci equivalent. Generally speaking,
@@ -2030,6 +2036,7 @@
//
CC_INTERP_ONLY(class BytecodeInterpreter;)
+class CleanExtraDataClosure;
class MethodData : public Metadata {
friend class VMStructs;
@@ -2183,9 +2190,9 @@
static bool profile_parameters_jsr292_only();
static bool profile_all_parameters();
- void clean_extra_data(BoolObjectClosure* is_alive);
+ void clean_extra_data(CleanExtraDataClosure* cl);
void clean_extra_data_helper(DataLayout* dp, int shift, bool reset = false);
- void verify_extra_data_clean(BoolObjectClosure* is_alive);
+ void verify_extra_data_clean(CleanExtraDataClosure* cl);
public:
static int header_size() {
@@ -2477,6 +2484,8 @@
static bool profile_return_jsr292_only();
void clean_method_data(BoolObjectClosure* is_alive);
+
+ void clean_weak_method_links();
};
#endif // SHARE_VM_OOPS_METHODDATAOOP_HPP
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ icedtea-3.8.0/openjdk/hotspot/test/compiler/profiling/spectrapredefineclass/Agent.java Tue Apr 08 09:51:25 2014 +0200
@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 2014, 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.
+ */
+
+import java.security.*;
+import java.lang.instrument.*;
+import java.lang.reflect.*;
+import java.lang.management.ManagementFactory;
+import com.sun.tools.attach.VirtualMachine;
+
+class A {
+ void m() {
+ }
+}
+
+class B extends A {
+ void m() {
+ }
+}
+
+class C extends A {
+ void m() {
+ }
+}
+
+class Test {
+
+ static public void m() throws Exception {
+ for (int i = 0; i < 20000; i++) {
+ m1(a);
+ }
+ for (int i = 0; i < 4; i++) {
+ m1(b);
+ }
+ }
+
+ static boolean m1(A a) {
+ boolean res = Agent.m2(a);
+ return res;
+ }
+
+ static public A a = new A();
+ static public B b = new B();
+ static public C c = new C();
+}
+
+public class Agent implements ClassFileTransformer {
+
+
+ static class MemoryChunk {
+ MemoryChunk other;
+ long[] array;
+ MemoryChunk(MemoryChunk other) {
+ other = other;
+ array = new long[1024 * 1024 * 1024];
+ }
+ }
+
+ static public boolean m2(A a) {
+ boolean res = false;
+ if (a.getClass() == B.class) {
+ a.m();
+ } else {
+ res = true;
+ }
+ return res;
+ }
+
+ static public void main(String[] args) throws Exception {
+ // Create speculative trap entries
+ Test.m();
+
+ String nameOfRunningVM = ManagementFactory.getRuntimeMXBean().getName();
+ int p = nameOfRunningVM.indexOf('@');
+ String pid = nameOfRunningVM.substring(0, p);
+
+ // Make the nmethod go away
+ for (int i = 0; i < 10; i++) {
+ System.gc();
+ }
+
+ // Redefine class
+ try {
+ VirtualMachine vm = VirtualMachine.attach(pid);
+ vm.loadAgent(System.getProperty("test.classes",".") + "/agent.jar", "");
+ vm.detach();
+ } catch (Exception e) {
+ throw new RuntimeException(e);
+ }
+
+ Test.m();
+ // GC will hit dead method pointer
+ for (int i = 0; i < 10; i++) {
+ System.gc();
+ }
+ }
+
+ public synchronized byte[] transform(final ClassLoader classLoader,
+ final String className,
+ Class<?> classBeingRedefined,
+ ProtectionDomain protectionDomain,
+ byte[] classfileBuffer) {
+ System.out.println("Transforming class " + className);
+ return classfileBuffer;
+ }
+
+ public static void redefine(String agentArgs, Instrumentation instrumentation, Class to_redefine) {
+
+ try {
+ instrumentation.retransformClasses(to_redefine);
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ }
+
+ public static void agentmain(String agentArgs, Instrumentation instrumentation) throws Exception {
+ Agent transformer = new Agent();
+ instrumentation.addTransformer(transformer, true);
+
+ redefine(agentArgs, instrumentation, Test.class);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ icedtea-3.8.0/openjdk/hotspot/test/compiler/profiling/spectrapredefineclass/Launcher.java Tue Apr 08 09:51:25 2014 +0200
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2014, 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.
+ */
+import java.io.PrintWriter;
+import com.oracle.java.testlibrary.*;
+
+/*
+ * @test
+ * @bug 8038636
+ * @library /testlibrary
+ * @build Agent
+ * @run main ClassFileInstaller Agent
+ * @run main Launcher
+ * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:TypeProfileLevel=222 -Xmx1M -XX:ReservedCodeCacheSize=3M Agent
+ */
+public class Launcher {
+ public static void main(String[] args) throws Exception {
+
+ PrintWriter pw = new PrintWriter("MANIFEST.MF");
+ pw.println("Agent-Class: Agent");
+ pw.println("Can-Retransform-Classes: true");
+ pw.close();
+
+ ProcessBuilder pb = new ProcessBuilder();
+ pb.command(new String[] { JDKToolFinder.getJDKTool("jar"), "cmf", "MANIFEST.MF", System.getProperty("test.classes",".") + "/agent.jar", "Agent.class"});
+ pb.start().waitFor();
+ }
+}
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