Mercurial > hg > graal-compiler
view test/compiler/6880034/Test6880034.java @ 9201:59db04ec1598
Change method signature of createInvokeNode method from MethodCallTargetNode to CallTargetNode.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 17 Apr 2013 23:16:50 +0200 |
parents | c18cbe5936b8 |
children |
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/* * Copyright 2009 SAP AG. 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 6880034 * @summary SIGBUS during deoptimisation at a safepoint on 64bit-SPARC * * @run main/othervm -Xcomp -Xbatch -XX:CompileCommand=compileonly,Test6880034,deopt_compiledframe_at_safepoint -XX:+PrintCompilation Test6880034 */ // This test provokes a deoptimisation at a safepoint. // // It achieves this by compiling the method 'deopt_compiledframe_at_safepoint' // before its first usage at a point in time when a call to the virtual method // A::doSomething() from within 'deopt_compiledframe_at_safepoint' can be // optimised to a static call because class A has no descendants. // // Later, when deopt_compiledframe_at_safepoint() is running, class B which // extends A and overrides the virtual method "doSomething()", is loaded // asynchronously in another thread. This makes the compiled code of // 'deopt_compiledframe_at_safepoint' invalid and triggers a deoptimisation of // the frame where 'deopt_compiledframe_at_safepoint' is running in a // loop. // // The deoptimisation leads to a SIGBUS on 64-bit server VMs on SPARC and to // an incorrect result on 32-bit server VMs on SPARC due to a regression // introduced by the change: "6420645: Create a vm that uses compressed oops // for up to 32gb heapsizes" // (http://hg.openjdk.java.net/jdk7/jdk7/hotspot/rev/ba764ed4b6f2). Further // investigation showed that change 6420645 is not really the root cause of // this error but only reveals a problem with the float register encodings in // sparc.ad which was hidden until now. // // Notice that for this test to fail in jtreg it is crucial that // deopt_compiledframe_at_safepoint() runs in the main thread. Otherwise a // crash in deopt_compiledframe_at_safepoint() will not be detected as a test // failure by jtreg. // // Author: Volker H. Simonis class A { public int doSomething() { return 0; } } class B extends A { public B() {} // override 'A::doSomething()' public int doSomething() { return 1; } } class G { public static volatile A a = new A(); // Change 'a' to point to a 'B' object public static void setAtoB() { try { a = (A) ClassLoader. getSystemClassLoader(). loadClass("B"). getConstructor(new Class[] {}). newInstance(new Object[] {}); } catch (Exception e) { System.out.println(e); } } } public class Test6880034 { public static volatile boolean is_in_loop = false; public static volatile boolean stop_while_loop = false; public static double deopt_compiledframe_at_safepoint() { // This will be an optimised static call to A::doSomething() until we load "B" int i = G.a.doSomething(); // Need more than 16 'double' locals in this frame double local1 = 1; double local2 = 2; double local3 = 3; double local4 = 4; double local5 = 5; double local6 = 6; double local7 = 7; double local8 = 8; long k = 0; // Once we load "B", this method will be made 'not entrant' and deoptimised // at the safepoint which is at the end of this loop. while (!stop_while_loop) { if (k == 1) local1 += i; if (k == 2) local2 += i; if (k == 3) local3 += i; if (k == 4) local4 += i; if (k == 5) local5 += i; if (k == 6) local6 += i; if (k == 7) local7 += i; if (k == 8) local8 += i; // Tell the world that we're now running wild in the loop if (k++ == 20000) is_in_loop = true; } return local1 + local2 + local3 + local4 + local5 + local6 + local7 + local8 + i; } public static void main(String[] args) { // Just to resolve G before we compile deopt_compiledframe_at_safepoint() G g = new G(); // Asynchronous thread which will eventually invalidate the code for // deopt_compiledframe_at_safepoint() and therefore triggering a // deoptimisation of that method. new Thread() { public void run() { while (!is_in_loop) { // Wait until the loop is running } // Load class 'B' asynchronously.. G.setAtoB(); // ..and stop the loop stop_while_loop = true; } }.start(); // Run the loop in deopt_compiledframe_at_safepoint() double retVal = deopt_compiledframe_at_safepoint(); System.out.println(retVal == 36 ? "OK" : "ERROR : " + retVal); if (retVal != 36) throw new RuntimeException(); } }