1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
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  23 
  24 /**
  25  * @test Level2RecompilationTest
  26  * @summary Test downgrading mechanism from level 3 to level 2 for those profiled methods.
  27  * @library /testlibrary /testlibrary/whitebox /compiler/whitebox
  28  * @build Level2RecompilationTest
  29  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  30  * @run main/othervm -Xbootclasspath/a:. -XX:+TieredCompilation
  31  *                   -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:-UseCounterDecay
  32  *                   -XX:CompileCommand=compileonly,SimpleTestCase$Helper::*
  33  *                   -XX:CompileCommand=print,SimpleTestCase$Helper::*
  34  *                   Level2RecompilationTest
  35  */
  36 public class Level2RecompilationTest extends CompLevelsTest {
  37     public static void main(String[] args) throws Throwable {
  38         if (CompilerWhiteBoxTest.skipOnTieredCompilation(false)) {
  39             throw new RuntimeException("Test isn't applicable for non-tiered mode");
  40         }
  41         String[] testcases = {"METHOD_TEST", "OSR_STATIC_TEST"};
  42         CompilerWhiteBoxTest.main(Level2RecompilationTest::new, testcases);
  43     }
  44 
  45     protected Level2RecompilationTest(TestCase testCase) {
  46         super(testCase);
  47         // to prevent inlining of #method
  48         WHITE_BOX.testSetDontInlineMethod(method, true);
  49     }
  50 
  51     @Override
  52     protected void test() throws Exception {
  53         if (skipXcompOSR()) {
  54           return;
  55         }
  56 
  57         checkNotCompiled();
  58         int bci = WHITE_BOX.getMethodEntryBci(method);
  59         WHITE_BOX.markMethodProfiled(method);
  60         if (testCase.isOsr()) {
  61             // for OSR compilation, it must be the begin of a BB.
  62             // c1_GraphBulider.cpp:153  assert(method()->bci_block_start().at(cur_bci), ...
  63             bci = 0;
  64         }
  65 
  66         WHITE_BOX.enqueueMethodForCompilation(method, COMP_LEVEL_FULL_PROFILE, bci);
  67         checkCompiled();
  68         checkLevel(COMP_LEVEL_LIMITED_PROFILE, getCompLevel());
  69 
  70         for (int i=0; i<100; ++i) {
  71             WHITE_BOX.enqueueMethodForCompilation(method, COMP_LEVEL_FULL_PROFILE, bci);
  72             waitBackgroundCompilation();
  73             checkLevel(COMP_LEVEL_LIMITED_PROFILE, getCompLevel());
  74         }
  75     }
  76 
  77     @Override
  78     protected void checkLevel(int expected, int actual) {
  79         if (expected == COMP_LEVEL_FULL_PROFILE
  80                 && actual == COMP_LEVEL_LIMITED_PROFILE) {
  81             // for simple method full_profile may be replaced by limited_profile
  82             if (IS_VERBOSE) {
  83                 System.out.printf("Level check: full profiling was replaced "
  84                         + "by limited profiling. Expected: %d, actual:%d\n",
  85                         expected, actual);
  86             }
  87             return;
  88         }
  89         super.checkLevel(expected, actual);
  90     }
  91 }
  92