1 /*

     2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     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.

    22  *

    23  */

    24 

    25 #include "precompiled.hpp"

    26 #include "classfile/systemDictionary.hpp"

    27 #include "gc/shared/weakProcessorPhases.hpp"

    28 #include "runtime/jniHandles.hpp"

    29 #include "utilities/debug.hpp"

    30 #include "utilities/macros.hpp"

    31 

    32 #if INCLUDE_JFR

    33 #include "jfr/jfr.hpp"

    34 #endif // INCLUDE_JFR

    35 

    36 #if INCLUDE_JVMTI

    37 #include "prims/jvmtiExport.hpp"

    38 #endif // INCLUDE_JVMTI

    39 

    40 WeakProcessorPhases::Phase WeakProcessorPhases::phase(uint value) {

    41   assert(value < phase_count, "Invalid phase value %u", value);

    42   return static_cast<Phase>(value);

    43 }

    44 

    45 uint WeakProcessorPhases::index(Phase phase) {

    46   uint value = static_cast<uint>(phase);

    47   assert(value < phase_count, "Invalid phase %u", value);

    48   return value;

    49 }

    50 

    51 uint WeakProcessorPhases::serial_index(Phase phase) {

    52   assert(is_serial(phase), "not serial phase %u", index(phase));

    53   return index(phase) - serial_phase_start;

    54 }

    55 

    56 uint WeakProcessorPhases::oop_storage_index(Phase phase) {

    57   assert(is_oop_storage(phase), "not oop storage phase %u", index(phase));

    58   return index(phase) - oop_storage_phase_start;

    59 }

    60 

    61 bool WeakProcessorPhases::is_serial(Phase phase) {

    62   return (index(phase) - serial_phase_start) < serial_phase_count;

    63 }

    64 

    65 bool WeakProcessorPhases::is_oop_storage(Phase phase) {

    66   return (index(phase) - oop_storage_phase_start) < oop_storage_phase_count;

    67 }

    68 

    69 const char* WeakProcessorPhases::description(Phase phase) {

    70   switch (phase) {

    71   JVMTI_ONLY(case jvmti: return "JVMTI weak processing";)

    72   JFR_ONLY(case jfr: return "JFR weak processing";)

    73   case jni: return "JNI weak processing";

    74   case vm: return "VM weak processing";

    75   default:

    76     ShouldNotReachHere();

    77     return "Invalid weak processing phase";

    78   }

    79 }

    80 

    81 WeakProcessorPhases::Processor WeakProcessorPhases::processor(Phase phase) {

    82   switch (phase) {

    83   JVMTI_ONLY(case jvmti: return &JvmtiExport::weak_oops_do;)

    84   JFR_ONLY(case jfr: return &Jfr::weak_oops_do;)

    85   default:

    86     ShouldNotReachHere();

    87     return NULL;

    88   }

    89 }

    90 

    91 OopStorage* WeakProcessorPhases::oop_storage(Phase phase) {

    92   switch (phase) {

    93   case jni: return JNIHandles::weak_global_handles();

    94   case vm: return SystemDictionary::vm_weak_oop_storage();

    95   default:

    96     ShouldNotReachHere();

    97     return NULL;

    98   }

    99 }