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src/hotspot/share/gc/shared/gcArguments.cpp

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rev 48019 : 8191821: Finer granularity for GC verification
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   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 "gc/shared/gcArguments.hpp"
  27 #include "gc/serial/serialArguments.hpp"

  28 #include "memory/allocation.inline.hpp"
  29 #include "runtime/arguments.hpp"
  30 #include "runtime/globals.hpp"
  31 #include "runtime/globals_extension.hpp"
  32 #include "runtime/java.hpp"
  33 #include "runtime/os.hpp"
  34 #include "utilities/defaultStream.hpp"
  35 #include "utilities/macros.hpp"
  36 
  37 #if INCLUDE_ALL_GCS
  38 #include "gc/parallel/parallelArguments.hpp"
  39 #include "gc/cms/cmsArguments.hpp"
  40 #include "gc/g1/g1Arguments.hpp"
  41 #endif
  42 
  43 GCArguments* GCArguments::_instance = NULL;
  44 
  45 GCArguments* GCArguments::arguments() {
  46   assert(is_initialized(), "Heap factory not yet created");
  47   return _instance;


  67     }
  68   }
  69 }
  70 
  71 void GCArguments::select_gc_ergonomically() {
  72 #if INCLUDE_ALL_GCS
  73   if (os::is_server_class_machine()) {
  74     FLAG_SET_ERGO_IF_DEFAULT(bool, UseG1GC, true);
  75   } else {
  76     FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true);
  77   }
  78 #else
  79   UNSUPPORTED_OPTION(UseG1GC);
  80   UNSUPPORTED_OPTION(UseParallelGC);
  81   UNSUPPORTED_OPTION(UseParallelOldGC);
  82   UNSUPPORTED_OPTION(UseConcMarkSweepGC);
  83   FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true);
  84 #endif // INCLUDE_ALL_GCS
  85 }
  86 




  87 void GCArguments::initialize_flags() {
  88 #if INCLUDE_ALL_GCS
  89   if (MinHeapFreeRatio == 100) {
  90     // Keeping the heap 100% free is hard ;-) so limit it to 99%.
  91     FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
  92   }
  93 
  94   // If class unloading is disabled, also disable concurrent class unloading.
  95   if (!ClassUnloading) {
  96     FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
  97     FLAG_SET_CMDLINE(bool, ClassUnloadingWithConcurrentMark, false);
  98   }
  99 #endif // INCLUDE_ALL_GCS















 100 }
 101 
 102 jint GCArguments::initialize() {
 103   assert(!is_initialized(), "GC arguments already initialized");
 104 
 105   select_gc();
 106 
 107 #if !INCLUDE_ALL_GCS
 108   if (UseParallelGC || UseParallelOldGC) {
 109     jio_fprintf(defaultStream::error_stream(), "UseParallelGC not supported in this VM.\n");
 110     return JNI_ERR;
 111   } else if (UseG1GC) {
 112     jio_fprintf(defaultStream::error_stream(), "UseG1GC not supported in this VM.\n");
 113     return JNI_ERR;
 114   } else if (UseConcMarkSweepGC) {
 115     jio_fprintf(defaultStream::error_stream(), "UseConcMarkSweepGC not supported in this VM.\n");
 116     return JNI_ERR;
 117 #else
 118   if (UseParallelGC || UseParallelOldGC) {
 119     _instance = new ParallelArguments();


   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 "gc/shared/gcArguments.hpp"
  27 #include "gc/serial/serialArguments.hpp"
  28 #include "logging/log.hpp"
  29 #include "memory/allocation.inline.hpp"
  30 #include "runtime/arguments.hpp"
  31 #include "runtime/globals.hpp"
  32 #include "runtime/globals_extension.hpp"
  33 #include "runtime/java.hpp"
  34 #include "runtime/os.hpp"
  35 #include "utilities/defaultStream.hpp"
  36 #include "utilities/macros.hpp"
  37 
  38 #if INCLUDE_ALL_GCS
  39 #include "gc/parallel/parallelArguments.hpp"
  40 #include "gc/cms/cmsArguments.hpp"
  41 #include "gc/g1/g1Arguments.hpp"
  42 #endif
  43 
  44 GCArguments* GCArguments::_instance = NULL;
  45 
  46 GCArguments* GCArguments::arguments() {
  47   assert(is_initialized(), "Heap factory not yet created");
  48   return _instance;


  68     }
  69   }
  70 }
  71 
  72 void GCArguments::select_gc_ergonomically() {
  73 #if INCLUDE_ALL_GCS
  74   if (os::is_server_class_machine()) {
  75     FLAG_SET_ERGO_IF_DEFAULT(bool, UseG1GC, true);
  76   } else {
  77     FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true);
  78   }
  79 #else
  80   UNSUPPORTED_OPTION(UseG1GC);
  81   UNSUPPORTED_OPTION(UseParallelGC);
  82   UNSUPPORTED_OPTION(UseParallelOldGC);
  83   UNSUPPORTED_OPTION(UseConcMarkSweepGC);
  84   FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true);
  85 #endif // INCLUDE_ALL_GCS
  86 }
  87 
  88 void GCArguments::parse_verification_type(const char* type) {
  89   log_warning(gc, verify)("VerifyGCType is not supported by this collector.");
  90 }
  91 
  92 void GCArguments::initialize_flags() {
  93 #if INCLUDE_ALL_GCS
  94   if (MinHeapFreeRatio == 100) {
  95     // Keeping the heap 100% free is hard ;-) so limit it to 99%.
  96     FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
  97   }
  98 
  99   // If class unloading is disabled, also disable concurrent class unloading.
 100   if (!ClassUnloading) {
 101     FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
 102     FLAG_SET_CMDLINE(bool, ClassUnloadingWithConcurrentMark, false);
 103   }
 104 #endif // INCLUDE_ALL_GCS
 105 }
 106 
 107 void GCArguments::post_heap_initialize() {
 108   if (strlen(VerifyGCType) > 0) {
 109     const char delimiter[] = " ,\n";
 110     size_t length = strlen(VerifyGCType);
 111     char* type_list = NEW_C_HEAP_ARRAY(char, length + 1, mtInternal);
 112     strncpy(type_list, VerifyGCType, length + 1);
 113     char* token = strtok(type_list, delimiter);
 114     while (token != NULL) {
 115       parse_verification_type(token);
 116       token = strtok(NULL, delimiter);
 117     }
 118     FREE_C_HEAP_ARRAY(char, type_list);
 119   }
 120 }
 121 
 122 jint GCArguments::initialize() {
 123   assert(!is_initialized(), "GC arguments already initialized");
 124 
 125   select_gc();
 126 
 127 #if !INCLUDE_ALL_GCS
 128   if (UseParallelGC || UseParallelOldGC) {
 129     jio_fprintf(defaultStream::error_stream(), "UseParallelGC not supported in this VM.\n");
 130     return JNI_ERR;
 131   } else if (UseG1GC) {
 132     jio_fprintf(defaultStream::error_stream(), "UseG1GC not supported in this VM.\n");
 133     return JNI_ERR;
 134   } else if (UseConcMarkSweepGC) {
 135     jio_fprintf(defaultStream::error_stream(), "UseConcMarkSweepGC not supported in this VM.\n");
 136     return JNI_ERR;
 137 #else
 138   if (UseParallelGC || UseParallelOldGC) {
 139     _instance = new ParallelArguments();
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