view src/share/vm/prims/whitebox.cpp @ 5761:b86041bd7b99

8010722: assert: failed: heap size is too big for compressed oops Summary: Use conservative assumptions of required alignment for the various garbage collector components into account when determining the maximum heap size that supports compressed oops. Using this conservative value avoids several circular dependencies in the calculation. Reviewed-by: stefank, dholmes
author tschatzl
date Tue, 18 Apr 2017 06:37:32 +0100
parents 2b734e53d73b
children
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/*
 * Copyright (c) 2012, 2015, 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.
 *
 */

#include "precompiled.hpp"

#include "memory/universe.hpp"
#include "oops/oop.inline.hpp"

#include "code/codeCache.hpp"

#include "classfile/symbolTable.hpp"

#include "prims/whitebox.hpp"
#include "prims/wbtestmethods/parserTests.hpp"

#include "runtime/arguments.hpp"
#include "runtime/interfaceSupport.hpp"
#include "runtime/os.hpp"
#include "utilities/debug.hpp"

#ifndef SERIALGC
#include "gc_implementation/g1/concurrentMark.hpp"
#include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
#include "gc_implementation/g1/heapRegionRemSet.hpp"
#endif // !SERIALGC

#include "services/memTracker.hpp"

bool WhiteBox::_used = false;

WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  return (jlong)(void*)JNIHandles::resolve(obj);
WB_END

WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  return heapOopSize;
WB_END

WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
  return (jlong)Arguments::max_heap_for_compressed_oops();
}
WB_END

WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
  CollectorPolicy * p = Universe::heap()->collector_policy();
  gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
    SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Min alignment "SIZE_FORMAT" Max alignment "SIZE_FORMAT,
    p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
    p->min_alignment(), p->max_alignment());
}
WB_END

#ifndef SERIALGC
WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
  G1CollectedHeap* g1 = G1CollectedHeap::heap();
  oop result = JNIHandles::resolve(obj);
  const HeapRegion* hr = g1->heap_region_containing(result);
  return hr->isHumongous();
WB_END

WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
  G1CollectedHeap* g1 = G1CollectedHeap::heap();
  size_t nr = g1->free_regions();
  return (jlong)nr;
WB_END

WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
  G1CollectedHeap* g1 = G1CollectedHeap::heap();
  ConcurrentMark* cm = g1->concurrent_mark();
  return cm->concurrent_marking_in_progress();
WB_END

WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
  return (jint)HeapRegion::GrainBytes;
WB_END
#endif // !SERIALGC

// Alloc memory using the test memory type so that we can use that to see if
// NMT picks it up correctly
WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
  jlong addr = 0;

  if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) {
    addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
  }

  return addr;
WB_END

// Free the memory allocated by NMTAllocTest
WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
  os::free((void*)(uintptr_t)mem, mtTest);
WB_END

WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
  jlong addr = 0;

  if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) {
    addr = (jlong)(uintptr_t)os::reserve_memory(size);
    MemTracker::record_virtual_memory_type((address)addr, mtTest);
  }

  return addr;
WB_END


WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
  os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
  MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
WB_END

WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
  os::uncommit_memory((char *)(uintptr_t)addr, size);
WB_END

WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
  os::release_memory((char *)(uintptr_t)addr, size);
WB_END

// Block until the current generation of NMT data to be merged, used to reliably test the NMT feature
WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env))

  if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
    return false;
  }

  return MemTracker::wbtest_wait_for_data_merge();
WB_END

WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
  return MemTracker::tracking_level() == MemTracker::NMT_detail;
WB_END

WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
  MutexLockerEx mu(Compile_lock);
  CodeCache::mark_all_nmethods_for_deoptimization();
  VM_Deoptimize op;
  VMThread::execute(&op);
WB_END

//Some convenience methods to deal with objects from java
int WhiteBox::offset_for_field(const char* field_name, oop object,
    Symbol* signature_symbol) {
  assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
  Thread* THREAD = Thread::current();

  //Get the class of our object
  klassOop arg_klass = object->klass();
  //Turn it into an instance-klass
  instanceKlass* ik = instanceKlass::cast(arg_klass);

  //Create symbols to look for in the class
  TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
      THREAD);

  //To be filled in with an offset of the field we're looking for
  fieldDescriptor fd;

  klassOop res = ik->find_field(name_symbol, signature_symbol, &fd);
  if (res == NULL) {
    tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
        name_symbol->as_C_string());
    fatal("Invalid layout of preloaded class");
  }

  //fetch the field at the offset we've found
  int dest_offset = fd.offset();

  return dest_offset;
}


const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
  int offset = offset_for_field(field_name, object,
      vmSymbols::string_signature());
  oop string = object->obj_field(offset);
  if (string == NULL) {
    return NULL;
  }
  const char* ret = java_lang_String::as_utf8_string(string);
  return ret;
}

bool WhiteBox::lookup_bool(const char* field_name, oop object) {
  int offset =
      offset_for_field(field_name, object, vmSymbols::bool_signature());
  bool ret = (object->bool_field(offset) == JNI_TRUE);
  return ret;
}


#define CC (char*)

static JNINativeMethod methods[] = {
  {CC"getObjectAddress",   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
  {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
  {CC "parseCommandLine",
      CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
      (void*) &WB_ParseCommandLine
  },
  {CC"getCompressedOopsMaxHeapSize", CC"()J",
      (void*)&WB_GetCompressedOopsMaxHeapSize},
  {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
#ifndef SERIALGC
  {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
  {CC"g1IsHumongous",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
  {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
  {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
#endif // !SERIALGC
  {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
  {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
  {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
  {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
  {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
  {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
  {CC"NMTWaitForDataMerge", CC"()Z",                  (void*)&WB_NMTWaitForDataMerge},
  {CC"NMTIsDetailSupported",CC"()Z",                  (void*)&WB_NMTIsDetailSupported},
  {CC"deoptimizeAll",       CC"()V",                  (void*)&WB_DeoptimizeAll     },
};

#undef CC

JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
  {
    if (WhiteBoxAPI) {
      // Make sure that wbclass is loaded by the null classloader
      instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
      Handle loader(ikh->class_loader());
      if (loader.is_null()) {
        ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
        jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
        if (result == 0) {
          WhiteBox::set_used();
        }
      }
    }
  }
JVM_END