jdk8-mips64-public/hotspot: src/share/vm/prims/whitebox.cpp@2c6ef90f030a (annotated)

src/share/vm/prims/whitebox.cpp@2c6ef90f030a (annotated)

src/share/vm/prims/whitebox.cpp

Mon, 07 Jul 2014 10:12:40 +0200

author: stefank
date: Mon, 07 Jul 2014 10:12:40 +0200
changeset 6992: 2c6ef90f030a
parent 6963: 0c48231c5c84
child 7050: 6701abbc4441
permissions: -rw-r--r--

8049421: G1 Class Unloading after completing a concurrent mark cycle
Reviewed-by: tschatzl, ehelin, brutisso, coleenp, roland, iveresov
Contributed-by: stefan.karlsson@oracle.com, mikael.gerdin@oracle.com

 /*
  * Copyright (c) 2012, 2014, 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/metadataFactory.hpp"
 #include "memory/universe.hpp"
 #include "oops/oop.inline.hpp"
 #include "classfile/symbolTable.hpp"
 #include "classfile/classLoaderData.hpp"
 #include "prims/whitebox.hpp"
 #include "prims/wbtestmethods/parserTests.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/interfaceSupport.hpp"
 #include "runtime/os.hpp"
 #include "utilities/array.hpp"
 #include "utilities/debug.hpp"
 #include "utilities/macros.hpp"
 #include "utilities/exceptions.hpp"
 #if INCLUDE_ALL_GCS
 #include "gc_implementation/g1/concurrentMark.hpp"
 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
 #include "gc_implementation/g1/heapRegionRemSet.hpp"
 #endif // INCLUDE_ALL_GCS
 #ifdef INCLUDE_NMT
 #include "services/memTracker.hpp"
 #endif // INCLUDE_NMT
 #include "compiler/compileBroker.hpp"
 #include "runtime/compilationPolicy.hpp"
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 #define SIZE_T_MAX_VALUE ((size_t) -1)
 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
 class WBIsKlassAliveClosure : public KlassClosure {
     Symbol* _name;
     bool _found;
 public:
     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
     void do_klass(Klass* k) {
       if (_found) return;
       Symbol* ksym = k->name();
       if (ksym->fast_compare(_name) == 0) {
         _found = true;
       }
     }
     bool found() const {
         return _found;
     }
 };
 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
   Handle h_name = JNIHandles::resolve(name);
   if (h_name.is_null()) return false;
   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
   WBIsKlassAliveClosure closure(sym);
   ClassLoaderDataGraph::classes_do(&closure);
   return closure.found();
 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->space_alignment(), p->heap_alignment());
 }
 WB_END
 #ifndef PRODUCT
 // Forward declaration
 void TestReservedSpace_test();
 void TestReserveMemorySpecial_test();
 void TestVirtualSpace_test();
 void TestMetaspaceAux_test();
 #endif
 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 #ifndef PRODUCT
   TestReservedSpace_test();
   TestReserveMemorySpecial_test();
   TestVirtualSpace_test();
   TestMetaspaceAux_test();
 #endif
 WB_END
 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
   size_t granularity = os::vm_allocation_granularity();
   ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
   VirtualSpace vs;
   vs.initialize(rhs, 50 * granularity);
   //Check if constraints are complied
   if (!( UseCompressedOops && rhs.base() != NULL &&
          Universe::narrow_oop_base() != NULL &&
          Universe::narrow_oop_use_implicit_null_checks() )) {
     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
                   "\tUseCompressedOops is %d\n"
                   "\trhs.base() is "PTR_FORMAT"\n"
                   "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
                   UseCompressedOops,
                   rhs.base(),
                   Universe::narrow_oop_base(),
                   Universe::narrow_oop_use_implicit_null_checks());
     return;
   }
   tty->print_cr("Reading from no access area... ");
   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 WB_END
 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
                                            size_t magnitude, size_t iterations) {
   size_t granularity = os::vm_allocation_granularity();
   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
   VirtualSpace vs;
   if (!vs.initialize(rhs, 0)) {
     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
     return 3;
   }
   long seed = os::random();
   tty->print_cr("Random seed is %ld", seed);
   os::init_random(seed);
   for (size_t i = 0; i < iterations; i++) {
     // Whether we will shrink or grow
     bool shrink = os::random() % 2L == 0;
     // Get random delta to resize virtual space
     size_t delta = (size_t)os::random() % magnitude;
     // If we are about to shrink virtual space below zero, then expand instead
     if (shrink && vs.committed_size() < delta) {
       shrink = false;
     }
     // Resizing by delta
     if (shrink) {
       vs.shrink_by(delta);
     } else {
       // If expanding fails expand_by will silently return false
       vs.expand_by(delta, true);
     }
   }
   return 0;
 }
 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
         jlong reserved_space_size, jlong magnitude, jlong iterations))
   tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
                 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
                 iterations);
   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
     return 1;
   }
   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
   if (sizeof(size_t) < sizeof(jlong)) {
     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
         || iterations > size_t_max_value) {
       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
       return 2;
     }
   }
   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
                                         (size_t) magnitude, (size_t) iterations);
 WB_END
 #if INCLUDE_ALL_GCS
 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 // INCLUDE_ALL_GCS
 #if INCLUDE_NMT
 // 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
 #endif // INCLUDE_NMT
 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
   assert(method != NULL, "method should not be null");
   ThreadToNativeFromVM ttn(thread);
   return env->FromReflectedMethod(method);
 }
 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
 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   int result = 0;
   CHECK_JNI_EXCEPTION_(env, result);
   MutexLockerEx mu(Compile_lock);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   nmethod* code;
   if (is_osr) {
     int bci = InvocationEntryBci;
     while ((code = mh->lookup_osr_nmethod_for(bci, CompLevel_none, false)) != NULL) {
       code->mark_for_deoptimization();
       ++result;
       bci = code->osr_entry_bci() + 1;
     }
   } else {
     code = mh->code();
   }
   if (code != NULL) {
     code->mark_for_deoptimization();
     ++result;
   }
   result += CodeCache::mark_for_deoptimization(mh());
   if (result > 0) {
     VM_Deoptimize op;
     VMThread::execute(&op);
   }
   return result;
 WB_END
 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
   MutexLockerEx mu(Compile_lock);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
   if (code == NULL) {
     return JNI_FALSE;
   }
   return (code->is_alive() && !code->is_marked_for_deoptimization());
 WB_END
 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
   MutexLockerEx mu(Compile_lock);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   if (is_osr) {
     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
   } else {
     return CompilationPolicy::can_be_compiled(mh, comp_level);
   }
 WB_END
 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
   MutexLockerEx mu(Compile_lock);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   return mh->queued_for_compilation();
 WB_END
 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
   return (code != NULL ? code->comp_level() : CompLevel_none);
 WB_END
 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION(env);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   if (is_osr) {
     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
   } else {
     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
   }
 WB_END
 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 WB_END
 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   bool result = mh->dont_inline();
   mh->set_dont_inline(value == JNI_TRUE);
   return result;
 WB_END
 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
   if (comp_level == CompLevel_any) {
     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
   } else {
     return CompileBroker::queue_size(comp_level);
   }
 WB_END
 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   bool result = mh->force_inline();
   mh->set_force_inline(value == JNI_TRUE);
   return result;
 WB_END
 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
   MutexLockerEx mu(Compile_lock);
   return (mh->queued_for_compilation() || nm != NULL);
 WB_END
 class VM_WhiteBoxOperation : public VM_Operation {
  public:
   VM_WhiteBoxOperation()                         { }
   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
   bool allow_nested_vm_operations() const        { return true; }
 };
 class AlwaysFalseClosure : public BoolObjectClosure {
  public:
   bool do_object_b(oop p) { return false; }
 };
 static AlwaysFalseClosure always_false;
 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation {
  public:
   VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { }
   void doit() {
     _mdo->clean_method_data(&always_false);
   }
  private:
   MethodData* _mdo;
 };
 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION(env);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   MutexLockerEx mu(Compile_lock);
   MethodData* mdo = mh->method_data();
   MethodCounters* mcs = mh->method_counters();
   if (mdo != NULL) {
     mdo->init();
     ResourceMark rm;
     int arg_count = mdo->method()->size_of_parameters();
     for (int i = 0; i < arg_count; i++) {
       mdo->set_arg_modified(i, 0);
     }
     VM_WhiteBoxCleanMethodData op(mdo);
     VMThread::execute(&op);
   }
   mh->clear_not_c1_compilable();
   mh->clear_not_c2_compilable();
   mh->clear_not_c2_osr_compilable();
   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
   if (mcs != NULL) {
     mcs->backedge_counter()->init();
     mcs->invocation_counter()->init();
     mcs->set_interpreter_invocation_count(0);
     mcs->set_interpreter_throwout_count(0);
 #ifdef TIERED
     mcs->set_rate(0.0F);
     mh->set_prev_event_count(0, THREAD);
     mh->set_prev_time(0, THREAD);
 #endif
   }
 WB_END
 template <typename T>
 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*)) {
   if (name == NULL) {
     return false;
   }
   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
   const char* flag_name = env->GetStringUTFChars(name, NULL);
   bool result = (*TAt)(flag_name, value);
   env->ReleaseStringUTFChars(name, flag_name);
   return result;
 }
 template <typename T>
 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
   if (name == NULL) {
     return false;
   }
   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
   const char* flag_name = env->GetStringUTFChars(name, NULL);
   bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
   env->ReleaseStringUTFChars(name, flag_name);
   return result;
 }
 template <typename T>
 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
   ResourceMark rm(thread);
   jclass clazz = env->FindClass(name->as_C_string());
   CHECK_JNI_EXCEPTION_(env, NULL);
   jmethodID methodID = env->GetStaticMethodID(clazz,
         vmSymbols::valueOf_name()->as_C_string(),
         sig->as_C_string());
   CHECK_JNI_EXCEPTION_(env, NULL);
   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
   CHECK_JNI_EXCEPTION_(env, NULL);
   return result;
 }
 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
 }
 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
 }
 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
 }
 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
 }*/
 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
 }
 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
   bool result;
   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
     return booleanBox(thread, env, result);
   }
   return NULL;
 WB_END
 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
   intx result;
   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
     return longBox(thread, env, result);
   }
   return NULL;
 WB_END
 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
   uintx result;
   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
     return longBox(thread, env, result);
   }
   return NULL;
 WB_END
 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
   uint64_t result;
   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
     return longBox(thread, env, result);
   }
   return NULL;
 WB_END
 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
   double result;
   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
     return doubleBox(thread, env, result);
   }
   return NULL;
 WB_END
 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
   ccstr ccstrResult;
   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
     jstring result = env->NewStringUTF(ccstrResult);
     CHECK_JNI_EXCEPTION_(env, NULL);
     return result;
   }
   return NULL;
 WB_END
 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
   bool result = value == JNI_TRUE ? true : false;
   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
 WB_END
 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
   intx result = value;
   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
 WB_END
 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
   uintx result = value;
   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
 WB_END
 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
   uint64_t result = value;
   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
 WB_END
 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
   double result = value;
   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
 WB_END
 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
   const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
   ccstr ccstrResult = ccstrValue;
   bool needFree;
   {
     ThreadInVMfromNative ttvfn(thread); // back to VM
     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
   }
   if (value != NULL) {
     env->ReleaseStringUTFChars(value, ccstrValue);
   }
   if (needFree) {
     FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
   }
 WB_END
 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
   ResourceMark rm(THREAD);
   int len;
   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
   return (StringTable::lookup(name, len) != NULL);
 WB_END
 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
   Universe::heap()->collect(GCCause::_last_ditch_collection);
 WB_END
 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
   // static+volatile in order to force the read to happen
   // (not be eliminated by the compiler)
   static char c;
   static volatile char* p;
   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
   if (p == NULL) {
     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
   }
   c = *p;
 WB_END
 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
   const char* cpu_features = VM_Version::cpu_features();
   ThreadToNativeFromVM ttn(thread);
   jstring features_string = env->NewStringUTF(cpu_features);
   CHECK_JNI_EXCEPTION_(env, NULL);
   return features_string;
 WB_END
 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
   ResourceMark rm(THREAD);
   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
   CHECK_JNI_EXCEPTION_(env, NULL);
   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
   jobjectArray result = NULL;
   if (code == NULL) {
     return result;
   }
   int insts_size = code->insts_size();
   ThreadToNativeFromVM ttn(thread);
   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
   CHECK_JNI_EXCEPTION_(env, NULL);
   result = env->NewObjectArray(2, clazz, NULL);
   if (result == NULL) {
     return result;
   }
   jobject obj = integerBox(thread, env, code->comp_level());
   CHECK_JNI_EXCEPTION_(env, NULL);
   env->SetObjectArrayElement(result, 0, obj);
   jbyteArray insts = env->NewByteArray(insts_size);
   CHECK_JNI_EXCEPTION_(env, NULL);
   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
   env->SetObjectArrayElement(result, 1, insts);
   return result;
 WB_END
 int WhiteBox::array_bytes_to_length(size_t bytes) {
   return Array<u1>::bytes_to_length(bytes);
 }
 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
   if (size < 0) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
   }
   oop class_loader_oop = JNIHandles::resolve(class_loader);
   ClassLoaderData* cld = class_loader_oop != NULL
       ? java_lang_ClassLoader::loader_data(class_loader_oop)
       : ClassLoaderData::the_null_class_loader_data();
   void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
   return (jlong)(uintptr_t)metadata;
 WB_END
 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
   oop class_loader_oop = JNIHandles::resolve(class_loader);
   ClassLoaderData* cld = class_loader_oop != NULL
       ? java_lang_ClassLoader::loader_data(class_loader_oop)
       : ClassLoaderData::the_null_class_loader_data();
   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
 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
   Klass* 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;
   Klass* 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"isClassAlive0",      CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
   {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    },
   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
 #if INCLUDE_ALL_GCS
   {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 // INCLUDE_ALL_GCS
 #if INCLUDE_NMT
   {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},
 #endif // INCLUDE_NMT
   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
   {CC"deoptimizeMethod",   CC"(Ljava/lang/reflect/Executable;Z)I",
                                                       (void*)&WB_DeoptimizeMethod  },
   {CC"isMethodCompiled",   CC"(Ljava/lang/reflect/Executable;Z)Z",
                                                       (void*)&WB_IsMethodCompiled  },
   {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
                                                       (void*)&WB_IsMethodCompilable},
   {CC"isMethodQueuedForCompilation",
       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
   {CC"makeMethodNotCompilable",
       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
   {CC"testSetDontInlineMethod",
       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
   {CC"getMethodCompilationLevel",
       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
   {CC"getMethodEntryBci",
       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
   {CC"getCompileQueueSize",
       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
   {CC"testSetForceInlineMethod",
       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
   {CC"enqueueMethodForCompilation",
       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
   {CC"clearMethodState",
       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
                                                       (void*)&WB_SetStringVMFlag},
   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
                                                       (void*)&WB_GetBooleanVMFlag},
   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
                                                       (void*)&WB_GetIntxVMFlag},
   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
                                                       (void*)&WB_GetUintxVMFlag},
   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
                                                       (void*)&WB_GetUint64VMFlag},
   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
                                                       (void*)&WB_GetDoubleVMFlag},
   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
                                                       (void*)&WB_GetStringVMFlag},
   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
   {CC"allocateMetaspace",
      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
   {CC"freeMetaspace",
      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
   {CC"getNMethod",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
                                                       (void*)&WB_GetNMethod         },
 };
 #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()) {
         ResourceMark rm;
         ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
         bool result = true;
         //  one by one registration natives for exception catching
         jclass exceptionKlass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
         CHECK_JNI_EXCEPTION(env);
         for (int i = 0, n = sizeof(methods) / sizeof(methods[0]); i < n; ++i) {
           if (env->RegisterNatives(wbclass, methods + i, 1) != 0) {
             result = false;
             jthrowable throwable_obj = env->ExceptionOccurred();
             if (throwable_obj != NULL) {
               env->ExceptionClear();
               if (env->IsInstanceOf(throwable_obj, exceptionKlass)) {
                 // j.l.NoSuchMethodError is thrown when a method can't be found or a method is not native
                 // ignoring the exception
                 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s", methods[i].name, methods[i].signature);
               }
             } else {
               // register is failed w/o exception or w/ unexpected exception
               tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered", methods[i].name, methods[i].signature);
               env->UnregisterNatives(wbclass);
               break;
             }
           }
         }
         if (result) {
           WhiteBox::set_used();
         }
       }
     }
   }
 JVM_END

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/prims/whitebox.cpp@2c6ef90f030a (annotated)

src/share/vm/prims/whitebox.cpp