8196602: Change HeapRegionClosure to comply to naming conventions
Reviewed-by: kbarrett, sjohanss
/*
* Copyright (c) 2012, 2017, 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 <new>
#include "classfile/classLoaderData.hpp"
#include "classfile/modules.hpp"
#include "classfile/stringTable.hpp"
#include "code/codeCache.hpp"
#include "compiler/methodMatcher.hpp"
#include "compiler/directivesParser.hpp"
#include "jvmtifiles/jvmtiEnv.hpp"
#include "memory/metadataFactory.hpp"
#include "memory/metaspaceShared.hpp"
#include "memory/iterator.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
#include "memory/oopFactory.hpp"
#include "oops/array.hpp"
#include "oops/constantPool.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/objArrayOop.inline.hpp"
#include "oops/oop.inline.hpp"
#include "prims/wbtestmethods/parserTests.hpp"
#include "prims/whitebox.hpp"
#include "runtime/arguments.hpp"
#include "runtime/compilationPolicy.hpp"
#include "runtime/deoptimization.hpp"
#include "runtime/handshake.hpp"
#include "runtime/interfaceSupport.hpp"
#include "runtime/javaCalls.hpp"
#include "runtime/os.hpp"
#include "runtime/sweeper.hpp"
#include "runtime/thread.hpp"
#include "runtime/threadSMR.hpp"
#include "runtime/vm_version.hpp"
#include "utilities/align.hpp"
#include "utilities/debug.hpp"
#include "utilities/exceptions.hpp"
#include "utilities/macros.hpp"
#if INCLUDE_CDS
#include "prims/cdsoffsets.hpp"
#endif // INCLUDE_CDS
#if INCLUDE_ALL_GCS
#include "gc/g1/concurrentMarkThread.hpp"
#include "gc/g1/g1CollectedHeap.inline.hpp"
#include "gc/g1/g1ConcurrentMark.hpp"
#include "gc/g1/heapRegionRemSet.hpp"
#include "gc/parallel/parallelScavengeHeap.inline.hpp"
#include "gc/parallel/adjoiningGenerations.hpp"
#endif // INCLUDE_ALL_GCS
#if INCLUDE_NMT
#include "services/mallocSiteTable.hpp"
#include "services/memTracker.hpp"
#include "utilities/nativeCallStack.hpp"
#endif // INCLUDE_NMT
#ifdef LINUX
#include "utilities/elfFile.hpp"
#include "osContainer_linux.hpp"
#endif
#define SIZE_T_MAX_VALUE ((size_t) -1)
bool WhiteBox::_used = false;
volatile bool WhiteBox::compilation_locked = false;
class VM_WhiteBoxOperation : public VM_Operation {
public:
VM_WhiteBoxOperation() { }
VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
bool allow_nested_vm_operations() const { return true; }
};
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(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
return os::vm_page_size();
WB_END
WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
return os::vm_allocation_granularity();
WB_END
WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
return os::large_page_size();
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))
oop h_name = JNIHandles::resolve(name);
if (h_name == 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(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
#if INCLUDE_JVMTI
ResourceMark rm;
const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
assert(err == JVMTI_ERROR_NONE, "must not fail");
#endif
}
WB_END
WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
#if INCLUDE_JVMTI
ResourceMark rm;
const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
assert(err == JVMTI_ERROR_NONE, "must not fail");
#endif
}
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();
tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap 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);
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,
p2i(rhs.base()),
p2i(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);
VirtualSpace vs;
if (!vs.initialize(rhs, 0)) {
tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
return 3;
}
int seed = os::random();
tty->print_cr("Random seed is %d", 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
static const jint serial_code = 1;
static const jint parallel_code = 2;
static const jint cms_code = 4;
static const jint g1_code = 8;
WB_ENTRY(jint, WB_CurrentGC(JNIEnv* env, jobject o, jobject obj))
if (UseSerialGC) {
return serial_code;
} else if (UseParallelGC || UseParallelOldGC) {
return parallel_code;
} if (UseConcMarkSweepGC) {
return cms_code;
} else if (UseG1GC) {
return g1_code;
}
ShouldNotReachHere();
return 0;
WB_END
WB_ENTRY(jint, WB_AllSupportedGC(JNIEnv* env, jobject o, jobject obj))
#if INCLUDE_ALL_GCS
return serial_code | parallel_code | cms_code | g1_code;
#else
return serial_code;
#endif // INCLUDE_ALL_GCS
WB_END
WB_ENTRY(jboolean, WB_GCSelectedByErgo(JNIEnv* env, jobject o, jobject obj))
if (UseSerialGC) {
return FLAG_IS_ERGO(UseSerialGC);
} else if (UseParallelGC) {
return FLAG_IS_ERGO(UseParallelGC);
} else if (UseParallelOldGC) {
return FLAG_IS_ERGO(UseParallelOldGC);
} else if (UseConcMarkSweepGC) {
return FLAG_IS_ERGO(UseConcMarkSweepGC);
} else if (UseG1GC) {
return FLAG_IS_ERGO(UseG1GC);
}
ShouldNotReachHere();
return false;
WB_END
WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
oop p = JNIHandles::resolve(obj);
#if INCLUDE_ALL_GCS
if (UseG1GC) {
G1CollectedHeap* g1 = G1CollectedHeap::heap();
const HeapRegion* hr = g1->heap_region_containing(p);
if (hr == NULL) {
return false;
}
return !(hr->is_young());
} else if (UseParallelGC) {
ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
return !psh->is_in_young(p);
}
#endif // INCLUDE_ALL_GCS
GenCollectedHeap* gch = GenCollectedHeap::heap();
return !gch->is_in_young(p);
WB_END
WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
oop p = JNIHandles::resolve(obj);
return p->size() * HeapWordSize;
WB_END
WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
size_t alignment = Universe::heap()->collector_policy()->space_alignment();
return (jlong)alignment;
WB_END
WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
size_t alignment = Universe::heap()->collector_policy()->heap_alignment();
return (jlong)alignment;
WB_END
WB_ENTRY(jboolean, WB_SupportsConcurrentGCPhaseControl(JNIEnv* env, jobject o))
return Universe::heap()->supports_concurrent_phase_control();
WB_END
WB_ENTRY(jobjectArray, WB_GetConcurrentGCPhases(JNIEnv* env, jobject o))
const char* const* phases = Universe::heap()->concurrent_phases();
jint nphases = 0;
for ( ; phases[nphases] != NULL; ++nphases) ;
ResourceMark rm(thread);
ThreadToNativeFromVM ttn(thread);
jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
CHECK_JNI_EXCEPTION_(env, NULL);
jobjectArray result = env->NewObjectArray(nphases, clazz, NULL);
CHECK_JNI_EXCEPTION_(env, NULL);
// If push fails, return with pending exception.
if (env->PushLocalFrame(nphases) < 0) return NULL;
for (jint i = 0; i < nphases; ++i) {
jstring phase = env->NewStringUTF(phases[i]);
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetObjectArrayElement(result, i, phase);
CHECK_JNI_EXCEPTION_(env, NULL);
}
env->PopLocalFrame(NULL);
return result;
WB_END
WB_ENTRY(jboolean, WB_RequestConcurrentGCPhase(JNIEnv* env, jobject o, jstring name))
Handle h_name(THREAD, JNIHandles::resolve(name));
ResourceMark rm;
const char* c_name = java_lang_String::as_utf8_string(h_name());
return Universe::heap()->request_concurrent_phase(c_name);
WB_END
#if INCLUDE_ALL_GCS
WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
if (UseG1GC) {
G1CollectedHeap* g1 = G1CollectedHeap::heap();
oop result = JNIHandles::resolve(obj);
const HeapRegion* hr = g1->heap_region_containing(result);
return hr->is_humongous();
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
WB_END
WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
if (UseG1GC) {
G1CollectedHeap* g1 = G1CollectedHeap::heap();
const HeapRegion* hr = g1->heap_region_containing((void*) addr);
return hr->is_humongous();
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
WB_END
WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
if (UseG1GC) {
G1CollectedHeap* g1 = G1CollectedHeap::heap();
const HeapRegion* hr = g1->heap_region_containing((void*) addr);
return hr->is_free();
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
WB_END
WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
if (UseG1GC) {
G1CollectedHeap* g1 = G1CollectedHeap::heap();
size_t nr = g1->max_regions();
return (jlong)nr;
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
WB_END
WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
if (UseG1GC) {
G1CollectedHeap* g1 = G1CollectedHeap::heap();
size_t nr = g1->num_free_regions();
return (jlong)nr;
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
WB_END
WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
if (UseG1GC) {
G1CollectedHeap* g1h = G1CollectedHeap::heap();
return g1h->concurrent_mark()->cm_thread()->during_cycle();
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
WB_END
WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
if (UseG1GC) {
G1CollectedHeap* g1h = G1CollectedHeap::heap();
if (!g1h->concurrent_mark()->cm_thread()->during_cycle()) {
g1h->collect(GCCause::_wb_conc_mark);
return true;
}
return false;
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1StartMarkCycle: G1 GC is not enabled");
WB_END
WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
if (UseG1GC) {
return (jint)HeapRegion::GrainBytes;
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
WB_END
WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
#if INCLUDE_ALL_GCS
if (UseParallelGC) {
return ParallelScavengeHeap::heap()->gens()->virtual_spaces()->alignment();
}
#endif // INCLUDE_ALL_GCS
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
WB_END
WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
#if INCLUDE_ALL_GCS
if (UseParallelGC) {
return ParallelScavengeHeap::heap()->generation_alignment();
}
#endif // INCLUDE_ALL_GCS
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
WB_END
WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
#if INCLUDE_ALL_GCS
if (UseG1GC) {
ResourceMark rm(THREAD);
G1CollectedHeap* g1h = G1CollectedHeap::heap();
MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
return JNIHandles::make_local(env, h());
}
#endif // INCLUDE_ALL_GCS
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
WB_END
class OldRegionsLivenessClosure: public HeapRegionClosure {
private:
const int _liveness;
size_t _total_count;
size_t _total_memory;
size_t _total_memory_to_free;
public:
OldRegionsLivenessClosure(int liveness) :
_liveness(liveness),
_total_count(0),
_total_memory(0),
_total_memory_to_free(0) { }
size_t total_count() { return _total_count; }
size_t total_memory() { return _total_memory; }
size_t total_memory_to_free() { return _total_memory_to_free; }
bool do_heap_region(HeapRegion* r) {
if (r->is_old()) {
size_t prev_live = r->marked_bytes();
size_t live = r->live_bytes();
size_t size = r->used();
size_t reg_size = HeapRegion::GrainBytes;
if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
_total_memory += size;
++_total_count;
if (size == reg_size) {
// we don't include non-full regions since they are unlikely included in mixed gc
// for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
_total_memory_to_free += size - prev_live;
}
}
}
return false;
}
};
WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
if (!UseG1GC) {
THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
}
if (liveness < 0) {
THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
}
G1CollectedHeap* g1h = G1CollectedHeap::heap();
OldRegionsLivenessClosure rli(liveness);
g1h->heap_region_iterate(&rli);
typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
result->long_at_put(0, rli.total_count());
result->long_at_put(1, rli.total_memory());
result->long_at_put(2, rli.total_memory_to_free());
return (jlongArray) JNIHandles::make_local(env, result);
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;
addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
return addr;
WB_END
// Alloc memory with pseudo call stack. The test can create psudo malloc
// allocation site to stress the malloc tracking.
WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
address pc = (address)(size_t)pseudo_stack;
NativeCallStack stack(&pc, 1);
return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
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);
WB_END
WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
jlong addr = 0;
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
WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
// Test that we can downgrade NMT levels but not upgrade them.
if (MemTracker::tracking_level() == NMT_off) {
MemTracker::transition_to(NMT_off);
return MemTracker::tracking_level() == NMT_off;
} else {
assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
MemTracker::transition_to(NMT_summary);
assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
// Can't go to detail once NMT is set to summary.
MemTracker::transition_to(NMT_detail);
assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
// Shutdown sets tracking level to minimal.
MemTracker::shutdown();
assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
// Once the tracking level is minimal, we cannot increase to summary.
// The code ignores this request instead of asserting because if the malloc site
// table overflows in another thread, it tries to change the code to summary.
MemTracker::transition_to(NMT_summary);
assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
// Really can never go up to detail, verify that the code would never do this.
MemTracker::transition_to(NMT_detail);
assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
return MemTracker::tracking_level() == NMT_minimal;
}
WB_END
WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
int hash_size = MallocSiteTable::hash_buckets();
assert(hash_size > 0, "NMT hash_size should be > 0");
return (jint)hash_size;
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);
}
// Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
private:
int _result;
const bool _make_not_entrant;
public:
VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
_result(0), _make_not_entrant(make_not_entrant) { }
int result() const { return _result; }
void doit() {
for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
if (t->has_last_Java_frame()) {
for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
frame* f = fst.current();
if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
RegisterMap* reg_map = fst.register_map();
Deoptimization::deoptimize(t, *f, reg_map);
if (_make_not_entrant) {
CompiledMethod* cm = CodeCache::find_compiled(f->pc());
assert(cm != NULL, "sanity check");
cm->make_not_entrant();
}
++_result;
}
}
}
}
}
};
WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
VMThread::execute(&op);
return op.result();
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
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));
if (is_osr) {
result += mh->mark_osr_nmethods();
} else if (mh->code() != NULL) {
mh->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));
CompiledMethod* 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))
if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
return false;
}
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(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
if (compLevel < CompLevel_none || compLevel > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
return false; // Intrinsic is not available on a non-existent compilation level.
}
jmethodID method_id, compilation_context_id;
method_id = reflected_method_to_jmid(thread, env, method);
CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
DirectiveSet* directive;
AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
assert(comp != NULL, "compiler not available");
if (compilation_context != NULL) {
compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
directive = DirectivesStack::getMatchingDirective(cch, comp);
} else {
// Calling with NULL matches default directive
directive = DirectivesStack::getDefaultDirective(comp);
}
bool result = comp->is_intrinsic_available(mh, directive);
DirectivesStack::release(directive);
return result;
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));
CompiledMethod* 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));
CompiledMethod* 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
bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
// Screen for unavailable/bad comp level or null method
if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier) ||
CompileBroker::compiler(comp_level) == NULL) {
return false;
}
methodHandle mh(THREAD, method);
nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, THREAD);
MutexLockerEx mu(Compile_lock);
return (mh->queued_for_compilation() || nm != NULL);
}
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);
return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
WB_END
WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
return WhiteBox::compile_method(ik->class_initializer(), comp_level, InvocationEntryBci, THREAD);
WB_END
WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
jmethodID jmid = reflected_method_to_jmid(thread, env, method);
CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
bool result = directive->PrintAssemblyOption;
DirectivesStack::release(directive);
return result;
WB_END
WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
jmethodID jmid = reflected_method_to_jmid(thread, env, method);
CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
ResourceMark rm;
const char* error_msg = NULL;
char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
if (m == NULL) {
assert(error_msg != NULL, "Always have an error message");
tty->print_cr("Got error: %s", error_msg);
return -1; // Pattern failed
}
// Pattern works - now check if it matches
int result;
if (m->match(mh, InlineMatcher::force_inline)) {
result = 2; // Force inline match
} else if (m->match(mh, InlineMatcher::dont_inline)) {
result = 1; // Dont inline match
} else {
result = 0; // No match
}
delete m;
return result;
WB_END
WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
jmethodID jmid = reflected_method_to_jmid(thread, env, method);
CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
ResourceMark rm;
char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
const char* error_msg = NULL;
BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
if (m == NULL) {
assert(error_msg != NULL, "Must have error_msg");
tty->print_cr("Got error: %s", error_msg);
return -1;
}
// Pattern works - now check if it matches
int result = m->matches(mh);
delete m;
assert(result == 0 || result == 1, "Result out of range");
return result;
WB_END
static AlwaysFalseClosure always_false;
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);
}
MutexLockerEx mu(mdo->extra_data_lock());
mdo->clean_method_data(&always_false);
}
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);
mh->set_prev_time(0);
#endif
}
WB_END
template <typename T>
static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
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);
CHECK_JNI_EXCEPTION_(env, false);
Flag::Error result = (*TAt)(flag_name, value, true, true);
env->ReleaseStringUTFChars(name, flag_name);
return (result == Flag::SUCCESS);
}
template <typename T>
static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*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);
CHECK_JNI_EXCEPTION_(env, false);
Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
env->ReleaseStringUTFChars(name, flag_name);
return (result == Flag::SUCCESS);
}
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);
}
static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
const char* flag_name = env->GetStringUTFChars(name, NULL);
CHECK_JNI_EXCEPTION_(env, NULL);
Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
env->ReleaseStringUTFChars(name, flag_name);
return result;
}
WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
Flag* flag = getVMFlag(thread, env, name);
return (flag != NULL) && flag->is_constant_in_binary();
WB_END
WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
Flag* flag = getVMFlag(thread, env, name);
return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
WB_END
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_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
int result;
if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
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_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
uint result;
if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
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_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_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
uintx result;
if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_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_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
int result = value;
SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
WB_END
WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
uint result = value;
SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
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_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
size_t result = value;
SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_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;
if (value == NULL) {
ccstrValue = NULL;
}
else {
ccstrValue = env->GetStringUTFChars(value, NULL);
CHECK_JNI_EXCEPTION(env);
}
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);
}
WB_END
WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
WhiteBox::compilation_locked = true;
WB_END
WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
WhiteBox::compilation_locked = false;
mo.notify_all();
WB_END
WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
// Force a code cache sweep and block until it finished
NMethodSweeper::force_sweep();
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::_wb_full_gc);
#if INCLUDE_ALL_GCS
if (UseG1GC) {
// Needs to be cleared explicitly for G1
Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
}
#endif // INCLUDE_ALL_GCS
WB_END
WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
Universe::heap()->collect(GCCause::_wb_young_gc);
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* features = VM_Version::features_string();
ThreadToNativeFromVM ttn(thread);
jstring features_string = env->NewStringUTF(features);
CHECK_JNI_EXCEPTION_(env, NULL);
return features_string;
WB_END
int WhiteBox::get_blob_type(const CodeBlob* code) {
guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
if (code->is_aot()) {
return -1;
}
return CodeCache::get_code_heap(code)->code_blob_type();
}
CodeHeap* WhiteBox::get_code_heap(int blob_type) {
guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
return CodeCache::get_code_heap(blob_type);
}
struct CodeBlobStub {
CodeBlobStub(const CodeBlob* blob) :
name(os::strdup(blob->name())),
size(blob->size()),
blob_type(WhiteBox::get_blob_type(blob)),
address((jlong) blob) { }
~CodeBlobStub() { os::free((void*) name); }
const char* const name;
const jint size;
const jint blob_type;
const jlong address;
};
static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
CHECK_JNI_EXCEPTION_(env, NULL);
jobjectArray result = env->NewObjectArray(4, clazz, NULL);
jstring name = env->NewStringUTF(cb->name);
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetObjectArrayElement(result, 0, name);
jobject obj = integerBox(thread, env, cb->size);
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetObjectArrayElement(result, 1, obj);
obj = integerBox(thread, env, cb->blob_type);
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetObjectArrayElement(result, 2, obj);
obj = longBox(thread, env, cb->address);
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetObjectArrayElement(result, 3, obj);
return result;
}
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));
CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
jobjectArray result = NULL;
if (code == NULL) {
return result;
}
int comp_level = code->comp_level();
int insts_size = comp_level == CompLevel_aot ? code->code_end() - code->code_begin() : 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(5, clazz, NULL);
if (result == NULL) {
return result;
}
CodeBlobStub stub(code);
jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetObjectArrayElement(result, 0, codeBlob);
jobject level = integerBox(thread, env, comp_level);
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetObjectArrayElement(result, 1, level);
jbyteArray insts = env->NewByteArray(insts_size);
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
env->SetObjectArrayElement(result, 2, insts);
jobject id = integerBox(thread, env, code->compile_id());
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetObjectArrayElement(result, 3, id);
jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetObjectArrayElement(result, 4, entry_point);
return result;
WB_END
CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
BufferBlob* blob;
int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
if (full_size < size) {
full_size += align_up(size - full_size, oopSize);
}
{
MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
::new (blob) BufferBlob("WB::DummyBlob", full_size);
}
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
return blob;
}
WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
if (size < 0) {
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
}
return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
WB_END
WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
if (addr == 0) {
return;
}
BufferBlob::free((BufferBlob*) addr);
WB_END
WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
ResourceMark rm;
GrowableArray<CodeBlobStub*> blobs;
{
MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
if (heap == NULL) {
return NULL;
}
for (CodeBlob* cb = (CodeBlob*) heap->first();
cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
new (stub) CodeBlobStub(cb);
blobs.append(stub);
}
}
if (blobs.length() == 0) {
return NULL;
}
ThreadToNativeFromVM ttn(thread);
jobjectArray result = NULL;
jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
CHECK_JNI_EXCEPTION_(env, NULL);
result = env->NewObjectArray(blobs.length(), clazz, NULL);
CHECK_JNI_EXCEPTION_(env, NULL);
if (result == NULL) {
return result;
}
int i = 0;
for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
it != blobs.end(); ++it) {
jobjectArray obj = codeBlob2objectArray(thread, env, *it);
CHECK_JNI_EXCEPTION_(env, NULL);
env->SetObjectArrayElement(result, i, obj);
CHECK_JNI_EXCEPTION_(env, NULL);
++i;
}
return result;
WB_END
WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
return CompileBroker::get_compilation_activity_mode();
WB_END
WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
if (addr == 0) {
THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
"WB_GetCodeBlob: addr is null");
}
ThreadToNativeFromVM ttn(thread);
CodeBlobStub stub((CodeBlob*) addr);
return codeBlob2objectArray(thread, env, &stub);
WB_END
WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
jmethodID jmid = reflected_method_to_jmid(thread, env, method);
CHECK_JNI_EXCEPTION_(env, 0);
methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
return (jlong) mh->method_data();
WB_END
WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
return (jlong) Thread::current()->stack_size();
WB_END
WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
JavaThread* t = JavaThread::current();
return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
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_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
WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
jstring version, jstring location, jobjectArray packages))
ResourceMark rm(THREAD);
objArrayOop packages_oop = objArrayOop(JNIHandles::resolve(packages));
objArrayHandle packages_h(THREAD, packages_oop);
int num_packages = (packages_h == NULL ? 0 : packages_h->length());
char** pkgs = NULL;
if (num_packages > 0) {
pkgs = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char*, num_packages);
for (int x = 0; x < num_packages; x++) {
oop pkg_str = packages_h->obj_at(x);
if (pkg_str == NULL || !pkg_str->is_a(SystemDictionary::String_klass())) {
THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
err_msg("Bad package name"));
}
pkgs[x] = java_lang_String::as_utf8_string(pkg_str);
}
}
Modules::define_module(module, is_open, version, location, (const char* const*)pkgs, num_packages, CHECK);
WB_END
WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
ResourceMark rm(THREAD);
char* package_name = NULL;
if (package != NULL) {
package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
}
Modules::add_module_exports_qualified(from_module, package_name, to_module, CHECK);
WB_END
WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
ResourceMark rm(THREAD);
char* package_name = NULL;
if (package != NULL) {
package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
}
Modules::add_module_exports_to_all_unnamed(module, package_name, CHECK);
WB_END
WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
ResourceMark rm(THREAD);
char* package_name = NULL;
if (package != NULL) {
package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
}
Modules::add_module_exports(module, package_name, NULL, CHECK);
WB_END
WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
Modules::add_reads_module(from_module, source_module, CHECK);
WB_END
WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
if (inc < 0) {
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
}
jlong max_size_t = (jlong) ((size_t) -1);
if (inc > max_size_t) {
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
}
size_t new_cap_until_GC = 0;
size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
if (!success) {
THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
"WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
"due to contention with another thread");
}
return (jlong) new_cap_until_GC;
WB_END
WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
return (jlong) MetaspaceGC::capacity_until_GC();
WB_END
WB_ENTRY(jboolean, WB_MetaspaceShouldConcurrentCollect(JNIEnv* env, jobject wb))
return MetaspaceGC::should_concurrent_collect();
WB_END
WB_ENTRY(jlong, WB_MetaspaceReserveAlignment(JNIEnv* env, jobject wb))
return (jlong)Metaspace::reserve_alignment();
WB_END
WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
Monitor::_safepoint_check_always :
Monitor::_safepoint_check_never;
MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
attemptedNoSafepointValue == JNI_TRUE);
WB_END
WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
oop obj_oop = JNIHandles::resolve(obj);
return (jboolean) obj_oop->mark()->has_monitor();
WB_END
WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
VM_ForceSafepoint force_safepoint_op;
VMThread::execute(&force_safepoint_op);
WB_END
WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
return (jlong) ik->constants();
WB_END
WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
return ConstantPool::CPCACHE_INDEX_TAG;
WB_END
WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
ConstantPool* cp = ik->constants();
if (cp->cache() == NULL) {
return -1;
}
return cp->cache()->length();
WB_END
WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
ConstantPool* cp = ik->constants();
if (cp->cache() == NULL) {
THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
}
jint cpci = index;
jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
}
jint cpi = cp->remap_instruction_operand_from_cache(cpci);
return cpi;
WB_END
WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
return ConstantPool::encode_invokedynamic_index(index);
WB_END
WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
VMThread::execute(&clear_ics);
WB_END
template <typename T>
static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
assert(value != NULL, "sanity");
if (method == NULL || name == NULL) {
return false;
}
jmethodID jmid = reflected_method_to_jmid(thread, env, method);
CHECK_JNI_EXCEPTION_(env, false);
methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
const char* flag_name = env->GetStringUTFChars(name, NULL);
CHECK_JNI_EXCEPTION_(env, false);
bool result = CompilerOracle::has_option_value(mh, flag_name, *value);
env->ReleaseStringUTFChars(name, flag_name);
return result;
}
WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
bool result;
if (GetMethodOption<bool> (thread, env, method, name, &result)) {
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
return booleanBox(thread, env, result);
}
return NULL;
WB_END
WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
intx result;
if (GetMethodOption <intx> (thread, env, method, name, &result)) {
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
return longBox(thread, env, result);
}
return NULL;
WB_END
WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
uintx result;
if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
return longBox(thread, env, result);
}
return NULL;
WB_END
WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
double result;
if (GetMethodOption <double> (thread, env, method, name, &result)) {
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
return doubleBox(thread, env, result);
}
return NULL;
WB_END
WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
ccstr ccstrResult;
if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
jstring result = env->NewStringUTF(ccstrResult);
CHECK_JNI_EXCEPTION_(env, NULL);
return result;
}
return NULL;
WB_END
WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
oop obj_oop = JNIHandles::resolve(obj);
return oopDesc::is_archive_object(obj_oop);
WB_END
WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
WB_END
WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
return !StringTable::shared_string_mapped();
WB_END
WB_ENTRY(jobject, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass clazz))
Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
if (k->is_instance_klass()) {
InstanceKlass *ik = InstanceKlass::cast(k);
ConstantPool *cp = ik->constants();
objArrayOop refs = cp->resolved_references();
return (jobject)JNIHandles::make_local(env, refs);
} else {
return NULL;
}
WB_END
WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
return MetaspaceShared::open_archive_heap_region_mapped();
WB_END
WB_ENTRY(jboolean, WB_IsCDSIncludedInVmBuild(JNIEnv* env))
#if INCLUDE_CDS
return true;
#else
return false;
#endif
WB_END
#if INCLUDE_CDS
WB_ENTRY(jint, WB_GetOffsetForName(JNIEnv* env, jobject o, jstring name))
ResourceMark rm;
char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
int result = CDSOffsets::find_offset(c_name);
return (jint)result;
WB_END
#endif // INCLUDE_CDS
WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
class TraceSelfClosure : public ThreadClosure {
jint _num_threads_completed;
void do_thread(Thread* th) {
assert(th->is_Java_thread(), "sanity");
JavaThread* jt = (JavaThread*)th;
ResourceMark rm;
jt->print_on(tty);
jt->print_stack_on(tty);
tty->cr();
Atomic::inc(&_num_threads_completed);
}
public:
TraceSelfClosure() : _num_threads_completed(0) {}
jint num_threads_completed() const { return _num_threads_completed; }
};
TraceSelfClosure tsc;
if (all_threads) {
Handshake::execute(&tsc);
} else {
oop thread_oop = JNIHandles::resolve(thread_handle);
if (thread_oop != NULL) {
JavaThread* target = java_lang_Thread::thread(thread_oop);
Handshake::execute(&tsc, target);
}
}
return tsc.num_threads_completed();
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());
vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem 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;
}
void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
ResourceMark rm;
ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
// one by one registration natives for exception catching
jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
CHECK_JNI_EXCEPTION(env);
for (int i = 0, n = method_count; i < n; ++i) {
// Skip dummy entries
if (method_array[i].fnPtr == NULL) continue;
if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
jthrowable throwable_obj = env->ExceptionOccurred();
if (throwable_obj != NULL) {
env->ExceptionClear();
if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
// NoSuchMethodError is thrown when a method can't be found or a method is not native.
// Ignoring the exception since it is not preventing use of other WhiteBox methods.
tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
method_array[i].name, method_array[i].signature);
}
} else {
// Registration failed unexpectedly.
tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
method_array[i].name, method_array[i].signature);
env->UnregisterNatives(wbclass);
break;
}
}
}
}
WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
// can't be in VM when we call JNI
ThreadToNativeFromVM ttnfv(thread);
const char* dir = env->GetStringUTFChars(compDirect, NULL);
CHECK_JNI_EXCEPTION_(env, 0);
int ret;
{
ThreadInVMfromNative ttvfn(thread); // back to VM
ret = DirectivesParser::parse_string(dir, tty);
}
env->ReleaseStringUTFChars(compDirect, dir);
// -1 for error parsing directive. Return 0 as number of directives added.
if (ret == -1) {
ret = 0;
}
return (jint) ret;
WB_END
WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
DirectivesStack::pop(count);
WB_END
// Checks that the library libfile has the noexecstack bit set.
WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
jboolean ret = false;
#ifdef LINUX
// Can't be in VM when we call JNI.
ThreadToNativeFromVM ttnfv(thread);
const char* lf = env->GetStringUTFChars(libfile, NULL);
CHECK_JNI_EXCEPTION_(env, 0);
ret = (jboolean) ElfFile::specifies_noexecstack(lf);
env->ReleaseStringUTFChars(libfile, lf);
#endif
return ret;
WB_END
WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
LINUX_ONLY(return OSContainer::is_containerized();)
return false;
WB_END
WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
os::print_os_info(tty);
WB_END
#define CC (char*)
static JNINativeMethod methods[] = {
{CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
{CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
{CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
{CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
{CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
{CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
{CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
{CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
{CC"getHeapAlignment", CC"()J", (void*)&WB_GetHeapAlignment},
{CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
{CC"parseCommandLine0",
CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
(void*) &WB_ParseCommandLine
},
{CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
(void*)&WB_AddToBootstrapClassLoaderSearch},
{CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
(void*)&WB_AddToSystemClassLoaderSearch},
{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_CDS
{CC"getOffsetForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetOffsetForName},
#endif
#if INCLUDE_ALL_GCS
{CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
{CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
{CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
{CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
{CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
{CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
{CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
{CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
{CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
(void*)&WB_G1AuxiliaryMemoryUsage },
{CC"psVirtualSpaceAlignment",CC"()J", (void*)&WB_PSVirtualSpaceAlignment},
{CC"psHeapGenerationAlignment",CC"()J", (void*)&WB_PSHeapGenerationAlignment},
{CC"g1GetMixedGCInfo", CC"(I)[J", (void*)&WB_G1GetMixedGCInfo },
#endif // INCLUDE_ALL_GCS
#if INCLUDE_NMT
{CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
{CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
{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"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
{CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
#endif // INCLUDE_NMT
{CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
{CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
{CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
(void*)&WB_DeoptimizeMethod },
{CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
(void*)&WB_IsMethodCompiled },
{CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
(void*)&WB_IsMethodCompilable},
{CC"isMethodQueuedForCompilation0",
CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
{CC"isIntrinsicAvailable0",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
(void*)&WB_IsIntrinsicAvailable},
{CC"makeMethodNotCompilable0",
CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
{CC"testSetDontInlineMethod0",
CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
{CC"getMethodCompilationLevel0",
CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
{CC"getMethodEntryBci0",
CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
{CC"getCompileQueueSize",
CC"(I)I", (void*)&WB_GetCompileQueueSize},
{CC"testSetForceInlineMethod0",
CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
{CC"enqueueMethodForCompilation0",
CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
{CC"enqueueInitializerForCompilation0",
CC"(Ljava/lang/Class;I)Z", (void*)&WB_EnqueueInitializerForCompilation},
{CC"clearMethodState0",
CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
{CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
{CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
{CC"matchesMethod",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
(void*)&WB_MatchesMethod},
{CC"matchesInline",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
(void*)&WB_MatchesInline},
{CC"shouldPrintAssembly",
CC"(Ljava/lang/reflect/Executable;I)Z",
(void*)&WB_ShouldPrintAssembly},
{CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
{CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
{CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
{CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
{CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
{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"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
{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"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
(void*)&WB_GetIntVMFlag},
{CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
(void*)&WB_GetUintVMFlag},
{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"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
(void*)&WB_GetSizeTVMFlag},
{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"youngGC", CC"()V", (void*)&WB_YoungGC },
{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"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
{CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
{CC"metaspaceShouldConcurrentCollect", CC"()Z", (void*)&WB_MetaspaceShouldConcurrentCollect },
{CC"metaspaceReserveAlignment", CC"()J", (void*)&WB_MetaspaceReserveAlignment },
{CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
{CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
(void*)&WB_GetNMethod },
{CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
{CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
{CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
{CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
{CC"getCompilationActivityMode",
CC"()I", (void*)&WB_GetCompilationActivityMode},
{CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
(void*)&WB_GetMethodData },
{CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
{CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
{CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
{CC"DefineModule", CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
(void*)&WB_DefineModule },
{CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
(void*)&WB_AddModuleExports },
{CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
(void*)&WB_AddReadsModule },
{CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
(void*)&WB_AddModuleExportsToAllUnnamed },
{CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
(void*)&WB_AddModuleExportsToAll },
{CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
{CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
{CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
{CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
{CC"getConstantPoolCacheIndexTag0", CC"()I", (void*)&WB_GetConstantPoolCacheIndexTag},
{CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_GetConstantPoolCacheLength},
{CC"remapInstructionOperandFromCPCache0",
CC"(Ljava/lang/Class;I)I", (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
{CC"encodeConstantPoolIndyIndex0",
CC"(I)I", (void*)&WB_ConstantPoolEncodeIndyIndex},
{CC"getMethodBooleanOption",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
(void*)&WB_GetMethodBooleaneOption},
{CC"getMethodIntxOption",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
(void*)&WB_GetMethodIntxOption},
{CC"getMethodUintxOption",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
(void*)&WB_GetMethodUintxOption},
{CC"getMethodDoubleOption",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
(void*)&WB_GetMethodDoubleOption},
{CC"getMethodStringOption",
CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
(void*)&WB_GetMethodStringOption},
{CC"isShared", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
{CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
{CC"areSharedStringsIgnored", CC"()Z", (void*)&WB_AreSharedStringsIgnored },
{CC"getResolvedReferences", CC"(Ljava/lang/Class;)Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
{CC"areOpenArchiveHeapObjectsMapped", CC"()Z", (void*)&WB_AreOpenArchiveHeapObjectsMapped},
{CC"isCDSIncludedInVmBuild", CC"()Z", (void*)&WB_IsCDSIncludedInVmBuild },
{CC"clearInlineCaches0", CC"(Z)V", (void*)&WB_ClearInlineCaches },
{CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
{CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
(void*)&WB_AddCompilerDirective },
{CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
{CC"currentGC", CC"()I", (void*)&WB_CurrentGC},
{CC"allSupportedGC", CC"()I", (void*)&WB_AllSupportedGC},
{CC"gcSelectedByErgo", CC"()Z", (void*)&WB_GCSelectedByErgo},
{CC"supportsConcurrentGCPhaseControl", CC"()Z", (void*)&WB_SupportsConcurrentGCPhaseControl},
{CC"getConcurrentGCPhases", CC"()[Ljava/lang/String;",
(void*)&WB_GetConcurrentGCPhases},
{CC"requestConcurrentGCPhase0", CC"(Ljava/lang/String;)Z",
(void*)&WB_RequestConcurrentGCPhase},
{CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
(void*)&WB_CheckLibSpecifiesNoexecstack},
{CC"isContainerized", CC"()Z", (void*)&WB_IsContainerized },
{CC"printOsInfo", CC"()V", (void*)&WB_PrintOsInfo },
};
#undef CC
JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
{
if (WhiteBoxAPI) {
// Make sure that wbclass is loaded by the null classloader
InstanceKlass* ik = InstanceKlass::cast(JNIHandles::resolve(wbclass)->klass());
Handle loader(THREAD, ik->class_loader());
if (loader.is_null()) {
WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
WhiteBox::register_extended(env, wbclass, thread);
WhiteBox::set_used();
}
}
}
JVM_END