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whitebox.cpp
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whitebox.cpp
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/*
* Copyright (c) 2012, 2021, 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 "cds/cdsConstants.hpp"
#include "cds/filemap.hpp"
#include "cds/heapShared.inline.hpp"
#include "cds/metaspaceShared.hpp"
#include "classfile/classLoaderDataGraph.hpp"
#include "classfile/javaClasses.inline.hpp"
#include "classfile/modules.hpp"
#include "classfile/protectionDomainCache.hpp"
#include "classfile/stringTable.hpp"
#include "classfile/symbolTable.hpp"
#include "classfile/systemDictionary.hpp"
#include "classfile/vmSymbols.hpp"
#include "code/codeCache.hpp"
#include "compiler/compilationPolicy.hpp"
#include "compiler/directivesParser.hpp"
#include "compiler/methodMatcher.hpp"
#include "gc/shared/concurrentGCBreakpoints.hpp"
#include "gc/shared/gcConfig.hpp"
#include "gc/shared/gcLocker.inline.hpp"
#include "gc/shared/genArguments.hpp"
#include "gc/shared/genCollectedHeap.hpp"
#include "jvmtifiles/jvmtiEnv.hpp"
#include "logging/log.hpp"
#include "memory/iterator.hpp"
#include "memory/metadataFactory.hpp"
#include "memory/metaspace/testHelpers.hpp"
#include "memory/metaspaceUtils.hpp"
#include "memory/oopFactory.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
#include "oops/array.hpp"
#include "oops/compressedOops.hpp"
#include "oops/constantPool.inline.hpp"
#include "oops/klass.inline.hpp"
#include "oops/method.inline.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/objArrayOop.inline.hpp"
#include "oops/oop.inline.hpp"
#include "oops/typeArrayOop.inline.hpp"
#include "prims/resolvedMethodTable.hpp"
#include "prims/wbtestmethods/parserTests.hpp"
#include "prims/whitebox.inline.hpp"
#include "runtime/arguments.hpp"
#include "runtime/atomic.hpp"
#include "runtime/deoptimization.hpp"
#include "runtime/fieldDescriptor.inline.hpp"
#include "runtime/flags/jvmFlag.hpp"
#include "runtime/flags/jvmFlagAccess.hpp"
#include "runtime/frame.inline.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/handshake.hpp"
#include "runtime/interfaceSupport.inline.hpp"
#include "runtime/javaCalls.hpp"
#include "runtime/jniHandles.inline.hpp"
#include "runtime/os.hpp"
#include "runtime/stackFrameStream.inline.hpp"
#include "runtime/sweeper.hpp"
#include "runtime/synchronizer.hpp"
#include "runtime/thread.hpp"
#include "runtime/threadSMR.hpp"
#include "runtime/vframe.hpp"
#include "runtime/vm_version.hpp"
#include "services/memoryService.hpp"
#include "utilities/align.hpp"
#include "utilities/debug.hpp"
#include "utilities/elfFile.hpp"
#include "utilities/exceptions.hpp"
#include "utilities/macros.hpp"
#include "utilities/ostream.hpp"
#if INCLUDE_G1GC
#include "gc/g1/g1Arguments.hpp"
#include "gc/g1/g1CollectedHeap.inline.hpp"
#include "gc/g1/g1ConcurrentMark.hpp"
#include "gc/g1/g1ConcurrentMarkThread.inline.hpp"
#include "gc/g1/heapRegionManager.hpp"
#include "gc/g1/heapRegionRemSet.inline.hpp"
#endif // INCLUDE_G1GC
#if INCLUDE_PARALLELGC
#include "gc/parallel/parallelScavengeHeap.inline.hpp"
#endif // INCLUDE_PARALLELGC
#if INCLUDE_NMT
#include "services/mallocSiteTable.hpp"
#include "services/memTracker.hpp"
#include "utilities/nativeCallStack.hpp"
#endif // INCLUDE_NMT
#if INCLUDE_JVMCI
#include "jvmci/jvmciEnv.hpp"
#include "jvmci/jvmciRuntime.hpp"
#endif
#ifdef LINUX
#include "osContainer_linux.hpp"
#include "cgroupSubsystem_linux.hpp"
#endif
#define SIZE_T_MAX_VALUE ((size_t) -1)
#define CHECK_JNI_EXCEPTION_(env, value) \
do { \
JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
THREAD->clear_pending_jni_exception_check(); \
if (HAS_PENDING_EXCEPTION) { \
return(value); \
} \
} while (0)
#define CHECK_JNI_EXCEPTION(env) \
do { \
JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
THREAD->clear_pending_jni_exception_check(); \
if (HAS_PENDING_EXCEPTION) { \
return; \
} \
} while (0)
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 LockedClassesDo {
Symbol* _name;
int _count;
public:
WBIsKlassAliveClosure(Symbol* name) : _name(name), _count(0) {}
void do_klass(Klass* k) {
Symbol* ksym = k->name();
if (ksym->fast_compare(_name) == 0) {
_count++;
} else if (k->is_instance_klass()) {
// Need special handling for hidden classes because the JVM
// appends "+<hex-address>" to hidden class names.
InstanceKlass *ik = InstanceKlass::cast(k);
if (ik->is_hidden()) {
ResourceMark rm;
char* k_name = ksym->as_C_string();
// Find the first '+' char and truncate the string at that point.
// NOTE: This will not work correctly if the original hidden class
// name contains a '+'.
char* plus_char = strchr(k_name, '+');
if (plus_char != NULL) {
*plus_char = 0;
char* c_name = _name->as_C_string();
if (strcmp(c_name, k_name) == 0) {
_count++;
}
}
}
}
}
int count() const {
return _count;
}
};
WB_ENTRY(jint, WB_CountAliveClasses(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);
TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
WBIsKlassAliveClosure closure(sym);
ClassLoaderDataGraph::classes_do(&closure);
// Return the count of alive classes with this name.
return closure.count();
WB_END
WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
oop h_name = JNIHandles::resolve(name);
if (h_name == NULL) return false;
Symbol* sym = java_lang_String::as_symbol(h_name);
TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
return (jint)sym->refcount();
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)) {
tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap " SIZE_FORMAT " "
"Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
MinHeapSize,
InitialHeapSize,
MaxHeapSize,
SpaceAlignment,
HeapAlignment);
}
WB_END
WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
size_t granularity = os::vm_allocation_granularity();
ReservedHeapSpace rhs(100 * granularity, granularity, os::vm_page_size());
VirtualSpace vs;
vs.initialize(rhs, 50 * granularity);
// Check if constraints are complied
if (!( UseCompressedOops && rhs.base() != NULL &&
CompressedOops::base() != NULL &&
CompressedOops::use_implicit_null_checks() )) {
tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
"\tUseCompressedOops is %d\n"
"\trhs.base() is " PTR_FORMAT "\n"
"\tCompressedOops::base() is " PTR_FORMAT "\n"
"\tCompressedOops::use_implicit_null_checks() is %d",
UseCompressedOops,
p2i(rhs.base()),
p2i(CompressedOops::base()),
CompressedOops::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, os::vm_page_size());
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);
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
WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
return GCConfig::is_gc_supported((CollectedHeap::Name)name);
WB_END
WB_ENTRY(jboolean, WB_IsGCSupportedByJVMCICompiler(JNIEnv* env, jobject o, jint name))
#if INCLUDE_JVMCI
if (EnableJVMCI) {
JVMCIEnv jvmciEnv(thread, env, __FILE__, __LINE__);
return jvmciEnv.runtime()->is_gc_supported(&jvmciEnv, (CollectedHeap::Name)name);
}
#endif
return false;
WB_END
WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
return GCConfig::is_gc_selected((CollectedHeap::Name)name);
WB_END
WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
return GCConfig::is_gc_selected_ergonomically();
WB_END
WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
oop p = JNIHandles::resolve(obj);
#if INCLUDE_G1GC
if (UseG1GC) {
G1CollectedHeap* g1h = G1CollectedHeap::heap();
const HeapRegion* hr = g1h->heap_region_containing(p);
if (hr == NULL) {
return false;
}
return !(hr->is_young());
}
#endif
#if INCLUDE_PARALLELGC
if (UseParallelGC) {
ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
return !psh->is_in_young(p);
}
#endif
#if INCLUDE_ZGC
if (UseZGC) {
return Universe::heap()->is_in(p);
}
#endif
#if INCLUDE_SHENANDOAHGC
if (UseShenandoahGC) {
return Universe::heap()->is_in(p);
}
#endif
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))
return (jlong)SpaceAlignment;
WB_END
WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
return (jlong)HeapAlignment;
WB_END
WB_ENTRY(jboolean, WB_SupportsConcurrentGCBreakpoints(JNIEnv* env, jobject o))
return Universe::heap()->supports_concurrent_gc_breakpoints();
WB_END
WB_ENTRY(void, WB_ConcurrentGCAcquireControl(JNIEnv* env, jobject o))
ConcurrentGCBreakpoints::acquire_control();
WB_END
WB_ENTRY(void, WB_ConcurrentGCReleaseControl(JNIEnv* env, jobject o))
ConcurrentGCBreakpoints::release_control();
WB_END
WB_ENTRY(void, WB_ConcurrentGCRunToIdle(JNIEnv* env, jobject o))
ConcurrentGCBreakpoints::run_to_idle();
WB_END
WB_ENTRY(jboolean, WB_ConcurrentGCRunTo(JNIEnv* env, jobject o, jobject at))
Handle h_name(THREAD, JNIHandles::resolve(at));
ResourceMark rm;
const char* c_name = java_lang_String::as_utf8_string(h_name());
return ConcurrentGCBreakpoints::run_to(c_name);
WB_END
#if INCLUDE_G1GC
WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
if (UseG1GC) {
G1CollectedHeap* g1h = G1CollectedHeap::heap();
oop result = JNIHandles::resolve(obj);
const HeapRegion* hr = g1h->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* g1h = G1CollectedHeap::heap();
const HeapRegion* hr = g1h->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* g1h = G1CollectedHeap::heap();
const HeapRegion* hr = g1h->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* g1h = G1CollectedHeap::heap();
size_t nr = g1h->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* g1h = G1CollectedHeap::heap();
size_t nr = g1h->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()->in_progress();
}
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()->in_progress()) {
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(jboolean, WB_G1HasRegionsToUncommit(JNIEnv* env, jobject o))
if (UseG1GC) {
return G1CollectedHeap::heap()->has_uncommittable_regions();
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1HasRegionsToUncommit: G1 GC is not enabled");
WB_END
#endif // INCLUDE_G1GC
#if INCLUDE_PARALLELGC
WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
if (UseParallelGC) {
return GenAlignment;
}
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 (UseParallelGC) {
return GenAlignment;
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
WB_END
#endif // INCLUDE_PARALLELGC
#if INCLUDE_G1GC
WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
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(THREAD, h());
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
WB_END
WB_ENTRY(jint, WB_G1ActiveMemoryNodeCount(JNIEnv* env, jobject o))
if (UseG1GC) {
G1NUMA* numa = G1NUMA::numa();
return (jint)numa->num_active_nodes();
}
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1ActiveMemoryNodeCount: G1 GC is not enabled");
WB_END
WB_ENTRY(jintArray, WB_G1MemoryNodeIds(JNIEnv* env, jobject o))
if (UseG1GC) {
G1NUMA* numa = G1NUMA::numa();
int num_node_ids = (int)numa->num_active_nodes();
const int* node_ids = numa->node_ids();
typeArrayOop result = oopFactory::new_intArray(num_node_ids, CHECK_NULL);
for (int i = 0; i < num_node_ids; i++) {
result->int_at_put(i, (jint)node_ids[i]);
}
return (jintArray) JNIHandles::make_local(THREAD, result);
}
THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1MemoryNodeIds: 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(THREAD, result);
WB_END
#endif // INCLUDE_G1GC
#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
// Alloc memory with pseudo call stack and specific memory type.
WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint type))
address pc = (address)(size_t)pseudo_stack;
NativeCallStack stack(&pc, 1);
return (jlong)(uintptr_t)os::malloc(size, (MEMFLAGS)type, 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(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
addr = (jlong)(uintptr_t)os::attempt_reserve_memory_at((char*)(uintptr_t)addr, (size_t)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
WB_ENTRY(jlong, WB_NMTNewArena(JNIEnv* env, jobject o, jlong init_size))
Arena* arena = new (mtTest) Arena(mtTest, size_t(init_size));
return (jlong)arena;
WB_END
WB_ENTRY(void, WB_NMTFreeArena(JNIEnv* env, jobject o, jlong arena))
Arena* a = (Arena*)arena;
delete a;
WB_END
WB_ENTRY(void, WB_NMTArenaMalloc(JNIEnv* env, jobject o, jlong arena, jlong size))
Arena* a = (Arena*)arena;
a->Amalloc(size_t(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, false /* update */, true /* process_frames */); !fst.is_done(); fst.next()) {
frame* f = fst.current();
if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
Deoptimization::deoptimize(t, *f);
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(jboolean, WB_IsFrameDeoptimized(JNIEnv* env, jobject o, jint depth))
bool result = false;
if (thread->has_last_Java_frame()) {
RegisterMap reg_map(thread);
javaVFrame *jvf = thread->last_java_vframe(®_map);
for (jint d = 0; d < depth && jvf != NULL; d++) {
jvf = jvf->java_sender();
}
result = jvf != NULL && jvf->fr().is_deoptimized_frame();
}
return result;
WB_END
WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
CodeCache::mark_all_nmethods_for_deoptimization();
Deoptimization::deoptimize_all_marked();
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);
MutexLocker 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) {
Deoptimization::deoptimize_all_marked();
}
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);
MutexLocker 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
static bool is_excluded_for_compiler(AbstractCompiler* comp, methodHandle& mh) {
if (comp == NULL) {
return true;
}
DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
if (directive->ExcludeOption) {
return true;
}
return false;
}
static bool can_be_compiled_at_level(methodHandle& mh, jboolean is_osr, int level) {
if (is_osr) {
return CompilationPolicy::can_be_osr_compiled(mh, level);
} else {
return CompilationPolicy::can_be_compiled(mh, level);
}
}
WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
if (method == NULL || comp_level > CompilationPolicy::highest_compile_level()) {
return false;
}
jmethodID jmid = reflected_method_to_jmid(thread, env, method);
CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
MutexLocker mu(Compile_lock);
methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
// The ExcludeOption directive is evaluated lazily upon compilation attempt. If a method was not tried to be compiled by
// a compiler, yet, the method object is not set to be not compilable by that compiler. Thus, evaluate the compiler directive
// to exclude a compilation of 'method'.
if (comp_level == CompLevel_any) {
// Both compilers could have ExcludeOption set. Check all combinations.
bool excluded_c1 = is_excluded_for_compiler(CompileBroker::compiler1(), mh);
bool excluded_c2 = is_excluded_for_compiler(CompileBroker::compiler2(), mh);
if (excluded_c1 && excluded_c2) {
// Compilation of 'method' excluded by both compilers.
return false;
}
if (excluded_c1) {
// C1 only has ExcludeOption set: Check if compilable with C2.
return can_be_compiled_at_level(mh, is_osr, CompLevel_full_optimization);
} else if (excluded_c2) {
// C2 only has ExcludeOption set: Check if compilable with C1.
return can_be_compiled_at_level(mh, is_osr, CompLevel_simple);
}
} else if (comp_level > CompLevel_none && is_excluded_for_compiler(CompileBroker::compiler((int)comp_level), mh)) {
// Compilation of 'method' excluded by compiler used for 'comp_level'.
return false;
}
return can_be_compiled_at_level(mh, is_osr, (int)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);
MutexLocker 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 > CompilationPolicy::highest_compile_level()) {
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("WhiteBox", comp_level);
} else {
mh->set_not_compilable("WhiteBox", comp_level);
}
WB_END
WB_ENTRY(jint, WB_GetMethodDecompileCount(JNIEnv* env, jobject o, 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));
uint cnt = 0;
MethodData* mdo = mh->method_data();
if (mdo != NULL) {
cnt = mdo->decompile_count();
}
return cnt;
WB_END
// Get the trap count of a method for a specific reason. If the trap count for
// that reason did overflow, this includes the overflow trap count of the method.
// If 'reason' is NULL, the sum of the traps for all reasons will be returned.
// This number includes the overflow trap count if the trap count for any reason
// did overflow.
WB_ENTRY(jint, WB_GetMethodTrapCount(JNIEnv* env, jobject o, jobject method, jstring reason_obj))
jmethodID jmid = reflected_method_to_jmid(thread, env, method);
CHECK_JNI_EXCEPTION_(env, 0);
methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
uint cnt = 0;
MethodData* mdo = mh->method_data();
if (mdo != NULL) {
ResourceMark rm(THREAD);
char* reason_str = (reason_obj == NULL) ?
NULL : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
bool overflow = false;
for (uint reason = 0; reason < mdo->trap_reason_limit(); reason++) {
if (reason_str != NULL && !strcmp(reason_str, Deoptimization::trap_reason_name(reason))) {
cnt = mdo->trap_count(reason);
// Count in the overflow trap count on overflow
if (cnt == (uint)-1) {
cnt = mdo->trap_count_limit() + mdo->overflow_trap_count();
}
break;
} else if (reason_str == NULL) {
uint c = mdo->trap_count(reason);
if (c == (uint)-1) {
c = mdo->trap_count_limit();
if (!overflow) {
// Count overflow trap count just once
overflow = true;