JDK14/Java14源码在线阅读
/*
* Copyright (c) 2012, 2019, 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 "classfile/symbolTable.hpp"
#include "compiler/compileBroker.hpp"
#include "jvmci/jniAccessMark.inline.hpp"
#include "jvmci/jvmciCompilerToVM.hpp"
#include "jvmci/jvmciRuntime.hpp"
#include "logging/log.hpp"
#include "memory/oopFactory.hpp"
#include "memory/universe.hpp"
#include "oops/constantPool.inline.hpp"
#include "oops/method.inline.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/atomic.hpp"
#include "runtime/biasedLocking.hpp"
#include "runtime/deoptimization.hpp"
#include "runtime/fieldDescriptor.inline.hpp"
#include "runtime/frame.inline.hpp"
#include "runtime/sharedRuntime.hpp"
#if INCLUDE_G1GC
#include "gc/g1/g1ThreadLocalData.hpp"
#endif // INCLUDE_G1GC
// Simple helper to see if the caller of a runtime stub which
// entered the VM has been deoptimized
static bool caller_is_deopted() {
JavaThread* thread = JavaThread::current();
RegisterMap reg_map(thread, false);
frame runtime_frame = thread->last_frame();
frame caller_frame = runtime_frame.sender(®_map);
assert(caller_frame.is_compiled_frame(), "must be compiled");
return caller_frame.is_deoptimized_frame();
}
// Stress deoptimization
static void deopt_caller() {
if ( !caller_is_deopted()) {
JavaThread* thread = JavaThread::current();
RegisterMap reg_map(thread, false);
frame runtime_frame = thread->last_frame();
frame caller_frame = runtime_frame.sender(®_map);
Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
assert(caller_is_deopted(), "Must be deoptimized");
}
}
// Manages a scope for a JVMCI runtime call that attempts a heap allocation.
// If there is a pending exception upon closing the scope and the runtime
// call is of the variety where allocation failure returns NULL without an
// exception, the following action is taken:
// 1. The pending exception is cleared
// 2. NULL is written to JavaThread::_vm_result
// 3. Checks that an OutOfMemoryError is Universe::out_of_memory_error_retry().
class RetryableAllocationMark: public StackObj {
private:
JavaThread* _thread;
public:
RetryableAllocationMark(JavaThread* thread, bool activate) {
if (activate) {
assert(!thread->in_retryable_allocation(), "retryable allocation scope is non-reentrant");
_thread = thread;
_thread->set_in_retryable_allocation(true);
} else {
_thread = NULL;
}
}
~RetryableAllocationMark() {
if (_thread != NULL) {
_thread->set_in_retryable_allocation(false);
JavaThread* THREAD = _thread;
if (HAS_PENDING_EXCEPTION) {
oop ex = PENDING_EXCEPTION;
CLEAR_PENDING_EXCEPTION;
oop retry_oome = Universe::out_of_memory_error_retry();
if (ex->is_a(retry_oome->klass()) && retry_oome != ex) {
ResourceMark rm;
fatal("Unexpected exception in scope of retryable allocation: " INTPTR_FORMAT " of type %s", p2i(ex), ex->klass()->external_name());
}
_thread->set_vm_result(NULL);
}
}
}
};
JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance_common(JavaThread* thread, Klass* klass, bool null_on_fail))
JRT_BLOCK;
assert(klass->is_klass(), "not a class");
Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
InstanceKlass* h = InstanceKlass::cast(klass);
{
RetryableAllocationMark ram(thread, null_on_fail);
h->check_valid_for_instantiation(true, CHECK);
oop obj;
if (null_on_fail) {
if (!h->is_initialized()) {
// Cannot re-execute class initialization without side effects
// so return without attempting the initialization
return;
}
} else {
// make sure klass is initialized
h->initialize(CHECK);
}
// allocate instance and return via TLS
obj = h->allocate_instance(CHECK);
thread->set_vm_result(obj);
}
JRT_BLOCK_END;
SharedRuntime::on_slowpath_allocation_exit(thread);
JRT_END
JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array_common(JavaThread* thread, Klass* array_klass, jint length, bool null_on_fail))
JRT_BLOCK;
// Note: no handle for klass needed since they are not used
// anymore after new_objArray() and no GC can happen before.
// (This may have to change if this code changes!)
assert(array_klass->is_klass(), "not a class");
oop obj;
if (array_klass->is_typeArray_klass()) {
BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
RetryableAllocationMark ram(thread, null_on_fail);
obj = oopFactory::new_typeArray(elt_type, length, CHECK);
} else {
Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive
Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
RetryableAllocationMark ram(thread, null_on_fail);
obj = oopFactory::new_objArray(elem_klass, length, CHECK);
}
thread->set_vm_result(obj);
// This is pretty rare but this runtime patch is stressful to deoptimization
// if we deoptimize here so force a deopt to stress the path.
if (DeoptimizeALot) {
static int deopts = 0;
// Alternate between deoptimizing and raising an error (which will also cause a deopt)
if (deopts++ % 2 == 0) {
if (null_on_fail) {
return;
} else {
ResourceMark rm(THREAD);
THROW(vmSymbols::java_lang_OutOfMemoryError());
}
} else {
deopt_caller();
}
}
JRT_BLOCK_END;
SharedRuntime::on_slowpath_allocation_exit(thread);
JRT_END
JRT_ENTRY(void, JVMCIRuntime::new_multi_array_common(JavaThread* thread, Klass* klass, int rank, jint* dims, bool null_on_fail))
assert(klass->is_klass(), "not a class");
assert(rank >= 1, "rank must be nonzero");
Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
RetryableAllocationMark ram(thread, null_on_fail);
oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
thread->set_vm_result(obj);
JRT_END
JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array_common(JavaThread* thread, oopDesc* element_mirror, jint length, bool null_on_fail))
RetryableAllocationMark ram(thread, null_on_fail);
oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
thread->set_vm_result(obj);
JRT_END
JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance_common(JavaThread* thread, oopDesc* type_mirror, bool null_on_fail))
InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(type_mirror));
if (klass == NULL) {
ResourceMark rm(THREAD);
THROW(vmSymbols::java_lang_InstantiationException());
}
RetryableAllocationMark ram(thread, null_on_fail);
// Create new instance (the receiver)
klass->check_valid_for_instantiation(false, CHECK);
if (null_on_fail) {
if (!klass->is_initialized()) {
// Cannot re-execute class initialization without side effects
// so return without attempting the initialization
return;
}
} else {
// Make sure klass gets initialized
klass->initialize(CHECK);
}
oop obj = klass->allocate_instance(CHECK);
thread->set_vm_result(obj);
JRT_END
extern void vm_exit(int code);
// Enter this method from compiled code handler below. This is where we transition
// to VM mode. This is done as a helper routine so that the method called directly
// from compiled code does not have to transition to VM. This allows the entry
// method to see if the nmethod that we have just looked up a handler for has
// been deoptimized while we were in the vm. This simplifies the assembly code
// cpu directories.
//
// We are entering here from exception stub (via the entry method below)
// If there is a compiled exception handler in this method, we will continue there;
// otherwise we will unwind the stack and continue at the caller of top frame method
// Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
// control the area where we can allow a safepoint. After we exit the safepoint area we can
// check to see if the handler we are going to return is now in a nmethod that has
// been deoptimized. If that is the case we return the deopt blob
// unpack_with_exception entry instead. This makes life for the exception blob easier
// because making that same check and diverting is painful from assembly language.
JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, CompiledMethod*& cm))
// Reset method handle flag.
thread->set_is_method_handle_return(false);
Handle exception(thread, ex);
cm = CodeCache::find_compiled(pc);
assert(cm != NULL, "this is not a compiled method");
// Adjust the pc as needed/
if (cm->is_deopt_pc(pc)) {
RegisterMap map(thread, false);
frame exception_frame = thread->last_frame().sender(&map);
// if the frame isn't deopted then pc must not correspond to the caller of last_frame
assert(exception_frame.is_deoptimized_frame(), "must be deopted");
pc = exception_frame.pc();
}
#ifdef ASSERT
assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
assert(oopDesc::is_oop(exception()), "just checking");
// Check that exception is a subclass of Throwable, otherwise we have a VerifyError
if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
if (ExitVMOnVerifyError) vm_exit(-1);
ShouldNotReachHere();
}
#endif
// Check the stack guard pages and reenable them if necessary and there is
// enough space on the stack to do so. Use fast exceptions only if the guard
// pages are enabled.
bool guard_pages_enabled = thread->stack_guards_enabled();
if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
if (JvmtiExport::can_post_on_exceptions()) {
// To ensure correct notification of exception catches and throws
// we have to deoptimize here. If we attempted to notify the
// catches and throws during this exception lookup it's possible
// we could deoptimize on the way out of the VM and end back in
// the interpreter at the throw site. This would result in double
// notifications since the interpreter would also notify about
// these same catches and throws as it unwound the frame.
RegisterMap reg_map(thread);
frame stub_frame = thread->last_frame();
frame caller_frame = stub_frame.sender(®_map);
// We don't really want to deoptimize the nmethod itself since we
// can actually continue in the exception handler ourselves but I
// don't see an easy way to have the desired effect.
Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
assert(caller_is_deopted(), "Must be deoptimized");
return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
}
// ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
if (guard_pages_enabled) {
address fast_continuation = cm->handler_for_exception_and_pc(exception, pc);
if (fast_continuation != NULL) {
// Set flag if return address is a method handle call site.
thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
return fast_continuation;
}
}
// If the stack guard pages are enabled, check whether there is a handler in
// the current method. Otherwise (guard pages disabled), force an unwind and
// skip the exception cache update (i.e., just leave continuation==NULL).
address continuation = NULL;
if (guard_pages_enabled) {
// New exception handling mechanism can support inlined methods
// with exception handlers since the mappings are from PC to PC
// debugging support
// tracing
if (log_is_enabled(Info, exceptions)) {
ResourceMark rm;
stringStream tempst;
assert(cm->method() != NULL, "Unexpected null method()");
tempst.print("compiled method <%s>\n"
" at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
cm->method()->print_value_string(), p2i(pc), p2i(thread));
Exceptions::log_exception(exception, tempst.as_string());
}
// for AbortVMOnException flag
NOT_PRODUCT(Exceptions::debug_check_abort(exception));
// Clear out the exception oop and pc since looking up an
// exception handler can cause class loading, which might throw an
// exception and those fields are expected to be clear during
// normal bytecode execution.
thread->clear_exception_oop_and_pc();
bool recursive_exception = false;
continuation = SharedRuntime::compute_compiled_exc_handler(cm, pc, exception, false, false, recursive_exception);
// If an exception was thrown during exception dispatch, the exception oop may have changed
thread->set_exception_oop(exception());
thread->set_exception_pc(pc);
// The exception cache is used only for non-implicit exceptions
// Update the exception cache only when another exception did
// occur during the computation of the compiled exception handler
// (e.g., when loading the class of the catch type).
// Checking for exception oop equality is not
// sufficient because some exceptions are pre-allocated and reused.
if (continuation != NULL && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) {
cm->add_handler_for_exception_and_pc(exception, pc, continuation);
}
}
// Set flag if return address is a method handle call site.
thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
if (log_is_enabled(Info, exceptions)) {
ResourceMark rm;
log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
" for exception thrown at PC " PTR_FORMAT,
p2i(thread), p2i(continuation), p2i(pc));
}
return continuation;
JRT_END
// Enter this method from compiled code only if there is a Java exception handler
// in the method handling the exception.
// We are entering here from exception stub. We don't do a normal VM transition here.
// We do it in a helper. This is so we can check to see if the nmethod we have just
// searched for an exception handler has been deoptimized in the meantime.
address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
oop exception = thread->exception_oop();
address pc = thread->exception_pc();
// Still in Java mode
DEBUG_ONLY(ResetNoHandleMark rnhm);
CompiledMethod* cm = NULL;
address continuation = NULL;
{
// Enter VM mode by calling the helper
ResetNoHandleMark rnhm;
continuation = exception_handler_for_pc_helper(thread, exception, pc, cm);
}
// Back in JAVA, use no oops DON'T safepoint
// Now check to see if the compiled method we were called from is now deoptimized.
// If so we must return to the deopt blob and deoptimize the nmethod
if (cm != NULL && caller_is_deopted()) {
continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
}
assert(continuation != NULL, "no handler found");
return continuation;
}
JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
IF_TRACE_jvmci_3 {
char type[O_BUFLEN];
obj->klass()->name()->as_C_string(type, O_BUFLEN);
markWord mark = obj->mark();
TRACE_jvmci_3("%s: entered locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), p2i(obj), type, mark.value(), p2i(lock));
tty->flush();
}
if (PrintBiasedLockingStatistics) {
Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
}
Handle h_obj(thread, obj);
assert(oopDesc::is_oop(h_obj()), "must be NULL or an object");
ObjectSynchronizer::enter(h_obj, lock, THREAD);
TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
JRT_END
JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
assert(thread == JavaThread::current(), "threads must correspond");
assert(thread->last_Java_sp(), "last_Java_sp must be set");
// monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
EXCEPTION_MARK;
#ifdef ASSERT
if (!oopDesc::is_oop(obj)) {
ResetNoHandleMark rhm;
nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
if (method != NULL) {
tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
}
thread->print_stack_on(tty);
assert(false, "invalid lock object pointer dected");
}
#endif
ObjectSynchronizer::exit(obj, lock, THREAD);
IF_TRACE_jvmci_3 {
char type[O_BUFLEN];
obj->klass()->name()->as_C_string(type, O_BUFLEN);
TRACE_jvmci_3("%s: exited locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), p2i(obj), type, obj->mark().value(), p2i(lock));
tty->flush();
}
JRT_END
// Object.notify() fast path, caller does slow path
JRT_LEAF(jboolean, JVMCIRuntime::object_notify(JavaThread *thread, oopDesc* obj))
// Very few notify/notifyAll operations find any threads on the waitset, so
// the dominant fast-path is to simply return.
// Relatedly, it's critical that notify/notifyAll be fast in order to
// reduce lock hold times.
if (!SafepointSynchronize::is_synchronizing()) {
if (ObjectSynchronizer::quick_notify(obj, thread, false)) {
return true;
}
}
return false; // caller must perform slow path
JRT_END
// Object.notifyAll() fast path, caller does slow path
JRT_LEAF(jboolean, JVMCIRuntime::object_notifyAll(JavaThread *thread, oopDesc* obj))
if (!SafepointSynchronize::is_synchronizing() ) {
if (ObjectSynchronizer::quick_notify(obj, thread, true)) {
return true;
}
}
return false; // caller must perform slow path
JRT_END
JRT_BLOCK_ENTRY(int, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* thread, const char* exception, const char* message))
JRT_BLOCK;
TempNewSymbol symbol = SymbolTable::new_symbol(exception);
SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
JRT_BLOCK_END;
return caller_is_deopted();
JRT_END
JRT_BLOCK_ENTRY(int, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* thread, const char* exception, Klass* klass))
JRT_BLOCK;
ResourceMark rm(thread);
TempNewSymbol symbol = SymbolTable::new_symbol(exception);
SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, klass->external_name());
JRT_BLOCK_END;
return caller_is_deopted();
JRT_END
JRT_BLOCK_ENTRY(int, JVMCIRuntime::throw_class_cast_exception(JavaThread* thread, const char* exception, Klass* caster_klass, Klass* target_klass))
JRT_BLOCK;
ResourceMark rm(thread);
const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass);
TempNewSymbol symbol = SymbolTable::new_symbol(exception);
SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
JRT_BLOCK_END;
return caller_is_deopted();
JRT_END
JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
ttyLocker ttyl;
if (obj == NULL) {
tty->print("NULL");
} else if (oopDesc::is_oop_or_null(obj, true) && (!as_string || !java_lang_String::is_instance(obj))) {
if (oopDesc::is_oop_or_null(obj, true)) {
char buf[O_BUFLEN];
tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
} else {
tty->print(INTPTR_FORMAT, p2i(obj));
}
} else {
ResourceMark rm;
assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
char *buf = java_lang_String::as_utf8_string(obj);
tty->print_raw(buf);
}
if (newline) {
tty->cr();
}
JRT_END
#if INCLUDE_G1GC
JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
G1ThreadLocalData::satb_mark_queue(thread).enqueue(obj);
JRT_END
JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
G1ThreadLocalData::dirty_card_queue(thread).enqueue(card_addr);
JRT_END
#endif // INCLUDE_G1GC
JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
bool ret = true;
if(!Universe::heap()->is_in(parent)) {
tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
parent->print();
ret=false;
}
if(!Universe::heap()->is_in(child)) {
tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
child->print();
ret=false;
}
return (jint)ret;
JRT_END
JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
ResourceMark rm;
const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
char *detail_msg = NULL;
if (format != 0L) {
const char* buf = (char*) (address) format;
size_t detail_msg_length = strlen(buf) * 2;
detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
jio_snprintf(detail_msg, detail_msg_length, buf, value);
}
report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
JRT_END
JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
oop exception = thread->exception_oop();
assert(exception != NULL, "npe");
thread->set_exception_oop(NULL);
thread->set_exception_pc(0);
return exception;
JRT_END
PRAGMA_DIAG_PUSH
PRAGMA_FORMAT_NONLITERAL_IGNORED
JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, const char* format, jlong v1, jlong v2, jlong v3))
ResourceMark rm;
tty->print(format, v1, v2, v3);
JRT_END
PRAGMA_DIAG_POP
static void decipher(jlong v, bool ignoreZero) {
if (v != 0 || !ignoreZero) {
void* p = (void *)(address) v;
CodeBlob* cb = CodeCache::find_blob(p);
if (cb) {
if (cb->is_nmethod()) {
char buf[O_BUFLEN];
tty->print("%s [" INTPTR_FORMAT "+" JLONG_FORMAT "]", cb->as_nmethod_or_null()->method()->name_and_sig_as_C_string(buf, O_BUFLEN), p2i(cb->code_begin()), (jlong)((address)v - cb->code_begin()));
return;
}
cb->print_value_on(tty);
return;
}
if (Universe::heap()->is_in(p)) {
oop obj = oop(p);
obj->print_value_on(tty);
return;
}
tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
}
}
PRAGMA_DIAG_PUSH
PRAGMA_FORMAT_NONLITERAL_IGNORED
JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
ResourceMark rm;
const char *buf = (const char*) (address) format;
if (vmError) {
if (buf != NULL) {
fatal(buf, v1, v2, v3);
} else {
fatal("<anonymous error>");
}
} else if (buf != NULL) {
tty->print(buf, v1, v2, v3);
} else {
assert(v2 == 0, "v2 != 0");
assert(v3 == 0, "v3 != 0");
decipher(v1, false);
}
JRT_END
PRAGMA_DIAG_POP
JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
union {
jlong l;
jdouble d;
jfloat f;
} uu;
uu.l = value;
switch (typeChar) {
case 'Z': tty->print(value == 0 ? "false" : "true"); break;
case 'B': tty->print("%d", (jbyte) value); break;
case 'C': tty->print("%c", (jchar) value); break;
case 'S': tty->print("%d", (jshort) value); break;
case 'I': tty->print("%d", (jint) value); break;
case 'F': tty->print("%f", uu.f); break;
case 'J': tty->print(JLONG_FORMAT, value); break;
case 'D': tty->print("%lf", uu.d); break;
default: assert(false, "unknown typeChar"); break;
}
if (newline) {
tty->cr();
}
JRT_END
JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
return (jint) obj->identity_hash();
JRT_END
JRT_ENTRY(jint, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
deopt_caller();
return (jint) value;
JRT_END
// private static JVMCIRuntime JVMCI.initializeRuntime()
JVM_ENTRY_NO_ENV(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
JNI_JVMCIENV(thread, env);
if (!EnableJVMCI) {
JVMCI_THROW_MSG_NULL(InternalError, "JVMCI is not enabled");
}
JVMCIENV->runtime()->initialize_HotSpotJVMCIRuntime(JVMCI_CHECK_NULL);
JVMCIObject runtime = JVMCIENV->runtime()->get_HotSpotJVMCIRuntime(JVMCI_CHECK_NULL);
return JVMCIENV->get_jobject(runtime);
JVM_END
void JVMCIRuntime::call_getCompiler(TRAPS) {
THREAD_JVMCIENV(JavaThread::current());
JVMCIObject jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(JVMCI_CHECK);
initialize(JVMCIENV);
JVMCIENV->call_HotSpotJVMCIRuntime_getCompiler(jvmciRuntime, JVMCI_CHECK);
}
void JVMCINMethodData::initialize(
int nmethod_mirror_index,
const char* name,
FailedSpeculation** failed_speculations)
{
_failed_speculations = failed_speculations;
_nmethod_mirror_index = nmethod_mirror_index;
if (name != NULL) {
_has_name = true;
char* dest = (char*) this->name();
strcpy(dest, name);
} else {
_has_name = false;
}
}
void JVMCINMethodData::add_failed_speculation(nmethod* nm, jlong speculation) {
uint index = (speculation >> 32) & 0xFFFFFFFF;
int length = (int) speculation;
if (index + length > (uint) nm->speculations_size()) {
fatal(INTPTR_FORMAT "[index: %d, length: %d] out of bounds wrt encoded speculations of length %u", speculation, index, length, nm->speculations_size());
}
address data = nm->speculations_begin() + index;
FailedSpeculation::add_failed_speculation(nm, _failed_speculations, data, length);
}
oop JVMCINMethodData::get_nmethod_mirror(nmethod* nm, bool phantom_ref) {
if (_nmethod_mirror_index == -1) {
return NULL;
}
if (phantom_ref) {
return nm->oop_at_phantom(_nmethod_mirror_index);
} else {
return nm->oop_at(_nmethod_mirror_index);
}
}
void JVMCINMethodData::set_nmethod_mirror(nmethod* nm, oop new_mirror) {
assert(_nmethod_mirror_index != -1, "cannot set JVMCI mirror for nmethod");
oop* addr = nm->oop_addr_at(_nmethod_mirror_index);
assert(new_mirror != NULL, "use clear_nmethod_mirror to clear the mirror");
assert(*addr == NULL, "cannot overwrite non-null mirror");
*addr = new_mirror;
// Since we've patched some oops in the nmethod,
// (re)register it with the heap.
Universe::heap()->register_nmethod(nm);
}
void JVMCINMethodData::clear_nmethod_mirror(nmethod* nm) {
if (_nmethod_mirror_index != -1) {
oop* addr = nm->oop_addr_at(_nmethod_mirror_index);
*addr = NULL;
}
}
void JVMCINMethodData::invalidate_nmethod_mirror(nmethod* nm) {
oop nmethod_mirror = get_nmethod_mirror(nm, /* phantom_ref */ false);
if (nmethod_mirror == NULL) {
return;
}
// Update the values in the mirror if it still refers to nm.
// We cannot use JVMCIObject to wrap the mirror as this is called
// during GC, forbidding the creation of JNIHandles.
JVMCIEnv* jvmciEnv = NULL;
nmethod* current = (nmethod*) HotSpotJVMCI::InstalledCode::address(jvmciEnv, nmethod_mirror);
if (nm == current) {
if (!nm->is_alive()) {
// Break the link from the mirror to nm such that
// future invocations via the mirror will result in
// an InvalidInstalledCodeException.
HotSpotJVMCI::InstalledCode::set_address(jvmciEnv, nmethod_mirror, 0);
HotSpotJVMCI::InstalledCode::set_entryPoint(jvmciEnv, nmethod_mirror, 0);
} else if (nm->is_not_entrant()) {
// Zero the entry point so any new invocation will fail but keep
// the address link around that so that existing activations can
// be deoptimized via the mirror (i.e. JVMCIEnv::invalidate_installed_code).
HotSpotJVMCI::InstalledCode::set_entryPoint(jvmciEnv, nmethod_mirror, 0);
}
}
}
void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(JVMCI_TRAPS) {
if (is_HotSpotJVMCIRuntime_initialized()) {
if (JVMCIENV->is_hotspot() && UseJVMCINativeLibrary) {
JVMCI_THROW_MSG(InternalError, "JVMCI has already been enabled in the JVMCI shared library");
}
}
initialize(JVMCIENV);
// This should only be called in the context of the JVMCI class being initialized
JVMCIObject result = JVMCIENV->call_HotSpotJVMCIRuntime_runtime(JVMCI_CHECK);
_HotSpotJVMCIRuntime_instance = JVMCIENV->make_global(result);
}
void JVMCIRuntime::initialize(JVMCIEnv* JVMCIENV) {
assert(this != NULL, "sanity");
// Check first without JVMCI_lock
if (_initialized) {
return;
}
MutexLocker locker(JVMCI_lock);
// Check again under JVMCI_lock
if (_initialized) {
return;
}
while (_being_initialized) {
JVMCI_lock->wait();
if (_initialized) {
return;
}
}
_being_initialized = true;
{
MutexUnlocker unlock(JVMCI_lock);
HandleMark hm;
ResourceMark rm;
JavaThread* THREAD = JavaThread::current();
if (JVMCIENV->is_hotspot()) {
HotSpotJVMCI::compute_offsets(CHECK_EXIT);
} else {
JNIAccessMark jni(JVMCIENV);
JNIJVMCI::initialize_ids(jni.env());
if (jni()->ExceptionCheck()) {
jni()->ExceptionDescribe();
fatal("JNI exception during init");
}
}
create_jvmci_primitive_type(T_BOOLEAN, JVMCI_CHECK_EXIT_((void)0));
create_jvmci_primitive_type(T_BYTE, JVMCI_CHECK_EXIT_((void)0));
create_jvmci_primitive_type(T_CHAR, JVMCI_CHECK_EXIT_((void)0));
create_jvmci_primitive_type(T_SHORT, JVMCI_CHECK_EXIT_((void)0));
create_jvmci_primitive_type(T_INT, JVMCI_CHECK_EXIT_((void)0));
create_jvmci_primitive_type(T_LONG, JVMCI_CHECK_EXIT_((void)0));
create_jvmci_primitive_type(T_FLOAT, JVMCI_CHECK_EXIT_((void)0));
create_jvmci_primitive_type(T_DOUBLE, JVMCI_CHECK_EXIT_((void)0));
create_jvmci_primitive_type(T_VOID, JVMCI_CHECK_EXIT_((void)0));
if (!JVMCIENV->is_hotspot()) {
JVMCIENV->copy_saved_properties();
}
}
_initialized = true;
_being_initialized = false;
JVMCI_lock->notify_all();
}
JVMCIObject JVMCIRuntime::create_jvmci_primitive_type(BasicType type, JVMCI_TRAPS) {
Thread* THREAD = Thread::current();
// These primitive types are long lived and are created before the runtime is fully set up
// so skip registering them for scanning.
JVMCIObject mirror = JVMCIENV->get_object_constant(java_lang_Class::primitive_mirror(type), false, true);
if (JVMCIENV->is_hotspot()) {
JavaValue result(T_OBJECT);
JavaCallArguments args;
args.push_oop(Handle(THREAD, HotSpotJVMCI::resolve(mirror)));
args.push_int(type2char(type));
JavaCalls::call_static(&result, HotSpotJVMCI::HotSpotResolvedPrimitiveType::klass(), vmSymbols::fromMetaspace_name(), vmSymbols::primitive_fromMetaspace_signature(), &args, CHECK_(JVMCIObject()));
return JVMCIENV->wrap(JNIHandles::make_local((oop)result.get_jobject()));
} else {
JNIAccessMark jni(JVMCIENV);
jobject result = jni()->CallStaticObjectMethod(JNIJVMCI::HotSpotResolvedPrimitiveType::clazz(),
JNIJVMCI::HotSpotResolvedPrimitiveType_fromMetaspace_method(),
mirror.as_jobject(), type2char(type));
if (jni()->ExceptionCheck()) {
return JVMCIObject();
}
return JVMCIENV->wrap(result);
}
}
void JVMCIRuntime::initialize_JVMCI(JVMCI_TRAPS) {
if (!is_HotSpotJVMCIRuntime_initialized()) {
initialize(JVMCI_CHECK);
JVMCIENV->call_JVMCI_getRuntime(JVMCI_CHECK);
}
}
JVMCIObject JVMCIRuntime::get_HotSpotJVMCIRuntime(JVMCI_TRAPS) {
initialize(JVMCIENV);
initialize_JVMCI(JVMCI_CHECK_(JVMCIObject()));
return _HotSpotJVMCIRuntime_instance;
}
// private void CompilerToVM.registerNatives()
JVM_ENTRY_NO_ENV(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
JNI_JVMCIENV(thread, env);
if (!EnableJVMCI) {
JVMCI_THROW_MSG(InternalError, "JVMCI is not enabled");
}
JVMCIENV->runtime()->initialize(JVMCIENV);
{
ResourceMark rm;
HandleMark hm(thread);
ThreadToNativeFromVM trans(thread);
// Ensure _non_oop_bits is initialized
Universe::non_oop_word();
if (JNI_OK != env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count())) {
if (!env->ExceptionCheck()) {
for (int i = 0; i < CompilerToVM::methods_count(); i++) {
if (JNI_OK != env->RegisterNatives(c2vmClass, CompilerToVM::methods + i, 1)) {
guarantee(false, "Error registering JNI method %s%s", CompilerToVM::methods[i].name, CompilerToVM::methods[i].signature);
break;
}
}
} else {
env->ExceptionDescribe();
}
guarantee(false, "Failed registering CompilerToVM native methods");
}
}
JVM_END
void JVMCIRuntime::shutdown() {
if (is_HotSpotJVMCIRuntime_initialized()) {
_shutdown_called = true;
THREAD_JVMCIENV(JavaThread::current());
JVMCIENV->call_HotSpotJVMCIRuntime_shutdown(_HotSpotJVMCIRuntime_instance);
}
}
void JVMCIRuntime::bootstrap_finished(TRAPS) {
if (is_HotSpotJVMCIRuntime_initialized()) {
THREAD_JVMCIENV(JavaThread::current());
JVMCIENV->call_HotSpotJVMCIRuntime_bootstrapFinished(_HotSpotJVMCIRuntime_instance, JVMCIENV);
}
}
void JVMCIRuntime::describe_pending_hotspot_exception(JavaThread* THREAD, bool clear) {
if (HAS_PENDING_EXCEPTION) {
Handle exception(THREAD, PENDING_EXCEPTION);
const char* exception_file = THREAD->exception_file();
int exception_line = THREAD->exception_line();
CLEAR_PENDING_EXCEPTION;
if (exception->is_a(SystemDictionary::ThreadDeath_klass())) {
// Don't print anything if we are being killed.
} else {
java_lang_Throwable::print_stack_trace(exception, tty);
// Clear and ignore any exceptions raised during printing
CLEAR_PENDING_EXCEPTION;
}
if (!clear) {
THREAD->set_pending_exception(exception(), exception_file, exception_line);
}
}
}
void JVMCIRuntime::exit_on_pending_exception(JVMCIEnv* JVMCIENV, const char* message) {
JavaThread* THREAD = JavaThread::current();
static volatile int report_error = 0;
if (!report_error && Atomic::cmpxchg(&report_error, 0, 1) == 0) {
// Only report an error once
tty->print_raw_cr(message);
if (JVMCIENV != NULL) {
JVMCIENV->describe_pending_exception(true);
} else {
describe_pending_hotspot_exception(THREAD, true);
}
} else {
// Allow error reporting thread to print the stack trace.
THREAD->sleep(200);
}
before_exit(THREAD);
vm_exit(-1);
}
// ------------------------------------------------------------------
// Note: the logic of this method should mirror the logic of
// constantPoolOopDesc::verify_constant_pool_resolve.
bool JVMCIRuntime::check_klass_accessibility(Klass* accessing_klass, Klass* resolved_klass) {
if (accessing_klass->is_objArray_klass()) {
accessing_klass = ObjArrayKlass::cast(accessing_klass)->bottom_klass();
}
if (!accessing_klass->is_instance_klass()) {
return true;
}
if (resolved_klass->is_objArray_klass()) {
// Find the element klass, if this is an array.
resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
}
if (resolved_klass->is_instance_klass()) {
Reflection::VerifyClassAccessResults result =
Reflection::verify_class_access(accessing_klass, InstanceKlass::cast(resolved_klass), true);
return result == Reflection::ACCESS_OK;
}
return true;
}
// ------------------------------------------------------------------
Klass* JVMCIRuntime::get_klass_by_name_impl(Klass*& accessing_klass,
const constantPoolHandle& cpool,
Symbol* sym,
bool require_local) {
JVMCI_EXCEPTION_CONTEXT;
// Now we need to check the SystemDictionary
if (sym->char_at(0) == JVM_SIGNATURE_CLASS &&
sym->char_at(sym->utf8_length()-1) == JVM_SIGNATURE_ENDCLASS) {
// This is a name from a signature. Strip off the trimmings.
// Call recursive to keep scope of strippedsym.
TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1,
sym->utf8_length()-2);
return get_klass_by_name_impl(accessing_klass, cpool, strippedsym, require_local);
}
Handle loader(THREAD, (oop)NULL);
Handle domain(THREAD, (oop)NULL);
if (accessing_klass != NULL) {
loader = Handle(THREAD, accessing_klass->class_loader());
domain = Handle(THREAD, accessing_klass->protection_domain());
}
Klass* found_klass;
{
ttyUnlocker ttyul; // release tty lock to avoid ordering problems
MutexLocker ml(Compile_lock);
if (!require_local) {
found_klass = SystemDictionary::find_constrained_instance_or_array_klass(sym, loader, CHECK_NULL);
} else {
found_klass = SystemDictionary::find_instance_or_array_klass(sym, loader, domain, CHECK_NULL);
}
}
// If we fail to find an array klass, look again for its element type.
// The element type may be available either locally or via constraints.
// In either case, if we can find the element type in the system dictionary,
// we must build an array type around it. The CI requires array klasses
// to be loaded if their element klasses are loaded, except when memory
// is exhausted.
if (sym->char_at(0) == JVM_SIGNATURE_ARRAY &&
(sym->char_at(1) == JVM_SIGNATURE_ARRAY || sym->char_at(1) == JVM_SIGNATURE_CLASS)) {
// We have an unloaded array.
// Build it on the fly if the element class exists.
TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1,
sym->utf8_length()-1);
// Get element Klass recursively.
Klass* elem_klass =
get_klass_by_name_impl(accessing_klass,
cpool,
elem_sym,
require_local);
if (elem_klass != NULL) {
// Now make an array for it
return elem_klass->array_klass(THREAD);
}
}
if (found_klass == NULL && !cpool.is_null() && cpool->has_preresolution()) {
// Look inside the constant pool for pre-resolved class entries.
for (int i = cpool->length() - 1; i >= 1; i--) {
if (cpool->tag_at(i).is_klass()) {
Klass* kls = cpool->resolved_klass_at(i);
if (kls->name() == sym) {
return kls;
}
}
}
}
return found_klass;
}
// ------------------------------------------------------------------
Klass* JVMCIRuntime::get_klass_by_name(Klass* accessing_klass,
Symbol* klass_name,
bool require_local) {
ResourceMark rm;
constantPoolHandle cpool;
return get_klass_by_name_impl(accessing_klass,
cpool,
klass_name,
require_local);
}
// ------------------------------------------------------------------
// Implementation of get_klass_by_index.
Klass* JVMCIRuntime::get_klass_by_index_impl(const constantPoolHandle& cpool,
int index,
bool& is_accessible,
Klass* accessor) {
JVMCI_EXCEPTION_CONTEXT;
Klass* klass = ConstantPool::klass_at_if_loaded(cpool, index);
Symbol* klass_name = NULL;
if (klass == NULL) {
klass_name = cpool->klass_name_at(index);
}
if (klass == NULL) {
// Not found in constant pool. Use the name to do the lookup.
Klass* k = get_klass_by_name_impl(accessor,
cpool,
klass_name,
false);
// Calculate accessibility the hard way.
if (k == NULL) {
is_accessible = false;
} else if (k->class_loader() != accessor->class_loader() &&
get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) {
// Loaded only remotely. Not linked yet.
is_accessible = false;
} else {
// Linked locally, and we must also check public/private, etc.
is_accessible = check_klass_accessibility(accessor, k);
}
if (!is_accessible) {
return NULL;
}
return k;
}
// It is known to be accessible, since it was found in the constant pool.
is_accessible = true;
return klass;
}
// ------------------------------------------------------------------
// Get a klass from the constant pool.
Klass* JVMCIRuntime::get_klass_by_index(const constantPoolHandle& cpool,
int index,
bool& is_accessible,
Klass* accessor) {
ResourceMark rm;
Klass* result = get_klass_by_index_impl(cpool, index, is_accessible, accessor);
return result;
}
// ------------------------------------------------------------------
// Implementation of get_field_by_index.
//
// Implementation note: the results of field lookups are cached
// in the accessor klass.
void JVMCIRuntime::get_field_by_index_impl(InstanceKlass* klass, fieldDescriptor& field_desc,
int index) {
JVMCI_EXCEPTION_CONTEXT;
assert(klass->is_linked(), "must be linked before using its constant-pool");
constantPoolHandle cpool(thread, klass->constants());
// Get the field's name, signature, and type.
Symbol* name = cpool->name_ref_at(index);
int nt_index = cpool->name_and_type_ref_index_at(index);
int sig_index = cpool->signature_ref_index_at(nt_index);
Symbol* signature = cpool->symbol_at(sig_index);
// Get the field's declared holder.
int holder_index = cpool->klass_ref_index_at(index);
bool holder_is_accessible;
Klass* declared_holder = get_klass_by_index(cpool, holder_index,
holder_is_accessible,
klass);
// The declared holder of this field may not have been loaded.
// Bail out with partial field information.
if (!holder_is_accessible) {
return;
}
// Perform the field lookup.
Klass* canonical_holder =
InstanceKlass::cast(declared_holder)->find_field(name, signature, &field_desc);
if (canonical_holder == NULL) {
return;
}
assert(canonical_holder == field_desc.field_holder(), "just checking");
}
// ------------------------------------------------------------------
// Get a field by index from a klass's constant pool.
void JVMCIRuntime::get_field_by_index(InstanceKlass* accessor, fieldDescriptor& fd, int index) {
ResourceMark rm;
return get_field_by_index_impl(accessor, fd, index);
}
// ------------------------------------------------------------------
// Perform an appropriate method lookup based on accessor, holder,
// name, signature, and bytecode.
Method* JVMCIRuntime::lookup_method(InstanceKlass* accessor,
Klass* holder,
Symbol* name,
Symbol* sig,
Bytecodes::Code bc,
constantTag tag) {
// Accessibility checks are performed in JVMCIEnv::get_method_by_index_impl().
assert(check_klass_accessibility(accessor, holder), "holder not accessible");
Method* dest_method;
LinkInfo link_info(holder, name, sig, accessor, LinkInfo::needs_access_check, tag);
switch (bc) {
case Bytecodes::_invokestatic:
dest_method =
LinkResolver::resolve_static_call_or_null(link_info);
break;
case Bytecodes::_invokespecial:
dest_method =
LinkResolver::resolve_special_call_or_null(link_info);
break;
case Bytecodes::_invokeinterface:
dest_method =
LinkResolver::linktime_resolve_interface_method_or_null(link_info);
break;
case Bytecodes::_invokevirtual:
dest_method =
LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
break;
default: ShouldNotReachHere();
}
return dest_method;
}
// ------------------------------------------------------------------
Method* JVMCIRuntime::get_method_by_index_impl(const constantPoolHandle& cpool,
int index, Bytecodes::Code bc,
InstanceKlass* accessor) {
if (bc == Bytecodes::_invokedynamic) {
ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
bool is_resolved = !cpce->is_f1_null();
if (is_resolved) {
// Get the invoker Method* from the constant pool.
// (The appendix argument, if any, will be noted in the method's signature.)
Method* adapter = cpce->f1_as_method();
return adapter;
}
return NULL;
}
int holder_index = cpool->klass_ref_index_at(index);
bool holder_is_accessible;
Klass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
// Get the method's name and signature.
Symbol* name_sym = cpool->name_ref_at(index);
Symbol* sig_sym = cpool->signature_ref_at(index);
if (cpool->has_preresolution()
|| ((holder == SystemDictionary::MethodHandle_klass() || holder == SystemDictionary::VarHandle_klass()) &&
MethodHandles::is_signature_polymorphic_name(holder, name_sym))) {
// Short-circuit lookups for JSR 292-related call sites.
// That is, do not rely only on name-based lookups, because they may fail
// if the names are not resolvable in the boot class loader (7056328).
switch (bc) {
case Bytecodes::_invokevirtual:
case Bytecodes::_invokeinterface:
case Bytecodes::_invokespecial:
case Bytecodes::_invokestatic:
{
Method* m = ConstantPool::method_at_if_loaded(cpool, index);
if (m != NULL) {
return m;
}
}
break;
default:
break;
}
}
if (holder_is_accessible) { // Our declared holder is loaded.
constantTag tag = cpool->tag_ref_at(index);
Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
if (m != NULL) {
// We found the method.
return m;
}
}
// Either the declared holder was not loaded, or the method could
// not be found.
return NULL;
}
// ------------------------------------------------------------------
InstanceKlass* JVMCIRuntime::get_instance_klass_for_declared_method_holder(Klass* method_holder) {
// For the case of <array>.clone(), the method holder can be an ArrayKlass*
// instead of an InstanceKlass*. For that case simply pretend that the
// declared holder is Object.clone since that's where the call will bottom out.
if (method_holder->is_instance_klass()) {
return InstanceKlass::cast(method_holder);
} else if (method_holder->is_array_klass()) {
return SystemDictionary::Object_klass();
} else {
ShouldNotReachHere();
}
return NULL;
}
// ------------------------------------------------------------------
Method* JVMCIRuntime::get_method_by_index(const constantPoolHandle& cpool,
int index, Bytecodes::Code bc,
InstanceKlass* accessor) {
ResourceMark rm;
return get_method_by_index_impl(cpool, index, bc, accessor);
}
// ------------------------------------------------------------------
// Check for changes to the system dictionary during compilation
// class loads, evolution, breakpoints
JVMCI::CodeInstallResult JVMCIRuntime::validate_compile_task_dependencies(Dependencies* dependencies, JVMCICompileState* compile_state, char** failure_detail) {
// If JVMTI capabilities were enabled during compile, the compilation is invalidated.
if (compile_state != NULL && compile_state->jvmti_state_changed()) {
*failure_detail = (char*) "Jvmti state change during compilation invalidated dependencies";
return JVMCI::dependencies_failed;
}
CompileTask* task = compile_state == NULL ? NULL : compile_state->task();
Dependencies::DepType result = dependencies->validate_dependencies(task, failure_detail);
if (result == Dependencies::end_marker) {
return JVMCI::ok;
}
return JVMCI::dependencies_failed;
}
// Reports a pending exception and exits the VM.
static void fatal_exception_in_compile(JVMCIEnv* JVMCIENV, JavaThread* thread, const char* msg) {
// Only report a fatal JVMCI compilation exception once
static volatile int report_init_failure = 0;
if (!report_init_failure && Atomic::cmpxchg(&report_init_failure, 0, 1) == 0) {
tty->print_cr("%s:", msg);
JVMCIENV->describe_pending_exception(true);
}
JVMCIENV->clear_pending_exception();
before_exit(thread);
vm_exit(-1);
}
void JVMCIRuntime::compile_method(JVMCIEnv* JVMCIENV, JVMCICompiler* compiler, const methodHandle& method, int entry_bci) {
JVMCI_EXCEPTION_CONTEXT
JVMCICompileState* compile_state = JVMCIENV->compile_state();
bool is_osr = entry_bci != InvocationEntryBci;
if (compiler->is_bootstrapping() && is_osr) {
// no OSR compilations during bootstrap - the compiler is just too slow at this point,
// and we know that there are no endless loops
compile_state->set_failure(true, "No OSR during boostrap");
return;
}
if (JVMCI::shutdown_called()) {
compile_state->set_failure(false, "Avoiding compilation during shutdown");
return;
}
HandleMark hm;
JVMCIObject receiver = get_HotSpotJVMCIRuntime(JVMCIENV);
if (JVMCIENV->has_pending_exception()) {
fatal_exception_in_compile(JVMCIENV, thread, "Exception during HotSpotJVMCIRuntime initialization");
}
JVMCIObject jvmci_method = JVMCIENV->get_jvmci_method(method, JVMCIENV);
if (JVMCIENV->has_pending_exception()) {
JVMCIENV->describe_pending_exception(true);
compile_state->set_failure(false, "exception getting JVMCI wrapper method");
return;
}
JVMCIObject result_object = JVMCIENV->call_HotSpotJVMCIRuntime_compileMethod(receiver, jvmci_method, entry_bci,
(jlong) compile_state, compile_state->task()->compile_id());
if (!JVMCIENV->has_pending_exception()) {
if (result_object.is_non_null()) {
JVMCIObject failure_message = JVMCIENV->get_HotSpotCompilationRequestResult_failureMessage(result_object);
if (failure_message.is_non_null()) {
// Copy failure reason into resource memory first ...
const char* failure_reason = JVMCIENV->as_utf8_string(failure_message);
// ... and then into the C heap.
failure_reason = os::strdup(failure_reason, mtJVMCI);
bool retryable = JVMCIENV->get_HotSpotCompilationRequestResult_retry(result_object) != 0;
compile_state->set_failure(retryable, failure_reason, true);
} else {
if (compile_state->task()->code() == NULL) {
compile_state->set_failure(true, "no nmethod produced");
} else {
compile_state->task()->set_num_inlined_bytecodes(JVMCIENV->get_HotSpotCompilationRequestResult_inlinedBytecodes(result_object));
compiler->inc_methods_compiled();
}
}
} else {
assert(false, "JVMCICompiler.compileMethod should always return non-null");
}
} else {
// An uncaught exception here implies failure during compiler initialization.
// The only sensible thing to do here is to exit the VM.
fatal_exception_in_compile(JVMCIENV, thread, "Exception during JVMCI compiler initialization");
}
if (compiler->is_bootstrapping()) {
compiler->set_bootstrap_compilation_request_handled();
}
}
// ------------------------------------------------------------------
JVMCI::CodeInstallResult JVMCIRuntime::register_method(JVMCIEnv* JVMCIENV,
const methodHandle& method,
nmethod*& nm,
int entry_bci,
CodeOffsets* offsets,
int orig_pc_offset,
CodeBuffer* code_buffer,
int frame_words,
OopMapSet* oop_map_set,
ExceptionHandlerTable* handler_table,
ImplicitExceptionTable* implicit_exception_table,
AbstractCompiler* compiler,
DebugInformationRecorder* debug_info,
Dependencies* dependencies,
int compile_id,
bool has_unsafe_access,
bool has_wide_vector,
JVMCIObject compiled_code,
JVMCIObject nmethod_mirror,
FailedSpeculation** failed_speculations,
char* speculations,
int speculations_len) {
JVMCI_EXCEPTION_CONTEXT;
nm = NULL;
int comp_level = CompLevel_full_optimization;
char* failure_detail = NULL;
bool install_default = JVMCIENV->get_HotSpotNmethod_isDefault(nmethod_mirror) != 0;
assert(JVMCIENV->isa_HotSpotNmethod(nmethod_mirror), "must be");
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