Mercurial > hg > graal-compiler
view src/share/vm/graal/graalRuntime.cpp @ 11698:4eec2ac671c2
Refactor the WordTypeVerificationPhase to use fewer graph iterations, and invoke it a fewer places
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Tue, 17 Sep 2013 18:36:54 -0700 |
parents | 97e282186b5b |
children | 359f7e70ae7f 0991c12c4186 |
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/* * Copyright (c) 2012, 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 "asm/codeBuffer.hpp" #include "graal/graalRuntime.hpp" #include "graal/graalVMToCompiler.hpp" #include "memory/oopFactory.hpp" #include "prims/jvm.h" #include "runtime/biasedLocking.hpp" #include "runtime/interfaceSupport.hpp" #include "runtime/reflection.hpp" #include "utilities/debug.hpp" // 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"); } } JRT_ENTRY(void, GraalRuntime::new_instance(JavaThread* thread, Klass* klass)) assert(klass->is_klass(), "not a class"); instanceKlassHandle h(thread, klass); h->check_valid_for_instantiation(true, CHECK); // make sure klass is initialized h->initialize(CHECK); // allocate instance and return via TLS oop obj = h->allocate_instance(CHECK); thread->set_vm_result(obj); JRT_END JRT_ENTRY(void, GraalRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length)) // 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->oop_is_typeArray()) { BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type(); obj = oopFactory::new_typeArray(elt_type, length, CHECK); } else { Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass(); 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) { ResourceMark rm(THREAD); THROW(vmSymbols::java_lang_OutOfMemoryError()); } else { deopt_caller(); } } JRT_END JRT_ENTRY(void, GraalRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims)) assert(klass->is_klass(), "not a class"); assert(rank >= 1, "rank must be nonzero"); oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK); thread->set_vm_result(obj); JRT_END JRT_ENTRY(void, GraalRuntime::dynamic_new_array(JavaThread* thread, oop element_mirror, jint length)) oop obj = Reflection::reflect_new_array(element_mirror, length, 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, nmethod*& nm)) // Reset method handle flag. thread->set_is_method_handle_return(false); Handle exception(thread, ex); nm = CodeCache::find_nmethod(pc); assert(nm != NULL, "this is not an nmethod"); // Adjust the pc as needed/ if (nm->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(exception->is_oop(), "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_yellow_zone_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 = nm->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(nm->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 (TraceExceptions) { ttyLocker ttyl; ResourceMark rm; int offset = pc - nm->code_begin(); tty->print_cr("Exception <%s> (0x%x) thrown in compiled method <%s> at PC " PTR_FORMAT " [" PTR_FORMAT "+%d] for thread 0x%x", exception->print_value_string(), (address)exception(), nm->method()->print_value_string(), pc, nm->code_begin(), offset, thread); } // 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->set_exception_oop(NULL); thread->set_exception_pc(NULL); continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false); // 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 by non-implicit exceptions if (continuation != NULL && !SharedRuntime::deopt_blob()->contains(continuation)) { nm->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(nm->is_method_handle_return(pc)); if (TraceExceptions) { ttyLocker ttyl; ResourceMark rm; tty->print_cr("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT " for exception thrown at PC " PTR_FORMAT, thread, continuation, 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 GraalRuntime::exception_handler_for_pc(JavaThread* thread) { oop exception = thread->exception_oop(); address pc = thread->exception_pc(); // Still in Java mode DEBUG_ONLY(ResetNoHandleMark rnhm); nmethod* nm = NULL; address continuation = NULL; { // Enter VM mode by calling the helper ResetNoHandleMark rnhm; continuation = exception_handler_for_pc_helper(thread, exception, pc, nm); } // Back in JAVA, use no oops DON'T safepoint // Now check to see if the nmethod we were called from is now deoptimized. // If so we must return to the deopt blob and deoptimize the nmethod if (nm != NULL && caller_is_deopted()) { continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls(); } assert(continuation != NULL, "no handler found"); return continuation; } JRT_ENTRY(void, GraalRuntime::create_null_exception(JavaThread* thread)) thread->set_vm_result(Exceptions::new_exception(thread, vmSymbols::java_lang_NullPointerException(), NULL)()); JRT_END JRT_ENTRY(void, GraalRuntime::create_out_of_bounds_exception(JavaThread* thread, jint index)) char message[jintAsStringSize]; sprintf(message, "%d", index); thread->set_vm_result(Exceptions::new_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message)()); JRT_END JRT_ENTRY_NO_ASYNC(void, GraalRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock)) if (TraceGraal >= 3) { char type[O_BUFLEN]; obj->klass()->name()->as_C_string(type, O_BUFLEN); markOop mark = obj->mark(); tty->print_cr("%s: entered locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), obj, type, mark, lock); tty->flush(); } #ifdef ASSERT if (PrintBiasedLockingStatistics) { Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); } #endif Handle h_obj(thread, obj); assert(h_obj()->is_oop(), "must be NULL or an object"); if (UseBiasedLocking) { // Retry fast entry if bias is revoked to avoid unnecessary inflation ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); } else { if (GraalUseFastLocking) { // When using fast locking, the compiled code has already tried the fast case ObjectSynchronizer::slow_enter(h_obj, lock, THREAD); } else { ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD); } } if (TraceGraal >= 3) { tty->print_cr("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), obj); } JRT_END JRT_LEAF(void, GraalRuntime::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 DEBUG if (!obj->is_oop()) { 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(), obj); } thread->print_stack_on(tty); assert(false, "invalid lock object pointer dected"); } #endif if (GraalUseFastLocking) { // When using fast locking, the compiled code has already tried the fast case ObjectSynchronizer::slow_exit(obj, lock, THREAD); } else { ObjectSynchronizer::fast_exit(obj, lock, THREAD); } if (TraceGraal >= 3) { char type[O_BUFLEN]; obj->klass()->name()->as_C_string(type, O_BUFLEN); tty->print_cr("%s: exited locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), obj, type, obj->mark(), lock); tty->flush(); } JRT_END JRT_ENTRY(void, GraalRuntime::log_object(JavaThread* thread, oop obj, jint flags)) bool string = mask_bits_are_true(flags, LOG_OBJECT_STRING); bool address = mask_bits_are_true(flags, LOG_OBJECT_ADDRESS); bool newline = mask_bits_are_true(flags, LOG_OBJECT_NEWLINE); if (!string) { if (!address && obj->is_oop_or_null(true)) { char buf[O_BUFLEN]; tty->print("%s@%p", obj->klass()->name()->as_C_string(buf, O_BUFLEN), obj); } else { tty->print("%p", 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(buf); } if (newline) { tty->cr(); } JRT_END JRT_LEAF(void, GraalRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj)) thread->satb_mark_queue().enqueue(obj); JRT_END JRT_LEAF(void, GraalRuntime::write_barrier_post(JavaThread* thread, void* card_addr)) thread->dirty_card_queue().enqueue(card_addr); JRT_END JRT_LEAF(jboolean, GraalRuntime::validate_object(JavaThread* thread,oopDesc* parent, oopDesc* child)) bool ret = true; if(!Universe::heap()->is_in_closed_subset(parent)) { tty->print_cr("Parent Object "INTPTR_FORMAT" not in heap", parent); parent->print(); ret=false; } if(!Universe::heap()->is_in_closed_subset(child)) { tty->print_cr("Child Object "INTPTR_FORMAT" not in heap", child); child->print(); ret=false; } return (jint)ret; JRT_END JRT_ENTRY(void, GraalRuntime::vm_error(JavaThread* thread, oop where, oop format, jlong value)) ResourceMark rm; assert(where == NULL || java_lang_String::is_instance(where), "must be"); const char *error_msg = where == NULL ? "<internal Graal error>" : java_lang_String::as_utf8_string(where); char *detail_msg = NULL; if (format != NULL) { const char* buf = java_lang_String::as_utf8_string(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, detail_msg); JRT_END JRT_LEAF(oop, GraalRuntime::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 JRT_LEAF(void, GraalRuntime::log_printf(JavaThread* thread, oop format, jlong v1, jlong v2, jlong v3)) ResourceMark rm; assert(format != NULL && java_lang_String::is_instance(format), "must be"); char *buf = java_lang_String::as_utf8_string(format); tty->print(buf, v1, v2, v3); JRT_END 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 [%p+%d]", cb->as_nmethod_or_null()->method()->name_and_sig_as_C_string(buf, O_BUFLEN), cb->code_begin(), (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("%p [long: %d, double %f, char %c]", v, v, v, v); } } JRT_LEAF(void, GraalRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3)) ResourceMark rm; char *buf = (char*) (address) format; if (vmError) { if (buf != NULL) { fatal(err_msg(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 JRT_ENTRY(void, GraalRuntime::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(INT64_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, GraalRuntime::identity_hash_code(JavaThread* thread, oop obj)) return (jint) obj->identity_hash(); JRT_END JRT_ENTRY(jboolean, GraalRuntime::thread_is_interrupted(JavaThread* thread, oop receiver, jboolean clear_interrupted)) // Ensure that the C++ Thread and OSThread structures aren't freed before we operate Handle receiverHandle(thread, receiver); MutexLockerEx ml(thread->threadObj() == receiver ? NULL : Threads_lock); JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle()); return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0); JRT_END // JVM_InitializeGraalRuntime JVM_ENTRY(jobject, JVM_InitializeGraalRuntime(JNIEnv *env, jclass graalclass)) return VMToCompiler::graalRuntimePermObject(); JVM_END // JVM_InitializeTruffleRuntime JVM_ENTRY(jobject, JVM_InitializeTruffleRuntime(JNIEnv *env, jclass graalclass)) return JNIHandles::make_local(VMToCompiler::truffleRuntime()()); JVM_END