Mercurial > hg > graal-compiler
view src/share/vm/opto/runtime.cpp @ 3877:a3592789b47c
Added tag jdk8-b02 for changeset 31e253c1da42
author | schien |
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date | Thu, 25 Aug 2011 17:17:59 -0700 |
parents | 263247c478c5 |
children | c124e2e7463e |
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/* * Copyright (c) 1998, 2011, 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/systemDictionary.hpp" #include "classfile/vmSymbols.hpp" #include "code/compiledIC.hpp" #include "code/icBuffer.hpp" #include "code/nmethod.hpp" #include "code/pcDesc.hpp" #include "code/scopeDesc.hpp" #include "code/vtableStubs.hpp" #include "compiler/compileBroker.hpp" #include "compiler/compilerOracle.hpp" #include "compiler/oopMap.hpp" #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" #include "gc_implementation/g1/heapRegion.hpp" #include "gc_interface/collectedHeap.hpp" #include "interpreter/bytecode.hpp" #include "interpreter/interpreter.hpp" #include "interpreter/linkResolver.hpp" #include "memory/barrierSet.hpp" #include "memory/gcLocker.inline.hpp" #include "memory/oopFactory.hpp" #include "oops/objArrayKlass.hpp" #include "oops/oop.inline.hpp" #include "opto/addnode.hpp" #include "opto/callnode.hpp" #include "opto/cfgnode.hpp" #include "opto/connode.hpp" #include "opto/graphKit.hpp" #include "opto/machnode.hpp" #include "opto/matcher.hpp" #include "opto/memnode.hpp" #include "opto/mulnode.hpp" #include "opto/runtime.hpp" #include "opto/subnode.hpp" #include "runtime/fprofiler.hpp" #include "runtime/handles.inline.hpp" #include "runtime/interfaceSupport.hpp" #include "runtime/javaCalls.hpp" #include "runtime/sharedRuntime.hpp" #include "runtime/signature.hpp" #include "runtime/threadCritical.hpp" #include "runtime/vframe.hpp" #include "runtime/vframeArray.hpp" #include "runtime/vframe_hp.hpp" #include "utilities/copy.hpp" #include "utilities/preserveException.hpp" #ifdef TARGET_ARCH_MODEL_x86_32 # include "adfiles/ad_x86_32.hpp" #endif #ifdef TARGET_ARCH_MODEL_x86_64 # include "adfiles/ad_x86_64.hpp" #endif #ifdef TARGET_ARCH_MODEL_sparc # include "adfiles/ad_sparc.hpp" #endif #ifdef TARGET_ARCH_MODEL_zero # include "adfiles/ad_zero.hpp" #endif #ifdef TARGET_ARCH_MODEL_arm # include "adfiles/ad_arm.hpp" #endif #ifdef TARGET_ARCH_MODEL_ppc # include "adfiles/ad_ppc.hpp" #endif // For debugging purposes: // To force FullGCALot inside a runtime function, add the following two lines // // Universe::release_fullgc_alot_dummy(); // MarkSweep::invoke(0, "Debugging"); // // At command line specify the parameters: -XX:+FullGCALot -XX:FullGCALotStart=100000000 // Compiled code entry points address OptoRuntime::_new_instance_Java = NULL; address OptoRuntime::_new_array_Java = NULL; address OptoRuntime::_multianewarray2_Java = NULL; address OptoRuntime::_multianewarray3_Java = NULL; address OptoRuntime::_multianewarray4_Java = NULL; address OptoRuntime::_multianewarray5_Java = NULL; address OptoRuntime::_multianewarrayN_Java = NULL; address OptoRuntime::_g1_wb_pre_Java = NULL; address OptoRuntime::_g1_wb_post_Java = NULL; address OptoRuntime::_vtable_must_compile_Java = NULL; address OptoRuntime::_complete_monitor_locking_Java = NULL; address OptoRuntime::_rethrow_Java = NULL; address OptoRuntime::_slow_arraycopy_Java = NULL; address OptoRuntime::_register_finalizer_Java = NULL; # ifdef ENABLE_ZAP_DEAD_LOCALS address OptoRuntime::_zap_dead_Java_locals_Java = NULL; address OptoRuntime::_zap_dead_native_locals_Java = NULL; # endif ExceptionBlob* OptoRuntime::_exception_blob; // This should be called in an assertion at the start of OptoRuntime routines // which are entered from compiled code (all of them) #ifndef PRODUCT static bool check_compiled_frame(JavaThread* thread) { assert(thread->last_frame().is_runtime_frame(), "cannot call runtime directly from compiled code"); #ifdef ASSERT RegisterMap map(thread, false); frame caller = thread->last_frame().sender(&map); assert(caller.is_compiled_frame(), "not being called from compiled like code"); #endif /* ASSERT */ return true; } #endif #define gen(env, var, type_func_gen, c_func, fancy_jump, pass_tls, save_arg_regs, return_pc) \ var = generate_stub(env, type_func_gen, CAST_FROM_FN_PTR(address, c_func), #var, fancy_jump, pass_tls, save_arg_regs, return_pc) void OptoRuntime::generate(ciEnv* env) { generate_exception_blob(); // Note: tls: Means fetching the return oop out of the thread-local storage // // variable/name type-function-gen , runtime method ,fncy_jp, tls,save_args,retpc // ------------------------------------------------------------------------------------------------------------------------------- gen(env, _new_instance_Java , new_instance_Type , new_instance_C , 0 , true , false, false); gen(env, _new_array_Java , new_array_Type , new_array_C , 0 , true , false, false); gen(env, _multianewarray2_Java , multianewarray2_Type , multianewarray2_C , 0 , true , false, false); gen(env, _multianewarray3_Java , multianewarray3_Type , multianewarray3_C , 0 , true , false, false); gen(env, _multianewarray4_Java , multianewarray4_Type , multianewarray4_C , 0 , true , false, false); gen(env, _multianewarray5_Java , multianewarray5_Type , multianewarray5_C , 0 , true , false, false); gen(env, _multianewarrayN_Java , multianewarrayN_Type , multianewarrayN_C , 0 , true , false, false); gen(env, _g1_wb_pre_Java , g1_wb_pre_Type , SharedRuntime::g1_wb_pre , 0 , false, false, false); gen(env, _g1_wb_post_Java , g1_wb_post_Type , SharedRuntime::g1_wb_post , 0 , false, false, false); gen(env, _complete_monitor_locking_Java , complete_monitor_enter_Type , SharedRuntime::complete_monitor_locking_C , 0 , false, false, false); gen(env, _rethrow_Java , rethrow_Type , rethrow_C , 2 , true , false, true ); gen(env, _slow_arraycopy_Java , slow_arraycopy_Type , SharedRuntime::slow_arraycopy_C , 0 , false, false, false); gen(env, _register_finalizer_Java , register_finalizer_Type , register_finalizer , 0 , false, false, false); # ifdef ENABLE_ZAP_DEAD_LOCALS gen(env, _zap_dead_Java_locals_Java , zap_dead_locals_Type , zap_dead_Java_locals_C , 0 , false, true , false ); gen(env, _zap_dead_native_locals_Java , zap_dead_locals_Type , zap_dead_native_locals_C , 0 , false, true , false ); # endif } #undef gen // Helper method to do generation of RunTimeStub's address OptoRuntime::generate_stub( ciEnv* env, TypeFunc_generator gen, address C_function, const char *name, int is_fancy_jump, bool pass_tls, bool save_argument_registers, bool return_pc ) { ResourceMark rm; Compile C( env, gen, C_function, name, is_fancy_jump, pass_tls, save_argument_registers, return_pc ); return C.stub_entry_point(); } const char* OptoRuntime::stub_name(address entry) { #ifndef PRODUCT CodeBlob* cb = CodeCache::find_blob(entry); RuntimeStub* rs =(RuntimeStub *)cb; assert(rs != NULL && rs->is_runtime_stub(), "not a runtime stub"); return rs->name(); #else // Fast implementation for product mode (maybe it should be inlined too) return "runtime stub"; #endif } //============================================================================= // Opto compiler runtime routines //============================================================================= //=============================allocation====================================== // We failed the fast-path allocation. Now we need to do a scavenge or GC // and try allocation again. void OptoRuntime::new_store_pre_barrier(JavaThread* thread) { // After any safepoint, just before going back to compiled code, // we inform the GC that we will be doing initializing writes to // this object in the future without emitting card-marks, so // GC may take any compensating steps. // NOTE: Keep this code consistent with GraphKit::store_barrier. oop new_obj = thread->vm_result(); if (new_obj == NULL) return; assert(Universe::heap()->can_elide_tlab_store_barriers(), "compiler must check this first"); // GC may decide to give back a safer copy of new_obj. new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj); thread->set_vm_result(new_obj); } // object allocation JRT_BLOCK_ENTRY(void, OptoRuntime::new_instance_C(klassOopDesc* klass, JavaThread* thread)) JRT_BLOCK; #ifndef PRODUCT SharedRuntime::_new_instance_ctr++; // new instance requires GC #endif assert(check_compiled_frame(thread), "incorrect caller"); // These checks are cheap to make and support reflective allocation. int lh = Klass::cast(klass)->layout_helper(); if (Klass::layout_helper_needs_slow_path(lh) || !instanceKlass::cast(klass)->is_initialized()) { KlassHandle kh(THREAD, klass); kh->check_valid_for_instantiation(false, THREAD); if (!HAS_PENDING_EXCEPTION) { instanceKlass::cast(kh())->initialize(THREAD); } if (!HAS_PENDING_EXCEPTION) { klass = kh(); } else { klass = NULL; } } if (klass != NULL) { // Scavenge and allocate an instance. oop result = instanceKlass::cast(klass)->allocate_instance(THREAD); thread->set_vm_result(result); // Pass oops back through thread local storage. Our apparent type to Java // is that we return an oop, but we can block on exit from this routine and // a GC can trash the oop in C's return register. The generated stub will // fetch the oop from TLS after any possible GC. } deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); JRT_BLOCK_END; if (GraphKit::use_ReduceInitialCardMarks()) { // inform GC that we won't do card marks for initializing writes. new_store_pre_barrier(thread); } JRT_END // array allocation JRT_BLOCK_ENTRY(void, OptoRuntime::new_array_C(klassOopDesc* array_type, int len, JavaThread *thread)) JRT_BLOCK; #ifndef PRODUCT SharedRuntime::_new_array_ctr++; // new array requires GC #endif assert(check_compiled_frame(thread), "incorrect caller"); // Scavenge and allocate an instance. oop result; if (Klass::cast(array_type)->oop_is_typeArray()) { // The oopFactory likes to work with the element type. // (We could bypass the oopFactory, since it doesn't add much value.) BasicType elem_type = typeArrayKlass::cast(array_type)->element_type(); result = oopFactory::new_typeArray(elem_type, len, THREAD); } else { // Although the oopFactory likes to work with the elem_type, // the compiler prefers the array_type, since it must already have // that latter value in hand for the fast path. klassOopDesc* elem_type = objArrayKlass::cast(array_type)->element_klass(); result = oopFactory::new_objArray(elem_type, len, THREAD); } // Pass oops back through thread local storage. Our apparent type to Java // is that we return an oop, but we can block on exit from this routine and // a GC can trash the oop in C's return register. The generated stub will // fetch the oop from TLS after any possible GC. deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); thread->set_vm_result(result); JRT_BLOCK_END; if (GraphKit::use_ReduceInitialCardMarks()) { // inform GC that we won't do card marks for initializing writes. new_store_pre_barrier(thread); } JRT_END // Note: multianewarray for one dimension is handled inline by GraphKit::new_array. // multianewarray for 2 dimensions JRT_ENTRY(void, OptoRuntime::multianewarray2_C(klassOopDesc* elem_type, int len1, int len2, JavaThread *thread)) #ifndef PRODUCT SharedRuntime::_multi2_ctr++; // multianewarray for 1 dimension #endif assert(check_compiled_frame(thread), "incorrect caller"); assert(oop(elem_type)->is_klass(), "not a class"); jint dims[2]; dims[0] = len1; dims[1] = len2; oop obj = arrayKlass::cast(elem_type)->multi_allocate(2, dims, THREAD); deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); thread->set_vm_result(obj); JRT_END // multianewarray for 3 dimensions JRT_ENTRY(void, OptoRuntime::multianewarray3_C(klassOopDesc* elem_type, int len1, int len2, int len3, JavaThread *thread)) #ifndef PRODUCT SharedRuntime::_multi3_ctr++; // multianewarray for 1 dimension #endif assert(check_compiled_frame(thread), "incorrect caller"); assert(oop(elem_type)->is_klass(), "not a class"); jint dims[3]; dims[0] = len1; dims[1] = len2; dims[2] = len3; oop obj = arrayKlass::cast(elem_type)->multi_allocate(3, dims, THREAD); deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); thread->set_vm_result(obj); JRT_END // multianewarray for 4 dimensions JRT_ENTRY(void, OptoRuntime::multianewarray4_C(klassOopDesc* elem_type, int len1, int len2, int len3, int len4, JavaThread *thread)) #ifndef PRODUCT SharedRuntime::_multi4_ctr++; // multianewarray for 1 dimension #endif assert(check_compiled_frame(thread), "incorrect caller"); assert(oop(elem_type)->is_klass(), "not a class"); jint dims[4]; dims[0] = len1; dims[1] = len2; dims[2] = len3; dims[3] = len4; oop obj = arrayKlass::cast(elem_type)->multi_allocate(4, dims, THREAD); deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); thread->set_vm_result(obj); JRT_END // multianewarray for 5 dimensions JRT_ENTRY(void, OptoRuntime::multianewarray5_C(klassOopDesc* elem_type, int len1, int len2, int len3, int len4, int len5, JavaThread *thread)) #ifndef PRODUCT SharedRuntime::_multi5_ctr++; // multianewarray for 1 dimension #endif assert(check_compiled_frame(thread), "incorrect caller"); assert(oop(elem_type)->is_klass(), "not a class"); jint dims[5]; dims[0] = len1; dims[1] = len2; dims[2] = len3; dims[3] = len4; dims[4] = len5; oop obj = arrayKlass::cast(elem_type)->multi_allocate(5, dims, THREAD); deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); thread->set_vm_result(obj); JRT_END JRT_ENTRY(void, OptoRuntime::multianewarrayN_C(klassOopDesc* elem_type, arrayOopDesc* dims, JavaThread *thread)) assert(check_compiled_frame(thread), "incorrect caller"); assert(oop(elem_type)->is_klass(), "not a class"); assert(oop(dims)->is_typeArray(), "not an array"); ResourceMark rm; jint len = dims->length(); assert(len > 0, "Dimensions array should contain data"); jint *j_dims = typeArrayOop(dims)->int_at_addr(0); jint *c_dims = NEW_RESOURCE_ARRAY(jint, len); Copy::conjoint_jints_atomic(j_dims, c_dims, len); oop obj = arrayKlass::cast(elem_type)->multi_allocate(len, c_dims, THREAD); deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); thread->set_vm_result(obj); JRT_END const TypeFunc *OptoRuntime::new_instance_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields); // create result type (range) fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); return TypeFunc::make(domain, range); } const TypeFunc *OptoRuntime::athrow_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields); // create result type (range) fields = TypeTuple::fields(0); const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields); return TypeFunc::make(domain, range); } const TypeFunc *OptoRuntime::new_array_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass fields[TypeFunc::Parms+1] = TypeInt::INT; // array size const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); // create result type (range) fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); return TypeFunc::make(domain, range); } const TypeFunc *OptoRuntime::multianewarray_Type(int ndim) { // create input type (domain) const int nargs = ndim + 1; const Type **fields = TypeTuple::fields(nargs); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass for( int i = 1; i < nargs; i++ ) fields[TypeFunc::Parms + i] = TypeInt::INT; // array size const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+nargs, fields); // create result type (range) fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); return TypeFunc::make(domain, range); } const TypeFunc *OptoRuntime::multianewarray2_Type() { return multianewarray_Type(2); } const TypeFunc *OptoRuntime::multianewarray3_Type() { return multianewarray_Type(3); } const TypeFunc *OptoRuntime::multianewarray4_Type() { return multianewarray_Type(4); } const TypeFunc *OptoRuntime::multianewarray5_Type() { return multianewarray_Type(5); } const TypeFunc *OptoRuntime::multianewarrayN_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // array of dim sizes const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); // create result type (range) fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); return TypeFunc::make(domain, range); } const TypeFunc *OptoRuntime::g1_wb_pre_Type() { const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // original field value fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); // create result type (range) fields = TypeTuple::fields(0); const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields); return TypeFunc::make(domain, range); } const TypeFunc *OptoRuntime::g1_wb_post_Type() { const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Card addr fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); // create result type (range) fields = TypeTuple::fields(0); const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields); return TypeFunc::make(domain, range); } const TypeFunc *OptoRuntime::uncommon_trap_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(1); // Symbol* name of class to be loaded fields[TypeFunc::Parms+0] = TypeInt::INT; const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields); // create result type (range) fields = TypeTuple::fields(0); const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields); return TypeFunc::make(domain, range); } # ifdef ENABLE_ZAP_DEAD_LOCALS // Type used for stub generation for zap_dead_locals. // No inputs or outputs const TypeFunc *OptoRuntime::zap_dead_locals_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(0); const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms,fields); // create result type (range) fields = TypeTuple::fields(0); const TypeTuple *range = TypeTuple::make(TypeFunc::Parms,fields); return TypeFunc::make(domain,range); } # endif //----------------------------------------------------------------------------- // Monitor Handling const TypeFunc *OptoRuntime::complete_monitor_enter_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields); // create result type (range) fields = TypeTuple::fields(0); const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); return TypeFunc::make(domain,range); } //----------------------------------------------------------------------------- const TypeFunc *OptoRuntime::complete_monitor_exit_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields); // create result type (range) fields = TypeTuple::fields(0); const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); return TypeFunc::make(domain,range); } const TypeFunc* OptoRuntime::flush_windows_Type() { // create input type (domain) const Type** fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = NULL; // void const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms, fields); // create result type fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = NULL; // void const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields); return TypeFunc::make(domain, range); } const TypeFunc* OptoRuntime::l2f_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeLong::LONG; fields[TypeFunc::Parms+1] = Type::HALF; const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); // create result type (range) fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = Type::FLOAT; const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); return TypeFunc::make(domain, range); } const TypeFunc* OptoRuntime::modf_Type() { const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = Type::FLOAT; fields[TypeFunc::Parms+1] = Type::FLOAT; const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); // create result type (range) fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = Type::FLOAT; const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); return TypeFunc::make(domain, range); } const TypeFunc *OptoRuntime::Math_D_D_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(2); // Symbol* name of class to be loaded fields[TypeFunc::Parms+0] = Type::DOUBLE; fields[TypeFunc::Parms+1] = Type::HALF; const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); // create result type (range) fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = Type::DOUBLE; fields[TypeFunc::Parms+1] = Type::HALF; const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields); return TypeFunc::make(domain, range); } const TypeFunc* OptoRuntime::Math_DD_D_Type() { const Type **fields = TypeTuple::fields(4); fields[TypeFunc::Parms+0] = Type::DOUBLE; fields[TypeFunc::Parms+1] = Type::HALF; fields[TypeFunc::Parms+2] = Type::DOUBLE; fields[TypeFunc::Parms+3] = Type::HALF; const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+4, fields); // create result type (range) fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = Type::DOUBLE; fields[TypeFunc::Parms+1] = Type::HALF; const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields); return TypeFunc::make(domain, range); } //-------------- currentTimeMillis const TypeFunc* OptoRuntime::current_time_millis_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(0); const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+0, fields); // create result type (range) fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeLong::LONG; fields[TypeFunc::Parms+1] = Type::HALF; const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields); return TypeFunc::make(domain, range); } // arraycopy stub variations: enum ArrayCopyType { ac_fast, // void(ptr, ptr, size_t) ac_checkcast, // int(ptr, ptr, size_t, size_t, ptr) ac_slow, // void(ptr, int, ptr, int, int) ac_generic // int(ptr, int, ptr, int, int) }; static const TypeFunc* make_arraycopy_Type(ArrayCopyType act) { // create input type (domain) int num_args = (act == ac_fast ? 3 : 5); int num_size_args = (act == ac_fast ? 1 : act == ac_checkcast ? 2 : 0); int argcnt = num_args; LP64_ONLY(argcnt += num_size_args); // halfwords for lengths const Type** fields = TypeTuple::fields(argcnt); int argp = TypeFunc::Parms; fields[argp++] = TypePtr::NOTNULL; // src if (num_size_args == 0) { fields[argp++] = TypeInt::INT; // src_pos } fields[argp++] = TypePtr::NOTNULL; // dest if (num_size_args == 0) { fields[argp++] = TypeInt::INT; // dest_pos fields[argp++] = TypeInt::INT; // length } while (num_size_args-- > 0) { fields[argp++] = TypeX_X; // size in whatevers (size_t) LP64_ONLY(fields[argp++] = Type::HALF); // other half of long length } if (act == ac_checkcast) { fields[argp++] = TypePtr::NOTNULL; // super_klass } assert(argp == TypeFunc::Parms+argcnt, "correct decoding of act"); const TypeTuple* domain = TypeTuple::make(TypeFunc::Parms+argcnt, fields); // create result type if needed int retcnt = (act == ac_checkcast || act == ac_generic ? 1 : 0); fields = TypeTuple::fields(1); if (retcnt == 0) fields[TypeFunc::Parms+0] = NULL; // void else fields[TypeFunc::Parms+0] = TypeInt::INT; // status result, if needed const TypeTuple* range = TypeTuple::make(TypeFunc::Parms+retcnt, fields); return TypeFunc::make(domain, range); } const TypeFunc* OptoRuntime::fast_arraycopy_Type() { // This signature is simple: Two base pointers and a size_t. return make_arraycopy_Type(ac_fast); } const TypeFunc* OptoRuntime::checkcast_arraycopy_Type() { // An extension of fast_arraycopy_Type which adds type checking. return make_arraycopy_Type(ac_checkcast); } const TypeFunc* OptoRuntime::slow_arraycopy_Type() { // This signature is exactly the same as System.arraycopy. // There are no intptr_t (int/long) arguments. return make_arraycopy_Type(ac_slow); } const TypeFunc* OptoRuntime::generic_arraycopy_Type() { // This signature is like System.arraycopy, except that it returns status. return make_arraycopy_Type(ac_generic); } const TypeFunc* OptoRuntime::array_fill_Type() { // create input type (domain): pointer, int, size_t const Type** fields = TypeTuple::fields(3 LP64_ONLY( + 1)); int argp = TypeFunc::Parms; fields[argp++] = TypePtr::NOTNULL; fields[argp++] = TypeInt::INT; fields[argp++] = TypeX_X; // size in whatevers (size_t) LP64_ONLY(fields[argp++] = Type::HALF); // other half of long length const TypeTuple *domain = TypeTuple::make(argp, fields); // create result type fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = NULL; // void const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields); return TypeFunc::make(domain, range); } //------------- Interpreter state access for on stack replacement const TypeFunc* OptoRuntime::osr_end_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // OSR temp buf const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields); // create result type fields = TypeTuple::fields(1); // fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // locked oop fields[TypeFunc::Parms+0] = NULL; // void const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields); return TypeFunc::make(domain, range); } //-------------- methodData update helpers const TypeFunc* OptoRuntime::profile_receiver_type_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeAryPtr::NOTNULL; // methodData pointer fields[TypeFunc::Parms+1] = TypeInstPtr::BOTTOM; // receiver oop const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); // create result type fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = NULL; // void const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields); return TypeFunc::make(domain,range); } JRT_LEAF(void, OptoRuntime::profile_receiver_type_C(DataLayout* data, oopDesc* receiver)) if (receiver == NULL) return; klassOop receiver_klass = receiver->klass(); intptr_t* mdp = ((intptr_t*)(data)) + DataLayout::header_size_in_cells(); int empty_row = -1; // free row, if any is encountered // ReceiverTypeData* vc = new ReceiverTypeData(mdp); for (uint row = 0; row < ReceiverTypeData::row_limit(); row++) { // if (vc->receiver(row) == receiver_klass) int receiver_off = ReceiverTypeData::receiver_cell_index(row); intptr_t row_recv = *(mdp + receiver_off); if (row_recv == (intptr_t) receiver_klass) { // vc->set_receiver_count(row, vc->receiver_count(row) + DataLayout::counter_increment); int count_off = ReceiverTypeData::receiver_count_cell_index(row); *(mdp + count_off) += DataLayout::counter_increment; return; } else if (row_recv == 0) { // else if (vc->receiver(row) == NULL) empty_row = (int) row; } } if (empty_row != -1) { int receiver_off = ReceiverTypeData::receiver_cell_index(empty_row); // vc->set_receiver(empty_row, receiver_klass); *(mdp + receiver_off) = (intptr_t) receiver_klass; // vc->set_receiver_count(empty_row, DataLayout::counter_increment); int count_off = ReceiverTypeData::receiver_count_cell_index(empty_row); *(mdp + count_off) = DataLayout::counter_increment; } else { // Receiver did not match any saved receiver and there is no empty row for it. // Increment total counter to indicate polymorphic case. intptr_t* count_p = (intptr_t*)(((byte*)(data)) + in_bytes(CounterData::count_offset())); *count_p += DataLayout::counter_increment; } JRT_END //----------------------------------------------------------------------------- // implicit exception support. static void report_null_exception_in_code_cache(address exception_pc) { ResourceMark rm; CodeBlob* n = CodeCache::find_blob(exception_pc); if (n != NULL) { tty->print_cr("#"); tty->print_cr("# HotSpot Runtime Error, null exception in generated code"); tty->print_cr("#"); tty->print_cr("# pc where exception happened = " INTPTR_FORMAT, exception_pc); if (n->is_nmethod()) { methodOop method = ((nmethod*)n)->method(); tty->print_cr("# Method where it happened %s.%s ", Klass::cast(method->method_holder())->name()->as_C_string(), method->name()->as_C_string()); tty->print_cr("#"); if (ShowMessageBoxOnError && UpdateHotSpotCompilerFileOnError) { const char* title = "HotSpot Runtime Error"; const char* question = "Do you want to exclude compilation of this method in future runs?"; if (os::message_box(title, question)) { CompilerOracle::append_comment_to_file(""); CompilerOracle::append_comment_to_file("Null exception in compiled code resulted in the following exclude"); CompilerOracle::append_comment_to_file(""); CompilerOracle::append_exclude_to_file(method); tty->print_cr("#"); tty->print_cr("# %s has been updated to exclude the specified method", CompileCommandFile); tty->print_cr("#"); } } fatal("Implicit null exception happened in compiled method"); } else { n->print(); fatal("Implicit null exception happened in generated stub"); } } fatal("Implicit null exception at wrong place"); } //------------------------------------------------------------------------------------- // register policy bool OptoRuntime::is_callee_saved_register(MachRegisterNumbers reg) { assert(reg >= 0 && reg < _last_Mach_Reg, "must be a machine register"); switch (register_save_policy[reg]) { case 'C': return false; //SOC case 'E': return true ; //SOE case 'N': return false; //NS case 'A': return false; //AS } ShouldNotReachHere(); return false; } //----------------------------------------------------------------------- // Exceptions // static void trace_exception(oop exception_oop, address exception_pc, const char* msg) PRODUCT_RETURN; // The method is an entry that is always called by a C++ method not // directly from compiled code. Compiled code will call the C++ method following. // We can't allow async exception to be installed during exception processing. JRT_ENTRY_NO_ASYNC(address, OptoRuntime::handle_exception_C_helper(JavaThread* thread, nmethod* &nm)) // Do not confuse exception_oop with pending_exception. The exception_oop // is only used to pass arguments into the method. Not for general // exception handling. DO NOT CHANGE IT to use pending_exception, since // the runtime stubs checks this on exit. assert(thread->exception_oop() != NULL, "exception oop is found"); address handler_address = NULL; Handle exception(thread, thread->exception_oop()); if (TraceExceptions) { trace_exception(exception(), thread->exception_pc(), ""); } // for AbortVMOnException flag NOT_PRODUCT(Exceptions::debug_check_abort(exception)); #ifdef ASSERT if (!(exception->is_a(SystemDictionary::Throwable_klass()))) { // should throw an exception here ShouldNotReachHere(); } #endif // new exception handling: this method is entered only from adapters // exceptions from compiled java methods are handled in compiled code // using rethrow node address pc = thread->exception_pc(); nm = CodeCache::find_nmethod(pc); assert(nm != NULL, "No NMethod found"); if (nm->is_native_method()) { fatal("Native mathod should not have path to exception handling"); } else { // we are switching to old paradigm: search for exception handler in caller_frame // instead in exception handler of caller_frame.sender() if (JvmtiExport::can_post_on_exceptions()) { // "Full-speed catching" is not necessary here, // since we're notifying the VM on every catch. // Force deoptimization and the rest of the lookup // will be fine. deoptimize_caller_frame(thread, true); } // Check the stack guard pages. If enabled, look for handler in this frame; // otherwise, forcibly unwind the frame. // // 4826555: use default current sp for reguard_stack instead of &nm: it's more accurate. bool force_unwind = !thread->reguard_stack(); bool deopting = false; if (nm->is_deopt_pc(pc)) { deopting = true; RegisterMap map(thread, false); frame deoptee = thread->last_frame().sender(&map); assert(deoptee.is_deoptimized_frame(), "must be deopted"); // Adjust the pc back to the original throwing pc pc = deoptee.pc(); } // If we are forcing an unwind because of stack overflow then deopt is // irrelevant sice we are throwing the frame away anyway. if (deopting && !force_unwind) { handler_address = SharedRuntime::deopt_blob()->unpack_with_exception(); } else { handler_address = force_unwind ? NULL : nm->handler_for_exception_and_pc(exception, pc); if (handler_address == NULL) { handler_address = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true); assert (handler_address != NULL, "must have compiled handler"); // Update the exception cache only when the unwind was not forced. if (!force_unwind) { nm->add_handler_for_exception_and_pc(exception,pc,handler_address); } } else { assert(handler_address == SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true), "Must be the same"); } } thread->set_exception_pc(pc); thread->set_exception_handler_pc(handler_address); thread->set_exception_stack_size(0); // Check if the exception PC is a MethodHandle call site. thread->set_is_method_handle_return(nm->is_method_handle_return(pc)); } // Restore correct return pc. Was saved above. thread->set_exception_oop(exception()); return handler_address; JRT_END // We are entering here from exception_blob // 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 without the usual JRT wrapper. We will call a helper routine that // will do the normal VM entry. We do it this way so that we can see if the nmethod // we looked up the handler for has been deoptimized in the meantime. If it has been // we must not use the handler and instread return the deopt blob. address OptoRuntime::handle_exception_C(JavaThread* thread) { // // We are in Java not VM and in debug mode we have a NoHandleMark // #ifndef PRODUCT SharedRuntime::_find_handler_ctr++; // find exception handler #endif debug_only(NoHandleMark __hm;) nmethod* nm = NULL; address handler_address = NULL; { // Enter the VM ResetNoHandleMark rnhm; handler_address = handle_exception_C_helper(thread, nm); } // Back in java: Use no oops, DON'T safepoint // Now check to see if the handler we are returning is in a now // deoptimized frame if (nm != NULL) { RegisterMap map(thread, false); frame caller = thread->last_frame().sender(&map); #ifdef ASSERT assert(caller.is_compiled_frame(), "must be"); #endif // ASSERT if (caller.is_deoptimized_frame()) { handler_address = SharedRuntime::deopt_blob()->unpack_with_exception(); } } return handler_address; } //------------------------------rethrow---------------------------------------- // We get here after compiled code has executed a 'RethrowNode'. The callee // is either throwing or rethrowing an exception. The callee-save registers // have been restored, synchronized objects have been unlocked and the callee // stack frame has been removed. The return address was passed in. // Exception oop is passed as the 1st argument. This routine is then called // from the stub. On exit, we know where to jump in the caller's code. // After this C code exits, the stub will pop his frame and end in a jump // (instead of a return). We enter the caller's default handler. // // This must be JRT_LEAF: // - caller will not change its state as we cannot block on exit, // therefore raw_exception_handler_for_return_address is all it takes // to handle deoptimized blobs // // However, there needs to be a safepoint check in the middle! So compiled // safepoints are completely watertight. // // Thus, it cannot be a leaf since it contains the No_GC_Verifier. // // *THIS IS NOT RECOMMENDED PROGRAMMING STYLE* // address OptoRuntime::rethrow_C(oopDesc* exception, JavaThread* thread, address ret_pc) { #ifndef PRODUCT SharedRuntime::_rethrow_ctr++; // count rethrows #endif assert (exception != NULL, "should have thrown a NULLPointerException"); #ifdef ASSERT if (!(exception->is_a(SystemDictionary::Throwable_klass()))) { // should throw an exception here ShouldNotReachHere(); } #endif thread->set_vm_result(exception); // Frame not compiled (handles deoptimization blob) return SharedRuntime::raw_exception_handler_for_return_address(thread, ret_pc); } const TypeFunc *OptoRuntime::rethrow_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields); // create result type (range) fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); return TypeFunc::make(domain, range); } void OptoRuntime::deoptimize_caller_frame(JavaThread *thread, bool doit) { // Deoptimize frame if (doit) { // Called from within the owner thread, so no need for safepoint RegisterMap reg_map(thread); frame stub_frame = thread->last_frame(); assert(stub_frame.is_runtime_frame() || exception_blob()->contains(stub_frame.pc()), "sanity check"); frame caller_frame = stub_frame.sender(®_map); // bypass VM_DeoptimizeFrame and deoptimize the frame directly Deoptimization::deoptimize_frame(thread, caller_frame.id()); } } const TypeFunc *OptoRuntime::register_finalizer_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(1); fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // oop; Receiver // // The JavaThread* is passed to each routine as the last argument // fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // JavaThread *; Executing thread const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields); // create result type (range) fields = TypeTuple::fields(0); const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); return TypeFunc::make(domain,range); } //----------------------------------------------------------------------------- // Dtrace support. entry and exit probes have the same signature const TypeFunc *OptoRuntime::dtrace_method_entry_exit_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // methodOop; Method we are entering const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields); // create result type (range) fields = TypeTuple::fields(0); const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); return TypeFunc::make(domain,range); } const TypeFunc *OptoRuntime::dtrace_object_alloc_Type() { // create input type (domain) const Type **fields = TypeTuple::fields(2); fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // oop; newly allocated object const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields); // create result type (range) fields = TypeTuple::fields(0); const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); return TypeFunc::make(domain,range); } JRT_ENTRY_NO_ASYNC(void, OptoRuntime::register_finalizer(oopDesc* obj, JavaThread* thread)) assert(obj->is_oop(), "must be a valid oop"); assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); instanceKlass::register_finalizer(instanceOop(obj), CHECK); JRT_END //----------------------------------------------------------------------------- NamedCounter * volatile OptoRuntime::_named_counters = NULL; // // dump the collected NamedCounters. // void OptoRuntime::print_named_counters() { int total_lock_count = 0; int eliminated_lock_count = 0; NamedCounter* c = _named_counters; while (c) { if (c->tag() == NamedCounter::LockCounter || c->tag() == NamedCounter::EliminatedLockCounter) { int count = c->count(); if (count > 0) { bool eliminated = c->tag() == NamedCounter::EliminatedLockCounter; if (Verbose) { tty->print_cr("%d %s%s", count, c->name(), eliminated ? " (eliminated)" : ""); } total_lock_count += count; if (eliminated) { eliminated_lock_count += count; } } } else if (c->tag() == NamedCounter::BiasedLockingCounter) { BiasedLockingCounters* blc = ((BiasedLockingNamedCounter*)c)->counters(); if (blc->nonzero()) { tty->print_cr("%s", c->name()); blc->print_on(tty); } } c = c->next(); } if (total_lock_count > 0) { tty->print_cr("dynamic locks: %d", total_lock_count); if (eliminated_lock_count) { tty->print_cr("eliminated locks: %d (%d%%)", eliminated_lock_count, (int)(eliminated_lock_count * 100.0 / total_lock_count)); } } } // // Allocate a new NamedCounter. The JVMState is used to generate the // name which consists of method@line for the inlining tree. // NamedCounter* OptoRuntime::new_named_counter(JVMState* youngest_jvms, NamedCounter::CounterTag tag) { int max_depth = youngest_jvms->depth(); // Visit scopes from youngest to oldest. bool first = true; stringStream st; for (int depth = max_depth; depth >= 1; depth--) { JVMState* jvms = youngest_jvms->of_depth(depth); ciMethod* m = jvms->has_method() ? jvms->method() : NULL; if (!first) { st.print(" "); } else { first = false; } int bci = jvms->bci(); if (bci < 0) bci = 0; st.print("%s.%s@%d", m->holder()->name()->as_utf8(), m->name()->as_utf8(), bci); // To print linenumbers instead of bci use: m->line_number_from_bci(bci) } NamedCounter* c; if (tag == NamedCounter::BiasedLockingCounter) { c = new BiasedLockingNamedCounter(strdup(st.as_string())); } else { c = new NamedCounter(strdup(st.as_string()), tag); } // atomically add the new counter to the head of the list. We only // add counters so this is safe. NamedCounter* head; do { head = _named_counters; c->set_next(head); } while (Atomic::cmpxchg_ptr(c, &_named_counters, head) != head); return c; } //----------------------------------------------------------------------------- // Non-product code #ifndef PRODUCT int trace_exception_counter = 0; static void trace_exception(oop exception_oop, address exception_pc, const char* msg) { ttyLocker ttyl; trace_exception_counter++; tty->print("%d [Exception (%s): ", trace_exception_counter, msg); exception_oop->print_value(); tty->print(" in "); CodeBlob* blob = CodeCache::find_blob(exception_pc); if (blob->is_nmethod()) { ((nmethod*)blob)->method()->print_value(); } else if (blob->is_runtime_stub()) { tty->print("<runtime-stub>"); } else { tty->print("<unknown>"); } tty->print(" at " INTPTR_FORMAT, exception_pc); tty->print_cr("]"); } #endif // PRODUCT # ifdef ENABLE_ZAP_DEAD_LOCALS // Called from call sites in compiled code with oop maps (actually safepoints) // Zaps dead locals in first java frame. // Is entry because may need to lock to generate oop maps // Currently, only used for compiler frames, but someday may be used // for interpreter frames, too. int OptoRuntime::ZapDeadCompiledLocals_count = 0; // avoid pointers to member funcs with these helpers static bool is_java_frame( frame* f) { return f->is_java_frame(); } static bool is_native_frame(frame* f) { return f->is_native_frame(); } void OptoRuntime::zap_dead_java_or_native_locals(JavaThread* thread, bool (*is_this_the_right_frame_to_zap)(frame*)) { assert(JavaThread::current() == thread, "is this needed?"); if ( !ZapDeadCompiledLocals ) return; bool skip = false; if ( ZapDeadCompiledLocalsFirst == 0 ) ; // nothing special else if ( ZapDeadCompiledLocalsFirst > ZapDeadCompiledLocals_count ) skip = true; else if ( ZapDeadCompiledLocalsFirst == ZapDeadCompiledLocals_count ) warning("starting zapping after skipping"); if ( ZapDeadCompiledLocalsLast == -1 ) ; // nothing special else if ( ZapDeadCompiledLocalsLast < ZapDeadCompiledLocals_count ) skip = true; else if ( ZapDeadCompiledLocalsLast == ZapDeadCompiledLocals_count ) warning("about to zap last zap"); ++ZapDeadCompiledLocals_count; // counts skipped zaps, too if ( skip ) return; // find java frame and zap it for (StackFrameStream sfs(thread); !sfs.is_done(); sfs.next()) { if (is_this_the_right_frame_to_zap(sfs.current()) ) { sfs.current()->zap_dead_locals(thread, sfs.register_map()); return; } } warning("no frame found to zap in zap_dead_Java_locals_C"); } JRT_LEAF(void, OptoRuntime::zap_dead_Java_locals_C(JavaThread* thread)) zap_dead_java_or_native_locals(thread, is_java_frame); JRT_END // The following does not work because for one thing, the // thread state is wrong; it expects java, but it is native. // Also, the invariants in a native stub are different and // I'm not sure it is safe to have a MachCalRuntimeDirectNode // in there. // So for now, we do not zap in native stubs. JRT_LEAF(void, OptoRuntime::zap_dead_native_locals_C(JavaThread* thread)) zap_dead_java_or_native_locals(thread, is_native_frame); JRT_END # endif