| /* |
| * Copyright (c) 1997, 2016, 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/macroAssembler.hpp" |
| #include "interpreter/bytecodeHistogram.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "interpreter/interpreterRuntime.hpp" |
| #include "interpreter/interp_masm.hpp" |
| #include "interpreter/templateInterpreterGenerator.hpp" |
| #include "interpreter/templateTable.hpp" |
| #include "oops/arrayOop.hpp" |
| #include "oops/methodData.hpp" |
| #include "oops/method.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "prims/jvmtiExport.hpp" |
| #include "prims/jvmtiThreadState.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/deoptimization.hpp" |
| #include "runtime/frame.inline.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "runtime/stubRoutines.hpp" |
| #include "runtime/synchronizer.hpp" |
| #include "runtime/timer.hpp" |
| #include "runtime/vframeArray.hpp" |
| #include "utilities/debug.hpp" |
| #include "utilities/macros.hpp" |
| |
| #ifndef FAST_DISPATCH |
| #define FAST_DISPATCH 1 |
| #endif |
| #undef FAST_DISPATCH |
| |
| // Size of interpreter code. Increase if too small. Interpreter will |
| // fail with a guarantee ("not enough space for interpreter generation"); |
| // if too small. |
| // Run with +PrintInterpreter to get the VM to print out the size. |
| // Max size with JVMTI |
| #ifdef _LP64 |
| // The sethi() instruction generates lots more instructions when shell |
| // stack limit is unlimited, so that's why this is much bigger. |
| int TemplateInterpreter::InterpreterCodeSize = 260 * K; |
| #else |
| int TemplateInterpreter::InterpreterCodeSize = 230 * K; |
| #endif |
| |
| // Generation of Interpreter |
| // |
| // The TemplateInterpreterGenerator generates the interpreter into Interpreter::_code. |
| |
| |
| #define __ _masm-> |
| |
| |
| //---------------------------------------------------------------------------------------------------- |
| |
| #ifndef _LP64 |
| address TemplateInterpreterGenerator::generate_slow_signature_handler() { |
| address entry = __ pc(); |
| Argument argv(0, true); |
| |
| // We are in the jni transition frame. Save the last_java_frame corresponding to the |
| // outer interpreter frame |
| // |
| __ set_last_Java_frame(FP, noreg); |
| // make sure the interpreter frame we've pushed has a valid return pc |
| __ mov(O7, I7); |
| __ mov(Lmethod, G3_scratch); |
| __ mov(Llocals, G4_scratch); |
| __ save_frame(0); |
| __ mov(G2_thread, L7_thread_cache); |
| __ add(argv.address_in_frame(), O3); |
| __ mov(G2_thread, O0); |
| __ mov(G3_scratch, O1); |
| __ call(CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), relocInfo::runtime_call_type); |
| __ delayed()->mov(G4_scratch, O2); |
| __ mov(L7_thread_cache, G2_thread); |
| __ reset_last_Java_frame(); |
| |
| // load the register arguments (the C code packed them as varargs) |
| for (Argument ldarg = argv.successor(); ldarg.is_register(); ldarg = ldarg.successor()) { |
| __ ld_ptr(ldarg.address_in_frame(), ldarg.as_register()); |
| } |
| __ ret(); |
| __ delayed()-> |
| restore(O0, 0, Lscratch); // caller's Lscratch gets the result handler |
| return entry; |
| } |
| |
| |
| #else |
| // LP64 passes floating point arguments in F1, F3, F5, etc. instead of |
| // O0, O1, O2 etc.. |
| // Doubles are passed in D0, D2, D4 |
| // We store the signature of the first 16 arguments in the first argument |
| // slot because it will be overwritten prior to calling the native |
| // function, with the pointer to the JNIEnv. |
| // If LP64 there can be up to 16 floating point arguments in registers |
| // or 6 integer registers. |
| address TemplateInterpreterGenerator::generate_slow_signature_handler() { |
| |
| enum { |
| non_float = 0, |
| float_sig = 1, |
| double_sig = 2, |
| sig_mask = 3 |
| }; |
| |
| address entry = __ pc(); |
| Argument argv(0, true); |
| |
| // We are in the jni transition frame. Save the last_java_frame corresponding to the |
| // outer interpreter frame |
| // |
| __ set_last_Java_frame(FP, noreg); |
| // make sure the interpreter frame we've pushed has a valid return pc |
| __ mov(O7, I7); |
| __ mov(Lmethod, G3_scratch); |
| __ mov(Llocals, G4_scratch); |
| __ save_frame(0); |
| __ mov(G2_thread, L7_thread_cache); |
| __ add(argv.address_in_frame(), O3); |
| __ mov(G2_thread, O0); |
| __ mov(G3_scratch, O1); |
| __ call(CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), relocInfo::runtime_call_type); |
| __ delayed()->mov(G4_scratch, O2); |
| __ mov(L7_thread_cache, G2_thread); |
| __ reset_last_Java_frame(); |
| |
| |
| // load the register arguments (the C code packed them as varargs) |
| Address Sig = argv.address_in_frame(); // Argument 0 holds the signature |
| __ ld_ptr( Sig, G3_scratch ); // Get register argument signature word into G3_scratch |
| __ mov( G3_scratch, G4_scratch); |
| __ srl( G4_scratch, 2, G4_scratch); // Skip Arg 0 |
| Label done; |
| for (Argument ldarg = argv.successor(); ldarg.is_float_register(); ldarg = ldarg.successor()) { |
| Label NonFloatArg; |
| Label LoadFloatArg; |
| Label LoadDoubleArg; |
| Label NextArg; |
| Address a = ldarg.address_in_frame(); |
| __ andcc(G4_scratch, sig_mask, G3_scratch); |
| __ br(Assembler::zero, false, Assembler::pt, NonFloatArg); |
| __ delayed()->nop(); |
| |
| __ cmp(G3_scratch, float_sig ); |
| __ br(Assembler::equal, false, Assembler::pt, LoadFloatArg); |
| __ delayed()->nop(); |
| |
| __ cmp(G3_scratch, double_sig ); |
| __ br(Assembler::equal, false, Assembler::pt, LoadDoubleArg); |
| __ delayed()->nop(); |
| |
| __ bind(NonFloatArg); |
| // There are only 6 integer register arguments! |
| if ( ldarg.is_register() ) |
| __ ld_ptr(ldarg.address_in_frame(), ldarg.as_register()); |
| else { |
| // Optimization, see if there are any more args and get out prior to checking |
| // all 16 float registers. My guess is that this is rare. |
| // If is_register is false, then we are done the first six integer args. |
| __ br_null_short(G4_scratch, Assembler::pt, done); |
| } |
| __ ba(NextArg); |
| __ delayed()->srl( G4_scratch, 2, G4_scratch ); |
| |
| __ bind(LoadFloatArg); |
| __ ldf( FloatRegisterImpl::S, a, ldarg.as_float_register(), 4); |
| __ ba(NextArg); |
| __ delayed()->srl( G4_scratch, 2, G4_scratch ); |
| |
| __ bind(LoadDoubleArg); |
| __ ldf( FloatRegisterImpl::D, a, ldarg.as_double_register() ); |
| __ ba(NextArg); |
| __ delayed()->srl( G4_scratch, 2, G4_scratch ); |
| |
| __ bind(NextArg); |
| |
| } |
| |
| __ bind(done); |
| __ ret(); |
| __ delayed()-> |
| restore(O0, 0, Lscratch); // caller's Lscratch gets the result handler |
| return entry; |
| } |
| #endif |
| |
| void TemplateInterpreterGenerator::generate_counter_overflow(Label& Lcontinue) { |
| |
| // Generate code to initiate compilation on the counter overflow. |
| |
| // InterpreterRuntime::frequency_counter_overflow takes two arguments, |
| // the first indicates if the counter overflow occurs at a backwards branch (NULL bcp) |
| // and the second is only used when the first is true. We pass zero for both. |
| // The call returns the address of the verified entry point for the method or NULL |
| // if the compilation did not complete (either went background or bailed out). |
| __ set((int)false, O2); |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), O2, O2, true); |
| // returns verified_entry_point or NULL |
| // we ignore it in any case |
| __ ba_short(Lcontinue); |
| |
| } |
| |
| |
| // End of helpers |
| |
| // Various method entries |
| |
| // Abstract method entry |
| // Attempt to execute abstract method. Throw exception |
| // |
| address TemplateInterpreterGenerator::generate_abstract_entry(void) { |
| address entry = __ pc(); |
| // abstract method entry |
| // throw exception |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError)); |
| // the call_VM checks for exception, so we should never return here. |
| __ should_not_reach_here(); |
| return entry; |
| |
| } |
| |
| void TemplateInterpreterGenerator::save_native_result(void) { |
| // result potentially in O0/O1: save it across calls |
| const Address& l_tmp = InterpreterMacroAssembler::l_tmp; |
| |
| // result potentially in F0/F1: save it across calls |
| const Address& d_tmp = InterpreterMacroAssembler::d_tmp; |
| |
| // save and restore any potential method result value around the unlocking operation |
| __ stf(FloatRegisterImpl::D, F0, d_tmp); |
| #ifdef _LP64 |
| __ stx(O0, l_tmp); |
| #else |
| __ std(O0, l_tmp); |
| #endif |
| } |
| |
| void TemplateInterpreterGenerator::restore_native_result(void) { |
| const Address& l_tmp = InterpreterMacroAssembler::l_tmp; |
| const Address& d_tmp = InterpreterMacroAssembler::d_tmp; |
| |
| // Restore any method result value |
| __ ldf(FloatRegisterImpl::D, d_tmp, F0); |
| #ifdef _LP64 |
| __ ldx(l_tmp, O0); |
| #else |
| __ ldd(l_tmp, O0); |
| #endif |
| } |
| |
| address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { |
| assert(!pass_oop || message == NULL, "either oop or message but not both"); |
| address entry = __ pc(); |
| // expression stack must be empty before entering the VM if an exception happened |
| __ empty_expression_stack(); |
| // load exception object |
| __ set((intptr_t)name, G3_scratch); |
| if (pass_oop) { |
| __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), G3_scratch, Otos_i); |
| } else { |
| __ set((intptr_t)message, G4_scratch); |
| __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), G3_scratch, G4_scratch); |
| } |
| // throw exception |
| assert(Interpreter::throw_exception_entry() != NULL, "generate it first"); |
| AddressLiteral thrower(Interpreter::throw_exception_entry()); |
| __ jump_to(thrower, G3_scratch); |
| __ delayed()->nop(); |
| return entry; |
| } |
| |
| address TemplateInterpreterGenerator::generate_ClassCastException_handler() { |
| address entry = __ pc(); |
| // expression stack must be empty before entering the VM if an exception |
| // happened |
| __ empty_expression_stack(); |
| // load exception object |
| __ call_VM(Oexception, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::throw_ClassCastException), |
| Otos_i); |
| __ should_not_reach_here(); |
| return entry; |
| } |
| |
| |
| address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) { |
| address entry = __ pc(); |
| // expression stack must be empty before entering the VM if an exception happened |
| __ empty_expression_stack(); |
| // convention: expect aberrant index in register G3_scratch, then shuffle the |
| // index to G4_scratch for the VM call |
| __ mov(G3_scratch, G4_scratch); |
| __ set((intptr_t)name, G3_scratch); |
| __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), G3_scratch, G4_scratch); |
| __ should_not_reach_here(); |
| return entry; |
| } |
| |
| |
| address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { |
| address entry = __ pc(); |
| // expression stack must be empty before entering the VM if an exception happened |
| __ empty_expression_stack(); |
| __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); |
| __ should_not_reach_here(); |
| return entry; |
| } |
| |
| |
| address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { |
| address entry = __ pc(); |
| |
| if (state == atos) { |
| __ profile_return_type(O0, G3_scratch, G1_scratch); |
| } |
| |
| #if !defined(_LP64) && defined(COMPILER2) |
| // All return values are where we want them, except for Longs. C2 returns |
| // longs in G1 in the 32-bit build whereas the interpreter wants them in O0/O1. |
| // Since the interpreter will return longs in G1 and O0/O1 in the 32bit |
| // build even if we are returning from interpreted we just do a little |
| // stupid shuffing. |
| // Note: I tried to make c2 return longs in O0/O1 and G1 so we wouldn't have to |
| // do this here. Unfortunately if we did a rethrow we'd see an machepilog node |
| // first which would move g1 -> O0/O1 and destroy the exception we were throwing. |
| |
| if (state == ltos) { |
| __ srl (G1, 0, O1); |
| __ srlx(G1, 32, O0); |
| } |
| #endif // !_LP64 && COMPILER2 |
| |
| // The callee returns with the stack possibly adjusted by adapter transition |
| // We remove that possible adjustment here. |
| // All interpreter local registers are untouched. Any result is passed back |
| // in the O0/O1 or float registers. Before continuing, the arguments must be |
| // popped from the java expression stack; i.e., Lesp must be adjusted. |
| |
| __ mov(Llast_SP, SP); // Remove any adapter added stack space. |
| |
| const Register cache = G3_scratch; |
| const Register index = G1_scratch; |
| __ get_cache_and_index_at_bcp(cache, index, 1, index_size); |
| |
| const Register flags = cache; |
| __ ld_ptr(cache, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset(), flags); |
| const Register parameter_size = flags; |
| __ and3(flags, ConstantPoolCacheEntry::parameter_size_mask, parameter_size); // argument size in words |
| __ sll(parameter_size, Interpreter::logStackElementSize, parameter_size); // each argument size in bytes |
| __ add(Lesp, parameter_size, Lesp); // pop arguments |
| __ dispatch_next(state, step); |
| |
| return entry; |
| } |
| |
| |
| address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { |
| address entry = __ pc(); |
| __ get_constant_pool_cache(LcpoolCache); // load LcpoolCache |
| #if INCLUDE_JVMCI |
| // Check if we need to take lock at entry of synchronized method. This can |
| // only occur on method entry so emit it only for vtos with step 0. |
| if (UseJVMCICompiler && state == vtos && step == 0) { |
| Label L; |
| Address pending_monitor_enter_addr(G2_thread, JavaThread::pending_monitorenter_offset()); |
| __ ldbool(pending_monitor_enter_addr, Gtemp); // Load if pending monitor enter |
| __ cmp_and_br_short(Gtemp, G0, Assembler::equal, Assembler::pn, L); |
| // Clear flag. |
| __ stbool(G0, pending_monitor_enter_addr); |
| // Take lock. |
| lock_method(); |
| __ bind(L); |
| } else { |
| #ifdef ASSERT |
| if (UseJVMCICompiler) { |
| Label L; |
| Address pending_monitor_enter_addr(G2_thread, JavaThread::pending_monitorenter_offset()); |
| __ ldbool(pending_monitor_enter_addr, Gtemp); // Load if pending monitor enter |
| __ cmp_and_br_short(Gtemp, G0, Assembler::equal, Assembler::pn, L); |
| __ stop("unexpected pending monitor in deopt entry"); |
| __ bind(L); |
| } |
| #endif |
| } |
| #endif |
| { Label L; |
| Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
| __ ld_ptr(exception_addr, Gtemp); // Load pending exception. |
| __ br_null_short(Gtemp, Assembler::pt, L); |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception)); |
| __ should_not_reach_here(); |
| __ bind(L); |
| } |
| __ dispatch_next(state, step); |
| return entry; |
| } |
| |
| // A result handler converts/unboxes a native call result into |
| // a java interpreter/compiler result. The current frame is an |
| // interpreter frame. The activation frame unwind code must be |
| // consistent with that of TemplateTable::_return(...). In the |
| // case of native methods, the caller's SP was not modified. |
| address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) { |
| address entry = __ pc(); |
| Register Itos_i = Otos_i ->after_save(); |
| Register Itos_l = Otos_l ->after_save(); |
| Register Itos_l1 = Otos_l1->after_save(); |
| Register Itos_l2 = Otos_l2->after_save(); |
| switch (type) { |
| case T_BOOLEAN: __ subcc(G0, O0, G0); __ addc(G0, 0, Itos_i); break; // !0 => true; 0 => false |
| case T_CHAR : __ sll(O0, 16, O0); __ srl(O0, 16, Itos_i); break; // cannot use and3, 0xFFFF too big as immediate value! |
| case T_BYTE : __ sll(O0, 24, O0); __ sra(O0, 24, Itos_i); break; |
| case T_SHORT : __ sll(O0, 16, O0); __ sra(O0, 16, Itos_i); break; |
| case T_LONG : |
| #ifndef _LP64 |
| __ mov(O1, Itos_l2); // move other half of long |
| #endif // ifdef or no ifdef, fall through to the T_INT case |
| case T_INT : __ mov(O0, Itos_i); break; |
| case T_VOID : /* nothing to do */ break; |
| case T_FLOAT : assert(F0 == Ftos_f, "fix this code" ); break; |
| case T_DOUBLE : assert(F0 == Ftos_d, "fix this code" ); break; |
| case T_OBJECT : |
| __ ld_ptr(FP, (frame::interpreter_frame_oop_temp_offset*wordSize) + STACK_BIAS, Itos_i); |
| __ verify_oop(Itos_i); |
| break; |
| default : ShouldNotReachHere(); |
| } |
| __ ret(); // return from interpreter activation |
| __ delayed()->restore(I5_savedSP, G0, SP); // remove interpreter frame |
| NOT_PRODUCT(__ emit_int32(0);) // marker for disassembly |
| return entry; |
| } |
| |
| address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) { |
| address entry = __ pc(); |
| __ push(state); |
| __ call_VM(noreg, runtime_entry); |
| __ dispatch_via(vtos, Interpreter::normal_table(vtos)); |
| return entry; |
| } |
| |
| |
| address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { |
| address entry = __ pc(); |
| __ dispatch_next(state); |
| return entry; |
| } |
| |
| // |
| // Helpers for commoning out cases in the various type of method entries. |
| // |
| |
| // increment invocation count & check for overflow |
| // |
| // Note: checking for negative value instead of overflow |
| // so we have a 'sticky' overflow test |
| // |
| // Lmethod: method |
| // ??: invocation counter |
| // |
| void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { |
| // Note: In tiered we increment either counters in MethodCounters* or in |
| // MDO depending if we're profiling or not. |
| const Register G3_method_counters = G3_scratch; |
| Label done; |
| |
| if (TieredCompilation) { |
| const int increment = InvocationCounter::count_increment; |
| Label no_mdo; |
| if (ProfileInterpreter) { |
| // If no method data exists, go to profile_continue. |
| __ ld_ptr(Lmethod, Method::method_data_offset(), G4_scratch); |
| __ br_null_short(G4_scratch, Assembler::pn, no_mdo); |
| // Increment counter |
| Address mdo_invocation_counter(G4_scratch, |
| in_bytes(MethodData::invocation_counter_offset()) + |
| in_bytes(InvocationCounter::counter_offset())); |
| Address mask(G4_scratch, in_bytes(MethodData::invoke_mask_offset())); |
| __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, |
| G3_scratch, Lscratch, |
| Assembler::zero, overflow); |
| __ ba_short(done); |
| } |
| |
| // Increment counter in MethodCounters* |
| __ bind(no_mdo); |
| Address invocation_counter(G3_method_counters, |
| in_bytes(MethodCounters::invocation_counter_offset()) + |
| in_bytes(InvocationCounter::counter_offset())); |
| __ get_method_counters(Lmethod, G3_method_counters, done); |
| Address mask(G3_method_counters, in_bytes(MethodCounters::invoke_mask_offset())); |
| __ increment_mask_and_jump(invocation_counter, increment, mask, |
| G4_scratch, Lscratch, |
| Assembler::zero, overflow); |
| __ bind(done); |
| } else { // not TieredCompilation |
| // Update standard invocation counters |
| __ get_method_counters(Lmethod, G3_method_counters, done); |
| __ increment_invocation_counter(G3_method_counters, O0, G4_scratch); |
| if (ProfileInterpreter) { |
| Address interpreter_invocation_counter(G3_method_counters, |
| in_bytes(MethodCounters::interpreter_invocation_counter_offset())); |
| __ ld(interpreter_invocation_counter, G4_scratch); |
| __ inc(G4_scratch); |
| __ st(G4_scratch, interpreter_invocation_counter); |
| } |
| |
| if (ProfileInterpreter && profile_method != NULL) { |
| // Test to see if we should create a method data oop |
| Address profile_limit(G3_method_counters, in_bytes(MethodCounters::interpreter_profile_limit_offset())); |
| __ ld(profile_limit, G1_scratch); |
| __ cmp_and_br_short(O0, G1_scratch, Assembler::lessUnsigned, Assembler::pn, *profile_method_continue); |
| |
| // if no method data exists, go to profile_method |
| __ test_method_data_pointer(*profile_method); |
| } |
| |
| Address invocation_limit(G3_method_counters, in_bytes(MethodCounters::interpreter_invocation_limit_offset())); |
| __ ld(invocation_limit, G3_scratch); |
| __ cmp(O0, G3_scratch); |
| __ br(Assembler::greaterEqualUnsigned, false, Assembler::pn, *overflow); // Far distance |
| __ delayed()->nop(); |
| __ bind(done); |
| } |
| |
| } |
| |
| // Allocate monitor and lock method (asm interpreter) |
| // ebx - Method* |
| // |
| void TemplateInterpreterGenerator::lock_method() { |
| __ ld(Lmethod, in_bytes(Method::access_flags_offset()), O0); // Load access flags. |
| |
| #ifdef ASSERT |
| { Label ok; |
| __ btst(JVM_ACC_SYNCHRONIZED, O0); |
| __ br( Assembler::notZero, false, Assembler::pt, ok); |
| __ delayed()->nop(); |
| __ stop("method doesn't need synchronization"); |
| __ bind(ok); |
| } |
| #endif // ASSERT |
| |
| // get synchronization object to O0 |
| { Label done; |
| __ btst(JVM_ACC_STATIC, O0); |
| __ br( Assembler::zero, true, Assembler::pt, done); |
| __ delayed()->ld_ptr(Llocals, Interpreter::local_offset_in_bytes(0), O0); // get receiver for not-static case |
| |
| // lock the mirror, not the Klass* |
| __ load_mirror(O0, Lmethod); |
| |
| #ifdef ASSERT |
| __ tst(O0); |
| __ breakpoint_trap(Assembler::zero, Assembler::ptr_cc); |
| #endif // ASSERT |
| |
| __ bind(done); |
| } |
| |
| __ add_monitor_to_stack(true, noreg, noreg); // allocate monitor elem |
| __ st_ptr( O0, Lmonitors, BasicObjectLock::obj_offset_in_bytes()); // store object |
| // __ untested("lock_object from method entry"); |
| __ lock_object(Lmonitors, O0); |
| } |
| |
| // See if we've got enough room on the stack for locals plus overhead below |
| // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError |
| // without going through the signal handler, i.e., reserved and yellow zones |
| // will not be made usable. The shadow zone must suffice to handle the |
| // overflow. |
| void TemplateInterpreterGenerator::generate_stack_overflow_check(Register Rframe_size, |
| Register Rscratch) { |
| const int page_size = os::vm_page_size(); |
| Label after_frame_check; |
| |
| assert_different_registers(Rframe_size, Rscratch); |
| |
| __ set(page_size, Rscratch); |
| __ cmp_and_br_short(Rframe_size, Rscratch, Assembler::lessEqual, Assembler::pt, after_frame_check); |
| |
| // Get the stack overflow limit, and in debug, verify it is non-zero. |
| __ ld_ptr(G2_thread, JavaThread::stack_overflow_limit_offset(), Rscratch); |
| #ifdef ASSERT |
| Label limit_ok; |
| __ br_notnull_short(Rscratch, Assembler::pn, limit_ok); |
| __ stop("stack overflow limit is zero in generate_stack_overflow_check"); |
| __ bind(limit_ok); |
| #endif |
| |
| // Add in the size of the frame (which is the same as subtracting it from the |
| // SP, which would take another register. |
| __ add(Rscratch, Rframe_size, Rscratch); |
| |
| // The frame is greater than one page in size, so check against |
| // the bottom of the stack. |
| __ cmp_and_brx_short(SP, Rscratch, Assembler::greaterUnsigned, Assembler::pt, after_frame_check); |
| |
| // The stack will overflow, throw an exception. |
| |
| // Note that SP is restored to sender's sp (in the delay slot). This |
| // is necessary if the sender's frame is an extended compiled frame |
| // (see gen_c2i_adapter()) and safer anyway in case of JSR292 |
| // adaptations. |
| |
| // Note also that the restored frame is not necessarily interpreted. |
| // Use the shared runtime version of the StackOverflowError. |
| assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); |
| AddressLiteral stub(StubRoutines::throw_StackOverflowError_entry()); |
| __ jump_to(stub, Rscratch); |
| __ delayed()->mov(O5_savedSP, SP); |
| |
| // If you get to here, then there is enough stack space. |
| __ bind(after_frame_check); |
| } |
| |
| |
| // |
| // Generate a fixed interpreter frame. This is identical setup for interpreted |
| // methods and for native methods hence the shared code. |
| |
| |
| //---------------------------------------------------------------------------------------------------- |
| // Stack frame layout |
| // |
| // When control flow reaches any of the entry types for the interpreter |
| // the following holds -> |
| // |
| // C2 Calling Conventions: |
| // |
| // The entry code below assumes that the following registers are set |
| // when coming in: |
| // G5_method: holds the Method* of the method to call |
| // Lesp: points to the TOS of the callers expression stack |
| // after having pushed all the parameters |
| // |
| // The entry code does the following to setup an interpreter frame |
| // pop parameters from the callers stack by adjusting Lesp |
| // set O0 to Lesp |
| // compute X = (max_locals - num_parameters) |
| // bump SP up by X to accomadate the extra locals |
| // compute X = max_expression_stack |
| // + vm_local_words |
| // + 16 words of register save area |
| // save frame doing a save sp, -X, sp growing towards lower addresses |
| // set Lbcp, Lmethod, LcpoolCache |
| // set Llocals to i0 |
| // set Lmonitors to FP - rounded_vm_local_words |
| // set Lesp to Lmonitors - 4 |
| // |
| // The frame has now been setup to do the rest of the entry code |
| |
| // Try this optimization: Most method entries could live in a |
| // "one size fits all" stack frame without all the dynamic size |
| // calculations. It might be profitable to do all this calculation |
| // statically and approximately for "small enough" methods. |
| |
| //----------------------------------------------------------------------------------------------- |
| |
| // C1 Calling conventions |
| // |
| // Upon method entry, the following registers are setup: |
| // |
| // g2 G2_thread: current thread |
| // g5 G5_method: method to activate |
| // g4 Gargs : pointer to last argument |
| // |
| // |
| // Stack: |
| // |
| // +---------------+ <--- sp |
| // | | |
| // : reg save area : |
| // | | |
| // +---------------+ <--- sp + 0x40 |
| // | | |
| // : extra 7 slots : note: these slots are not really needed for the interpreter (fix later) |
| // | | |
| // +---------------+ <--- sp + 0x5c |
| // | | |
| // : free : |
| // | | |
| // +---------------+ <--- Gargs |
| // | | |
| // : arguments : |
| // | | |
| // +---------------+ |
| // | | |
| // |
| // |
| // |
| // AFTER FRAME HAS BEEN SETUP for method interpretation the stack looks like: |
| // |
| // +---------------+ <--- sp |
| // | | |
| // : reg save area : |
| // | | |
| // +---------------+ <--- sp + 0x40 |
| // | | |
| // : extra 7 slots : note: these slots are not really needed for the interpreter (fix later) |
| // | | |
| // +---------------+ <--- sp + 0x5c |
| // | | |
| // : : |
| // | | <--- Lesp |
| // +---------------+ <--- Lmonitors (fp - 0x18) |
| // | VM locals | |
| // +---------------+ <--- fp |
| // | | |
| // : reg save area : |
| // | | |
| // +---------------+ <--- fp + 0x40 |
| // | | |
| // : extra 7 slots : note: these slots are not really needed for the interpreter (fix later) |
| // | | |
| // +---------------+ <--- fp + 0x5c |
| // | | |
| // : free : |
| // | | |
| // +---------------+ |
| // | | |
| // : nonarg locals : |
| // | | |
| // +---------------+ |
| // | | |
| // : arguments : |
| // | | <--- Llocals |
| // +---------------+ <--- Gargs |
| // | | |
| |
| void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { |
| // |
| // |
| // The entry code sets up a new interpreter frame in 4 steps: |
| // |
| // 1) Increase caller's SP by for the extra local space needed: |
| // (check for overflow) |
| // Efficient implementation of xload/xstore bytecodes requires |
| // that arguments and non-argument locals are in a contigously |
| // addressable memory block => non-argument locals must be |
| // allocated in the caller's frame. |
| // |
| // 2) Create a new stack frame and register window: |
| // The new stack frame must provide space for the standard |
| // register save area, the maximum java expression stack size, |
| // the monitor slots (0 slots initially), and some frame local |
| // scratch locations. |
| // |
| // 3) The following interpreter activation registers must be setup: |
| // Lesp : expression stack pointer |
| // Lbcp : bytecode pointer |
| // Lmethod : method |
| // Llocals : locals pointer |
| // Lmonitors : monitor pointer |
| // LcpoolCache: constant pool cache |
| // |
| // 4) Initialize the non-argument locals if necessary: |
| // Non-argument locals may need to be initialized to NULL |
| // for GC to work. If the oop-map information is accurate |
| // (in the absence of the JSR problem), no initialization |
| // is necessary. |
| // |
| // (gri - 2/25/2000) |
| |
| |
| int rounded_vm_local_words = round_to( frame::interpreter_frame_vm_local_words, WordsPerLong ); |
| |
| const int extra_space = |
| rounded_vm_local_words + // frame local scratch space |
| Method::extra_stack_entries() + // extra stack for jsr 292 |
| frame::memory_parameter_word_sp_offset + // register save area |
| (native_call ? frame::interpreter_frame_extra_outgoing_argument_words : 0); |
| |
| const Register Glocals_size = G3; |
| const Register RconstMethod = Glocals_size; |
| const Register Otmp1 = O3; |
| const Register Otmp2 = O4; |
| // Lscratch can't be used as a temporary because the call_stub uses |
| // it to assert that the stack frame was setup correctly. |
| const Address constMethod (G5_method, Method::const_offset()); |
| const Address size_of_parameters(RconstMethod, ConstMethod::size_of_parameters_offset()); |
| |
| __ ld_ptr( constMethod, RconstMethod ); |
| __ lduh( size_of_parameters, Glocals_size); |
| |
| // Gargs points to first local + BytesPerWord |
| // Set the saved SP after the register window save |
| // |
| assert_different_registers(Gargs, Glocals_size, Gframe_size, O5_savedSP); |
| __ sll(Glocals_size, Interpreter::logStackElementSize, Otmp1); |
| __ add(Gargs, Otmp1, Gargs); |
| |
| if (native_call) { |
| __ calc_mem_param_words( Glocals_size, Gframe_size ); |
| __ add( Gframe_size, extra_space, Gframe_size); |
| __ round_to( Gframe_size, WordsPerLong ); |
| __ sll( Gframe_size, LogBytesPerWord, Gframe_size ); |
| |
| // Native calls don't need the stack size check since they have no |
| // expression stack and the arguments are already on the stack and |
| // we only add a handful of words to the stack. |
| } else { |
| |
| // |
| // Compute number of locals in method apart from incoming parameters |
| // |
| const Address size_of_locals(Otmp1, ConstMethod::size_of_locals_offset()); |
| __ ld_ptr(constMethod, Otmp1); |
| __ lduh(size_of_locals, Otmp1); |
| __ sub(Otmp1, Glocals_size, Glocals_size); |
| __ round_to(Glocals_size, WordsPerLong); |
| __ sll(Glocals_size, Interpreter::logStackElementSize, Glocals_size); |
| |
| // See if the frame is greater than one page in size. If so, |
| // then we need to verify there is enough stack space remaining. |
| // Frame_size = (max_stack + extra_space) * BytesPerWord; |
| __ ld_ptr(constMethod, Gframe_size); |
| __ lduh(Gframe_size, in_bytes(ConstMethod::max_stack_offset()), Gframe_size); |
| __ add(Gframe_size, extra_space, Gframe_size); |
| __ round_to(Gframe_size, WordsPerLong); |
| __ sll(Gframe_size, Interpreter::logStackElementSize, Gframe_size); |
| |
| // Add in java locals size for stack overflow check only |
| __ add(Gframe_size, Glocals_size, Gframe_size); |
| |
| const Register Otmp2 = O4; |
| assert_different_registers(Otmp1, Otmp2, O5_savedSP); |
| generate_stack_overflow_check(Gframe_size, Otmp1); |
| |
| __ sub(Gframe_size, Glocals_size, Gframe_size); |
| |
| // |
| // bump SP to accomodate the extra locals |
| // |
| __ sub(SP, Glocals_size, SP); |
| } |
| |
| // |
| // now set up a stack frame with the size computed above |
| // |
| __ neg( Gframe_size ); |
| __ save( SP, Gframe_size, SP ); |
| |
| // |
| // now set up all the local cache registers |
| // |
| // NOTE: At this point, Lbyte_code/Lscratch has been modified. Note |
| // that all present references to Lbyte_code initialize the register |
| // immediately before use |
| if (native_call) { |
| __ mov(G0, Lbcp); |
| } else { |
| __ ld_ptr(G5_method, Method::const_offset(), Lbcp); |
| __ add(Lbcp, in_bytes(ConstMethod::codes_offset()), Lbcp); |
| } |
| __ mov( G5_method, Lmethod); // set Lmethod |
| // Get mirror and store it in the frame as GC root for this Method* |
| Register mirror = LcpoolCache; |
| __ load_mirror(mirror, Lmethod); |
| __ st_ptr(mirror, FP, (frame::interpreter_frame_mirror_offset * wordSize) + STACK_BIAS); |
| __ get_constant_pool_cache( LcpoolCache ); // set LcpoolCache |
| __ sub(FP, rounded_vm_local_words * BytesPerWord, Lmonitors ); // set Lmonitors |
| #ifdef _LP64 |
| __ add( Lmonitors, STACK_BIAS, Lmonitors ); // Account for 64 bit stack bias |
| #endif |
| __ sub(Lmonitors, BytesPerWord, Lesp); // set Lesp |
| |
| // setup interpreter activation registers |
| __ sub(Gargs, BytesPerWord, Llocals); // set Llocals |
| |
| if (ProfileInterpreter) { |
| #ifdef FAST_DISPATCH |
| // FAST_DISPATCH and ProfileInterpreter are mutually exclusive since |
| // they both use I2. |
| assert(0, "FAST_DISPATCH and +ProfileInterpreter are mutually exclusive"); |
| #endif // FAST_DISPATCH |
| __ set_method_data_pointer(); |
| } |
| |
| } |
| |
| // Method entry for java.lang.ref.Reference.get. |
| address TemplateInterpreterGenerator::generate_Reference_get_entry(void) { |
| #if INCLUDE_ALL_GCS |
| // Code: _aload_0, _getfield, _areturn |
| // parameter size = 1 |
| // |
| // The code that gets generated by this routine is split into 2 parts: |
| // 1. The "intrinsified" code for G1 (or any SATB based GC), |
| // 2. The slow path - which is an expansion of the regular method entry. |
| // |
| // Notes:- |
| // * In the G1 code we do not check whether we need to block for |
| // a safepoint. If G1 is enabled then we must execute the specialized |
| // code for Reference.get (except when the Reference object is null) |
| // so that we can log the value in the referent field with an SATB |
| // update buffer. |
| // If the code for the getfield template is modified so that the |
| // G1 pre-barrier code is executed when the current method is |
| // Reference.get() then going through the normal method entry |
| // will be fine. |
| // * The G1 code can, however, check the receiver object (the instance |
| // of java.lang.Reference) and jump to the slow path if null. If the |
| // Reference object is null then we obviously cannot fetch the referent |
| // and so we don't need to call the G1 pre-barrier. Thus we can use the |
| // regular method entry code to generate the NPE. |
| // |
| // This code is based on generate_accessor_enty. |
| |
| address entry = __ pc(); |
| |
| const int referent_offset = java_lang_ref_Reference::referent_offset; |
| guarantee(referent_offset > 0, "referent offset not initialized"); |
| |
| if (UseG1GC) { |
| Label slow_path; |
| |
| // In the G1 code we don't check if we need to reach a safepoint. We |
| // continue and the thread will safepoint at the next bytecode dispatch. |
| |
| // Check if local 0 != NULL |
| // If the receiver is null then it is OK to jump to the slow path. |
| __ ld_ptr(Gargs, G0, Otos_i ); // get local 0 |
| // check if local 0 == NULL and go the slow path |
| __ cmp_and_brx_short(Otos_i, 0, Assembler::equal, Assembler::pn, slow_path); |
| |
| |
| // Load the value of the referent field. |
| if (Assembler::is_simm13(referent_offset)) { |
| __ load_heap_oop(Otos_i, referent_offset, Otos_i); |
| } else { |
| __ set(referent_offset, G3_scratch); |
| __ load_heap_oop(Otos_i, G3_scratch, Otos_i); |
| } |
| |
| // Generate the G1 pre-barrier code to log the value of |
| // the referent field in an SATB buffer. Note with |
| // these parameters the pre-barrier does not generate |
| // the load of the previous value |
| |
| __ g1_write_barrier_pre(noreg /* obj */, noreg /* index */, 0 /* offset */, |
| Otos_i /* pre_val */, |
| G3_scratch /* tmp */, |
| true /* preserve_o_regs */); |
| |
| // _areturn |
| __ retl(); // return from leaf routine |
| __ delayed()->mov(O5_savedSP, SP); |
| |
| // Generate regular method entry |
| __ bind(slow_path); |
| __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals)); |
| return entry; |
| } |
| #endif // INCLUDE_ALL_GCS |
| |
| // If G1 is not enabled then attempt to go through the accessor entry point |
| // Reference.get is an accessor |
| return NULL; |
| } |
| |
| /** |
| * Method entry for static native methods: |
| * int java.util.zip.CRC32.update(int crc, int b) |
| */ |
| address TemplateInterpreterGenerator::generate_CRC32_update_entry() { |
| |
| if (UseCRC32Intrinsics) { |
| address entry = __ pc(); |
| |
| Label L_slow_path; |
| // If we need a safepoint check, generate full interpreter entry. |
| ExternalAddress state(SafepointSynchronize::address_of_state()); |
| __ set(ExternalAddress(SafepointSynchronize::address_of_state()), O2); |
| __ set(SafepointSynchronize::_not_synchronized, O3); |
| __ cmp_and_br_short(O2, O3, Assembler::notEqual, Assembler::pt, L_slow_path); |
| |
| // Load parameters |
| const Register crc = O0; // initial crc |
| const Register val = O1; // byte to update with |
| const Register table = O2; // address of 256-entry lookup table |
| |
| __ ldub(Gargs, 3, val); |
| __ lduw(Gargs, 8, crc); |
| |
| __ set(ExternalAddress(StubRoutines::crc_table_addr()), table); |
| |
| __ not1(crc); // ~crc |
| __ clruwu(crc); |
| __ update_byte_crc32(crc, val, table); |
| __ not1(crc); // ~crc |
| |
| // result in O0 |
| __ retl(); |
| __ delayed()->nop(); |
| |
| // generate a vanilla native entry as the slow path |
| __ bind(L_slow_path); |
| __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native)); |
| return entry; |
| } |
| return NULL; |
| } |
| |
| /** |
| * Method entry for static native methods: |
| * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len) |
| * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len) |
| */ |
| address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) { |
| |
| if (UseCRC32Intrinsics) { |
| address entry = __ pc(); |
| |
| Label L_slow_path; |
| // If we need a safepoint check, generate full interpreter entry. |
| ExternalAddress state(SafepointSynchronize::address_of_state()); |
| __ set(ExternalAddress(SafepointSynchronize::address_of_state()), O2); |
| __ set(SafepointSynchronize::_not_synchronized, O3); |
| __ cmp_and_br_short(O2, O3, Assembler::notEqual, Assembler::pt, L_slow_path); |
| |
| // Load parameters from the stack |
| const Register crc = O0; // initial crc |
| const Register buf = O1; // source java byte array address |
| const Register len = O2; // len |
| const Register offset = O3; // offset |
| |
| // Arguments are reversed on java expression stack |
| // Calculate address of start element |
| if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { |
| __ lduw(Gargs, 0, len); |
| __ lduw(Gargs, 8, offset); |
| __ ldx( Gargs, 16, buf); |
| __ lduw(Gargs, 32, crc); |
| __ add(buf, offset, buf); |
| } else { |
| __ lduw(Gargs, 0, len); |
| __ lduw(Gargs, 8, offset); |
| __ ldx( Gargs, 16, buf); |
| __ lduw(Gargs, 24, crc); |
| __ add(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE), buf); // account for the header size |
| __ add(buf ,offset, buf); |
| } |
| |
| // Call the crc32 kernel |
| __ MacroAssembler::save_thread(L7_thread_cache); |
| __ kernel_crc32(crc, buf, len, O3); |
| __ MacroAssembler::restore_thread(L7_thread_cache); |
| |
| // result in O0 |
| __ retl(); |
| __ delayed()->nop(); |
| |
| // generate a vanilla native entry as the slow path |
| __ bind(L_slow_path); |
| __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native)); |
| return entry; |
| } |
| return NULL; |
| } |
| |
| /** |
| * Method entry for intrinsic-candidate (non-native) methods: |
| * int java.util.zip.CRC32C.updateBytes(int crc, byte[] b, int off, int end) |
| * int java.util.zip.CRC32C.updateDirectByteBuffer(int crc, long buf, int off, int end) |
| * Unlike CRC32, CRC32C does not have any methods marked as native |
| * CRC32C also uses an "end" variable instead of the length variable CRC32 uses |
| */ |
| address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) { |
| |
| if (UseCRC32CIntrinsics) { |
| address entry = __ pc(); |
| |
| // Load parameters from the stack |
| const Register crc = O0; // initial crc |
| const Register buf = O1; // source java byte array address |
| const Register offset = O2; // offset |
| const Register end = O3; // index of last element to process |
| const Register len = O2; // len argument to the kernel |
| const Register table = O3; // crc32c lookup table address |
| |
| // Arguments are reversed on java expression stack |
| // Calculate address of start element |
| if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) { |
| __ lduw(Gargs, 0, end); |
| __ lduw(Gargs, 8, offset); |
| __ ldx( Gargs, 16, buf); |
| __ lduw(Gargs, 32, crc); |
| __ add(buf, offset, buf); |
| __ sub(end, offset, len); |
| } else { |
| __ lduw(Gargs, 0, end); |
| __ lduw(Gargs, 8, offset); |
| __ ldx( Gargs, 16, buf); |
| __ lduw(Gargs, 24, crc); |
| __ add(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE), buf); // account for the header size |
| __ add(buf, offset, buf); |
| __ sub(end, offset, len); |
| } |
| |
| // Call the crc32c kernel |
| __ MacroAssembler::save_thread(L7_thread_cache); |
| __ kernel_crc32c(crc, buf, len, table); |
| __ MacroAssembler::restore_thread(L7_thread_cache); |
| |
| // result in O0 |
| __ retl(); |
| __ delayed()->nop(); |
| |
| return entry; |
| } |
| return NULL; |
| } |
| |
| // Not supported |
| address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { |
| return NULL; |
| } |
| |
| // TODO: rather than touching all pages, check against stack_overflow_limit and bang yellow page to |
| // generate exception |
| void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { |
| // Quick & dirty stack overflow checking: bang the stack & handle trap. |
| // Note that we do the banging after the frame is setup, since the exception |
| // handling code expects to find a valid interpreter frame on the stack. |
| // Doing the banging earlier fails if the caller frame is not an interpreter |
| // frame. |
| // (Also, the exception throwing code expects to unlock any synchronized |
| // method receiever, so do the banging after locking the receiver.) |
| |
| // Bang each page in the shadow zone. We can't assume it's been done for |
| // an interpreter frame with greater than a page of locals, so each page |
| // needs to be checked. Only true for non-native. |
| if (UseStackBanging) { |
| const int page_size = os::vm_page_size(); |
| const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size; |
| const int start_page = native_call ? n_shadow_pages : 1; |
| for (int pages = start_page; pages <= n_shadow_pages; pages++) { |
| __ bang_stack_with_offset(pages*page_size); |
| } |
| } |
| } |
| |
| // |
| // Interpreter stub for calling a native method. (asm interpreter) |
| // This sets up a somewhat different looking stack for calling the native method |
| // than the typical interpreter frame setup. |
| // |
| |
| address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { |
| address entry = __ pc(); |
| |
| // the following temporary registers are used during frame creation |
| const Register Gtmp1 = G3_scratch ; |
| const Register Gtmp2 = G1_scratch; |
| bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; |
| |
| // make sure registers are different! |
| assert_different_registers(G2_thread, G5_method, Gargs, Gtmp1, Gtmp2); |
| |
| const Address Laccess_flags(Lmethod, Method::access_flags_offset()); |
| |
| const Register Glocals_size = G3; |
| assert_different_registers(Glocals_size, G4_scratch, Gframe_size); |
| |
| // make sure method is native & not abstract |
| // rethink these assertions - they can be simplified and shared (gri 2/25/2000) |
| #ifdef ASSERT |
| __ ld(G5_method, Method::access_flags_offset(), Gtmp1); |
| { |
| Label L; |
| __ btst(JVM_ACC_NATIVE, Gtmp1); |
| __ br(Assembler::notZero, false, Assembler::pt, L); |
| __ delayed()->nop(); |
| __ stop("tried to execute non-native method as native"); |
| __ bind(L); |
| } |
| { Label L; |
| __ btst(JVM_ACC_ABSTRACT, Gtmp1); |
| __ br(Assembler::zero, false, Assembler::pt, L); |
| __ delayed()->nop(); |
| __ stop("tried to execute abstract method as non-abstract"); |
| __ bind(L); |
| } |
| #endif // ASSERT |
| |
| // generate the code to allocate the interpreter stack frame |
| generate_fixed_frame(true); |
| |
| // |
| // No locals to initialize for native method |
| // |
| |
| // this slot will be set later, we initialize it to null here just in |
| // case we get a GC before the actual value is stored later |
| __ st_ptr(G0, FP, (frame::interpreter_frame_oop_temp_offset * wordSize) + STACK_BIAS); |
| |
| const Address do_not_unlock_if_synchronized(G2_thread, |
| JavaThread::do_not_unlock_if_synchronized_offset()); |
| // Since at this point in the method invocation the exception handler |
| // would try to exit the monitor of synchronized methods which hasn't |
| // been entered yet, we set the thread local variable |
| // _do_not_unlock_if_synchronized to true. If any exception was thrown by |
| // runtime, exception handling i.e. unlock_if_synchronized_method will |
| // check this thread local flag. |
| // This flag has two effects, one is to force an unwind in the topmost |
| // interpreter frame and not perform an unlock while doing so. |
| |
| __ movbool(true, G3_scratch); |
| __ stbool(G3_scratch, do_not_unlock_if_synchronized); |
| |
| // increment invocation counter and check for overflow |
| // |
| // Note: checking for negative value instead of overflow |
| // so we have a 'sticky' overflow test (may be of |
| // importance as soon as we have true MT/MP) |
| Label invocation_counter_overflow; |
| Label Lcontinue; |
| if (inc_counter) { |
| generate_counter_incr(&invocation_counter_overflow, NULL, NULL); |
| |
| } |
| __ bind(Lcontinue); |
| |
| bang_stack_shadow_pages(true); |
| |
| // reset the _do_not_unlock_if_synchronized flag |
| __ stbool(G0, do_not_unlock_if_synchronized); |
| |
| // check for synchronized methods |
| // Must happen AFTER invocation_counter check and stack overflow check, |
| // so method is not locked if overflows. |
| |
| if (synchronized) { |
| lock_method(); |
| } else { |
| #ifdef ASSERT |
| { Label ok; |
| __ ld(Laccess_flags, O0); |
| __ btst(JVM_ACC_SYNCHRONIZED, O0); |
| __ br( Assembler::zero, false, Assembler::pt, ok); |
| __ delayed()->nop(); |
| __ stop("method needs synchronization"); |
| __ bind(ok); |
| } |
| #endif // ASSERT |
| } |
| |
| |
| // start execution |
| __ verify_thread(); |
| |
| // JVMTI support |
| __ notify_method_entry(); |
| |
| // native call |
| |
| // (note that O0 is never an oop--at most it is a handle) |
| // It is important not to smash any handles created by this call, |
| // until any oop handle in O0 is dereferenced. |
| |
| // (note that the space for outgoing params is preallocated) |
| |
| // get signature handler |
| { Label L; |
| Address signature_handler(Lmethod, Method::signature_handler_offset()); |
| __ ld_ptr(signature_handler, G3_scratch); |
| __ br_notnull_short(G3_scratch, Assembler::pt, L); |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), Lmethod); |
| __ ld_ptr(signature_handler, G3_scratch); |
| __ bind(L); |
| } |
| |
| // Push a new frame so that the args will really be stored in |
| // Copy a few locals across so the new frame has the variables |
| // we need but these values will be dead at the jni call and |
| // therefore not gc volatile like the values in the current |
| // frame (Lmethod in particular) |
| |
| // Flush the method pointer to the register save area |
| __ st_ptr(Lmethod, SP, (Lmethod->sp_offset_in_saved_window() * wordSize) + STACK_BIAS); |
| __ mov(Llocals, O1); |
| |
| // calculate where the mirror handle body is allocated in the interpreter frame: |
| __ add(FP, (frame::interpreter_frame_oop_temp_offset * wordSize) + STACK_BIAS, O2); |
| |
| // Calculate current frame size |
| __ sub(SP, FP, O3); // Calculate negative of current frame size |
| __ save(SP, O3, SP); // Allocate an identical sized frame |
| |
| // Note I7 has leftover trash. Slow signature handler will fill it in |
| // should we get there. Normal jni call will set reasonable last_Java_pc |
| // below (and fix I7 so the stack trace doesn't have a meaningless frame |
| // in it). |
| |
| // Load interpreter frame's Lmethod into same register here |
| |
| __ ld_ptr(FP, (Lmethod->sp_offset_in_saved_window() * wordSize) + STACK_BIAS, Lmethod); |
| |
| __ mov(I1, Llocals); |
| __ mov(I2, Lscratch2); // save the address of the mirror |
| |
| |
| // ONLY Lmethod and Llocals are valid here! |
| |
| // call signature handler, It will move the arg properly since Llocals in current frame |
| // matches that in outer frame |
| |
| __ callr(G3_scratch, 0); |
| __ delayed()->nop(); |
| |
| // Result handler is in Lscratch |
| |
| // Reload interpreter frame's Lmethod since slow signature handler may block |
| __ ld_ptr(FP, (Lmethod->sp_offset_in_saved_window() * wordSize) + STACK_BIAS, Lmethod); |
| |
| { Label not_static; |
| |
| __ ld(Laccess_flags, O0); |
| __ btst(JVM_ACC_STATIC, O0); |
| __ br( Assembler::zero, false, Assembler::pt, not_static); |
| // get native function entry point(O0 is a good temp until the very end) |
| __ delayed()->ld_ptr(Lmethod, in_bytes(Method::native_function_offset()), O0); |
| // for static methods insert the mirror argument |
| __ load_mirror(O1, Lmethod); |
| #ifdef ASSERT |
| if (!PrintSignatureHandlers) // do not dirty the output with this |
| { Label L; |
| __ br_notnull_short(O1, Assembler::pt, L); |
| __ stop("mirror is missing"); |
| __ bind(L); |
| } |
| #endif // ASSERT |
| __ st_ptr(O1, Lscratch2, 0); |
| __ mov(Lscratch2, O1); |
| __ bind(not_static); |
| } |
| |
| // At this point, arguments have been copied off of stack into |
| // their JNI positions, which are O1..O5 and SP[68..]. |
| // Oops are boxed in-place on the stack, with handles copied to arguments. |
| // The result handler is in Lscratch. O0 will shortly hold the JNIEnv*. |
| |
| #ifdef ASSERT |
| { Label L; |
| __ br_notnull_short(O0, Assembler::pt, L); |
| __ stop("native entry point is missing"); |
| __ bind(L); |
| } |
| #endif // ASSERT |
| |
| // |
| // setup the frame anchor |
| // |
| // The scavenge function only needs to know that the PC of this frame is |
| // in the interpreter method entry code, it doesn't need to know the exact |
| // PC and hence we can use O7 which points to the return address from the |
| // previous call in the code stream (signature handler function) |
| // |
| // The other trick is we set last_Java_sp to FP instead of the usual SP because |
| // we have pushed the extra frame in order to protect the volatile register(s) |
| // in that frame when we return from the jni call |
| // |
| |
| __ set_last_Java_frame(FP, O7); |
| __ mov(O7, I7); // make dummy interpreter frame look like one above, |
| // not meaningless information that'll confuse me. |
| |
| // flush the windows now. We don't care about the current (protection) frame |
| // only the outer frames |
| |
| __ flushw(); |
| |
| // mark windows as flushed |
| Address flags(G2_thread, JavaThread::frame_anchor_offset() + JavaFrameAnchor::flags_offset()); |
| __ set(JavaFrameAnchor::flushed, G3_scratch); |
| __ st(G3_scratch, flags); |
| |
| // Transition from _thread_in_Java to _thread_in_native. We are already safepoint ready. |
| |
| Address thread_state(G2_thread, JavaThread::thread_state_offset()); |
| #ifdef ASSERT |
| { Label L; |
| __ ld(thread_state, G3_scratch); |
| __ cmp_and_br_short(G3_scratch, _thread_in_Java, Assembler::equal, Assembler::pt, L); |
| __ stop("Wrong thread state in native stub"); |
| __ bind(L); |
| } |
| #endif // ASSERT |
| __ set(_thread_in_native, G3_scratch); |
| __ st(G3_scratch, thread_state); |
| |
| // Call the jni method, using the delay slot to set the JNIEnv* argument. |
| __ save_thread(L7_thread_cache); // save Gthread |
| __ callr(O0, 0); |
| __ delayed()-> |
| add(L7_thread_cache, in_bytes(JavaThread::jni_environment_offset()), O0); |
| |
| // Back from jni method Lmethod in this frame is DEAD, DEAD, DEAD |
| |
| __ restore_thread(L7_thread_cache); // restore G2_thread |
| __ reinit_heapbase(); |
| |
| // must we block? |
| |
| // Block, if necessary, before resuming in _thread_in_Java state. |
| // In order for GC to work, don't clear the last_Java_sp until after blocking. |
| { Label no_block; |
| AddressLiteral sync_state(SafepointSynchronize::address_of_state()); |
| |
| // Switch thread to "native transition" state before reading the synchronization state. |
| // This additional state is necessary because reading and testing the synchronization |
| // state is not atomic w.r.t. GC, as this scenario demonstrates: |
| // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. |
| // VM thread changes sync state to synchronizing and suspends threads for GC. |
| // Thread A is resumed to finish this native method, but doesn't block here since it |
| // didn't see any synchronization is progress, and escapes. |
| __ set(_thread_in_native_trans, G3_scratch); |
| __ st(G3_scratch, thread_state); |
| if(os::is_MP()) { |
| if (UseMembar) { |
| // Force this write out before the read below |
| __ membar(Assembler::StoreLoad); |
| } else { |
| // Write serialization page so VM thread can do a pseudo remote membar. |
| // We use the current thread pointer to calculate a thread specific |
| // offset to write to within the page. This minimizes bus traffic |
| // due to cache line collision. |
| __ serialize_memory(G2_thread, G1_scratch, G3_scratch); |
| } |
| } |
| __ load_contents(sync_state, G3_scratch); |
| __ cmp(G3_scratch, SafepointSynchronize::_not_synchronized); |
| |
| Label L; |
| __ br(Assembler::notEqual, false, Assembler::pn, L); |
| __ delayed()->ld(G2_thread, JavaThread::suspend_flags_offset(), G3_scratch); |
| __ cmp_and_br_short(G3_scratch, 0, Assembler::equal, Assembler::pt, no_block); |
| __ bind(L); |
| |
| // Block. Save any potential method result value before the operation and |
| // use a leaf call to leave the last_Java_frame setup undisturbed. |
| save_native_result(); |
| __ call_VM_leaf(L7_thread_cache, |
| CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), |
| G2_thread); |
| |
| // Restore any method result value |
| restore_native_result(); |
| __ bind(no_block); |
| } |
| |
| // Clear the frame anchor now |
| |
| __ reset_last_Java_frame(); |
| |
| // Move the result handler address |
| __ mov(Lscratch, G3_scratch); |
| // return possible result to the outer frame |
| #ifndef __LP64 |
| __ mov(O0, I0); |
| __ restore(O1, G0, O1); |
| #else |
| __ restore(O0, G0, O0); |
| #endif /* __LP64 */ |
| |
| // Move result handler to expected register |
| __ mov(G3_scratch, Lscratch); |
| |
| // Back in normal (native) interpreter frame. State is thread_in_native_trans |
| // switch to thread_in_Java. |
| |
| __ set(_thread_in_Java, G3_scratch); |
| __ st(G3_scratch, thread_state); |
| |
| if (CheckJNICalls) { |
| // clear_pending_jni_exception_check |
| __ st_ptr(G0, G2_thread, JavaThread::pending_jni_exception_check_fn_offset()); |
| } |
| |
| // reset handle block |
| __ ld_ptr(G2_thread, JavaThread::active_handles_offset(), G3_scratch); |
| __ st(G0, G3_scratch, JNIHandleBlock::top_offset_in_bytes()); |
| |
| // If we have an oop result store it where it will be safe for any further gc |
| // until we return now that we've released the handle it might be protected by |
| |
| { |
| Label no_oop, store_result; |
| |
| __ set((intptr_t)AbstractInterpreter::result_handler(T_OBJECT), G3_scratch); |
| __ cmp_and_brx_short(G3_scratch, Lscratch, Assembler::notEqual, Assembler::pt, no_oop); |
| __ addcc(G0, O0, O0); |
| __ brx(Assembler::notZero, true, Assembler::pt, store_result); // if result is not NULL: |
| __ delayed()->ld_ptr(O0, 0, O0); // unbox it |
| __ mov(G0, O0); |
| |
| __ bind(store_result); |
| // Store it where gc will look for it and result handler expects it. |
| __ st_ptr(O0, FP, (frame::interpreter_frame_oop_temp_offset*wordSize) + STACK_BIAS); |
| |
| __ bind(no_oop); |
| |
| } |
| |
| |
| // handle exceptions (exception handling will handle unlocking!) |
| { Label L; |
| Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
| __ ld_ptr(exception_addr, Gtemp); |
| __ br_null_short(Gtemp, Assembler::pt, L); |
| // Note: This could be handled more efficiently since we know that the native |
| // method doesn't have an exception handler. We could directly return |
| // to the exception handler for the caller. |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception)); |
| __ should_not_reach_here(); |
| __ bind(L); |
| } |
| |
| // JVMTI support (preserves thread register) |
| __ notify_method_exit(true, ilgl, InterpreterMacroAssembler::NotifyJVMTI); |
| |
| if (synchronized) { |
| // save and restore any potential method result value around the unlocking operation |
| save_native_result(); |
| |
| __ add( __ top_most_monitor(), O1); |
| __ unlock_object(O1); |
| |
| restore_native_result(); |
| } |
| |
| #if defined(COMPILER2) && !defined(_LP64) |
| |
| // C2 expects long results in G1 we can't tell if we're returning to interpreted |
| // or compiled so just be safe. |
| |
| __ sllx(O0, 32, G1); // Shift bits into high G1 |
| __ srl (O1, 0, O1); // Zero extend O1 |
| __ or3 (O1, G1, G1); // OR 64 bits into G1 |
| |
| #endif /* COMPILER2 && !_LP64 */ |
| |
| // dispose of return address and remove activation |
| #ifdef ASSERT |
| { |
| Label ok; |
| __ cmp_and_brx_short(I5_savedSP, FP, Assembler::greaterEqualUnsigned, Assembler::pt, ok); |
| __ stop("bad I5_savedSP value"); |
| __ should_not_reach_here(); |
| __ bind(ok); |
| } |
| #endif |
| __ jmp(Lscratch, 0); |
| __ delayed()->nop(); |
| |
| |
| if (inc_counter) { |
| // handle invocation counter overflow |
| __ bind(invocation_counter_overflow); |
| generate_counter_overflow(Lcontinue); |
| } |
| |
| |
| |
| return entry; |
| } |
| |
| |
| // Generic method entry to (asm) interpreter |
| address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { |
| address entry = __ pc(); |
| |
| bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; |
| |
| // the following temporary registers are used during frame creation |
| const Register Gtmp1 = G3_scratch ; |
| const Register Gtmp2 = G1_scratch; |
| |
| // make sure registers are different! |
| assert_different_registers(G2_thread, G5_method, Gargs, Gtmp1, Gtmp2); |
| |
| const Address constMethod (G5_method, Method::const_offset()); |
| // Seems like G5_method is live at the point this is used. So we could make this look consistent |
| // and use in the asserts. |
| const Address access_flags (Lmethod, Method::access_flags_offset()); |
| |
| const Register Glocals_size = G3; |
| assert_different_registers(Glocals_size, G4_scratch, Gframe_size); |
| |
| // make sure method is not native & not abstract |
| // rethink these assertions - they can be simplified and shared (gri 2/25/2000) |
| #ifdef ASSERT |
| __ ld(G5_method, Method::access_flags_offset(), Gtmp1); |
| { |
| Label L; |
| __ btst(JVM_ACC_NATIVE, Gtmp1); |
| __ br(Assembler::zero, false, Assembler::pt, L); |
| __ delayed()->nop(); |
| __ stop("tried to execute native method as non-native"); |
| __ bind(L); |
| } |
| { Label L; |
| __ btst(JVM_ACC_ABSTRACT, Gtmp1); |
| __ br(Assembler::zero, false, Assembler::pt, L); |
| __ delayed()->nop(); |
| __ stop("tried to execute abstract method as non-abstract"); |
| __ bind(L); |
| } |
| #endif // ASSERT |
| |
| // generate the code to allocate the interpreter stack frame |
| |
| generate_fixed_frame(false); |
| |
| #ifdef FAST_DISPATCH |
| __ set((intptr_t)Interpreter::dispatch_table(), IdispatchTables); |
| // set bytecode dispatch table base |
| #endif |
| |
| // |
| // Code to initialize the extra (i.e. non-parm) locals |
| // |
| Register init_value = noreg; // will be G0 if we must clear locals |
| // The way the code was setup before zerolocals was always true for vanilla java entries. |
| // It could only be false for the specialized entries like accessor or empty which have |
| // no extra locals so the testing was a waste of time and the extra locals were always |
| // initialized. We removed this extra complication to already over complicated code. |
| |
| init_value = G0; |
| Label clear_loop; |
| |
| const Register RconstMethod = O1; |
| const Address size_of_parameters(RconstMethod, ConstMethod::size_of_parameters_offset()); |
| const Address size_of_locals (RconstMethod, ConstMethod::size_of_locals_offset()); |
| |
| // NOTE: If you change the frame layout, this code will need to |
| // be updated! |
| __ ld_ptr( constMethod, RconstMethod ); |
| __ lduh( size_of_locals, O2 ); |
| __ lduh( size_of_parameters, O1 ); |
| __ sll( O2, Interpreter::logStackElementSize, O2); |
| __ sll( O1, Interpreter::logStackElementSize, O1 ); |
| __ sub( Llocals, O2, O2 ); |
| __ sub( Llocals, O1, O1 ); |
| |
| __ bind( clear_loop ); |
| __ inc( O2, wordSize ); |
| |
| __ cmp( O2, O1 ); |
| __ brx( Assembler::lessEqualUnsigned, true, Assembler::pt, clear_loop ); |
| __ delayed()->st_ptr( init_value, O2, 0 ); |
| |
| const Address do_not_unlock_if_synchronized(G2_thread, |
| JavaThread::do_not_unlock_if_synchronized_offset()); |
| // Since at this point in the method invocation the exception handler |
| // would try to exit the monitor of synchronized methods which hasn't |
| // been entered yet, we set the thread local variable |
| // _do_not_unlock_if_synchronized to true. If any exception was thrown by |
| // runtime, exception handling i.e. unlock_if_synchronized_method will |
| // check this thread local flag. |
| __ movbool(true, G3_scratch); |
| __ stbool(G3_scratch, do_not_unlock_if_synchronized); |
| |
| __ profile_parameters_type(G1_scratch, G3_scratch, G4_scratch, Lscratch); |
| // increment invocation counter and check for overflow |
| // |
| // Note: checking for negative value instead of overflow |
| // so we have a 'sticky' overflow test (may be of |
| // importance as soon as we have true MT/MP) |
| Label invocation_counter_overflow; |
| Label profile_method; |
| Label profile_method_continue; |
| Label Lcontinue; |
| if (inc_counter) { |
| generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue); |
| if (ProfileInterpreter) { |
| __ bind(profile_method_continue); |
| } |
| } |
| __ bind(Lcontinue); |
| |
| bang_stack_shadow_pages(false); |
| |
| // reset the _do_not_unlock_if_synchronized flag |
| __ stbool(G0, do_not_unlock_if_synchronized); |
| |
| // check for synchronized methods |
| // Must happen AFTER invocation_counter check and stack overflow check, |
| // so method is not locked if overflows. |
| |
| if (synchronized) { |
| lock_method(); |
| } else { |
| #ifdef ASSERT |
| { Label ok; |
| __ ld(access_flags, O0); |
| __ btst(JVM_ACC_SYNCHRONIZED, O0); |
| __ br( Assembler::zero, false, Assembler::pt, ok); |
| __ delayed()->nop(); |
| __ stop("method needs synchronization"); |
| __ bind(ok); |
| } |
| #endif // ASSERT |
| } |
| |
| // start execution |
| |
| __ verify_thread(); |
| |
| // jvmti support |
| __ notify_method_entry(); |
| |
| // start executing instructions |
| __ dispatch_next(vtos); |
| |
| |
| if (inc_counter) { |
| if (ProfileInterpreter) { |
| // We have decided to profile this method in the interpreter |
| __ bind(profile_method); |
| |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); |
| __ set_method_data_pointer_for_bcp(); |
| __ ba_short(profile_method_continue); |
| } |
| |
| // handle invocation counter overflow |
| __ bind(invocation_counter_overflow); |
| generate_counter_overflow(Lcontinue); |
| } |
| |
| |
| return entry; |
| } |
| |
| //---------------------------------------------------------------------------------------------------- |
| // Exceptions |
| void TemplateInterpreterGenerator::generate_throw_exception() { |
| |
| // Entry point in previous activation (i.e., if the caller was interpreted) |
| Interpreter::_rethrow_exception_entry = __ pc(); |
| // O0: exception |
| |
| // entry point for exceptions thrown within interpreter code |
| Interpreter::_throw_exception_entry = __ pc(); |
| __ verify_thread(); |
| // expression stack is undefined here |
| // O0: exception, i.e. Oexception |
| // Lbcp: exception bcp |
| __ verify_oop(Oexception); |
| |
| |
| // expression stack must be empty before entering the VM in case of an exception |
| __ empty_expression_stack(); |
| // find exception handler address and preserve exception oop |
| // call C routine to find handler and jump to it |
| __ call_VM(O1, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), Oexception); |
| __ push_ptr(O1); // push exception for exception handler bytecodes |
| |
| __ JMP(O0, 0); // jump to exception handler (may be remove activation entry!) |
| __ delayed()->nop(); |
| |
| |
| // if the exception is not handled in the current frame |
| // the frame is removed and the exception is rethrown |
| // (i.e. exception continuation is _rethrow_exception) |
| // |
| // Note: At this point the bci is still the bxi for the instruction which caused |
| // the exception and the expression stack is empty. Thus, for any VM calls |
| // at this point, GC will find a legal oop map (with empty expression stack). |
| |
| // in current activation |
| // tos: exception |
| // Lbcp: exception bcp |
| |
| // |
| // JVMTI PopFrame support |
| // |
| |
| Interpreter::_remove_activation_preserving_args_entry = __ pc(); |
| Address popframe_condition_addr(G2_thread, JavaThread::popframe_condition_offset()); |
| // Set the popframe_processing bit in popframe_condition indicating that we are |
| // currently handling popframe, so that call_VMs that may happen later do not trigger new |
| // popframe handling cycles. |
| |
| __ ld(popframe_condition_addr, G3_scratch); |
| __ or3(G3_scratch, JavaThread::popframe_processing_bit, G3_scratch); |
| __ stw(G3_scratch, popframe_condition_addr); |
| |
| // Empty the expression stack, as in normal exception handling |
| __ empty_expression_stack(); |
| __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false, /* install_monitor_exception */ false); |
| |
| { |
| // Check to see whether we are returning to a deoptimized frame. |
| // (The PopFrame call ensures that the caller of the popped frame is |
| // either interpreted or compiled and deoptimizes it if compiled.) |
| // In this case, we can't call dispatch_next() after the frame is |
| // popped, but instead must save the incoming arguments and restore |
| // them after deoptimization has occurred. |
| // |
| // Note that we don't compare the return PC against the |
| // deoptimization blob's unpack entry because of the presence of |
| // adapter frames in C2. |
| Label caller_not_deoptimized; |
| __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), I7); |
| __ br_notnull_short(O0, Assembler::pt, caller_not_deoptimized); |
| |
| const Register Gtmp1 = G3_scratch; |
| const Register Gtmp2 = G1_scratch; |
| const Register RconstMethod = Gtmp1; |
| const Address constMethod(Lmethod, Method::const_offset()); |
| const Address size_of_parameters(RconstMethod, ConstMethod::size_of_parameters_offset()); |
| |
| // Compute size of arguments for saving when returning to deoptimized caller |
| __ ld_ptr(constMethod, RconstMethod); |
| __ lduh(size_of_parameters, Gtmp1); |
| __ sll(Gtmp1, Interpreter::logStackElementSize, Gtmp1); |
| __ sub(Llocals, Gtmp1, Gtmp2); |
| __ add(Gtmp2, wordSize, Gtmp2); |
| // Save these arguments |
| __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), G2_thread, Gtmp1, Gtmp2); |
| // Inform deoptimization that it is responsible for restoring these arguments |
| __ set(JavaThread::popframe_force_deopt_reexecution_bit, Gtmp1); |
| Address popframe_condition_addr(G2_thread, JavaThread::popframe_condition_offset()); |
| __ st(Gtmp1, popframe_condition_addr); |
| |
| // Return from the current method |
| // The caller's SP was adjusted upon method entry to accomodate |
| // the callee's non-argument locals. Undo that adjustment. |
| __ ret(); |
| __ delayed()->restore(I5_savedSP, G0, SP); |
| |
| __ bind(caller_not_deoptimized); |
| } |
| |
| // Clear the popframe condition flag |
| __ stw(G0 /* popframe_inactive */, popframe_condition_addr); |
| |
| // Get out of the current method (how this is done depends on the particular compiler calling |
| // convention that the interpreter currently follows) |
| // The caller's SP was adjusted upon method entry to accomodate |
| // the callee's non-argument locals. Undo that adjustment. |
| __ restore(I5_savedSP, G0, SP); |
| // The method data pointer was incremented already during |
| // call profiling. We have to restore the mdp for the current bcp. |
| if (ProfileInterpreter) { |
| __ set_method_data_pointer_for_bcp(); |
| } |
| |
| #if INCLUDE_JVMTI |
| { |
| Label L_done; |
| |
| __ ldub(Address(Lbcp, 0), G1_scratch); // Load current bytecode |
| __ cmp_and_br_short(G1_scratch, Bytecodes::_invokestatic, Assembler::notEqual, Assembler::pn, L_done); |
| |
| // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. |
| // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL. |
| |
| __ call_VM(G1_scratch, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), I0, Lmethod, Lbcp); |
| |
| __ br_null(G1_scratch, false, Assembler::pn, L_done); |
| __ delayed()->nop(); |
| |
| __ st_ptr(G1_scratch, Lesp, wordSize); |
| __ bind(L_done); |
| } |
| #endif // INCLUDE_JVMTI |
| |
| // Resume bytecode interpretation at the current bcp |
| __ dispatch_next(vtos); |
| // end of JVMTI PopFrame support |
| |
| Interpreter::_remove_activation_entry = __ pc(); |
| |
| // preserve exception over this code sequence (remove activation calls the vm, but oopmaps are not correct here) |
| __ pop_ptr(Oexception); // get exception |
| |
| // Intel has the following comment: |
| //// remove the activation (without doing throws on illegalMonitorExceptions) |
| // They remove the activation without checking for bad monitor state. |
| // %%% We should make sure this is the right semantics before implementing. |
| |
| __ set_vm_result(Oexception); |
| __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false); |
| |
| __ notify_method_exit(false, vtos, InterpreterMacroAssembler::SkipNotifyJVMTI); |
| |
| __ get_vm_result(Oexception); |
| __ verify_oop(Oexception); |
| |
| const int return_reg_adjustment = frame::pc_return_offset; |
| Address issuing_pc_addr(I7, return_reg_adjustment); |
| |
| // We are done with this activation frame; find out where to go next. |
| // The continuation point will be an exception handler, which expects |
| // the following registers set up: |
| // |
| // Oexception: exception |
| // Oissuing_pc: the local call that threw exception |
| // Other On: garbage |
| // In/Ln: the contents of the caller's register window |
| // |
| // We do the required restore at the last possible moment, because we |
| // need to preserve some state across a runtime call. |
| // (Remember that the caller activation is unknown--it might not be |
| // interpreted, so things like Lscratch are useless in the caller.) |
| |
| // Although the Intel version uses call_C, we can use the more |
| // compact call_VM. (The only real difference on SPARC is a |
| // harmlessly ignored [re]set_last_Java_frame, compared with |
| // the Intel code which lacks this.) |
| __ mov(Oexception, Oexception ->after_save()); // get exception in I0 so it will be on O0 after restore |
| __ add(issuing_pc_addr, Oissuing_pc->after_save()); // likewise set I1 to a value local to the caller |
| __ super_call_VM_leaf(L7_thread_cache, |
| CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), |
| G2_thread, Oissuing_pc->after_save()); |
| |
| // The caller's SP was adjusted upon method entry to accomodate |
| // the callee's non-argument locals. Undo that adjustment. |
| __ JMP(O0, 0); // return exception handler in caller |
| __ delayed()->restore(I5_savedSP, G0, SP); |
| |
| // (same old exception object is already in Oexception; see above) |
| // Note that an "issuing PC" is actually the next PC after the call |
| } |
| |
| |
| // |
| // JVMTI ForceEarlyReturn support |
| // |
| |
| address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { |
| address entry = __ pc(); |
| |
| __ empty_expression_stack(); |
| __ load_earlyret_value(state); |
| |
| __ ld_ptr(G2_thread, JavaThread::jvmti_thread_state_offset(), G3_scratch); |
| Address cond_addr(G3_scratch, JvmtiThreadState::earlyret_state_offset()); |
| |
| // Clear the earlyret state |
| __ stw(G0 /* JvmtiThreadState::earlyret_inactive */, cond_addr); |
| |
| __ remove_activation(state, |
| /* throw_monitor_exception */ false, |
| /* install_monitor_exception */ false); |
| |
| // The caller's SP was adjusted upon method entry to accomodate |
| // the callee's non-argument locals. Undo that adjustment. |
| __ ret(); // return to caller |
| __ delayed()->restore(I5_savedSP, G0, SP); |
| |
| return entry; |
| } // end of JVMTI ForceEarlyReturn support |
| |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Helper for vtos entry point generation |
| |
| void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) { |
| assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); |
| Label L; |
| aep = __ pc(); __ push_ptr(); __ ba_short(L); |
| fep = __ pc(); __ push_f(); __ ba_short(L); |
| dep = __ pc(); __ push_d(); __ ba_short(L); |
| lep = __ pc(); __ push_l(); __ ba_short(L); |
| iep = __ pc(); __ push_i(); |
| bep = cep = sep = iep; // there aren't any |
| vep = __ pc(); __ bind(L); // fall through |
| generate_and_dispatch(t); |
| } |
| |
| // -------------------------------------------------------------------------------- |
| |
| // Non-product code |
| #ifndef PRODUCT |
| address TemplateInterpreterGenerator::generate_trace_code(TosState state) { |
| address entry = __ pc(); |
| |
| __ push(state); |
| __ mov(O7, Lscratch); // protect return address within interpreter |
| |
| // Pass a 0 (not used in sparc) and the top of stack to the bytecode tracer |
| __ mov( Otos_l2, G3_scratch ); |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), G0, Otos_l1, G3_scratch); |
| __ mov(Lscratch, O7); // restore return address |
| __ pop(state); |
| __ retl(); |
| __ delayed()->nop(); |
| |
| return entry; |
| } |
| |
| |
| // helpers for generate_and_dispatch |
| |
| void TemplateInterpreterGenerator::count_bytecode() { |
| __ inc_counter(&BytecodeCounter::_counter_value, G3_scratch, G4_scratch); |
| } |
| |
| |
| void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { |
| __ inc_counter(&BytecodeHistogram::_counters[t->bytecode()], G3_scratch, G4_scratch); |
| } |
| |
| |
| void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { |
| AddressLiteral index (&BytecodePairHistogram::_index); |
| AddressLiteral counters((address) &BytecodePairHistogram::_counters); |
| |
| // get index, shift out old bytecode, bring in new bytecode, and store it |
| // _index = (_index >> log2_number_of_codes) | |
| // (bytecode << log2_number_of_codes); |
| |
| __ load_contents(index, G4_scratch); |
| __ srl( G4_scratch, BytecodePairHistogram::log2_number_of_codes, G4_scratch ); |
| __ set( ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes, G3_scratch ); |
| __ or3( G3_scratch, G4_scratch, G4_scratch ); |
| __ store_contents(G4_scratch, index, G3_scratch); |
| |
| // bump bucket contents |
| // _counters[_index] ++; |
| |
| __ set(counters, G3_scratch); // loads into G3_scratch |
| __ sll( G4_scratch, LogBytesPerWord, G4_scratch ); // Index is word address |
| __ add (G3_scratch, G4_scratch, G3_scratch); // Add in index |
| __ ld (G3_scratch, 0, G4_scratch); |
| __ inc (G4_scratch); |
| __ st (G4_scratch, 0, G3_scratch); |
| } |
| |
| |
| void TemplateInterpreterGenerator::trace_bytecode(Template* t) { |
| // Call a little run-time stub to avoid blow-up for each bytecode. |
| // The run-time runtime saves the right registers, depending on |
| // the tosca in-state for the given template. |
| address entry = Interpreter::trace_code(t->tos_in()); |
| guarantee(entry != NULL, "entry must have been generated"); |
| __ call(entry, relocInfo::none); |
| __ delayed()->nop(); |
| } |
| |
| |
| void TemplateInterpreterGenerator::stop_interpreter_at() { |
| AddressLiteral counter(&BytecodeCounter::_counter_value); |
| __ load_contents(counter, G3_scratch); |
| AddressLiteral stop_at(&StopInterpreterAt); |
| __ load_ptr_contents(stop_at, G4_scratch); |
| __ cmp(G3_scratch, G4_scratch); |
| __ breakpoint_trap(Assembler::equal, Assembler::icc); |
| } |
| #endif // not PRODUCT |