| /* |
| * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2014, Red Hat Inc. 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 "interpreter/bytecodeTracer.hpp" |
| #include "memory/resourceArea.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 <sys/types.h> |
| |
| #ifndef PRODUCT |
| #include "oops/method.hpp" |
| #endif // !PRODUCT |
| |
| #ifdef BUILTIN_SIM |
| #include "../../../../../../simulator/simulator.hpp" |
| #endif |
| |
| // 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 |
| int TemplateInterpreter::InterpreterCodeSize = 200 * 1024; |
| |
| #define __ _masm-> |
| |
| //----------------------------------------------------------------------------- |
| |
| extern "C" void entry(CodeBuffer*); |
| |
| //----------------------------------------------------------------------------- |
| |
| address TemplateInterpreterGenerator::generate_slow_signature_handler() { |
| address entry = __ pc(); |
| |
| __ andr(esp, esp, -16); |
| __ mov(c_rarg3, esp); |
| // rmethod |
| // rlocals |
| // c_rarg3: first stack arg - wordSize |
| |
| // adjust sp |
| __ sub(sp, c_rarg3, 18 * wordSize); |
| __ str(lr, Address(__ pre(sp, -2 * wordSize))); |
| __ call_VM(noreg, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::slow_signature_handler), |
| rmethod, rlocals, c_rarg3); |
| |
| // r0: result handler |
| |
| // Stack layout: |
| // rsp: return address <- sp |
| // 1 garbage |
| // 8 integer args (if static first is unused) |
| // 1 float/double identifiers |
| // 8 double args |
| // stack args <- esp |
| // garbage |
| // expression stack bottom |
| // bcp (NULL) |
| // ... |
| |
| // Restore LR |
| __ ldr(lr, Address(__ post(sp, 2 * wordSize))); |
| |
| // Do FP first so we can use c_rarg3 as temp |
| __ ldrw(c_rarg3, Address(sp, 9 * wordSize)); // float/double identifiers |
| |
| for (int i = 0; i < Argument::n_float_register_parameters_c; i++) { |
| const FloatRegister r = as_FloatRegister(i); |
| |
| Label d, done; |
| |
| __ tbnz(c_rarg3, i, d); |
| __ ldrs(r, Address(sp, (10 + i) * wordSize)); |
| __ b(done); |
| __ bind(d); |
| __ ldrd(r, Address(sp, (10 + i) * wordSize)); |
| __ bind(done); |
| } |
| |
| // c_rarg0 contains the result from the call of |
| // InterpreterRuntime::slow_signature_handler so we don't touch it |
| // here. It will be loaded with the JNIEnv* later. |
| __ ldr(c_rarg1, Address(sp, 1 * wordSize)); |
| for (int i = c_rarg2->encoding(); i <= c_rarg7->encoding(); i += 2) { |
| Register rm = as_Register(i), rn = as_Register(i+1); |
| __ ldp(rm, rn, Address(sp, i * wordSize)); |
| } |
| |
| __ add(sp, sp, 18 * wordSize); |
| __ ret(lr); |
| |
| return entry; |
| } |
| |
| |
| // |
| // Various method entries |
| // |
| |
| address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { |
| // rmethod: Method* |
| // r13: sender sp |
| // esp: args |
| |
| if (!InlineIntrinsics) return NULL; // Generate a vanilla entry |
| |
| // These don't need a safepoint check because they aren't virtually |
| // callable. We won't enter these intrinsics from compiled code. |
| // If in the future we added an intrinsic which was virtually callable |
| // we'd have to worry about how to safepoint so that this code is used. |
| |
| // mathematical functions inlined by compiler |
| // (interpreter must provide identical implementation |
| // in order to avoid monotonicity bugs when switching |
| // from interpreter to compiler in the middle of some |
| // computation) |
| // |
| // stack: |
| // [ arg ] <-- esp |
| // [ arg ] |
| // retaddr in lr |
| |
| address entry_point = NULL; |
| Register continuation = lr; |
| switch (kind) { |
| case Interpreter::java_lang_math_abs: |
| entry_point = __ pc(); |
| __ ldrd(v0, Address(esp)); |
| __ fabsd(v0, v0); |
| __ mov(sp, r13); // Restore caller's SP |
| break; |
| case Interpreter::java_lang_math_sqrt: |
| entry_point = __ pc(); |
| __ ldrd(v0, Address(esp)); |
| __ fsqrtd(v0, v0); |
| __ mov(sp, r13); |
| break; |
| case Interpreter::java_lang_math_sin : |
| case Interpreter::java_lang_math_cos : |
| case Interpreter::java_lang_math_tan : |
| case Interpreter::java_lang_math_log : |
| case Interpreter::java_lang_math_log10 : |
| case Interpreter::java_lang_math_exp : |
| entry_point = __ pc(); |
| __ ldrd(v0, Address(esp)); |
| __ mov(sp, r13); |
| __ mov(r19, lr); |
| continuation = r19; // The first callee-saved register |
| generate_transcendental_entry(kind, 1); |
| break; |
| case Interpreter::java_lang_math_pow : |
| entry_point = __ pc(); |
| __ mov(r19, lr); |
| continuation = r19; |
| __ ldrd(v0, Address(esp, 2 * Interpreter::stackElementSize)); |
| __ ldrd(v1, Address(esp)); |
| __ mov(sp, r13); |
| generate_transcendental_entry(kind, 2); |
| break; |
| case Interpreter::java_lang_math_fmaD : |
| if (UseFMA) { |
| entry_point = __ pc(); |
| __ ldrd(v0, Address(esp, 4 * Interpreter::stackElementSize)); |
| __ ldrd(v1, Address(esp, 2 * Interpreter::stackElementSize)); |
| __ ldrd(v2, Address(esp)); |
| __ fmaddd(v0, v0, v1, v2); |
| __ mov(sp, r13); // Restore caller's SP |
| } |
| break; |
| case Interpreter::java_lang_math_fmaF : |
| if (UseFMA) { |
| entry_point = __ pc(); |
| __ ldrs(v0, Address(esp, 2 * Interpreter::stackElementSize)); |
| __ ldrs(v1, Address(esp, Interpreter::stackElementSize)); |
| __ ldrs(v2, Address(esp)); |
| __ fmadds(v0, v0, v1, v2); |
| __ mov(sp, r13); // Restore caller's SP |
| } |
| break; |
| default: |
| ; |
| } |
| if (entry_point) { |
| __ br(continuation); |
| } |
| |
| return entry_point; |
| } |
| |
| // double trigonometrics and transcendentals |
| // static jdouble dsin(jdouble x); |
| // static jdouble dcos(jdouble x); |
| // static jdouble dtan(jdouble x); |
| // static jdouble dlog(jdouble x); |
| // static jdouble dlog10(jdouble x); |
| // static jdouble dexp(jdouble x); |
| // static jdouble dpow(jdouble x, jdouble y); |
| |
| void TemplateInterpreterGenerator::generate_transcendental_entry(AbstractInterpreter::MethodKind kind, int fpargs) { |
| address fn; |
| switch (kind) { |
| case Interpreter::java_lang_math_sin : |
| fn = CAST_FROM_FN_PTR(address, SharedRuntime::dsin); |
| break; |
| case Interpreter::java_lang_math_cos : |
| fn = CAST_FROM_FN_PTR(address, SharedRuntime::dcos); |
| break; |
| case Interpreter::java_lang_math_tan : |
| fn = CAST_FROM_FN_PTR(address, SharedRuntime::dtan); |
| break; |
| case Interpreter::java_lang_math_log : |
| fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog); |
| break; |
| case Interpreter::java_lang_math_log10 : |
| fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10); |
| break; |
| case Interpreter::java_lang_math_exp : |
| fn = CAST_FROM_FN_PTR(address, SharedRuntime::dexp); |
| break; |
| case Interpreter::java_lang_math_pow : |
| fpargs = 2; |
| fn = CAST_FROM_FN_PTR(address, SharedRuntime::dpow); |
| break; |
| default: |
| ShouldNotReachHere(); |
| fn = NULL; // unreachable |
| } |
| const int gpargs = 0, rtype = 3; |
| __ mov(rscratch1, fn); |
| __ blrt(rscratch1, gpargs, fpargs, rtype); |
| } |
| |
| // Abstract method entry |
| // Attempt to execute abstract method. Throw exception |
| address TemplateInterpreterGenerator::generate_abstract_entry(void) { |
| // rmethod: Method* |
| // r13: sender SP |
| |
| address entry_point = __ pc(); |
| |
| // abstract method entry |
| |
| // pop return address, reset last_sp to NULL |
| __ empty_expression_stack(); |
| __ restore_bcp(); // bcp must be correct for exception handler (was destroyed) |
| __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) |
| |
| // 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_point; |
| } |
| |
| address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { |
| address entry = __ pc(); |
| |
| #ifdef ASSERT |
| { |
| Label L; |
| __ ldr(rscratch1, Address(rfp, |
| frame::interpreter_frame_monitor_block_top_offset * |
| wordSize)); |
| __ mov(rscratch2, sp); |
| __ cmp(rscratch1, rscratch2); // maximal rsp for current rfp (stack |
| // grows negative) |
| __ br(Assembler::HS, L); // check if frame is complete |
| __ stop ("interpreter frame not set up"); |
| __ bind(L); |
| } |
| #endif // ASSERT |
| // Restore bcp under the assumption that the current frame is still |
| // interpreted |
| __ restore_bcp(); |
| |
| // expression stack must be empty before entering the VM if an |
| // exception happened |
| __ empty_expression_stack(); |
| // throw exception |
| __ call_VM(noreg, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::throw_StackOverflowError)); |
| 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(); |
| // setup parameters |
| // ??? convention: expect aberrant index in register r1 |
| __ movw(c_rarg2, r1); |
| __ mov(c_rarg1, (address)name); |
| __ call_VM(noreg, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime:: |
| throw_ArrayIndexOutOfBoundsException), |
| c_rarg1, c_rarg2); |
| return entry; |
| } |
| |
| address TemplateInterpreterGenerator::generate_ClassCastException_handler() { |
| address entry = __ pc(); |
| |
| // object is at TOS |
| __ pop(c_rarg1); |
| |
| // expression stack must be empty before entering the VM if an |
| // exception happened |
| __ empty_expression_stack(); |
| |
| __ call_VM(noreg, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime:: |
| throw_ClassCastException), |
| c_rarg1); |
| return entry; |
| } |
| |
| 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(); |
| if (pass_oop) { |
| // object is at TOS |
| __ pop(c_rarg2); |
| } |
| // expression stack must be empty before entering the VM if an |
| // exception happened |
| __ empty_expression_stack(); |
| // setup parameters |
| __ lea(c_rarg1, Address((address)name)); |
| if (pass_oop) { |
| __ call_VM(r0, CAST_FROM_FN_PTR(address, |
| InterpreterRuntime:: |
| create_klass_exception), |
| c_rarg1, c_rarg2); |
| } else { |
| // kind of lame ExternalAddress can't take NULL because |
| // external_word_Relocation will assert. |
| if (message != NULL) { |
| __ lea(c_rarg2, Address((address)message)); |
| } else { |
| __ mov(c_rarg2, NULL_WORD); |
| } |
| __ call_VM(r0, |
| CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), |
| c_rarg1, c_rarg2); |
| } |
| // throw exception |
| __ b(address(Interpreter::throw_exception_entry())); |
| return entry; |
| } |
| |
| address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { |
| address entry = __ pc(); |
| // NULL last_sp until next java call |
| __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); |
| __ dispatch_next(state); |
| return entry; |
| } |
| |
| address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { |
| address entry = __ pc(); |
| |
| // Restore stack bottom in case i2c adjusted stack |
| __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); |
| // and NULL it as marker that esp is now tos until next java call |
| __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); |
| __ restore_bcp(); |
| __ restore_locals(); |
| __ restore_constant_pool_cache(); |
| __ get_method(rmethod); |
| |
| // Pop N words from the stack |
| __ get_cache_and_index_at_bcp(r1, r2, 1, index_size); |
| __ ldr(r1, Address(r1, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())); |
| __ andr(r1, r1, ConstantPoolCacheEntry::parameter_size_mask); |
| |
| __ add(esp, esp, r1, Assembler::LSL, 3); |
| |
| // Restore machine SP |
| __ ldr(rscratch1, Address(rmethod, Method::const_offset())); |
| __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset())); |
| __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2); |
| __ ldr(rscratch2, |
| Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize)); |
| __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3); |
| __ andr(sp, rscratch1, -16); |
| |
| #ifndef PRODUCT |
| // tell the simulator that the method has been reentered |
| if (NotifySimulator) { |
| __ notify(Assembler::method_reentry); |
| } |
| #endif |
| __ get_dispatch(); |
| __ dispatch_next(state, step); |
| |
| return entry; |
| } |
| |
| address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, |
| int step) { |
| address entry = __ pc(); |
| __ restore_bcp(); |
| __ restore_locals(); |
| __ restore_constant_pool_cache(); |
| __ get_method(rmethod); |
| __ get_dispatch(); |
| |
| // Calculate stack limit |
| __ ldr(rscratch1, Address(rmethod, Method::const_offset())); |
| __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset())); |
| __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2); |
| __ ldr(rscratch2, |
| Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize)); |
| __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3); |
| __ andr(sp, rscratch1, -16); |
| |
| // Restore expression stack pointer |
| __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); |
| // NULL last_sp until next java call |
| __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); |
| |
| #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; |
| __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); |
| __ cbz(rscratch1, L); |
| // Clear flag. |
| __ strb(zr, Address(rthread, JavaThread::pending_monitorenter_offset())); |
| // Take lock. |
| lock_method(); |
| __ bind(L); |
| } else { |
| #ifdef ASSERT |
| if (UseJVMCICompiler) { |
| Label L; |
| __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); |
| __ cbz(rscratch1, L); |
| __ stop("unexpected pending monitor in deopt entry"); |
| __ bind(L); |
| } |
| #endif |
| } |
| #endif |
| // handle exceptions |
| { |
| Label L; |
| __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); |
| __ cbz(rscratch1, 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; |
| } |
| |
| address TemplateInterpreterGenerator::generate_result_handler_for( |
| BasicType type) { |
| address entry = __ pc(); |
| switch (type) { |
| case T_BOOLEAN: __ uxtb(r0, r0); break; |
| case T_CHAR : __ uxth(r0, r0); break; |
| case T_BYTE : __ sxtb(r0, r0); break; |
| case T_SHORT : __ sxth(r0, r0); break; |
| case T_INT : __ uxtw(r0, r0); break; // FIXME: We almost certainly don't need this |
| case T_LONG : /* nothing to do */ break; |
| case T_VOID : /* nothing to do */ break; |
| case T_FLOAT : /* nothing to do */ break; |
| case T_DOUBLE : /* nothing to do */ break; |
| case T_OBJECT : |
| // retrieve result from frame |
| __ ldr(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize)); |
| // and verify it |
| __ verify_oop(r0); |
| break; |
| default : ShouldNotReachHere(); |
| } |
| __ ret(lr); // return from result handler |
| return entry; |
| } |
| |
| address TemplateInterpreterGenerator::generate_safept_entry_for( |
| TosState state, |
| address runtime_entry) { |
| address entry = __ pc(); |
| __ push(state); |
| __ call_VM(noreg, runtime_entry); |
| __ membar(Assembler::AnyAny); |
| __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); |
| 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 |
| // |
| // rmethod: method |
| // |
| void TemplateInterpreterGenerator::generate_counter_incr( |
| Label* overflow, |
| Label* profile_method, |
| Label* profile_method_continue) { |
| Label done; |
| // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not. |
| if (TieredCompilation) { |
| int increment = InvocationCounter::count_increment; |
| Label no_mdo; |
| if (ProfileInterpreter) { |
| // Are we profiling? |
| __ ldr(r0, Address(rmethod, Method::method_data_offset())); |
| __ cbz(r0, no_mdo); |
| // Increment counter in the MDO |
| const Address mdo_invocation_counter(r0, in_bytes(MethodData::invocation_counter_offset()) + |
| in_bytes(InvocationCounter::counter_offset())); |
| const Address mask(r0, in_bytes(MethodData::invoke_mask_offset())); |
| __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rscratch1, rscratch2, false, Assembler::EQ, overflow); |
| __ b(done); |
| } |
| __ bind(no_mdo); |
| // Increment counter in MethodCounters |
| const Address invocation_counter(rscratch2, |
| MethodCounters::invocation_counter_offset() + |
| InvocationCounter::counter_offset()); |
| __ get_method_counters(rmethod, rscratch2, done); |
| const Address mask(rscratch2, in_bytes(MethodCounters::invoke_mask_offset())); |
| __ increment_mask_and_jump(invocation_counter, increment, mask, rscratch1, r1, false, Assembler::EQ, overflow); |
| __ bind(done); |
| } else { // not TieredCompilation |
| const Address backedge_counter(rscratch2, |
| MethodCounters::backedge_counter_offset() + |
| InvocationCounter::counter_offset()); |
| const Address invocation_counter(rscratch2, |
| MethodCounters::invocation_counter_offset() + |
| InvocationCounter::counter_offset()); |
| |
| __ get_method_counters(rmethod, rscratch2, done); |
| |
| if (ProfileInterpreter) { // %%% Merge this into MethodData* |
| __ ldrw(r1, Address(rscratch2, MethodCounters::interpreter_invocation_counter_offset())); |
| __ addw(r1, r1, 1); |
| __ strw(r1, Address(rscratch2, MethodCounters::interpreter_invocation_counter_offset())); |
| } |
| // Update standard invocation counters |
| __ ldrw(r1, invocation_counter); |
| __ ldrw(r0, backedge_counter); |
| |
| __ addw(r1, r1, InvocationCounter::count_increment); |
| __ andw(r0, r0, InvocationCounter::count_mask_value); |
| |
| __ strw(r1, invocation_counter); |
| __ addw(r0, r0, r1); // add both counters |
| |
| // profile_method is non-null only for interpreted method so |
| // profile_method != NULL == !native_call |
| |
| if (ProfileInterpreter && profile_method != NULL) { |
| // Test to see if we should create a method data oop |
| __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset())); |
| __ ldrw(rscratch2, Address(rscratch2, in_bytes(MethodCounters::interpreter_profile_limit_offset()))); |
| __ cmpw(r0, rscratch2); |
| __ br(Assembler::LT, *profile_method_continue); |
| |
| // if no method data exists, go to profile_method |
| __ test_method_data_pointer(rscratch2, *profile_method); |
| } |
| |
| { |
| __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset())); |
| __ ldrw(rscratch2, Address(rscratch2, in_bytes(MethodCounters::interpreter_invocation_limit_offset()))); |
| __ cmpw(r0, rscratch2); |
| __ br(Assembler::HS, *overflow); |
| } |
| __ bind(done); |
| } |
| } |
| |
| void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) { |
| |
| // Asm interpreter on entry |
| // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] |
| // Everything as it was on entry |
| |
| // InterpreterRuntime::frequency_counter_overflow takes two |
| // arguments, the first (thread) is passed by call_VM, the second |
| // indicates if the counter overflow occurs at a backwards branch |
| // (NULL bcp). We pass zero for it. 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). |
| __ mov(c_rarg1, 0); |
| __ call_VM(noreg, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::frequency_counter_overflow), |
| c_rarg1); |
| |
| __ b(do_continue); |
| } |
| |
| // 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. |
| // The expression stack grows down incrementally, so the normal guard |
| // page mechanism will work for that. |
| // |
| // NOTE: Since the additional locals are also always pushed (wasn't |
| // obvious in generate_method_entry) so the guard should work for them |
| // too. |
| // |
| // Args: |
| // r3: number of additional locals this frame needs (what we must check) |
| // rmethod: Method* |
| // |
| // Kills: |
| // r0 |
| void TemplateInterpreterGenerator::generate_stack_overflow_check(void) { |
| |
| // monitor entry size: see picture of stack set |
| // (generate_method_entry) and frame_amd64.hpp |
| const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; |
| |
| // total overhead size: entry_size + (saved rbp through expr stack |
| // bottom). be sure to change this if you add/subtract anything |
| // to/from the overhead area |
| const int overhead_size = |
| -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size; |
| |
| const int page_size = os::vm_page_size(); |
| |
| Label after_frame_check; |
| |
| // see if the frame is greater than one page in size. If so, |
| // then we need to verify there is enough stack space remaining |
| // for the additional locals. |
| // |
| // Note that we use SUBS rather than CMP here because the immediate |
| // field of this instruction may overflow. SUBS can cope with this |
| // because it is a macro that will expand to some number of MOV |
| // instructions and a register operation. |
| __ subs(rscratch1, r3, (page_size - overhead_size) / Interpreter::stackElementSize); |
| __ br(Assembler::LS, after_frame_check); |
| |
| // compute rsp as if this were going to be the last frame on |
| // the stack before the red zone |
| |
| // locals + overhead, in bytes |
| __ mov(r0, overhead_size); |
| __ add(r0, r0, r3, Assembler::LSL, Interpreter::logStackElementSize); // 2 slots per parameter. |
| |
| const Address stack_limit(rthread, JavaThread::stack_overflow_limit_offset()); |
| __ ldr(rscratch1, stack_limit); |
| |
| #ifdef ASSERT |
| Label limit_okay; |
| // Verify that thread stack limit is non-zero. |
| __ cbnz(rscratch1, limit_okay); |
| __ stop("stack overflow limit is zero"); |
| __ bind(limit_okay); |
| #endif |
| |
| // Add stack limit to locals. |
| __ add(r0, r0, rscratch1); |
| |
| // Check against the current stack bottom. |
| __ cmp(sp, r0); |
| __ br(Assembler::HI, after_frame_check); |
| |
| // Remove the incoming args, peeling the machine SP back to where it |
| // was in the caller. This is not strictly necessary, but unless we |
| // do so the stack frame may have a garbage FP; this ensures a |
| // correct call stack that we can always unwind. The ANDR should be |
| // unnecessary because the sender SP in r13 is always aligned, but |
| // it doesn't hurt. |
| __ andr(sp, r13, -16); |
| |
| // Note: 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"); |
| __ far_jump(RuntimeAddress(StubRoutines::throw_StackOverflowError_entry())); |
| |
| // all done with frame size check |
| __ bind(after_frame_check); |
| } |
| |
| // Allocate monitor and lock method (asm interpreter) |
| // |
| // Args: |
| // rmethod: Method* |
| // rlocals: locals |
| // |
| // Kills: |
| // r0 |
| // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs) |
| // rscratch1, rscratch2 (scratch regs) |
| void TemplateInterpreterGenerator::lock_method() { |
| // synchronize method |
| const Address access_flags(rmethod, Method::access_flags_offset()); |
| const Address monitor_block_top( |
| rfp, |
| frame::interpreter_frame_monitor_block_top_offset * wordSize); |
| const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; |
| |
| #ifdef ASSERT |
| { |
| Label L; |
| __ ldrw(r0, access_flags); |
| __ tst(r0, JVM_ACC_SYNCHRONIZED); |
| __ br(Assembler::NE, L); |
| __ stop("method doesn't need synchronization"); |
| __ bind(L); |
| } |
| #endif // ASSERT |
| |
| // get synchronization object |
| { |
| Label done; |
| __ ldrw(r0, access_flags); |
| __ tst(r0, JVM_ACC_STATIC); |
| // get receiver (assume this is frequent case) |
| __ ldr(r0, Address(rlocals, Interpreter::local_offset_in_bytes(0))); |
| __ br(Assembler::EQ, done); |
| __ load_mirror(r0, rmethod); |
| |
| #ifdef ASSERT |
| { |
| Label L; |
| __ cbnz(r0, L); |
| __ stop("synchronization object is NULL"); |
| __ bind(L); |
| } |
| #endif // ASSERT |
| |
| __ bind(done); |
| } |
| |
| // add space for monitor & lock |
| __ sub(sp, sp, entry_size); // add space for a monitor entry |
| __ sub(esp, esp, entry_size); |
| __ mov(rscratch1, esp); |
| __ str(rscratch1, monitor_block_top); // set new monitor block top |
| // store object |
| __ str(r0, Address(esp, BasicObjectLock::obj_offset_in_bytes())); |
| __ mov(c_rarg1, esp); // object address |
| __ lock_object(c_rarg1); |
| } |
| |
| // Generate a fixed interpreter frame. This is identical setup for |
| // interpreted methods and for native methods hence the shared code. |
| // |
| // Args: |
| // lr: return address |
| // rmethod: Method* |
| // rlocals: pointer to locals |
| // rcpool: cp cache |
| // stack_pointer: previous sp |
| void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { |
| // initialize fixed part of activation frame |
| if (native_call) { |
| __ sub(esp, sp, 14 * wordSize); |
| __ mov(rbcp, zr); |
| __ stp(esp, zr, Address(__ pre(sp, -14 * wordSize))); |
| // add 2 zero-initialized slots for native calls |
| __ stp(zr, zr, Address(sp, 12 * wordSize)); |
| } else { |
| __ sub(esp, sp, 12 * wordSize); |
| __ ldr(rscratch1, Address(rmethod, Method::const_offset())); // get ConstMethod |
| __ add(rbcp, rscratch1, in_bytes(ConstMethod::codes_offset())); // get codebase |
| __ stp(esp, rbcp, Address(__ pre(sp, -12 * wordSize))); |
| } |
| |
| if (ProfileInterpreter) { |
| Label method_data_continue; |
| __ ldr(rscratch1, Address(rmethod, Method::method_data_offset())); |
| __ cbz(rscratch1, method_data_continue); |
| __ lea(rscratch1, Address(rscratch1, in_bytes(MethodData::data_offset()))); |
| __ bind(method_data_continue); |
| __ stp(rscratch1, rmethod, Address(sp, 6 * wordSize)); // save Method* and mdp (method data pointer) |
| } else { |
| __ stp(zr, rmethod, Address(sp, 6 * wordSize)); // save Method* (no mdp) |
| } |
| |
| // Get mirror and store it in the frame as GC root for this Method* |
| __ load_mirror(rscratch1, rmethod); |
| __ stp(rscratch1, zr, Address(sp, 4 * wordSize)); |
| |
| __ ldr(rcpool, Address(rmethod, Method::const_offset())); |
| __ ldr(rcpool, Address(rcpool, ConstMethod::constants_offset())); |
| __ ldr(rcpool, Address(rcpool, ConstantPool::cache_offset_in_bytes())); |
| __ stp(rlocals, rcpool, Address(sp, 2 * wordSize)); |
| |
| __ stp(rfp, lr, Address(sp, 10 * wordSize)); |
| __ lea(rfp, Address(sp, 10 * wordSize)); |
| |
| // set sender sp |
| // leave last_sp as null |
| __ stp(zr, r13, Address(sp, 8 * wordSize)); |
| |
| // Move SP out of the way |
| if (! native_call) { |
| __ ldr(rscratch1, Address(rmethod, Method::const_offset())); |
| __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset())); |
| __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2); |
| __ sub(rscratch1, sp, rscratch1, ext::uxtw, 3); |
| __ andr(sp, rscratch1, -16); |
| } |
| } |
| |
| // End of helpers |
| |
| // Various method entries |
| //------------------------------------------------------------------------------------------------------------------------ |
| // |
| // |
| |
| // 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_entry. |
| // |
| // rmethod: Method* |
| // r13: senderSP must preserve for slow path, set SP to it on fast path |
| |
| 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; |
| const Register local_0 = c_rarg0; |
| // Check if local 0 != NULL |
| // If the receiver is null then it is OK to jump to the slow path. |
| __ ldr(local_0, Address(esp, 0)); |
| __ cbz(local_0, slow_path); |
| |
| // Load the value of the referent field. |
| const Address field_address(local_0, referent_offset); |
| __ load_heap_oop(local_0, field_address); |
| |
| __ mov(r19, r13); // Move senderSP to a callee-saved register |
| // Generate the G1 pre-barrier code to log the value of |
| // the referent field in an SATB buffer. |
| __ enter(); // g1_write may call runtime |
| __ g1_write_barrier_pre(noreg /* obj */, |
| local_0 /* pre_val */, |
| rthread /* thread */, |
| rscratch2 /* tmp */, |
| true /* tosca_live */, |
| true /* expand_call */); |
| __ leave(); |
| // areturn |
| __ andr(sp, r19, -16); // done with stack |
| __ ret(lr); |
| |
| // generate a vanilla interpreter entry as the slow path |
| __ 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(); |
| |
| // rmethod: Method* |
| // r13: senderSP must preserved for slow path |
| // esp: args |
| |
| Label slow_path; |
| // If we need a safepoint check, generate full interpreter entry. |
| ExternalAddress state(SafepointSynchronize::address_of_state()); |
| unsigned long offset; |
| __ adrp(rscratch1, ExternalAddress(SafepointSynchronize::address_of_state()), offset); |
| __ ldrw(rscratch1, Address(rscratch1, offset)); |
| assert(SafepointSynchronize::_not_synchronized == 0, "rewrite this code"); |
| __ cbnz(rscratch1, slow_path); |
| |
| // We don't generate local frame and don't align stack because |
| // we call stub code and there is no safepoint on this path. |
| |
| // Load parameters |
| const Register crc = c_rarg0; // crc |
| const Register val = c_rarg1; // source java byte value |
| const Register tbl = c_rarg2; // scratch |
| |
| // Arguments are reversed on java expression stack |
| __ ldrw(val, Address(esp, 0)); // byte value |
| __ ldrw(crc, Address(esp, wordSize)); // Initial CRC |
| |
| __ adrp(tbl, ExternalAddress(StubRoutines::crc_table_addr()), offset); |
| __ add(tbl, tbl, offset); |
| |
| __ ornw(crc, zr, crc); // ~crc |
| __ update_byte_crc32(crc, val, tbl); |
| __ ornw(crc, zr, crc); // ~crc |
| |
| // result in c_rarg0 |
| |
| __ andr(sp, r13, -16); |
| __ ret(lr); |
| |
| // generate a vanilla native entry as the slow path |
| __ bind(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(); |
| |
| // rmethod,: Method* |
| // r13: senderSP must preserved for slow path |
| |
| Label slow_path; |
| // If we need a safepoint check, generate full interpreter entry. |
| ExternalAddress state(SafepointSynchronize::address_of_state()); |
| unsigned long offset; |
| __ adrp(rscratch1, ExternalAddress(SafepointSynchronize::address_of_state()), offset); |
| __ ldrw(rscratch1, Address(rscratch1, offset)); |
| assert(SafepointSynchronize::_not_synchronized == 0, "rewrite this code"); |
| __ cbnz(rscratch1, slow_path); |
| |
| // We don't generate local frame and don't align stack because |
| // we call stub code and there is no safepoint on this path. |
| |
| // Load parameters |
| const Register crc = c_rarg0; // crc |
| const Register buf = c_rarg1; // source java byte array address |
| const Register len = c_rarg2; // length |
| const Register off = len; // offset (never overlaps with 'len') |
| |
| // Arguments are reversed on java expression stack |
| // Calculate address of start element |
| if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { |
| __ ldr(buf, Address(esp, 2*wordSize)); // long buf |
| __ ldrw(off, Address(esp, wordSize)); // offset |
| __ add(buf, buf, off); // + offset |
| __ ldrw(crc, Address(esp, 4*wordSize)); // Initial CRC |
| } else { |
| __ ldr(buf, Address(esp, 2*wordSize)); // byte[] array |
| __ add(buf, buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size |
| __ ldrw(off, Address(esp, wordSize)); // offset |
| __ add(buf, buf, off); // + offset |
| __ ldrw(crc, Address(esp, 3*wordSize)); // Initial CRC |
| } |
| // Can now load 'len' since we're finished with 'off' |
| __ ldrw(len, Address(esp, 0x0)); // Length |
| |
| __ andr(sp, r13, -16); // Restore the caller's SP |
| |
| // We are frameless so we can just jump to the stub. |
| __ b(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32())); |
| |
| // generate a vanilla native entry as the slow path |
| __ bind(slow_path); |
| __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native)); |
| return entry; |
| } |
| return NULL; |
| } |
| |
| // Not supported |
| address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) { |
| return NULL; |
| } |
| |
| void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { |
| // 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 n_shadow_pages = JavaThread::stack_shadow_zone_size() / os::vm_page_size(); |
| const int start_page = native_call ? n_shadow_pages : 1; |
| const int page_size = os::vm_page_size(); |
| for (int pages = start_page; pages <= n_shadow_pages ; pages++) { |
| __ sub(rscratch2, sp, pages*page_size); |
| __ str(zr, Address(rscratch2)); |
| } |
| } |
| } |
| |
| |
| // 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) { |
| // determine code generation flags |
| bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; |
| |
| // r1: Method* |
| // rscratch1: sender sp |
| |
| address entry_point = __ pc(); |
| |
| const Address constMethod (rmethod, Method::const_offset()); |
| const Address access_flags (rmethod, Method::access_flags_offset()); |
| const Address size_of_parameters(r2, ConstMethod:: |
| size_of_parameters_offset()); |
| |
| // get parameter size (always needed) |
| __ ldr(r2, constMethod); |
| __ load_unsigned_short(r2, size_of_parameters); |
| |
| // 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. |
| |
| // rmethod: Method* |
| // r2: size of parameters |
| // rscratch1: sender sp |
| |
| // for natives the size of locals is zero |
| |
| // compute beginning of parameters (rlocals) |
| __ add(rlocals, esp, r2, ext::uxtx, 3); |
| __ add(rlocals, rlocals, -wordSize); |
| |
| // Pull SP back to minimum size: this avoids holes in the stack |
| __ andr(sp, esp, -16); |
| |
| // initialize fixed part of activation frame |
| generate_fixed_frame(true); |
| #ifndef PRODUCT |
| // tell the simulator that a method has been entered |
| if (NotifySimulator) { |
| __ notify(Assembler::method_entry); |
| } |
| #endif |
| |
| // make sure method is native & not abstract |
| #ifdef ASSERT |
| __ ldrw(r0, access_flags); |
| { |
| Label L; |
| __ tst(r0, JVM_ACC_NATIVE); |
| __ br(Assembler::NE, L); |
| __ stop("tried to execute non-native method as native"); |
| __ bind(L); |
| } |
| { |
| Label L; |
| __ tst(r0, JVM_ACC_ABSTRACT); |
| __ br(Assembler::EQ, L); |
| __ stop("tried to execute abstract method in interpreter"); |
| __ bind(L); |
| } |
| #endif |
| |
| // 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. The remove_activation |
| // will check this flag. |
| |
| const Address do_not_unlock_if_synchronized(rthread, |
| in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); |
| __ mov(rscratch2, true); |
| __ strb(rscratch2, do_not_unlock_if_synchronized); |
| |
| // increment invocation count & check for overflow |
| Label invocation_counter_overflow; |
| if (inc_counter) { |
| generate_counter_incr(&invocation_counter_overflow, NULL, NULL); |
| } |
| |
| Label continue_after_compile; |
| __ bind(continue_after_compile); |
| |
| bang_stack_shadow_pages(true); |
| |
| // reset the _do_not_unlock_if_synchronized flag |
| __ strb(zr, 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 { |
| // no synchronization necessary |
| #ifdef ASSERT |
| { |
| Label L; |
| __ ldrw(r0, access_flags); |
| __ tst(r0, JVM_ACC_SYNCHRONIZED); |
| __ br(Assembler::EQ, L); |
| __ stop("method needs synchronization"); |
| __ bind(L); |
| } |
| #endif |
| } |
| |
| // start execution |
| #ifdef ASSERT |
| { |
| Label L; |
| const Address monitor_block_top(rfp, |
| frame::interpreter_frame_monitor_block_top_offset * wordSize); |
| __ ldr(rscratch1, monitor_block_top); |
| __ cmp(esp, rscratch1); |
| __ br(Assembler::EQ, L); |
| __ stop("broken stack frame setup in interpreter"); |
| __ bind(L); |
| } |
| #endif |
| |
| // jvmti support |
| __ notify_method_entry(); |
| |
| // work registers |
| const Register t = r17; |
| const Register result_handler = r19; |
| |
| // allocate space for parameters |
| __ ldr(t, Address(rmethod, Method::const_offset())); |
| __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset())); |
| |
| __ sub(rscratch1, esp, t, ext::uxtx, Interpreter::logStackElementSize); |
| __ andr(sp, rscratch1, -16); |
| __ mov(esp, rscratch1); |
| |
| // get signature handler |
| { |
| Label L; |
| __ ldr(t, Address(rmethod, Method::signature_handler_offset())); |
| __ cbnz(t, L); |
| __ call_VM(noreg, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::prepare_native_call), |
| rmethod); |
| __ ldr(t, Address(rmethod, Method::signature_handler_offset())); |
| __ bind(L); |
| } |
| |
| // call signature handler |
| assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals, |
| "adjust this code"); |
| assert(InterpreterRuntime::SignatureHandlerGenerator::to() == sp, |
| "adjust this code"); |
| assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1, |
| "adjust this code"); |
| |
| // The generated handlers do not touch rmethod (the method). |
| // However, large signatures cannot be cached and are generated |
| // each time here. The slow-path generator can do a GC on return, |
| // so we must reload it after the call. |
| __ blr(t); |
| __ get_method(rmethod); // slow path can do a GC, reload rmethod |
| |
| |
| // result handler is in r0 |
| // set result handler |
| __ mov(result_handler, r0); |
| // pass mirror handle if static call |
| { |
| Label L; |
| __ ldrw(t, Address(rmethod, Method::access_flags_offset())); |
| __ tbz(t, exact_log2(JVM_ACC_STATIC), L); |
| // get mirror |
| __ load_mirror(t, rmethod); |
| // copy mirror into activation frame |
| __ str(t, Address(rfp, frame::interpreter_frame_oop_temp_offset * wordSize)); |
| // pass handle to mirror |
| __ add(c_rarg1, rfp, frame::interpreter_frame_oop_temp_offset * wordSize); |
| __ bind(L); |
| } |
| |
| // get native function entry point in r10 |
| { |
| Label L; |
| __ ldr(r10, Address(rmethod, Method::native_function_offset())); |
| address unsatisfied = (SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); |
| __ mov(rscratch2, unsatisfied); |
| __ ldr(rscratch2, rscratch2); |
| __ cmp(r10, rscratch2); |
| __ br(Assembler::NE, L); |
| __ call_VM(noreg, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::prepare_native_call), |
| rmethod); |
| __ get_method(rmethod); |
| __ ldr(r10, Address(rmethod, Method::native_function_offset())); |
| __ bind(L); |
| } |
| |
| // pass JNIEnv |
| __ add(c_rarg0, rthread, in_bytes(JavaThread::jni_environment_offset())); |
| |
| // It is enough that the pc() points into the right code |
| // segment. It does not have to be the correct return pc. |
| __ set_last_Java_frame(esp, rfp, (address)NULL, rscratch1); |
| |
| // change thread state |
| #ifdef ASSERT |
| { |
| Label L; |
| __ ldrw(t, Address(rthread, JavaThread::thread_state_offset())); |
| __ cmp(t, _thread_in_Java); |
| __ br(Assembler::EQ, L); |
| __ stop("Wrong thread state in native stub"); |
| __ bind(L); |
| } |
| #endif |
| |
| // Change state to native |
| __ mov(rscratch1, _thread_in_native); |
| __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset())); |
| __ stlrw(rscratch1, rscratch2); |
| |
| // Call the native method. |
| __ blrt(r10, rscratch1); |
| __ maybe_isb(); |
| __ get_method(rmethod); |
| // result potentially in r0 or v0 |
| |
| // make room for the pushes we're about to do |
| __ sub(rscratch1, esp, 4 * wordSize); |
| __ andr(sp, rscratch1, -16); |
| |
| // NOTE: The order of these pushes is known to frame::interpreter_frame_result |
| // in order to extract the result of a method call. If the order of these |
| // pushes change or anything else is added to the stack then the code in |
| // interpreter_frame_result must also change. |
| __ push(dtos); |
| __ push(ltos); |
| |
| // change thread state |
| __ mov(rscratch1, _thread_in_native_trans); |
| __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset())); |
| __ stlrw(rscratch1, rscratch2); |
| |
| if (os::is_MP()) { |
| if (UseMembar) { |
| // Force this write out before the read below |
| __ dsb(Assembler::SY); |
| } 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(rthread, rscratch2); |
| } |
| } |
| |
| // check for safepoint operation in progress and/or pending suspend requests |
| { |
| Label Continue; |
| { |
| unsigned long offset; |
| __ adrp(rscratch2, SafepointSynchronize::address_of_state(), offset); |
| __ ldrw(rscratch2, Address(rscratch2, offset)); |
| } |
| assert(SafepointSynchronize::_not_synchronized == 0, |
| "SafepointSynchronize::_not_synchronized"); |
| Label L; |
| __ cbnz(rscratch2, L); |
| __ ldrw(rscratch2, Address(rthread, JavaThread::suspend_flags_offset())); |
| __ cbz(rscratch2, Continue); |
| __ bind(L); |
| |
| // Don't use call_VM as it will see a possible pending exception |
| // and forward it and never return here preventing us from |
| // clearing _last_native_pc down below. So we do a runtime call by |
| // hand. |
| // |
| __ mov(c_rarg0, rthread); |
| __ mov(rscratch2, CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)); |
| __ blrt(rscratch2, 1, 0, 0); |
| __ maybe_isb(); |
| __ get_method(rmethod); |
| __ reinit_heapbase(); |
| __ bind(Continue); |
| } |
| |
| // change thread state |
| __ mov(rscratch1, _thread_in_Java); |
| __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset())); |
| __ stlrw(rscratch1, rscratch2); |
| |
| // reset_last_Java_frame |
| __ reset_last_Java_frame(true); |
| |
| if (CheckJNICalls) { |
| // clear_pending_jni_exception_check |
| __ str(zr, Address(rthread, JavaThread::pending_jni_exception_check_fn_offset())); |
| } |
| |
| // reset handle block |
| __ ldr(t, Address(rthread, JavaThread::active_handles_offset())); |
| __ str(zr, Address(t, JNIHandleBlock::top_offset_in_bytes())); |
| |
| // If result is an oop unbox and store it in frame where gc will see it |
| // and result handler will pick it up |
| |
| { |
| Label no_oop, store_result; |
| __ adr(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT))); |
| __ cmp(t, result_handler); |
| __ br(Assembler::NE, no_oop); |
| // retrieve result |
| __ pop(ltos); |
| __ cbz(r0, store_result); |
| __ ldr(r0, Address(r0, 0)); |
| __ bind(store_result); |
| __ str(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize)); |
| // keep stack depth as expected by pushing oop which will eventually be discarded |
| __ push(ltos); |
| __ bind(no_oop); |
| } |
| |
| { |
| Label no_reguard; |
| __ lea(rscratch1, Address(rthread, in_bytes(JavaThread::stack_guard_state_offset()))); |
| __ ldrw(rscratch1, Address(rscratch1)); |
| __ cmp(rscratch1, JavaThread::stack_guard_yellow_reserved_disabled); |
| __ br(Assembler::NE, no_reguard); |
| |
| __ pusha(); // XXX only save smashed registers |
| __ mov(c_rarg0, rthread); |
| __ mov(rscratch2, CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)); |
| __ blrt(rscratch2, 0, 0, 0); |
| __ popa(); // XXX only restore smashed registers |
| __ bind(no_reguard); |
| } |
| |
| // The method register is junk from after the thread_in_native transition |
| // until here. Also can't call_VM until the bcp has been |
| // restored. Need bcp for throwing exception below so get it now. |
| __ get_method(rmethod); |
| |
| // restore bcp to have legal interpreter frame, i.e., bci == 0 <=> |
| // rbcp == code_base() |
| __ ldr(rbcp, Address(rmethod, Method::const_offset())); // get ConstMethod* |
| __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset())); // get codebase |
| // handle exceptions (exception handling will handle unlocking!) |
| { |
| Label L; |
| __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); |
| __ cbz(rscratch1, L); |
| // Note: At some point we may want to unify this with the code |
| // used in call_VM_base(); i.e., we should use the |
| // StubRoutines::forward_exception code. For now this doesn't work |
| // here because the rsp is not correctly set at this point. |
| __ MacroAssembler::call_VM(noreg, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::throw_pending_exception)); |
| __ should_not_reach_here(); |
| __ bind(L); |
| } |
| |
| // do unlocking if necessary |
| { |
| Label L; |
| __ ldrw(t, Address(rmethod, Method::access_flags_offset())); |
| __ tbz(t, exact_log2(JVM_ACC_SYNCHRONIZED), L); |
| // the code below should be shared with interpreter macro |
| // assembler implementation |
| { |
| Label unlock; |
| // BasicObjectLock will be first in list, since this is a |
| // synchronized method. However, need to check that the object |
| // has not been unlocked by an explicit monitorexit bytecode. |
| |
| // monitor expect in c_rarg1 for slow unlock path |
| __ lea (c_rarg1, Address(rfp, // address of first monitor |
| (intptr_t)(frame::interpreter_frame_initial_sp_offset * |
| wordSize - sizeof(BasicObjectLock)))); |
| |
| __ ldr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); |
| __ cbnz(t, unlock); |
| |
| // Entry already unlocked, need to throw exception |
| __ MacroAssembler::call_VM(noreg, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::throw_illegal_monitor_state_exception)); |
| __ should_not_reach_here(); |
| |
| __ bind(unlock); |
| __ unlock_object(c_rarg1); |
| } |
| __ bind(L); |
| } |
| |
| // jvmti support |
| // Note: This must happen _after_ handling/throwing any exceptions since |
| // the exception handler code notifies the runtime of method exits |
| // too. If this happens before, method entry/exit notifications are |
| // not properly paired (was bug - gri 11/22/99). |
| __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); |
| |
| // restore potential result in r0:d0, call result handler to |
| // restore potential result in ST0 & handle result |
| |
| __ pop(ltos); |
| __ pop(dtos); |
| |
| __ blr(result_handler); |
| |
| // remove activation |
| __ ldr(esp, Address(rfp, |
| frame::interpreter_frame_sender_sp_offset * |
| wordSize)); // get sender sp |
| // remove frame anchor |
| __ leave(); |
| |
| // resture sender sp |
| __ mov(sp, esp); |
| |
| __ ret(lr); |
| |
| if (inc_counter) { |
| // Handle overflow of counter and compile method |
| __ bind(invocation_counter_overflow); |
| generate_counter_overflow(continue_after_compile); |
| } |
| |
| return entry_point; |
| } |
| |
| // |
| // Generic interpreted method entry to (asm) interpreter |
| // |
| address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { |
| // determine code generation flags |
| bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; |
| |
| // rscratch1: sender sp |
| address entry_point = __ pc(); |
| |
| const Address constMethod(rmethod, Method::const_offset()); |
| const Address access_flags(rmethod, Method::access_flags_offset()); |
| const Address size_of_parameters(r3, |
| ConstMethod::size_of_parameters_offset()); |
| const Address size_of_locals(r3, ConstMethod::size_of_locals_offset()); |
| |
| // get parameter size (always needed) |
| // need to load the const method first |
| __ ldr(r3, constMethod); |
| __ load_unsigned_short(r2, size_of_parameters); |
| |
| // r2: size of parameters |
| |
| __ load_unsigned_short(r3, size_of_locals); // get size of locals in words |
| __ sub(r3, r3, r2); // r3 = no. of additional locals |
| |
| // see if we've got enough room on the stack for locals plus overhead. |
| generate_stack_overflow_check(); |
| |
| // compute beginning of parameters (rlocals) |
| __ add(rlocals, esp, r2, ext::uxtx, 3); |
| __ sub(rlocals, rlocals, wordSize); |
| |
| // Make room for locals |
| __ sub(rscratch1, esp, r3, ext::uxtx, 3); |
| __ andr(sp, rscratch1, -16); |
| |
| // r3 - # of additional locals |
| // allocate space for locals |
| // explicitly initialize locals |
| { |
| Label exit, loop; |
| __ ands(zr, r3, r3); |
| __ br(Assembler::LE, exit); // do nothing if r3 <= 0 |
| __ bind(loop); |
| __ str(zr, Address(__ post(rscratch1, wordSize))); |
| __ sub(r3, r3, 1); // until everything initialized |
| __ cbnz(r3, loop); |
| __ bind(exit); |
| } |
| |
| // And the base dispatch table |
| __ get_dispatch(); |
| |
| // initialize fixed part of activation frame |
| generate_fixed_frame(false); |
| #ifndef PRODUCT |
| // tell the simulator that a method has been entered |
| if (NotifySimulator) { |
| __ notify(Assembler::method_entry); |
| } |
| #endif |
| // make sure method is not native & not abstract |
| #ifdef ASSERT |
| __ ldrw(r0, access_flags); |
| { |
| Label L; |
| __ tst(r0, JVM_ACC_NATIVE); |
| __ br(Assembler::EQ, L); |
| __ stop("tried to execute native method as non-native"); |
| __ bind(L); |
| } |
| { |
| Label L; |
| __ tst(r0, JVM_ACC_ABSTRACT); |
| __ br(Assembler::EQ, L); |
| __ stop("tried to execute abstract method in interpreter"); |
| __ bind(L); |
| } |
| #endif |
| |
| // 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. The remove_activation |
| // will check this flag. |
| |
| const Address do_not_unlock_if_synchronized(rthread, |
| in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); |
| __ mov(rscratch2, true); |
| __ strb(rscratch2, do_not_unlock_if_synchronized); |
| |
| // increment invocation count & check for overflow |
| Label invocation_counter_overflow; |
| Label profile_method; |
| Label profile_method_continue; |
| if (inc_counter) { |
| generate_counter_incr(&invocation_counter_overflow, |
| &profile_method, |
| &profile_method_continue); |
| if (ProfileInterpreter) { |
| __ bind(profile_method_continue); |
| } |
| } |
| |
| Label continue_after_compile; |
| __ bind(continue_after_compile); |
| |
| bang_stack_shadow_pages(false); |
| |
| // reset the _do_not_unlock_if_synchronized flag |
| __ strb(zr, 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) { |
| // Allocate monitor and lock method |
| lock_method(); |
| } else { |
| // no synchronization necessary |
| #ifdef ASSERT |
| { |
| Label L; |
| __ ldrw(r0, access_flags); |
| __ tst(r0, JVM_ACC_SYNCHRONIZED); |
| __ br(Assembler::EQ, L); |
| __ stop("method needs synchronization"); |
| __ bind(L); |
| } |
| #endif |
| } |
| |
| // start execution |
| #ifdef ASSERT |
| { |
| Label L; |
| const Address monitor_block_top (rfp, |
| frame::interpreter_frame_monitor_block_top_offset * wordSize); |
| __ ldr(rscratch1, monitor_block_top); |
| __ cmp(esp, rscratch1); |
| __ br(Assembler::EQ, L); |
| __ stop("broken stack frame setup in interpreter"); |
| __ bind(L); |
| } |
| #endif |
| |
| // jvmti support |
| __ notify_method_entry(); |
| |
| __ dispatch_next(vtos); |
| |
| // invocation counter overflow |
| 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(); |
| // don't think we need this |
| __ get_method(r1); |
| __ b(profile_method_continue); |
| } |
| // Handle overflow of counter and compile method |
| __ bind(invocation_counter_overflow); |
| generate_counter_overflow(continue_after_compile); |
| } |
| |
| return entry_point; |
| } |
| |
| //----------------------------------------------------------------------------- |
| // Exceptions |
| |
| void TemplateInterpreterGenerator::generate_throw_exception() { |
| // Entry point in previous activation (i.e., if the caller was |
| // interpreted) |
| Interpreter::_rethrow_exception_entry = __ pc(); |
| // Restore sp to interpreter_frame_last_sp even though we are going |
| // to empty the expression stack for the exception processing. |
| __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); |
| // r0: exception |
| // r3: return address/pc that threw exception |
| __ restore_bcp(); // rbcp points to call/send |
| __ restore_locals(); |
| __ restore_constant_pool_cache(); |
| __ reinit_heapbase(); // restore rheapbase as heapbase. |
| __ get_dispatch(); |
| |
| #ifndef PRODUCT |
| // tell the simulator that the caller method has been reentered |
| if (NotifySimulator) { |
| __ get_method(rmethod); |
| __ notify(Assembler::method_reentry); |
| } |
| #endif |
| // Entry point for exceptions thrown within interpreter code |
| Interpreter::_throw_exception_entry = __ pc(); |
| // If we came here via a NullPointerException on the receiver of a |
| // method, rmethod may be corrupt. |
| __ get_method(rmethod); |
| // expression stack is undefined here |
| // r0: exception |
| // rbcp: exception bcp |
| __ verify_oop(r0); |
| __ mov(c_rarg1, r0); |
| |
| // 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_VM(r3, |
| CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::exception_handler_for_exception), |
| c_rarg1); |
| |
| // Calculate stack limit |
| __ ldr(rscratch1, Address(rmethod, Method::const_offset())); |
| __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset())); |
| __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4); |
| __ ldr(rscratch2, |
| Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize)); |
| __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3); |
| __ andr(sp, rscratch1, -16); |
| |
| // r0: exception handler entry point |
| // r3: preserved exception oop |
| // rbcp: bcp for exception handler |
| __ push_ptr(r3); // push exception which is now the only value on the stack |
| __ br(r0); // jump to exception handler (may be _remove_activation_entry!) |
| |
| // 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). |
| |
| // |
| // JVMTI PopFrame support |
| // |
| |
| Interpreter::_remove_activation_preserving_args_entry = __ pc(); |
| __ empty_expression_stack(); |
| // Set the popframe_processing bit in pending_popframe_condition |
| // indicating that we are currently handling popframe, so that |
| // call_VMs that may happen later do not trigger new popframe |
| // handling cycles. |
| __ ldrw(r3, Address(rthread, JavaThread::popframe_condition_offset())); |
| __ orr(r3, r3, JavaThread::popframe_processing_bit); |
| __ strw(r3, Address(rthread, JavaThread::popframe_condition_offset())); |
| |
| { |
| // 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; |
| __ ldr(c_rarg1, Address(rfp, frame::return_addr_offset * wordSize)); |
| __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::interpreter_contains), c_rarg1); |
| __ cbnz(r0, caller_not_deoptimized); |
| |
| // Compute size of arguments for saving when returning to |
| // deoptimized caller |
| __ get_method(r0); |
| __ ldr(r0, Address(r0, Method::const_offset())); |
| __ load_unsigned_short(r0, Address(r0, in_bytes(ConstMethod:: |
| size_of_parameters_offset()))); |
| __ lsl(r0, r0, Interpreter::logStackElementSize); |
| __ restore_locals(); // XXX do we need this? |
| __ sub(rlocals, rlocals, r0); |
| __ add(rlocals, rlocals, wordSize); |
| // Save these arguments |
| __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, |
| Deoptimization:: |
| popframe_preserve_args), |
| rthread, r0, rlocals); |
| |
| __ remove_activation(vtos, |
| /* throw_monitor_exception */ false, |
| /* install_monitor_exception */ false, |
| /* notify_jvmdi */ false); |
| |
| // Inform deoptimization that it is responsible for restoring |
| // these arguments |
| __ mov(rscratch1, JavaThread::popframe_force_deopt_reexecution_bit); |
| __ strw(rscratch1, Address(rthread, JavaThread::popframe_condition_offset())); |
| |
| // Continue in deoptimization handler |
| __ ret(lr); |
| |
| __ bind(caller_not_deoptimized); |
| } |
| |
| __ remove_activation(vtos, |
| /* throw_monitor_exception */ false, |
| /* install_monitor_exception */ false, |
| /* notify_jvmdi */ false); |
| |
| // Restore the last_sp and null it out |
| __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); |
| __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); |
| |
| __ restore_bcp(); |
| __ restore_locals(); |
| __ restore_constant_pool_cache(); |
| __ get_method(rmethod); |
| |
| // 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(); |
| } |
| |
| // Clear the popframe condition flag |
| __ strw(zr, Address(rthread, JavaThread::popframe_condition_offset())); |
| assert(JavaThread::popframe_inactive == 0, "fix popframe_inactive"); |
| |
| #if INCLUDE_JVMTI |
| { |
| Label L_done; |
| |
| __ ldrb(rscratch1, Address(rbcp, 0)); |
| __ cmpw(r1, Bytecodes::_invokestatic); |
| __ br(Assembler::EQ, 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. |
| |
| __ ldr(c_rarg0, Address(rlocals, 0)); |
| __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), c_rarg0, rmethod, rbcp); |
| |
| __ cbz(r0, L_done); |
| |
| __ str(r0, Address(esp, 0)); |
| __ bind(L_done); |
| } |
| #endif // INCLUDE_JVMTI |
| |
| // Restore machine SP |
| __ ldr(rscratch1, Address(rmethod, Method::const_offset())); |
| __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset())); |
| __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4); |
| __ ldr(rscratch2, |
| Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize)); |
| __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3); |
| __ andr(sp, rscratch1, -16); |
| |
| __ dispatch_next(vtos); |
| // end of PopFrame support |
| |
| Interpreter::_remove_activation_entry = __ pc(); |
| |
| // preserve exception over this code sequence |
| __ pop_ptr(r0); |
| __ str(r0, Address(rthread, JavaThread::vm_result_offset())); |
| // remove the activation (without doing throws on illegalMonitorExceptions) |
| __ remove_activation(vtos, false, true, false); |
| // restore exception |
| // restore exception |
| __ get_vm_result(r0, rthread); |
| |
| // In between activations - previous activation type unknown yet |
| // compute continuation point - the continuation point expects the |
| // following registers set up: |
| // |
| // r0: exception |
| // lr: return address/pc that threw exception |
| // rsp: expression stack of caller |
| // rfp: fp of caller |
| // FIXME: There's no point saving LR here because VM calls don't trash it |
| __ stp(r0, lr, Address(__ pre(sp, -2 * wordSize))); // save exception & return address |
| __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, |
| SharedRuntime::exception_handler_for_return_address), |
| rthread, lr); |
| __ mov(r1, r0); // save exception handler |
| __ ldp(r0, lr, Address(__ post(sp, 2 * wordSize))); // restore exception & return address |
| // We might be returning to a deopt handler that expects r3 to |
| // contain the exception pc |
| __ mov(r3, lr); |
| // Note that an "issuing PC" is actually the next PC after the call |
| __ br(r1); // jump to exception |
| // handler of caller |
| } |
| |
| |
| // |
| // JVMTI ForceEarlyReturn support |
| // |
| address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { |
| address entry = __ pc(); |
| |
| __ restore_bcp(); |
| __ restore_locals(); |
| __ empty_expression_stack(); |
| __ load_earlyret_value(state); |
| |
| __ ldr(rscratch1, Address(rthread, JavaThread::jvmti_thread_state_offset())); |
| Address cond_addr(rscratch1, JvmtiThreadState::earlyret_state_offset()); |
| |
| // Clear the earlyret state |
| assert(JvmtiThreadState::earlyret_inactive == 0, "should be"); |
| __ str(zr, cond_addr); |
| |
| __ remove_activation(state, |
| false, /* throw_monitor_exception */ |
| false, /* install_monitor_exception */ |
| true); /* notify_jvmdi */ |
| __ ret(lr); |
| |
| return entry; |
| } // end of 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(); __ b(L); |
| fep = __ pc(); __ push_f(); __ b(L); |
| dep = __ pc(); __ push_d(); __ b(L); |
| lep = __ pc(); __ push_l(); __ b(L); |
| bep = cep = sep = |
| iep = __ pc(); __ push_i(); |
| vep = __ pc(); |
| __ bind(L); |
| generate_and_dispatch(t); |
| } |
| |
| //----------------------------------------------------------------------------- |
| |
| // Non-product code |
| #ifndef PRODUCT |
| address TemplateInterpreterGenerator::generate_trace_code(TosState state) { |
| address entry = __ pc(); |
| |
| __ push(lr); |
| __ push(state); |
| __ push(RegSet::range(r0, r15), sp); |
| __ mov(c_rarg2, r0); // Pass itos |
| __ call_VM(noreg, |
| CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), |
| c_rarg1, c_rarg2, c_rarg3); |
| __ pop(RegSet::range(r0, r15), sp); |
| __ pop(state); |
| __ pop(lr); |
| __ ret(lr); // return from result handler |
| |
| return entry; |
| } |
| |
| void TemplateInterpreterGenerator::count_bytecode() { |
| Register rscratch3 = r0; |
| __ push(rscratch1); |
| __ push(rscratch2); |
| __ push(rscratch3); |
| __ mov(rscratch3, (address) &BytecodeCounter::_counter_value); |
| __ atomic_add(noreg, 1, rscratch3); |
| __ pop(rscratch3); |
| __ pop(rscratch2); |
| __ pop(rscratch1); |
| } |
| |
| void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { ; } |
| |
| void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { ; } |
| |
| |
| 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. |
| |
| assert(Interpreter::trace_code(t->tos_in()) != NULL, |
| "entry must have been generated"); |
| __ bl(Interpreter::trace_code(t->tos_in())); |
| __ reinit_heapbase(); |
| } |
| |
| |
| void TemplateInterpreterGenerator::stop_interpreter_at() { |
| Label L; |
| __ push(rscratch1); |
| __ mov(rscratch1, (address) &BytecodeCounter::_counter_value); |
| __ ldr(rscratch1, Address(rscratch1)); |
| __ mov(rscratch2, StopInterpreterAt); |
| __ cmpw(rscratch1, rscratch2); |
| __ br(Assembler::NE, L); |
| __ brk(0); |
| __ bind(L); |
| __ pop(rscratch1); |
| } |
| |
| #ifdef BUILTIN_SIM |
| |
| #include <sys/mman.h> |
| #include <unistd.h> |
| |
| extern "C" { |
| static int PAGESIZE = getpagesize(); |
| int is_mapped_address(u_int64_t address) |
| { |
| address = (address & ~((u_int64_t)PAGESIZE - 1)); |
| if (msync((void *)address, PAGESIZE, MS_ASYNC) == 0) { |
| return true; |
| } |
| if (errno != ENOMEM) { |
| return true; |
| } |
| return false; |
| } |
| |
| void bccheck1(u_int64_t pc, u_int64_t fp, char *method, int *bcidx, int *framesize, char *decode) |
| { |
| if (method != 0) { |
| method[0] = '\0'; |
| } |
| if (bcidx != 0) { |
| *bcidx = -2; |
| } |
| if (decode != 0) { |
| decode[0] = 0; |
| } |
| |
| if (framesize != 0) { |
| *framesize = -1; |
| } |
| |
| if (Interpreter::contains((address)pc)) { |
| AArch64Simulator *sim = AArch64Simulator::get_current(UseSimulatorCache, DisableBCCheck); |
| Method* meth; |
| address bcp; |
| if (fp) { |
| #define FRAME_SLOT_METHOD 3 |
| #define FRAME_SLOT_BCP 7 |
| meth = (Method*)sim->getMemory()->loadU64(fp - (FRAME_SLOT_METHOD << 3)); |
| bcp = (address)sim->getMemory()->loadU64(fp - (FRAME_SLOT_BCP << 3)); |
| #undef FRAME_SLOT_METHOD |
| #undef FRAME_SLOT_BCP |
| } else { |
| meth = (Method*)sim->getCPUState().xreg(RMETHOD, 0); |
| bcp = (address)sim->getCPUState().xreg(RBCP, 0); |
| } |
| if (meth->is_native()) { |
| return; |
| } |
| if(method && meth->is_method()) { |
| ResourceMark rm; |
| method[0] = 'I'; |
| method[1] = ' '; |
| meth->name_and_sig_as_C_string(method + 2, 398); |
| } |
| if (bcidx) { |
| if (meth->contains(bcp)) { |
| *bcidx = meth->bci_from(bcp); |
| } else { |
| *bcidx = -2; |
| } |
| } |
| if (decode) { |
| if (!BytecodeTracer::closure()) { |
| BytecodeTracer::set_closure(BytecodeTracer::std_closure()); |
| } |
| stringStream str(decode, 400); |
| BytecodeTracer::trace(meth, bcp, &str); |
| } |
| } else { |
| if (method) { |
| CodeBlob *cb = CodeCache::find_blob((address)pc); |
| if (cb != NULL) { |
| if (cb->is_nmethod()) { |
| ResourceMark rm; |
| nmethod* nm = (nmethod*)cb; |
| method[0] = 'C'; |
| method[1] = ' '; |
| nm->method()->name_and_sig_as_C_string(method + 2, 398); |
| } else if (cb->is_adapter_blob()) { |
| strcpy(method, "B adapter blob"); |
| } else if (cb->is_runtime_stub()) { |
| strcpy(method, "B runtime stub"); |
| } else if (cb->is_exception_stub()) { |
| strcpy(method, "B exception stub"); |
| } else if (cb->is_deoptimization_stub()) { |
| strcpy(method, "B deoptimization stub"); |
| } else if (cb->is_safepoint_stub()) { |
| strcpy(method, "B safepoint stub"); |
| } else if (cb->is_uncommon_trap_stub()) { |
| strcpy(method, "B uncommon trap stub"); |
| } else if (cb->contains((address)StubRoutines::call_stub())) { |
| strcpy(method, "B call stub"); |
| } else { |
| strcpy(method, "B unknown blob : "); |
| strcat(method, cb->name()); |
| } |
| if (framesize != NULL) { |
| *framesize = cb->frame_size(); |
| } |
| } |
| } |
| } |
| } |
| |
| |
| JNIEXPORT void bccheck(u_int64_t pc, u_int64_t fp, char *method, int *bcidx, int *framesize, char *decode) |
| { |
| bccheck1(pc, fp, method, bcidx, framesize, decode); |
| } |
| } |
| |
| #endif // BUILTIN_SIM |
| #endif // !PRODUCT |