Mercurial > hg > graal-compiler
view src/share/vm/interpreter/templateInterpreter.cpp @ 3992:d1bdeef3e3e2
7098282: G1: assert(interval >= 0) failed: Sanity check, referencePolicy.cpp: 76
Summary: There is a race between one thread successfully forwarding and copying the klass mirror for the SoftReference class (including the static master clock) and another thread attempting to use the master clock while attempting to discover a soft reference object. Maintain a shadow copy of the soft reference master clock and use the shadow during reference discovery and reference processing.
Reviewed-by: tonyp, brutisso, ysr
author | johnc |
---|---|
date | Wed, 12 Oct 2011 10:25:51 -0700 |
parents | d83ac25d0304 |
children | 6759698e3140 |
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/* * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "interpreter/interpreter.hpp" #include "interpreter/interpreterGenerator.hpp" #include "interpreter/interpreterRuntime.hpp" #include "interpreter/templateTable.hpp" #ifndef CC_INTERP # define __ _masm-> void TemplateInterpreter::initialize() { if (_code != NULL) return; // assertions assert((int)Bytecodes::number_of_codes <= (int)DispatchTable::length, "dispatch table too small"); AbstractInterpreter::initialize(); TemplateTable::initialize(); // generate interpreter { ResourceMark rm; TraceTime timer("Interpreter generation", TraceStartupTime); int code_size = InterpreterCodeSize; NOT_PRODUCT(code_size *= 4;) // debug uses extra interpreter code space _code = new StubQueue(new InterpreterCodeletInterface, code_size, NULL, "Interpreter"); InterpreterGenerator g(_code); if (PrintInterpreter) print(); } // initialize dispatch table _active_table = _normal_table; } //------------------------------------------------------------------------------------------------------------------------ // Implementation of EntryPoint EntryPoint::EntryPoint() { assert(number_of_states == 9, "check the code below"); _entry[btos] = NULL; _entry[ctos] = NULL; _entry[stos] = NULL; _entry[atos] = NULL; _entry[itos] = NULL; _entry[ltos] = NULL; _entry[ftos] = NULL; _entry[dtos] = NULL; _entry[vtos] = NULL; } EntryPoint::EntryPoint(address bentry, address centry, address sentry, address aentry, address ientry, address lentry, address fentry, address dentry, address ventry) { assert(number_of_states == 9, "check the code below"); _entry[btos] = bentry; _entry[ctos] = centry; _entry[stos] = sentry; _entry[atos] = aentry; _entry[itos] = ientry; _entry[ltos] = lentry; _entry[ftos] = fentry; _entry[dtos] = dentry; _entry[vtos] = ventry; } void EntryPoint::set_entry(TosState state, address entry) { assert(0 <= state && state < number_of_states, "state out of bounds"); _entry[state] = entry; } address EntryPoint::entry(TosState state) const { assert(0 <= state && state < number_of_states, "state out of bounds"); return _entry[state]; } void EntryPoint::print() { tty->print("["); for (int i = 0; i < number_of_states; i++) { if (i > 0) tty->print(", "); tty->print(INTPTR_FORMAT, _entry[i]); } tty->print("]"); } bool EntryPoint::operator == (const EntryPoint& y) { int i = number_of_states; while (i-- > 0) { if (_entry[i] != y._entry[i]) return false; } return true; } //------------------------------------------------------------------------------------------------------------------------ // Implementation of DispatchTable EntryPoint DispatchTable::entry(int i) const { assert(0 <= i && i < length, "index out of bounds"); return EntryPoint( _table[btos][i], _table[ctos][i], _table[stos][i], _table[atos][i], _table[itos][i], _table[ltos][i], _table[ftos][i], _table[dtos][i], _table[vtos][i] ); } void DispatchTable::set_entry(int i, EntryPoint& entry) { assert(0 <= i && i < length, "index out of bounds"); assert(number_of_states == 9, "check the code below"); _table[btos][i] = entry.entry(btos); _table[ctos][i] = entry.entry(ctos); _table[stos][i] = entry.entry(stos); _table[atos][i] = entry.entry(atos); _table[itos][i] = entry.entry(itos); _table[ltos][i] = entry.entry(ltos); _table[ftos][i] = entry.entry(ftos); _table[dtos][i] = entry.entry(dtos); _table[vtos][i] = entry.entry(vtos); } bool DispatchTable::operator == (DispatchTable& y) { int i = length; while (i-- > 0) { EntryPoint t = y.entry(i); // for compiler compatibility (BugId 4150096) if (!(entry(i) == t)) return false; } return true; } address TemplateInterpreter::_remove_activation_entry = NULL; address TemplateInterpreter::_remove_activation_preserving_args_entry = NULL; address TemplateInterpreter::_throw_ArrayIndexOutOfBoundsException_entry = NULL; address TemplateInterpreter::_throw_ArrayStoreException_entry = NULL; address TemplateInterpreter::_throw_ArithmeticException_entry = NULL; address TemplateInterpreter::_throw_ClassCastException_entry = NULL; address TemplateInterpreter::_throw_NullPointerException_entry = NULL; address TemplateInterpreter::_throw_StackOverflowError_entry = NULL; address TemplateInterpreter::_throw_exception_entry = NULL; #ifndef PRODUCT EntryPoint TemplateInterpreter::_trace_code; #endif // !PRODUCT EntryPoint TemplateInterpreter::_return_entry[TemplateInterpreter::number_of_return_entries]; EntryPoint TemplateInterpreter::_earlyret_entry; EntryPoint TemplateInterpreter::_deopt_entry [TemplateInterpreter::number_of_deopt_entries ]; EntryPoint TemplateInterpreter::_continuation_entry; EntryPoint TemplateInterpreter::_safept_entry; address TemplateInterpreter::_return_3_addrs_by_index[TemplateInterpreter::number_of_return_addrs]; address TemplateInterpreter::_return_5_addrs_by_index[TemplateInterpreter::number_of_return_addrs]; DispatchTable TemplateInterpreter::_active_table; DispatchTable TemplateInterpreter::_normal_table; DispatchTable TemplateInterpreter::_safept_table; address TemplateInterpreter::_wentry_point[DispatchTable::length]; TemplateInterpreterGenerator::TemplateInterpreterGenerator(StubQueue* _code): AbstractInterpreterGenerator(_code) { _unimplemented_bytecode = NULL; _illegal_bytecode_sequence = NULL; } static const BasicType types[Interpreter::number_of_result_handlers] = { T_BOOLEAN, T_CHAR , T_BYTE , T_SHORT , T_INT , T_LONG , T_VOID , T_FLOAT , T_DOUBLE , T_OBJECT }; void TemplateInterpreterGenerator::generate_all() { AbstractInterpreterGenerator::generate_all(); { CodeletMark cm(_masm, "error exits"); _unimplemented_bytecode = generate_error_exit("unimplemented bytecode"); _illegal_bytecode_sequence = generate_error_exit("illegal bytecode sequence - method not verified"); } #ifndef PRODUCT if (TraceBytecodes) { CodeletMark cm(_masm, "bytecode tracing support"); Interpreter::_trace_code = EntryPoint( generate_trace_code(btos), generate_trace_code(ctos), generate_trace_code(stos), generate_trace_code(atos), generate_trace_code(itos), generate_trace_code(ltos), generate_trace_code(ftos), generate_trace_code(dtos), generate_trace_code(vtos) ); } #endif // !PRODUCT { CodeletMark cm(_masm, "return entry points"); for (int i = 0; i < Interpreter::number_of_return_entries; i++) { Interpreter::_return_entry[i] = EntryPoint( generate_return_entry_for(itos, i), generate_return_entry_for(itos, i), generate_return_entry_for(itos, i), generate_return_entry_for(atos, i), generate_return_entry_for(itos, i), generate_return_entry_for(ltos, i), generate_return_entry_for(ftos, i), generate_return_entry_for(dtos, i), generate_return_entry_for(vtos, i) ); } } { CodeletMark cm(_masm, "earlyret entry points"); Interpreter::_earlyret_entry = EntryPoint( generate_earlyret_entry_for(btos), generate_earlyret_entry_for(ctos), generate_earlyret_entry_for(stos), generate_earlyret_entry_for(atos), generate_earlyret_entry_for(itos), generate_earlyret_entry_for(ltos), generate_earlyret_entry_for(ftos), generate_earlyret_entry_for(dtos), generate_earlyret_entry_for(vtos) ); } { CodeletMark cm(_masm, "deoptimization entry points"); for (int i = 0; i < Interpreter::number_of_deopt_entries; i++) { Interpreter::_deopt_entry[i] = EntryPoint( generate_deopt_entry_for(itos, i), generate_deopt_entry_for(itos, i), generate_deopt_entry_for(itos, i), generate_deopt_entry_for(atos, i), generate_deopt_entry_for(itos, i), generate_deopt_entry_for(ltos, i), generate_deopt_entry_for(ftos, i), generate_deopt_entry_for(dtos, i), generate_deopt_entry_for(vtos, i) ); } } { CodeletMark cm(_masm, "result handlers for native calls"); // The various result converter stublets. int is_generated[Interpreter::number_of_result_handlers]; memset(is_generated, 0, sizeof(is_generated)); for (int i = 0; i < Interpreter::number_of_result_handlers; i++) { BasicType type = types[i]; if (!is_generated[Interpreter::BasicType_as_index(type)]++) { Interpreter::_native_abi_to_tosca[Interpreter::BasicType_as_index(type)] = generate_result_handler_for(type); } } } for (int j = 0; j < number_of_states; j++) { const TosState states[] = {btos, ctos, stos, itos, ltos, ftos, dtos, atos, vtos}; int index = Interpreter::TosState_as_index(states[j]); Interpreter::_return_3_addrs_by_index[index] = Interpreter::return_entry(states[j], 3); Interpreter::_return_5_addrs_by_index[index] = Interpreter::return_entry(states[j], 5); } { CodeletMark cm(_masm, "continuation entry points"); Interpreter::_continuation_entry = EntryPoint( generate_continuation_for(btos), generate_continuation_for(ctos), generate_continuation_for(stos), generate_continuation_for(atos), generate_continuation_for(itos), generate_continuation_for(ltos), generate_continuation_for(ftos), generate_continuation_for(dtos), generate_continuation_for(vtos) ); } { CodeletMark cm(_masm, "safepoint entry points"); Interpreter::_safept_entry = EntryPoint( generate_safept_entry_for(btos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), generate_safept_entry_for(ctos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), generate_safept_entry_for(stos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), generate_safept_entry_for(atos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), generate_safept_entry_for(itos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), generate_safept_entry_for(ltos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), generate_safept_entry_for(ftos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), generate_safept_entry_for(dtos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), generate_safept_entry_for(vtos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)) ); } { CodeletMark cm(_masm, "exception handling"); // (Note: this is not safepoint safe because thread may return to compiled code) generate_throw_exception(); } { CodeletMark cm(_masm, "throw exception entrypoints"); Interpreter::_throw_ArrayIndexOutOfBoundsException_entry = generate_ArrayIndexOutOfBounds_handler("java/lang/ArrayIndexOutOfBoundsException"); Interpreter::_throw_ArrayStoreException_entry = generate_klass_exception_handler("java/lang/ArrayStoreException" ); Interpreter::_throw_ArithmeticException_entry = generate_exception_handler("java/lang/ArithmeticException" , "/ by zero"); Interpreter::_throw_ClassCastException_entry = generate_ClassCastException_handler(); Interpreter::_throw_NullPointerException_entry = generate_exception_handler("java/lang/NullPointerException" , NULL ); Interpreter::_throw_StackOverflowError_entry = generate_StackOverflowError_handler(); } #define method_entry(kind) \ { CodeletMark cm(_masm, "method entry point (kind = " #kind ")"); \ Interpreter::_entry_table[Interpreter::kind] = generate_method_entry(Interpreter::kind); \ } // all non-native method kinds method_entry(zerolocals) method_entry(zerolocals_synchronized) method_entry(empty) method_entry(accessor) method_entry(abstract) method_entry(method_handle) method_entry(java_lang_math_sin ) method_entry(java_lang_math_cos ) method_entry(java_lang_math_tan ) method_entry(java_lang_math_abs ) method_entry(java_lang_math_sqrt ) method_entry(java_lang_math_log ) method_entry(java_lang_math_log10) method_entry(java_lang_ref_reference_get) // all native method kinds (must be one contiguous block) Interpreter::_native_entry_begin = Interpreter::code()->code_end(); method_entry(native) method_entry(native_synchronized) Interpreter::_native_entry_end = Interpreter::code()->code_end(); #undef method_entry // Bytecodes set_entry_points_for_all_bytes(); set_safepoints_for_all_bytes(); } //------------------------------------------------------------------------------------------------------------------------ address TemplateInterpreterGenerator::generate_error_exit(const char* msg) { address entry = __ pc(); __ stop(msg); return entry; } //------------------------------------------------------------------------------------------------------------------------ void TemplateInterpreterGenerator::set_entry_points_for_all_bytes() { for (int i = 0; i < DispatchTable::length; i++) { Bytecodes::Code code = (Bytecodes::Code)i; if (Bytecodes::is_defined(code)) { set_entry_points(code); } else { set_unimplemented(i); } } } void TemplateInterpreterGenerator::set_safepoints_for_all_bytes() { for (int i = 0; i < DispatchTable::length; i++) { Bytecodes::Code code = (Bytecodes::Code)i; if (Bytecodes::is_defined(code)) Interpreter::_safept_table.set_entry(code, Interpreter::_safept_entry); } } void TemplateInterpreterGenerator::set_unimplemented(int i) { address e = _unimplemented_bytecode; EntryPoint entry(e, e, e, e, e, e, e, e, e); Interpreter::_normal_table.set_entry(i, entry); Interpreter::_wentry_point[i] = _unimplemented_bytecode; } void TemplateInterpreterGenerator::set_entry_points(Bytecodes::Code code) { CodeletMark cm(_masm, Bytecodes::name(code), code); // initialize entry points assert(_unimplemented_bytecode != NULL, "should have been generated before"); assert(_illegal_bytecode_sequence != NULL, "should have been generated before"); address bep = _illegal_bytecode_sequence; address cep = _illegal_bytecode_sequence; address sep = _illegal_bytecode_sequence; address aep = _illegal_bytecode_sequence; address iep = _illegal_bytecode_sequence; address lep = _illegal_bytecode_sequence; address fep = _illegal_bytecode_sequence; address dep = _illegal_bytecode_sequence; address vep = _unimplemented_bytecode; address wep = _unimplemented_bytecode; // code for short & wide version of bytecode if (Bytecodes::is_defined(code)) { Template* t = TemplateTable::template_for(code); assert(t->is_valid(), "just checking"); set_short_entry_points(t, bep, cep, sep, aep, iep, lep, fep, dep, vep); } if (Bytecodes::wide_is_defined(code)) { Template* t = TemplateTable::template_for_wide(code); assert(t->is_valid(), "just checking"); set_wide_entry_point(t, wep); } // set entry points EntryPoint entry(bep, cep, sep, aep, iep, lep, fep, dep, vep); Interpreter::_normal_table.set_entry(code, entry); Interpreter::_wentry_point[code] = wep; } void TemplateInterpreterGenerator::set_wide_entry_point(Template* t, address& wep) { assert(t->is_valid(), "template must exist"); assert(t->tos_in() == vtos, "only vtos tos_in supported for wide instructions"); wep = __ pc(); generate_and_dispatch(t); } void TemplateInterpreterGenerator::set_short_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(), "template must exist"); switch (t->tos_in()) { case btos: case ctos: case stos: ShouldNotReachHere(); // btos/ctos/stos should use itos. break; case atos: vep = __ pc(); __ pop(atos); aep = __ pc(); generate_and_dispatch(t); break; case itos: vep = __ pc(); __ pop(itos); iep = __ pc(); generate_and_dispatch(t); break; case ltos: vep = __ pc(); __ pop(ltos); lep = __ pc(); generate_and_dispatch(t); break; case ftos: vep = __ pc(); __ pop(ftos); fep = __ pc(); generate_and_dispatch(t); break; case dtos: vep = __ pc(); __ pop(dtos); dep = __ pc(); generate_and_dispatch(t); break; case vtos: set_vtos_entry_points(t, bep, cep, sep, aep, iep, lep, fep, dep, vep); break; default : ShouldNotReachHere(); break; } } //------------------------------------------------------------------------------------------------------------------------ void TemplateInterpreterGenerator::generate_and_dispatch(Template* t, TosState tos_out) { if (PrintBytecodeHistogram) histogram_bytecode(t); #ifndef PRODUCT // debugging code if (CountBytecodes || TraceBytecodes || StopInterpreterAt > 0) count_bytecode(); if (PrintBytecodePairHistogram) histogram_bytecode_pair(t); if (TraceBytecodes) trace_bytecode(t); if (StopInterpreterAt > 0) stop_interpreter_at(); __ verify_FPU(1, t->tos_in()); #endif // !PRODUCT int step; if (!t->does_dispatch()) { step = t->is_wide() ? Bytecodes::wide_length_for(t->bytecode()) : Bytecodes::length_for(t->bytecode()); if (tos_out == ilgl) tos_out = t->tos_out(); // compute bytecode size assert(step > 0, "just checkin'"); // setup stuff for dispatching next bytecode if (ProfileInterpreter && VerifyDataPointer && methodDataOopDesc::bytecode_has_profile(t->bytecode())) { __ verify_method_data_pointer(); } __ dispatch_prolog(tos_out, step); } // generate template t->generate(_masm); // advance if (t->does_dispatch()) { #ifdef ASSERT // make sure execution doesn't go beyond this point if code is broken __ should_not_reach_here(); #endif // ASSERT } else { // dispatch to next bytecode __ dispatch_epilog(tos_out, step); } } //------------------------------------------------------------------------------------------------------------------------ // Entry points address TemplateInterpreter::return_entry(TosState state, int length) { guarantee(0 <= length && length < Interpreter::number_of_return_entries, "illegal length"); return _return_entry[length].entry(state); } address TemplateInterpreter::deopt_entry(TosState state, int length) { guarantee(0 <= length && length < Interpreter::number_of_deopt_entries, "illegal length"); return _deopt_entry[length].entry(state); } //------------------------------------------------------------------------------------------------------------------------ // Suport for invokes int TemplateInterpreter::TosState_as_index(TosState state) { assert( state < number_of_states , "Invalid state in TosState_as_index"); assert(0 <= (int)state && (int)state < TemplateInterpreter::number_of_return_addrs, "index out of bounds"); return (int)state; } //------------------------------------------------------------------------------------------------------------------------ // Safepoint suppport static inline void copy_table(address* from, address* to, int size) { // Copy non-overlapping tables. The copy has to occur word wise for MT safety. while (size-- > 0) *to++ = *from++; } void TemplateInterpreter::notice_safepoints() { if (!_notice_safepoints) { // switch to safepoint dispatch table _notice_safepoints = true; copy_table((address*)&_safept_table, (address*)&_active_table, sizeof(_active_table) / sizeof(address)); } } // switch from the dispatch table which notices safepoints back to the // normal dispatch table. So that we can notice single stepping points, // keep the safepoint dispatch table if we are single stepping in JVMTI. // Note that the should_post_single_step test is exactly as fast as the // JvmtiExport::_enabled test and covers both cases. void TemplateInterpreter::ignore_safepoints() { if (_notice_safepoints) { if (!JvmtiExport::should_post_single_step()) { // switch to normal dispatch table _notice_safepoints = false; copy_table((address*)&_normal_table, (address*)&_active_table, sizeof(_active_table) / sizeof(address)); } } } //------------------------------------------------------------------------------------------------------------------------ // Deoptimization support // If deoptimization happens, this function returns the point of next bytecode to continue execution address TemplateInterpreter::deopt_continue_after_entry(methodOop method, address bcp, int callee_parameters, bool is_top_frame) { return AbstractInterpreter::deopt_continue_after_entry(method, bcp, callee_parameters, is_top_frame); } // If deoptimization happens, this function returns the point where the interpreter reexecutes // the bytecode. // Note: Bytecodes::_athrow (C1 only) and Bytecodes::_return are the special cases // that do not return "Interpreter::deopt_entry(vtos, 0)" address TemplateInterpreter::deopt_reexecute_entry(methodOop method, address bcp) { assert(method->contains(bcp), "just checkin'"); Bytecodes::Code code = Bytecodes::java_code_at(method, bcp); if (code == Bytecodes::_return) { // This is used for deopt during registration of finalizers // during Object.<init>. We simply need to resume execution at // the standard return vtos bytecode to pop the frame normally. // reexecuting the real bytecode would cause double registration // of the finalizable object. return _normal_table.entry(Bytecodes::_return).entry(vtos); } else { return AbstractInterpreter::deopt_reexecute_entry(method, bcp); } } // If deoptimization happens, the interpreter should reexecute this bytecode. // This function mainly helps the compilers to set up the reexecute bit. bool TemplateInterpreter::bytecode_should_reexecute(Bytecodes::Code code) { if (code == Bytecodes::_return) { //Yes, we consider Bytecodes::_return as a special case of reexecution return true; } else { return AbstractInterpreter::bytecode_should_reexecute(code); } } #endif // !CC_INTERP