| /* |
| * Copyright 1997-2007 Sun Microsystems, 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| #include "incls/_precompiled.incl" |
| #include "incls/_bytecodeTracer.cpp.incl" |
| |
| |
| #ifndef PRODUCT |
| |
| // Standard closure for BytecodeTracer: prints the current bytecode |
| // and its attributes using bytecode-specific information. |
| |
| class BytecodePrinter: public BytecodeClosure { |
| private: |
| // %%% This field is not GC-ed, and so can contain garbage |
| // between critical sections. Use only pointer-comparison |
| // operations on the pointer, except within a critical section. |
| // (Also, ensure that occasional false positives are benign.) |
| methodOop _current_method; |
| bool _is_wide; |
| address _next_pc; // current decoding position |
| |
| void align() { _next_pc = (address)round_to((intptr_t)_next_pc, sizeof(jint)); } |
| int get_byte() { return *(jbyte*) _next_pc++; } // signed |
| short get_short() { short i=Bytes::get_Java_u2(_next_pc); _next_pc+=2; return i; } |
| int get_int() { int i=Bytes::get_Java_u4(_next_pc); _next_pc+=4; return i; } |
| |
| int get_index() { return *(address)_next_pc++; } |
| int get_big_index() { int i=Bytes::get_Java_u2(_next_pc); _next_pc+=2; return i; } |
| int get_index_special() { return (is_wide()) ? get_big_index() : get_index(); } |
| methodOop method() { return _current_method; } |
| bool is_wide() { return _is_wide; } |
| |
| |
| void print_constant(int i, outputStream* st = tty); |
| void print_attributes(Bytecodes::Code code, int bci, outputStream* st = tty); |
| void bytecode_epilog(int bci, outputStream* st = tty); |
| |
| public: |
| BytecodePrinter() { |
| _is_wide = false; |
| } |
| |
| // This method is called while executing the raw bytecodes, so none of |
| // the adjustments that BytecodeStream performs applies. |
| void trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) { |
| ResourceMark rm; |
| if (_current_method != method()) { |
| // Note 1: This code will not work as expected with true MT/MP. |
| // Need an explicit lock or a different solution. |
| // It is possible for this block to be skipped, if a garbage |
| // _current_method pointer happens to have the same bits as |
| // the incoming method. We could lose a line of trace output. |
| // This is acceptable in a debug-only feature. |
| st->cr(); |
| st->print("[%d] ", (int) Thread::current()->osthread()->thread_id()); |
| method->print_name(st); |
| st->cr(); |
| _current_method = method(); |
| } |
| Bytecodes::Code code; |
| if (is_wide()) { |
| // bcp wasn't advanced if previous bytecode was _wide. |
| code = Bytecodes::code_at(bcp+1); |
| } else { |
| code = Bytecodes::code_at(bcp); |
| } |
| int bci = bcp - method->code_base(); |
| st->print("[%d] ", (int) Thread::current()->osthread()->thread_id()); |
| if (Verbose) { |
| st->print("%8d %4d " INTPTR_FORMAT " " INTPTR_FORMAT " %s", |
| BytecodeCounter::counter_value(), bci, tos, tos2, Bytecodes::name(code)); |
| } else { |
| st->print("%8d %4d %s", |
| BytecodeCounter::counter_value(), bci, Bytecodes::name(code)); |
| } |
| _next_pc = is_wide() ? bcp+2 : bcp+1; |
| print_attributes(code, bci); |
| // Set is_wide for the next one, since the caller of this doesn't skip |
| // the next bytecode. |
| _is_wide = (code == Bytecodes::_wide); |
| } |
| |
| // Used for methodOop::print_codes(). The input bcp comes from |
| // BytecodeStream, which will skip wide bytecodes. |
| void trace(methodHandle method, address bcp, outputStream* st) { |
| _current_method = method(); |
| ResourceMark rm; |
| Bytecodes::Code code = Bytecodes::code_at(bcp); |
| // Set is_wide |
| _is_wide = (code == Bytecodes::_wide); |
| if (is_wide()) { |
| code = Bytecodes::code_at(bcp+1); |
| } |
| int bci = bcp - method->code_base(); |
| // Print bytecode index and name |
| if (is_wide()) { |
| st->print("%d %s_w", bci, Bytecodes::name(code)); |
| } else { |
| st->print("%d %s", bci, Bytecodes::name(code)); |
| } |
| _next_pc = is_wide() ? bcp+2 : bcp+1; |
| print_attributes(code, bci, st); |
| bytecode_epilog(bci, st); |
| } |
| }; |
| |
| |
| // Implementation of BytecodeTracer |
| |
| // %%% This set_closure thing seems overly general, given that |
| // nobody uses it. Also, if BytecodePrinter weren't hidden |
| // then methodOop could use instances of it directly and it |
| // would be easier to remove races on _current_method and bcp. |
| // Since this is not product functionality, we can defer cleanup. |
| |
| BytecodeClosure* BytecodeTracer::_closure = NULL; |
| |
| static BytecodePrinter std_closure; |
| BytecodeClosure* BytecodeTracer::std_closure() { |
| return &::std_closure; |
| } |
| |
| |
| void BytecodeTracer::trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) { |
| if (TraceBytecodes && BytecodeCounter::counter_value() >= TraceBytecodesAt) { |
| ttyLocker ttyl; // 5065316: keep the following output coherent |
| // The ttyLocker also prevents races between two threads |
| // trying to use the single instance of BytecodePrinter. |
| // Using the ttyLocker prevents the system from coming to |
| // a safepoint within this code, which is sensitive to methodOop |
| // movement. |
| // |
| // There used to be a leaf mutex here, but the ttyLocker will |
| // work just as well, as long as the printing operations never block. |
| // |
| // We put the locker on the static trace method, not the |
| // virtual one, because the clients of this module go through |
| // the static method. |
| _closure->trace(method, bcp, tos, tos2, st); |
| } |
| } |
| |
| void BytecodeTracer::trace(methodHandle method, address bcp, outputStream* st) { |
| ttyLocker ttyl; // 5065316: keep the following output coherent |
| _closure->trace(method, bcp, st); |
| } |
| |
| void print_oop(oop value, outputStream* st) { |
| if (value == NULL) { |
| st->print_cr(" NULL"); |
| } else { |
| EXCEPTION_MARK; |
| Handle h_value (THREAD, value); |
| symbolHandle sym = java_lang_String::as_symbol(h_value, CATCH); |
| if (sym->utf8_length() > 32) { |
| st->print_cr(" ...."); |
| } else { |
| sym->print_on(st); st->cr(); |
| } |
| } |
| } |
| |
| void BytecodePrinter::print_constant(int i, outputStream* st) { |
| constantPoolOop constants = method()->constants(); |
| constantTag tag = constants->tag_at(i); |
| |
| if (tag.is_int()) { |
| st->print_cr(" " INT32_FORMAT, constants->int_at(i)); |
| } else if (tag.is_long()) { |
| st->print_cr(" " INT64_FORMAT, constants->long_at(i)); |
| } else if (tag.is_float()) { |
| st->print_cr(" %f", constants->float_at(i)); |
| } else if (tag.is_double()) { |
| st->print_cr(" %f", constants->double_at(i)); |
| } else if (tag.is_string()) { |
| oop string = constants->resolved_string_at(i); |
| print_oop(string, st); |
| } else if (tag.is_unresolved_string()) { |
| st->print_cr(" <unresolved string at %d>", i); |
| } else if (tag.is_klass()) { |
| st->print_cr(" %s", constants->resolved_klass_at(i)->klass_part()->external_name()); |
| } else if (tag.is_unresolved_klass()) { |
| st->print_cr(" <unresolved klass at %d>", i); |
| } else ShouldNotReachHere(); |
| } |
| |
| |
| void BytecodePrinter::print_attributes(Bytecodes::Code code, int bci, outputStream* st) { |
| // Show attributes of pre-rewritten codes |
| code = Bytecodes::java_code(code); |
| // If the code doesn't have any fields there's nothing to print. |
| // note this is ==1 because the tableswitch and lookupswitch are |
| // zero size (for some reason) and we want to print stuff out for them. |
| if (Bytecodes::length_for(code) == 1) { |
| st->cr(); |
| return; |
| } |
| |
| switch(code) { |
| // Java specific bytecodes only matter. |
| case Bytecodes::_bipush: |
| st->print_cr(" " INT32_FORMAT, get_byte()); |
| break; |
| case Bytecodes::_sipush: |
| st->print_cr(" " INT32_FORMAT, get_short()); |
| break; |
| case Bytecodes::_ldc: |
| print_constant(get_index(), st); |
| break; |
| |
| case Bytecodes::_ldc_w: |
| case Bytecodes::_ldc2_w: |
| print_constant(get_big_index(), st); |
| break; |
| |
| case Bytecodes::_iload: |
| case Bytecodes::_lload: |
| case Bytecodes::_fload: |
| case Bytecodes::_dload: |
| case Bytecodes::_aload: |
| case Bytecodes::_istore: |
| case Bytecodes::_lstore: |
| case Bytecodes::_fstore: |
| case Bytecodes::_dstore: |
| case Bytecodes::_astore: |
| st->print_cr(" #%d", get_index_special()); |
| break; |
| |
| case Bytecodes::_iinc: |
| { int index = get_index_special(); |
| jint offset = is_wide() ? get_short(): get_byte(); |
| st->print_cr(" #%d " INT32_FORMAT, index, offset); |
| } |
| break; |
| |
| case Bytecodes::_newarray: { |
| BasicType atype = (BasicType)get_index(); |
| const char* str = type2name(atype); |
| if (str == NULL || atype == T_OBJECT || atype == T_ARRAY) { |
| assert(false, "Unidentified basic type"); |
| } |
| st->print_cr(" %s", str); |
| } |
| break; |
| case Bytecodes::_anewarray: { |
| int klass_index = get_big_index(); |
| constantPoolOop constants = method()->constants(); |
| symbolOop name = constants->klass_name_at(klass_index); |
| st->print_cr(" %s ", name->as_C_string()); |
| } |
| break; |
| case Bytecodes::_multianewarray: { |
| int klass_index = get_big_index(); |
| int nof_dims = get_index(); |
| constantPoolOop constants = method()->constants(); |
| symbolOop name = constants->klass_name_at(klass_index); |
| st->print_cr(" %s %d", name->as_C_string(), nof_dims); |
| } |
| break; |
| |
| case Bytecodes::_ifeq: |
| case Bytecodes::_ifnull: |
| case Bytecodes::_iflt: |
| case Bytecodes::_ifle: |
| case Bytecodes::_ifne: |
| case Bytecodes::_ifnonnull: |
| case Bytecodes::_ifgt: |
| case Bytecodes::_ifge: |
| case Bytecodes::_if_icmpeq: |
| case Bytecodes::_if_icmpne: |
| case Bytecodes::_if_icmplt: |
| case Bytecodes::_if_icmpgt: |
| case Bytecodes::_if_icmple: |
| case Bytecodes::_if_icmpge: |
| case Bytecodes::_if_acmpeq: |
| case Bytecodes::_if_acmpne: |
| case Bytecodes::_goto: |
| case Bytecodes::_jsr: |
| st->print_cr(" %d", bci + get_short()); |
| break; |
| |
| case Bytecodes::_goto_w: |
| case Bytecodes::_jsr_w: |
| st->print_cr(" %d", bci + get_int()); |
| break; |
| |
| case Bytecodes::_ret: st->print_cr(" %d", get_index_special()); break; |
| |
| case Bytecodes::_tableswitch: |
| { align(); |
| int default_dest = bci + get_int(); |
| int lo = get_int(); |
| int hi = get_int(); |
| int len = hi - lo + 1; |
| jint* dest = NEW_RESOURCE_ARRAY(jint, len); |
| for (int i = 0; i < len; i++) { |
| dest[i] = bci + get_int(); |
| } |
| st->print(" %d " INT32_FORMAT " " INT32_FORMAT " ", |
| default_dest, lo, hi); |
| int first = true; |
| for (int ll = lo; ll <= hi; ll++, first = false) { |
| int idx = ll - lo; |
| const char *format = first ? " %d:" INT32_FORMAT " (delta: %d)" : |
| ", %d:" INT32_FORMAT " (delta: %d)"; |
| st->print(format, ll, dest[idx], dest[idx]-bci); |
| } |
| st->cr(); |
| } |
| break; |
| case Bytecodes::_lookupswitch: |
| { align(); |
| int default_dest = bci + get_int(); |
| int len = get_int(); |
| jint* key = NEW_RESOURCE_ARRAY(jint, len); |
| jint* dest = NEW_RESOURCE_ARRAY(jint, len); |
| for (int i = 0; i < len; i++) { |
| key [i] = get_int(); |
| dest[i] = bci + get_int(); |
| }; |
| st->print(" %d %d ", default_dest, len); |
| bool first = true; |
| for (int ll = 0; ll < len; ll++, first = false) { |
| const char *format = first ? " " INT32_FORMAT ":" INT32_FORMAT : |
| ", " INT32_FORMAT ":" INT32_FORMAT ; |
| st->print(format, key[ll], dest[ll]); |
| } |
| st->cr(); |
| } |
| break; |
| |
| case Bytecodes::_putstatic: |
| case Bytecodes::_getstatic: |
| case Bytecodes::_putfield: |
| case Bytecodes::_getfield: { |
| int i = get_big_index(); |
| constantPoolOop constants = method()->constants(); |
| symbolOop field = constants->name_ref_at(i); |
| st->print_cr(" %d <%s>", i, field->as_C_string()); |
| } |
| break; |
| |
| case Bytecodes::_invokevirtual: |
| case Bytecodes::_invokespecial: |
| case Bytecodes::_invokestatic: |
| { int i = get_big_index(); |
| constantPoolOop constants = method()->constants(); |
| symbolOop name = constants->name_ref_at(i); |
| symbolOop signature = constants->signature_ref_at(i); |
| st->print_cr(" %d <%s> <%s> ", i, name->as_C_string(), signature->as_C_string()); |
| } |
| break; |
| |
| case Bytecodes::_invokeinterface: |
| { int i = get_big_index(); |
| int n = get_index(); |
| get_index(); |
| constantPoolOop constants = method()->constants(); |
| symbolOop name = constants->name_ref_at(i); |
| symbolOop signature = constants->signature_ref_at(i); |
| st->print_cr(" %d <%s> <%s> %d", i, name->as_C_string(), signature->as_C_string(), n); |
| } |
| break; |
| |
| case Bytecodes::_new: |
| case Bytecodes::_checkcast: |
| case Bytecodes::_instanceof: |
| { int i = get_big_index(); |
| constantPoolOop constants = method()->constants(); |
| symbolOop name = constants->klass_name_at(i); |
| st->print_cr(" %d <%s>", i, name->as_C_string()); |
| } |
| break; |
| |
| case Bytecodes::_wide: |
| // length is zero not one, but printed with no more info. |
| break; |
| |
| default: |
| ShouldNotReachHere(); |
| break; |
| } |
| } |
| |
| |
| void BytecodePrinter::bytecode_epilog(int bci, outputStream* st) { |
| methodDataOop mdo = method()->method_data(); |
| if (mdo != NULL) { |
| ProfileData* data = mdo->bci_to_data(bci); |
| if (data != NULL) { |
| st->print(" %d", mdo->dp_to_di(data->dp())); |
| st->fill_to(6); |
| data->print_data_on(st); |
| } |
| } |
| } |
| #endif // PRODUCT |