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620 lines
23 KiB
C++
620 lines
23 KiB
C++
/*
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* Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "classfile/classPrinter.hpp"
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#include "classfile/javaClasses.inline.hpp"
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#include "interpreter/bytecodeHistogram.hpp"
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#include "interpreter/bytecodes.hpp"
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#include "interpreter/bytecodeStream.hpp"
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#include "interpreter/bytecodeTracer.hpp"
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#include "interpreter/interpreter.hpp"
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#include "memory/resourceArea.hpp"
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#include "oops/constantPool.inline.hpp"
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#include "oops/method.hpp"
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#include "oops/methodData.hpp"
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#include "runtime/atomicAccess.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "runtime/osThread.hpp"
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#include "utilities/align.hpp"
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// Prints the current bytecode and its attributes using bytecode-specific information.
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class BytecodePrinter {
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private:
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// %%% This field is not GC-ed, and so can contain garbage
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// between critical sections. Use only pointer-comparison
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// operations on the pointer, except within a critical section.
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// (Also, ensure that occasional false positives are benign.)
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Method* _current_method;
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bool _is_wide;
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Bytecodes::Code _code;
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address _next_pc; // current decoding position
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int _flags;
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bool _use_cp_cache;
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bool use_cp_cache() const { return _use_cp_cache; }
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void align() { _next_pc = align_up(_next_pc, sizeof(jint)); }
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int get_byte() { return *(jbyte*) _next_pc++; } // signed
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int get_index_u1() { return *(address)_next_pc++; } // returns 0x00 - 0xff as an int
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short get_short() { short i = Bytes::get_Java_u2 (_next_pc); _next_pc += 2; return i; }
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int get_int() { int i = Bytes::get_Java_u4 (_next_pc); _next_pc += 4; return i; }
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int get_native_index_u2() { int i = Bytes::get_native_u2(_next_pc); _next_pc += 2; return i; }
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int get_native_index_u4() { int i = Bytes::get_native_u4(_next_pc); _next_pc += 4; return i; }
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int get_Java_index_u2() { int i = Bytes::get_Java_u2 (_next_pc); _next_pc += 2; return i; }
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int get_Java_index_u4() { int i = Bytes::get_Java_u4 (_next_pc); _next_pc += 4; return i; }
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int get_index_special() { return (is_wide()) ? get_Java_index_u2() : get_index_u1(); }
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Method* method() const { return _current_method; }
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bool is_wide() const { return _is_wide; }
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Bytecodes::Code raw_code() const { return Bytecodes::Code(_code); }
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ConstantPool* constants() const { return method()->constants(); }
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ConstantPoolCache* cpcache() const { assert(use_cp_cache(), "must be"); return constants()->cache(); }
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void print_constant(int i, outputStream* st);
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void print_cpcache_entry(int cpc_index, outputStream* st);
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void print_invokedynamic(int indy_index, int cp_index, outputStream* st);
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void print_bsm(int cp_index, outputStream* st);
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void print_field_or_method(int cp_index, outputStream* st);
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void print_dynamic(int cp_index, outputStream* st);
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void print_attributes(int bci, outputStream* st);
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void print_method_data_at(int bci, outputStream* st);
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public:
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BytecodePrinter(int flags = 0) : _is_wide(false), _code(Bytecodes::_illegal), _flags(flags) {}
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#ifndef PRODUCT
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BytecodePrinter(Method* prev_method) : BytecodePrinter(0) {
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_current_method = prev_method;
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}
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// This method is called while executing the raw bytecodes, so none of
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// the adjustments that BytecodeStream performs applies.
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void trace(const methodHandle& method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) {
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ResourceMark rm;
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bool method_changed = _current_method != method();
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_current_method = method();
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_use_cp_cache = method->constants()->cache() != nullptr;
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assert(method->method_holder()->is_linked(),
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"this function must be called on methods that are already executing");
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if (method_changed) {
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// Note 1: This code will not work as expected with true MT/MP.
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// Need an explicit lock or a different solution.
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// It is possible for this block to be skipped, if a garbage
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// _current_method pointer happens to have the same bits as
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// the incoming method. We could lose a line of trace output.
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// This is acceptable in a debug-only feature.
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st->cr();
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st->print("[%zu] ", Thread::current()->osthread()->thread_id_for_printing());
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method->print_name(st);
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st->cr();
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}
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Bytecodes::Code code;
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if (is_wide()) {
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// bcp wasn't advanced if previous bytecode was _wide.
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code = Bytecodes::code_at(method(), bcp+1);
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} else {
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code = Bytecodes::code_at(method(), bcp);
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}
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_code = code;
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_next_pc = is_wide() ? bcp+2 : bcp+1;
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// Trace each bytecode unless we're truncating the tracing output, then only print the first
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// bytecode in every method as well as returns/throws that pop control flow
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if (!TraceBytecodesTruncated || method_changed ||
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code == Bytecodes::_athrow ||
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code == Bytecodes::_return_register_finalizer ||
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(code >= Bytecodes::_ireturn && code <= Bytecodes::_return)) {
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int bci = (int)(bcp - method->code_base());
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st->print("[%zu] ", Thread::current()->osthread()->thread_id_for_printing());
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if (Verbose) {
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st->print("%8zu %4d " INTPTR_FORMAT " " INTPTR_FORMAT " %s",
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BytecodeCounter::counter_value(), bci, tos, tos2, Bytecodes::name(code));
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} else {
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st->print("%8zu %4d %s",
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BytecodeCounter::counter_value(), bci, Bytecodes::name(code));
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}
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print_attributes(bci, st);
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}
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// Set is_wide for the next one, since the caller of this doesn't skip
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// the next bytecode.
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_is_wide = (code == Bytecodes::_wide);
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_code = Bytecodes::_illegal;
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if (TraceBytecodesStopAt != 0 && BytecodeCounter::counter_value() >= TraceBytecodesStopAt) {
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TraceBytecodes = false;
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}
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}
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#endif
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// Used for Method::print_codes(). The input bcp comes from
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// BytecodeStream, which will skip wide bytecodes.
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void trace(const methodHandle& method, address bcp, outputStream* st) {
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_current_method = method();
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// This may be called during linking after bytecodes are rewritten to point to the cpCache.
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_use_cp_cache = method->constants()->cache() != nullptr;
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ResourceMark rm;
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Bytecodes::Code code = Bytecodes::code_at(method(), bcp);
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// Set is_wide
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_is_wide = (code == Bytecodes::_wide);
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if (is_wide()) {
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code = Bytecodes::code_at(method(), bcp+1);
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}
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_code = code;
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int bci = (int)(bcp - method->code_base());
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// Print bytecode index and name
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if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_BYTECODE_ADDR)) {
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st->print(INTPTR_FORMAT " ", p2i(bcp));
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}
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if (is_wide()) {
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st->print("%4d %s_w", bci, Bytecodes::name(code));
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} else {
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st->print("%4d %s", bci, Bytecodes::name(code));
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}
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_next_pc = is_wide() ? bcp+2 : bcp+1;
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print_attributes(bci, st);
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if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_METHOD_DATA)) {
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print_method_data_at(bci, st);
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}
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}
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};
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#ifndef PRODUCT
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// We need a global instance to keep track of the method being printed so we can report that
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// the method has changed. If this method is redefined and removed, that's ok because the method passed
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// in won't match, and this will print the method passed in again. Racing threads changing this global
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// will result in reprinting the method passed in again.
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static Method* _method_currently_being_printed = nullptr;
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void BytecodeTracer::trace_interpreter(const methodHandle& method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) {
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if (TraceBytecodes && BytecodeCounter::counter_value() >= TraceBytecodesAt) {
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BytecodePrinter printer(AtomicAccess::load_acquire(&_method_currently_being_printed));
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stringStream buf;
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printer.trace(method, bcp, tos, tos2, &buf);
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st->print("%s", buf.freeze());
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// Save method currently being printed to detect when method printing changes.
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AtomicAccess::release_store(&_method_currently_being_printed, method());
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}
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}
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#endif
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void BytecodeTracer::print_method_codes(const methodHandle& method, int from, int to, outputStream* st, int flags, bool buffered) {
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BytecodePrinter method_printer(flags);
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BytecodeStream s(method);
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s.set_interval(from, to);
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ResourceMark rm;
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stringStream ss;
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outputStream* out = buffered ? &ss : st;
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while (s.next() >= 0) {
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method_printer.trace(method, s.bcp(), out);
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}
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if (buffered) {
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st->print("%s", ss.as_string());
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}
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}
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void BytecodePrinter::print_constant(int cp_index, outputStream* st) {
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ConstantPool* constants = method()->constants();
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constantTag tag = constants->tag_at(cp_index);
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if (tag.is_int()) {
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st->print_cr(" " INT32_FORMAT, constants->int_at(cp_index));
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} else if (tag.is_long()) {
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st->print_cr(" " INT64_FORMAT, (int64_t)(constants->long_at(cp_index)));
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} else if (tag.is_float()) {
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st->print_cr(" %f", constants->float_at(cp_index));
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} else if (tag.is_double()) {
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st->print_cr(" %f", constants->double_at(cp_index));
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} else if (tag.is_string()) {
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const char* string = constants->unresolved_string_at(cp_index)->as_quoted_ascii();
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st->print_cr(" \"%s\"", string);
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} else if (tag.is_klass()) {
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st->print_cr(" %s", constants->resolved_klass_at(cp_index)->external_name());
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} else if (tag.is_unresolved_klass()) {
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st->print_cr(" %s", constants->klass_at_noresolve(cp_index)->as_quoted_ascii());
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} else if (tag.is_method_type()) {
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int i2 = constants->method_type_index_at(cp_index);
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st->print(" <MethodType> %d", i2);
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st->print_cr(" %s", constants->symbol_at(i2)->as_quoted_ascii());
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} else if (tag.is_method_handle()) {
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int kind = constants->method_handle_ref_kind_at(cp_index);
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int i2 = constants->method_handle_index_at(cp_index);
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st->print(" <MethodHandle of kind %d index at %d>", kind, i2);
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print_field_or_method(i2, st);
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} else if (tag.is_dynamic_constant()) {
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print_dynamic(cp_index, st);
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if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_DYNAMIC)) {
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print_bsm(cp_index, st);
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}
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} else {
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st->print_cr(" bad tag=%d at %d", tag.value(), cp_index);
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}
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}
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// Fieldref, Methodref, or InterfaceMethodref
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void BytecodePrinter::print_field_or_method(int cp_index, outputStream* st) {
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ConstantPool* constants = method()->constants();
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constantTag tag = constants->tag_at(cp_index);
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switch (tag.value()) {
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case JVM_CONSTANT_Fieldref:
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case JVM_CONSTANT_Methodref:
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case JVM_CONSTANT_InterfaceMethodref:
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break;
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default:
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st->print_cr(" bad tag=%d at %d", tag.value(), cp_index);
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return;
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}
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Symbol* name = constants->uncached_name_ref_at(cp_index);
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Symbol* signature = constants->uncached_signature_ref_at(cp_index);
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Symbol* klass = constants->klass_name_at(constants->uncached_klass_ref_index_at(cp_index));
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const char* sep = (tag.is_field() ? ":" : "");
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st->print_cr(" %d <%s.%s%s%s> ", cp_index, klass->as_C_string(), name->as_C_string(), sep, signature->as_C_string());
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}
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// JVM_CONSTANT_Dynamic or JVM_CONSTANT_InvokeDynamic
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void BytecodePrinter::print_dynamic(int cp_index, outputStream* st) {
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ConstantPool* constants = method()->constants();
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constantTag tag = constants->tag_at(cp_index);
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switch (tag.value()) {
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case JVM_CONSTANT_Dynamic:
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case JVM_CONSTANT_InvokeDynamic:
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break;
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default:
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st->print_cr(" bad tag=%d at %d", tag.value(), cp_index);
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return;
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}
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int bsm = constants->bootstrap_method_ref_index_at(cp_index);
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st->print(" bsm=%d", bsm);
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Symbol* name = constants->uncached_name_ref_at(cp_index);
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Symbol* signature = constants->uncached_signature_ref_at(cp_index);
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const char* sep = tag.is_dynamic_constant() ? ":" : "";
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st->print_cr(" %d <%s%s%s>", cp_index, name->as_C_string(), sep, signature->as_C_string());
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}
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void BytecodePrinter::print_invokedynamic(int indy_index, int cp_index, outputStream* st) {
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print_dynamic(cp_index, st);
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if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_DYNAMIC)) {
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print_bsm(cp_index, st);
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if (use_cp_cache()) {
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ResolvedIndyEntry* indy_entry = constants()->resolved_indy_entry_at(indy_index);
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st->print(" ResolvedIndyEntry: ");
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indy_entry->print_on(st);
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}
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}
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}
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// cp_index: must be the cp_index of a JVM_CONSTANT_{Dynamic, DynamicInError, InvokeDynamic}
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void BytecodePrinter::print_bsm(int cp_index, outputStream* st) {
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assert(constants()->tag_at(cp_index).has_bootstrap(), "must be");
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int bsm = constants()->bootstrap_method_ref_index_at(cp_index);
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const char* ref_kind = "";
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switch (constants()->method_handle_ref_kind_at(bsm)) {
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case JVM_REF_getField : ref_kind = "REF_getField"; break;
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case JVM_REF_getStatic : ref_kind = "REF_getStatic"; break;
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case JVM_REF_putField : ref_kind = "REF_putField"; break;
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case JVM_REF_putStatic : ref_kind = "REF_putStatic"; break;
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case JVM_REF_invokeVirtual : ref_kind = "REF_invokeVirtual"; break;
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case JVM_REF_invokeStatic : ref_kind = "REF_invokeStatic"; break;
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case JVM_REF_invokeSpecial : ref_kind = "REF_invokeSpecial"; break;
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case JVM_REF_newInvokeSpecial : ref_kind = "REF_newInvokeSpecial"; break;
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case JVM_REF_invokeInterface : ref_kind = "REF_invokeInterface"; break;
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default : ShouldNotReachHere();
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}
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st->print(" BSM: %s", ref_kind);
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print_field_or_method(constants()->method_handle_index_at(bsm), st);
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int argc = constants()->bootstrap_argument_count_at(cp_index);
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st->print(" arguments[%d] = {", argc);
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if (argc > 0) {
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st->cr();
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for (int arg_i = 0; arg_i < argc; arg_i++) {
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int arg = constants()->bootstrap_argument_index_at(cp_index, arg_i);
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st->print(" ");
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print_constant(arg, st);
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}
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}
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st->print_cr(" }");
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}
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void BytecodePrinter::print_attributes(int bci, outputStream* st) {
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// Show attributes of pre-rewritten codes
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Bytecodes::Code code = Bytecodes::java_code(raw_code());
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// If the code doesn't have any fields there's nothing to print.
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// note this is ==1 because the tableswitch and lookupswitch are
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// zero size (for some reason) and we want to print stuff out for them.
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// Also skip this if we're truncating bytecode output
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if (TraceBytecodesTruncated || Bytecodes::length_for(code) == 1) {
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st->cr();
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return;
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}
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switch(code) {
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// Java specific bytecodes only matter.
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case Bytecodes::_bipush:
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st->print_cr(" " INT32_FORMAT, get_byte());
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break;
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case Bytecodes::_sipush:
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st->print_cr(" " INT32_FORMAT, get_short());
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break;
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case Bytecodes::_ldc:
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{
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int cp_index;
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if (Bytecodes::uses_cp_cache(raw_code())) {
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assert(use_cp_cache(), "fast ldc bytecode must be in linked classes");
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int obj_index = get_index_u1();
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cp_index = constants()->object_to_cp_index(obj_index);
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} else {
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cp_index = get_index_u1();
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}
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print_constant(cp_index, st);
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}
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break;
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case Bytecodes::_ldc_w:
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case Bytecodes::_ldc2_w:
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{
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int cp_index;
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if (Bytecodes::uses_cp_cache(raw_code())) {
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assert(use_cp_cache(), "fast ldc bytecode must be in linked classes");
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int obj_index = get_native_index_u2();
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cp_index = constants()->object_to_cp_index(obj_index);
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} else {
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cp_index = get_Java_index_u2();
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}
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print_constant(cp_index, st);
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}
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break;
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case Bytecodes::_iload:
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case Bytecodes::_lload:
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case Bytecodes::_fload:
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case Bytecodes::_dload:
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case Bytecodes::_aload:
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case Bytecodes::_istore:
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case Bytecodes::_lstore:
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case Bytecodes::_fstore:
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case Bytecodes::_dstore:
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case Bytecodes::_astore:
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st->print_cr(" #%d", get_index_special());
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break;
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case Bytecodes::_iinc:
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{ int index = get_index_special();
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jint offset = is_wide() ? get_short(): get_byte();
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st->print_cr(" #%d " INT32_FORMAT, index, offset);
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}
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break;
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case Bytecodes::_newarray: {
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BasicType atype = (BasicType)get_index_u1();
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const char* str = type2name(atype);
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if (str == nullptr || is_reference_type(atype)) {
|
|
assert(false, "Unidentified basic type");
|
|
}
|
|
st->print_cr(" %s", str);
|
|
}
|
|
break;
|
|
case Bytecodes::_anewarray: {
|
|
int klass_index = get_Java_index_u2();
|
|
ConstantPool* constants = method()->constants();
|
|
Symbol* name = constants->klass_name_at(klass_index);
|
|
st->print_cr(" %s ", name->as_C_string());
|
|
}
|
|
break;
|
|
case Bytecodes::_multianewarray: {
|
|
int klass_index = get_Java_index_u2();
|
|
int nof_dims = get_index_u1();
|
|
ConstantPool* constants = method()->constants();
|
|
Symbol* 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);
|
|
const char *comma = "";
|
|
for (int ll = lo; ll <= hi; ll++) {
|
|
int idx = ll - lo;
|
|
st->print("%s %d:" INT32_FORMAT " (delta: %d)", comma, ll, dest[idx], dest[idx]-bci);
|
|
comma = ",";
|
|
}
|
|
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);
|
|
const char *comma = "";
|
|
for (int ll = 0; ll < len; ll++) {
|
|
st->print("%s " INT32_FORMAT ":" INT32_FORMAT, comma, key[ll], dest[ll]);
|
|
comma = ",";
|
|
}
|
|
st->cr();
|
|
}
|
|
break;
|
|
|
|
case Bytecodes::_putstatic:
|
|
case Bytecodes::_getstatic:
|
|
case Bytecodes::_putfield:
|
|
case Bytecodes::_getfield:
|
|
{
|
|
int cp_index;
|
|
if (use_cp_cache()) {
|
|
int field_index = get_native_index_u2();
|
|
cp_index = cpcache()->resolved_field_entry_at(field_index)->constant_pool_index();
|
|
} else {
|
|
cp_index = get_Java_index_u2();
|
|
}
|
|
print_field_or_method(cp_index, st);
|
|
}
|
|
break;
|
|
|
|
case Bytecodes::_invokevirtual:
|
|
case Bytecodes::_invokespecial:
|
|
case Bytecodes::_invokestatic:
|
|
{
|
|
int cp_index;
|
|
if (use_cp_cache()) {
|
|
int method_index = get_native_index_u2();
|
|
ResolvedMethodEntry* method_entry = cpcache()->resolved_method_entry_at(method_index);
|
|
cp_index = method_entry->constant_pool_index();
|
|
print_field_or_method(cp_index, st);
|
|
|
|
if (raw_code() == Bytecodes::_invokehandle &&
|
|
ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_METHOD_HANDLE)) {
|
|
assert(use_cp_cache(), "invokehandle is only in rewritten methods");
|
|
method_entry->print_on(st);
|
|
if (method_entry->has_appendix()) {
|
|
st->print(" appendix: ");
|
|
constants()->resolved_reference_from_method(method_index)->print_on(st);
|
|
}
|
|
}
|
|
} else {
|
|
cp_index = get_Java_index_u2();
|
|
print_field_or_method(cp_index, st);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case Bytecodes::_invokeinterface:
|
|
{
|
|
int cp_index;
|
|
if (use_cp_cache()) {
|
|
int method_index = get_native_index_u2();
|
|
cp_index = cpcache()->resolved_method_entry_at(method_index)->constant_pool_index();
|
|
} else {
|
|
cp_index = get_Java_index_u2();
|
|
}
|
|
int count = get_index_u1(); // TODO: this is not printed.
|
|
get_byte(); // ignore zero byte
|
|
print_field_or_method(cp_index, st);
|
|
}
|
|
break;
|
|
|
|
case Bytecodes::_invokedynamic:
|
|
{
|
|
int indy_index;
|
|
int cp_index;
|
|
if (use_cp_cache()) {
|
|
indy_index = get_native_index_u4();
|
|
cp_index = constants()->resolved_indy_entry_at(indy_index)->constant_pool_index();
|
|
} else {
|
|
indy_index = -1;
|
|
cp_index = get_Java_index_u2();
|
|
get_byte(); // ignore zero byte
|
|
get_byte(); // ignore zero byte
|
|
}
|
|
print_invokedynamic(indy_index, cp_index, st);
|
|
}
|
|
break;
|
|
|
|
case Bytecodes::_new:
|
|
case Bytecodes::_checkcast:
|
|
case Bytecodes::_instanceof:
|
|
{ int i = get_Java_index_u2();
|
|
ConstantPool* constants = method()->constants();
|
|
Symbol* 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::print_method_data_at(int bci, outputStream* st) {
|
|
MethodData* mdo = method()->method_data();
|
|
if (mdo != nullptr) {
|
|
|
|
// Lock to read ProfileData, and ensure lock is not broken by a safepoint
|
|
MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
|
|
|
|
ProfileData* data = mdo->bci_to_data(bci);
|
|
if (data != nullptr) {
|
|
st->print(" %d ", mdo->dp_to_di(data->dp()));
|
|
st->fill_to(7);
|
|
data->print_data_on(st, mdo);
|
|
}
|
|
}
|
|
}
|