Mercurial > hg > graal-jvmci-8
view src/share/vm/classfile/stackMapFrame.cpp @ 6972:bd7a7ce2e264
6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com
author | minqi |
---|---|
date | Mon, 12 Nov 2012 14:03:53 -0800 |
parents | 4ee06e614636 |
children | 2373a1f4987c b2daaf70fab2 |
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/* * Copyright (c) 2003, 2012, 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 "classfile/stackMapFrame.hpp" #include "classfile/verifier.hpp" #include "memory/resourceArea.hpp" #include "oops/oop.inline.hpp" #include "oops/symbol.hpp" #include "runtime/handles.inline.hpp" #include "utilities/globalDefinitions.hpp" StackMapFrame::StackMapFrame(u2 max_locals, u2 max_stack, ClassVerifier* v) : _offset(0), _locals_size(0), _stack_size(0), _stack_mark(0), _flags(0), _max_locals(max_locals), _max_stack(max_stack), _verifier(v) { Thread* thr = v->thread(); _locals = NEW_RESOURCE_ARRAY_IN_THREAD(thr, VerificationType, max_locals); _stack = NEW_RESOURCE_ARRAY_IN_THREAD(thr, VerificationType, max_stack); int32_t i; for(i = 0; i < max_locals; i++) { _locals[i] = VerificationType::bogus_type(); } for(i = 0; i < max_stack; i++) { _stack[i] = VerificationType::bogus_type(); } } StackMapFrame* StackMapFrame::frame_in_exception_handler(u1 flags) { Thread* thr = _verifier->thread(); VerificationType* stack = NEW_RESOURCE_ARRAY_IN_THREAD(thr, VerificationType, 1); StackMapFrame* frame = new StackMapFrame(_offset, flags, _locals_size, 0, _max_locals, _max_stack, _locals, stack, _verifier); return frame; } bool StackMapFrame::has_new_object() const { int32_t i; for (i = 0; i < _max_locals; i++) { if (_locals[i].is_uninitialized()) { return true; } } for (i = 0; i < _stack_size; i++) { if (_stack[i].is_uninitialized()) { return true; } } return false; } void StackMapFrame::initialize_object( VerificationType old_object, VerificationType new_object) { int32_t i; for (i = 0; i < _max_locals; i++) { if (_locals[i].equals(old_object)) { _locals[i] = new_object; } } for (i = 0; i < _stack_size; i++) { if (_stack[i].equals(old_object)) { _stack[i] = new_object; } } if (old_object == VerificationType::uninitialized_this_type()) { // "this" has been initialized - reset flags _flags = 0; } } VerificationType StackMapFrame::set_locals_from_arg( const methodHandle m, VerificationType thisKlass, TRAPS) { SignatureStream ss(m->signature()); int init_local_num = 0; if (!m->is_static()) { init_local_num++; // add one extra argument for instance method if (m->name() == vmSymbols::object_initializer_name() && thisKlass.name() != vmSymbols::java_lang_Object()) { _locals[0] = VerificationType::uninitialized_this_type(); _flags |= FLAG_THIS_UNINIT; } else { _locals[0] = thisKlass; } } // local num may be greater than size of parameters because long/double occupies two slots while(!ss.at_return_type()) { init_local_num += _verifier->change_sig_to_verificationType( &ss, &_locals[init_local_num], CHECK_VERIFY_(verifier(), VerificationType::bogus_type())); ss.next(); } _locals_size = init_local_num; switch (ss.type()) { case T_OBJECT: case T_ARRAY: { Symbol* sig = ss.as_symbol(CHECK_(VerificationType::bogus_type())); // Create another symbol to save as signature stream unreferences // this symbol. Symbol* sig_copy = verifier()->create_temporary_symbol(sig, 0, sig->utf8_length(), CHECK_(VerificationType::bogus_type())); assert(sig_copy == sig, "symbols don't match"); return VerificationType::reference_type(sig_copy); } case T_INT: return VerificationType::integer_type(); case T_BYTE: return VerificationType::byte_type(); case T_CHAR: return VerificationType::char_type(); case T_SHORT: return VerificationType::short_type(); case T_BOOLEAN: return VerificationType::boolean_type(); case T_FLOAT: return VerificationType::float_type(); case T_DOUBLE: return VerificationType::double_type(); case T_LONG: return VerificationType::long_type(); case T_VOID: return VerificationType::bogus_type(); default: ShouldNotReachHere(); } return VerificationType::bogus_type(); } void StackMapFrame::copy_locals(const StackMapFrame* src) { int32_t len = src->locals_size() < _locals_size ? src->locals_size() : _locals_size; for (int32_t i = 0; i < len; i++) { _locals[i] = src->locals()[i]; } } void StackMapFrame::copy_stack(const StackMapFrame* src) { int32_t len = src->stack_size() < _stack_size ? src->stack_size() : _stack_size; for (int32_t i = 0; i < len; i++) { _stack[i] = src->stack()[i]; } } // Returns the location of the first mismatch, or 'len' if there are no // mismatches int StackMapFrame::is_assignable_to( VerificationType* from, VerificationType* to, int32_t len, TRAPS) const { int32_t i = 0; for (i = 0; i < len; i++) { if (!to[i].is_assignable_from(from[i], verifier(), THREAD)) { break; } } return i; } bool StackMapFrame::has_flag_match_exception( const StackMapFrame* target) const { // We allow flags of {UninitThis} to assign to {} if-and-only-if the // target frame does not depend upon the current type. // This is slightly too strict, as we need only enforce that the // slots that were initialized by the <init> (the things that were // UninitializedThis before initialize_object() converted them) are unused. // However we didn't save that information so we'll enforce this upon // anything that might have been initialized. This is a rare situation // and javac never generates code that would end up here, but some profilers // (such as NetBeans) might, when adding exception handlers in <init> // methods to cover the invokespecial instruction. See 7020118. assert(max_locals() == target->max_locals() && stack_size() == target->stack_size(), "StackMap sizes must match"); VerificationType top = VerificationType::top_type(); VerificationType this_type = verifier()->current_type(); if (!flag_this_uninit() || target->flags() != 0) { return false; } for (int i = 0; i < target->locals_size(); ++i) { if (locals()[i] == this_type && target->locals()[i] != top) { return false; } } for (int i = 0; i < target->stack_size(); ++i) { if (stack()[i] == this_type && target->stack()[i] != top) { return false; } } return true; } bool StackMapFrame::is_assignable_to( const StackMapFrame* target, bool is_exception_handler, ErrorContext* ctx, TRAPS) const { if (_max_locals != target->max_locals()) { *ctx = ErrorContext::locals_size_mismatch( _offset, (StackMapFrame*)this, (StackMapFrame*)target); return false; } if (_stack_size != target->stack_size()) { *ctx = ErrorContext::stack_size_mismatch( _offset, (StackMapFrame*)this, (StackMapFrame*)target); return false; } // Only need to compare type elements up to target->locals() or target->stack(). // The remaining type elements in this state can be ignored because they are // assignable to bogus type. int mismatch_loc; mismatch_loc = is_assignable_to( _locals, target->locals(), target->locals_size(), THREAD); if (mismatch_loc != target->locals_size()) { *ctx = ErrorContext::bad_type(target->offset(), TypeOrigin::local(mismatch_loc, (StackMapFrame*)this), TypeOrigin::sm_local(mismatch_loc, (StackMapFrame*)target)); return false; } mismatch_loc = is_assignable_to(_stack, target->stack(), _stack_size, THREAD); if (mismatch_loc != _stack_size) { *ctx = ErrorContext::bad_type(target->offset(), TypeOrigin::stack(mismatch_loc, (StackMapFrame*)this), TypeOrigin::sm_stack(mismatch_loc, (StackMapFrame*)target)); return false; } bool match_flags = (_flags | target->flags()) == target->flags(); if (match_flags || is_exception_handler && has_flag_match_exception(target)) { return true; } else { *ctx = ErrorContext::bad_flags(target->offset(), (StackMapFrame*)this, (StackMapFrame*)target); return false; } } VerificationType StackMapFrame::pop_stack_ex(VerificationType type, TRAPS) { if (_stack_size <= 0) { verifier()->verify_error( ErrorContext::stack_underflow(_offset, this), "Operand stack underflow"); return VerificationType::bogus_type(); } VerificationType top = _stack[--_stack_size]; bool subtype = type.is_assignable_from( top, verifier(), CHECK_(VerificationType::bogus_type())); if (!subtype) { verifier()->verify_error( ErrorContext::bad_type(_offset, stack_top_ctx(), TypeOrigin::implicit(type)), "Bad type on operand stack"); return VerificationType::bogus_type(); } return top; } VerificationType StackMapFrame::get_local( int32_t index, VerificationType type, TRAPS) { if (index >= _max_locals) { verifier()->verify_error( ErrorContext::bad_local_index(_offset, index), "Local variable table overflow"); return VerificationType::bogus_type(); } bool subtype = type.is_assignable_from(_locals[index], verifier(), CHECK_(VerificationType::bogus_type())); if (!subtype) { verifier()->verify_error( ErrorContext::bad_type(_offset, TypeOrigin::local(index, this), TypeOrigin::implicit(type)), "Bad local variable type"); return VerificationType::bogus_type(); } if(index >= _locals_size) { _locals_size = index + 1; } return _locals[index]; } void StackMapFrame::get_local_2( int32_t index, VerificationType type1, VerificationType type2, TRAPS) { assert(type1.is_long() || type1.is_double(), "must be long/double"); assert(type2.is_long2() || type2.is_double2(), "must be long/double_2"); if (index >= _locals_size - 1) { verifier()->verify_error( ErrorContext::bad_local_index(_offset, index), "get long/double overflows locals"); return; } bool subtype = type1.is_assignable_from(_locals[index], verifier(), CHECK); if (!subtype) { verifier()->verify_error( ErrorContext::bad_type(_offset, TypeOrigin::local(index, this), TypeOrigin::implicit(type1)), "Bad local variable type"); } else { subtype = type2.is_assignable_from(_locals[index + 1], verifier(), CHECK); if (!subtype) { /* Unreachable? All local store routines convert a split long or double * into a TOP during the store. So we should never end up seeing an * orphaned half. */ verifier()->verify_error( ErrorContext::bad_type(_offset, TypeOrigin::local(index + 1, this), TypeOrigin::implicit(type2)), "Bad local variable type"); } } } void StackMapFrame::set_local(int32_t index, VerificationType type, TRAPS) { assert(!type.is_check(), "Must be a real type"); if (index >= _max_locals) { verifier()->verify_error( ErrorContext::bad_local_index(_offset, index), "Local variable table overflow"); return; } // If type at index is double or long, set the next location to be unusable if (_locals[index].is_double() || _locals[index].is_long()) { assert((index + 1) < _locals_size, "Local variable table overflow"); _locals[index + 1] = VerificationType::bogus_type(); } // If type at index is double_2 or long_2, set the previous location to be unusable if (_locals[index].is_double2() || _locals[index].is_long2()) { assert(index >= 1, "Local variable table underflow"); _locals[index - 1] = VerificationType::bogus_type(); } _locals[index] = type; if (index >= _locals_size) { #ifdef ASSERT for (int i=_locals_size; i<index; i++) { assert(_locals[i] == VerificationType::bogus_type(), "holes must be bogus type"); } #endif _locals_size = index + 1; } } void StackMapFrame::set_local_2( int32_t index, VerificationType type1, VerificationType type2, TRAPS) { assert(type1.is_long() || type1.is_double(), "must be long/double"); assert(type2.is_long2() || type2.is_double2(), "must be long/double_2"); if (index >= _max_locals - 1) { verifier()->verify_error( ErrorContext::bad_local_index(_offset, index), "Local variable table overflow"); return; } // If type at index+1 is double or long, set the next location to be unusable if (_locals[index+1].is_double() || _locals[index+1].is_long()) { assert((index + 2) < _locals_size, "Local variable table overflow"); _locals[index + 2] = VerificationType::bogus_type(); } // If type at index is double_2 or long_2, set the previous location to be unusable if (_locals[index].is_double2() || _locals[index].is_long2()) { assert(index >= 1, "Local variable table underflow"); _locals[index - 1] = VerificationType::bogus_type(); } _locals[index] = type1; _locals[index+1] = type2; if (index >= _locals_size - 1) { #ifdef ASSERT for (int i=_locals_size; i<index; i++) { assert(_locals[i] == VerificationType::bogus_type(), "holes must be bogus type"); } #endif _locals_size = index + 2; } } TypeOrigin StackMapFrame::stack_top_ctx() { return TypeOrigin::stack(_stack_size, this); } void StackMapFrame::print_on(outputStream* str) const { str->indent().print_cr("bci: @%d", _offset); str->indent().print_cr("flags: {%s }", flag_this_uninit() ? " flagThisUninit" : ""); str->indent().print("locals: {"); for (int32_t i = 0; i < _locals_size; ++i) { str->print(" "); _locals[i].print_on(str); if (i != _locals_size - 1) { str->print(","); } } str->print_cr(" }"); str->indent().print("stack: {"); for (int32_t j = 0; j < _stack_size; ++j) { str->print(" "); _stack[j].print_on(str); if (j != _stack_size - 1) { str->print(","); } } str->print_cr(" }"); }