Mercurial > hg > graal-compiler
view src/share/vm/runtime/relocator.hpp @ 12277:c1d7040a1183
8022836: JVM crashes in JVMTIENVBASE::GET_CURRENT_CONTENDED_MONITOR and GET_OWNED_MONITOR
Summary: Check that the _java_thread parameter is valid when it is possible that the JavaThread has exited after the initial checks were made in generated/jvmtifiles/jvmtiEnter.cpp: jvmti_GetCurrentContendedMonitor()
Reviewed-by: dcubed, dsamersoff
author | sgabdura |
---|---|
date | Wed, 18 Sep 2013 16:48:49 +0400 |
parents | da91efe96a93 |
children |
line wrap: on
line source
/* * Copyright (c) 1997, 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. * */ #ifndef SHARE_VM_RUNTIME_RELOCATOR_HPP #define SHARE_VM_RUNTIME_RELOCATOR_HPP #include "interpreter/bytecodes.hpp" #include "oops/method.hpp" #ifdef TARGET_ARCH_x86 # include "bytes_x86.hpp" #endif #ifdef TARGET_ARCH_sparc # include "bytes_sparc.hpp" #endif #ifdef TARGET_ARCH_zero # include "bytes_zero.hpp" #endif #ifdef TARGET_ARCH_arm # include "bytes_arm.hpp" #endif #ifdef TARGET_ARCH_ppc # include "bytes_ppc.hpp" #endif // This code has been converted from the 1.1E java virtual machine // Thanks to the JavaTopics group for using the code class ChangeItem; // Callback object for code relocations class RelocatorListener : public StackObj { public: RelocatorListener() {}; virtual void relocated(int bci, int delta, int new_method_size) = 0; }; class Relocator : public ResourceObj { public: Relocator(methodHandle method, RelocatorListener* listener); methodHandle insert_space_at(int bci, int space, u_char inst_buffer[], TRAPS); // Callbacks from ChangeItem's bool handle_code_changes(); bool handle_widen (int bci, int new_ilen, u_char inst_buffer[]); // handles general instructions void push_jump_widen (int bci, int delta, int new_delta); // pushes jumps bool handle_jump_widen (int bci, int delta); // handles jumps bool handle_switch_pad (int bci, int old_pad, bool is_lookup_switch); // handles table and lookup switches private: unsigned char* _code_array; int _code_array_length; int _code_length; unsigned char* _compressed_line_number_table; int _compressed_line_number_table_size; methodHandle _method; u_char _overwrite[3]; // stores overwritten bytes for shrunken instructions GrowableArray<ChangeItem*>* _changes; unsigned char* code_array() const { return _code_array; } void set_code_array(unsigned char* array) { _code_array = array; } int code_length() const { return _code_length; } void set_code_length(int length) { _code_length = length; } int code_array_length() const { return _code_array_length; } void set_code_array_length(int length) { _code_array_length = length; } unsigned char* compressed_line_number_table() const { return _compressed_line_number_table; } void set_compressed_line_number_table(unsigned char* table) { _compressed_line_number_table = table; } int compressed_line_number_table_size() const { return _compressed_line_number_table_size; } void set_compressed_line_number_table_size(int size) { _compressed_line_number_table_size = size; } methodHandle method() const { return _method; } void set_method(methodHandle method) { _method = method; } // This will return a raw bytecode, which is possibly rewritten. Bytecodes::Code code_at(int bci) const { return (Bytecodes::Code) code_array()[bci]; } void code_at_put(int bci, Bytecodes::Code code) { code_array()[bci] = (char) code; } // get and set signed integers in the code_array inline int int_at(int bci) const { return Bytes::get_Java_u4(&code_array()[bci]); } inline void int_at_put(int bci, int value) { Bytes::put_Java_u4(&code_array()[bci], value); } // get and set signed shorts in the code_array inline short short_at(int bci) const { return (short)Bytes::get_Java_u2(&code_array()[bci]); } inline void short_at_put(int bci, short value) { Bytes::put_Java_u2((address) &code_array()[bci], value); } // get the address of in the code_array inline char* addr_at(int bci) const { return (char*) &code_array()[bci]; } int instruction_length_at(int bci) { return Bytecodes::length_at(NULL, code_array() + bci); } // Helper methods int align(int n) const { return (n+3) & ~3; } int code_slop_pct() const { return 25; } bool is_opcode_lookupswitch(Bytecodes::Code bc); // basic relocation methods bool relocate_code (int bci, int ilen, int delta); void change_jumps (int break_bci, int delta); void change_jump (int bci, int offset, bool is_short, int break_bci, int delta); void adjust_exception_table(int bci, int delta); void adjust_line_no_table (int bci, int delta); void adjust_local_var_table(int bci, int delta); void adjust_stack_map_table(int bci, int delta); int get_orig_switch_pad (int bci, bool is_lookup_switch); int rc_instr_len (int bci); bool expand_code_array (int delta); // Callback support RelocatorListener *_listener; void notify(int bci, int delta, int new_code_length) { if (_listener != NULL) _listener->relocated(bci, delta, new_code_length); } }; #endif // SHARE_VM_RUNTIME_RELOCATOR_HPP