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8152479: Coded byte streams

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Reviewed-by: acorn, mschoene, asmotrak
This commit is contained in:
Harold Seigel 2016-04-06 07:55:32 -04:00 • committed by Harold Seigel
parent 86e696a816
commit 99c24f5f1c
2 changed files with 28 additions and 21 deletions
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10
hotspot/src/share/vm/interpreter/bytecodeStream.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2016, 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
@ -31,12 +31,12 @@ Bytecodes::Code RawBytecodeStream::raw_next_special(Bytecodes::Code code) {
// set next bytecode position
address bcp = RawBytecodeStream::bcp();
address end = method()->code_base() + end_bci();
int l = Bytecodes::raw_special_length_at(bcp, end);
if (l <= 0 || (_bci + l) > _end_bci) {
int len = Bytecodes::raw_special_length_at(bcp, end);
// Very large tableswitch or lookupswitch size can cause _next_bci to overflow.
if (len <= 0 || (_bci > _end_bci - len) || (_bci - len >= _next_bci)) {
code = Bytecodes::_illegal;
} else {
_next_bci += l;
assert(_bci < _next_bci, "length must be > 0");
_next_bci += len;
// set attributes
_is_wide = false;
// check for special (uncommon) cases