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7140924: SIGSEGV in compiled code for sun.awt.X11.XDecoratedPeer.updateMinSizeHints

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Use unknown_obj instead of empty_map for NULL or Constant Pool object constants in bytecode Escape Analyzer.

Reviewed-by: iveresov, never
This commit is contained in:
Vladimir Kozlov 2012-01-31 07:18:03 -08:00
parent 082b8cb318
commit 1b91bcb342
1 changed files with 4 additions and 2 deletions
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6
hotspot/src/share/vm/ci/bcEscapeAnalyzer.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2005, 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
@ -359,7 +359,7 @@ void BCEscapeAnalyzer::iterate_one_block(ciBlock *blk, StateInfo &state, Growabl
case Bytecodes::_nop:
break;
case Bytecodes::_aconst_null:
state.apush(empty_map);
state.apush(unknown_obj);
break;
case Bytecodes::_iconst_m1:
case Bytecodes::_iconst_0:
@ -392,6 +392,8 @@ void BCEscapeAnalyzer::iterate_one_block(ciBlock *blk, StateInfo &state, Growabl
if (tag.is_long() || tag.is_double()) {
// Only longs and doubles use 2 stack slots.
state.lpush();
} else if (tag.basic_type() == T_OBJECT) {
state.apush(unknown_obj);
} else {
state.spush();
}