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6873116: Modify reexecute implementation to use pcDesc to record the reexecute bit

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Use PcDesc to keep record of the reexecute bit instead of using DebugInfoStreams

Reviewed-by: kvn, never, twisti
This commit is contained in:
Changpeng Fang 2009-08-20 12:42:57 -07:00
parent 15b6cdf897
commit ff9a1bddb5
16 changed files with 76 additions and 58 deletions
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13
hotspot/src/share/vm/code/pcDesc.hpp
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@ -1,5 +1,5 @@
/*
* Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
* Copyright 1997-2009 Sun Microsystems, Inc. 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
@ -34,6 +34,13 @@ class PcDesc VALUE_OBJ_CLASS_SPEC {
int _scope_decode_offset; // offset for scope in nmethod
int _obj_decode_offset;
union PcDescFlags {
int word;
struct {
unsigned int reexecute: 1;
} bits;
} _flags;
public:
int pc_offset() const { return _pc_offset; }
int scope_decode_offset() const { return _scope_decode_offset; }
@ -53,6 +60,10 @@ class PcDesc VALUE_OBJ_CLASS_SPEC {
upper_offset_limit = (unsigned int)-1 >> 1
};
// Flags
bool should_reexecute() const { return _flags.bits.reexecute; }
void set_should_reexecute(bool z) { _flags.bits.reexecute = z; }
// Returns the real pc
address real_pc(const nmethod* code) const;