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7023931: PcDescCache::find_pc_desc should not write _last_pc_desc

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Remove _last_pc_desc and use pcdescs[0] instead.

Reviewed-by: dcubed, coleenp, ysr
This commit is contained in:
Paul Hohensee 2011-03-11 16:09:55 -05:00
parent 4770417e71
commit f38a80b837
2 changed files with 21 additions and 19 deletions
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7
hotspot/src/share/vm/code/nmethod.hpp
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@ -69,14 +69,13 @@ class PcDescCache VALUE_OBJ_CLASS_SPEC {
friend class VMStructs;
private:
enum { cache_size = 4 };
PcDesc* _last_pc_desc; // most recent pc_desc found
PcDesc* _pc_descs[cache_size]; // last cache_size pc_descs found
public:
PcDescCache() { debug_only(_last_pc_desc = NULL); }
PcDescCache() { debug_only(_pc_descs[0] = NULL); }
void reset_to(PcDesc* initial_pc_desc);
PcDesc* find_pc_desc(int pc_offset, bool approximate);
void add_pc_desc(PcDesc* pc_desc);
PcDesc* last_pc_desc() { return _last_pc_desc; }
PcDesc* last_pc_desc() { return _pc_descs[0]; }
};
@ -178,7 +177,7 @@ class nmethod : public CodeBlob {
unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes?
// Protected by Patching_lock
unsigned char _state; // {alive, not_entrant, zombie, unloaded)
unsigned char _state; // {alive, not_entrant, zombie, unloaded}
#ifdef ASSERT
bool _oops_are_stale; // indicates that it's no longer safe to access oops section