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8057038: Speculative traps not robust when compilation and class unloading are concurrent

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Speculative traps can be removed from MDO while being copied by compiler

Reviewed-by: kvn, iveresov
This commit is contained in:
Roland Westrelin 2014-08-02 06:15:23 +02:00
parent dc2c903e43
commit a2d18a0238
4 changed files with 63 additions and 34 deletions
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10
hotspot/src/share/vm/ci/ciMethodData.hpp
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@ -410,6 +410,9 @@ private:
// Area dedicated to parameters. NULL if no parameter profiling for
// this method.
DataLayout* _parameters;
int parameters_size() const {
return _parameters == NULL ? 0 : parameters_type_data()->size_in_bytes();
}
ciMethodData(MethodData* md);
ciMethodData();
@ -461,9 +464,6 @@ private:
address data_base() const {
return (address) _data;
}
DataLayout* limit_data_position() const {
return (DataLayout*)((address)data_base() + _data_size);
}
void load_extra_data();
ciProfileData* bci_to_extra_data(int bci, ciMethod* m, bool& two_free_slots);
@ -524,7 +524,9 @@ public:
ciProfileData* next_data(ciProfileData* current);
bool is_valid(ciProfileData* current) { return current != NULL; }
DataLayout* extra_data_base() const { return limit_data_position(); }
DataLayout* extra_data_base() const { return data_layout_at(data_size()); }
DataLayout* args_data_limit() const { return data_layout_at(data_size() + extra_data_size() -
parameters_size()); }
// Get the data at an arbitrary bci, or NULL if there is none. If m
// is not NULL look for a SpeculativeTrapData if any first.