167 }
168 }
169
170 _location_valid[0] = lv;
171 check_location_valid();
172 }
173
174 bool frame::safe_for_sender(JavaThread *thread) {
175
176 address _SP = (address) sp();
177 address _FP = (address) fp();
178 address _UNEXTENDED_SP = (address) unextended_sp();
179 // sp must be within the stack
180 bool sp_safe = (_SP <= thread->stack_base()) &&
181 (_SP >= thread->stack_base() - thread->stack_size());
182
183 if (!sp_safe) {
184 return false;
185 }
186
187 // unextended sp must be within the stack and above or equal sp
188 bool unextended_sp_safe = (_UNEXTENDED_SP <= thread->stack_base()) &&
189 (_UNEXTENDED_SP >= _SP);
190
191 if (!unextended_sp_safe) return false;
192
193 // an fp must be within the stack and above (but not equal) sp
194 bool fp_safe = (_FP <= thread->stack_base()) &&
195 (_FP > _SP);
196
197 // We know sp/unextended_sp are safe only fp is questionable here
198
199 // If the current frame is known to the code cache then we can attempt to
200 // to construct the sender and do some validation of it. This goes a long way
201 // toward eliminating issues when we get in frame construction code
202
203 if (_cb != NULL ) {
204
205 // First check if frame is complete and tester is reliable
206 // Unfortunately we can only check frame complete for runtime stubs and nmethod
207 // other generic buffer blobs are more problematic so we just assume they are
208 // ok. adapter blobs never have a frame complete and are never ok.
209
|
167 }
168 }
169
170 _location_valid[0] = lv;
171 check_location_valid();
172 }
173
174 bool frame::safe_for_sender(JavaThread *thread) {
175
176 address _SP = (address) sp();
177 address _FP = (address) fp();
178 address _UNEXTENDED_SP = (address) unextended_sp();
179 // sp must be within the stack
180 bool sp_safe = (_SP <= thread->stack_base()) &&
181 (_SP >= thread->stack_base() - thread->stack_size());
182
183 if (!sp_safe) {
184 return false;
185 }
186
187 // unextended sp must be within the stack
188 bool unextended_sp_safe = (_UNEXTENDED_SP <= thread->stack_base());
189
190 if (!unextended_sp_safe) return false;
191
192 // an fp must be within the stack and above (but not equal) sp
193 bool fp_safe = (_FP <= thread->stack_base()) &&
194 (_FP > _SP);
195
196 // We know sp/unextended_sp are safe only fp is questionable here
197
198 // If the current frame is known to the code cache then we can attempt to
199 // to construct the sender and do some validation of it. This goes a long way
200 // toward eliminating issues when we get in frame construction code
201
202 if (_cb != NULL ) {
203
204 // First check if frame is complete and tester is reliable
205 // Unfortunately we can only check frame complete for runtime stubs and nmethod
206 // other generic buffer blobs are more problematic so we just assume they are
207 // ok. adapter blobs never have a frame complete and are never ok.
208
|