222 return s.is_first_frame();
223 }
224
225
226 bool frame::entry_frame_is_first() const {
227 return entry_frame_call_wrapper()->is_first_frame();
228 }
229
230 JavaCallWrapper* frame::entry_frame_call_wrapper_if_safe(JavaThread* thread) const {
231 JavaCallWrapper** jcw = entry_frame_call_wrapper_addr();
232 address addr = (address) jcw;
233
234 // addr must be within the usable part of the stack
235 if (thread->is_in_usable_stack(addr)) {
236 return *jcw;
237 }
238
239 return NULL;
240 }
241
242 bool frame::should_be_deoptimized() const {
243 if (_deopt_state == is_deoptimized ||
244 !is_compiled_frame() ) return false;
245 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod");
246 nmethod* nm = (nmethod *)_cb;
247 if (TraceDependencies) {
248 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false");
249 nm->print_value_on(tty);
250 tty->cr();
251 }
252
253 if( !nm->is_marked_for_deoptimization() )
254 return false;
255
256 // If at the return point, then the frame has already been popped, and
257 // only the return needs to be executed. Don't deoptimize here.
258 return !nm->is_at_poll_return(pc());
259 }
260
261 bool frame::can_be_deoptimized() const {
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222 return s.is_first_frame();
223 }
224
225
226 bool frame::entry_frame_is_first() const {
227 return entry_frame_call_wrapper()->is_first_frame();
228 }
229
230 JavaCallWrapper* frame::entry_frame_call_wrapper_if_safe(JavaThread* thread) const {
231 JavaCallWrapper** jcw = entry_frame_call_wrapper_addr();
232 address addr = (address) jcw;
233
234 // addr must be within the usable part of the stack
235 if (thread->is_in_usable_stack(addr)) {
236 return *jcw;
237 }
238
239 return NULL;
240 }
241
242 bool frame::is_entry_frame_valid(JavaThread* thread) const {
243 // Validate the JavaCallWrapper an entry frame must have
244 address jcw = (address)entry_frame_call_wrapper();
245 bool jcw_safe = (jcw < thread->stack_base()) && (jcw > (address)fp()); // less than stack base
246 if (!jcw_safe) {
247 return false;
248 }
249
250 // Validate sp saved in the java frame anchor
251 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();
252 return (jfa->last_Java_sp() > sp());
253 }
254
255 bool frame::should_be_deoptimized() const {
256 if (_deopt_state == is_deoptimized ||
257 !is_compiled_frame() ) return false;
258 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod");
259 nmethod* nm = (nmethod *)_cb;
260 if (TraceDependencies) {
261 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false");
262 nm->print_value_on(tty);
263 tty->cr();
264 }
265
266 if( !nm->is_marked_for_deoptimization() )
267 return false;
268
269 // If at the return point, then the frame has already been popped, and
270 // only the return needs to be executed. Don't deoptimize here.
271 return !nm->is_at_poll_return(pc());
272 }
273
274 bool frame::can_be_deoptimized() const {
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