35 #include "runtime/javaCalls.hpp" |
35 #include "runtime/javaCalls.hpp" |
36 #include "runtime/vframe.hpp" |
36 #include "runtime/vframe.hpp" |
37 #include "utilities/globalDefinitions.hpp" |
37 #include "utilities/globalDefinitions.hpp" |
38 |
38 |
39 // setup and cleanup actions |
39 // setup and cleanup actions |
40 void JavaFrameStream::setup_magic_on_entry(objArrayHandle frames_array) { |
40 void BaseFrameStream::setup_magic_on_entry(objArrayHandle frames_array) { |
41 frames_array->obj_at_put(magic_pos, _thread->threadObj()); |
41 frames_array->obj_at_put(magic_pos, _thread->threadObj()); |
42 _anchor = address_value(); |
42 _anchor = address_value(); |
43 assert(check_magic(frames_array), "invalid magic"); |
43 assert(check_magic(frames_array), "invalid magic"); |
44 } |
44 } |
45 |
45 |
46 bool JavaFrameStream::check_magic(objArrayHandle frames_array) { |
46 bool BaseFrameStream::check_magic(objArrayHandle frames_array) { |
47 oop m1 = frames_array->obj_at(magic_pos); |
47 oop m1 = frames_array->obj_at(magic_pos); |
48 jlong m2 = _anchor; |
48 jlong m2 = _anchor; |
49 if (m1 == _thread->threadObj() && m2 == address_value()) return true; |
49 if (m1 == _thread->threadObj() && m2 == address_value()) return true; |
50 return false; |
50 return false; |
51 } |
51 } |
52 |
52 |
53 bool JavaFrameStream::cleanup_magic_on_exit(objArrayHandle frames_array) { |
53 bool BaseFrameStream::cleanup_magic_on_exit(objArrayHandle frames_array) { |
54 bool ok = check_magic(frames_array); |
54 bool ok = check_magic(frames_array); |
55 frames_array->obj_at_put(magic_pos, NULL); |
55 frames_array->obj_at_put(magic_pos, NULL); |
56 _anchor = 0L; |
56 _anchor = 0L; |
57 return ok; |
57 return ok; |
58 } |
58 } |
59 |
59 |
60 // Returns JavaFrameStream for the current stack being traversed. |
60 JavaFrameStream::JavaFrameStream(JavaThread* thread, int mode) |
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61 : BaseFrameStream(thread), _vfst(thread) { |
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62 _need_method_info = StackWalk::need_method_info(mode); |
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63 } |
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64 |
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65 // Returns the BaseFrameStream for the current stack being traversed. |
61 // |
66 // |
62 // Parameters: |
67 // Parameters: |
63 // thread Current Java thread. |
68 // thread Current Java thread. |
64 // magic Magic value used for each stack walking |
69 // magic Magic value used for each stack walking |
65 // frames_array User-supplied buffers. The 0th element is reserved |
70 // frames_array User-supplied buffers. The 0th element is reserved |
66 // to this JavaFrameStream to use |
71 // for this BaseFrameStream to use |
67 // |
72 // |
68 JavaFrameStream* JavaFrameStream::from_current(JavaThread* thread, jlong magic, |
73 BaseFrameStream* BaseFrameStream::from_current(JavaThread* thread, jlong magic, |
69 objArrayHandle frames_array) |
74 objArrayHandle frames_array) |
70 { |
75 { |
71 assert(thread != NULL && thread->is_Java_thread(), ""); |
76 assert(thread != NULL && thread->is_Java_thread(), ""); |
72 oop m1 = frames_array->obj_at(magic_pos); |
77 oop m1 = frames_array->obj_at(magic_pos); |
73 if (m1 != thread->threadObj()) return NULL; |
78 if (m1 != thread->threadObj()) return NULL; |
74 if (magic == 0L) return NULL; |
79 if (magic == 0L) return NULL; |
75 JavaFrameStream* stream = (JavaFrameStream*) (intptr_t) magic; |
80 BaseFrameStream* stream = (BaseFrameStream*) (intptr_t) magic; |
76 if (!stream->is_valid_in(thread, frames_array)) return NULL; |
81 if (!stream->is_valid_in(thread, frames_array)) return NULL; |
77 return stream; |
82 return stream; |
78 } |
83 } |
79 |
84 |
80 // Unpacks one or more frames into user-supplied buffers. |
85 // Unpacks one or more frames into user-supplied buffers. |
83 // Do not call vfst.next to advance over the last returned value. |
88 // Do not call vfst.next to advance over the last returned value. |
84 // In other words, do not leave any stale data in the vfst. |
89 // In other words, do not leave any stale data in the vfst. |
85 // |
90 // |
86 // Parameters: |
91 // Parameters: |
87 // mode Restrict which frames to be decoded. |
92 // mode Restrict which frames to be decoded. |
88 // JavaFrameStream stream of javaVFrames |
93 // BaseFrameStream stream of frames |
89 // max_nframes Maximum number of frames to be filled. |
94 // max_nframes Maximum number of frames to be filled. |
90 // start_index Start index to the user-supplied buffers. |
95 // start_index Start index to the user-supplied buffers. |
91 // frames_array Buffer to store Class or StackFrame in, starting at start_index. |
96 // frames_array Buffer to store Class or StackFrame in, starting at start_index. |
92 // frames array is a Class<?>[] array when only getting caller |
97 // frames array is a Class<?>[] array when only getting caller |
93 // reference, and a StackFrameInfo[] array (or derivative) |
98 // reference, and a StackFrameInfo[] array (or derivative) |
94 // otherwise. It should never be null. |
99 // otherwise. It should never be null. |
95 // end_index End index to the user-supplied buffers with unpacked frames. |
100 // end_index End index to the user-supplied buffers with unpacked frames. |
96 // |
101 // |
97 // Returns the number of frames whose information was transferred into the buffers. |
102 // Returns the number of frames whose information was transferred into the buffers. |
98 // |
103 // |
99 int StackWalk::fill_in_frames(jlong mode, JavaFrameStream& stream, |
104 int StackWalk::fill_in_frames(jlong mode, BaseFrameStream& stream, |
100 int max_nframes, int start_index, |
105 int max_nframes, int start_index, |
101 objArrayHandle frames_array, |
106 objArrayHandle frames_array, |
102 int& end_index, TRAPS) { |
107 int& end_index, TRAPS) { |
103 if (TraceStackWalk) { |
108 if (TraceStackWalk) { |
104 tty->print_cr("fill_in_frames limit=%d start=%d frames length=%d", |
109 tty->print_cr("fill_in_frames limit=%d start=%d frames length=%d", |
108 assert(start_index + max_nframes <= frames_array->length(), "oob"); |
113 assert(start_index + max_nframes <= frames_array->length(), "oob"); |
109 |
114 |
110 int frames_decoded = 0; |
115 int frames_decoded = 0; |
111 for (; !stream.at_end(); stream.next()) { |
116 for (; !stream.at_end(); stream.next()) { |
112 Method* method = stream.method(); |
117 Method* method = stream.method(); |
113 int bci = stream.bci(); |
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114 |
118 |
115 if (method == NULL) continue; |
119 if (method == NULL) continue; |
116 |
120 |
117 // skip hidden frames for default StackWalker option (i.e. SHOW_HIDDEN_FRAMES |
121 // skip hidden frames for default StackWalker option (i.e. SHOW_HIDDEN_FRAMES |
118 // not set) and when StackWalker::getCallerClass is called |
122 // not set) and when StackWalker::getCallerClass is called |
127 } |
131 } |
128 |
132 |
129 int index = end_index++; |
133 int index = end_index++; |
130 if (TraceStackWalk) { |
134 if (TraceStackWalk) { |
131 tty->print(" %d: frame method: ", index); method->print_short_name(); |
135 tty->print(" %d: frame method: ", index); method->print_short_name(); |
132 tty->print_cr(" bci=%d", bci); |
136 tty->print_cr(" bci=%d", stream.bci()); |
133 } |
137 } |
134 |
138 |
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139 if (!need_method_info(mode) && get_caller_class(mode) && |
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140 index == start_index && method->caller_sensitive()) { |
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141 ResourceMark rm(THREAD); |
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142 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), |
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143 err_msg("StackWalker::getCallerClass called from @CallerSensitive %s method", |
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144 method->name_and_sig_as_C_string())); |
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145 } |
135 // fill in StackFrameInfo and initialize MemberName |
146 // fill in StackFrameInfo and initialize MemberName |
136 if (live_frame_info(mode)) { |
147 stream.fill_frame(index, frames_array, method, CHECK_0); |
137 assert (use_frames_array(mode), "Bad mode for get live frame"); |
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138 Handle stackFrame(frames_array->obj_at(index)); |
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139 fill_live_stackframe(stackFrame, method, bci, stream.java_frame(), CHECK_0); |
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140 } else if (need_method_info(mode)) { |
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141 assert (use_frames_array(mode), "Bad mode for get stack frame"); |
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142 Handle stackFrame(frames_array->obj_at(index)); |
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143 fill_stackframe(stackFrame, method, bci); |
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144 } else { |
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145 assert (use_frames_array(mode) == false, "Bad mode for filling in Class object"); |
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146 if (get_caller_class(mode) && index == start_index && method->caller_sensitive()) { |
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147 ResourceMark rm(THREAD); |
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148 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), |
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149 err_msg("StackWalker::getCallerClass called from @CallerSensitive %s method", |
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150 method->name_and_sig_as_C_string())); |
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151 } |
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152 |
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153 frames_array->obj_at_put(index, method->method_holder()->java_mirror()); |
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154 } |
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155 if (++frames_decoded >= max_nframes) break; |
148 if (++frames_decoded >= max_nframes) break; |
156 } |
149 } |
157 return frames_decoded; |
150 return frames_decoded; |
158 } |
151 } |
159 |
152 |
160 static oop create_primitive_value_instance(StackValueCollection* values, int i, TRAPS) { |
153 // Fill in the LiveStackFrameInfo at the given index in frames_array |
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154 void LiveFrameStream::fill_frame(int index, objArrayHandle frames_array, |
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155 const methodHandle& method, TRAPS) { |
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156 Handle stackFrame(THREAD, frames_array->obj_at(index)); |
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157 fill_live_stackframe(stackFrame, method, CHECK); |
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158 } |
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159 |
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160 // Fill in the StackFrameInfo at the given index in frames_array |
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161 void JavaFrameStream::fill_frame(int index, objArrayHandle frames_array, |
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162 const methodHandle& method, TRAPS) { |
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163 if (_need_method_info) { |
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164 Handle stackFrame(THREAD, frames_array->obj_at(index)); |
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165 fill_stackframe(stackFrame, method); |
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166 } else { |
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167 frames_array->obj_at_put(index, method->method_holder()->java_mirror()); |
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168 } |
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169 } |
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170 |
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171 oop LiveFrameStream::create_primitive_value_instance(StackValueCollection* values, int i, TRAPS) { |
161 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::java_lang_LiveStackFrameInfo(), CHECK_NULL); |
172 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::java_lang_LiveStackFrameInfo(), CHECK_NULL); |
162 instanceKlassHandle ik (THREAD, k); |
173 instanceKlassHandle ik (THREAD, k); |
163 |
174 |
164 JavaValue result(T_OBJECT); |
175 JavaValue result(T_OBJECT); |
165 JavaCallArguments args; |
176 JavaCallArguments args; |
226 &args, |
237 &args, |
227 CHECK_NULL); |
238 CHECK_NULL); |
228 return (instanceOop) result.get_jobject(); |
239 return (instanceOop) result.get_jobject(); |
229 } |
240 } |
230 |
241 |
231 static objArrayHandle values_to_object_array(StackValueCollection* values, TRAPS) { |
242 objArrayHandle LiveFrameStream::values_to_object_array(StackValueCollection* values, TRAPS) { |
232 objArrayHandle empty; |
243 objArrayHandle empty; |
233 int length = values->size(); |
244 int length = values->size(); |
234 objArrayOop array_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), |
245 objArrayOop array_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), |
235 length, CHECK_(empty)); |
246 length, CHECK_(empty)); |
236 objArrayHandle array_h(THREAD, array_oop); |
247 objArrayHandle array_h(THREAD, array_oop); |
241 array_h->obj_at_put(i, obj); |
252 array_h->obj_at_put(i, obj); |
242 } |
253 } |
243 return array_h; |
254 return array_h; |
244 } |
255 } |
245 |
256 |
246 static objArrayHandle monitors_to_object_array(GrowableArray<MonitorInfo*>* monitors, TRAPS) { |
257 objArrayHandle LiveFrameStream::monitors_to_object_array(GrowableArray<MonitorInfo*>* monitors, TRAPS) { |
247 int length = monitors->length(); |
258 int length = monitors->length(); |
248 objArrayOop array_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), |
259 objArrayOop array_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), |
249 length, CHECK_(objArrayHandle())); |
260 length, CHECK_(objArrayHandle())); |
250 objArrayHandle array_h(THREAD, array_oop); |
261 objArrayHandle array_h(THREAD, array_oop); |
251 for (int i = 0; i < length; i++) { |
262 for (int i = 0; i < length; i++) { |
254 } |
265 } |
255 return array_h; |
266 return array_h; |
256 } |
267 } |
257 |
268 |
258 // Fill StackFrameInfo with declaringClass and bci and initialize memberName |
269 // Fill StackFrameInfo with declaringClass and bci and initialize memberName |
259 void StackWalk::fill_stackframe(Handle stackFrame, const methodHandle& method, int bci) { |
270 void BaseFrameStream::fill_stackframe(Handle stackFrame, const methodHandle& method) { |
260 java_lang_StackFrameInfo::set_declaringClass(stackFrame(), method->method_holder()->java_mirror()); |
271 java_lang_StackFrameInfo::set_declaringClass(stackFrame(), method->method_holder()->java_mirror()); |
261 java_lang_StackFrameInfo::set_method_and_bci(stackFrame(), method, bci); |
272 java_lang_StackFrameInfo::set_method_and_bci(stackFrame(), method, bci()); |
262 } |
273 } |
263 |
274 |
264 // Fill LiveStackFrameInfo with locals, monitors, and expressions |
275 // Fill LiveStackFrameInfo with locals, monitors, and expressions |
265 void StackWalk::fill_live_stackframe(Handle stackFrame, const methodHandle& method, |
276 void LiveFrameStream::fill_live_stackframe(Handle stackFrame, |
266 int bci, javaVFrame* jvf, TRAPS) { |
277 const methodHandle& method, TRAPS) { |
267 fill_stackframe(stackFrame, method, bci); |
278 fill_stackframe(stackFrame, method); |
268 if (jvf != NULL) { |
279 if (_jvf != NULL) { |
269 StackValueCollection* locals = jvf->locals(); |
280 StackValueCollection* locals = _jvf->locals(); |
270 StackValueCollection* expressions = jvf->expressions(); |
281 StackValueCollection* expressions = _jvf->expressions(); |
271 GrowableArray<MonitorInfo*>* monitors = jvf->monitors(); |
282 GrowableArray<MonitorInfo*>* monitors = _jvf->monitors(); |
272 |
283 |
273 if (!locals->is_empty()) { |
284 if (!locals->is_empty()) { |
274 objArrayHandle locals_h = values_to_object_array(locals, CHECK); |
285 objArrayHandle locals_h = values_to_object_array(locals, CHECK); |
275 java_lang_LiveStackFrameInfo::set_locals(stackFrame(), locals_h()); |
286 java_lang_LiveStackFrameInfo::set_locals(stackFrame(), locals_h()); |
276 } |
287 } |
313 |
324 |
314 if (frames_array.is_null()) { |
325 if (frames_array.is_null()) { |
315 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), "frames_array is NULL", NULL); |
326 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), "frames_array is NULL", NULL); |
316 } |
327 } |
317 |
328 |
318 Klass* stackWalker_klass = SystemDictionary::StackWalker_klass(); |
329 // Setup traversal onto my stack. |
319 Klass* abstractStackWalker_klass = SystemDictionary::AbstractStackWalker_klass(); |
330 if (live_frame_info(mode)) { |
320 |
331 assert (use_frames_array(mode), "Bad mode for get live frame"); |
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332 RegisterMap regMap(jt, true); |
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333 LiveFrameStream stream(jt, ®Map); |
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334 return fetchFirstBatch(stream, stackStream, mode, skip_frames, frame_count, start_index, frames_array, CHECK_NULL); |
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335 } else { |
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336 JavaFrameStream stream(jt, mode); |
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337 return fetchFirstBatch(stream, stackStream, mode, skip_frames, frame_count, start_index, frames_array, CHECK_NULL); |
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338 } |
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339 } |
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340 |
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341 oop StackWalk::fetchFirstBatch(BaseFrameStream& stream, Handle stackStream, |
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342 jlong mode, int skip_frames, int frame_count, |
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343 int start_index, objArrayHandle frames_array, TRAPS) { |
321 methodHandle m_doStackWalk(THREAD, Universe::do_stack_walk_method()); |
344 methodHandle m_doStackWalk(THREAD, Universe::do_stack_walk_method()); |
322 |
345 |
323 // Setup traversal onto my stack. |
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324 RegisterMap regMap(jt, true); |
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325 JavaFrameStream stream(jt, ®Map); |
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326 { |
346 { |
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347 Klass* stackWalker_klass = SystemDictionary::StackWalker_klass(); |
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348 Klass* abstractStackWalker_klass = SystemDictionary::AbstractStackWalker_klass(); |
327 while (!stream.at_end()) { |
349 while (!stream.at_end()) { |
328 InstanceKlass* ik = stream.method()->method_holder(); |
350 InstanceKlass* ik = stream.method()->method_holder(); |
329 if (ik != stackWalker_klass && |
351 if (ik != stackWalker_klass && |
330 ik != abstractStackWalker_klass && ik->super() != abstractStackWalker_klass) { |
352 ik != abstractStackWalker_klass && ik->super() != abstractStackWalker_klass) { |
331 break; |
353 break; |
339 |
361 |
340 // stack frame has been traversed individually and resume stack walk |
362 // stack frame has been traversed individually and resume stack walk |
341 // from the stack frame at depth == skip_frames. |
363 // from the stack frame at depth == skip_frames. |
342 for (int n=0; n < skip_frames && !stream.at_end(); stream.next(), n++) { |
364 for (int n=0; n < skip_frames && !stream.at_end(); stream.next(), n++) { |
343 if (TraceStackWalk) { |
365 if (TraceStackWalk) { |
344 tty->print(" skip "); stream.method()->print_short_name(); |
366 tty->print(" skip "); stream.method()->print_short_name(); tty->cr(); |
345 tty->print_cr(" frame id: " PTR_FORMAT " pc: " PTR_FORMAT, |
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346 p2i(stream.java_frame()->fr().id()), |
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347 p2i(stream.java_frame()->fr().pc())); |
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348 } |
367 } |
349 } |
368 } |
350 } |
369 } |
351 |
370 |
352 int end_index = start_index; |
371 int end_index = start_index; |
400 // start_index Start index to the user-supplied buffers. |
419 // start_index Start index to the user-supplied buffers. |
401 // frames_array Buffer to store StackFrame in, starting at start_index. |
420 // frames_array Buffer to store StackFrame in, starting at start_index. |
402 // |
421 // |
403 // Returns the end index of frame filled in the buffer. |
422 // Returns the end index of frame filled in the buffer. |
404 // |
423 // |
405 jint StackWalk::moreFrames(Handle stackStream, jlong mode, jlong magic, |
424 jint StackWalk::fetchNextBatch(Handle stackStream, jlong mode, jlong magic, |
406 int frame_count, int start_index, |
425 int frame_count, int start_index, |
407 objArrayHandle frames_array, |
426 objArrayHandle frames_array, |
408 TRAPS) |
427 TRAPS) |
409 { |
428 { |
410 JavaThread* jt = (JavaThread*)THREAD; |
429 JavaThread* jt = (JavaThread*)THREAD; |
411 JavaFrameStream* existing_stream = JavaFrameStream::from_current(jt, magic, frames_array); |
430 BaseFrameStream* existing_stream = BaseFrameStream::from_current(jt, magic, frames_array); |
412 if (existing_stream == NULL) { |
431 if (existing_stream == NULL) { |
413 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: corrupted buffers", 0L); |
432 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: corrupted buffers", 0L); |
414 } |
433 } |
415 |
434 |
416 if (frames_array.is_null()) { |
435 if (frames_array.is_null()) { |
417 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), "frames_array is NULL", 0L); |
436 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), "frames_array is NULL", 0L); |
418 } |
437 } |
419 |
438 |
420 if (TraceStackWalk) { |
439 if (TraceStackWalk) { |
421 tty->print_cr("StackWalk::moreFrames frame_count %d existing_stream " PTR_FORMAT " start %d frames %d", |
440 tty->print_cr("StackWalk::fetchNextBatch frame_count %d existing_stream " PTR_FORMAT " start %d frames %d", |
422 frame_count, p2i(existing_stream), start_index, frames_array->length()); |
441 frame_count, p2i(existing_stream), start_index, frames_array->length()); |
423 } |
442 } |
424 int end_index = start_index; |
443 int end_index = start_index; |
425 if (frame_count <= 0) { |
444 if (frame_count <= 0) { |
426 return end_index; // No operation. |
445 return end_index; // No operation. |
427 } |
446 } |
428 |
447 |
429 int count = frame_count + start_index; |
448 int count = frame_count + start_index; |
430 assert (frames_array->length() >= count, "not enough space in buffers"); |
449 assert (frames_array->length() >= count, "not enough space in buffers"); |
431 |
450 |
432 JavaFrameStream& stream = (*existing_stream); |
451 BaseFrameStream& stream = (*existing_stream); |
433 if (!stream.at_end()) { |
452 if (!stream.at_end()) { |
434 stream.next(); // advance past the last frame decoded in previous batch |
453 stream.next(); // advance past the last frame decoded in previous batch |
435 if (!stream.at_end()) { |
454 if (!stream.at_end()) { |
436 int n = fill_in_frames(mode, stream, frame_count, start_index, |
455 int n = fill_in_frames(mode, stream, frame_count, start_index, |
437 frames_array, end_index, CHECK_0); |
456 frames_array, end_index, CHECK_0); |