90 // start_index Start index to the user-supplied buffers.
91 // frames_array Buffer to store Class or StackFrame in, starting at start_index.
92 // frames array is a Class<?>[] array when only getting caller
93 // reference, and a StackFrameInfo[] array (or derivative)
94 // otherwise. It should never be null.
95 // end_index End index to the user-supplied buffers with unpacked frames.
96 //
97 // Returns the number of frames whose information was transferred into the buffers.
98 //
99 int StackWalk::fill_in_frames(jlong mode, JavaFrameStream& stream,
100 int max_nframes, int start_index,
101 objArrayHandle frames_array,
102 int& end_index, TRAPS) {
103 if (TraceStackWalk) {
104 tty->print_cr("fill_in_frames limit=%d start=%d frames length=%d",
105 max_nframes, start_index, frames_array->length());
106 }
107 assert(max_nframes > 0, "invalid max_nframes");
108 assert(start_index + max_nframes <= frames_array->length(), "oob");
109
110 int frames_decoded = 0;
111 for (; !stream.at_end(); stream.next()) {
112 Method* method = stream.method();
113 int bci = stream.bci();
114
115 if (method == NULL) continue;
116 if (!ShowHiddenFrames && StackWalk::skip_hidden_frames(mode)) {
117 if (method->is_hidden()) {
118 if (TraceStackWalk) {
119 tty->print(" hidden method: "); method->print_short_name();
120 tty->print("\n");
121 }
122 continue;
123 }
124 }
125
126 int index = end_index++;
127 if (TraceStackWalk) {
128 tty->print(" %d: frame method: ", index); method->print_short_name();
129 tty->print_cr(" bci=%d", bci);
130 }
131
132 // fill in StackFrameInfo and initialize MemberName
133 if (live_frame_info(mode)) {
134 assert (use_frames_array(mode), "Bad mode for get live frame");
135 Handle stackFrame(frames_array->obj_at(index));
136 fill_live_stackframe(stackFrame, method, bci, stream.java_frame(), CHECK_0);
137 } else if (need_method_info(mode)) {
138 assert (use_frames_array(mode), "Bad mode for get stack frame");
139 Handle stackFrame(frames_array->obj_at(index));
140 fill_stackframe(stackFrame, method, bci);
141 } else {
142 assert (use_frames_array(mode) == false, "Bad mode for get caller class");
143 frames_array->obj_at_put(index, method->method_holder()->java_mirror());
144 }
145 if (++frames_decoded >= max_nframes) break;
146 }
147 return frames_decoded;
148 }
149
150 static oop create_primitive_value_instance(StackValueCollection* values, int i, TRAPS) {
151 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::java_lang_LiveStackFrameInfo(), CHECK_NULL);
152 instanceKlassHandle ik (THREAD, k);
153
154 JavaValue result(T_OBJECT);
155 JavaCallArguments args;
156 Symbol* signature = NULL;
157
158 // ## TODO: type is only available in LocalVariable table, if present.
159 // ## StackValue type is T_INT or T_OBJECT.
160 switch (values->at(i)->type()) {
161 case T_INT:
162 args.push_int(values->int_at(i));
163 signature = vmSymbols::asPrimitive_int_signature();
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90 // start_index Start index to the user-supplied buffers.
91 // frames_array Buffer to store Class or StackFrame in, starting at start_index.
92 // frames array is a Class<?>[] array when only getting caller
93 // reference, and a StackFrameInfo[] array (or derivative)
94 // otherwise. It should never be null.
95 // end_index End index to the user-supplied buffers with unpacked frames.
96 //
97 // Returns the number of frames whose information was transferred into the buffers.
98 //
99 int StackWalk::fill_in_frames(jlong mode, JavaFrameStream& stream,
100 int max_nframes, int start_index,
101 objArrayHandle frames_array,
102 int& end_index, TRAPS) {
103 if (TraceStackWalk) {
104 tty->print_cr("fill_in_frames limit=%d start=%d frames length=%d",
105 max_nframes, start_index, frames_array->length());
106 }
107 assert(max_nframes > 0, "invalid max_nframes");
108 assert(start_index + max_nframes <= frames_array->length(), "oob");
109
110 Method* caller_sensitive_method = NULL;
111
112 int frames_decoded = 0;
113 for (; !stream.at_end(); stream.next()) {
114 Method* method = stream.method();
115 int bci = stream.bci();
116
117 if (method == NULL) continue;
118
119 if (caller_sensitive_method != NULL) {
120 // JVM_GetCallerClass may return a hidden method
121 // StackWalker::getCallerClass should return the same caller as JVM_GetCallerClass
122 // even the jdk implementation does not use it for performance reason
123 if (method->is_ignored_by_security_stack_walk()) continue;
124 } else {
125 // filter hidden frames
126 if (!ShowHiddenFrames && StackWalk::skip_hidden_frames(mode)) {
127 if (method->is_hidden()) {
128 if (TraceStackWalk) {
129 tty->print(" hidden method: "); method->print_short_name();
130 tty->print("\n");
131 }
132 continue;
133 }
134 }
135 }
136
137 int index = end_index++;
138 if (TraceStackWalk) {
139 tty->print(" %d: frame method: ", index); method->print_short_name();
140 tty->print_cr(" bci=%d", bci);
141 }
142
143 // fill in StackFrameInfo and initialize MemberName
144 if (live_frame_info(mode)) {
145 assert (use_frames_array(mode), "Bad mode for get live frame");
146 Handle stackFrame(frames_array->obj_at(index));
147 fill_live_stackframe(stackFrame, method, bci, stream.java_frame(), CHECK_0);
148 } else if (need_method_info(mode)) {
149 assert (use_frames_array(mode), "Bad mode for get stack frame");
150 Handle stackFrame(frames_array->obj_at(index));
151 fill_stackframe(stackFrame, method, bci);
152 } else {
153 assert (use_frames_array(mode) == false, "Bad mode for get caller class");
154 frames_array->obj_at_put(index, method->method_holder()->java_mirror());
155 if (StackWalk::get_caller_class(mode) &&
156 caller_sensitive_method == NULL && method->caller_sensitive()) {
157 caller_sensitive_method = method;
158 }
159 }
160 if (++frames_decoded >= max_nframes) break;
161 }
162 return frames_decoded;
163 }
164
165 static oop create_primitive_value_instance(StackValueCollection* values, int i, TRAPS) {
166 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::java_lang_LiveStackFrameInfo(), CHECK_NULL);
167 instanceKlassHandle ik (THREAD, k);
168
169 JavaValue result(T_OBJECT);
170 JavaCallArguments args;
171 Symbol* signature = NULL;
172
173 // ## TODO: type is only available in LocalVariable table, if present.
174 // ## StackValue type is T_INT or T_OBJECT.
175 switch (values->at(i)->type()) {
176 case T_INT:
177 args.push_int(values->int_at(i));
178 signature = vmSymbols::asPrimitive_int_signature();
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