1 /*
2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2007, 2008, 2009, 2010, 2011 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "code/scopeDesc.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterRuntime.hpp"
30 #include "memory/resourceArea.hpp"
31 #include "oops/markOop.hpp"
32 #include "oops/method.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "runtime/frame.inline.hpp"
35 #include "runtime/handles.inline.hpp"
36 #include "runtime/javaCalls.hpp"
37 #include "runtime/monitorChunk.hpp"
38 #include "runtime/signature.hpp"
39 #include "runtime/stubCodeGenerator.hpp"
40 #include "runtime/stubRoutines.hpp"
41 #include "vmreg_zero.inline.hpp"
42 #ifdef COMPILER1
43 #include "c1/c1_Runtime1.hpp"
44 #include "runtime/vframeArray.hpp"
45 #endif
46
47 #ifdef ASSERT
48 void RegisterMap::check_location_valid() {
49 ShouldNotCallThis();
50 }
51 #endif
52
53 bool frame::is_interpreted_frame() const {
54 return zeroframe()->is_interpreter_frame();
55 }
56
57 bool frame::is_fake_stub_frame() const {
58 return zeroframe()->is_fake_stub_frame();
59 }
60
61 frame frame::sender_for_entry_frame(RegisterMap *map) const {
62 assert(zeroframe()->is_entry_frame(), "wrong type of frame");
63 assert(map != NULL, "map must be set");
64 assert(!entry_frame_is_first(), "next Java fp must be non zero");
65 assert(entry_frame_call_wrapper()->anchor()->last_Java_sp() == sender_sp(),
66 "sender should be next Java frame");
67 map->clear();
68 assert(map->include_argument_oops(), "should be set by clear");
69 return frame(zeroframe()->next(), sender_sp());
70 }
71
72 frame frame::sender_for_nonentry_frame(RegisterMap *map) const {
73 assert(zeroframe()->is_interpreter_frame() ||
74 zeroframe()->is_fake_stub_frame(), "wrong type of frame");
75 return frame(zeroframe()->next(), sender_sp());
76 }
77
78 frame frame::sender(RegisterMap* map) const {
79 // Default is not to follow arguments; the various
80 // sender_for_xxx methods update this accordingly.
81 map->set_include_argument_oops(false);
82
83 if (is_entry_frame())
84 return sender_for_entry_frame(map);
85 else
86 return sender_for_nonentry_frame(map);
87 }
88
89 #ifdef CC_INTERP
90 BasicObjectLock* frame::interpreter_frame_monitor_begin() const {
91 return get_interpreterState()->monitor_base();
92 }
93
94 BasicObjectLock* frame::interpreter_frame_monitor_end() const {
95 return (BasicObjectLock*) get_interpreterState()->stack_base();
96 }
97 #endif // CC_INTERP
98
99 void frame::patch_pc(Thread* thread, address pc) {
100
101 if (pc != NULL) {
102 _cb = CodeCache::find_blob(pc);
103 _pc = pc;
104 _deopt_state = is_deoptimized;
105
106 } else {
107 // We borrow this call to set the thread pointer in the interpreter
108 // state; the hook to set up deoptimized frames isn't supplied it.
109 assert(pc == NULL, "should be");
110 get_interpreterState()->set_thread((JavaThread *) thread);
111 }
112 }
113
114 bool frame::safe_for_sender(JavaThread *thread) {
115 ShouldNotCallThis();
116 return false;
117 }
118
119 bool frame::is_interpreted_frame_valid(JavaThread *thread) const {
120 ShouldNotCallThis();
121 return false;
122 }
123
124 BasicType frame::interpreter_frame_result(oop* oop_result,
125 jvalue* value_result) {
126 assert(is_interpreted_frame(), "interpreted frame expected");
127 Method* method = interpreter_frame_method();
128 BasicType type = method->result_type();
129 intptr_t* tos_addr = (intptr_t *) interpreter_frame_tos_address();
130 oop obj;
131
132 switch (type) {
133 case T_VOID:
134 break;
135 case T_BOOLEAN:
136 value_result->z = *(jboolean *) tos_addr;
137 break;
138 case T_BYTE:
139 value_result->b = *(jbyte *) tos_addr;
140 break;
141 case T_CHAR:
142 value_result->c = *(jchar *) tos_addr;
143 break;
144 case T_SHORT:
145 value_result->s = *(jshort *) tos_addr;
146 break;
147 case T_INT:
148 value_result->i = *(jint *) tos_addr;
149 break;
150 case T_LONG:
151 value_result->j = *(jlong *) tos_addr;
152 break;
153 case T_FLOAT:
154 value_result->f = *(jfloat *) tos_addr;
155 break;
156 case T_DOUBLE:
157 value_result->d = *(jdouble *) tos_addr;
158 break;
159
160 case T_OBJECT:
161 case T_ARRAY:
162 if (method->is_native()) {
163 obj = get_interpreterState()->oop_temp();
164 }
165 else {
166 oop* obj_p = (oop *) tos_addr;
167 obj = (obj_p == NULL) ? (oop) NULL : *obj_p;
168 }
169 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
170 *oop_result = obj;
171 break;
172
173 default:
174 ShouldNotReachHere();
175 }
176
177 return type;
178 }
179
180 int frame::frame_size(RegisterMap* map) const {
181 #ifdef PRODUCT
182 ShouldNotCallThis();
183 #endif // PRODUCT
184 return 0; // make javaVFrame::print_value work
185 }
186
187 intptr_t* frame::interpreter_frame_tos_at(jint offset) const {
188 int index = (Interpreter::expr_offset_in_bytes(offset) / wordSize);
189 return &interpreter_frame_tos_address()[index];
190 }
191
192 void frame::zero_print_on_error(int frame_index,
193 outputStream* st,
194 char* buf,
195 int buflen) const {
196 // Divide the buffer between the field and the value
197 buflen >>= 1;
198 char *fieldbuf = buf;
199 char *valuebuf = buf + buflen;
200
201 // Print each word of the frame
202 for (intptr_t *addr = sp(); addr <= fp(); addr++) {
203 int offset = fp() - addr;
204
205 // Fill in default values, then try and improve them
206 snprintf(fieldbuf, buflen, "word[%d]", offset);
207 snprintf(valuebuf, buflen, PTR_FORMAT, *addr);
208 zeroframe()->identify_word(frame_index, offset, fieldbuf, valuebuf, buflen);
209 fieldbuf[buflen - 1] = '\0';
210 valuebuf[buflen - 1] = '\0';
211
212 // Print the result
213 st->print_cr(" " PTR_FORMAT ": %-21s = %s", p2i(addr), fieldbuf, valuebuf);
214 }
215 }
216
217 void ZeroFrame::identify_word(int frame_index,
218 int offset,
219 char* fieldbuf,
220 char* valuebuf,
221 int buflen) const {
222 switch (offset) {
223 case next_frame_off:
224 strncpy(fieldbuf, "next_frame", buflen);
225 break;
226
227 case frame_type_off:
228 strncpy(fieldbuf, "frame_type", buflen);
229 if (is_entry_frame())
230 strncpy(valuebuf, "ENTRY_FRAME", buflen);
231 else if (is_interpreter_frame())
232 strncpy(valuebuf, "INTERPRETER_FRAME", buflen);
233 else if (is_fake_stub_frame())
234 strncpy(valuebuf, "FAKE_STUB_FRAME", buflen);
235 break;
236
237 default:
238 if (is_entry_frame()) {
239 as_entry_frame()->identify_word(
240 frame_index, offset, fieldbuf, valuebuf, buflen);
241 }
242 else if (is_interpreter_frame()) {
243 as_interpreter_frame()->identify_word(
244 frame_index, offset, fieldbuf, valuebuf, buflen);
245 }
246 else if (is_fake_stub_frame()) {
247 as_fake_stub_frame()->identify_word(
248 frame_index, offset, fieldbuf, valuebuf, buflen);
249 }
250 }
251 }
252
253 void EntryFrame::identify_word(int frame_index,
254 int offset,
255 char* fieldbuf,
256 char* valuebuf,
257 int buflen) const {
258 switch (offset) {
259 case call_wrapper_off:
260 strncpy(fieldbuf, "call_wrapper", buflen);
261 break;
262
263 default:
264 snprintf(fieldbuf, buflen, "local[%d]", offset - 3);
265 }
266 }
267
268 void InterpreterFrame::identify_word(int frame_index,
269 int offset,
270 char* fieldbuf,
271 char* valuebuf,
272 int buflen) const {
273 interpreterState istate = interpreter_state();
274 bool is_valid = istate->self_link() == istate;
275 intptr_t *addr = addr_of_word(offset);
276
277 // Fixed part
278 if (addr >= (intptr_t *) istate) {
279 const char *field = istate->name_of_field_at_address((address) addr);
280 if (field) {
281 if (is_valid && !strcmp(field, "_method")) {
282 istate->method()->name_and_sig_as_C_string(valuebuf, buflen);
283 }
284 else if (is_valid && !strcmp(field, "_bcp") && istate->bcp()) {
285 snprintf(valuebuf, buflen, PTR_FORMAT " (bci %d)",
286 (intptr_t) istate->bcp(),
287 istate->method()->bci_from(istate->bcp()));
288 }
289 snprintf(fieldbuf, buflen, "%sistate->%s",
290 field[strlen(field) - 1] == ')' ? "(": "", field);
291 }
292 else if (addr == (intptr_t *) istate) {
293 strncpy(fieldbuf, "(vtable for istate)", buflen);
294 }
295 return;
296 }
297
298 // Variable part
299 if (!is_valid)
300 return;
301
302 // JNI stuff
303 if (istate->method()->is_native() && addr < istate->stack_base()) {
304 address hA = istate->method()->signature_handler();
305 if (hA != NULL) {
306 if (hA != (address) InterpreterRuntime::slow_signature_handler) {
307 InterpreterRuntime::SignatureHandler *handler =
308 InterpreterRuntime::SignatureHandler::from_handlerAddr(hA);
309
310 intptr_t *params = istate->stack_base() - handler->argument_count();
311 if (addr >= params) {
312 int param = addr - params;
313 const char *desc = "";
314 if (param == 0)
315 desc = " (JNIEnv)";
316 else if (param == 1) {
317 if (istate->method()->is_static())
318 desc = " (mirror)";
319 else
320 desc = " (this)";
321 }
322 snprintf(fieldbuf, buflen, "parameter[%d]%s", param, desc);
323 return;
324 }
325
326 for (int i = 0; i < handler->argument_count(); i++) {
327 if (params[i] == (intptr_t) addr) {
328 snprintf(fieldbuf, buflen, "unboxed parameter[%d]", i);
329 return;
330 }
331 }
332 }
333 }
334 return;
335 }
336
337 // Monitors and stack
338 identify_vp_word(frame_index, addr,
339 (intptr_t *) istate->monitor_base(),
340 istate->stack_base(),
341 fieldbuf, buflen);
342 }
343
344 void ZeroFrame::identify_vp_word(int frame_index,
345 intptr_t* addr,
346 intptr_t* monitor_base,
347 intptr_t* stack_base,
348 char* fieldbuf,
349 int buflen) const {
350 // Monitors
351 if (addr >= stack_base && addr < monitor_base) {
352 int monitor_size = frame::interpreter_frame_monitor_size();
353 int last_index = (monitor_base - stack_base) / monitor_size - 1;
354 int index = last_index - (addr - stack_base) / monitor_size;
355 intptr_t monitor = (intptr_t) (
356 (BasicObjectLock *) monitor_base - 1 - index);
357 intptr_t offset = (intptr_t) addr - monitor;
358
359 if (offset == BasicObjectLock::obj_offset_in_bytes())
360 snprintf(fieldbuf, buflen, "monitor[%d]->_obj", index);
361 else if (offset == BasicObjectLock::lock_offset_in_bytes())
362 snprintf(fieldbuf, buflen, "monitor[%d]->_lock", index);
363
364 return;
365 }
366
367 // Expression stack
368 if (addr < stack_base) {
369 snprintf(fieldbuf, buflen, "%s[%d]",
370 frame_index == 0 ? "stack_word" : "local",
371 (int) (stack_base - addr - 1));
372 return;
373 }
374 }
375
376 #ifndef PRODUCT
377
378 void frame::describe_pd(FrameValues& values, int frame_no) {
379
380 }
381
382 #endif
383
384 intptr_t *frame::initial_deoptimization_info() {
385 // unused... but returns fp() to minimize changes introduced by 7087445
386 return fp();
387 }
388
389 #ifndef PRODUCT
390 // This is a generic constructor which is only used by pns() in debug.cpp.
391 frame::frame(void* sp, void* fp, void* pc) {
392 Unimplemented();
393 }
394
395 void frame::pd_ps() {}
396 #endif