1 /*
2 * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2017 SAP SE. All rights reserved.
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 "interpreter/interpreter.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "oops/markOop.hpp"
30 #include "oops/method.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "runtime/frame.inline.hpp"
33 #include "runtime/handles.inline.hpp"
34 #include "runtime/javaCalls.hpp"
35 #include "runtime/jniHandles.inline.hpp"
36 #include "runtime/monitorChunk.hpp"
37 #include "runtime/signature.hpp"
38 #include "runtime/stubCodeGenerator.hpp"
39 #include "runtime/stubRoutines.hpp"
40 #ifdef COMPILER1
41 #include "c1/c1_Runtime1.hpp"
42 #include "runtime/vframeArray.hpp"
43 #endif
44
45 #ifdef ASSERT
46 void RegisterMap::check_location_valid() {
47 }
48 #endif // ASSERT
49
50 bool frame::safe_for_sender(JavaThread *thread) {
51 bool safe = false;
52 address cursp = (address)sp();
53 address curfp = (address)fp();
54 if ((cursp != NULL && curfp != NULL &&
55 (cursp <= thread->stack_base() && cursp >= thread->stack_base() - thread->stack_size())) &&
56 (curfp <= thread->stack_base() && curfp >= thread->stack_base() - thread->stack_size())) {
57 safe = true;
58 }
59 return safe;
60 }
61
62 bool frame::is_interpreted_frame() const {
63 return Interpreter::contains(pc());
64 }
65
66 frame frame::sender_for_entry_frame(RegisterMap *map) const {
67 assert(map != NULL, "map must be set");
68 // Java frame called from C; skip all C frames and return top C
69 // frame of that chunk as the sender.
70 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();
71 assert(!entry_frame_is_first(), "next Java fp must be non zero");
72 assert(jfa->last_Java_sp() > _sp, "must be above this frame on stack");
73 map->clear();
74 assert(map->include_argument_oops(), "should be set by clear");
75
76 if (jfa->last_Java_pc() != NULL) {
77 frame fr(jfa->last_Java_sp(), jfa->last_Java_pc());
78 return fr;
79 }
80 // Last_java_pc is not set, if we come here from compiled code. The
81 // constructor retrieves the PC from the stack.
82 frame fr(jfa->last_Java_sp());
83 return fr;
84 }
85
86 frame frame::sender_for_interpreter_frame(RegisterMap *map) const {
87 // Pass callers initial_caller_sp as unextended_sp.
88 return frame(sender_sp(), sender_pc(), (intptr_t*)get_ijava_state()->sender_sp);
89 }
90
91 frame frame::sender_for_compiled_frame(RegisterMap *map) const {
92 assert(map != NULL, "map must be set");
93
94 // Frame owned by compiler.
95 address pc = *compiled_sender_pc_addr(_cb);
96 frame caller(compiled_sender_sp(_cb), pc);
97
98 // Now adjust the map.
99
100 // Get the rest.
101 if (map->update_map()) {
102 // Tell GC to use argument oopmaps for some runtime stubs that need it.
103 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread()));
104 if (_cb->oop_maps() != NULL) {
105 OopMapSet::update_register_map(this, map);
106 }
107 }
108
109 return caller;
110 }
111
112 intptr_t* frame::compiled_sender_sp(CodeBlob* cb) const {
113 return sender_sp();
114 }
115
116 address* frame::compiled_sender_pc_addr(CodeBlob* cb) const {
117 return sender_pc_addr();
118 }
119
120 frame frame::sender(RegisterMap* map) const {
121 // Default is we do have to follow them. The sender_for_xxx will
122 // update it accordingly.
123 map->set_include_argument_oops(false);
124
125 if (is_entry_frame()) return sender_for_entry_frame(map);
126 if (is_interpreted_frame()) return sender_for_interpreter_frame(map);
127 assert(_cb == CodeCache::find_blob(pc()),"Must be the same");
128
129 if (_cb != NULL) {
130 return sender_for_compiled_frame(map);
131 }
132 // Must be native-compiled frame, i.e. the marshaling code for native
133 // methods that exists in the core system.
134 return frame(sender_sp(), sender_pc());
135 }
136
137 void frame::patch_pc(Thread* thread, address pc) {
138 if (TracePcPatching) {
139 tty->print_cr("patch_pc at address " PTR_FORMAT " [" PTR_FORMAT " -> " PTR_FORMAT "]",
140 p2i(&((address*) _sp)[-1]), p2i(((address*) _sp)[-1]), p2i(pc));
141 }
142 own_abi()->lr = (uint64_t)pc;
143 _cb = CodeCache::find_blob(pc);
144 if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {
145 address orig = (((nmethod*)_cb)->get_original_pc(this));
146 assert(orig == _pc, "expected original to be stored before patching");
147 _deopt_state = is_deoptimized;
148 // Leave _pc as is.
149 } else {
150 _deopt_state = not_deoptimized;
151 _pc = pc;
152 }
153 }
154
155 bool frame::is_interpreted_frame_valid(JavaThread* thread) const {
156 // Is there anything to do?
157 assert(is_interpreted_frame(), "Not an interpreted frame");
158 return true;
159 }
160
161 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) {
162 assert(is_interpreted_frame(), "interpreted frame expected");
163 Method* method = interpreter_frame_method();
164 BasicType type = method->result_type();
165
166 if (method->is_native()) {
167 // Prior to calling into the runtime to notify the method exit the possible
168 // result value is saved into the interpreter frame.
169 address lresult = (address)&(get_ijava_state()->lresult);
170 address fresult = (address)&(get_ijava_state()->fresult);
171
172 switch (method->result_type()) {
173 case T_OBJECT:
174 case T_ARRAY: {
175 *oop_result = JNIHandles::resolve(*(jobject*)lresult);
176 break;
177 }
178 // We use std/stfd to store the values.
179 case T_BOOLEAN : value_result->z = (jboolean) *(unsigned long*)lresult; break;
180 case T_INT : value_result->i = (jint) *(long*)lresult; break;
181 case T_CHAR : value_result->c = (jchar) *(unsigned long*)lresult; break;
182 case T_SHORT : value_result->s = (jshort) *(long*)lresult; break;
183 case T_BYTE : value_result->z = (jbyte) *(long*)lresult; break;
184 case T_LONG : value_result->j = (jlong) *(long*)lresult; break;
185 case T_FLOAT : value_result->f = (jfloat) *(double*)fresult; break;
186 case T_DOUBLE : value_result->d = (jdouble) *(double*)fresult; break;
187 case T_VOID : /* Nothing to do */ break;
188 default : ShouldNotReachHere();
189 }
190 } else {
191 intptr_t* tos_addr = interpreter_frame_tos_address();
192 switch (method->result_type()) {
193 case T_OBJECT:
194 case T_ARRAY: {
195 oop obj = *(oop*)tos_addr;
196 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
197 *oop_result = obj;
198 }
199 case T_BOOLEAN : value_result->z = (jboolean) *(jint*)tos_addr; break;
200 case T_BYTE : value_result->b = (jbyte) *(jint*)tos_addr; break;
201 case T_CHAR : value_result->c = (jchar) *(jint*)tos_addr; break;
202 case T_SHORT : value_result->s = (jshort) *(jint*)tos_addr; break;
203 case T_INT : value_result->i = *(jint*)tos_addr; break;
204 case T_LONG : value_result->j = *(jlong*)tos_addr; break;
205 case T_FLOAT : value_result->f = *(jfloat*)tos_addr; break;
206 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break;
207 case T_VOID : /* Nothing to do */ break;
208 default : ShouldNotReachHere();
209 }
210 }
211 return type;
212 }
213
214 #ifndef PRODUCT
215
216 void frame::describe_pd(FrameValues& values, int frame_no) {
217 if (is_interpreted_frame()) {
218 #define DESCRIBE_ADDRESS(name) \
219 values.describe(frame_no, (intptr_t*)&(get_ijava_state()->name), #name);
220
221 DESCRIBE_ADDRESS(method);
222 DESCRIBE_ADDRESS(mirror);
223 DESCRIBE_ADDRESS(locals);
224 DESCRIBE_ADDRESS(monitors);
225 DESCRIBE_ADDRESS(cpoolCache);
226 DESCRIBE_ADDRESS(bcp);
227 DESCRIBE_ADDRESS(esp);
228 DESCRIBE_ADDRESS(mdx);
229 DESCRIBE_ADDRESS(top_frame_sp);
230 DESCRIBE_ADDRESS(sender_sp);
231 DESCRIBE_ADDRESS(oop_tmp);
232 DESCRIBE_ADDRESS(lresult);
233 DESCRIBE_ADDRESS(fresult);
234 }
235 }
236 #endif
237
238 intptr_t *frame::initial_deoptimization_info() {
239 // unused... but returns fp() to minimize changes introduced by 7087445
240 return fp();
241 }
242
243 #ifndef PRODUCT
244 // This is a generic constructor which is only used by pns() in debug.cpp.
245 frame::frame(void* sp, void* fp, void* pc) : _sp((intptr_t*)sp), _unextended_sp((intptr_t*)sp) {
246 find_codeblob_and_set_pc_and_deopt_state((address)pc); // also sets _fp and adjusts _unextended_sp
247 }
248
249 void frame::pd_ps() {}
250 #endif