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