Mon, 04 Apr 2011 03:02:00 -0700
7032458: Zero and Shark fixes
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>
1 /*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2008, 2009 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 */
26 #include "precompiled.hpp"
27 #include "ci/ciMethod.hpp"
28 #include "code/debugInfoRec.hpp"
29 #include "shark/llvmValue.hpp"
30 #include "shark/sharkBuilder.hpp"
31 #include "shark/sharkCacheDecache.hpp"
32 #include "shark/sharkFunction.hpp"
33 #include "shark/sharkState.hpp"
35 using namespace llvm;
37 void SharkDecacher::start_frame() {
38 // Start recording the debug information
39 _pc_offset = code_buffer()->create_unique_offset();
40 _oopmap = new OopMap(
41 oopmap_slot_munge(stack()->oopmap_frame_size()),
42 oopmap_slot_munge(arg_size()));
43 debug_info()->add_safepoint(pc_offset(), oopmap());
44 }
46 void SharkDecacher::start_stack(int stack_depth) {
47 // Create the array we'll record our stack slots in
48 _exparray = new GrowableArray<ScopeValue*>(stack_depth);
50 // Set the stack pointer
51 stack()->CreateStoreStackPointer(
52 builder()->CreatePtrToInt(
53 stack()->slot_addr(
54 stack()->stack_slots_offset() + max_stack() - stack_depth),
55 SharkType::intptr_type()));
56 }
58 void SharkDecacher::process_stack_slot(int index,
59 SharkValue** addr,
60 int offset) {
61 SharkValue *value = *addr;
63 // Write the value to the frame if necessary
64 if (stack_slot_needs_write(index, value)) {
65 write_value_to_frame(
66 SharkType::to_stackType(value->basic_type()),
67 value->generic_value(),
68 adjusted_offset(value, offset));
69 }
71 // Record the value in the oopmap if necessary
72 if (stack_slot_needs_oopmap(index, value)) {
73 oopmap()->set_oop(slot2reg(offset));
74 }
76 // Record the value in the debuginfo if necessary
77 if (stack_slot_needs_debuginfo(index, value)) {
78 exparray()->append(slot2lv(offset, stack_location_type(index, addr)));
79 }
80 }
82 void SharkDecacher::start_monitors(int num_monitors) {
83 // Create the array we'll record our monitors in
84 _monarray = new GrowableArray<MonitorValue*>(num_monitors);
85 }
87 void SharkDecacher::process_monitor(int index, int box_offset, int obj_offset) {
88 oopmap()->set_oop(slot2reg(obj_offset));
90 monarray()->append(new MonitorValue(
91 slot2lv (obj_offset, Location::oop),
92 slot2loc(box_offset, Location::normal)));
93 }
95 void SharkDecacher::process_oop_tmp_slot(Value** value, int offset) {
96 // Decache the temporary oop slot
97 if (*value) {
98 write_value_to_frame(
99 SharkType::oop_type(),
100 *value,
101 offset);
103 oopmap()->set_oop(slot2reg(offset));
104 }
105 }
107 void SharkDecacher::process_method_slot(Value** value, int offset) {
108 // Decache the method pointer
109 write_value_to_frame(
110 SharkType::methodOop_type(),
111 *value,
112 offset);
114 oopmap()->set_oop(slot2reg(offset));
115 }
117 void SharkDecacher::process_pc_slot(int offset) {
118 // Record the PC
119 builder()->CreateStore(
120 builder()->code_buffer_address(pc_offset()),
121 stack()->slot_addr(offset));
122 }
124 void SharkDecacher::start_locals() {
125 // Create the array we'll record our local variables in
126 _locarray = new GrowableArray<ScopeValue*>(max_locals());}
128 void SharkDecacher::process_local_slot(int index,
129 SharkValue** addr,
130 int offset) {
131 SharkValue *value = *addr;
133 // Write the value to the frame if necessary
134 if (local_slot_needs_write(index, value)) {
135 write_value_to_frame(
136 SharkType::to_stackType(value->basic_type()),
137 value->generic_value(),
138 adjusted_offset(value, offset));
139 }
141 // Record the value in the oopmap if necessary
142 if (local_slot_needs_oopmap(index, value)) {
143 oopmap()->set_oop(slot2reg(offset));
144 }
146 // Record the value in the debuginfo if necessary
147 if (local_slot_needs_debuginfo(index, value)) {
148 locarray()->append(slot2lv(offset, local_location_type(index, addr)));
149 }
150 }
152 void SharkDecacher::end_frame() {
153 // Record the scope
154 debug_info()->describe_scope(
155 pc_offset(),
156 target(),
157 bci(),
158 true,
159 false,
160 false,
161 debug_info()->create_scope_values(locarray()),
162 debug_info()->create_scope_values(exparray()),
163 debug_info()->create_monitor_values(monarray()));
165 // Finish recording the debug information
166 debug_info()->end_safepoint(pc_offset());
167 }
169 void SharkCacher::process_stack_slot(int index,
170 SharkValue** addr,
171 int offset) {
172 SharkValue *value = *addr;
174 // Read the value from the frame if necessary
175 if (stack_slot_needs_read(index, value)) {
176 *addr = SharkValue::create_generic(
177 value->type(),
178 read_value_from_frame(
179 SharkType::to_stackType(value->basic_type()),
180 adjusted_offset(value, offset)),
181 value->zero_checked());
182 }
183 }
185 void SharkOSREntryCacher::process_monitor(int index,
186 int box_offset,
187 int obj_offset) {
188 // Copy the monitor from the OSR buffer to the frame
189 int src_offset = max_locals() + index * 2;
190 builder()->CreateStore(
191 builder()->CreateLoad(
192 CreateAddressOfOSRBufEntry(src_offset, SharkType::intptr_type())),
193 stack()->slot_addr(box_offset, SharkType::intptr_type()));
194 builder()->CreateStore(
195 builder()->CreateLoad(
196 CreateAddressOfOSRBufEntry(src_offset + 1, SharkType::oop_type())),
197 stack()->slot_addr(obj_offset, SharkType::oop_type()));
198 }
200 void SharkCacher::process_oop_tmp_slot(Value** value, int offset) {
201 // Cache the temporary oop
202 if (*value)
203 *value = read_value_from_frame(SharkType::oop_type(), offset);
204 }
206 void SharkCacher::process_method_slot(Value** value, int offset) {
207 // Cache the method pointer
208 *value = read_value_from_frame(SharkType::methodOop_type(), offset);
209 }
211 void SharkFunctionEntryCacher::process_method_slot(Value** value, int offset) {
212 // "Cache" the method pointer
213 *value = method();
214 }
216 void SharkCacher::process_local_slot(int index,
217 SharkValue** addr,
218 int offset) {
219 SharkValue *value = *addr;
221 // Read the value from the frame if necessary
222 if (local_slot_needs_read(index, value)) {
223 *addr = SharkValue::create_generic(
224 value->type(),
225 read_value_from_frame(
226 SharkType::to_stackType(value->basic_type()),
227 adjusted_offset(value, offset)),
228 value->zero_checked());
229 }
230 }
232 Value* SharkOSREntryCacher::CreateAddressOfOSRBufEntry(int offset,
233 const Type* type) {
234 Value *result = builder()->CreateStructGEP(osr_buf(), offset);
235 if (type != SharkType::intptr_type())
236 result = builder()->CreateBitCast(result, PointerType::getUnqual(type));
237 return result;
238 }
240 void SharkOSREntryCacher::process_local_slot(int index,
241 SharkValue** addr,
242 int offset) {
243 SharkValue *value = *addr;
245 // Read the value from the OSR buffer if necessary
246 if (local_slot_needs_read(index, value)) {
247 *addr = SharkValue::create_generic(
248 value->type(),
249 builder()->CreateLoad(
250 CreateAddressOfOSRBufEntry(
251 adjusted_offset(value, max_locals() - 1 - index),
252 SharkType::to_stackType(value->basic_type()))),
253 value->zero_checked());
254 }
255 }
257 void SharkDecacher::write_value_to_frame(const Type* type,
258 Value* value,
259 int offset) {
260 builder()->CreateStore(value, stack()->slot_addr(offset, type));
261 }
263 Value* SharkCacher::read_value_from_frame(const Type* type, int offset) {
264 return builder()->CreateLoad(stack()->slot_addr(offset, type));
265 }