43972
|
1 |
/*
|
58299
|
2 |
* Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
|
43972
|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
4 |
*
|
|
5 |
* This code is free software; you can redistribute it and/or modify it
|
|
6 |
* under the terms of the GNU General Public License version 2 only, as
|
|
7 |
* published by the Free Software Foundation.
|
|
8 |
*
|
|
9 |
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
10 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
11 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
12 |
* version 2 for more details (a copy is included in the LICENSE file that
|
|
13 |
* accompanied this code).
|
|
14 |
*
|
|
15 |
* You should have received a copy of the GNU General Public License version
|
|
16 |
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
17 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
18 |
*
|
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
20 |
* or visit www.oracle.com if you need additional information or have any
|
|
21 |
* questions.
|
|
22 |
*/
|
50858
|
23 |
|
|
24 |
|
43972
|
25 |
package org.graalvm.compiler.lir.framemap;
|
|
26 |
|
55509
|
27 |
import org.graalvm.compiler.core.common.LIRKind;
|
46344
|
28 |
import org.graalvm.compiler.core.common.NumUtil;
|
|
29 |
import org.graalvm.compiler.core.common.PermanentBailoutException;
|
43972
|
30 |
|
|
31 |
import jdk.vm.ci.code.Architecture;
|
|
32 |
import jdk.vm.ci.code.CallingConvention;
|
|
33 |
import jdk.vm.ci.code.CodeCacheProvider;
|
|
34 |
import jdk.vm.ci.code.RegisterConfig;
|
|
35 |
import jdk.vm.ci.code.StackSlot;
|
|
36 |
import jdk.vm.ci.code.TargetDescription;
|
|
37 |
import jdk.vm.ci.meta.ValueKind;
|
|
38 |
|
|
39 |
/**
|
|
40 |
* This class is used to build the stack frame layout for a compiled method. A {@link StackSlot} is
|
|
41 |
* used to index slots of the frame relative to the stack pointer. The frame size is only fixed
|
|
42 |
* after register allocation when all spill slots have been allocated. Both the outgoing argument
|
55509
|
43 |
* area and the spill area can grow until then. Therefore, outgoing arguments are indexed from the
|
43972
|
44 |
* stack pointer, while spill slots are indexed from the beginning of the frame (and the total frame
|
|
45 |
* size has to be added to get the actual offset from the stack pointer).
|
|
46 |
*/
|
|
47 |
public abstract class FrameMap {
|
|
48 |
|
|
49 |
private final TargetDescription target;
|
|
50 |
private final RegisterConfig registerConfig;
|
|
51 |
|
|
52 |
public interface ReferenceMapBuilderFactory {
|
|
53 |
|
|
54 |
ReferenceMapBuilder newReferenceMapBuilder(int totalFrameSize);
|
|
55 |
}
|
|
56 |
|
|
57 |
private final ReferenceMapBuilderFactory referenceMapFactory;
|
|
58 |
|
|
59 |
/**
|
|
60 |
* The final frame size, not including the size of the
|
|
61 |
* {@link Architecture#getReturnAddressSize() return address slot}. The value is only set after
|
|
62 |
* register allocation is complete, i.e., after all spill slots have been allocated.
|
|
63 |
*/
|
|
64 |
private int frameSize;
|
|
65 |
|
|
66 |
/**
|
|
67 |
* Initial size of the area occupied by spill slots and other stack-allocated memory blocks.
|
|
68 |
*/
|
|
69 |
protected int initialSpillSize;
|
|
70 |
|
|
71 |
/**
|
|
72 |
* Size of the area occupied by spill slots and other stack-allocated memory blocks.
|
|
73 |
*/
|
|
74 |
protected int spillSize;
|
|
75 |
|
|
76 |
/**
|
|
77 |
* Size of the area occupied by outgoing overflow arguments. This value is adjusted as calling
|
|
78 |
* conventions for outgoing calls are retrieved. On some platforms, there is a minimum outgoing
|
|
79 |
* size even if no overflow arguments are on the stack.
|
|
80 |
*/
|
|
81 |
protected int outgoingSize;
|
|
82 |
|
|
83 |
/**
|
|
84 |
* Determines if this frame has values on the stack for outgoing calls.
|
|
85 |
*/
|
|
86 |
protected boolean hasOutgoingStackArguments;
|
|
87 |
|
|
88 |
/**
|
|
89 |
* Records whether an offset to an incoming stack argument was ever returned by
|
|
90 |
* {@link #offsetForStackSlot(StackSlot)}.
|
|
91 |
*/
|
|
92 |
private boolean accessesCallerFrame;
|
|
93 |
|
|
94 |
/**
|
|
95 |
* Creates a new frame map for the specified method. The given registerConfig is optional, in
|
|
96 |
* case null is passed the default RegisterConfig from the CodeCacheProvider will be used.
|
|
97 |
*/
|
|
98 |
public FrameMap(CodeCacheProvider codeCache, RegisterConfig registerConfig, ReferenceMapBuilderFactory referenceMapFactory) {
|
|
99 |
this.target = codeCache.getTarget();
|
|
100 |
this.registerConfig = registerConfig == null ? codeCache.getRegisterConfig() : registerConfig;
|
|
101 |
this.frameSize = -1;
|
|
102 |
this.outgoingSize = codeCache.getMinimumOutgoingSize();
|
|
103 |
this.referenceMapFactory = referenceMapFactory;
|
|
104 |
}
|
|
105 |
|
|
106 |
public RegisterConfig getRegisterConfig() {
|
|
107 |
return registerConfig;
|
|
108 |
}
|
|
109 |
|
|
110 |
public TargetDescription getTarget() {
|
|
111 |
return target;
|
|
112 |
}
|
|
113 |
|
|
114 |
protected int returnAddressSize() {
|
|
115 |
return getTarget().arch.getReturnAddressSize();
|
|
116 |
}
|
|
117 |
|
|
118 |
/**
|
|
119 |
* Determines if an offset to an incoming stack argument was ever returned by
|
|
120 |
* {@link #offsetForStackSlot(StackSlot)}.
|
|
121 |
*/
|
|
122 |
public boolean accessesCallerFrame() {
|
|
123 |
return accessesCallerFrame;
|
|
124 |
}
|
|
125 |
|
|
126 |
/**
|
|
127 |
* Gets the frame size of the compiled frame, not including the size of the
|
|
128 |
* {@link Architecture#getReturnAddressSize() return address slot}.
|
|
129 |
*
|
|
130 |
* @return The size of the frame (in bytes).
|
|
131 |
*/
|
|
132 |
public int frameSize() {
|
|
133 |
assert frameSize != -1 : "frame size not computed yet";
|
|
134 |
return frameSize;
|
|
135 |
}
|
|
136 |
|
|
137 |
public int outgoingSize() {
|
|
138 |
return outgoingSize;
|
|
139 |
}
|
|
140 |
|
|
141 |
/**
|
|
142 |
* Determines if any space is used in the frame apart from the
|
|
143 |
* {@link Architecture#getReturnAddressSize() return address slot}.
|
|
144 |
*/
|
|
145 |
public boolean frameNeedsAllocating() {
|
|
146 |
int unalignedFrameSize = spillSize - returnAddressSize();
|
|
147 |
return hasOutgoingStackArguments || unalignedFrameSize != 0;
|
|
148 |
}
|
|
149 |
|
|
150 |
/**
|
|
151 |
* Gets the total frame size of the compiled frame, including the size of the
|
|
152 |
* {@link Architecture#getReturnAddressSize() return address slot}.
|
|
153 |
*
|
|
154 |
* @return The total size of the frame (in bytes).
|
|
155 |
*/
|
|
156 |
public abstract int totalFrameSize();
|
|
157 |
|
|
158 |
/**
|
|
159 |
* Gets the current size of this frame. This is the size that would be returned by
|
|
160 |
* {@link #frameSize()} if {@link #finish()} were called now.
|
|
161 |
*/
|
|
162 |
public abstract int currentFrameSize();
|
|
163 |
|
|
164 |
/**
|
|
165 |
* Aligns the given frame size to the stack alignment size and return the aligned size.
|
|
166 |
*
|
|
167 |
* @param size the initial frame size to be aligned
|
|
168 |
* @return the aligned frame size
|
|
169 |
*/
|
|
170 |
protected int alignFrameSize(int size) {
|
|
171 |
return NumUtil.roundUp(size, getTarget().stackAlignment);
|
|
172 |
}
|
|
173 |
|
|
174 |
/**
|
|
175 |
* Computes the final size of this frame. After this method has been called, methods that change
|
|
176 |
* the frame size cannot be called anymore, e.g., no more spill slots or outgoing arguments can
|
|
177 |
* be requested.
|
|
178 |
*/
|
|
179 |
public void finish() {
|
|
180 |
frameSize = currentFrameSize();
|
|
181 |
if (frameSize > getRegisterConfig().getMaximumFrameSize()) {
|
|
182 |
throw new PermanentBailoutException("Frame size (%d) exceeded maximum allowed frame size (%d).", frameSize, getRegisterConfig().getMaximumFrameSize());
|
|
183 |
}
|
|
184 |
}
|
|
185 |
|
|
186 |
/**
|
|
187 |
* Computes the offset of a stack slot relative to the frame register.
|
|
188 |
*
|
|
189 |
* @param slot a stack slot
|
|
190 |
* @return the offset of the stack slot
|
|
191 |
*/
|
|
192 |
public int offsetForStackSlot(StackSlot slot) {
|
|
193 |
if (slot.isInCallerFrame()) {
|
|
194 |
accessesCallerFrame = true;
|
|
195 |
}
|
|
196 |
return slot.getOffset(totalFrameSize());
|
|
197 |
}
|
|
198 |
|
|
199 |
/**
|
|
200 |
* Informs the frame map that the compiled code calls a particular method, which may need stack
|
|
201 |
* space for outgoing arguments.
|
|
202 |
*
|
|
203 |
* @param cc The calling convention for the called method.
|
|
204 |
*/
|
|
205 |
public void callsMethod(CallingConvention cc) {
|
|
206 |
reserveOutgoing(cc.getStackSize());
|
|
207 |
}
|
|
208 |
|
|
209 |
/**
|
|
210 |
* Reserves space for stack-based outgoing arguments.
|
|
211 |
*
|
|
212 |
* @param argsSize The amount of space (in bytes) to reserve for stack-based outgoing arguments.
|
|
213 |
*/
|
|
214 |
public void reserveOutgoing(int argsSize) {
|
|
215 |
assert frameSize == -1 : "frame size must not yet be fixed";
|
|
216 |
outgoingSize = Math.max(outgoingSize, argsSize);
|
|
217 |
hasOutgoingStackArguments = hasOutgoingStackArguments || argsSize > 0;
|
|
218 |
}
|
|
219 |
|
|
220 |
/**
|
|
221 |
* Returns the spill slot size for the given {@link ValueKind}. The default value is the size in
|
|
222 |
* bytes for the target architecture.
|
|
223 |
*
|
|
224 |
* @param kind the {@link ValueKind} to be stored in the spill slot.
|
|
225 |
* @return the size in bytes
|
|
226 |
*/
|
|
227 |
public int spillSlotSize(ValueKind<?> kind) {
|
|
228 |
return kind.getPlatformKind().getSizeInBytes();
|
|
229 |
}
|
|
230 |
|
|
231 |
/**
|
|
232 |
* Reserves a spill slot in the frame of the method being compiled. The returned slot is aligned
|
|
233 |
* on its natural alignment, i.e., an 8-byte spill slot is aligned at an 8-byte boundary, unless
|
|
234 |
* overridden by a subclass.
|
|
235 |
*
|
|
236 |
* @param kind The kind of the spill slot to be reserved.
|
|
237 |
* @return A spill slot denoting the reserved memory area.
|
|
238 |
*/
|
|
239 |
public StackSlot allocateSpillSlot(ValueKind<?> kind) {
|
|
240 |
assert frameSize == -1 : "frame size must not yet be fixed";
|
|
241 |
int size = spillSlotSize(kind);
|
|
242 |
spillSize = NumUtil.roundUp(spillSize + size, size);
|
55509
|
243 |
return newStackSlot(kind);
|
|
244 |
}
|
|
245 |
|
|
246 |
private StackSlot newStackSlot(ValueKind<?> kind) {
|
|
247 |
return StackSlot.get(kind, -spillSize, true);
|
43972
|
248 |
}
|
|
249 |
|
|
250 |
/**
|
|
251 |
* Returns the size of the stack slot range for {@code slots} objects.
|
|
252 |
*
|
|
253 |
* @param slots The number of slots.
|
|
254 |
* @return The size in byte
|
|
255 |
*/
|
|
256 |
public int spillSlotRangeSize(int slots) {
|
|
257 |
return slots * getTarget().wordSize;
|
|
258 |
}
|
|
259 |
|
|
260 |
/**
|
|
261 |
* Reserves a number of contiguous slots in the frame of the method being compiled. If the
|
|
262 |
* requested number of slots is 0, this method returns {@code null}.
|
|
263 |
*
|
|
264 |
* @param slots the number of slots to reserve
|
|
265 |
* @return the first reserved stack slot (i.e., at the lowest address)
|
|
266 |
*/
|
55509
|
267 |
public StackSlot allocateStackSlots(int slots) {
|
43972
|
268 |
assert frameSize == -1 : "frame size must not yet be fixed";
|
|
269 |
if (slots == 0) {
|
|
270 |
return null;
|
|
271 |
}
|
55509
|
272 |
spillSize = NumUtil.roundUp(spillSize + spillSlotRangeSize(slots), getTarget().wordSize);
|
|
273 |
return newStackSlot(LIRKind.value(getTarget().arch.getWordKind()));
|
43972
|
274 |
}
|
|
275 |
|
|
276 |
public ReferenceMapBuilder newReferenceMapBuilder() {
|
|
277 |
return referenceMapFactory.newReferenceMapBuilder(totalFrameSize());
|
|
278 |
}
|
|
279 |
}
|