1 /*
2 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
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 */
23
24 package jdk.tools.jaotc;
25
26 import jdk.tools.jaotc.binformat.BinaryContainer;
27 import jdk.tools.jaotc.binformat.Relocation;
28 import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage;
29
30 import jdk.vm.ci.code.BytecodePosition;
31 import jdk.vm.ci.code.VirtualObject;
32 import jdk.vm.ci.code.site.Call;
33 import jdk.vm.ci.code.site.Infopoint;
34 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
35 import jdk.vm.ci.hotspot.HotSpotResolvedObjectType;
36 import jdk.vm.ci.meta.InvokeTarget;
37
38 final class InfopointProcessor {
39
40 private final DataBuilder dataBuilder;
41
42 private final BinaryContainer binaryContainer;
43
44 InfopointProcessor(DataBuilder dataBuilder) {
45 this.dataBuilder = dataBuilder;
46 this.binaryContainer = dataBuilder.getBinaryContainer();
47 }
48
49 /**
50 * Parse an {@link Infopoint} generated by the compiler and create all needed binary section
51 * constructs.
52 *
53 * @param methodInfo compiled method info
54 * @param info info point being processed
55 */
56 void process(CompiledMethodInfo methodInfo, Infopoint info) {
57 switch (info.reason) {
58 case CALL:
59 // All calls in compiled code need a symbol and relocation entry.
60 processCallInfoPoint(methodInfo, (Call) info);
61 break;
62 case SAFEPOINT:
63 case IMPLICIT_EXCEPTION:
64 case METHOD_START:
65 case METHOD_END:
66 case BYTECODE_POSITION:
67 break;
68 default:
69 throw new InternalError("Unknown info point reason: " + info.reason);
70 }
71 if (info.debugInfo == null) {
72 return;
73 }
74 BytecodePosition bcp = info.debugInfo.getBytecodePosition();
75 if (bcp == null) {
76 return;
77 }
78 recordScopeKlasses(methodInfo, bcp, info.debugInfo.getVirtualObjectMapping());
79 }
80
81 private void recordScopeKlasses(CompiledMethodInfo methodInfo, BytecodePosition bcp, VirtualObject[] vos) {
82 BytecodePosition caller = bcp.getCaller();
83 if (caller != null) {
84 recordScopeKlasses(methodInfo, caller, vos);
85 }
86
87 HotSpotResolvedJavaMethod m = (HotSpotResolvedJavaMethod) bcp.getMethod();
88 HotSpotResolvedObjectType klass = m.getDeclaringClass();
89 methodInfo.addDependentKlassData(binaryContainer, klass);
90
91 if (vos == null) {
92 return;
93 }
94 for (VirtualObject vo : vos) {
95 HotSpotResolvedObjectType vk = (HotSpotResolvedObjectType) vo.getType();
96 methodInfo.addDependentKlassData(binaryContainer, vk);
97 }
98
99 }
100
101 /**
102 * Process Call info points in Graal generated compilation result. We want to create one of the
103 * following relocations: .text -> .hotspot.plt.linkage - Java method to Java method call .text
104 * -> .text - Java method / Graal stub to Graal stub call .text -> .plt - Java method / Graal
105 * stub to VM method call.
106 *
107 * @param methodInfo compiled method info
108 * @param call call
109 */
110 private void processCallInfoPoint(CompiledMethodInfo methodInfo, Call call) {
111 CallSiteRelocationInfo callSiteRelocation = getCallSiteRelocationInfo(call);
112 CallSiteRelocationSymbol callSiteRelocationSymbol = getCallSiteRelocationSymbol(methodInfo, call, callSiteRelocation);
113
114 Relocation relocation = new Relocation(methodInfo.getTextSectionOffset() + call.pcOffset, callSiteRelocation.type, call.size, binaryContainer.getCodeContainer(),
115 callSiteRelocationSymbol.symbol);
116 binaryContainer.addRelocation(relocation);
117 }
118
119 /**
120 * Get information about the call site. Name of the callee and relocation call type.
121 */
122 private static CallSiteRelocationInfo getCallSiteRelocationInfo(Call call) {
123 InvokeTarget callTarget = call.target;
124 if (callTarget instanceof HotSpotResolvedJavaMethod) {
125 return new JavaCallSiteRelocationInfo(call, (HotSpotResolvedJavaMethod) callTarget);
126 } else if (callTarget instanceof HotSpotForeignCallLinkage) {
127 return new ForeignCallSiteRelocationInfo(call, (HotSpotForeignCallLinkage) callTarget);
128 } else {
129 throw new InternalError("Unhandled call type found in infopoint: " + callTarget);
130 }
131 }
132
133 /**
134 * Return a relocation symbol for the given call site.
135 */
136 private CallSiteRelocationSymbol getCallSiteRelocationSymbol(CompiledMethodInfo mi, Call call, CallSiteRelocationInfo callSiteRelocation) {
137 switch (callSiteRelocation.type) {
138 case STUB_CALL_DIRECT:
139 return new StubDirectCallSiteRelocationSymbol(callSiteRelocation, binaryContainer);
140 case FOREIGN_CALL_INDIRECT_GOT:
141 return new ForeignGotCallSiteRelocationSymbol(mi, call, callSiteRelocation, dataBuilder);
142 default:
143 return new JavaCallSiteRelocationSymbol(mi, call, callSiteRelocation, binaryContainer);
144 }
145 }
146
147 }