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| 1 | +// Copyright 2024 The Bazel Authors. All rights reserved. |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +package com.google.devtools.build.lib.analysis; |
| 16 | + |
| 17 | +import static com.google.common.truth.Truth.assertThat; |
| 18 | + |
| 19 | +import com.google.common.collect.ImmutableSet; |
| 20 | +import com.google.devtools.build.lib.analysis.config.BuildConfigurationValue; |
| 21 | +import com.google.devtools.build.lib.analysis.util.BuildViewTestCase; |
| 22 | +import com.google.devtools.build.lib.cmdline.Label; |
| 23 | +import com.google.devtools.build.lib.collect.nestedset.NestedSet; |
| 24 | +import com.google.devtools.build.lib.packages.Attribute; |
| 25 | +import com.google.devtools.build.lib.packages.Attribute.LateBoundDefault; |
| 26 | +import com.google.devtools.build.lib.packages.AttributeMap; |
| 27 | +import com.google.devtools.build.lib.packages.BuildType; |
| 28 | +import com.google.devtools.build.lib.packages.RuleClass; |
| 29 | +import com.google.devtools.build.lib.skyframe.TransitiveTargetKey; |
| 30 | +import com.google.devtools.build.lib.skyframe.TransitiveTargetValue; |
| 31 | +import com.google.devtools.build.skyframe.EvaluationContext; |
| 32 | +import com.google.devtools.build.skyframe.EvaluationResult; |
| 33 | +import com.google.devtools.build.skyframe.SkyKey; |
| 34 | +import com.google.devtools.build.skyframe.SkyValue; |
| 35 | +import java.util.Arrays; |
| 36 | +import java.util.List; |
| 37 | +import org.junit.Rule; |
| 38 | +import org.junit.Test; |
| 39 | +import org.junit.runner.RunWith; |
| 40 | +import org.junit.runners.JUnit4; |
| 41 | +import org.mockito.Mock; |
| 42 | +import org.mockito.junit.MockitoJUnit; |
| 43 | +import org.mockito.junit.MockitoRule; |
| 44 | + |
| 45 | +/** |
| 46 | + * Tests that late bound label declarations obey the invariant that the computed label is in the |
| 47 | + * transitive closure of the default label. |
| 48 | + */ |
| 49 | +@RunWith(JUnit4.class) |
| 50 | +public class LateBoundAttributeTest extends BuildViewTestCase { |
| 51 | + |
| 52 | + /** |
| 53 | + * These attributes are only an exception because we can't easily test them: their default value |
| 54 | + * as determined by the {@link DependencyResolutionHelpers} depends on the rule, not just on the |
| 55 | + * rule class and configuration. The problem with the test below is that we don't instantiate |
| 56 | + * rules and the {@link #attributes} collection is just an empty mock. |
| 57 | + */ |
| 58 | + private static final ImmutableSet<String> ATTRIBUTE_EXCEPTIONS = |
| 59 | + ImmutableSet.of(":computed_cc_rpc_libs"); |
| 60 | + |
| 61 | + @Rule public final MockitoRule mocks = MockitoJUnit.rule(); |
| 62 | + |
| 63 | + @Mock private AttributeMap attributes; |
| 64 | + |
| 65 | + @Test |
| 66 | + public void testInvariant() throws Exception { |
| 67 | + // This configuration makes java_proto_library and java_lite_proto_library's toolchain |
| 68 | + // attributes to have defaultValue == actualValue, which makes the test below skip them. |
| 69 | + // Otherwise, the test chokes bec
F438
ause it tries to traverse the non-existent |
| 70 | + // tools/proto/toolchains/BUILD file. |
| 71 | + useConfiguration( |
| 72 | + "--proto_toolchain_for_java=//tools/proto/toolchains:java", |
| 73 | + "--proto_toolchain_for_javalite=//tools/proto/toolchains:javalite"); |
| 74 | + |
| 75 | + new LabelChecker(getTargetConfiguration()) |
| 76 | + .checkRuleClasses(ruleClassProvider.getRuleClassMap().values()); |
| 77 | + |
| 78 | + new LabelChecker(getExecConfiguration()) |
| 79 | + .checkRuleClasses(ruleClassProvider.getRuleClassMap().values()); |
| 80 | + } |
| 81 | + |
| 82 | + private class LabelChecker { |
| 83 | + private final BuildConfigurationValue configuration; |
| 84 | + private boolean failed; |
| 85 | + |
| 86 | + LabelChecker(BuildConfigurationValue configuration) { |
| 87 | + this.configuration = configuration; |
| 88 | + } |
| 89 | + |
| 90 | + void checkRuleClasses(Iterable<RuleClass> ruleClasses) throws Exception { |
| 91 | + for (RuleClass ruleClass : ruleClasses) { |
| 92 | + checkRuleClass(ruleClass); |
| 93 | + } |
| 94 | + // If this fails you need to check your rule class declarations. |
| 95 | + assertThat(failed).isFalse(); |
| 96 | + } |
| 97 | + |
| 98 | + private void checkRuleClass(RuleClass ruleClass) throws Exception { |
| 99 | + if (ruleClass.getName().startsWith("$")) { |
| 100 | + // Ignore abstract rule classes. |
| 101 | + return; |
| 102 | + } |
| 103 | + |
| 104 | + for (Attribute attribute : ruleClass.getAttributes()) { |
| 105 | + checkAttribute(ruleClass, attribute); |
| 106 | + } |
| 107 | + } |
| 108 | + |
| 109 | + private void checkAttribute(RuleClass ruleClass, Attribute attribute) throws Exception { |
| 110 | + String attributeName = attribute.getName(); |
| 111 | + if (!Attribute.isAnalysisDependent(attributeName)) { |
| 112 | + return; |
| 113 | + } |
| 114 | + |
| 115 | + if (ATTRIBUTE_EXCEPTIONS.contains(attributeName)) { |
| 116 | + return; |
| 117 | + } |
| 118 | + |
| 119 | + if (attribute.getType() == BuildType.LABEL) { |
| 120 | + Label label; |
| 121 | + label = |
| 122 | + BuildType.LABEL.cast( |
| 123 | + DependencyResolutionHelpers.resolveLateBoundDefault( |
| 124 | + null, attributes, attribute, configuration)); |
| 125 | + if (label != null) { |
| 126 | + checkLabel(ruleClass, attribute, label); |
| 127 | + } |
| 128 | + } else if (attribute.getType() == BuildType.LABEL_LIST) { |
| 129 | + List<Label> labels; |
| 130 | + labels = |
| 131 | + BuildType.LABEL_LIST.cast( |
| 132 | + DependencyResolutionHelpers.resolveLateBoundDefault( |
| 133 | + null, attributes, attribute, configuration)); |
| 134 | + for (Label label : labels) { |
| 135 | + checkLabelList(ruleClass, attribute, label); |
| 136 | + } |
| 137 | + } else { |
| 138 | + throw new AssertionError("Unknown attribute: '" + attributeName + "'"); |
| 139 | + } |
| 140 | + } |
| 141 | + |
| 142 | + /** |
| 143 | + * We check that the label set by the {@link DependencyResolutionHelpers} with the default |
| 144 | + * configuration is in the transitive closure of the default value set in the rule class. |
| 145 | + * |
| 146 | + * <p>Branches created using the result of {@code "blaze query deps(//target)"} only work if all |
| 147 | + * labels loaded by blaze during the loading phase are also returned by this query. The check |
| 148 | + * here is a bit stricter than that, and disallows omitting the label if another attribute |
| 149 | + * already sets the same label. |
| 150 | + */ |
| 151 | + void checkLabel(RuleClass ruleClass, Attribute attribute, Label label) throws Exception { |
| 152 | + Label defaultValue; |
| 153 | + if (attribute.getDefaultValueUnchecked() instanceof LateBoundDefault<?, ?>) { |
| 154 | + defaultValue = |
| 155 | + BuildType.LABEL.cast( |
| 156 | + ((LateBoundDefault<?, ?>) attribute.getDefaultValueUnchecked()).getDefault(null)); |
| 157 | + } else { |
| 158 | + defaultValue = (Label) attribute.getDefaultValueUnchecked(); |
| 159 | + } |
| 160 | + if ((defaultValue == null) || !existsPath(defaultValue, label)) { |
| 161 | + System.err.println("in " + ruleClass.getName() + " attribute " + attribute.getName() + ":"); |
| 162 | + System.err.println(" " + label + " is not in the transitive closure of " + defaultValue); |
| 163 | + failed = true; |
| 164 | + } |
| 165 | + } |
| 166 | + |
| 167 | + /** |
| 168 | + * Similar to {@link #checkLabel} except for we check that the label is reachable by *any* |
| 169 | + * value in the default value (doesn't need to be reachable by all values in the default). |
| 170 | + */ |
| 171 | + @SuppressWarnings("unchecked") |
| 172 | + void checkLabelList(RuleClass ruleClass, Attribute attribute, Label label) throws Exception { |
| 173 | + List<Label> defaultValues; |
| 174 | + if (attribute.getDefaultValueUnchecked() instanceof LateBoundDefault<?, ?>) { |
| 175 | + defaultValues = |
| 176 | + BuildType.LABEL_LIST.cast( |
| 177 | + ((LateBoundDefault<?, ?>) attribute.getDefaultValueUnchecked()).getDefault(null)); |
| 178 | + } else { |
| 179 | + defaultValues = (List<Label>) attribute.getDefaultValueUnchecked(); |
| 180 | + } |
| 181 | + failed = true; |
| 182 | + if (defaultValues == null) { |
| 183 | + System.err.println("in " + ruleClass.getName() + " attribute " + attribute.getName() + ":"); |
| 184 | + System.err.println(" no available default for this attribute"); |
| 185 | + } else { |
| 186 | + for (Label defaultLabel : defaultValues) { |
| 187 | + if (existsPath(defaultLabel, label)) { |
| 188 | + failed = false; |
| 189 | + } |
| 190 | + } |
| 191 | + // label was not reachable from any label in the defaultValue |
| 192 | + if (failed) { |
| 193 | + System.out.println( |
| 194 | + "in " + ruleClass.getName() + " attribute " + attribute.getName() + ":"); |
| 195 | + System.out.println( |
| 196 | + " " + label + " is not in the transitive closure of " |
| 197 | + + Arrays.toString(defaultValues.toArray())); |
| 198 | + } |
| 199 | + } |
| 200 | + } |
| 201 | + |
| 202 | + /** |
| 203 | + * Returns whether a path exists from the first given label to the second. |
| 204 | + */ |
| 205 | + private boolean existsPath(Label from, Label to) throws Exception { |
| 206 | + return from.equals(to) || visitTransitively(from).toList().contains(to); |
| 207 | + } |
| 208 | + |
| 209 | + private NestedSet<Label> visitTransitively(Label label) throws InterruptedException { |
| 210 | + SkyKey key = TransitiveTargetKey.of(label); |
| 211 | + EvaluationContext evaluationContext = |
| 212 | + EvaluationContext.newBuilder().setParallelism(5).setEventHandler(reporter).build(); |
| 213 | + EvaluationResult<SkyValue> result = |
| 214 | + getSkyframeExecutor().prepareAndGet(ImmutableSet.of(key), evaluationContext); |
| 215 | + TransitiveTargetValue value = (TransitiveTargetValue) result.get(key); |
| 216 | + boolean hasTransitiveError = (value == null) || value.encounteredLoadingError(); |
| 217 | + if (result.hasError() || hasTransitiveError) { |
| 218 | + throw new RuntimeException(result.getError().getException()); |
| 219 | + } |
| 220 | + return value.getTransitiveTargets(); |
| 221 | + } |
| 222 | + } |
| 223 | +} |
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