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SubstrateVM static analysis to find ahead-of-time the code
/*
* Copyright (c) 2021, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.oracle.graal.pointsto.flow;
import com.oracle.graal.pointsto.BigBang;
import com.oracle.graal.pointsto.api.HostVM;
import com.oracle.graal.pointsto.infrastructure.GraphProvider.Purpose;
import com.oracle.graal.pointsto.meta.AnalysisMethod;
import com.oracle.graal.pointsto.phases.SubstrateIntrinsicGraphBuilder;
import com.oracle.graal.pointsto.util.AnalysisError;
import com.oracle.svm.util.ClassUtil;
import jdk.graal.compiler.api.runtime.GraalJVMCICompiler;
import jdk.graal.compiler.bytecode.Bytecode;
import jdk.graal.compiler.bytecode.ResolvedJavaMethodBytecode;
import jdk.graal.compiler.core.common.PermanentBailoutException;
import jdk.graal.compiler.debug.DebugContext;
import jdk.graal.compiler.debug.DebugContext.Builder;
import jdk.graal.compiler.debug.DebugContext.Description;
import jdk.graal.compiler.debug.Indent;
import jdk.graal.compiler.nodes.EncodedGraph;
import jdk.graal.compiler.nodes.GraphEncoder;
import jdk.graal.compiler.nodes.StructuredGraph;
import jdk.graal.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration;
import jdk.graal.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration.BytecodeExceptionMode;
import jdk.graal.compiler.nodes.graphbuilderconf.InvocationPlugin;
import jdk.graal.compiler.options.OptionValues;
import jdk.graal.compiler.phases.OptimisticOptimizations;
import jdk.graal.compiler.printer.GraalDebugHandlersFactory;
import jdk.graal.compiler.runtime.RuntimeProvider;
import jdk.vm.ci.code.Architecture;
import jdk.vm.ci.runtime.JVMCI;
public final class AnalysisParsedGraph {
/**
* The architecture that the image builder is running on. This determines whether unaligned
* memory accesses are available for graph encoding / decoding at image build time.
*/
public static final Architecture HOST_ARCHITECTURE;
static {
GraalJVMCICompiler compiler = (GraalJVMCICompiler) JVMCI.getRuntime().getCompiler();
HOST_ARCHITECTURE = compiler.getGraalRuntime().getCapability(RuntimeProvider.class).getHostBackend().getTarget().arch;
}
private static final AnalysisParsedGraph EMPTY = new AnalysisParsedGraph(null, false);
private final EncodedGraph encodedGraph;
private final boolean isIntrinsic;
private AnalysisParsedGraph(EncodedGraph encodedGraph, boolean isIntrinsic) {
this.isIntrinsic = isIntrinsic;
this.encodedGraph = encodedGraph;
}
public EncodedGraph getEncodedGraph() {
return encodedGraph;
}
public boolean isIntrinsic() {
return isIntrinsic;
}
@SuppressWarnings("try")
public static AnalysisParsedGraph parseBytecode(BigBang bb, AnalysisMethod method) {
if (bb == null) {
throw AnalysisError.shouldNotReachHere("BigBang object required for parsing method " + method.format("%H.%p(%n)"));
}
OptionValues options = bb.getOptions();
Description description = new Description(method, ClassUtil.getUnqualifiedName(method.getClass()) + ":" + method.getId());
DebugContext debug = new Builder(options, new GraalDebugHandlersFactory(bb.getSnippetReflectionProvider())).description(description).build();
try (Indent indent = debug.logAndIndent("parse graph %s", method)) {
Object result = bb.getHostVM().parseGraph(bb, debug, method);
if (result != HostVM.PARSING_UNHANDLED) {
if (result instanceof StructuredGraph) {
return optimizeAndEncode(bb, method, (StructuredGraph) result, false);
} else {
assert result == HostVM.PARSING_FAILED : result;
return EMPTY;
}
}
StructuredGraph graph = method.buildGraph(debug, method, bb.getProviders(method), Purpose.ANALYSIS);
if (graph != null) {
return optimizeAndEncode(bb, method, graph, false);
}
InvocationPlugin plugin = bb.getProviders(method).getGraphBuilderPlugins().getInvocationPlugins().lookupInvocation(method, options);
if (plugin != null && !plugin.inlineOnly()) {
Bytecode code = new ResolvedJavaMethodBytecode(method);
graph = new SubstrateIntrinsicGraphBuilder(options, debug, bb.getProviders(method), code).buildGraph(plugin);
if (graph != null) {
return optimizeAndEncode(bb, method, graph, true);
}
}
if (method.getCode() == null) {
return EMPTY;
}
graph = new StructuredGraph.Builder(options, debug)
.method(method)
.recordInlinedMethods(bb.getHostVM().recordInlinedMethods(method))
.build();
try (DebugContext.Scope s = debug.scope("ClosedWorldAnalysis", graph, method)) {
// enable this logging to get log output in compilation passes
try (Indent indent2 = debug.logAndIndent("parse graph phases")) {
GraphBuilderConfiguration config = GraphBuilderConfiguration.getDefault(bb.getProviders(method).getGraphBuilderPlugins())
.withEagerResolving(true)
.withUnresolvedIsError(false)
.withNodeSourcePosition(true)
.withBytecodeExceptionMode(BytecodeExceptionMode.CheckAll)
.withRetainLocalVariables(true);
config = bb.getHostVM().updateGraphBuilderConfiguration(config, method);
bb.getHostVM().createGraphBuilderPhase(bb.getProviders(method), config, OptimisticOptimizations.NONE, null).apply(graph);
} catch (PermanentBailoutException ex) {
bb.getUnsupportedFeatures().addMessage(method.format("%H.%n(%p)"), method, ex.getLocalizedMessage(), null, ex);
return EMPTY;
}
} catch (Throwable e) {
throw debug.handle(e);
}
return optimizeAndEncode(bb, method, graph, false);
}
}
@SuppressWarnings("try")
private static AnalysisParsedGraph optimizeAndEncode(BigBang bb, AnalysisMethod method, StructuredGraph graph, boolean isIntrinsic) {
try (DebugContext.Scope s = graph.getDebug().scope("ClosedWorldAnalysis", graph, method)) {
/*
* Must be called before any other thread can access the graph, i.e., before the graph
* is published.
*/
bb.getHostVM().methodAfterParsingHook(bb, method, graph);
EncodedGraph encodedGraph = GraphEncoder.encodeSingleGraph(graph, HOST_ARCHITECTURE);
return new AnalysisParsedGraph(encodedGraph, isIntrinsic);
} catch (Throwable e) {
throw graph.getDebug().handle(e);
}
}
}