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package jdk.tools.jaotc;

import jdk.tools.jaotc.binformat.BinaryContainer;
import jdk.tools.jaotc.binformat.Relocation;
import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage;

import jdk.vm.ci.code.BytecodePosition;
import jdk.vm.ci.code.VirtualObject;
import jdk.vm.ci.code.site.Call;
import jdk.vm.ci.code.site.Infopoint;
import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
import jdk.vm.ci.hotspot.HotSpotResolvedObjectType;
import jdk.vm.ci.meta.InvokeTarget;

final class InfopointProcessor {

    private final DataBuilder dataBuilder;

    private final BinaryContainer binaryContainer;

    InfopointProcessor(DataBuilder dataBuilder) {
        this.dataBuilder = dataBuilder;
        this.binaryContainer = dataBuilder.getBinaryContainer();
    }

    
Parse an Infopoint generated by the compiler and create all needed binary section constructs.
Params:
  • methodInfo – compiled method info
  • info – info point being processed
/** * Parse an {@link Infopoint} generated by the compiler and create all needed binary section * constructs. * * @param methodInfo compiled method info * @param info info point being processed */
void process(CompiledMethodInfo methodInfo, Infopoint info) { switch (info.reason) { case CALL: // All calls in compiled code need a symbol and relocation entry. processCallInfoPoint(methodInfo, (Call) info); break; case SAFEPOINT: case IMPLICIT_EXCEPTION: case METHOD_START: case METHOD_END: case BYTECODE_POSITION: break; default: throw new InternalError("Unknown info point reason: " + info.reason); } if (info.debugInfo == null) { return; } BytecodePosition bcp = info.debugInfo.getBytecodePosition(); if (bcp == null) { return; } recordScopeKlasses(methodInfo, bcp, info.debugInfo.getVirtualObjectMapping()); } private void recordScopeKlasses(CompiledMethodInfo methodInfo, BytecodePosition bcp, VirtualObject[] vos) { BytecodePosition caller = bcp.getCaller(); if (caller != null) { recordScopeKlasses(methodInfo, caller, vos); } HotSpotResolvedJavaMethod m = (HotSpotResolvedJavaMethod) bcp.getMethod(); HotSpotResolvedObjectType klass = m.getDeclaringClass(); methodInfo.addDependentKlassData(binaryContainer, klass); if (vos == null) { return; } for (VirtualObject vo : vos) { HotSpotResolvedObjectType vk = (HotSpotResolvedObjectType) vo.getType(); methodInfo.addDependentKlassData(binaryContainer, vk); } }
Process Call info points in Graal generated compilation result. We want to create one of the following relocations: .text -> .hotspot.plt.linkage - Java method to Java method call .text -> .text - Java method / Graal stub to Graal stub call .text -> .plt - Java method / Graal stub to VM method call.
Params:
  • methodInfo – compiled method info
  • call – call
/** * Process Call info points in Graal generated compilation result. We want to create one of the * following relocations: .text -> .hotspot.plt.linkage - Java method to Java method call .text * -> .text - Java method / Graal stub to Graal stub call .text -> .plt - Java method / Graal * stub to VM method call. * * @param methodInfo compiled method info * @param call call */
private void processCallInfoPoint(CompiledMethodInfo methodInfo, Call call) { CallSiteRelocationInfo callSiteRelocation = getCallSiteRelocationInfo(call); CallSiteRelocationSymbol callSiteRelocationSymbol = getCallSiteRelocationSymbol(methodInfo, call, callSiteRelocation); Relocation relocation = new Relocation(methodInfo.getTextSectionOffset() + call.pcOffset, callSiteRelocation.type, call.size, binaryContainer.getCodeContainer(), callSiteRelocationSymbol.symbol); binaryContainer.addRelocation(relocation); }
Get information about the call site. Name of the callee and relocation call type.
/** * Get information about the call site. Name of the callee and relocation call type. */
private static CallSiteRelocationInfo getCallSiteRelocationInfo(Call call) { InvokeTarget callTarget = call.target; if (callTarget instanceof HotSpotResolvedJavaMethod) { return new JavaCallSiteRelocationInfo(call, (HotSpotResolvedJavaMethod) callTarget); } else if (callTarget instanceof HotSpotForeignCallLinkage) { return new ForeignCallSiteRelocationInfo(call, (HotSpotForeignCallLinkage) callTarget); } else { throw new InternalError("Unhandled call type found in infopoint: " + callTarget); } }
Return a relocation symbol for the given call site.
/** * Return a relocation symbol for the given call site. */
private CallSiteRelocationSymbol getCallSiteRelocationSymbol(CompiledMethodInfo mi, Call call, CallSiteRelocationInfo callSiteRelocation) { switch (callSiteRelocation.type) { case STUB_CALL_DIRECT: return new StubDirectCallSiteRelocationSymbol(callSiteRelocation, binaryContainer); case FOREIGN_CALL_INDIRECT_GOT: return new ForeignGotCallSiteRelocationSymbol(mi, call, callSiteRelocation, dataBuilder); default: return new JavaCallSiteRelocationSymbol(mi, call, callSiteRelocation, binaryContainer); } } }