1 files changed, 96 insertions, 0 deletions
diff --git a/third_party/java/proguard/proguard5.3.3/src/proguard/classfile/constant/visitor/BootstrapMethodHandleTraveler.java b/third_party/java/proguard/proguard5.3.3/src/proguard/classfile/constant/visitor/BootstrapMethodHandleTraveler.java
new file mode 100644
index 0000000000..032dafb972
--- /dev/null
+++ b/third_party/java/proguard/proguard5.3.3/src/proguard/classfile/constant/visitor/BootstrapMethodHandleTraveler.java
@@ -0,0 +1,96 @@
+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2017 Eric Lafortune @ GuardSquare
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program 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 for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package proguard.classfile.constant.visitor;
+
+import proguard.classfile.Clazz;
+import proguard.classfile.attribute.*;
+import proguard.classfile.attribute.visitor.*;
+import proguard.classfile.constant.*;
+import proguard.classfile.util.SimplifiedVisitor;
+
+/**
+ * This ConstantVisitor and BootstrapMethodInfoVisitor travels from any invoke
+ * dynamic constants or bootstrap method info entries that it visits to their
+ * bootstrap method handle constants, and applies a given constant visitor.
+ *
+ * @author Eric Lafortune
+ */
+public class BootstrapMethodHandleTraveler
+extends      SimplifiedVisitor
+implements   ConstantVisitor,
+             AttributeVisitor,
+             BootstrapMethodInfoVisitor
+{
+    private ConstantVisitor bootstrapMethodHandleVisitor;
+
+    // Field serving as a method argument.
+    int bootstrapMethodAttributeIndex;
+
+
+    /**
+     * Creates a new BootstrapMethodHandleVisitor that will delegate to the
+     * given constant visitor.
+     */
+    public BootstrapMethodHandleTraveler(ConstantVisitor bootstrapMethodHandleVisitor)
+    {
+        this.bootstrapMethodHandleVisitor = bootstrapMethodHandleVisitor;
+    }
+
+
+    // Implementations for ConstantVisitor.
+
+    public void visitAnyConstant(Clazz clazz, Constant constant) {}
+
+
+    public void visitInvokeDynamicConstant(Clazz clazz, InvokeDynamicConstant invokeDynamicConstant)
+    {
+        // Pass the method index.
+        bootstrapMethodAttributeIndex =
+            invokeDynamicConstant.u2bootstrapMethodAttributeIndex;
+
+        // Delegate to the bootstrap method.
+        clazz.attributesAccept(this);
+    }
+
+
+    // Implementations for AttributeVisitor.
+
+    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
+
+
+    public void visitBootstrapMethodsAttribute(Clazz clazz, BootstrapMethodsAttribute bootstrapMethodsAttribute)
+    {
+        // Check bootstrap methods.
+        bootstrapMethodsAttribute.bootstrapMethodEntryAccept(clazz,
+                                                             bootstrapMethodAttributeIndex,
+                                                             this);
+    }
+
+
+    // Implementations for BootstrapMethodInfoVisitor.
+
+    public void visitBootstrapMethodInfo(Clazz clazz, BootstrapMethodInfo bootstrapMethodInfo)
+    {
+        // Check bootstrap method.
+        clazz.constantPoolEntryAccept(bootstrapMethodInfo.u2methodHandleIndex,
+                                      bootstrapMethodHandleVisitor);
+    }
+}