plugin to fix the "bug" in issue #786

2026-05-23 03:55:36 +00:00 · 2015-10-22 09:00:27 +02:00
parent 77292daf2f
commit f10303b4ab
11 changed files with 1750 additions and 14 deletions
--- a/libsrc/plugins/src/AS3JumpOverflowFix.java
+++ b/libsrc/plugins/src/AS3JumpOverflowFix.java
@@ -0,0 +1,74 @@
+
+import com.jpexs.decompiler.flash.SWF;
+import com.jpexs.decompiler.flash.abc.ABC;
+import com.jpexs.decompiler.flash.abc.types.MethodBody;
+import com.jpexs.decompiler.flash.abc.types.traits.Trait;
+import com.jpexs.decompiler.flash.action.Action;
+import com.jpexs.decompiler.flash.action.ActionList;
+import com.jpexs.decompiler.flash.action.swf4.ActionIf;
+import com.jpexs.decompiler.flash.action.swf4.ActionJump;
+import com.jpexs.decompiler.flash.helpers.SWFDecompilerListener;
+import com.jpexs.decompiler.graph.GraphTargetItem;
+import java.util.List;
+
+public class AS3JumpOverflowFix implements SWFDecompilerListener {
+
+    @Override
+    public byte[] proxyFileCatched(byte[] data) {
+        return null;
+    }
+
+    @Override
+    public void actionListParsed(ActionList actions, SWF swf) {
+        if (actions.isEmpty()) {
+            return;
+        }
+
+        long startAddress = actions.get(0).getAddress();
+        long endAddress = actions.get(actions.size() - 1).getAddress();
+        for (int i = 0; i < actions.size(); i++) {
+            Action action = actions.get(i);
+            if (action instanceof ActionIf || action instanceof ActionJump) {
+                Action container = (Action) actions.getContainer(i);
+                long containerStartAddress = startAddress;
+                if (container != null) {
+                    containerStartAddress = container.getAddress();
+                }
+
+                if (action instanceof ActionIf) {
+                    ActionIf aIf = (ActionIf) action;
+                    long target = aIf.getTargetAddress();
+                    if (target < containerStartAddress && target + 0xffff < endAddress) {
+                        aIf.setJumpOffset(aIf.getJumpOffset() + 0xffff);
+                    }
+                } else if (action instanceof ActionJump) {
+                    ActionJump aJump = (ActionJump) action;
+                    long target = aJump.getTargetAddress();
+                    if (target < containerStartAddress && target + 0xffff < endAddress) {
+                        aJump.setJumpOffset(aJump.getJumpOffset() + 0xffff);
+                    }
+                }
+            }
+        }
+    }
+
+    @Override
+    public void actionTreeCreated(List<GraphTargetItem> tree, SWF swf) {
+    }
+
+    @Override
+    public void swfParsed(SWF swf) {
+    }
+
+    @Override
+    public void abcParsed(ABC abc, SWF swf) {
+    }
+
+    @Override
+    public void methodBodyParsed(MethodBody body, SWF swf) {
+    }
+
+    @Override
+    public void avm2CodeRemoveTraps(String path, int classIndex, boolean isStatic, int scriptIndex, ABC abc, Trait trait, int methodInfo, MethodBody body) throws InterruptedException {
+    }
+}