From 29a580826f0372878e786e8a60c2f69713db1ecc Mon Sep 17 00:00:00 2001
From: chibash <chiba@javassist.org>
Date: Mon, 27 May 2013 19:20:13 +0900
Subject: [PATCH] fixed JASSIST-195

---
 Readme.html                                   |  2 +-
 .../javassist/bytecode/stackmap/MapMaker.java | 27 +++++++++++++++++++
 src/test/javassist/JvstTest4.java             | 12 ++++++---
 3 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/Readme.html b/Readme.html
index 2cc92bb9..f6936b0d 100644
--- a/Readme.html
+++ b/Readme.html
@@ -285,7 +285,7 @@ see javassist.Dump.
 <ul>
 <li>The source code repository has been moved to <a href="https://github.com/jboss-javassist/javassist">GitHub</a></li>.
 
-<li>JIRA JASSIST-181, 183, 184, 189, 162, 185, 186, 190.
+<li>JIRA JASSIST-181, 183, 184, 189, 162, 185, 186, 190, 199.
 </ul>
 
 <p>-version 3.17.1 on December 3, 2012
diff --git a/src/main/javassist/bytecode/stackmap/MapMaker.java b/src/main/javassist/bytecode/stackmap/MapMaker.java
index e0aa5dac..16d3f294 100644
--- a/src/main/javassist/bytecode/stackmap/MapMaker.java
+++ b/src/main/javassist/bytecode/stackmap/MapMaker.java
@@ -162,6 +162,7 @@ public class MapMaker extends Tracer {
         throws BadBytecode
     {
         make(code, blocks[0]);
+        findDeadCatchers(code, blocks);
         try {
             fixTypes(code, blocks);
         } catch (NotFoundException e) {
@@ -303,6 +304,32 @@ public class MapMaker extends Tracer {
             destTypes[i] = srcTypes[i];
     }
 
+    // Phase 1.5
+
+    /*
+     * Javac may generate an exception handler that catches only an exception
+     * thrown within the handler itself.  It is dead code.
+     */
+
+    private void findDeadCatchers(byte[] code, TypedBlock[] blocks) throws BadBytecode {
+        int len = blocks.length;
+        for (int i = 0; i < len; i++) {
+            TypedBlock block = blocks[i];
+            if (block.localsTypes == null) { // if block is dead code
+                BasicBlock.Catch handler = block.toCatch;
+                while (handler != null)
+                    if (handler.body == block) {
+                        BasicBlock.Catch handler2
+                            = new BasicBlock.Catch(block, handler.typeIndex, null);
+                        traceException(code, handler2);
+                        break;
+                    }
+                    else
+                        handler = handler.next;
+            }
+        }
+    }
+
     // Phase 2
 
     /*
diff --git a/src/test/javassist/JvstTest4.java b/src/test/javassist/JvstTest4.java
index fe1ab7e8..c7582c34 100644
--- a/src/test/javassist/JvstTest4.java
+++ b/src/test/javassist/JvstTest4.java
@@ -866,7 +866,13 @@ public class JvstTest4 extends JvstTestRoot {
         String s2 = field2.getAnnotation(test4.JIRA181.Condition2.class).toString();
         assertEquals("@test4.JIRA181$Condition2(condition=test4.JIRA181<T>.B[].class)", s2);
     }
-}
-
-
 
+    public void testJIRA195() throws Exception {
+        CtClass cc = sloader.get("test4.JIRA195");
+        CtMethod mth = cc.getDeclaredMethod("test");
+        mth.getMethodInfo().rebuildStackMap(cc.getClassPool());
+        cc.writeFile();
+        Object obj = make(cc.getName());
+        assertEquals(4, invoke(obj, "run"));        
+    }
+}
-- 
2.39.5