GhiHorn improvements

Author: sei-eschwartz

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Current Release
 
+## 231201
+
+- Improvements:
+* Improve HighCfg entry node heuristic
+* Add additional logging when failing to create decompiler
+* Ensure that start and goal addresses are valid instructions
+
 ## 231003
 
 - Improvements:

src/main/java/kaiju/tools/ghihorn/decompiler/DecompilerFactory.java

@@ -32,7 +32,7 @@ public DecompInterface createDecompiler() {
                 options.grabFromToolAndProgram(null, opt, program);
 			} catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException | IllegalArgumentException
 					| InvocationTargetException | SecurityException e) {
-				throw new RuntimeException("Unable to create decompiler");
+				throw new RuntimeException("Unable to create decompiler: " + e.toString(), e);
 			}
 
             decompiler.setOptions(options);

src/main/java/kaiju/tools/ghihorn/tools/pathanalyzer/PathAnalyzerController.java

@@ -14,6 +14,7 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Consumer;
 import java.util.stream.Collectors;
 import javax.swing.BorderFactory;
 import javax.swing.JCheckBox;
@@ -415,11 +416,16 @@ public List<Map<String, Object>> getCommandParameters() throws Exception {
         final Address endAddr = program.getAddressFactory().getDefaultAddressSpace()
                 .getAddress(goalAddrText.getText());
 
-        // Make sure that the program contains the specified addresses
-        if (!program.getMemory().contains(startAddr)
-                || !program.getMemory().contains(endAddr)) {
-            throw new RuntimeException();
-        }
+        // Make sure that the program contains the specified addresses as instructions
+        Consumer<Address> verifyAddress = (Address addr) -> {
+            if (program.getListing().getInstructionAt(addr) == null) {
+                throw new RuntimeException("Start or goal address " + addr + " is not an instruction");
+            };
+        };
+
+        verifyAddress.accept(startAddr);
+        verifyAddress.accept(endAddr);
+
         this.startAddrText.setText(startAddr.toString());
 
         status("Looking for path from " + startAddr + " to " + endAddr);