plain underscore prefixes were causing issues with built-in signatures

src/main/java/wasm/WasmLoader.java

@@ -165,14 +165,14 @@ private String getMethodName(WasmNameSection names, WasmExportSection exports, i
 		if(names != null) {
 			String name = names.getFunctionName(id);
 			if(name != null) {
-				return "_" + name;
+				return "wasm_" + name;
 			}
 		}
 
 		if(exports != null) {
 			WasmExportEntry entry = exports.findMethod(id);
 			if (entry != null) {
-				return "_" + entry.getName();
+				return "export_" + entry.getName();
 			}
 		}
 		return "unnamed_function_" + id;

src/main/java/wasm/analysis/WasmAnalysis.java

@@ -26,13 +26,14 @@
 import wasm.format.sections.structures.WasmImportEntry;
 
 public class WasmAnalysis {
-	private static HashMap<Program, WasmAnalysis> states = new HashMap<>();
+	private static HashMap<String, WasmAnalysis> states = new HashMap<>();
 	public static WasmAnalysis getState(Program p) {
-		if(!states.containsKey(p)) {
+		String key = p.getExecutableSHA256();
+		if(!states.containsKey(key)) {
 			System.out.println("Creating new analysis state for "+p.getName());
-			states.put(p, new WasmAnalysis(p));
+			states.put(key, new WasmAnalysis(p));
 		}
-		return states.get(p);
+		return states.get(key);
 	}
 
 	private Program program;

src/main/java/wasm/analysis/WasmFunctionAnalysis.java

@@ -42,6 +42,10 @@ public WasmFunctionAnalysis(WasmAnalysis parent, Function f) {
 
 	}
 
+	public Function getFunction() {
+		return function;
+	}
+
 	public void collectMeta(MetaInstruction meta) {
 		metas.add(meta);
 	}
@@ -132,10 +136,7 @@ public void performResolution() {
 			case RETURN:
 				if(valueStackDepth != 0) {
 					if(valueStackDepth != 1) {
-						for(MetaInstruction meta: metas) {
-							System.out.println(meta);
-						}
-						throw new RuntimeException("Too many items on stack at return");
+						throw new RuntimeException("Too many items on stack at return (entry point " + function.getEntryPoint() + ")");
 					}
 					ReturnMetaInstruction ret = (ReturnMetaInstruction) instr;
 					ret.returnsVal = true;