GP-7291 - Gnu Demangler - Changed name of global initialization

functions

Ghidra/Features/Base/src/main/java/ghidra/app/util/demangler/MangledContext.java

@@ -17,6 +17,7 @@ package ghidra.app.util.demangler;
 
 import java.util.Objects;
 
+import generic.json.Json;
 import ghidra.program.model.address.Address;
 import ghidra.program.model.listing.Program;
 
@@ -77,4 +78,8 @@ public class MangledContext {
 		return address;
 	}
 
+	@Override
+	public String toString() {
+		return Json.toString(this);
+	}
 }

Ghidra/Features/GnuDemangler/src/main/java/ghidra/app/util/demangler/gnu/GnuDemangler.java

@@ -120,12 +120,13 @@ public class GnuDemangler implements Demangler {
 			DemangledObject demangledObject =
 				parse(originalMangled, process, demangled, options);
 			if (demangledObject == null) {
-				return demangledObject;
+				return null;
 			}
 
 			if (globalPrefix != null) {
+				String prefix = translateGlobalPrefix(globalPrefix);
 				DemangledFunction dfunc = new DemangledFunction(originalMangled, demangled,
-					globalPrefix + demangledObject.getName());
+					prefix + demangledObject.getName());
 				dfunc.setNamespace(demangledObject.getNamespace());
 				demangledObject = dfunc;
 			}
@@ -152,6 +153,17 @@ public class GnuDemangler implements Demangler {
 		}
 	}
 
+	private String translateGlobalPrefix(String globalPrefix) {
+
+		return switch (globalPrefix) {
+			case "_GLOBAL__sub_I_" -> "global_init_constructor_";
+			case "_GLOBAL__sub_D_" -> "global_destructor_";
+			// case "_GLOBAL__N_" // anonymous namespace; only seen inside mangled text 
+			// case "_GLOBAL__sub_G__" // debugging info; not seen in the wild
+			default -> globalPrefix;
+		};
+	}
+
 	private GnuDemanglerOptions getGnuOptions(DemanglerOptions options) {
 
 		if (options instanceof GnuDemanglerOptions) {

Ghidra/Features/GnuDemangler/src/main/java/ghidra/app/util/demangler/gnu/GnuDemanglerOptions.java

@@ -15,6 +15,7 @@
  */
 package ghidra.app.util.demangler.gnu;
 
+import generic.json.Json;
 import ghidra.app.util.demangler.DemanglerOptions;
 
 /**
@@ -83,7 +84,7 @@ public class GnuDemanglerOptions extends DemanglerOptions {
 	public GnuDemanglerOptions(GnuDemanglerFormat format, boolean isDeprecated) {
 		this(format, isDeprecated, GnuDemanglerOptions.DEFAULT_TIMEOUT_SECONDS);
 	}
-	
+
 	/**
 	 * Constructor to specify the format to use, whether to prefer the deprecated format when
 	 * both deprecated and modern are available, and the timeout
@@ -219,16 +220,6 @@ public class GnuDemanglerOptions extends DemanglerOptions {
 
 	@Override
 	public String toString() {
-		//@formatter:off
-		return "{\n" +
-			"\tdoDisassembly: " + doDisassembly() + ",\n" +
-			"\tapplySignature: " + applySignature() + ",\n" +
-			"\tuseStandardReplacements: " + useStandardReplacements + ",\n" +
-			"\tdemangleOnlyKnownPatterns: " + demangleOnlyKnownPatterns() + ",\n" +
-			"\ttimeout (sec): " + timeout + ",\n" +
-			"\tdemanglerName: " + getDemanglerName() + ",\n" +
-			"\tdemanglerApplicationArguments: " + getDemanglerApplicationArguments() + ",\n" +
-		"}";
-		//@formatter:on
+		return Json.toString(this);
 	}
 }

Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/GnuDemanglerParserTest.java

@@ -1410,7 +1410,7 @@ public class GnuDemanglerParserTest extends AbstractGenericTest {
 
 		//
 		//
-		// Mangled: _ZN12_GLOBAL__N_120decode_charset_iconvEPKc
+		// Mangled: _ZNK17GCC_IndicationPDUcvRK31GCC_ApplicationInvokeIndicationEv
 		//
 		// Demangled: GCC_IndicationPDU::operator GCC_ApplicationInvokeIndication const&() const
 		//

Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/gnu/GnuDemanglerTest.java

@@ -150,7 +150,9 @@ public class GnuDemanglerTest extends AbstractGenericTest {
 
 		GnuDemanglerOptions options = new GnuDemanglerOptions();
 		options.setUseStandardReplacements(true);
-		DemangledFunction dobj = (DemangledFunction) demangler.demangle(mangled, options);
+		MangledContext context = new MangledContext(program, options, mangled, null);
+
+		DemangledFunction dobj = (DemangledFunction) demangler.demangle(context);
 		assertNotNull(dobj);
 
 		String signature = dobj.getSignature();
@@ -172,7 +174,8 @@ public class GnuDemanglerTest extends AbstractGenericTest {
 		// Now disable demangled string replacement
 		// 
 		options.setUseStandardReplacements(false);
-		dobj = (DemangledFunction) demangler.demangle(mangled, options);
+		context = new MangledContext(program, options, mangled, null);
+		dobj = (DemangledFunction) demangler.demangle(context);
 		assertNotNull(dobj);
 
 		String fullSignature = dobj.getSignature();
@@ -233,6 +236,29 @@ public class GnuDemanglerTest extends AbstractGenericTest {
 		assertTrue(d.isPointer());
 	}
 
+	@Test
+	public void testGlobalInitializationFunction() throws Exception {
+
+		/*
+		 	Mangled: _GLOBAL__sub_I__ZN6ghidra8ATTRIB_AE
+		 	
+		 	We parse this as a  DemangledVariable.    We then us the '_GLOBAL__sub_I_' prefix as 
+		 	a signal that the symbol represents a global initialization constructor.  We then 
+		 	convert the variable to a DemangledFunction.
+		 	
+		 	Signature: ghidra::global_init_constructor_ATTRIB_A(void)
+		 	
+		 */
+
+		String mangled = "_GLOBAL__sub_I__ZN6ghidra8ATTRIB_AE";
+
+		GnuDemangler demangler = new GnuDemangler();
+		DemangledFunction obj = (DemangledFunction) demangler.demangle(mangled);
+
+		String signature = obj.getSignature();
+		assertEquals("ghidra::global_init_constructor_ATTRIB_A(void)", signature);
+	}
+
 	@Test
 	public void testDemangleTypeInfoName() throws Exception {