GT-3481 - Gnu Demangler - Updated v2.24 to use prevent known

segmentation fault

GPL/DemanglerGnu/build.gradle

@@ -146,6 +146,7 @@ model {
 		
 			if (version.equals(v33_1)) {
 				if (toolChain in Gcc) {							
+					//cCompiler.args "-DCP_DEMANGLE_DEBUG"
 					cCompiler.args "-DHAVE_STDLIB_H"
 					cCompiler.args "-DHAVE_STRING_H"
 				}

GPL/DemanglerGnu/src/demangler_gnu_v2_24/c/cp-demangle.c

@@ -33,7 +33,9 @@
 
 
    					CHANGE NOTICE:
-		This file was changed on July 22nd, 2020.
+		This file was changed on July 22nd, 2020
+		This file was changed on Jan 22, 2020
+			- Added a method to wrap calls to d_print_comp() in order to track too much recursion
 */
 
 /* This code implements a demangler for the g++ V3 ABI.  The ABI is
@@ -309,6 +311,11 @@ struct d_print_info
   int pack_index;
   /* Number of d_print_flush calls so far.  */
   unsigned long int flush_count;
+  
+	// Changed Jan 22, 2020 - Added a method to wrap calls to d_print_comp() in
+	//                        order to track too much recursion
+  int recursion_level;
+  
 };
 
 #ifdef CP_DEMANGLE_DEBUG
@@ -467,6 +474,12 @@ static inline char d_last_char (struct d_print_info *);
 static void
 d_print_comp (struct d_print_info *, int, const struct demangle_component *);
 
+// Changed Jan 22, 2020 - Added a method to wrap calls to d_print_comp() in
+//                        order to track too much recursion
+static void
+d_print_comp_delegate (struct d_print_info *, int, const struct demangle_component *);
+
+
 static void
 d_print_java_identifier (struct d_print_info *, const char *, int);
 
@@ -3667,6 +3680,7 @@ static void
 d_print_init (struct d_print_info *dpi, demangle_callbackref callback,
 	      void *opaque)
 {
+
   dpi->len = 0;
   dpi->last_char = '\0';
   dpi->templates = NULL;
@@ -3678,6 +3692,10 @@ d_print_init (struct d_print_info *dpi, demangle_callbackref callback,
   dpi->opaque = opaque;
 
   dpi->demangle_failure = 0;
+  
+	// Changed Jan 22, 2020 - Added a method to wrap calls to d_print_comp() in
+	//                        order to track too much recursion
+  dpi->recursion_level = 0;
 }
 
 /* Indicate that an error occurred during printing, and test for error.  */
@@ -3928,10 +3946,28 @@ d_print_subexpr (struct d_print_info *dpi, int options,
 
 /* Subroutine to handle components.  */
 
+	// Changed Jan 22, 2020 - Added a method to wrap calls to d_print_comp() in
+	//                        order to track too much recursion
 static void
 d_print_comp (struct d_print_info *dpi, int options,
               const struct demangle_component *dc)
 {
+
+	if (dpi->recursion_level > DEMANGLE_RECURSION_LIMIT) {
+		d_print_error (dpi);
+		return;
+	}
+
+	dpi->recursion_level++;
+	d_print_comp_delegate(dpi, options, dc);	
+	dpi->recursion_level--;
+	
+}
+
+static void
+d_print_comp_delegate (struct d_print_info *dpi, int options,
+              const struct demangle_component *dc)
+{
   /* Magic variable to let reference smashing skip over the next modifier
      without needing to modify *dc.  */
   const struct demangle_component *mod_inner = NULL;

GPL/DemanglerGnu/src/demangler_gnu_v2_24/headers/demangle.h

@@ -1,6 +1,5 @@
 /* ###
  * IP: LGPL 3.0
- * REVIEWED: YES
  */
 /* Defs for interface to demanglers.
    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002,
@@ -71,6 +70,9 @@ extern "C" {
 /* If none of these are set, use 'current_demangling_style' as the default. */
 #define DMGL_STYLE_MASK (DMGL_AUTO|DMGL_GNU|DMGL_LUCID|DMGL_ARM|DMGL_HP|DMGL_EDG|DMGL_GNU_V3|DMGL_JAVA|DMGL_GNAT)
 
+// Changed Jan 22, 2020 - Added constant to allow us to limit degenerate recursive calls
+#define DEMANGLE_RECURSION_LIMIT 10000
+
 /* Enumeration of possible demangling styles.
 
    Lucid and ARM styles are still kept logically distinct, even though