[PATCH 2/7] [D] libiberty: Fail if reached end of symbol string

[Iain Buclaw]

If a symbol that has so far been valid abruptly ends then we will want
to fail the process rather than silently succeed.

---
libiberty/ChangeLog

2015-05-13 Iain Buclaw  <ibuc...@gdcproject.org>

    * d-demangle.c (dlang_call_convention): Return NULL if have reached the
    end of the symbol, but expected more.
    (dlang_attributes): Likewise.
    (dlang_function_type): Likewise.
    (dlang_type): Likewise.
    (dlang_identifier): Likewise.
    (dlang_value): Likewise.

From e9806a182f8296d92a99d842edab6a4c29124eb1 Mon Sep 17 00:00:00 2001
From: Iain Buclaw <ibuc...@gdcproject.org>
Date: Wed, 13 May 2015 08:50:55 +0200
Subject: [PATCH 2/7] D demangle: Fail early on bad symbols

---
 libiberty/d-demangle.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/libiberty/d-demangle.c b/libiberty/d-demangle.c
index fa01767..91c6d55 100644
--- a/libiberty/d-demangle.c
+++ b/libiberty/d-demangle.c
@@ -185,7 +185,7 @@ static const char *
 dlang_call_convention (string *decl, const char *mangled)
 {
   if (mangled == NULL || *mangled == '\0')
-    return mangled;
+    return NULL;
 
   switch (*mangled)
     {
@@ -221,7 +221,7 @@ static const char *
 dlang_attributes (string *decl, const char *mangled)
 {
   if (mangled == NULL || *mangled == '\0')
-    return mangled;
+    return NULL;
 
   while (*mangled == 'N')
     {
@@ -280,7 +280,7 @@ dlang_function_type (string *decl, const char *mangled)
   size_t szattr, szargs, sztype;
 
   if (mangled == NULL || *mangled == '\0')
-    return mangled;
+    return NULL;
 
   /* The order of the mangled string is:
 	CallConvention FuncAttrs Arguments ArgClose Type
@@ -380,7 +380,7 @@ static const char *
 dlang_type (string *decl, const char *mangled)
 {
   if (mangled == NULL || *mangled == '\0')
-    return mangled;
+    return NULL;
 
   switch (*mangled)
     {
@@ -600,7 +600,7 @@ static const char *
 dlang_identifier (string *decl, const char *mangled)
 {
   if (mangled == NULL || *mangled == '\0')
-    return mangled;
+    return NULL;
 
   if (ISDIGIT (*mangled))
     {
@@ -1061,7 +1061,7 @@ static const char *
 dlang_value (string *decl, const char *mangled, const char *name, char type)
 {
   if (mangled == NULL || *mangled == '\0')
-    return mangled;
+    return NULL;
 
   switch (*mangled)
     {
-- 
2.1.0