More invalid pointer to pointer conversions.

As a follow up to:

  http://sourceware.org/ml/gdb-patches/2013-03/msg00449.html

In a nutshell, casts between 'char **' <-> 'unsigned char **' and
'char **' <-> 'const char **' are invalid.

I grepped for "\*\*) &" and found these.  There's another one in
demangle.c, but I've split fixing that one to a separate patch.

I think the ada_decode_symbol change is perhaps the one that could be
surprising.  The function's description has this comment, which makes
things much clearer:

   The GSYMBOL parameter is "mutable" in the C++ sense: logically
   const, but nevertheless modified to a semantically equivalent form
   when a decoded name is cached in it.  */

 const char *
 ada_decode_symbol (const struct general_symbol_info *gsymbol)

With that out of the way, I think the patch ends up being pretty
obvious.

Tested on x86_64 Fedora 17.

gdb/
2013-03-13  Pedro Alves  <palves@redhat.com>

	* ada-lang.c (ada_decode_symbol): Cast away constness of GSYMBOL
	rather than casting 'const char * const *' to 'const char **'.
	* ada-lex.l (processInt): Make "trailer" local const.  Remove
	'const char **' cast.
	* arm-linux-tdep.c (arm_stap_parse_special_token): Add 'char *'
	locals, and use those as strtol output pointer, instead than doing
	invalid casts to from 'const char **' to 'char **'.
	(_initialize_demangle): Remove cast.
	* i386-tdep.c (i386_stap_parse_special_token): : Add 'char *'
	locals, and use those as strtol output pointer, instead than doing
	invalid casts to from 'const char **' to 'char **'.
	* solib-dsbt.c (dsbt_get_initial_loadmaps): Remove 'gdb_byte**'
	casts.
	* stap-probe.c (stap_parse_register_operand)
	(stap_parse_single_operand): Likewise.

1 files changed, 17 insertions, 5 deletions

diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index 61ccc3e..e76dcbe 100644
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -3494,6 +3494,7 @@ i386_stap_parse_special_token (struct gdbarch *gdbarch,
 		  char *regname;
 		  int len;
 		  struct stoken str;
+		  char *endp;
 
 		  got_minus[0] = 0;
 		  if (*s == '+')
@@ -3504,7 +3505,8 @@ i386_stap_parse_special_token (struct gdbarch *gdbarch,
 		      got_minus[0] = 1;
 		    }
 
-		  displacements[0] = strtol (s, (char **) &s, 10);
+		  displacements[0] = strtol (s, &endp, 10);
+		  s = endp;
 
 		  if (*s != '+' && *s != '-')
 		    {
@@ -3521,7 +3523,8 @@ i386_stap_parse_special_token (struct gdbarch *gdbarch,
 		      got_minus[1] = 1;
 		    }
 
-		  displacements[1] = strtol (s, (char **) &s, 10);
+		  displacements[1] = strtol (s, &endp, 10);
+		  s = endp;
 
 		  if (*s != '+' && *s != '-')
 		    {
@@ -3538,7 +3541,8 @@ i386_stap_parse_special_token (struct gdbarch *gdbarch,
 		      got_minus[2] = 1;
 		    }
 
-		  displacements[2] = strtol (s, (char **) &s, 10);
+		  displacements[2] = strtol (s, &endp, 10);
+		  s = endp;
 
 		  if (*s != '(' || s[1] != '%')
 		    break;
@@ -3628,7 +3632,12 @@ i386_stap_parse_special_token (struct gdbarch *gdbarch,
 		    break;
 
 		  if (isdigit (*s))
-		    offset = strtol (s, (char **) &s, 10);
+		    {
+		      char *endp;
+
+		      offset = strtol (s, &endp, 10);
+		      s = endp;
+		    }
 
 		  if (*s != '(' || s[1] != '%')
 		    break;
@@ -3675,6 +3684,8 @@ i386_stap_parse_special_token (struct gdbarch *gdbarch,
 
 		  if (*s == ',')
 		    {
+		      char *endp;
+
 		      ++s;
 		      if (*s == '+')
 			++s;
@@ -3684,7 +3695,8 @@ i386_stap_parse_special_token (struct gdbarch *gdbarch,
 			  size_minus = 1;
 			}
 
-		      size = strtol (s, (char **) &s, 10);
+		      size = strtol (s, &endp, 10);
+		      s = endp;
 
 		      if (*s != ')')
 			break;