constify to_attach

This constifies the "args" argument to the target_ops to_attach
method.

I updated all instances of the method.  I could not compile all of
them but I hand-inspected them.  In all cases either the argument is
ignored, or it is passed to parse_pid_to_attach.  (linux-nat does some
extra stuff, but that one I built...)

If you want to try it on your host of choice, please do so.

The code in parse_pid_to_attach seems a little bogus to me.  If there
is a platform with a broken strtoul, we have better methods for fixing
the issue now.  However, I left the code as is since it is clearly ok
to do so.

Built and regtested on x86-64 Fedora 20.

2014-06-04  Tom Tromey  <tromey@redhat.com>

	* procfs.c (procfs_attach): Make "args" const.
	* windows-nat.c (windows_attach): Make "args" const.
	* nto-procfs.c (procfs_attach): Make "args" const.
	* inf-ttrace.c (inf_ttrace_attach): Make "args" const.
	* go32-nat.c (go32_attach): Make "args" const.
	* gnu-nat.c (gnu_attach): Make "args" const.
	* darwin-nat.c (darwin_attach): Make "args" const.
	* inf-ptrace.c (inf_ptrace_attach): Make "args" const.
	* linux-nat.c (linux_nat_attach): Make "args" const.
	* remote.c (extended_remote_attach_1, extended_remote_attach):
	Make "args" const.
	* target.h (struct target_ops) <to_attach>: Make "args" const.
	(find_default_attach): Likewise.
	* utils.c (parse_pid_to_attach): Make "args" const.
	* utils.h (parse_pid_to_attach): Update.

14 files changed, 36 insertions, 17 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 8698393..8e48f1f 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,23 @@
 2014-06-04  Tom Tromey  <tromey@redhat.com>
 
+	* procfs.c (procfs_attach): Make "args" const.
+	* windows-nat.c (windows_attach): Make "args" const.
+	* nto-procfs.c (procfs_attach): Make "args" const.
+	* inf-ttrace.c (inf_ttrace_attach): Make "args" const.
+	* go32-nat.c (go32_attach): Make "args" const.
+	* gnu-nat.c (gnu_attach): Make "args" const.
+	* darwin-nat.c (darwin_attach): Make "args" const.
+	* inf-ptrace.c (inf_ptrace_attach): Make "args" const.
+	* linux-nat.c (linux_nat_attach): Make "args" const.
+	* remote.c (extended_remote_attach_1, extended_remote_attach):
+	Make "args" const.
+	* target.h (struct target_ops) <to_attach>: Make "args" const.
+	(find_default_attach): Likewise.
+	* utils.c (parse_pid_to_attach): Make "args" const.
+	* utils.h (parse_pid_to_attach): Update.
+
+2014-06-04  Tom Tromey  <tromey@redhat.com>
+
 	* target-delegates.c: Rebuild.
 	* target.c (default_thread_address_space): New function.
 	(target_thread_address_space): Simplify.
diff --git a/gdb/darwin-nat.c b/gdb/darwin-nat.c
index 160329b..5714288 100644
--- a/gdb/darwin-nat.c
+++ b/gdb/darwin-nat.c
@@ -1672,7 +1672,7 @@ darwin_setup_fake_stop_event (struct inferior *inf)
 /* Attach to process PID, then initialize for debugging it
    and wait for the trace-trap that results from attaching.  */
 static void
-darwin_attach (struct target_ops *ops, char *args, int from_tty)
+darwin_attach (struct target_ops *ops, const char *args, int from_tty)
 {
   pid_t pid;
   pid_t pid2;
diff --git a/gdb/gnu-nat.c b/gdb/gnu-nat.c
index 516e83d..176f4a1 100644
--- a/gdb/gnu-nat.c
+++ b/gdb/gnu-nat.c
@@ -2165,7 +2165,7 @@ gnu_create_inferior (struct target_ops *ops,
 /* Attach to process PID, then initialize for debugging it
    and wait for the trace-trap that results from attaching.  */
 static void
-gnu_attach (struct target_ops *ops, char *args, int from_tty)
+gnu_attach (struct target_ops *ops, const char *args, int from_tty)
 {
   int pid;
   char *exec_file;
diff --git a/gdb/go32-nat.c b/gdb/go32-nat.c
index d614911..89157d3 100644
--- a/gdb/go32-nat.c
+++ b/gdb/go32-nat.c
@@ -340,7 +340,7 @@ static struct {
 };
 
 static void
-go32_attach (struct target_ops *ops, char *args, int from_tty)
+go32_attach (struct target_ops *ops, const char *args, int from_tty)
 {
   error (_("\
 You cannot attach to a running program on this platform.\n\
diff --git a/gdb/inf-ptrace.c b/gdb/inf-ptrace.c
index 4736fbd..e1d64f8 100644
--- a/gdb/inf-ptrace.c
+++ b/gdb/inf-ptrace.c
@@ -181,7 +181,7 @@ inf_ptrace_mourn_inferior (struct target_ops *ops)
    be chatty about it.  */
 
 static void
-inf_ptrace_attach (struct target_ops *ops, char *args, int from_tty)
+inf_ptrace_attach (struct target_ops *ops, const char *args, int from_tty)
 {
   char *exec_file;
   pid_t pid;
diff --git a/gdb/inf-ttrace.c b/gdb/inf-ttrace.c
index ee55515..a7c3481 100644
--- a/gdb/inf-ttrace.c
+++ b/gdb/inf-ttrace.c
@@ -747,7 +747,7 @@ inf_ttrace_create_threads_after_attach (int pid)
 }
 
 static void
-inf_ttrace_attach (struct target_ops *ops, char *args, int from_tty)
+inf_ttrace_attach (struct target_ops *ops, const char *args, int from_tty)
 {
   char *exec_file;
   pid_t pid;
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 3f6e5ea..6ca5c7e 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -1301,7 +1301,7 @@ linux_nat_create_inferior (struct target_ops *ops,
 }
 
 static void
-linux_nat_attach (struct target_ops *ops, char *args, int from_tty)
+linux_nat_attach (struct target_ops *ops, const char *args, int from_tty)
 {
   struct lwp_info *lp;
   int status;
diff --git a/gdb/nto-procfs.c b/gdb/nto-procfs.c
index 2ce9563..728d6f3 100644
--- a/gdb/nto-procfs.c
+++ b/gdb/nto-procfs.c
@@ -602,7 +602,7 @@ procfs_files_info (struct target_ops *ignore)
 
 /* Attach to process PID, then initialize for debugging it.  */
 static void
-procfs_attach (struct target_ops *ops, char *args, int from_tty)
+procfs_attach (struct target_ops *ops, const char *args, int from_tty)
 {
   char *exec_file;
   int pid;
diff --git a/gdb/procfs.c b/gdb/procfs.c
index cd3301a..6a2aef8 100644
--- a/gdb/procfs.c
+++ b/gdb/procfs.c
@@ -110,7 +110,7 @@
 
 /* This module defines the GDB target vector and its methods.  */
 
-static void procfs_attach (struct target_ops *, char *, int);
+static void procfs_attach (struct target_ops *, const char *, int);
 static void procfs_detach (struct target_ops *, const char *, int);
 static void procfs_resume (struct target_ops *,
 			   ptid_t, int, enum gdb_signal);
@@ -3039,7 +3039,7 @@ procfs_debug_inferior (procinfo *pi)
 }
 
 static void
-procfs_attach (struct target_ops *ops, char *args, int from_tty)
+procfs_attach (struct target_ops *ops, const char *args, int from_tty)
 {
   char *exec_file;
   int   pid;
diff --git a/gdb/remote.c b/gdb/remote.c
index 6774d84..8f9478c 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -4365,7 +4365,8 @@ remote_disconnect (struct target_ops *target, char *args, int from_tty)
    be chatty about it.  */
 
 static void
-extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
+extended_remote_attach_1 (struct target_ops *target, const char *args,
+			  int from_tty)
 {
   struct remote_state *rs = get_remote_state ();
   int pid;
@@ -4478,7 +4479,7 @@ extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
 }
 
 static void
-extended_remote_attach (struct target_ops *ops, char *args, int from_tty)
+extended_remote_attach (struct target_ops *ops, const char *args, int from_tty)
 {
   extended_remote_attach_1 (ops, args, from_tty);
 }
diff --git a/gdb/target.h b/gdb/target.h
index b0b9e89..cd5a799 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -409,7 +409,7 @@ struct target_ops
        for normal operations, and should be ready to deliver the
        status of the process immediately (without waiting) to an
        upcoming target_wait call.  */
-    void (*to_attach) (struct target_ops *ops, char *, int);
+    void (*to_attach) (struct target_ops *ops, const char *, int);
     void (*to_post_attach) (struct target_ops *, int)
       TARGET_DEFAULT_IGNORE ();
     void (*to_detach) (struct target_ops *ops, const char *, int)
@@ -2140,7 +2140,7 @@ extern void noprocess (void) ATTRIBUTE_NORETURN;
 
 extern void target_require_runnable (void);
 
-extern void find_default_attach (struct target_ops *, char *, int);
+extern void find_default_attach (struct target_ops *, const char *, int);
 
 extern void find_default_create_inferior (struct target_ops *,
 					  char *, char *, char **, int);
diff --git a/gdb/utils.c b/gdb/utils.c
index 86df1c7..6e8f384 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -3255,7 +3255,7 @@ gdb_bfd_errmsg (bfd_error_type error_tag, char **matching)
 /* Return ARGS parsed as a valid pid, or throw an error.  */
 
 int
-parse_pid_to_attach (char *args)
+parse_pid_to_attach (const char *args)
 {
   unsigned long pid;
   char *dummy;
@@ -3263,7 +3263,7 @@ parse_pid_to_attach (char *args)
   if (!args)
     error_no_arg (_("process-id to attach"));
 
-  dummy = args;
+  dummy = (char *) args;
   pid = strtoul (args, &dummy, 0);
   /* Some targets don't set errno on errors, grrr!  */
   if ((pid == 0 && dummy == args) || dummy != &args[strlen (args)])
diff --git a/gdb/utils.h b/gdb/utils.h
index 33371ac..0eba8ae 100644
--- a/gdb/utils.h
+++ b/gdb/utils.h
@@ -63,7 +63,7 @@ struct timeval get_prompt_for_continue_wait_time (void);
 
 /* Parsing utilites.  */
 
-extern int parse_pid_to_attach (char *args);
+extern int parse_pid_to_attach (const char *args);
 
 extern int parse_escape (struct gdbarch *, const char **);
 
diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index 16f4efb..e912fa4 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -1834,7 +1834,7 @@ out:
 
 /* Attach to process PID, then initialize for debugging it.  */
 static void
-windows_attach (struct target_ops *ops, char *args, int from_tty)
+windows_attach (struct target_ops *ops, const char *args, int from_tty)
 {
   BOOL ok;
   DWORD pid;