sim: standardize sim_create_inferior handling of argv a bit more

For targets that process argv in sim_create_inferior, improve the code:
- provide more details in the comment
- make the check for when to re-init more robust
- clean out legacy sim_copy_argv code

This will be cleaned up more in the future when we have a common inferior
creation function, but at least help new ports get it right until then.

2 files changed, 9 insertions, 4 deletions

diff --git a/sim/bfin/ChangeLog b/sim/bfin/ChangeLog
index 744f5eb..6717fcc 100644
--- a/sim/bfin/ChangeLog
+++ b/sim/bfin/ChangeLog
@@ -1,3 +1,7 @@
+2015-12-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* interp.c (sim_create_inferior): Update comment and argv check.
+
 2015-12-25  Mike Frysinger  <vapier@gentoo.org>
 
 	* Makefile.in (SIM_OBJS): Delete sim-model.o.
diff --git a/sim/bfin/interp.c b/sim/bfin/interp.c
index 5ba204b..2da70b5 100644
--- a/sim/bfin/interp.c
+++ b/sim/bfin/interp.c
@@ -1210,10 +1210,11 @@ sim_create_inferior (SIM_DESC sd, struct bfd *abfd,
     addr = 0;
   sim_pc_set (cpu, addr);
 
-  /* Standalone mode (i.e. `bfin-...-run`) will take care of the argv
-     for us in sim_open() -> sim_parse_args().  But in debug mode (i.e.
-     'target sim' with `bfin-...-gdb`), we need to handle it.  */
-  if (STATE_OPEN_KIND (sd) == SIM_OPEN_DEBUG)
+  /* Standalone mode (i.e. `run`) will take care of the argv for us in
+     sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
+     with `gdb`), we need to handle it because the user can change the
+     argv on the fly via gdb's 'run'.  */
+  if (STATE_PROG_ARGV (sd) != argv)
     {
       freeargv (STATE_PROG_ARGV (sd));
       STATE_PROG_ARGV (sd) = dupargv (argv);