[PATCH] sim: check asprintf return values

[Mike Frysinger <vapier at gentoo dot org>]

These are the last sources of build warnings (asprintf usage) that I see.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

2010-12-30  Mike Frysinger  <vapier@gentoo.org>

	* sim-module.c (sim_pre_argv_init): Return SIM_RC_FAIL when asprintf
	fails.
	* sim-options.c (sim_parse_args): Issue an error and return SIM_RC_FAIL
	when asprintf fails.
	* sim-utils.c (sim_do_commandf): Issue an error and return when
	asprintf fails.
	* sim-watch.c (sim_watchpoint_install): Return SIM_RC_FAIL when
	asprintf fails.
---
 sim/common/sim-module.c  |    3 ++-
 sim/common/sim-options.c |    7 ++++++-
 sim/common/sim-utils.c   |    7 ++++++-
 sim/common/sim-watch.c   |    7 ++++---
 4 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/sim/common/sim-module.c b/sim/common/sim-module.c
index 0180d07..1c48b29 100644
--- a/sim/common/sim-module.c
+++ b/sim/common/sim-module.c
@@ -88,7 +88,8 @@ sim_pre_argv_init (SIM_DESC sd, const char *myname)
     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
       {
 	char *name;
-	asprintf (&name, "cpu%d", i);
+	if (asprintf (&name, "cpu%d", i) < 0)
+	  return SIM_RC_FAIL;
 	CPU_NAME (STATE_CPU (sd, i)) = name;
       }
   }
diff --git a/sim/common/sim-options.c b/sim/common/sim-options.c
index c01cce5..2df91e3 100644
--- a/sim/common/sim-options.c
+++ b/sim/common/sim-options.c
@@ -621,7 +621,12 @@ sim_parse_args (SIM_DESC sd, char **argv)
 		char *name;
 		*lp = opt->opt;
 		/* Prepend --<cpuname>- to the option.  */
-		asprintf (&name, "%s-%s", CPU_NAME (cpu), lp->name);
+		if (asprintf (&name, "%s-%s", CPU_NAME (cpu), lp->name) < 0)
+		  {
+		    sim_io_eprintf (sd, "internal error, out of memory");
+		    result = SIM_RC_FAIL;
+		    break;
+		  }
 		lp->name = name;
 		/* Dynamically assign `val' numbers for long options. */
 		lp->val = i++;
diff --git a/sim/common/sim-utils.c b/sim/common/sim-utils.c
index 9f9104e..a50358a 100644
--- a/sim/common/sim-utils.c
+++ b/sim/common/sim-utils.c
@@ -336,7 +336,12 @@ sim_do_commandf (SIM_DESC sd,
   va_list ap;
   char *buf;
   va_start (ap, fmt);
-  vasprintf (&buf, fmt, ap);
+  if (vasprintf (&buf, fmt, ap) < 0)
+    {
+      sim_io_eprintf (sd, "%s: asprintf failed for `%s'\n",
+		      STATE_MY_NAME (sd), fmt);
+      return;
+    }
   sim_do_command (sd, buf);
   va_end (ap);
   free (buf);
diff --git a/sim/common/sim-watch.c b/sim/common/sim-watch.c
index 1bf2703..c1d33be 100644
--- a/sim/common/sim-watch.c
+++ b/sim/common/sim-watch.c
@@ -411,9 +411,10 @@ sim_watchpoint_install (SIM_DESC sd)
 	    char *name;
 	    int nr = interrupt_nr * nr_watchpoint_types + type;
 	    OPTION *option = &int_options[nr];
-	    asprintf (&name, "watch-%s-%s",
-		      watchpoint_type_to_str (sd, type),
-		      interrupt_nr_to_str (sd, interrupt_nr));
+	    if (asprintf (&name, "watch-%s-%s",
+			  watchpoint_type_to_str (sd, type),
+			  interrupt_nr_to_str (sd, interrupt_nr)) < 0)
+	      return SIM_RC_FAIL;
 	    option->opt.name = name;
 	    option->opt.has_arg = required_argument;
 	    option->opt.val = type_to_option (sd, type, interrupt_nr);
-- 
1.7.3.1