Bug 6176 - Fix race condition

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@9156 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_macro.c

@@ -104,7 +104,7 @@ static int macro_exec(struct ast_channel *chan, void *data)
 	char *offsets;
 	int offset, depth;
 	int setmacrocontext=0;
-	int autoloopflag;
+	int autoloopflag, dead = 0;
   
 	char *save_macro_exten;
 	char *save_macro_context;
@@ -231,6 +231,7 @@ static int macro_exec(struct ast_channel *chan, void *data)
 					ast_log(LOG_DEBUG, "Spawn extension (%s,%s,%d) exited non-zero on '%s' in macro '%s'\n", chan->context, chan->exten, chan->priority, chan->name, macro);
 				else if (option_verbose > 1)
 					ast_verbose( VERBOSE_PREFIX_2 "Spawn extension (%s, %s, %d) exited non-zero on '%s' in macro '%s'\n", chan->context, chan->exten, chan->priority, chan->name, macro);
+				dead = 1;
 				goto out;
 			}
 		}
@@ -250,37 +251,44 @@ static int macro_exec(struct ast_channel *chan, void *data)
 	out:
 	/* Reset the depth back to what it was when the routine was entered (like if we called Macro recursively) */
 	snprintf(depthc, sizeof(depthc), "%d", depth);
+	if (!dead) {
 		pbx_builtin_setvar_helper(chan, "MACRO_DEPTH", depthc);
 
 		ast_set2_flag(chan, autoloopflag, AST_FLAG_IN_AUTOLOOP);
+	}
+
   	for (x = 1; x < argc; x++) {
   		/* Restore old arguments and delete ours */
 		snprintf(varname, sizeof(varname), "ARG%d", x);
   		if (oldargs[x]) {
+			if (!dead)
 				pbx_builtin_setvar_helper(chan, varname, oldargs[x]);
 			free(oldargs[x]);
-		} else {
+		} else if (!dead) {
 			pbx_builtin_setvar_helper(chan, varname, NULL);
 		}
   	}
 
 	/* Restore macro variables */
+	if (!dead) {
 		pbx_builtin_setvar_helper(chan, "MACRO_EXTEN", save_macro_exten);
+		pbx_builtin_setvar_helper(chan, "MACRO_CONTEXT", save_macro_context);
+		pbx_builtin_setvar_helper(chan, "MACRO_PRIORITY", save_macro_priority);
+	}
 	if (save_macro_exten)
 		free(save_macro_exten);
-	pbx_builtin_setvar_helper(chan, "MACRO_CONTEXT", save_macro_context);
 	if (save_macro_context)
 		free(save_macro_context);
-	pbx_builtin_setvar_helper(chan, "MACRO_PRIORITY", save_macro_priority);
 	if (save_macro_priority)
 		free(save_macro_priority);
-	if (setmacrocontext) {
+
+	if (!dead && setmacrocontext) {
 		chan->macrocontext[0] = '\0';
 		chan->macroexten[0] = '\0';
 		chan->macropriority = 0;
 	}
 
-	if (!strcasecmp(chan->context, fullmacro)) {
+	if (!dead && !strcasecmp(chan->context, fullmacro)) {
   		/* If we're leaving the macro normally, restore original information */
 		chan->priority = oldpriority;
 		ast_copy_string(chan->context, oldcontext, sizeof(chan->context));
@@ -299,6 +307,7 @@ static int macro_exec(struct ast_channel *chan, void *data)
 		}
 	}
 
+	if (!dead)
 		pbx_builtin_setvar_helper(chan, "MACRO_OFFSET", save_macro_offset);
 	if (save_macro_offset)
 		free(save_macro_offset);