# HG changeset patch
# User gziemski
# Date 1465498035 18000
# Node ID 1a0ba4f95383d42d59d21f9525d74e561004fea5
# Parent  0eafa245fd9ad6d0c760d2d947da6280d447735e
8155968: Update command line options
Reviewed-by: gthornbr, hseigel, mschoene
Contributed-by: gerard.ziemski@oracle.com

diff -r 0eafa245fd9a -r 1a0ba4f95383 hotspot/src/share/vm/runtime/arguments.cpp
--- a/hotspot/src/share/vm/runtime/arguments.cpp	Thu May 12 17:37:45 2016 -0400
+++ b/hotspot/src/share/vm/runtime/arguments.cpp	Thu Jun 09 13:47:15 2016 -0500
@@ -794,9 +794,10 @@
   } else if (new_len == 0) {
     value = old_value;
   } else {
-    char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtArguments);
+     size_t length = old_len + 1 + new_len + 1;
+     char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
     // each new setting adds another LINE to the switch:
-    sprintf(buf, "%s\n%s", old_value, new_value);
+    jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
     value = buf;
     free_this_too = buf;
   }
@@ -1014,15 +1015,17 @@
   if (args == NULL || count == 0) {
     return NULL;
   }
-  size_t length = strlen(args[0]) + 1; // add 1 for the null terminator
-  for (int i = 1; i < count; i++) {
-    length += strlen(args[i]) + 1; // add 1 for a space
+  size_t length = 0;
+  for (int i = 0; i < count; i++) {
+    length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
   }
   char* s = NEW_RESOURCE_ARRAY(char, length);
-  strcpy(s, args[0]);
-  for (int j = 1; j < count; j++) {
-    strcat(s, " ");
-    strcat(s, args[j]);
+  char* dst = s;
+  for (int j = 0; j < count; j++) {
+    size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
+    jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
+    dst += offset;
+    length -= offset;
   }
   return (const char*) s;
 }
@@ -1106,9 +1109,8 @@
   // Only make the obsolete check for valid arguments.
   if (arg_len <= BUFLEN) {
     // Construct a string which consists only of the argument name without '+', '-', or '='.
-    char stripped_argname[BUFLEN+1];
-    strncpy(stripped_argname, argname, arg_len);
-    stripped_argname[arg_len] = '\0';  // strncpy may not null terminate.
+    char stripped_argname[BUFLEN+1]; // +1 for '\0'
+    jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
     if (is_obsolete_flag(stripped_argname, &since)) {
       char version[256];
       since.to_string(version, sizeof(version));
@@ -1260,8 +1262,7 @@
     size_t key_len = eq - prop;
     char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
 
-    strncpy(tmp_key, prop, key_len);
-    tmp_key[key_len] = '\0';
+    jio_snprintf(tmp_key, key_len + 1, "%s", prop);
     key = tmp_key;
 
     value = &prop[key_len + 1];
@@ -2256,7 +2257,7 @@
 
     // Feed the cache size setting into the JDK
     char buffer[1024];
-    sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
+    jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
     if (!add_property(buffer)) {
       return JNI_ENOMEM;
     }
@@ -2777,8 +2778,8 @@
       if (tail != NULL) {
         const char* pos = strchr(tail, ':');
         size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
-        char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len);
-        name[len] = '\0';
+        char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
+        jio_snprintf(name, len + 1, "%s", tail);
 
         char *options = NULL;
         if(pos != NULL) {
@@ -2854,7 +2855,9 @@
       return JNI_ERR;
 #else
       if (tail != NULL) {
-        char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtArguments), tail);
+        size_t length = strlen(tail) + 1;
+        char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
+        jio_snprintf(options, length, "%s", tail);
         add_init_agent("instrument", options, false);
         // java agents need module java.instrument
         if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
@@ -3512,7 +3515,7 @@
   // check if the default lib/endorsed directory exists; if so, error
   char path[JVM_MAXPATHLEN];
   const char* fileSep = os::file_separator();
-  sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
+  jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
 
   if (CheckEndorsedAndExtDirs) {
     int nonEmptyDirs = 0;
@@ -3534,7 +3537,7 @@
     return JNI_ERR;
   }
 
-  sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
+  jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
   dir = os::opendir(path);
   if (dir != NULL) {
     jio_fprintf(defaultStream::output_stream(),