changeset 4072:1ba2ed1c07df

8003689: MemTracker::init_tracking_options() reads outside array if commandline argument is empty Summary: Fixed potential buffer overrun when giving empty option to NativeMemoryTracking commandline option Reviewed-by: ctornqvi, hseigel, kvn
author zgu
date Wed, 28 Nov 2012 09:19:38 -0500
parents 2c3dca6e1d65
children b9e0f2c87dd6
files src/share/vm/services/memTracker.cpp
diffstat 1 files changed, 4 insertions(+), 7 deletions(-) [+]
line wrap: on
line diff
--- a/src/share/vm/services/memTracker.cpp	Fri Sep 21 10:56:28 2012 +0200
+++ b/src/share/vm/services/memTracker.cpp	Wed Nov 28 09:19:38 2012 -0500
@@ -69,15 +69,12 @@
 
 void MemTracker::init_tracking_options(const char* option_line) {
   _tracking_level = NMT_off;
-  if (strncmp(option_line, "=summary", 8) == 0) {
+  if (strcmp(option_line, "=summary") == 0) {
     _tracking_level = NMT_summary;
-  } else if (strncmp(option_line, "=detail", 7) == 0) {
+  } else if (strcmp(option_line, "=detail") == 0) {
     _tracking_level = NMT_detail;
-  } else {
-    char msg[255];
-    //+1 to remove the '=' character
-    jio_snprintf(msg, 255, "Unknown option given to XX:NativeMemoryTracking: %s", option_line+1);
-    vm_exit_during_initialization(msg, NULL);
+  } else if (strcmp(option_line, "=off") != 0) {
+    vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
   }
 }