memory corruption checker

1 files changed, 10 insertions, 0 deletions

diff --git a/src/settings.js b/src/settings.js
index 002e66d4..74176914 100644
--- a/src/settings.js
+++ b/src/settings.js
@@ -134,6 +134,16 @@ var SAFE_HEAP_LOG = 0; // Log out all SAFE_HEAP operations
 
 var ASM_HEAP_LOG = 0; // Simple heap logging, like SAFE_HEAP_LOG but cheaper, and in asm.js
 
+var CORRUPTION_CHECK = 0; // When enabled, will emit a buffer area at the beginning and
+                          // end of each allocation on the heap, filled with canary
+                          // values that can be checked later. Corruption is checked for
+                          // at the end of each at each free() (see jsifier to add more, and you
+                          // can add more manual checks by calling CorruptionChecker.checkAll).
+                          // 0 means not enabled, higher values mean the size of the
+                          // buffer areas as a multiple of the allocated area (so
+                          // 1 means 100%, or buffer areas equal to allocated area,
+                          // both before and after).
+
 var LABEL_DEBUG = 0; // 1: Print out functions as we enter them
                      // 2: Also print out each label as we enter it
 var LABEL_FUNCTION_FILTERS = []; // Filters for function label debug.