Feature request: tcmalloc should support a debug mode that sanity checks allocations/deallocations

[GoogleCodeExporter]

This is a feature request. Tcmalloc should support a debug mode where it 
sanity checks the various allocations/deallocations. For instance, it could  
do one or more of the following in this mode:

1) Check that a pointer being freed is valid (e.g., guard against multiple 
frees of the same pointer).

2) Insert a guard zone at the beginning and end of an allocated memory 
region and ensure (during deallocation) that this guard zone was not 
overwritten by the user.

3) Check use of already freed memory. This can be done by writing a magic 
number in the freed block and then at a subsequent allocation checking that 
this magic number is not overwritten.

Original issue reported on code.google.com by mohit.a...@gmail.com on 22 Mar 2009 at 6:02

[GoogleCodeExporter]

Original comment by csilv...@gmail.com on 26 Mar 2009 at 2:14

• Added labels: Priority-Low, Type-Enhancement

[GoogleCodeExporter]

We now provide this!, as part of perftools 1.4.  It does all 3 things you asked 
for
and a bit more.  Play around with it and see what you think.

Original comment by csilv...@gmail.com on 11 Sep 2009 at 6:44

• Changed state: Fixed

[GoogleCodeExporter]

Great - thanks.

Original comment by mohit.a...@gmail.com on 11 Sep 2009 at 6:49