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- From: Nikolaus Dunn <nikdunn1979 at gmail dot com>
- To: gcc at gcc dot gnu dot org
- Date: Tue, 27 Sep 2016 11:01:49 -0400
- Subject: Optimization question
- Authentication-results: sourceware.org; auth=none
I've run into an issue where turning on compiler optimization using -O1
or higher causes an issue in my program. Specifically, I am replacing
the new and delete operators globally to perform some real time
allocation tracking. When I compile with -O1 or -O2, my implementation
of new is not being called by STL classes, via the std::allocator. My
version of delete IS being called.
I realize I may be doing something wrong and I've read many posts from
people saying not to replace new and delete, but I'm hacking on a 15
year old baseline. We've just stepped up to GCC 5.3.0 and are compiling
with the -std=c++14 option (to give a little context). I'm also
compiling using MinGW, but I'm figuring MinGW would be using the same
optimization logic at the compiler level as pure GCC.
Before I go through by hand and try to determine which optimization
seems to be causing the problem, does anyone have a suggestion as to the
culprit? Am I doing something essentially wrong? I'd happily post an
example program, but I'm hoping my question is general enough in nature
to warrant an easy response.