When using GCC 4.3.2 in a ARM7 (LPC2387) environment, if I have one process that creates and deletes a lot one class instance using new and delete, and that process waits on serial interrupt, sometimes the SP register gets zeroed and I have a data abort. The weird thing is that creating and removing the instance using static declaration (creating a new block for example), the problem doesn’t occur. It always occur only with new and delete.
If I use GCC 4.2 (tried with 4.2.2 and 4.2.4), the problem doesn’t occur.
What I want to know is if someone have any similar problem or if someone have success with GCC 4.3
I have still on GCC 4.2 and have not tried 4.3 but I suspect it might be something to do with the libraries more than the compiler. new and delete must be allocating memory from the heap so there is the potential for fragmentation. When they are static the heap will not be used.
Actually - my mistake - it is working fine with GCC V4.3.2 and with both -O0 and -O3 settings. It was just my dodgy debug setup that was causing problems. If I flash the board and run it stand alone (not in the debugger) then everything is ok.
The problem seems to be on "new" implementation, so, if using just C will not trigger the error. Could you please try C++ wih a lot of "new" and "delete"?