Thanks!
On 10/14/2016 01:29 PM, Jonathan Wakely wrote:
On 14 October 2016 at 18:26, Nikolaus Dunn wrote:
Hi all,
According to what I've read, the "new" and "new []" expressions are
implemented by the compiler to compute the size of the storage required by
the type and then make a call to one of the "new" operators to allocate
memory and handle construction. I've found the code for the "new" operators
in gcc, but I can't find where in the gcc code the compiler determines the
value to be passed to the new operator and then sets up the actual call.
Look for build_new() in gcc/cp/init.c
The reason I'm asking is I am interested in how the compiler implements the
"new []" expression. In particular, how it is storing the array size and is
there any extra overhead being stored and what it is, if any.
That is specified by the ABI, see
https://mentorembedded.github.io/cxx-abi/abi.html#array-cookies
I'm assuming it is the actual parser/code generator that is doing this since
they are unique expressions and not simply function calls. Can someone point
me to where this code is being generated or correct my ignorance if I am way
off base?
