On 3/22/19 7:58 AM, Sebastian Roland wrote:
Hi,
I am currently trying to understand the internals of Gcov. Specifically
I am wondering of the following:
1) Certain Basic Blocks are instrumented with counters that are
incremented during execution. During compilation a destructor is
registered that actually goes through a gcov_info struct and finds all
counters in the appropriate gcov_fn_info struct(s). My question is how
(and where in the source code) do the references to the various counters
are linked to the gcov_info struct?
gcc/coverage.c generates the increments and the spanning tree used to
determine where to place them.
2) What exactly is the purpose of the constructor (__gcov_init()) and
where are the values of the passed gcov_info struct set (probably
related to 1)?
It's a global constructor, libgcc/libgcov-$something
natha
--
Nathan Sidwell
