The name malloc-leaks-cxx-stl-string-classes-debug was confusing
since the suppression wasn't a leak, not part of stl, string,
classes or debug. Rename it to libstdcxx-emergency-eh-alloc-pool
to indicate it is part of the emergency exception handling memory
pool.
Note that suppression is only needed for some test cases, normally
the pool is cleaned up as part of cxx_freeres.
This time with debuginfo removed.
Also update the vgtest files for a couple of massif tests
(and also the expected because of the commmand line change).
Not yet tested these two with debuginfo installed.
The problem is that the testcase specific suppression has stacks
that are too specific. This causes breakage with different versions
of GCC and libstdc++. The suppression only needs to mask the memory
pool used for standard io.
There are several suppression stanzas so future tweaks may still be
necessary.
On Fedora 33 with gcc (GCC) 10.2.1 20201125 (Red Hat 10.2.1-9)
it looks like fun:__static_initialization_and_destruction_0 is
now inlined which causes the existing suppression for the
same reachable to no longer match.
memcheck/tests/leak_cpp_interior might fail because depending on compiler
and arch used the suppression file used doesn't catch some allocations
through the DT_INIT_ARRAY functions.
That memory doesn't actually leak, it gets freed by the
__gnu_cxx::__freeres hook. But since this testcase shows leaks while
running, not after the program ends, it needs to suppress these allocations.
https://bugs.kde.org/show_bug.cgi?id=406360
The bug itself was solved in 3.12 by the addition of __gnu_cxx::__freeres
in the libstdc++ and have valgrind calling it before exit.
However, depending on the version of the libstdc++, the test leak_cpp_interior
was giving different results.
This commit adds some filtering specific to the test, so as to not depend
anymore of the absolute number of bytes leaked, and adds a suppression entry to
ignore the memory allocated by libstdc++.
This allows to have only 2 .exp files, instead of 4 (or worse, if
we would have to handle yet other .exp files depending on the libstdc++
version).
