kernel,libroot,boot: remove c++11 and gnu++11 flags.

* c++14 is the default with current GCC
* remove pragmas for x86intrin.h

libroot_debug: Merge guarded heap into libroot_debug.

The individual debug heap implementations are now exposed via a
structure of function pointers and a common frontend dispatches the
malloc and malloc_debug APIs through them.

The MALLOC_DEBUG environment variable can be used to select the guarded
heap by adding 'g', otherwise the debug heap is used as the default.
Consequently the separate libroot_guarded is not needed anymore and has
been removed.

To allow the use of environment variables this early, init_env_post_heap
has been added and the heap dependent atfork() moved there. This allowed
to fold the code of init_heap_post_env into init_heap so the former has
been removed.

guarded_heap: Replace symbol lookup syscall with runtime_loader.

Use the private runtime_loader API to do the symbol lookup instead of
using the syscall.

Make guarded heap accessible through its own libroot_guarded.so.

This adds libroot_guarded.so to the HaikuDevel package. It is the same
as libroot_debug with the debug heap swapped out for the guarded heap.
The guarded heap has some useful features that make it desirable to use
while having the disadvantage of a large memory and address space
overhead which make it unusable in some situations. Therefore the
guarded heap cannot simply replace the debug heap but should still be
made available. As the heap init needs to happen even before having
environment variables, the heap to use can not be chosen dynamically.
Exposing them through their own libraries is the next best thing.

malloc_debug: Set default alignment to max_align_t if available.

For it to be available we build malloc_debug in C++11 mode when not
using GCC2. Note that max_align_t is not in the std namespace in GCC4
versions prior to GCC 4.9. The extra "using namespace std" is there to
be forward compatible once we update.

More work towards hybrid support

* All packaging architecture dependent variables do now have a
respective suffix and are set up for each configured packaging
architecture, save for the kernel and boot loader variables, which
are still only set up for the primary architecture.
For convenience TARGET_PACKAGING_ARCH, TARGET_ARCH, TARGET_LIBSUPC++,
and TARGET_LIBSTDC++ are set to the respective values for the primary
packaging architecture by default.
* Introduce a set of MultiArch* rules to help with building targets for
multiple packaging architectures. Generally the respective targets are
(additionally) gristed with the packaging architecture. For libraries
the additional grist is usually omitted for the primary architecture
(e.g. libroot.so and <x86>libroot.so for x86_gcc2/x86 hybrid), so that
Jamfiles for targets built only for the primary architecture don't
need to be changed.
* Add multi-arch build support for all targets needed for the stage 1
cross devel package as well as for libbe (untested).

Add a userland version of the guarded heap to libroot_debug.

The guarded heap uses mprotect() to protect freed/unallocated pages so
that any access to such a page results in a segfault. It also installs
a segfault handler that in such an event prints some info about the
accessed page and then calls the debugger with a meaningful message.

It implements the same interface as the debug heap so it can simply be
swapped out by changing the Jamfile. As it doesn't support most of the
extra debug features (wall checking is obviously superfluous, but it
also doesn't help in leak checking) and as it is hugely space
inefficient I left it disabled for now.

Introduce __set_errno() throughout libroot.

* add errno_private.h, which defines the __set_errno() macro with
and without tracing
* instead of setting errno manually, all libroot's code now invokes
__set_errno(), which makes it much easier to trace changes to errno
* redirect glibc's use of __set_errno() to our own version

* Build library libroot_debug.so, which is the standard libroot.so with the
debug heap implementation.
* Added libroot_debug.so to the DevelopmentMin optional package. Since it has
the same soname as the standard libroot, it can simply be specified in
LD_PRELOAD to run a program with that version.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34788 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Use mutex and rw_lock and the proper AutoLockers as in the kernel version, as
these interfaces are now available.
* Don't be quite so paranoid by default, the checks that are on by default
should be enough to detect most memory corruptions.

This makes the debug heap way more usable, so much that you can even use it as
your normal everyday heap without noticing much performance impact (it has quite
a bit of additional memory overhead though).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33544 a95241bf-73f2-0310-859d-f6bbb57e9c96

Ported over the kernel heap to libroot to make use of it's validation
capabilities to aid in debugging memory corruption issues.

It does:
* Initialize memory to 0xcc to help turn up use of uninitialized memory
* Set freed memory to 0xdeadbeef to help find accesses of freed memory
* Use the paranoid heap validation to turn up many cases of memory corruption
* Use a simplistic wall check to turn up memory overwrites past allocations
* Take extra steps to validate freed addresses to turn up misaligned frees

It has an interface to en-/disable paranoid validation and to start/stop regular
wall checking. Both are currently just enabled. At a later stage a debug version
of libroot could be used by an application and the checks enabled at will. Note
that due to the paranoid validation and the suboptimal locking this allocator
will perform horribly. Still to find memory corruption issues in the system or
also in your applications it can be helpful to build your installation with it
turned on. To enable it you currently need to edit the Jamfile to sub-include
the malloc_debug instead of the malloc directory.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32894 a95241bf-73f2-0310-859d-f6bbb57e9c96

libroot_debug: Merge guarded heap into libroot_debug.

The individual debug heap implementations are now exposed via a
structure of function pointers and a common frontend dispatches the
malloc and malloc_debug APIs through them.

The MALLOC_DEBUG environment variable can be used to select the guarded
heap by adding 'g', otherwise the debug heap is used as the default.
Consequently the separate libroot_guarded is not needed anymore and has
been removed.

To allow the use of environment variables this early, init_env_post_heap
has been added and the heap dependent atfork() moved there. This allowed
to fold the code of init_heap_post_env into init_heap so the former has
been removed.

guarded_heap: Replace symbol lookup syscall with runtime_loader.

Use the private runtime_loader API to do the symbol lookup instead of
using the syscall.

Make guarded heap accessible through its own libroot_guarded.so.

This adds libroot_guarded.so to the HaikuDevel package. It is the same
as libroot_debug with the debug heap swapped out for the guarded heap.
The guarded heap has some useful features that make it desirable to use
while having the disadvantage of a large memory and address space
overhead which make it unusable in some situations. Therefore the
guarded heap cannot simply replace the debug heap but should still be
made available. As the heap init needs to happen even before having
environment variables, the heap to use can not be chosen dynamically.
Exposing them through their own libraries is the next best thing.

malloc_debug: Set default alignment to max_align_t if available.

For it to be available we build malloc_debug in C++11 mode when not
using GCC2. Note that max_align_t is not in the std namespace in GCC4
versions prior to GCC 4.9. The extra "using namespace std" is there to
be forward compatible once we update.

More work towards hybrid support

* All packaging architecture dependent variables do now have a
respective suffix and are set up for each configured packaging
architecture, save for the kernel and boot loader variables, which
are still only set up for the primary architecture.
For convenience TARGET_PACKAGING_ARCH, TARGET_ARCH, TARGET_LIBSUPC++,
and TARGET_LIBSTDC++ are set to the respective values for the primary
packaging architecture by default.
* Introduce a set of MultiArch* rules to help with building targets for
multiple packaging architectures. Generally the respective targets are
(additionally) gristed with the packaging architecture. For libraries
the additional grist is usually omitted for the primary architecture
(e.g. libroot.so and <x86>libroot.so for x86_gcc2/x86 hybrid), so that
Jamfiles for targets built only for the primary architecture don't
need to be changed.
* Add multi-arch build support for all targets needed for the stage 1
cross devel package as well as for libbe (untested).

Add a userland version of the guarded heap to libroot_debug.

The guarded heap uses mprotect() to protect freed/unallocated pages so
that any access to such a page results in a segfault. It also installs
a segfault handler that in such an event prints some info about the
accessed page and then calls the debugger with a meaningful message.

It implements the same interface as the debug heap so it can simply be
swapped out by changing the Jamfile. As it doesn't support most of the
extra debug features (wall checking is obviously superfluous, but it
also doesn't help in leak checking) and as it is hugely space
inefficient I left it disabled for now.

Introduce __set_errno() throughout libroot.

* add errno_private.h, which defines the __set_errno() macro with
and without tracing
* instead of setting errno manually, all libroot's code now invokes
__set_errno(), which makes it much easier to trace changes to errno
* redirect glibc's use of __set_errno() to our own version

* Build library libroot_debug.so, which is the standard libroot.so with the
debug heap implementation.
* Added libroot_debug.so to the DevelopmentMin optional package. Since it has
the same soname as the standard libroot, it can simply be specified in
LD_PRELOAD to run a program with that version.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34788 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Use mutex and rw_lock and the proper AutoLockers as in the kernel version, as
these interfaces are now available.
* Don't be quite so paranoid by default, the checks that are on by default
should be enough to detect most memory corruptions.

This makes the debug heap way more usable, so much that you can even use it as
your normal everyday heap without noticing much performance impact (it has quite
a bit of additional memory overhead though).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33544 a95241bf-73f2-0310-859d-f6bbb57e9c96

Ported over the kernel heap to libroot to make use of it's validation
capabilities to aid in debugging memory corruption issues.

It does:
* Initialize memory to 0xcc to help turn up use of uninitialized memory
* Set freed memory to 0xdeadbeef to help find accesses of freed memory
* Use the paranoid heap validation to turn up many cases of memory corruption
* Use a simplistic wall check to turn up memory overwrites past allocations
* Take extra steps to validate freed addresses to turn up misaligned frees

It has an interface to en-/disable paranoid validation and to start/stop regular
wall checking. Both are currently just enabled. At a later stage a debug version
of libroot could be used by an application and the checks enabled at will. Note
that due to the paranoid validation and the suboptimal locking this allocator
will perform horribly. Still to find memory corruption issues in the system or
also in your applications it can be helpful to build your installation with it
turned on. To enable it you currently need to edit the Jamfile to sub-include
the malloc_debug instead of the malloc directory.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32894 a95241bf-73f2-0310-859d-f6bbb57e9c96