Remove svn:mergeinfo carried over from stable/9.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC: r253266

Prefix the alias macros for members of struct __mcontext with an underscore
in order to avoid a clash in the net80211 code.

MFC r232263:

Define several extra macros in bsd.sys.mk and sys/conf/kern.pre.mk, to
get rid of testing explicitly for clang (using ${CC:T:Mclang}) in
individual Makefiles.

Instead, use the following extra macros, for use with clang:
- NO_WERROR.clang (disables -Werror)
- NO_WCAST_ALIGN.clang (disables -Wcast-align)
- NO_WFORMAT.clang (disables -Wformat and friends)
- CLANG_NO_IAS (disables integrated assembler)
- CLANG_OPT_SMALL (adds flags for extra small size optimizations)

As a side effect, this enables setting CC/CXX/CPP in src.conf instead of
make.conf! For clang, use the following:

CC=clang
CXX=clang++
CPP=clang-cpp

MFC r228578

In lib/libthread_db/arch/i386/libpthread_md.c, clang gives two incorrect
warnings about alignment, so turn -Wcast-align off for now.

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Change lwp to int64_t as thr_pread_long() always uses a 64-bit value
in order to account for LP64 targets when cross-debugging on ILP32,
allowing r224683 to compile on ILP32.
Note that thr_p{read,write}_{long,ptr}() still incorrectly use the size
of the respective types on the host rather than that on the target when
accessing the target address space which still needs to be fixed. This
means that r224683 alone may not be sufficient to solve the problem it's
intended to fix when cross-debugging.

Approved by: re (hrs)

Implement

Reviewed by: marcel
Approved by: re (kib)
MFC after: 1 week

Use the size of struct fpreg rather than of the pointer to it when copying
the FPU state.

Reviewed by: marcel
Approved by: re (kib)
MFC after: 1 week

The tid member of struct pthread actually is long so read it as such.
Accessing it as an int causes failure on big-endian LP64, i.e. mips64be,
powerpc64 and sparc64.

Reviewed by: marcel
Approved by: re (kib)
MFC after: 1 week

Repair some build breakage introduced in r211725 and garbage collect some
code made obsolete in the same commit.

MFtbemd:

Prefer MACHNE_CPUARCH to MACHINE_ARCH in most contexts where you want
to test of all the CPUs of a given family conform.

Powerpc64 thread libraries support.

Extend the td_thrinfo_t to include siginfo for the signal that stopped
the target. Take care of ABI.

Suggested by: davidxu
MFC after: 2 weeks

Build lib/ with WARNS=6 by default.

Similar to libexec/, do the same with lib/. Make WARNS=6 the norm and
lower it when needed.

I'm setting WARNS?=0 for secure/. It seems secure/ includes the
Makefile.inc provided by lib/. I'm not going to touch that directory.
Most of the code there is contributed anyway.

Revert r181651, which changed the ABI, and use a temp variable instead.

Suggested by: attilio

libc_r_* library is no more required, so just axe it.

Approved by: marcel, emaste
Sponsored by: Sandvine Incorporated

Allow psaddr_t to be widened by using thr_pread_{int,long,ptr},
where critical. Some places still use ps_pread/ps_pwrite directly,
but only need changed when byte-order comes into the picture.
Also, change th_p in td_event_msg_t from a pointer type to
psaddr_t, so that events also work when psaddr_t is widened.

Add the needed libpthread_md.c for MIPS.

Obtained from: Juniper Networks

Change the type of ti_traceme from a char to an int as its
address is passed to ps_pread for reading sizeof(int) bytes.

Cleanup for WARNS 6.

Add thr_pread_{int,long,ptr} and thr_pwrite_{int,long,ptr} to
help abstract the sizes and endianness of the primary types of
the target. These currently use the native characteristics.

Cleanup for WARNS 3.

Cleanup for WARNS 2.

Change the type of psaddr_t from void* to uintptr_t. A pointer
type cannot be made wider to allow ILP32 platforms to target
LP64 platforms.

- Restore kse.h in this directory so other tools don't find it by mistake.
- Restore the ability to debug kse coredumps in 8.0.

Suggested by: marcel

Use linker set to collection all target operations.

- Remove libkse and related support code in libpthread from the build.
Don't remove the files yet. Kernel support will be removed shortly.

Add arm support in libthread_db.

Include string.h for memcpy() and memcmp().

Bump library versions in preparation for 7.0.

Ok'd by: kan

Enable symbol versioning by default. Use WITHOUT_SYMVER to disable it.
Warning, after symbol versioning is enabled, going back is not easy
(use WITHOUT_SYMVER at your own risk).

Change the default thread library to libthr.

There most likely still needs to be a version bump for at least the
thread libraries. If necessary, this will happen later.

Roughly implement libpthread support.

Use C comments since we now preprocess these files with CPP.

remove libc_r remanent.

Remove libc_r support.

Remove alpha-specific stuff.

Add stub functions. This allows libthread_db to be built and installed,
which means that we also have <thread_db.h>.

Fix return value.

get thread signal info.

Add symbol versioning.

Reviewed by: davidxu

Use ps_linfo to retrieve LWP info, current it is used to retrieve
signal mask and pending signals.

Use ps_linfo to retrieve LWP info.

Replace ptrace syscall with ps_lgetgregs to check a LWP's existence.

Always clear thread info buffer to zero.

Bump the shared library version number of all libraries that have not
been bumped since RELENG_5.

Reviewed by: ru
Approved by: re (not needed for commit check but in principle...)

Add support for XMM registers in GDB for x86 processors that support
SSE (or its successors).

Reviewed by: marcel, davidxu
MFC After: 2 weeks

Remove unused variables.

o Code cleanup, eliminate private thread id map, directly
use lwpid as thread id.
o Export tls pointer.

Fill traceme and events fields.

Sync with debugger code in libthr.

Export thread address.

Update debugger code for new libthr.

Plug a memory leak in error case.

1. Use libpthread's exported symbols to calcuate offset in data structure
2. Enable TLS debugger support.

1. Add missing functions: libthr_dbresume,libthr_dbsuspend.
2. Implement functions: libthr_db_thr_setfpregs, libthr_db_thr_setregs,
libthr_db_ta_map_id2thr.
3. simplify libthr_db_thr_getfpregs, libthr_db_thr_getgregs.

1.Use new way to check if a thread is in critical region, defer suspending
if it is true.
2.Add thread_db api td_thr_tls_get_addr to get tls address, the real code
is commented out util tls patch is committed.

Reviewed by: deischen

s/TMDF_DONOTRUNUSER/TMDF_SUSPEND/g

Dicussed with: deischen

Add missing thread suspension/resumption code, fix a bug in pt_thr_sstep,
don't overwrite other debug flags.

Add code to implement register structure converter.

prgregset_t changed type from being a typedef of struct reg to an
array of one element of type struct reg. Change the argument to
libc_r_md_getgregs() accordingly.

This library is not WARNS=2 clean for -O2 builds, because we include
headers from libpthread that are not WARNS=2 clean for -O2 builds.
Lower the WARNS level to 1. This is the highest level possible for
now.

Correct the mess I made by committing from the wrong tree. Most
notably, this restores some of the contents in thread_db.h as well
as David Xu's copyright notice. This also fixes the includes in
the MD libpthread files which Scott tried to provide a quick fix
for.

Pointy hat: marcel

Try to fix ia64 and alpha compiles. I don't have either equipment fired
up now, but it appears to be the same problem and solution as sparc64.

Add missing #includes so that this can compile. Obtained from the i386 version.

Add rudimentary support and stubs for libthr and libc_r on alpha, amd64,
i386, ia64 and sparc64. Add stubs for alpha, amd64, ia64 and sparc64 for
libpthread.

Restructure the source files to avoid unnecessary use of subdirectories
that also force us to use non-portable compilation flags to deal with
the uncommon compilation requirements (building archive libraries for
linkage into a shared library).

The libpthread support has been copied from the original local and
cleaned-up to make them WARNS=2 clean.
that also force us to use non-portable compilation flags to deal with
the uncommon compilation requirements (building archive libraries for
linkage into a shared library).

The libpthread support has been copied from the original local and
cleaned-up to make them WARNS=2 clean.

Tested on: amd64, i386, ia64

Add the const qualifier to the prgregset_t argument for the *setregs*
functions.

Add my initial work of libthread_db. The library is used by gdb to debug
threaded process. Current, only libpthread is supported, but macrel will
work on it to support libthr and libc_r.