Long time no see :)
It appears uClibc pthreads native debugging is broken w.r.t thread exit handling in
uClibc(at least on PPC). When debugging ex7, gdb(6.2.1) bails out as
soon as a thread exits. I found a comment in gdb that TD_DEATH handling was broken for
glibc 2.3.1, so I figured that maybe it was broken in uClibc also.
I added a #if 0 #endif in pthread_exit( see patch below) and then
gdb behaved again.
While looking into this I found a few differences( included in the patch)
between glibc and uClibc. Don't know if these makes a difference, but I leave that to
you to decide.
Jocke
adding cruft to include/sys/time.h. But also, there's no sense in
making changes like this until we decide how we're going to approach
the hidden symbol transition.
Codepaths streamlined. Improved performance for nonthreaded apps
when linked with a thread-enabled libc.
Minor iconv bug and some locale/thread related startup issues fixed.
These showed up in getting a gcj-compiled java helloworld app running.
Removed some old extension functions... _stdio_fdout and _stdio_fsfopen.
Should be standards compliant and with several optional features,
including support for hexadecimal float notation, locale awareness,
glibc-like locale-specific digit grouping with the `'' flag, and
positional arg support. I tested it pretty well (finding several
bugs in glibc's scanf in the process), but it is brand new so be
aware.
The *wprintf functions now support floating point output. Also, a
couple of bugs were squashed. Finally, %a/%A conversions are
now implemented.
Implement the glibc xlocale interface for thread-specific locale
support. Also add the various *_l(args, locale_t loc_arg) funcs.
NOTE!!! setlocale() is NOT threadsafe! NOTE!!!
The strto{floating point} conversion functions are now locale aware.
The also now support hexadecimal floating point notation.
Add the wcsto{floating point} conversion functions.
Fix a bug in mktime() related to dst. Note that unlike glibc's mktime,
uClibc's version always normalizes the struct tm before attempting
to determine the correct dst setting if tm_isdst == -1 on entry.
Add a stub version of the libintl functions. (untested)
Fixed a known memory leak in setlocale() related to the collation data.
Add lots of new config options (which Erik agreed to sort out :-),
including finally exposing some of the stripped down stdio configs.
Be careful with those though, as they haven't been tested in a
long time.
(temporary) GOTCHAs...
The ctype functions are currently incorrect for 8-bit locales. They
will be fixed shortly.
The ctype functions are now table-based, resulting in larger staticly
linked binaries. I'll be adding an option to use the old approach
in the stub locale configuration.
I found a problem in uClibc in libpthread/linuxthres/condvar.c:
pthread_cond_timedwait never uses rt singals
uClibc has two implementations of pthread_cond_timewait -
pthread_cond_timedwait_relative_old using the "normal" signals and
pthread_cond_timedwait_relative_new usign the rt signals
(for kernels >= 2.2).
The function pointer pthread_cond_tw_rel is initialised with the old
function. In "__pthread_init_condvar(int)" this pointer is set to the new
function using rt signals, but "__pthread_init_condvar" is never called in
the uClibc.
The following patch solves this issue, so that __pthread_init_condvars
is called and the function pointer is always initialised with the correct
function.
regards,
christian
glibc 2.1.3 and ported to work with uClibc by Stefan Soucek and Erik Andersen
(me). Stefan has hacked things up such that linuxthreads runs on MMU-less
systems (tested only on arm-nommu). Erik cleaned things up and made it work
properly as a shared library.
-Erik
