Fall back to a compromise position, which makes my mutex implementation
initialiser- and structure-compatible with LinuxThreads, and ditto the
upcoming condition var implementation. In particular this means that
((ThreadId)0) is an invalid thread ID, so vg_threads[0] is never used,
and vg_threads[1] specially denotes the "main" thread.
Remove the scheme of having a linked list of threads waiting on
each mutex. It is too difficult to get the right semantics for
when a signal is delivered to a thread blocked in pthread_mutex_lock().
Instead, use the old scheme of each thread stating with its .waited_on_mx
field, which mutex it is waiting for. This makes pthread_mutex_unlock()
less efficient, but at least it all works.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@100
for implementation of condition variables.
* Use the native pthread_mutex_t directly; we no longer have our own
VgMutex type nor a fixed array of them.
* Give ThreadState a new field q_next :: ThreadId, used to make a
linked list of threads waiting on a mutex, or condition variable.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@99
Various enhancements:
* Make the error message system more thread-aware.
* Fix stupid bug in do_pthread_create causing incorrect initial
%ESP values sometimes.
* Fix various other minor things needed to make opera work.
Performance of threaded apps is pretty terrible. This needs
looking into.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@98
of pthread event tracing. And allow this info to be passed across to
the client, where vg_libpthread.c uses it to also control verbosity.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@91
to run. Now it creates some threads but segfaults. Also add
wrapper for syscall __NR_mremap; it is way wrong, but finding
a decent description of what mremap() really does is nearly
impossible.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@89
pthread_setspecific, pthread_getspecific. They don't do anything
right now and may well crash programs which use them.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@66
