#include <sys/wait.h>
#endif
+#ifdef LISP_FEATURE_MACH_EXCEPTION_HANDLER
+#include <mach/mach.h>
+#include <mach/mach_error.h>
+#include <mach/mach_types.h>
+#endif
+
#include "runtime.h"
#include "validate.h" /* for CONTROL_STACK_SIZE etc */
#include "alloc.h"
#if defined(LISP_FEATURE_DARWIN) && defined(LISP_FEATURE_SB_THREAD)
#define QUEUE_FREEABLE_THREAD_STACKS
+#define LOCK_CREATE_THREAD
+#endif
+
+#ifdef LISP_FEATURE_FREEBSD
+#define CREATE_CLEANUP_THREAD
+#define LOCK_CREATE_THREAD
#endif
#define ALIEN_STACK_SIZE (1*1024*1024) /* 1Mb size chosen at random */
#ifdef LISP_FEATURE_SB_THREAD
pthread_mutex_t all_threads_lock = PTHREAD_MUTEX_INITIALIZER;
+#ifdef LOCK_CREATE_THREAD
+static pthread_mutex_t create_thread_lock = PTHREAD_MUTEX_INITIALIZER;
+#endif
#endif
#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
#ifdef QUEUE_FREEABLE_THREAD_STACKS
+static void
queue_freeable_thread_stack(struct thread *thread_to_be_cleaned_up)
{
if (thread_to_be_cleaned_up) {
}
}
+#elif defined(CREATE_CLEANUP_THREAD)
+static void *
+cleanup_thread(void *arg)
+{
+ struct freeable_stack *freeable = arg;
+ pthread_t self = pthread_self();
+
+ FSHOW((stderr, "/cleaner thread(%p): joining %p\n",
+ self, freeable->os_thread));
+ gc_assert(pthread_join(freeable->os_thread, NULL) == 0);
+ FSHOW((stderr, "/cleaner thread(%p): free stack %p\n",
+ self, freeable->stack));
+ os_invalidate(freeable->stack, THREAD_STRUCT_SIZE);
+ free(freeable);
+
+ pthread_detach(self);
+
+ return NULL;
+}
+
+static void
+create_cleanup_thread(struct thread *thread_to_be_cleaned_up)
+{
+ pthread_t thread;
+ int result;
+
+ if (thread_to_be_cleaned_up) {
+ struct freeable_stack *freeable =
+ malloc(sizeof(struct freeable_stack));
+ gc_assert(freeable != NULL);
+ freeable->os_thread = thread_to_be_cleaned_up->os_thread;
+ freeable->stack =
+ (os_vm_address_t) thread_to_be_cleaned_up->control_stack_start;
+ result = pthread_create(&thread, NULL, cleanup_thread, freeable);
+ gc_assert(result == 0);
+ sched_yield();
+ }
+}
+
#else
static void
free_thread_stack_later(struct thread *thread_to_be_cleaned_up)
{
lispobj function;
int result, lock_ret;
+
FSHOW((stderr,"/creating thread %lu\n", thread_self()));
function = th->no_tls_value_marker;
th->no_tls_value_marker = NO_TLS_VALUE_MARKER_WIDETAG;
gc_assert(lock_ret == 0);
result = funcall0(function);
+
+ /* Block GC */
+ block_blockable_signals();
th->state=STATE_DEAD;
/* SIG_STOP_FOR_GC is blocked and GC might be waiting for this
os_invalidate((os_vm_address_t)th->interrupt_data,
(sizeof (struct interrupt_data)));
+#ifdef LISP_FEATURE_MACH_EXCEPTION_HANDLER
+ FSHOW((stderr, "Deallocating mach port %x\n", THREAD_STRUCT_TO_EXCEPTION_PORT(th)));
+ mach_port_move_member(mach_task_self(),
+ THREAD_STRUCT_TO_EXCEPTION_PORT(th),
+ MACH_PORT_NULL);
+ mach_port_deallocate(mach_task_self(),
+ THREAD_STRUCT_TO_EXCEPTION_PORT(th));
+ mach_port_destroy(mach_task_self(),
+ THREAD_STRUCT_TO_EXCEPTION_PORT(th));
+#endif
+
#ifdef QUEUE_FREEABLE_THREAD_STACKS
queue_freeable_thread_stack(th);
+#elif defined(CREATE_CLEANUP_THREAD)
+ create_cleanup_thread(th);
#else
free_thread_stack_later(th);
#endif
int i;
#endif
+#ifdef CREATE_CLEANUP_THREAD
+ /* Give a chance for cleanup threads to run. */
+ sched_yield();
+#endif
/* may as well allocate all the spaces at once: it saves us from
* having to decide what to do if only some of the allocations
* succeed */
}
th->interrupt_data->pending_handler = 0;
th->no_tls_value_marker=initial_function;
+
+ th->stepping = NIL;
return th;
}
+#ifdef LISP_FEATURE_MACH_EXCEPTION_HANDLER
+mach_port_t setup_mach_exception_handling_thread();
+kern_return_t mach_thread_init(mach_port_t thread_exception_port);
+
+#endif
+
void create_initial_thread(lispobj initial_function) {
struct thread *th=create_thread_struct(initial_function);
if(th) {
+#ifdef LISP_FEATURE_MACH_EXCEPTION_HANDLER
+ kern_return_t ret;
+
+ setup_mach_exception_handling_thread();
+#endif
initial_thread_trampoline(th); /* no return */
} else lose("can't create initial thread\n");
}
FSHOW_SIGNAL((stderr,"/create_os_thread: creating new thread\n"));
+#ifdef LOCK_CREATE_THREAD
+ retcode = pthread_mutex_lock(&create_thread_lock);
+ gc_assert(retcode == 0);
+ FSHOW_SIGNAL((stderr,"/create_os_thread: got lock\n"));
+#endif
sigemptyset(&newset);
/* Blocking deferrable signals is enough, no need to block
* SIG_STOP_FOR_GC because the child process is not linked onto
}
r=0;
}
+
#ifdef QUEUE_FREEABLE_THREAD_STACKS
free_freeable_stacks();
#endif
thread_sigmask(SIG_SETMASK,&oldset,0);
+#ifdef LOCK_CREATE_THREAD
+ retcode = pthread_mutex_unlock(&create_thread_lock);
+ gc_assert(retcode == 0);
+ FSHOW_SIGNAL((stderr,"/create_os_thread: released lock\n"));
+#endif
return r;
}
/* Send the signo to os_thread, retry if the rt signal queue is
* full. */
-static int kill_thread_safely(os_thread_t os_thread, int signo)
+int
+kill_thread_safely(os_thread_t os_thread, int signo)
{
int r;
/* The man page does not mention EAGAIN as a valid return value
{
struct thread *p,*th=arch_os_get_current_thread();
int status, lock_ret;
+#ifdef LOCK_CREATE_THREAD
+ /* KLUDGE: Stopping the thread during pthread_create() causes deadlock
+ * on FreeBSD. */
+ FSHOW_SIGNAL((stderr,"/gc_stop_the_world:waiting on create_thread_lock, thread=%lu\n",
+ th->os_thread));
+ lock_ret = pthread_mutex_lock(&create_thread_lock);
+ gc_assert(lock_ret == 0);
+ FSHOW_SIGNAL((stderr,"/gc_stop_the_world:got create_thread_lock, thread=%lu\n",
+ th->os_thread));
+#endif
FSHOW_SIGNAL((stderr,"/gc_stop_the_world:waiting on lock, thread=%lu\n",
th->os_thread));
/* keep threads from starting while the world is stopped. */
lock_ret = pthread_mutex_unlock(&all_threads_lock);
gc_assert(lock_ret == 0);
+#ifdef LOCK_CREATE_THREAD
+ lock_ret = pthread_mutex_unlock(&create_thread_lock);
+ gc_assert(lock_ret == 0);
+#endif
FSHOW_SIGNAL((stderr,"/gc_start_the_world:end\n"));
}