#include "os.h"
#ifdef LISP_FEATURE_GENCGC
#include "gencgc-alloc-region.h"
-#else
-struct alloc_region { };
+#endif
+#ifdef LISP_FEATURE_WIN32
+#include "win32-thread-private-events.h"
#endif
#include "genesis/symbol.h"
#include "genesis/static-symbols.h"
#include "genesis/thread.h"
#include "genesis/fdefn.h"
#include "interrupt.h"
+#include "validate.h" /* for BINDING_STACK_SIZE etc */
#define STATE_RUNNING MAKE_FIXNUM(1)
#define STATE_STOPPED MAKE_FIXNUM(2)
#define STATE_DEAD MAKE_FIXNUM(3)
+#if defined(LISP_FEATURE_SB_SAFEPOINT)
+# define STATE_SUSPENDED_BRIEFLY MAKE_FIXNUM(4)
+# define STATE_GC_BLOCKER MAKE_FIXNUM(5)
+# define STATE_PHASE1_BLOCKER MAKE_FIXNUM(5)
+# define STATE_PHASE2_BLOCKER MAKE_FIXNUM(6)
+# define STATE_INTERRUPT_BLOCKER MAKE_FIXNUM(7)
+#endif
#ifdef LISP_FEATURE_SB_THREAD
lispobj thread_state(struct thread *thread);
void set_thread_state(struct thread *thread, lispobj state);
void wait_for_thread_state_change(struct thread *thread, lispobj state);
+
+#if defined(LISP_FEATURE_SB_SAFEPOINT)
+enum threads_suspend_reason {
+ SUSPEND_REASON_NONE,
+ SUSPEND_REASON_GC,
+ SUSPEND_REASON_INTERRUPT,
+ SUSPEND_REASON_GCING
+};
+
+struct threads_suspend_info {
+ int suspend;
+ pthread_mutex_t world_lock;
+ pthread_mutex_t lock;
+ enum threads_suspend_reason reason;
+ int phase;
+ struct thread * gc_thread;
+ struct thread * interrupted_thread;
+ int blockers;
+ int used_gc_page;
+};
+
+struct suspend_phase {
+ int suspend;
+ enum threads_suspend_reason reason;
+ int phase;
+ struct suspend_phase *next;
+};
+
+extern struct threads_suspend_info suspend_info;
+
+struct gcing_safety {
+ lispobj csp_around_foreign_call;
+#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
+ lispobj* pc_around_foreign_call;
+#endif
+};
+
+int handle_safepoint_violation(os_context_t *context, os_vm_address_t addr);
+void** os_get_csp(struct thread* th);
+void alloc_gc_page();
+void assert_on_stack(struct thread *th, void *esp);
+#endif /* defined(LISP_FEATURE_SB_SAFEPOINT) */
+
extern pthread_key_t lisp_thread;
#endif
lispobj dynamic_values[1]; /* actually more like 4000 or so */
};
+/* A helper structure for data local to a thread, which is not pointer-sized.
+ *
+ * Originally, all layouting of these fields was done manually in C code
+ * with pointer arithmetic. We let the C compiler figure it out now.
+ *
+ * (Why is this not part of `struct thread'? Because that structure is
+ * declared using genesis, and we would run into issues with fields that
+ * are of unknown length.)
+ */
+struct nonpointer_thread_data
+{
+#if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_SB_SAFEPOINT)
+ os_sem_t state_sem;
+ os_sem_t state_not_running_sem;
+ os_sem_t state_not_stopped_sem;
+#else
+ /* An unused field follows, to ensure that the struct is non-empty
+ * for non-GCC compilers. */
+ int unused;
+#endif
+};
+
extern struct thread *all_threads;
extern int dynamic_values_bytes;
#define access_control_frame_pointer(thread) \
((thread)->control_frame_pointer)
# endif
-#elif defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+#else
+# if defined(BINDING_STACK_POINTER)
#define get_binding_stack_pointer(thread) \
SymbolValue(BINDING_STACK_POINTER, thread)
#define set_binding_stack_pointer(thread,value) \
SetSymbolValue(BINDING_STACK_POINTER, (lispobj)(value), thread)
-#define access_control_stack_pointer(thread) \
- (current_control_stack_pointer)
-#else
+# else
#define get_binding_stack_pointer(thread) \
(current_binding_stack_pointer)
#define set_binding_stack_pointer(thread,value) \
(current_binding_stack_pointer = (lispobj *)(value))
-#define access_control_stack_pointer(thread) \
+# endif
+#define access_control_stack_pointer(thread) \
(current_control_stack_pointer)
+# if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
#define access_control_frame_pointer(thread) \
(current_control_frame_pointer)
+# endif
#endif
#if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_GCC_TLS)
extern __thread struct thread *current_thread;
#endif
+#ifndef LISP_FEATURE_SB_SAFEPOINT
+# define THREAD_CSP_PAGE_SIZE 0
+#elif defined(LISP_FEATURE_PPC)
+ /* BACKEND_PAGE_BYTES is nice and large on this platform, but therefore
+ * does not fit into an immediate, making it awkward to access the page
+ * relative to the thread-tn... */
+# define THREAD_CSP_PAGE_SIZE 4096
+#else
+# define THREAD_CSP_PAGE_SIZE BACKEND_PAGE_BYTES
+#endif
+
+#ifdef LISP_FEATURE_WIN32
+/*
+ * Win32 doesn't have SIGSTKSZ, and we're not switching stacks anyway,
+ * so define it arbitrarily
+ */
+#define SIGSTKSZ 1024
+#endif
+
+#define THREAD_STRUCT_SIZE (thread_control_stack_size + BINDING_STACK_SIZE + \
+ ALIEN_STACK_SIZE + \
+ sizeof(struct nonpointer_thread_data) + \
+ dynamic_values_bytes + \
+ 32 * SIGSTKSZ + \
+ THREAD_ALIGNMENT_BYTES + \
+ THREAD_CSP_PAGE_SIZE)
+
+#if defined(LISP_FEATURE_WIN32)
+static inline struct thread* arch_os_get_current_thread()
+ __attribute__((__const__));
+#endif
+
/* This is clearly per-arch and possibly even per-OS code, but we can't
* put it somewhere sensible like x86-linux-os.c because it needs too
* much stuff like struct thread and all_threads to be defined, which
static inline struct thread *arch_os_get_current_thread(void)
{
-#if defined(LISP_FEATURE_SB_THREAD)
-#if defined(LISP_FEATURE_X86)
+#if !defined(LISP_FEATURE_SB_THREAD)
+ return all_threads;
+
+#elif defined(LISP_FEATURE_X86) && defined(LISP_FEATURE_WIN32)
register struct thread *me=0;
- if(all_threads) {
-#if defined(LISP_FEATURE_DARWIN) && defined(LISP_FEATURE_RESTORE_FS_SEGMENT_REGISTER_FROM_TLS)
- sel_t sel;
- struct thread *th = pthread_getspecific(specials);
- sel.index = th->tls_cookie;
- sel.rpl = USER_PRIV;
- sel.ti = SEL_LDT;
- __asm__ __volatile__ ("movw %w0, %%fs" : : "r"(sel));
-#elif defined(LISP_FEATURE_FREEBSD)
-#ifdef LISP_FEATURE_GCC_TLS
- struct thread *th = current_thread;
+ __asm__ ("movl %%fs:0xE10+(4*63), %0" : "=r"(me) :);
+ return me;
+
#else
- struct thread *th = pthread_getspecific(specials);
+
+# if defined(LISP_FEATURE_X86)
+ if (!all_threads) return 0;
#endif
-#ifdef LISP_FEATURE_RESTORE_TLS_SEGMENT_REGISTER_FROM_TLS
- unsigned int sel = LSEL(th->tls_cookie, SEL_UPL);
- unsigned int fs = rfs();
- /* Load FS only if it's necessary. Modifying a selector
- * causes privilege checking and it takes long time. */
- if (fs != sel)
- load_fs(sel);
+ /* Otherwise, use pthreads to find the right value. We do not load
+ * directly from %fs:this even on x86 platforms (like Linux and
+ * Solaris) with dependable %fs, because we want to return NULL if
+ * called by a non-Lisp thread, and %fs would not be initialized
+ * suitably in that case. */
+ struct thread *th;
+# ifdef LISP_FEATURE_GCC_TLS
+ th = current_thread;
+# else
+ th = pthread_getspecific(specials);
+# endif
+
+# if defined(LISP_FEATURE_RESTORE_FS_SEGMENT_REGISTER_FROM_TLS)
+ /* If enabled by make-config (currently Darwin and FreeBSD only),
+ * re-setup %fs. This is an out-of-line call, and potentially
+ * expensive.*/
+ if (th)
+ arch_os_load_ldt(th);
+# endif
+
+ return th;
#endif
- return th;
+}
+
+#if defined(LISP_FEATURE_MACH_EXCEPTION_HANDLER)
+extern kern_return_t mach_lisp_thread_init(struct thread *thread);
+extern kern_return_t mach_lisp_thread_destroy(struct thread *thread);
#endif
- __asm__ __volatile__ ("movl %%fs:%c1,%0" : "=r" (me)
- : "i" (offsetof (struct thread,this)));
- }
- return me;
-#else
-#ifdef LISP_FEATURE_GCC_TLS
- return current_thread;
-#else
- return pthread_getspecific(specials);
+
+typedef struct init_thread_data {
+ sigset_t oldset;
+#ifdef LISP_FEATURE_SB_SAFEPOINT
+ struct gcing_safety safety;
#endif
-#endif /* x86 */
-#else
- return all_threads;
+} init_thread_data;
+
+#ifdef LISP_FEATURE_SB_SAFEPOINT
+void thread_in_safety_transition(os_context_t *ctx);
+void thread_in_lisp_raised(os_context_t *ctx);
+void thread_interrupted(os_context_t *ctx);
+void thread_pitstop(os_context_t *ctxptr);
+extern void thread_register_gc_trigger();
+
+# ifdef LISP_FEATURE_SB_THRUPTION
+int wake_thread(os_thread_t os_thread);
+# ifdef LISP_FEATURE_WIN32
+void wake_thread_win32(struct thread *thread);
+# else
+int wake_thread_posix(os_thread_t os_thread);
+# endif
+# endif
+
+static inline
+void push_gcing_safety(struct gcing_safety *into)
+{
+ struct thread* th = arch_os_get_current_thread();
+ asm volatile ("");
+ if ((into->csp_around_foreign_call =
+ *th->csp_around_foreign_call)) {
+ *th->csp_around_foreign_call = 0;
+ asm volatile ("");
+#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
+ into->pc_around_foreign_call = th->pc_around_foreign_call;
+ th->pc_around_foreign_call = 0;
+ asm volatile ("");
#endif
+ } else {
+#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
+ into->pc_around_foreign_call = 0;
+#endif
+ }
}
-#if defined(LISP_FEATURE_MACH_EXCEPTION_HANDLER)
-#define THREAD_STRUCT_TO_EXCEPTION_PORT(th) ((mach_port_t) th)
-#define EXCEPTION_PORT_TO_THREAD_STRUCT(th) ((struct thread *) th)
+static inline
+void pop_gcing_safety(struct gcing_safety *from)
+{
+ struct thread* th = arch_os_get_current_thread();
+ if (from->csp_around_foreign_call) {
+ asm volatile ("");
+ *th->csp_around_foreign_call = from->csp_around_foreign_call;
+ asm volatile ("");
+#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
+ th->pc_around_foreign_call = from->pc_around_foreign_call;
+ asm volatile ("");
+#endif
+ }
+}
+
+/* Even with just -O1, gcc optimizes the jumps in this "loop" away
+ * entirely, giving the ability to define WITH-FOO-style macros. */
+#define RUN_BODY_ONCE(prefix, finally_do) \
+ int prefix##done = 0; \
+ for (; !prefix##done; finally_do, prefix##done = 1)
+
+#define WITH_GC_AT_SAFEPOINTS_ONLY_hygenic(var) \
+ struct gcing_safety var; \
+ push_gcing_safety(&var); \
+ RUN_BODY_ONCE(var, pop_gcing_safety(&var))
+
+#define WITH_GC_AT_SAFEPOINTS_ONLY() \
+ WITH_GC_AT_SAFEPOINTS_ONLY_hygenic(sbcl__gc_safety)
+
+#define WITH_STATE_SEM_hygenic(var, thread) \
+ os_sem_wait((thread)->state_sem, "thread_state"); \
+ RUN_BODY_ONCE(var, os_sem_post((thread)->state_sem, "thread_state"))
+
+#define WITH_STATE_SEM(thread) \
+ WITH_STATE_SEM_hygenic(sbcl__state_sem, thread)
+
+int check_pending_thruptions(os_context_t *ctx);
+
+void attach_os_thread(init_thread_data *);
+void detach_os_thread(init_thread_data *);
+
+# if defined(LISP_FEATURE_SB_SAFEPOINT_STRICTLY) && !defined(LISP_FEATURE_WIN32)
+
+void signal_handler_callback(lispobj, int, void *, void *);
+# endif
+
#endif
extern void create_initial_thread(lispobj);
+#ifdef LISP_FEATURE_SB_THREAD
+extern pthread_mutex_t all_threads_lock;
+#endif
+
#endif /* _INCLUDE_THREAD_H_ */
projects / sbcl.git / blobdiff