2 * This software is part of the SBCL system. See the README file for
5 * This software is derived from the CMU CL system, which was
6 * written at Carnegie Mellon University and released into the
7 * public domain. The software is in the public domain and is
8 * provided with absolutely no warranty. See the COPYING and CREDITS
9 * files for more information.
12 /* FIXME: Aren't symbols with underscore prefixes supposed to be
13 * reserved for system libraries? Perhaps rename stuff like this
14 * to names like INCLUDED_SBCL_RUNTIME_H. */
15 #ifndef _SBCL_RUNTIME_H_
16 #define _SBCL_RUNTIME_H_
18 #if defined(LISP_FEATURE_WIN32) && defined(LISP_FEATURE_SB_THREAD)
19 # include "pthreads_win32.h"
22 # ifdef LISP_FEATURE_SB_THREAD
29 #if defined(LISP_FEATURE_SB_THREAD)
30 #define thread_self() pthread_self()
31 #define thread_kill pthread_kill
32 #define thread_sigmask pthread_sigmask
33 #define thread_mutex_lock(l) pthread_mutex_lock(l)
34 #define thread_mutex_unlock(l) pthread_mutex_unlock(l)
36 #define thread_self() 0
37 #define thread_kill kill_safely
38 #define thread_sigmask sigprocmask
39 #define thread_mutex_lock(l) 0
40 #define thread_mutex_unlock(l) 0
43 #if defined(LISP_FEATURE_WIN32) && defined(LISP_FEATURE_SB_THREAD)
47 #if defined(LISP_FEATURE_SB_SAFEPOINT)
62 int check_pending_interrupts();
64 void gc_state_wait(gc_phase_t);
65 void gc_state_unlock();
70 * The next few defines serve as configuration -- edit them inline if
71 * you are a developer and want to affect FSHOW behaviour.
74 /* Block blockable interrupts for each SHOW, if not 0.
75 * (On Windows, this setting has no effect.)
77 * In principle, this is a "configuration option", but I am not aware of
78 * any reason why or when it would be advantageous to disable it. */
79 #define QSHOW_SIGNAL_SAFE 1
81 /* Enable extra-verbose low-level debugging output for signals? (You
82 * probably don't want this unless you're trying to debug very early
83 * cold boot on a new machine, or one where you've just messed up
86 * Note: It may be that doing this is fundamentally unsound, since it
87 * causes output from signal handlers, and the i/o libraries aren't
88 * necessarily reentrant. But it can still be very convenient for
89 * figuring out what's going on when you have a signal handling
92 * Possible values are:
93 * 0 -- Never show signal-related output. There is absolutely no
94 * run-time overhead from FSHOW_SIGNAL in this case.
97 * Show signal-related output only if selected at run-time
98 * (otherwise almost no run-time overhead).
100 * 2 -- Unconditionally show signal-related output.
101 * Very significant overhead.
103 * For reasons of tradition, we default to 0 on POSIX and 1 on Windows
106 * With option 1, set up environment variable SBCL_DYNDEBUG to include
107 * "fshow" or "fshow_signal" before starting SBCL to enable output.
109 * There is no particular advantage to option 2 except that you do not
110 * need to set environment variables in this case.
112 #ifdef LISP_FEATURE_SB_QSHOW
113 # define QSHOW_SIGNALS 1
115 # define QSHOW_SIGNALS 0
118 /* Enable low-level debugging output, if not zero. Defaults to enabled
119 * if QSHOW_SIGNALS, disabled otherwise. Change it to 1 or 2 if you want
120 * low-level debugging output but not the whole signal mess. */
121 #define QSHOW QSHOW_SIGNALS
124 * Configuration options end here -- the following defines do not
125 * generally need customization.
128 #define odxprint(topic, fmt, ...) \
130 if (dyndebug_config.dyndebug_##topic) \
131 odxprint_fun(fmt "\n", ##__VA_ARGS__); \
134 void odxprint_fun(const char *fmt, ...);
135 void fshow_fun(void *ignored, const char *fmt, ...);
137 /* Flags defined in a structure to avoid code duplication between
138 * declaration and definition. */
139 extern struct dyndebug_config {
141 int dyndebug_fshow_signal;
142 int dyndebug_gencgc_verbose;
143 int dyndebug_safepoints;
146 int dyndebug_pagefaults;
147 int dyndebug_backtrace_when_lost;
148 int dyndebug_sleep_when_lost;
150 int dyndebug_runtime_link;
153 #ifdef LISP_FEATURE_GENCGC
154 extern int gencgc_verbose;
157 void dyndebug_init(void);
159 #if QSHOW_SIGNAL_SAFE == 1 && !defined(LISP_FEATURE_WIN32)
161 extern sigset_t blockable_sigset;
163 #define QSHOW_BLOCK \
165 thread_sigmask(SIG_BLOCK, &blockable_sigset, &oldset)
166 #define QSHOW_UNBLOCK thread_sigmask(SIG_SETMASK,&oldset,0)
169 #define QSHOW_UNBLOCK
172 /* The following macros duplicate the expansion of odxprint, because the
173 * extra level of parentheses around `args' prevents us from
174 * implementing FSHOW in terms of odxprint directly. (They also differ
179 # define FSHOW(args) \
180 do if (dyndebug_config.dyndebug_fshow) fshow_fun args; while (0)
181 # define SHOW(string) FSHOW((stderr, "/%s\n", string))
184 # define SHOW(string)
188 # define FSHOW_SIGNAL(args) \
189 do if (dyndebug_config.dyndebug_fshow_signal) fshow_fun args; while (0)
191 # define FSHOW_SIGNAL(args)
194 /* KLUDGE: These are in theory machine-dependent and OS-dependent, but
195 * in practice the "foo int" definitions work for all the machines
196 * that SBCL runs on as of 0.6.7. If we port to the Alpha or some
197 * other non-32-bit machine we'll probably need real machine-dependent
198 * and OS-dependent definitions again. */
199 /* even on alpha, int happens to be 4 bytes. long is longer. */
200 /* FIXME: these names really shouldn't reflect their length and this
201 is not quite right for some of the FFI stuff */
202 typedef unsigned long u64;
203 typedef signed long s64;
204 typedef unsigned int u32;
205 typedef signed int s32;
207 /* this is an integral type the same length as a machine pointer */
208 typedef uintptr_t pointer_sized_uint_t;
210 #include <sys/types.h>
212 #if defined(LISP_FEATURE_SB_THREAD)
213 typedef pthread_t os_thread_t;
215 typedef pid_t os_thread_t;
218 typedef uintptr_t uword_t;
219 typedef intptr_t sword_t;
221 /* FIXME: we do things this way because of the alpha32 port. once
222 alpha64 has arrived, all this nastiness can go away */
223 #if 64 == N_WORD_BITS
224 #define LOW_WORD(c) ((pointer_sized_uint_t)c)
225 #define OBJ_FMTX "lx"
226 typedef uintptr_t lispobj;
229 #define LOW_WORD(c) ((long)(c) & 0xFFFFFFFFL)
230 /* fake it on alpha32 */
231 typedef unsigned int lispobj;
235 lowtag_of(lispobj obj)
237 return obj & LOWTAG_MASK;
241 widetag_of(lispobj obj)
243 return obj & WIDETAG_MASK;
246 static inline unsigned long
247 HeaderValue(lispobj obj)
249 return obj >> N_WIDETAG_BITS;
252 static inline struct cons *
255 return (struct cons *)(obj - LIST_POINTER_LOWTAG);
258 static inline struct symbol *
261 return (struct symbol *)(obj - OTHER_POINTER_LOWTAG);
264 static inline struct fdefn *
267 return (struct fdefn *)(obj - OTHER_POINTER_LOWTAG);
270 /* Is the Lisp object obj something with pointer nature (as opposed to
271 * e.g. a fixnum or character or unbound marker)? */
273 is_lisp_pointer(lispobj obj)
275 #if N_WORD_BITS == 64
276 return (obj & 3) == 3;
284 /* Is the Lisp object obj something with immediate nature (e.g. a
285 * fixnum or character or unbound marker)? */
287 is_lisp_immediate(lispobj obj)
290 || (widetag_of(obj) == CHARACTER_WIDETAG)
291 #if N_WORD_BITS == 64
292 || (widetag_of(obj) == SINGLE_FLOAT_WIDETAG)
294 || (widetag_of(obj) == UNBOUND_MARKER_WIDETAG));
297 /* Convert from a lispobj with type bits to a native (ordinary
298 * C/assembly) pointer to the beginning of the object. */
299 static inline lispobj *
300 native_pointer(lispobj obj)
302 return (lispobj *) ((pointer_sized_uint_t) (obj & ~LOWTAG_MASK));
305 /* inverse operation: create a suitably tagged lispobj from a native
306 * pointer or integer.*/
307 static inline lispobj
308 make_lispobj(void *o, int low_tag)
310 return LOW_WORD(o) | low_tag;
313 #define MAKE_FIXNUM(n) (n << N_FIXNUM_TAG_BITS)
314 static inline lispobj
317 return MAKE_FIXNUM(n);
321 fixnum_value(lispobj n)
323 return n >> N_FIXNUM_TAG_BITS;
326 #if defined(LISP_FEATURE_WIN32)
327 /* KLUDGE: Avoid double definition of boolean by rpcndr.h included via
330 * FIXME: We should probably arrange to use the rpcndr.h boolean on Windows,
331 * or get rid of our own boolean type. If the boolean type is only used in
332 * the runtime, and never passed to Lisp, then it doesn't matter which one
335 #define boolean rpcndr_boolean
341 static inline boolean
342 other_immediate_lowtag_p(lispobj header)
344 /* These lowtags are spaced 4 apart throughout the lowtag space. */
345 return (lowtag_of(header) & 3) == OTHER_IMMEDIATE_0_LOWTAG;
348 /* KLUDGE: As far as I can tell there's no ANSI C way of saying
349 * "this function never returns". This is the way that you do it
350 * in GCC later than version 2.5 or so. */
351 #if defined(__GNUC__)
352 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5)
353 #define never_returns __attribute__ ((noreturn))
355 #define never_returns
358 #define never_returns
361 extern void *successful_malloc (size_t size);
362 extern char *copied_string (char *string);
364 #if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_SB_SAFEPOINT)
365 # define THREADS_USING_GCSIGNAL 1
368 /* Now that SPARC has precise GENCGC, several places that used to be
369 * #ifdef PCC need adjustment. Clearly, "PPC or SPARC" is as unhelpful
370 * a test as its reverse, "x86 or x86-64". However, the feature
371 * commonly used to differentiate between those two worlds is
372 * C_STACK_IS_CONTROL_STACK, and clearly (or at least in my humble
373 * opinion), at some point we'd like to have precise GC on x86 while
374 * still sharing the C stack, so stack usage ought not imply GC
375 * conservativeness. So let's have a helper feature that makes the code
376 * a bit more future-proof, even if it is itself currently defined in
378 #if defined(LISP_FEATURE_GENCGC) && !defined(LISP_FEATURE_C_STACK_IS_CONTROL_STACK)
379 # define GENCGC_IS_PRECISE 1
382 void *os_dlsym_default(char *name);
384 #endif /* _SBCL_RUNTIME_H_ */