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)
50 int check_pending_interrupts();
54 * The next few defines serve as configuration -- edit them inline if
55 * you are a developer and want to affect FSHOW behaviour.
58 /* Block blockable interrupts for each SHOW, if not 0.
59 * (On Windows, this setting has no effect.)
61 * In principle, this is a "configuration option", but I am not aware of
62 * any reason why or when it would be advantageous to disable it. */
63 #define QSHOW_SIGNAL_SAFE 1
65 /* Enable extra-verbose low-level debugging output for signals? (You
66 * probably don't want this unless you're trying to debug very early
67 * cold boot on a new machine, or one where you've just messed up
70 * Note: It may be that doing this is fundamentally unsound, since it
71 * causes output from signal handlers, and the i/o libraries aren't
72 * necessarily reentrant. But it can still be very convenient for
73 * figuring out what's going on when you have a signal handling
76 * Possible values are:
77 * 0 -- Never show signal-related output. There is absolutely no
78 * run-time overhead from FSHOW_SIGNAL in this case.
81 * Show signal-related output only if selected at run-time
82 * (otherwise almost no run-time overhead).
84 * 2 -- Unconditionally show signal-related output.
85 * Very significant overhead.
87 * For reasons of tradition, we default to 0 on POSIX and 1 on Windows
90 * With option 1, set up environment variable SBCL_DYNDEBUG to include
91 * "fshow" or "fshow_signal" before starting SBCL to enable output.
93 * There is no particular advantage to option 2 except that you do not
94 * need to set environment variables in this case.
96 #ifdef LISP_FEATURE_SB_QSHOW
97 # define QSHOW_SIGNALS 1
99 # define QSHOW_SIGNALS 0
102 /* Enable low-level debugging output, if not zero. Defaults to enabled
103 * if QSHOW_SIGNALS, disabled otherwise. Change it to 1 or 2 if you want
104 * low-level debugging output but not the whole signal mess. */
105 #define QSHOW QSHOW_SIGNALS
108 * Configuration options end here -- the following defines do not
109 * generally need customization.
112 #define odxprint(topic, fmt, ...) \
114 if (dyndebug_config.dyndebug_##topic) \
115 odxprint_fun(fmt "\n", ##__VA_ARGS__); \
118 void odxprint_fun(const char *fmt, ...);
119 void fshow_fun(void *ignored, const char *fmt, ...);
121 /* Flags defined in a structure to avoid code duplication between
122 * declaration and definition. */
123 extern struct dyndebug_config {
125 int dyndebug_fshow_signal;
126 int dyndebug_gencgc_verbose;
127 int dyndebug_safepoints;
130 int dyndebug_pagefaults;
131 int dyndebug_backtrace_when_lost;
132 int dyndebug_sleep_when_lost;
136 #ifdef LISP_FEATURE_GENCGC
137 extern int gencgc_verbose;
140 void dyndebug_init(void);
142 #if QSHOW_SIGNAL_SAFE == 1 && !defined(LISP_FEATURE_WIN32)
144 extern sigset_t blockable_sigset;
146 #define QSHOW_BLOCK \
148 thread_sigmask(SIG_BLOCK, &blockable_sigset, &oldset)
149 #define QSHOW_UNBLOCK thread_sigmask(SIG_SETMASK,&oldset,0)
152 #define QSHOW_UNBLOCK
155 /* The following macros duplicate the expansion of odxprint, because the
156 * extra level of parentheses around `args' prevents us from
157 * implementing FSHOW in terms of odxprint directly. (They also differ
162 # define FSHOW(args) \
163 do if (dyndebug_config.dyndebug_fshow) fshow_fun args; while (0)
164 # define SHOW(string) FSHOW((stderr, "/%s\n", string))
167 # define SHOW(string)
171 # define FSHOW_SIGNAL(args) \
172 do if (dyndebug_config.dyndebug_fshow_signal) fshow_fun args; while (0)
174 # define FSHOW_SIGNAL(args)
177 /* KLUDGE: These are in theory machine-dependent and OS-dependent, but
178 * in practice the "foo int" definitions work for all the machines
179 * that SBCL runs on as of 0.6.7. If we port to the Alpha or some
180 * other non-32-bit machine we'll probably need real machine-dependent
181 * and OS-dependent definitions again. */
182 /* even on alpha, int happens to be 4 bytes. long is longer. */
183 /* FIXME: these names really shouldn't reflect their length and this
184 is not quite right for some of the FFI stuff */
185 typedef unsigned long u64;
186 typedef signed long s64;
187 typedef unsigned int u32;
188 typedef signed int s32;
190 /* this is an integral type the same length as a machine pointer */
191 typedef unsigned long pointer_sized_uint_t ;
193 #include <sys/types.h>
195 #if defined(LISP_FEATURE_SB_THREAD)
196 typedef pthread_t os_thread_t;
198 typedef pid_t os_thread_t;
201 /* FIXME: we do things this way because of the alpha32 port. once
202 alpha64 has arrived, all this nastiness can go away */
203 #if 64 == N_WORD_BITS
204 #define LOW_WORD(c) ((pointer_sized_uint_t)c)
205 #define OBJ_FMTX "lx"
206 typedef unsigned long lispobj;
209 #define LOW_WORD(c) ((long)(c) & 0xFFFFFFFFL)
210 /* fake it on alpha32 */
211 typedef unsigned int lispobj;
215 lowtag_of(lispobj obj)
217 return obj & LOWTAG_MASK;
221 widetag_of(lispobj obj)
223 return obj & WIDETAG_MASK;
226 static inline unsigned long
227 HeaderValue(lispobj obj)
229 return obj >> N_WIDETAG_BITS;
232 static inline struct cons *
235 return (struct cons *)(obj - LIST_POINTER_LOWTAG);
238 static inline struct symbol *
241 return (struct symbol *)(obj - OTHER_POINTER_LOWTAG);
244 static inline struct fdefn *
247 return (struct fdefn *)(obj - OTHER_POINTER_LOWTAG);
250 /* Is the Lisp object obj something with pointer nature (as opposed to
251 * e.g. a fixnum or character or unbound marker)? */
253 is_lisp_pointer(lispobj obj)
255 #if N_WORD_BITS == 64
256 return (obj & 3) == 3;
264 /* Is the Lisp object obj something with immediate nature (e.g. a
265 * fixnum or character or unbound marker)? */
267 is_lisp_immediate(lispobj obj)
270 || (widetag_of(obj) == CHARACTER_WIDETAG)
271 #if N_WORD_BITS == 64
272 || (widetag_of(obj) == SINGLE_FLOAT_WIDETAG)
274 || (widetag_of(obj) == UNBOUND_MARKER_WIDETAG));
277 /* Convert from a lispobj with type bits to a native (ordinary
278 * C/assembly) pointer to the beginning of the object. */
279 static inline lispobj *
280 native_pointer(lispobj obj)
282 return (lispobj *) ((pointer_sized_uint_t) (obj & ~LOWTAG_MASK));
285 /* inverse operation: create a suitably tagged lispobj from a native
286 * pointer or integer.*/
287 static inline lispobj
288 make_lispobj(void *o, int low_tag)
290 return LOW_WORD(o) | low_tag;
293 #define MAKE_FIXNUM(n) (n << N_FIXNUM_TAG_BITS)
294 static inline lispobj
297 return MAKE_FIXNUM(n);
301 fixnum_value(lispobj n)
303 return n >> N_FIXNUM_TAG_BITS;
306 #if defined(LISP_FEATURE_WIN32)
307 /* KLUDGE: Avoid double definition of boolean by rpcndr.h included via
310 * FIXME: We should probably arrange to use the rpcndr.h boolean on Windows,
311 * or get rid of our own boolean type. If the boolean type is only used in
312 * the runtime, and never passed to Lisp, then it doesn't matter which one
315 #define boolean rpcndr_boolean
321 static inline boolean
322 other_immediate_lowtag_p(lispobj header)
324 /* These lowtags are spaced 4 apart throughout the lowtag space. */
325 return (lowtag_of(header) & 3) == OTHER_IMMEDIATE_0_LOWTAG;
328 /* KLUDGE: As far as I can tell there's no ANSI C way of saying
329 * "this function never returns". This is the way that you do it
330 * in GCC later than version 2.5 or so. */
331 #if defined(__GNUC__)
332 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5)
333 #define never_returns __attribute__ ((noreturn))
335 #define never_returns
338 #define never_returns
341 extern void *successful_malloc (size_t size);
342 extern char *copied_string (char *string);
344 #if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_SB_SAFEPOINT)
345 # define THREADS_USING_GCSIGNAL 1
348 /* Now that SPARC has precise GENCGC, several places that used to be
349 * #ifdef PCC need adjustment. Clearly, "PPC or SPARC" is as unhelpful
350 * a test as its reverse, "x86 or x86-64". However, the feature
351 * commonly used to differentiate between those two worlds is
352 * C_STACK_IS_CONTROL_STACK, and clearly (or at least in my humble
353 * opinion), at some point we'd like to have precise GC on x86 while
354 * still sharing the C stack, so stack usage ought not imply GC
355 * conservativeness. So let's have a helper feature that makes the code
356 * a bit more future-proof, even if it is itself currently defined in
358 #if defined(LISP_FEATURE_GENCGC) && !defined(LISP_FEATURE_C_STACK_IS_CONTROL_STACK)
359 # define GENCGC_IS_PRECISE 1
362 #endif /* _SBCL_RUNTIME_H_ */