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 #ifndef LISP_FEATURE_WIN32
13 #include <sys/types.h>
31 #include "gc-internal.h"
34 #include "genesis/static-symbols.h"
35 #include "genesis/symbol.h"
37 #if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_LUTEX)
38 #include "genesis/lutex.h"
41 /* write_runtime_options uses a simple serialization scheme that
42 * consists of one word of magic, one word indicating whether options
43 * are actually saved, and one word per struct field. */
45 write_runtime_options(FILE *file
, struct runtime_options
*options
)
47 size_t optarray
[RUNTIME_OPTIONS_WORDS
];
49 memset(&optarray
, 0, sizeof(optarray
));
50 optarray
[0] = RUNTIME_OPTIONS_MAGIC
;
52 if (options
!= NULL
) {
53 /* optarray[1] is a flag indicating that options are present */
55 optarray
[2] = options
->dynamic_space_size
;
56 optarray
[3] = options
->thread_control_stack_size
;
59 fwrite(optarray
, sizeof(size_t), RUNTIME_OPTIONS_WORDS
, file
);
63 write_lispobj(lispobj obj
, FILE *file
)
65 fwrite(&obj
, sizeof(lispobj
), 1, file
);
69 write_bytes(FILE *file
, char *addr
, long bytes
, os_vm_offset_t file_offset
)
71 long count
, here
, data
;
73 bytes
= (bytes
+os_vm_page_size
-1)&~(os_vm_page_size
-1);
75 #ifdef LISP_FEATURE_WIN32
76 /* touch every single page in the space to force it to be mapped. */
77 for (count
= 0; count
< bytes
; count
+= 0x1000) {
78 volatile int temp
= addr
[count
];
84 fseek(file
, 0, SEEK_END
);
85 data
= (ftell(file
)+os_vm_page_size
-1)&~(os_vm_page_size
-1);
86 fseek(file
, data
, SEEK_SET
);
89 count
= fwrite(addr
, 1, bytes
, file
);
95 perror("error writing to save file");
100 fseek(file
, here
, SEEK_SET
);
101 return ((data
- file_offset
) / os_vm_page_size
) - 1;
104 #if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_LUTEX)
105 /* saving lutexes in the core */
106 static void **lutex_addresses
;
107 static long n_lutexes
= 0;
108 static long max_lutexes
= 0;
111 default_scan_action(lispobj
*obj
)
113 return (sizetab
[widetag_of(*obj
)])(obj
);
117 lutex_scan_action(lispobj
*obj
)
119 /* note the address of the lutex */
120 if(n_lutexes
>= max_lutexes
) {
122 lutex_addresses
= realloc(lutex_addresses
, max_lutexes
* sizeof(void *));
123 gc_assert(lutex_addresses
);
126 lutex_addresses
[n_lutexes
++] = obj
;
128 return (*sizetab
[widetag_of(*obj
)])(obj
);
131 typedef long (*scan_table
[256])(lispobj
*obj
);
134 scan_objects(lispobj
*start
, long n_words
, scan_table table
)
136 lispobj
*end
= start
+ n_words
;
138 long n_words_scanned
;
139 for (object_ptr
= start
;
141 object_ptr
+= n_words_scanned
) {
142 lispobj obj
= *object_ptr
;
144 n_words_scanned
= (table
[widetag_of(obj
)])(object_ptr
);
149 scan_for_lutexes(lispobj
*addr
, long n_words
)
151 static int initialized
= 0;
152 static scan_table lutex_scan_table
;
157 /* allocate a little space to get started */
158 lutex_addresses
= malloc(16*sizeof(void *));
159 gc_assert(lutex_addresses
);
162 /* initialize the mapping table */
163 for(i
= 0; i
< ((sizeof lutex_scan_table
)/(sizeof lutex_scan_table
[0])); ++i
) {
164 lutex_scan_table
[i
] = default_scan_action
;
167 lutex_scan_table
[LUTEX_WIDETAG
] = lutex_scan_action
;
173 scan_objects(addr
, n_words
, lutex_scan_table
);
178 output_space(FILE *file
, int id
, lispobj
*addr
, lispobj
*end
, os_vm_offset_t file_offset
)
180 size_t words
, bytes
, data
;
181 static char *names
[] = {NULL
, "dynamic", "static", "read-only"};
183 write_lispobj(id
, file
);
185 write_lispobj(words
, file
);
187 bytes
= words
* sizeof(lispobj
);
189 #if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_LUTEX)
190 printf("scanning space for lutexes...\n");
191 scan_for_lutexes((char *)addr
, words
);
194 printf("writing %lu bytes from the %s space at 0x%08lx\n",
195 (unsigned long)bytes
, names
[id
], (unsigned long)addr
);
197 data
= write_bytes(file
, (char *)addr
, bytes
, file_offset
);
199 write_lispobj(data
, file
);
200 write_lispobj((long)addr
/ os_vm_page_size
, file
);
201 write_lispobj((bytes
+ os_vm_page_size
- 1) / os_vm_page_size
, file
);
205 open_core_for_saving(char *filename
)
207 /* Open the output file. We don't actually need the file yet, but
208 * the fopen() might fail for some reason, and we want to detect
209 * that and back out before we do anything irreversible. */
211 return fopen(filename
, "wb");
215 save_to_filehandle(FILE *file
, char *filename
, lispobj init_function
,
216 boolean make_executable
,
217 boolean save_runtime_options
)
220 os_vm_offset_t core_start_pos
;
222 /* Smash the enclosing state. (Once we do this, there's no good
223 * way to go back, which is a sufficient reason that this ends up
224 * being SAVE-LISP-AND-DIE instead of SAVE-LISP-AND-GO-ON). */
225 printf("[undoing binding stack and other enclosing state... ");
227 for_each_thread(th
) { /* XXX really? */
228 unbind_to_here((lispobj
*)th
->binding_stack_start
,th
);
229 SetSymbolValue(CURRENT_CATCH_BLOCK
, 0,th
);
230 SetSymbolValue(CURRENT_UNWIND_PROTECT_BLOCK
, 0,th
);
235 /* (Now we can actually start copying ourselves into the output file.) */
237 printf("[saving current Lisp image into %s:\n", filename
);
240 core_start_pos
= ftell(file
);
241 write_lispobj(CORE_MAGIC
, file
);
243 write_lispobj(VERSION_CORE_ENTRY_TYPE_CODE
, file
);
244 write_lispobj(3, file
);
245 write_lispobj(SBCL_CORE_VERSION_INTEGER
, file
);
247 write_lispobj(BUILD_ID_CORE_ENTRY_TYPE_CODE
, file
);
248 write_lispobj(/* (We're writing the word count of the entry here, and the 2
249 * term is one word for the leading BUILD_ID_CORE_ENTRY_TYPE_CODE
250 * word and one word where we store the count itself.) */
251 2 + strlen((const char *)build_id
),
255 for (p
= (unsigned char *)build_id
; *p
; ++p
)
256 write_lispobj(*p
, file
);
259 write_lispobj(NEW_DIRECTORY_CORE_ENTRY_TYPE_CODE
, file
);
260 write_lispobj(/* (word count = 3 spaces described by 5 words each, plus the
261 * entry type code, plus this count itself) */
264 READ_ONLY_CORE_SPACE_ID
,
265 (lispobj
*)READ_ONLY_SPACE_START
,
266 (lispobj
*)SymbolValue(READ_ONLY_SPACE_FREE_POINTER
,0),
269 STATIC_CORE_SPACE_ID
,
270 (lispobj
*)STATIC_SPACE_START
,
271 (lispobj
*)SymbolValue(STATIC_SPACE_FREE_POINTER
,0),
273 #ifdef LISP_FEATURE_GENCGC
274 /* Flush the current_region, updating the tables. */
275 gc_alloc_update_all_page_tables();
276 update_dynamic_space_free_pointer();
279 #ifdef LISP_FEATURE_GENCGC
281 DYNAMIC_CORE_SPACE_ID
,
282 (lispobj
*)DYNAMIC_SPACE_START
,
283 dynamic_space_free_pointer
,
287 DYNAMIC_CORE_SPACE_ID
,
288 (lispobj
*)current_dynamic_space
,
289 dynamic_space_free_pointer
,
294 DYNAMIC_CORE_SPACE_ID
,
295 (lispobj
*)DYNAMIC_SPACE_START
,
296 (lispobj
*)SymbolValue(ALLOCATION_POINTER
,0),
300 write_lispobj(INITIAL_FUN_CORE_ENTRY_TYPE_CODE
, file
);
301 write_lispobj(3, file
);
302 write_lispobj(init_function
, file
);
304 #ifdef LISP_FEATURE_GENCGC
306 size_t size
= (last_free_page
*sizeof(long)+os_vm_page_size
-1)
307 &~(os_vm_page_size
-1);
308 unsigned long *data
= calloc(size
, 1);
312 for (i
= 0; i
< last_free_page
; i
++) {
313 data
[i
] = page_table
[i
].region_start_offset
;
315 write_lispobj(PAGE_TABLE_CORE_ENTRY_TYPE_CODE
, file
);
316 write_lispobj(4, file
);
317 write_lispobj(size
, file
);
318 offset
= write_bytes(file
, (char *) data
, size
, core_start_pos
);
319 write_lispobj(offset
, file
);
324 #if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_LUTEX)
327 printf("writing %ld lutexes to the core...\n", n_lutexes
);
328 write_lispobj(LUTEX_TABLE_CORE_ENTRY_TYPE_CODE
, file
);
329 /* word count of the entry */
330 write_lispobj(4, file
);
331 /* indicate how many lutexes we saved */
332 write_lispobj(n_lutexes
, file
);
333 /* save the lutexes */
334 offset
= write_bytes(file
, (char *) lutex_addresses
,
335 n_lutexes
* sizeof(*lutex_addresses
),
338 write_lispobj(offset
, file
);
342 write_lispobj(END_CORE_ENTRY_TYPE_CODE
, file
);
344 /* Write a trailing header, ignored when parsing the core normally.
345 * This is used to locate the start of the core when the runtime is
346 * prepended to it. */
347 fseek(file
, 0, SEEK_END
);
349 /* If NULL runtime options are passed to write_runtime_options,
350 * command-line processing is performed as normal in the SBCL
351 * executable. Otherwise, the saved runtime options are used and
352 * all command-line arguments are available to Lisp in
353 * SB-EXT:*POSIX-ARGV*. */
354 write_runtime_options(file
,
355 (save_runtime_options
? runtime_options
: NULL
));
357 fwrite(&core_start_pos
, sizeof(os_vm_offset_t
), 1, file
);
358 write_lispobj(CORE_MAGIC
, file
);
361 #ifndef LISP_FEATURE_WIN32
363 chmod (filename
, 0755);
370 /* Slurp the executable portion of the runtime into a malloced buffer
371 * and return it. Places the size in bytes of the runtime into
372 * 'size_out'. Returns NULL if the runtime cannot be loaded from
375 load_runtime(char *runtime_path
, size_t *size_out
)
380 os_vm_offset_t core_offset
;
382 core_offset
= search_for_embedded_core (runtime_path
);
383 if ((input
= fopen(runtime_path
, "rb")) == NULL
) {
384 fprintf(stderr
, "Unable to open runtime: %s\n", runtime_path
);
388 fseek(input
, 0, SEEK_END
);
389 size
= (size_t) ftell(input
);
390 fseek(input
, 0, SEEK_SET
);
392 if (core_offset
!= -1 && size
> core_offset
)
395 buf
= successful_malloc(size
);
396 if ((count
= fread(buf
, 1, size
, input
)) != size
) {
397 fprintf(stderr
, "Premature EOF while reading runtime.\n");
414 save_runtime_to_filehandle(FILE *output
, void *runtime
, size_t runtime_size
)
419 fwrite(runtime
, 1, runtime_size
, output
);
421 padding
= (os_vm_page_size
- (runtime_size
% os_vm_page_size
)) & ~os_vm_page_size
;
423 padbytes
= successful_malloc(padding
);
424 memset(padbytes
, 0, padding
);
425 fwrite(padbytes
, 1, padding
, output
);
433 prepare_to_save(char *filename
, boolean prepend_runtime
, void **runtime_bytes
,
434 size_t *runtime_size
)
439 if (prepend_runtime
) {
440 runtime_path
= os_get_runtime_executable_path();
442 if (runtime_path
== NULL
) {
443 fprintf(stderr
, "Unable to get default runtime path.\n");
447 *runtime_bytes
= load_runtime(runtime_path
, runtime_size
);
450 if (*runtime_bytes
== NULL
)
454 file
= open_core_for_saving(filename
);
456 free(*runtime_bytes
);
465 save(char *filename
, lispobj init_function
, boolean prepend_runtime
,
466 boolean save_runtime_options
)
469 void *runtime_bytes
= NULL
;
472 file
= prepare_to_save(filename
, prepend_runtime
, &runtime_bytes
, &runtime_size
);
477 save_runtime_to_filehandle(file
, runtime_bytes
, runtime_size
);
479 return save_to_filehandle(file
, filename
, init_function
, prepend_runtime
,
480 save_runtime_options
);