2 * A saved SBCL system is a .core file; the code here helps us accept
3 * such a file as input.
7 * This software is part of the SBCL system. See the README file for
10 * This software is derived from the CMU CL system, which was
11 * written at Carnegie Mellon University and released into the
12 * public domain. The software is in the public domain and is
13 * provided with absolutely no warranty. See the COPYING and CREDITS
14 * files for more information.
21 #include <sys/types.h>
36 #include "gc-internal.h"
39 #if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_LUTEX)
40 #include "genesis/sap.h"
44 unsigned char build_id
[] =
45 #include "../../output/build-id.tmp"
49 open_binary(char *filename
, int mode
)
51 #ifdef LISP_FEATURE_WIN32
55 return open(filename
, mode
);
58 /* Search 'filename' for an embedded core. An SBCL core has, at the
59 * end of the file, a trailer containing the size of the core (an
60 * os_vm_offset_t) and a final signature word (the lispobj
61 * CORE_MAGIC). If this trailer is found at the end of the file, the
62 * start of the core can be determined from the core size.
64 * If an embedded core is present, this returns the offset into the
65 * file to load the core from, or -1 if no core is present. */
67 search_for_embedded_core(char *filename
)
70 os_vm_offset_t lispobj_size
= sizeof(lispobj
);
71 os_vm_offset_t trailer_size
= lispobj_size
+ sizeof(os_vm_offset_t
);
72 os_vm_offset_t core_size
, pos
;
75 if ((fd
= open_binary(filename
, O_RDONLY
)) < 0)
77 if (lseek(fd
, -lispobj_size
, SEEK_END
) < 0)
79 if (read(fd
, &header
, (size_t)lispobj_size
) < lispobj_size
)
82 if (header
== CORE_MAGIC
) {
83 if (lseek(fd
, -trailer_size
, SEEK_END
) < 0)
85 if (read(fd
, &core_size
, sizeof(os_vm_offset_t
)) < 0)
88 if (lseek(fd
, -(core_size
+ trailer_size
), SEEK_END
) < 0)
90 pos
= lseek(fd
, 0, SEEK_CUR
);
92 if (read(fd
, &header
, (size_t)lispobj_size
) < lispobj_size
)
95 if (header
!= CORE_MAGIC
)
110 process_directory(int fd
, lispobj
*ptr
, int count
, os_vm_offset_t file_offset
)
112 struct ndir_entry
*entry
;
114 FSHOW((stderr
, "/process_directory(..), count=%d\n", count
));
116 for (entry
= (struct ndir_entry
*) ptr
; --count
>= 0; ++entry
) {
118 long id
= entry
->identifier
;
119 long offset
= os_vm_page_size
* (1 + entry
->data_page
);
120 os_vm_address_t addr
=
121 (os_vm_address_t
) (os_vm_page_size
* entry
->address
);
122 lispobj
*free_pointer
= (lispobj
*) addr
+ entry
->nwords
;
123 long len
= os_vm_page_size
* entry
->page_count
;
126 os_vm_address_t real_addr
;
127 FSHOW((stderr
, "/mapping %ld(0x%lx) bytes at 0x%lx\n",
128 (long)len
, (long)len
, (unsigned long)addr
));
129 real_addr
= os_map(fd
, offset
+ file_offset
, addr
, len
);
130 if (real_addr
!= addr
) {
131 lose("file mapped in wrong place! "
132 "(0x%08x != 0x%08lx)\n",
138 FSHOW((stderr
, "/space id = %ld, free pointer = 0x%lx\n",
139 id
, (unsigned long)free_pointer
));
142 case DYNAMIC_CORE_SPACE_ID
:
143 if (len
> dynamic_space_size
) {
145 "dynamic space too small for core: %ldKiB required, %ldKiB available.\n",
147 (long)dynamic_space_size
>> 10);
150 #ifdef LISP_FEATURE_GENCGC
151 if (addr
!= (os_vm_address_t
)DYNAMIC_SPACE_START
) {
152 fprintf(stderr
, "in core: 0x%lx; in runtime: 0x%lx \n",
153 (long)addr
, (long)DYNAMIC_SPACE_START
);
154 lose("core/runtime address mismatch: DYNAMIC_SPACE_START\n");
157 if ((addr
!= (os_vm_address_t
)DYNAMIC_0_SPACE_START
) &&
158 (addr
!= (os_vm_address_t
)DYNAMIC_1_SPACE_START
)) {
159 fprintf(stderr
, "in core: 0x%lx; in runtime: 0x%lx or 0x%lx\n",
161 (long)DYNAMIC_0_SPACE_START
,
162 (long)DYNAMIC_1_SPACE_START
);
163 lose("warning: core/runtime address mismatch: DYNAMIC_SPACE_START\n");
166 #if defined(ALLOCATION_POINTER)
167 SetSymbolValue(ALLOCATION_POINTER
, (lispobj
)free_pointer
,0);
169 dynamic_space_free_pointer
= free_pointer
;
171 /* For stop-and-copy GC, this will be whatever the GC was
172 * using at the time. With GENCGC, this will always be
173 * space 0. (We checked above that for GENCGC,
174 * addr==DYNAMIC_SPACE_START.) */
175 current_dynamic_space
= (lispobj
*)addr
;
177 case STATIC_CORE_SPACE_ID
:
178 if (addr
!= (os_vm_address_t
)STATIC_SPACE_START
) {
179 fprintf(stderr
, "in core: 0x%lx - in runtime: 0x%lx\n",
180 (long)addr
, (long)STATIC_SPACE_START
);
181 lose("core/runtime address mismatch: STATIC_SPACE_START\n");
184 case READ_ONLY_CORE_SPACE_ID
:
185 if (addr
!= (os_vm_address_t
)READ_ONLY_SPACE_START
) {
186 fprintf(stderr
, "in core: 0x%lx - in runtime: 0x%lx\n",
187 (long)addr
, (long)READ_ONLY_SPACE_START
);
188 lose("core/runtime address mismatch: READ_ONLY_SPACE_START\n");
192 lose("unknown space ID %ld addr 0x%lx\n", id
, (long)addr
);
198 load_core_file(char *file
, os_vm_offset_t file_offset
)
200 lispobj
*header
, val
, len
, *ptr
, remaining_len
;
201 int fd
= open_binary(file
, O_RDONLY
), count
;
203 lispobj initial_function
= NIL
;
204 FSHOW((stderr
, "/entering load_core_file(%s)\n", file
));
206 fprintf(stderr
, "could not open file \"%s\"\n", file
);
211 lseek(fd
, file_offset
, SEEK_SET
);
212 header
= calloc(os_vm_page_size
/ sizeof(u32
), sizeof(u32
));
214 count
= read(fd
, header
, os_vm_page_size
);
215 if (count
< os_vm_page_size
) {
216 lose("premature end of core file\n");
218 SHOW("successfully read first page of core");
223 if (val
!= CORE_MAGIC
) {
224 lose("invalid magic number in core: 0x%lx should have been 0x%x.\n",
228 SHOW("found CORE_MAGIC");
230 while (val
!= END_CORE_ENTRY_TYPE_CODE
) {
233 remaining_len
= len
- 2; /* (-2 to cancel the two ++ operations) */
234 FSHOW((stderr
, "/val=0x%ld, remaining_len=0x%ld\n",
235 (long)val
, (long)remaining_len
));
239 case END_CORE_ENTRY_TYPE_CODE
:
240 SHOW("END_CORE_ENTRY_TYPE_CODE case");
243 case VERSION_CORE_ENTRY_TYPE_CODE
:
244 SHOW("VERSION_CORE_ENTRY_TYPE_CODE case");
245 if (*ptr
!= SBCL_CORE_VERSION_INTEGER
) {
246 lose("core file version (%d) != runtime library version (%d)\n",
248 SBCL_CORE_VERSION_INTEGER
);
252 case BUILD_ID_CORE_ENTRY_TYPE_CODE
:
253 SHOW("BUILD_ID_CORE_ENTRY_TYPE_CODE case");
257 FSHOW((stderr
, "build_id[]=\"%s\"\n", build_id
));
258 FSHOW((stderr
, "remaining_len = %d\n", remaining_len
));
259 if (remaining_len
!= strlen((const char *)build_id
))
260 goto losing_build_id
;
261 for (i
= 0; i
< remaining_len
; ++i
) {
262 FSHOW((stderr
, "ptr[%d] = char = %d, expected=%d\n",
263 i
, ptr
[i
], build_id
[i
]));
264 if (ptr
[i
] != build_id
[i
])
265 goto losing_build_id
;
269 /* .core files are not binary-compatible between
270 * builds because we can't easily detect whether the
271 * sources were patched between the time the
272 * dumping-the-.core runtime was built and the time
273 * that the loading-the-.core runtime was built.
275 * (We could easily detect whether version.lisp-expr
276 * was changed, but people experimenting with patches
277 * don't necessarily update version.lisp-expr.) */
279 lose("can't load .core for different runtime, sorry\n");
282 case NEW_DIRECTORY_CORE_ENTRY_TYPE_CODE
:
283 SHOW("NEW_DIRECTORY_CORE_ENTRY_TYPE_CODE case");
284 process_directory(fd
,
286 #ifndef LISP_FEATURE_ALPHA
287 remaining_len
/ (sizeof(struct ndir_entry
) /
290 remaining_len
/ (sizeof(struct ndir_entry
) /
296 case INITIAL_FUN_CORE_ENTRY_TYPE_CODE
:
297 SHOW("INITIAL_FUN_CORE_ENTRY_TYPE_CODE case");
298 initial_function
= (lispobj
)*ptr
;
301 #if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_LUTEX)
302 case LUTEX_TABLE_CORE_ENTRY_TYPE_CODE
:
303 SHOW("LUTEX_TABLE_CORE_ENTRY_TYPE_CODE case");
305 size_t n_lutexes
= *ptr
;
306 size_t fdoffset
= (*(ptr
+ 1) + 1) * (os_vm_page_size
);
307 size_t data_length
= n_lutexes
* sizeof(struct sap
*);
308 struct lutex
**lutexes_to_resurrect
= malloc(data_length
);
311 lseek(fd
, fdoffset
+ file_offset
, SEEK_SET
);
313 FSHOW((stderr
, "attempting to read %ld lutexes from core\n", n_lutexes
));
314 bytes_read
= read(fd
, lutexes_to_resurrect
, data_length
);
317 if (bytes_read
!= data_length
) {
318 lose("Could not read the lutex table");
323 for (i
=0; i
<n_lutexes
; ++i
) {
324 struct lutex
*lutex
= lutexes_to_resurrect
[i
];
326 FSHOW((stderr
, "re-init'ing lutex @ %p\n", lutex
));
330 free(lutexes_to_resurrect
);
336 #ifdef LISP_FEATURE_GENCGC
337 case PAGE_TABLE_CORE_ENTRY_TYPE_CODE
:
340 size_t fdoffset
= (*(ptr
+1) + 1) * (os_vm_page_size
);
344 lseek(fd
, fdoffset
+ file_offset
, SEEK_SET
);
345 while ((bytes_read
= read(fd
, data
, (size
< 4096 ? size
: 4096 )))
351 bytes_read
-= sizeof(long);
352 /* Ignore all zeroes. The size of the page table
353 * core entry was rounded up to os_vm_page_size
354 * during the save, and might now have more
355 * elements than the page table.
358 page_table
[offset
].first_object_offset
= data
[i
];
365 gencgc_partial_pickup
= 1;
370 lose("unknown core file entry: %ld\n", (long)val
);
373 ptr
+= remaining_len
;
374 FSHOW((stderr
, "/new ptr=%lx\n", (unsigned long)ptr
));
376 SHOW("about to free(header)");
378 SHOW("returning from load_core_file(..)");
379 return initial_function
;